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Sample records for ces noyaux exotiques

  1. Enjeux de la gestion des espèces exotiques envahissantes dans les milieux d'eau douce en outre-mer

    Directory of Open Access Journals (Sweden)

    SOUBEYRAN, Yohann

    2012-02-01

    Full Text Available Les milieux aquatiques d’eau douce en outre-mer ne sont pas épargnés par les espèces exotiques envahissantes. Ces espèces ont des impacts négatifs, avérés ou potentiels, importants. Diverses actions sont mises en œuvre tant sur le plan national que local pour mieux les gérer, mais de nombreux défis restent encore à relever.

  2. Exotic nuclei and radioactive beams; Noyaux exotiques et faisceaux radioactifs

    Energy Technology Data Exchange (ETDEWEB)

    Chomaz, P.

    1996-12-31

    The Nuclei called exotic are all the nuclei that it is necessary to recreate in laboratory to study them. Their life time is too short -in relation to earth age- for it remains enough on earth. The researchers are going to have at their s disposal at GANIL (Caen) with the S.P.I.R.A.L. project, exotic nuclei beams and will study new kinds of nuclear reactions to better understand the atom nucleus. (N.C.). 2 refs., 9 figs.

  3. Nuclear structure of weakly bound radioactive nuclei through elastic and and inelastic scattering on proton. Impacts of the couplings induced by these exotic nuclei on direct reactions; Structure de noyaux radioactifs faiblement lies par diffusions elastiques et inelastiques sur proton. Effets des couplages induits par ces noyaux exotiques sur les reactions directes

    Energy Technology Data Exchange (ETDEWEB)

    Lapoux, V

    2005-09-15

    Information on the structure, spectroscopy and target interaction potentials of exotic nuclei can be inferred by interpreting measured data from direct reactions on proton such as elastic or inelastic scattering of proton (p,p') or one-nucleon transfer reaction (p,d). A series of experimental results has been obtained at the GANIL facilities on the setting composed of the MUST telescope array used for the detection of light charged-particles and of CATS beam detectors. This setting aims at measuring reactions on light proton or deuteron targets through reverse kinematics. Particularly, results on C{sup 10}, C{sup 11} and on direct reactions with the He{sup 8} beam of Spiral are presented. The first chapter is dedicated to the description of the most important theories concerning the nucleus. The experimental tools used to probe the nucleus are reported in the second chapter. The third and fourth chapters present the framework that has allowed us to analyse results from (p,p') and (p,d) reactions on weakly bound exotic nuclei. The last chapter is dedicated to the description of future experimental programs. (A.C.)

  4. Spiral: a new equipment for exotic nuclei; Spiral: un nouvel equipement pour les noyaux exotiques

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-02-01

    This document presents the GANIL activities and more specially the SPIRAL project. The missions of the GANIL are to allow scientists fundamental researches in Nuclear Physics and to develop applications for heavy ions in other domains. Spiral is an european project, decided by NuPECC (NUclear Physics European Collaboration Committee). It is a first generation equipment allowing the production and the acceleration of light and moderately heavy nuclei at energy range of 2 to 25 MeV/nucleus. (A.L.B.)

  5. Exotic nuclei: another aspect of nuclear structure; Les noyaux exotiques: un autre regard sur la structure nucleaire

    Energy Technology Data Exchange (ETDEWEB)

    Dobaczewski, J [Warsaw Univ., Institute of Theoretical Physics (Poland); Blumenfeld, Y; Flocard, H; Garcia Borge, M J; Nowacki, F; Rombouts, S; Theisen, Ch; Marques, F M; Lacroix, D; Dessagne, P; Gaeggeler, H

    2002-07-01

    This document gathers the lectures made at the Joliot Curie international summer school in 2002 whose theme that year was exotic nuclei. There were 11 contributions whose titles are: 1) interactions, symmetry breaking and effective fields from quarks to nuclei; 2) status and perspectives for the study of exotic nuclei: experimental aspects; 3) the pairing interaction and the N = Z nuclei; 4) borders of stability region and exotic decays; 5) shell structure of nuclei: from stability to decay; 6) variational approach of system with a few nucleons; 7) from heavy to super-heavy nuclei; 8) halos, molecules and multi-neutrons; 9) macroscopic approaches for fusion reactions; 10) beta decay: a tool for spectroscopy; 11) the gas phase chemistry of super-heavy elements.

  6. {gamma}-spectroscopy and radioactive beams: search for highly deformed exotic nuclei; Detection {gamma} et faisceaux radioactifs: recherche de noyaux exotiques tres deformes

    Energy Technology Data Exchange (ETDEWEB)

    Rosse, B

    2006-07-15

    This work is devoted to the search for highly deformed nuclei under extreme conditions of isospin, located near the proton drip-line, around A {approx} 130. The experiment was performed at GANIL (Caen) with the SPIRAL radioactive beam facility. The nuclei of interest were produced by fusion-evaporation reactions induced by the neutron deficient Kr{sup 76} radioactive beam (T1/2 = 14.8 h). {gamma}-rays were detected by the EXOGAM array, composed of 11 segmented germanium clover detectors, for which a new segment calibration method has been developed. To extract fusion-evaporation events of a overwhelming background due to the radioactivity of the beam, the EXOGAM array was coupled with the light charged particle detector DIAMANT and the high acceptance VAMOS spectrometer. The latter was used for the first time to detect fusion-evaporation residues. The detailed data analysis allowed us to demonstrate that the EXOGAM + DIAMANT + VAMOS coupling is operational and essential to investigate the structure of these nuclei. Furthermore, the first {gamma} transition was observed in the very exotic odd-odd Pm{sup 130} nucleus. The results have been interpreted with static and dynamic self-consistent microscopic calculations in collaboration with the Theoretical Physicists of the IPN Lyon. (author)

  7. Novel approach for CES1 genotyping

    DEFF Research Database (Denmark)

    Bjerre, Ditte; Berg Rasmussen, Henrik

    2018-01-01

    AIM: Development of a specific procedure for genotyping of CES1A1 (CES1) and CES1A2, a hybrid of CES1A1 and the pseudogene CES1P1. MATERIALS & METHODS: The number of CES1A1 and CES1A2 copies and that of CES1P1 were determined using real-time PCR. Long range PCRs followed by secondary PCRs allowed...

  8. Study of the first collective levels of the even-even nuclei between masses 182 and 206; Etude des premiers niveaux collectifs des noyaux pairs-pairs entre les masses 182 et 206

    Energy Technology Data Exchange (ETDEWEB)

    Barloutaud, R; Leveque, A; Lehmann, P; Quidort, J [Commissariat a l' Energie Atomique, Saclay (France).Centre d' Etudes Nucleaires

    1959-07-01

    The reduced probabilities of deexcitation of the first two 2 + levels of {sup 184}W, {sup 186}W, {sup 188}Os, {sup 190}Os, {sup 192}Os and {sup 194}Pt have been deduced from coulombic excitation experiments on these nuclei.The results are included in a chart of the properties of the first two 2 + levels of even-even nuclei situated between masses 182 and 206. The variation of these properties as a function of nuclear distortion is compared with the various theoretical predictions concerning vibration levels. (author) [French] Les probabilites reduites de desexcitation des deux premiers niveaux 2 + de {sup 184}W, {sup 186}W, {sup 188}Os, {sup 190}Os, {sup 192}Os and {sup 194}Pt ont ete deduites des experiences d'excitation coulombienne de ces noyaux. Les resultats sont inseres dans une systematique des proprietes des deux premiers niveaux 2 + des noyaux pairs-pairs situes entre les masses 182 et 206. La variation de ces proprietes en fonction de la deformation nucleaire est comparee aux diverses predictions theoriques concernant les niveaux de vibration. (auteur)

  9. Consumer surplus and CES demand

    NARCIS (Netherlands)

    ten Raa, Thijs

    2015-01-01

    This article presents the consumer surplus formula for constant elasticity of substitution (CES) demands. The formula is used to compare the monopoly and optimum provisions of product variety. It is shown that a monopolist under-provides variety. This result is contrasted with Lambertini’s analysis

  10. Cinq espèces nouvelles de Coléoptères exotiques appartenant au Musée de Leyde

    NARCIS (Netherlands)

    Lansberge, van J.W.

    1887-01-01

    Maximus, niger, nitidus, elytris basi opacis, capite thoraceque granulatis, elytris subtiliter striatis, subtus rufopilosus. Mas: capite cornu valido obliquo, thorace medio elevato transversimque carinato, carina sinuata, utrinque bidentata, dente externa valida, horizontaliter retro ducto. Fem.:

  11. Study of some continuous spectra produced by nuclear reactions with light nuclei; Etude de quelques spectres continus produits par reactions nucleaires avec des noyaux legers

    Energy Technology Data Exchange (ETDEWEB)

    Marquez, L

    1966-07-01

    The continuous spectra coming from several nuclear reactions with light nuclei were measured. The spectra can be explained by a two-step reaction mechanism; however, the reactions produced by {sup 6}Li are different. A mechanism was proposed to explain their spectra based on the following assumptions: {sup 6}Li makes a nuclear molecule with the target which subsequently breaks up in such a way that an {alpha} particle comes out with the kinetic energy that it has in the molecule. The calculated spectra and those measured are in good agreement. (author) [French] Nous avons mesure les spectres continus produits dans plusieurs reactions nucleaires avec des noyaux legers. A l'exception des spectres produits par {sup 6}Li, on a trouve qu'on pouvait expliquer ces spectres par le mecanisme des reactions en deux etapes. Nous avons propose un mecanisme pour expliquer les spectres produits par {sup 6}Li. On suppose que {sup 6}Li forme une molecule nucleaire avec la cible qui eclate ensuite de facon telle qu'une particule alpha de la molecule sort avec l'energie cinetique de son mouvement propre dans la molecule. Les spectres calcules avec ces hypotheses et les spectres mesures sont en bon accord. (auteur)

  12. Spectra theory for nuclei with closed shells (1962); Theorie des spectres des noyaux a couches completes (1962)

    Energy Technology Data Exchange (ETDEWEB)

    Gillet, V [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1962-07-01

    second approximation which alone leads to a region of optimum agreement identical for both carbon and oxygen. An excellent general agreement is obtained with the known spectra of these two nuclei. The importance of higher order terms in the calculation of the 3{sup -} and 5{sup -} collective states for calcium 40 is demonstrated; furthermore it is possible to explain these levels only by the second approximation. Certain forecasts are made using the effective forces thus found. (author) [French] On applique une theorie unifiee des spectres des noyaux a couches completes, fondee sur les excitations elementaires particule-trou de ces systemes, a l'etude du carbone 12, de l'oxygene i6 et du calcium.40. Deux approximations sont utilisees. La premiere consiste a diagonaliser l'interaction residuelle a deux corps dans un sous-espace limite de configurations a une particule et un trou. Sa validite repose sur l'energie importante exigee pour l'excitation d'une paire particule-trou. La seconde approximation consiste a resommer la sous-serie infinie des diagrammes particule-trou. Elle est equivalente a la methode de Hartree-Fock dependante du temps ou a la methode des Quasi-Bosons. Son domaine de validite, dans le cas nucleaire, n'est pas bien compris. Les diagrammes sommes sont preponderants a la limite des fortes densites, alors que la densite nucleaire est de l'ordre de l'unite. La violation des Principe de Pauli, dans cette approximation, n'est justifiee que si le nombre de paires excitees est petit par rapport au nombre d'etats de particule disponibles; or, dans les noyaux legers les degenerescences des couches sont petites. Neanmoins cette approximation qui postule l'existence d'un champ nucleaire moyen, lentement variable dans le temps par rapport aux periodes des nucleons a le merite d'etre self-consistante, de donner des etats propres orthogonaux a l'etat non physique du centre de masse et d'ameliorer le calcul des regles de somme. Pour determiner et limiter le role de la

  13. Age-Dependent Human Hepatic Carboxylesterase 1 (Ces1) and Carboxylesterase 2 (Ces2) Postnatal Ontogeny

    Science.gov (United States)

    Human hepatic carboxylesterase 1 and 2 (CES1 and CES2) are important for ester- and amide- bond containing pharmaceutical and environmental chemical disposition. Despite concern regarding juvenile sensitivity to such compounds, CES1 and CES2 ontogeny has not been well characteriz...

  14. Contribution to the study of collective states of heavy nuclei by means of coulomb excitation; Contribution a l'etude des etats collectifs des noyaux lourds par excitation coulombienne

    Energy Technology Data Exchange (ETDEWEB)

    Barloutaud, R [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1958-06-15

    The following nuclei were excited by protons of 5 MeV maximum energy: {sup 182}W - {sup 184}W - {sup 186}W - {sup 186}Os - {sup 188}Os - {sup 189}Os - {sup 190}Os - {sup 192}Os - {sup 194}Pt - {sup 196}Pt - {sup 198}Pt - {sup 198}Hg - {sup 200}Hg - {sup 202}Hg - {sup 204}Hg - {sup 206}Pb. The reduced probabilities of the various transitions were deduced from the coulomb excitation cross-section measurements. For some even-even nuclei two 2 + levels were excited. The properties of the excited levels are interpreted in terms of the collective model. (author) [French] Au moyen de protons d'energie inferieure a 5 MeV, l'excitation coulombienne des noyaux suivants a ete etudiee: {sup 182}W - {sup 184}W - {sup 186}W - {sup 186}Os - {sup 188}Os - {sup 189}Os - {sup 190}Os - {sup 192}Os - {sup 194}Pt - {sup 196}Pt - {sup 198}Pt - {sup 198}Hg - {sup 200}Hg - {sup 202}Hg - {sup 204}Hg - {sup 206}Pb. La mesure de la section efficace d'excitation coulombienne a permis de deduire les -probabilites reduites des diverses transitions observees. Dans certains noyaux pair-pair, deux niveaux de caractere 2 + ont ete excites. L'interpretation de ces niveaux en termes de niveaux de rotation et de niveaux de vibration a l'aide du modele collectif est discutee. En particulier, la variation des proprietes de ces niveaux avec la deformation nucleaire permet de fixer des limites a la validite des diverses hypotheses entrant dans le modele collectif. (auteur)

  15. Parto vaginal tras cesárea

    OpenAIRE

    San Martín Bragado, María

    2016-01-01

    Cuando una mujer ha sido sometida a una cesárea previa existen dos opciones para ella en el caso de que se quede embarazada: repetir cesárea o intentar un parto vaginal. A pesar de los riesgos, el parto vaginal después de una cesárea es una situación atractiva para muchas pacientes y dará lugar a un resultado exitoso en un alto porcentaje de casos. Se ha de tener en cuenta que la realización de una cesárea electiva no está exenta de riesgos Grado en Medicina

  16. Direct mass measurements of {sup 100}Sn and magic nuclei near the N=Z line; Mesures directes des masses de {sup 100}Sn et de noyaux exotiques proches de la ligne N = Z

    Energy Technology Data Exchange (ETDEWEB)

    Chartier, M

    1996-10-31

    The masses of nuclei far from stability are of particular interest in nuclear structure studies, and many methods of varying precision have been developed to undertake their measurement. A direct time of flight technique in conjunction with the SPEG spectrometer at GANIL has been extended to the mass measurement of proton-rich nuclei near N = Z line in the mass region A {approx_equal} 60-80 known to provide input for astrophysical modelling of the rp-process and information relevant to the nuclear structure in a region of high deformation. The radioactive beams were produced via the fragmentation of a {sup 78}Kr beam on a {sup nat}Ni target, using the new SISSI device. A purification method based on the stripping of the secondary ions was successfully used for the first time, and the masses of {sup 70}Se and {sup 71}Se were measured. In order to improve the mass resolution for heavier nuclei, another method using the second cyclotron of GANIL (CSS2) as a high resolution spectrometer has been developed. An experiment aimed at measuring the masses of A 100 isobars in the vicinity of the doubly magic nucleus {sup 100}Sn was successfully performed, using this original technique. Secondary ions of {sup 100}Ag, {sup 100}Cd, {sup 100}In and {sup 100}Sn produced via fusion-evaporation reaction {sup 50}Cr + {sup 58}Ni and simultaneously accelerated in the CSS2 cyclotron. The mass of {sup 100}Cd and, for the first time, the masses of {sup 100}Sn were determined directly with respect to the reference mass of {sup 100}Ag. These results have been compared to various theoretical predictions and open the discussion on considerations of spin-isospin symmetry. (author). 96 refs.

  17. Experimental study on beam for composite CES structural system

    Science.gov (United States)

    Matsui, Tomoya

    2017-10-01

    Development study on Concrete Encase Steel (CES) composite structure system has been continuously conducted toward the practical use. CES structure is composed of steel and fiber reinforced concrete. In previous study, it was found that CES structure has good seismic performance from experimental study of columns, beam - column joints, shear walls and a two story two span frame. However, as fundamental study on CES beam could be lacking, it is necessary to understand the structural performance of CES beam. In this study, static loading tests of CES beams were conducted with experimental valuable of steel size, the presence or absence of slab and thickness of slab. And restoring characteristics, failure behavior, deformation behavior, and strength evaluation method of CES beam were investigated. As the results, it was found that CES beam showed stable hysteresis behavior. Furthermore it was found that the flexural strength of the CES beam could be evaluated by superposition strength theory.

  18. Study of the dispersion phenomena connected with the absorption by recoilless nuclear resonance fluorescence; Etude des phenomenes de dispersion lies a l'absorption resonnante sans recul des noyaux atomiques

    Energy Technology Data Exchange (ETDEWEB)

    Imbert, P [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1965-12-01

    In nuclear resonance fluorescence as in the optical field abnormal dispersion curves are related to the absorption lines. It is possible, by using quadrupolar or magnetic splitting of the line in the case of recoilless resonance fluorescence (Moessbauer effect) to obtain differential dispersion effects between the two orthogonal linear or the two inverse circular components of the incident gamma radiation. These effects induce bi-refraction phenomena or Faraday rotation on the gamma beam, which have been studied on Fe-57 enriched absorbers. (author) [French] Comme dans le domaine optique, aux raies d'absorption de fluorescence resonnante des noyaux atomiques sont associees des courbes de dispersion anormale. Les decompositions des raies d'absorption de fluorescence resonnante sans recul (raies Moessbauer) par couplage quadrupolaire ou effet Zeeman permettent d'obtenir des effets dispersifs differentiels entre composantes lineaires orthogonales ou circulaires inverses du rayonnement gamma incident. Ces effets se traduisent par des phenomenes de birefringence ou de rotation Faraday, qui ont pu etre etudies sur des milieux enrichis en fer-57. (auteur)

  19. LES PROLIFÉRATIONS VÉGÉTALES AQUATIQUES EN FRANCE : CARACTÈRES BIOLOGIQUES ET ÉCOLOGIQUES DES PRINCIPALES ESPÈCES ET MILIEUX PROPICES. I. BILAN D’UNE SYNTHÈSE BIBLIOGRAPHIQUE.

    Directory of Open Access Journals (Sweden)

    PELTRE M. C.

    2002-04-01

    Full Text Available La gestion des milieux aquatiques touchés par des proliférations végétales rencontre de nombreuses difficultés liées à l’appréciation des déséquilibres induits. Parmi celles-ci figure l’évaluation de l’intensité des phénomènes, tant à l’échelle spatiale que temporelle, et celle des nuisances qui réduisent la satisfaction des usages. Un inventaire des principaux groupes de végétaux concernés, considérés comme des « espèces à risque de prolifération » a été dressé après examen de divers constats recensés sur le territoire français. Ce sont notamment des macro-algues, des cyanobactéries, des phanérogames hydrophytes autochtones comme Ranunculus sp., Potamogeton sp., Myriophyllum sp., Ceratophyllum sp., Lemna sp., et des hydrophytes introduits comme Elodea sp., Lagarosiphon sp., Ludwigia sp., Myriophyllum aquaticum, certains hélophytes et deux espèces rivulaires exotiques (Fallopia japonica et Impatiens glandulifera. Leurs potentialités importantes de développement et de propagation s’expliquent par leurs stratégies biologiques, dont certaines adaptations morphologiques et physiologiques et divers moyens de multiplication végétative. Les milieux propices aux proliférations présentent des conditions environnementales particulières : fort éclairement souvent lié à une faible profondeur et à un échauffement des eaux, conditions hydrologiques stables, minéralisation moyenne à forte, niveau trophique souvent élevé. La conjonction de ces deux composantes (espèce à risque et milieu propice, crée ainsi les conditions d’une prolifération et définit des situations à risque minimal ou maximal. Ces connaissances concourent à une meilleure définition des situations de risque de prolifération et peuvent fournir des informations utiles quant aux conditions et aux limites d’application des techniques de gestion et de contrôle de ces phénomènes.

  20. PisCES: Pis(cine) Community Estimation Software

    Science.gov (United States)

    PisCES predicts a fish community for any NHD-Plus stream reach in the conterminous United States. PisCES utilizes HUC-based distributional information for over 1,000 nature and non-native species obtained from NatureServe, the USGS, and Peterson Field Guide to Freshwater Fishes o...

  1. CES--Cultural, Experiential, Skill Building: The Cognitive Foundation.

    Science.gov (United States)

    Rheams, Annie E.; Gallagher, Maureen

    1995-01-01

    Critiques the assimilation strategy and the hero-heroine-ritual approach to multicultural education, and offers a third model, the Cultural, Experiential, Skill Building (CES) approach, as an alternative for teacher training. Effects of the CES model on potential teachers and the implications for teacher training are addressed. (GR)

  2. Analysis list: ces-1 [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available ces-1 Embryo,Larvae + ce10 http://dbarchive.biosciencedbc.jp/kyushu-u/ce10/target/c...es-1.1.tsv http://dbarchive.biosciencedbc.jp/kyushu-u/ce10/target/ces-1.5.tsv http://dbarchive.biosciencedbc....jp/kyushu-u/ce10/target/ces-1.10.tsv http://dbarchive.biosciencedbc.jp/kyushu-u/ce10/colo/ces-1.Embryo.tsv,http://dbarchive.bioscien...cedbc.jp/kyushu-u/ce10/colo/ces-1.Larvae.tsv http://dbarchive.bioscience...dbc.jp/kyushu-u/ce10/colo/Embryo.gml,http://dbarchive.biosciencedbc.jp/kyushu-u/ce10/colo/Larvae.gml ...

  3. Synthesis of CeS and interactions with molten metals

    International Nuclear Information System (INIS)

    Krikorian, O.H.; Curtis, P.G.

    1988-01-01

    Hot-pressed and sintered discs of single-phase CeS were tested for interaction with molten aluminium, uranium, and iron to determine the conditions under which reaction first begins and the nature of the reaction. Aluminium begins to react with CeS at ∼ 1190 K, slowly dissolving cerium and forming a thin layer of Ce 3 S 4 at the reaction interface. At 1363 K, aluminium wets and spreads over the CeS surface and dissolves ∼ 01 at% Ce. Ce 3 Al 11 precipitates out in the aluminium phase on cooldown. Uranium does not react with CeS at 1673 K, but at 1873 K it wets and spreads on CeS and dissolves ∼ 100 atom ppm S, which precipitates out as US on cooldown. Iron wets CeS at 1873 K and 1973 K but does not spread or interact. Because of the desirable containment characteristics of CeS and similar sulfides for molten metals, we recommend their use in a number of applications. (author)

  4. Contribution to the study of deformed heavy nuclei by means of nuclear reactions; Contribution a l'etude des noyaux lourds deformes au moyen de reactions nucleaires

    Energy Technology Data Exchange (ETDEWEB)

    Gastebois, J. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1968-06-01

    The experimental results obtained in the study of the (d,p) reactions, at E{sub d} = 12 MeV, on the three even-even deformed nuclei {sup 170}Yb, {sup 172}Yb and {sup 174}Yb have been analysed in terms of DWBA calculations. The spectroscopic information relative to the odd final nuclei have been compared with the predictions of the collective model and of the Nilsson's model. The effect of various parameters used in the DWBA analysis (form factors, optical wave functions) has been carefully studied. The observed differences between the three final nuclei are qualitatively reproduced in the experimental study of resonances, seen in excitation functions of elastically and inelastically scattered protons on the same target nuclei, and corresponding to analogue states in the three nuclei {sup 171}Lu, {sup 173}Lu and {sup 175}Lu. (author) [French] Les resultats experimentaux de l'etude des reactions (d.p) a E{sub d} = 12 MeV, sur les noyaux deformes pairs-pairs {sup 170}Yb, {sup 172}Yb et {sup 174}Yb ont ete interpretes dans le cadre de l'approximation de Born des ondes deformees. Les informations spectroscopiques relatives aux noyaux impairs finals ont ete comparees aux predictions du modele collectif et du modele de Nilsson, apres avoir examine avec soin l'influence des differents parametres (facteurs de forme, fonctions d'onde 'optiques') utilises lors de l'analyse. Les differences observees entre les trois noyaux finals sont qualitativement reproduites par les resultats experimentaux de l'etude de resonances dans les fonctions d'excitation de diffusion elastique et inelastique de protons sur les memes noyaux-cibles, lors de la recherche d'etats analogues dans les noyaux {sup 171}Lu, {sup 173}Lu et {sup 175}Lu. (auteur)

  5. Anestesia para cesárea en paciente con acondroplasia

    OpenAIRE

    Osorio Rudas, Walter; Socha García, Nury Isabel; Upegui, Alejandro; Ríos Medina, Ángela; Moran, Adrian; Aguirre Ospina, Oscar; Rivera, Carlos

    2012-01-01

    Introducción: En gestantes acondroplásicas se recomienda el parto por cesárea con anestesia general; sin embargo, recientemente se ha reportado el uso de técnicas conductivas con resultados adecuados. Objetivo:Describir el manejo anestésico de una paciente con acondroplasia programada para cesárea utilizando anestesia combinada espinal-epidural. Métodos y resultados:Mostramos el caso de una primigestante acondroplásica con 110 cm de estatura y embarazo de 37 semanas, en quien se realizó cesár...

  6. Dolor postoperatorio en mujeres sometidas a cesárea

    OpenAIRE

    Borges, Natalia Carvalho; Silva, Brunna Costa e; Pedroso, Charlise Fortunato; Silva, Tuany Cavalcante; Tatagiba, Brunna Silva Ferreira; Pereira, Lílian Varanda

    2017-01-01

    RESUMEN Objetivo Estimar la incidencia, intensidad y calidad del dolor postoperatorio en mujeres sometidas a cesárea. Método Estudio de corte transversal. Fueron entrevistadas 1062 mujeres sometidas a cesárea en el periodo pre y post cirugía inmediatos. La intensidad del dolor y la calidad fueron evaluadas por la Escala Numérica del Dolor (0-10) y el Test de Dolor de McGill. Las variables se analizaron utilizando medidas descriptivas y la incidencia de dolor postoperatorio calculado con u...

  7. ¿Las mujeres prefieren las cesáreas?

    Directory of Open Access Journals (Sweden)

    A. Vallejos Parás

    2016-07-01

    Full Text Available Las tasas de cesárea han aumentado de manera constante en la mayoría de los países de medianos y altos ingresos en los últimos decenios sin justificación médica. La solicitud materna es uno de los factores no médicos citados con frecuencia que contribuyen a esta tendencia. El objetivo de este documento es realizar una revisión de la bibliografía actual sobre las preferencias maternas por la cesárea.

  8. On Estimation of the CES Production Function - Revisited

    DEFF Research Database (Denmark)

    Henningsen, Arne; Henningsen, Geraldine

    2012-01-01

    Estimation of the non-linear Constant Elasticity of Scale (CES) function is generally considered problematic due to convergence problems and unstable and/or meaningless results. These problems often arise from a non-smooth objective function with large flat areas, the discontinuity of the CES...... function where the elasticity of substitution is one, and possibly significant rounding errors where the elasticity of substitution is close to one. We suggest three (combinable) solutions that alleviate these problems and improve the reliability and stability of the results....

  9. Reappraisal of the genetic diversity and pharmacogenetic assessment of CES1

    DEFF Research Database (Denmark)

    Ferrero-Miliani, Laura; Bjerre, Ditte; Stage, Claus

    2017-01-01

    The CES1 gene encodes a hydrolase that metabolizes important drugs. Variants generated by exchange of segments with CES1P1 complicate genotyping of CES1. Using a highly specific procedure we examined DNA samples from 200 Caucasians and identified 46 single nucleotide variants (SNVs) in CES1 and 2...

  10. Basic topological and geometric properties of Ces`aro–Orlicz spaces

    Indian Academy of Sciences (India)

    Abstract. Necessary and sufficient conditions under which the Ces`aro–Orlicz sequence space cesφ is nontrivial are presented. It is proved that for the Luxemburg norm, Ces`aro–. Orlicz spaces cesφ have the Fatou property. Consequently, the spaces are complete. It is also proved that the subspace of order continuous ...

  11. Calcined eggshell (CES): An efficient natural catalyst for ...

    Indian Academy of Sciences (India)

    hydes with active methylene compounds using calcined eggshell (CES) as an efficient ... of the important reactions to achieve carbon–carbon ... solid catalyst for biodiesel production,24 as a catalyst ... which supports for adsorption of water on CaO and ... The organic phase .... After extraction of the product with ethylac-.

  12. Ukraine Between The EU And The CES In Global Instability

    Directory of Open Access Journals (Sweden)

    Svitlana Radzievska

    2013-01-01

    Full Text Available The article reviews functioning and development of the European Union (EU and the Common Economic Space (CES in the global instability and substantiates the equal significance of Ukraine’s integration with these regional associations in today’s environment. This conclusion is based upon the current state of Ukraine’s trade and economic relations with the countries taking part in these integration associations, and the probability of: 1 the EU’s abstaining from admitting new members until the EU structure improves, or admitting new members while changing the mechanism of interaction within the EU and setting more stringent admission criteria, 2 changes in the terms of trade of Ukraine with the CES member states due to its transformation into the Eurasian Economic Community (EEC.

  13. Sur quelques espèces du genre Scarabaeus L

    NARCIS (Netherlands)

    Gillet, Joseph J.E.

    1909-01-01

    Dans une note insérée aux Annali del Museo Civico di storia naturale di Genova ¹), je rue suis occupé, entre autres choses, de la synonymie de quelques espèces de Scarabaeus; je désire revenir sur ce sujet et y ajouter les remarques que m’a suggérées l’examen du type de S. van der Kelleni LSBG. et

  14. Photoionization sensor CES for non-invasive medical diagnostics

    Science.gov (United States)

    Mustafaev, Aleksandr; Rastvorova, Iuliia; Khobnya, Kristina; Podenko, Sofia

    2016-10-01

    Method CES (collisional electron spectroscopy), patented in Russia, the USA, Japan, China, Germany and Britain, allows to analyze the gaseous mixtures using electron spectroscopy under high pressures up to atmospheric without using vacuum. The design of VUV photoionization detector was developed based on this method. Such detector is used as a portable gas analyzer for continuous personal bio-medical monitoring. This detector measures energy of electrons produced in ionization with resonance photons, whose wavelength situated in the vacuum ultraviolet (VUV). Nowadays, micro plasma source of such photons on resonant line of Kr with energy of 10,6 eV is developed. Only impurities are ionized and detected by the VUV-emission, meanwhile the main components of air stay neutral that reduces background signal and increases the sensibility along with accuracy. The experimental facilities with VUV photoionization sensors CES are constructed with the overall sizes about 10*10*1 mm. The watt consumption may comprise less than 1W. Increase of electrometer amplifier's sensibility and more high-aperture construction are used today to increase the sensibility of CES-detectors. The wide range of detectable molecules and high sensitivity allow the development of portable device, which can become the base of the future preventive medicine. Work supported by Foundation for Assistance to Small Innovative Enterprises in Science and Technology.

  15. Reaction cross section measurements of neutron-rich exotic nuclei in the vicinity of closed shells N=20 and N=28; Mesures de section efficace de reaction de noyaux exotiques riches en neutrons dans la zone de fermeture des couches N=20 et N=28

    Energy Technology Data Exchange (ETDEWEB)

    Khouaja, A

    2003-12-01

    Using the direct method, the mean energy integrated reaction cross section was investigated for a wide range of neutron-rich nuclei (N {yields} Ar) at GANIL. Using the parametrisation of S. Kox, 19 new radii measurements (reaction cross sections) were obtained. By the isotopic, isotonic and isospin dependence, the evolution of the strong reduced radius was studied according to the excess of neutrons. New halo effect is proposed to the nuclei of Mg{sup 35} and S{sup 44}. A quadratic parametrization is also proposed for the nuclear radius as a function of the isospin in the region of closed shells N=8 and N=28. In addition, we used a modified version of the Glauber model for studying the tail and matter distribution of nuclei. Indeed, using our new data the effects of the nuclear size (root mean square radii) and the matter distribution (diffusivity) were de-convoluted for each isotope. The root mean square radii of Na and Mg isotopes obtained so far were consistent with the ones from literature. (author)

  16. New experimental method to study the collective modes in exotic nuclei; influence of the superfluidity on the cooling time of a neutron star; Nouvelle methode experimentale dediee a l'etude des modes collectifs dans les noyaux exotiques; influence de la superfluidite sur le temps de refroidissement d'une etoile a neutrons

    Energy Technology Data Exchange (ETDEWEB)

    Monrozeau, Ch

    2007-07-15

    Giant monopole (GMR) and quadrupole (GQR) resonances have been measured in the {sup 56}Ni using inelastic scattering of 50 A.MeV deuteron at the Grand Accelerateur National d'Ions Lourds facility. This is the first experimental observation of isoscalar collective modes in a short-lived nucleus. The secondary beam was impinged on the active target Maya filled with a pure deuterium gas. Recoiling deuterons were detected in Maya and in a wall of nine silicon detectors. The GMR and GQR are centered at 19.3(0.5) and 16.2(0.5) MeV, respectively. Corresponding angular distributions were extracted from 3 to 7 degrees in the centre of mass frame. DWBA analysis based on RPA transition densities yields the percentage of the energy weighted sum rule exhausted: 136(27) % for the GMR et 76(13) % for the GQR. A finite temperature Hartree-Fock-Bogoliubov model was implemented to describe the 10 Wigner-Seitz cells which compose the inner crust of neutron stars and to microscopically calculate their specific heat. Calculations are performed with two contact pairing forces chosen to simulate the pairing properties of uniform neutron matter corresponding to the BCS approximation and to polarisation effects. Under the assumption of a rapid cooling of the core and an initial temperature of 100 keV in the inner crust, the cooling time of the star was estimated at 9 and 34 years, respectively. (author)

  17. One-nucleon transfer reactions induced by secondary beam of {sup 11}Be: study of the nuclear structure of the exotic nuclei {sup 11}Be and {sup 10}Li; Reactions de transfert d'un nucleon induites par un faisceau secondaire de {sup 11}Be: etude de la structure des noyaux exotiques {sup 11}Be et {sup 10}Li

    Energy Technology Data Exchange (ETDEWEB)

    Pita, S

    2000-09-01

    The structure of the neutron rich light nuclei {sup 11}Be and {sup 10}Li has been investigated by means of one nucleon transfer reactions. The experiments have been carried out at GANIL in inverse kinematics using {sup 11}Be secondary beams. The {sup 11}Be(p,d){sup 10}Be reaction bas been studied at 35.3 MeV/u. The {sup 10}Be ejectiles were analyzed by the spectrometer SPEG, and coincident deuterons were detected in the position sensitive silicon detector CHARISSA. Transfer cross sections to 0{sup +}{sub 1} and 2{sup +}{sub 1}, states in {sup 10}Be were measured up to {theta}{sub CM} = 16 deg. and compared to DWBA and CRC predictions. The effects of neutron-cure couplings on reaction form factors have been studied by solving coupled equations in the framework of a vibrational model. It is shown that the rate of core excitation {sup 10}Be{sub 2+} in the {sup 11}Be{sub gs} wave function is overestimated by a standard analysis with form factors given by the usual Separation Energy prescription. The former model predicts a rate of core excitation of 16% and leads to theoretical cross sections which are in good agreement with the experimental data. The aim of the {sup 11}Be(d,{sup 3}He){sup 10}Li experiment, realized at 37 MeV/u, was to measure the distribution of the 2s neutron strength in the unbound nucleus {sup 10}Li. The energy spectrum was deduced from the {sup 3}He energy and angle measured by the silicon strip detector array MUST. An asymmetric peak is clearly observed near the threshold, with a maximum at -S{sub n} = 130 keV. This constitutes a direct proof of the inversion of 2s and 1p{sub 1/2} shells in {sup 10}Li, which was until now a controversial question in spite of many experimental efforts. On the other band the analysis of the {sup 11}Be(d,t){sup 10}Be reaction studied in the same experiment confirms the results obtained in the {sup 11}Be(p,d){sup 10}Be reaction concerning the {sup 11}Be{sub gs} structure. This work shows the interest and feasibility of studies of the shell properties of exotic nuclei using transfer reactions induced by radioactive beams and constitutes the beginning of a program devoted to this kind of experiment. (author)

  18. Spectroscopy of exotic nuclei with A {approx} 190: single particle states and collective properties of {sup 187,189}Bi and {sup 188}Pb; Spectroscopie de noyaux exotiques dans la region de masse A {approx} 190: la structure des isotopes {sup 187,189}Bi et {sup 188}Pb

    Energy Technology Data Exchange (ETDEWEB)

    Huerstel, A

    2002-11-01

    This thesis is devoted to the study of very neutron deficient nuclei in the lead region of the nuclear chart and more precisely to the investigation of the single particle states and collective properties of the {sup 187,189}Bi isotopes by gamma-ray spectroscopy. These nuclei were produced via fusion-evaporation reaction induced by a krypton beam on a silver target. In this mass region, the cross section for producing these nuclei are very low, of the order of a few micro-barns, making experimental studies very difficult. The identification of the nuclei was done using the very powerful RDT (Recoil Decay Tagging) technique, based on the selection of the isotopes through their characteristic alpha-particle decays. The experiments were performed at the university of Jyvdskyla (Finland) with the facility combining the gamma-ray spectrometer JUROSPHERE and the magnetic gas-filled separator RITU. Isomeric states were observed in both nuclei and their life-times measured. The systematics of individual proton states in odd-mass bismuth isotopes have been reproduced with a shell model up to 20 neutrons away from the valley of stability. Furthermore, rotational bands, a signature of collective nuclear motion, have been established for the first time in these nuclei. The interpretation of these results led to the conclusion that {sup 187,189}Bi have a prolate shape at low excitation energy, unlike the heavier bismuth isotopes which have been interpreted to have oblate deformation, implying a shape transition in this mass region. Hartree-Fock-Bogolyubov calculations are consistent with the experimental indication of shape coexistence, as seen in the neighbouring even-even lead nuclei. (author)

  19. Endometritis post-cesárea: factores de riesgo.

    OpenAIRE

    BURGOS SALINAS, Silvia; CARBAJAL ARROYO, Luz; SAONA UGARTE, Pedro

    2013-01-01

    Objetivo: Determinar los factores de riesgo de endometritis post-cesárea (EPC). Materiales y métodos: Se realizó un estudio retrospectivo caso-control en el Servicio de Obstetricia del Hospital Nacional Cayetano Heredia del 1 de Enero de 1992 al 31 de Julio de1996. Para el análisis estadístico se utilizó análisis bivariado y multivariado de regresión logística. Resultados: Durante este período se detectaron 82 pacientes con diagnóstico clínico de endometritis, seleccionándose aleatoriamente i...

  20. Endometritis post-cesárea: factores de riesgo

    OpenAIRE

    Burgos Salinas, Silvia; Carbajal Arroyo, Luz; Saona Ugarte, Pedro

    1999-01-01

    Objetivo: Determinar los factores de riesgo de endometritis post-cesárea (EPC). Materiales y métodos: Se realizó un estudio retrospectivo caso-control en el Servicio de Obstetricia del Hospital Nacional Cayetano Heredia del 1 de Enero de 1992 al 31 de Julio de1996. Para el análisis estadístico se utilizó análisis bivariado y multivariado de regresión logística. Resultados: Durante este período se detectaron 82 pacientes con diagnóstico clínico de endometritis, seleccionándose aleatoriamente i...

  1. Utilisation des espèces du genre Aframomum ( Aframomum ...

    African Journals Online (AJOL)

    La génération des radicaux libres résultant de l'oxydation des lipides est l'un des problèmes associés à la perte des aliments et des maladies notamment celles liées au surpoids et à l'obésité. Les espèces oxygénées réactives telles que le radical hydroxyle et les hydroperoxydes sont généralement produites par des ...

  2. Endometritis post-cesárea: factores de riesgo

    Directory of Open Access Journals (Sweden)

    Silvia Burgos Salinas

    1999-07-01

    Full Text Available Objetivo: Determinar los factores de riesgo de endometritis post-cesárea (EPC. Materiales y métodos: Se realizó un estudio retrospectivo caso-control en el Servicio de Obstetricia del Hospital Nacional Cayetano Heredia del 1 de Enero de 1992 al 31 de Julio de1996. Para el análisis estadístico se utilizó análisis bivariado y multivariado de regresión logística. Resultados: Durante este período se detectaron 82 pacientes con diagnóstico clínico de endometritis, seleccionándose aleatoriamente igual número de pacientes operadas de cesárea con puerperio normal. Los factores relacionados con un riesgo significativo de EPC fueron: edad materna menor de 21 años y valores de hematocrito post-operatorio menor o igual a 30%. En el grupo de pacientes con endometritis el 45.1% de las pacientes tuvieron infección concomitante, siendo la infección de herida operatoria (29.3% y la del tracto urinario (11% las más frecuentes. ( Rev Med Hered 1999; 10:105-110 .

  3. Wound-Healing Potential of Cultured Epidermal Sheets Is Unaltered after Lyophilization: A Preclinical Study in Comparison to Cryopreserved CES

    Directory of Open Access Journals (Sweden)

    H. Jang

    2013-01-01

    Full Text Available Lyophilized Cultured Epidermal Sheets (L-CES have been reported to be as effective as the cryopreserved CES (F-CES in treating skin ulcers. However, unlike F-CES, no preclinical study assessing wound-healing effects has been conducted for L-CES. The present study was set out to investigate the microstructure, cytokine profile, and wound-healing effects of L-CES in comparison to those of F-CES. Keratinocytes were cultured to prepare CES, followed by cryopreservation at −70°C and lyophilization. Under microscopic observation, intact cells with apparent intracellular junctions were observed in L-CES. The L-CES, like fresh CES, consisted of three to four well-maintained epidermal layers, as shown by the expression of keratins, involucrin, and p63. There were no differences in the epidermal layer or protein expression between L-CES and F-CES, and both CES were comparable to fresh CES. TGF-α, EGF, VEGF, IL-1α, and MMPs were detected in L-CES at levels similar to those in F-CES. In a mouse study, wounds treated with L-CES or F-CES completely healed at least 4 days faster than untreated wounds. CES-treated wounds completely healed by day 10, while the untreated wounds did not heal by day 14. Masson’s trichrome staining showed that collagen deposition in the CES-treated wounds was highly increased in the dermis of the wound center compared to that in the control wounds. Thus, this study demonstrates that L-CES is as clinically effective as F-CES for wound treatment.

  4. Energy-Extended CES Aggregate Production: Current Aspects of Their Specification and Econometric Estimation

    Directory of Open Access Journals (Sweden)

    Paul E. Brockway

    2017-02-01

    Full Text Available Capital–labour–energy Constant Elasticity of Substitution (CES production functions and their estimated parameters now form a key part of energy–economy models which inform energy and emissions policy. However, the collation and guidance as to the specification and estimation choices involved with such energy-extended CES functions is disparate. This risks poorly specified and estimated CES functions, with knock-on implications for downstream energy–economic models and climate policy. In response, as a first step, this paper assembles in one place the major considerations involved in the empirical estimation of these CES functions. Discussions of the choices and their implications lead to recommendations for CES empiricists. The extensive bibliography allows those interested to dig deeper into any aspect of the CES parameter estimation process.

  5. Sacubitril Is Selectively Activated by Carboxylesterase 1 (CES1) in the Liver and the Activation Is Affected by CES1 Genetic Variation.

    Science.gov (United States)

    Shi, Jian; Wang, Xinwen; Nguyen, Jenny; Wu, Audrey H; Bleske, Barry E; Zhu, Hao-Jie

    2016-04-01

    Sacubitril was recently approved by the Food and Drug Administration for use in combination with valsartan for the treatment of patients with heart failure with reduced ejection fraction. As a prodrug, sacubitril must be metabolized (hydrolyzed) to its active metabolite sacubitrilat (LBQ657) to exert its intended therapeutic effects. Thus, understanding the determinants of sacubitril activation will lead to the improvement of sacubitril pharmacotherapy. The objective of this study was to identify the enzyme(s) responsible for the activation of sacubitril, and determine the impact of genetic variation on sacubitril activation. First, an incubation study of sacubitril with human plasma and the S9 fractions of human liver, intestine, and kidney was conducted. Sacubitril was found to be activated by human liver S9 fractions only. Moreover, sacubitril activation was significantly inhibited by the carboxylesterase 1 (CES1) inhibitor bis-(p-nitrophenyl) phosphate in human liver S9. Further incubation studies with recombinant human CES1 and carboxylesterase 2 confirmed that sacubitril is a selective CES1 substrate. The in vitro study of cell lines transfected with wild-type CES1 and the CES1 variant G143E (rs71647871) demonstrated that G143E is a loss-of-function variant for sacubitril activation. Importantly, sacubitril activation was significantly impaired in human livers carrying the G143E variant. In conclusion, sacubitril is selectively activated by CES1 in human liver. The CES1 genetic variant G143E can significantly impair sacubitril activation. Therefore, CES1 genetic variants appear to be an important contributing factor to interindividual variability in sacubitril activation, and have the potential to serve as biomarkers to optimize sacubitril pharmacotherapy. Copyright © 2016 by The American Society for Pharmacology and Experimental Therapeutics.

  6. Hartree-Fock theory for the equilibrium shape of light nuclei; Theorie Hartree-Fock de la forme d'equilibre des noyaux legers

    Energy Technology Data Exchange (ETDEWEB)

    Ripka, G [Commissariat a l' Energie Atomique, 91 - Saclay (France). Centre d' Etudes Nucleaires

    1968-09-01

    Most of the content of this thesis is published in english in Advances In Nuclear Physics, Vol. 1 (Editors: Baranger and Vogt - Plenum Press). The Hartree- Fock equations are derived. The expansions of the orbits and the possible symmetries of the Hartree-Fock field are discussed. Wavefunctions of even-even N = Z nuclei are given for 12 {<=} A {<=} 40. The role of the monopole, quadrupole and exchange components of the force are discussed. The multiplicity of the solutions and the effect of the spin-orbit interaction are discussed. Exact angular momentum projection is used to generate rotational bands. The validity of the adiabatic rotational model in light nuclei is discussed. Hartree-Fock calculations are extended to include major-shell mixing in order to obtain quadrupole deformations without the use of effective charge. The incompressibility, of nuclei is discussed and the compatibility between the Hartree-Fock solutions, the Mottelson model of quadrupole deformations and the SU3 states of J.P. Elliott and M. Moshinsky is established. (author) [French] La theorie de Hartree-Fock est appliquee au calcul des fonctions d'onde des noyaux legers deformes. Les equations de Hartree-Fock, les symetries permises et le choix du developpement des orbites sont discutes. Les fonctions d'onde des noyaux pair-pairs N = Z (12 {<=} A {<=} 40) sont tabulees. Les contributions des composantes monopolaires et quadrupolaires ainsi que des termes d'echange de la force nucleon-nucleon sont discutees. La methode de projection de moment cinetique est utilisee pour engendrer les bandes de rotation. La validite du modele rotationnel adiabatique est discutee. Les calculs de Hartree-Fock qui tiennent compte du melange de plusieurs couches majeures dans chaque orbite sont appliques au calcul des deformations quadrupolaires sans l'utilisation de charge effective. L'incompressibilite des noyaux et la compatibilite des fonctions d'onde de Hartree- Fock avec les fonctions d'onde SU3 de J

  7. Hartree-Fock theory for the equilibrium shape of light nuclei; Theorie Hartree-Fock de la forme d'equilibre des noyaux legers

    Energy Technology Data Exchange (ETDEWEB)

    Ripka, G. [Commissariat a l' Energie Atomique, 91 - Saclay (France). Centre d' Etudes Nucleaires

    1968-09-01

    Most of the content of this thesis is published in english in Advances In Nuclear Physics, Vol. 1 (Editors: Baranger and Vogt - Plenum Press). The Hartree- Fock equations are derived. The expansions of the orbits and the possible symmetries of the Hartree-Fock field are discussed. Wavefunctions of even-even N = Z nuclei are given for 12 {<=} A {<=} 40. The role of the monopole, quadrupole and exchange components of the force are discussed. The multiplicity of the solutions and the effect of the spin-orbit interaction are discussed. Exact angular momentum projection is used to generate rotational bands. The validity of the adiabatic rotational model in light nuclei is discussed. Hartree-Fock calculations are extended to include major-shell mixing in order to obtain quadrupole deformations without the use of effective charge. The incompressibility, of nuclei is discussed and the compatibility between the Hartree-Fock solutions, the Mottelson model of quadrupole deformations and the SU3 states of J.P. Elliott and M. Moshinsky is established. (author) [French] La theorie de Hartree-Fock est appliquee au calcul des fonctions d'onde des noyaux legers deformes. Les equations de Hartree-Fock, les symetries permises et le choix du developpement des orbites sont discutes. Les fonctions d'onde des noyaux pair-pairs N = Z (12 {<=} A {<=} 40) sont tabulees. Les contributions des composantes monopolaires et quadrupolaires ainsi que des termes d'echange de la force nucleon-nucleon sont discutees. La methode de projection de moment cinetique est utilisee pour engendrer les bandes de rotation. La validite du modele rotationnel adiabatique est discutee. Les calculs de Hartree-Fock qui tiennent compte du melange de plusieurs couches majeures dans chaque orbite sont appliques au calcul des deformations quadrupolaires sans l'utilisation de charge effective. L'incompressibilite des noyaux et la compatibilite des fonctions d'onde de Hartree- Fock avec les

  8. Some considerations of the energy spectrum of odd-odd deformed nuclei; Quelqes considerations sur le spectre d'energie des noyaux impair-impair deformes

    Energy Technology Data Exchange (ETDEWEB)

    Alceanu-G, Pinho de; Picard, J [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1965-07-01

    The odd-odd deformed nuclei are described as a rotator plus two odd nucleons moving in orbitals {omega}{sub p} and {omega}{sub n} of the deformed potential. We investigate the energies and wave functions of the various states of the ({omega}{sub p}, {omega}{sub n}) configurations by calculating and numerically diagonalizing the Hamiltonian matrix (with R.P.C. and residual interactions). The Gallagher-Mosskowski coupling rules ana the abnormal K equals 0 rotational bands are discussed. (authors) [French] Les noyaux impair-impairs deformes sont decrits comme un rotateur plus deux nucleons non apparies dans les orbites {omega}{sub p} et {omega}{sub n} du potentiel deforme. Nous etudions le spectre d'energie et les fonctions d'onde des configurations ({omega}{sub p}, {omega}{sub n}) en tenant compte de l'interaction particule-rotation et de la force residuelle entre les deux nucleons celibataires.

  9. Individualization of treatments with drugs metabolized by CES1: combining genetics and metabolomics

    DEFF Research Database (Denmark)

    Rasmussen, Henrik B.; Bjerre, Ditte; Linnet, Kristian

    2015-01-01

    CES1 is involved in the hydrolysis of ester group-containing xenobiotic and endobiotic compounds including several essential and commonly used drugs. The individual variation in the efficacy and tolerability of many drugs metabolized by CES1 is considerable. Hence, there is a large interest in in...

  10. Correlations between the BDI and CES-D in a Sample of Adolescent Mothers.

    Science.gov (United States)

    Wilcox, Holly; Field, Tiffany; Prodromidis, Margarita; Scafidi, Frank

    1998-01-01

    The adequacy of the Beck Depression Inventory (BDI) and Center for Epidemiological Studies-Depression (CES-D) as screening instruments for adolescent depression is examined. Both are correlated with the Diagnostic Interview Schedule for Children, a clinical measure. BDI correlates more highly with Major Depression subscale, CES-D to Dysthymia…

  11. Two alleles of the AtCesA3 gene in Arabidopsis thaliana display intragenic complementation.

    Science.gov (United States)

    Pysh, Leonard D

    2015-09-01

    Cellulose is the most abundant biomolecule on the planet, yet the mechanism by which it is synthesized by higher plants remains largely unknown. In Arabidopsis thaliana (L.) Heynh, synthesis of cellulose in the primary cell wall requires three different cellulose synthase genes (AtCesA1, AtCesA3, and AtCesA6-related genes [AtCesA2, AtCesA5, and AtCesA6]). The multiple response expansion1 (mre1) mutant contains a hypomorphic AtCesA3 allele that results in significantly shorter, expanded roots. Crosses between mre1 and another allele of AtCesA3 (constitutive expression of VSP1, cev1) yielded an F1 with roots considerably longer and thinner than either parent, suggesting intragenic complementation. The F2 generation resulting from self-crossing these F1 showed three different root phenotypes: roots like mre1, roots like cev1, and roots like the F1. The segregation patterns of the three root phenotypes in multiple F2 and F3 generations were determined. Multiple characteristics of the roots and shoots were analyzed both qualitatively and quantitatively at different developmental stages, both on plates and on soil. The trans-heterozygous plants differed significantly from the parental mre1 and cev1 lines. The two alleles display intragenic complementation. A classic genetic interpretation of these results would suggest that cellulose synthesis requires homo-multimerization of cellulose synthase monomers. © 2015 Botanical Society of America.

  12. Morbilidad diferencial en las cesáreas anteriores: elegir entre un parto vaginal y una cesárea iterativa

    OpenAIRE

    Mozo Valdivieso, Eva Gloria

    2014-01-01

    INTRODUCCIÓN: El nacimiento después de una cesárea se ha caracterizado por cambios dramáticos en la práctica obstétrica y unas políticas restrictivas cada vez más cuestionadas. El éxito del PVDC varía entre 56%-80%, aunque la proporción de mujeres que intentan un parto vaginal es cada vez menor. Se han realizado estudios que demuestran la existencia de beneficios y daños asociados con la cesárea electiva y el parto vaginal después de cesárea. Se pretende conocer la incidencia de morbilidad en...

  13. Évaluation de l'incidence des programmes de transferts en espèces ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Les personnes qui reçoivent ces fonds doivent satisfaire à certaines conditions, comme envoyer les enfants à l'école et utiliser les services de santé de base. De récentes données laissent entendre que les transferts en espèces peuvent contribuer à une croissance favorable aux pauvres : -en servant d'outil efficace de ...

  14. [Development of specific and degenerated primers to CesA genes encoding flax (Linum usitatissimum L.) cellulose synthase].

    Science.gov (United States)

    Grushetskaia, Z E; Lemesh, V A; Khotyleva, L V

    2010-01-01

    Cellulose synthase catalytic subunit genes, CesA, have been discovered in several higher plant species, and it has been shown that the CesA gene family has multiple members. HVR2 fragment of these genes determine the class specificity of the CESA protein and its participation in the primary or secondary cell wall synthesis. The aim of this study was development of specific and degenerated primers to flax CesA gene fragments leading to obtaining the class specific HVR2 region of the gene. Two pairs of specific primers to the certain fragments of CesA-1 and CesA-6 genes and one pair of degenerated primers to HVR2 region of all flax CesA genes were developed basing on comparison of six CesA EST sequences of flax and full cDNA sequences of Arabidopsis, poplar, maize and cotton plants, obtained from GenBank. After amplification of flax cDNA, the bands of expected size were detected (201 and 300 b.p. for the CesA-1 and CesA-6, and 600 b.p. for the HVR2 region of CesA respectively). The developed markers can be used for cloning and sequencing of flax CesA genes, identifying their number in flax genome, tissue and stage specificity.

  15. [Criterion Validity of the German Version of the CES-D in the General Population].

    Science.gov (United States)

    Jahn, Rebecca; Baumgartner, Josef S; van den Nest, Miriam; Friedrich, Fabian; Alexandrowicz, Rainer W; Wancata, Johannes

    2018-04-17

    The "Center of Epidemiologic Studies - Depression scale" (CES-D) is a well-known screening tool for depression. Until now the criterion validity of the German version of the CES-D was not investigated in a sample of the adult general population. 508 study participants of the Austrian general population completed the CES-D. ICD-10 diagnoses were established by using the Schedules for Clinical Assessment in Neuropsychiatry (SCAN). Receiver Operating Characteristics (ROC) analysis was conducted. Possible gender differences were explored. Overall discriminating performance of the CES-D was sufficient (ROC-AUC 0,836). Using the traditional cut-off values of 15/16 and 21/22 respectively the sensitivity was 43.2 % and 32.4 %, respectively. The cut-off value developed on the basis of our sample was 9/10 with a sensitivity of 81.1 % und a specificity of 74.3 %. There were no significant gender differences. This is the first study investigating the criterion validity of the German version of the CES-D in the general population. The optimal cut-off values yielded sufficient sensitivity and specificity, comparable to the values of other screening tools. © Georg Thieme Verlag KG Stuttgart · New York.

  16. Some considerations of the energy spectrum of odd-odd deformed nuclei; Quelqes considerations sur le spectre d'energie des noyaux impair-impair deformes

    Energy Technology Data Exchange (ETDEWEB)

    Alceanu-G, Pinho de; Picard, J. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1965-07-01

    The odd-odd deformed nuclei are described as a rotator plus two odd nucleons moving in orbitals {omega}{sub p} and {omega}{sub n} of the deformed potential. We investigate the energies and wave functions of the various states of the ({omega}{sub p}, {omega}{sub n}) configurations by calculating and numerically diagonalizing the Hamiltonian matrix (with R.P.C. and residual interactions). The Gallagher-Mosskowski coupling rules ana the abnormal K equals 0 rotational bands are discussed. (authors) [French] Les noyaux impair-impairs deformes sont decrits comme un rotateur plus deux nucleons non apparies dans les orbites {omega}{sub p} et {omega}{sub n} du potentiel deforme. Nous etudions le spectre d'energie et les fonctions d'onde des configurations ({omega}{sub p}, {omega}{sub n}) en tenant compte de l'interaction particule-rotation et de la force residuelle entre les deux nucleons celibataires.

  17. Nuclear magnetic resonance of iron-57 nuclei in local fields in yttrium and iron garnets; Resonance magnetique nucleaire des noyaux du fer 57 dans les champs locaux du grenat d'yttrium et de fer

    Energy Technology Data Exchange (ETDEWEB)

    Robert, C. [Commissariat a l' Energie Atomique, Saclay (France).Centre d' Etudes Nucleaires

    1961-07-01

    We have demonstrated the nuclear resonance of {sup 57}Fe nuclei in the local field of each of the two magnetic sub-lattices of yttrium and iron garnets. The resonance frequencies and the relaxation times have been measured as a function of the temperature. (author) [French] Nous avons mis en evidence la resonance nucleaire des noyaux de {sup 57}Fe dans le champ local de chacun des deux sous-reseaux magnetiques du grenat d'yttrium et de fer. Les frequences de resonances et les temps de relaxation ont ete mesures en fonction de la temperature. (auteur)

  18. Analgesia postoperatoria con catéter incisional en cesáreas electivas

    OpenAIRE

    Rodríguez Morejón, María del Carmen

    2012-01-01

    La cesárea supone hoy en día una de las intervenciones quirúrgicas obstétricas más frecuentes. A esto se añade que la cesárea está dentro del grupo de intervenciones con un dolor postoperatorio de intensidad elevada y que ninguna opción analgésica ha demostrado ser la mejor. Por ello se diseñó un estudio de intervención, prospectivo, aleatorizado, no ciego, para comparar la eficacia, en el control del dolor tras la cesárea (medido mediante Escala Visual Analógica), de la analgesia incision...

  19. Factor structure of the CES-D and measurement invariance across gender in Mainland Chinese adolescents.

    Science.gov (United States)

    Wang, Mengcheng; Armour, Cherie; Wu, Yan; Ren, Fen; Zhu, Xiongzhao; Yao, Shuqiao

    2013-09-01

    The primary aim was to examine the depressive symptom structure of Mainland China adolescents using the Center for Epidemiologic Studies Depression Scale (CES-D). Exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were simultaneously conducted to determine the structure of the CES-D in a large scale, representative adolescent samples recruited from Mainland China. Multigroup CFA (N = 5059, 48% boys, mean = 16.55±1.06) was utilized to test the factorial invariance of the depressive symptom structure, which was generated by EFA and confirmed by CFA across gender. The CES-D can be interpreted in terms of 3 symptom dimensions. Additionally, factorial invariance of the new proposed model across gender was supported at all assuming different degrees of invariance. Mainland Chinese adolescents have specific depressive symptom structure, which is consistent across gender. © 2013 Wiley Periodicals, Inc.

  20. Cameroun

    African Journals Online (AJOL)

    SARAH

    30 juin 2014 ... yohimbe, Rauvolfia vomitoria, Solanum lycopersicum,. Solanum nigrum, Solanum tuberosum, Voacanga africana, Voacanga thouarsii, Zingiber officinale. Les espèces exotiques sont : Acanthus montanus,. Ageratum conyzoides, Aloe vera, Allium sativum,. Apium graveolens, Amaranthus hybridus, Ananas.

  1. Challenges in assessing depressive symptoms in Fiji: A psychometric evaluation of the CES-D.

    Science.gov (United States)

    Opoliner, April; Blacker, Deborah; Fitzmaurice, Garrett; Becker, Anne

    2014-06-01

    The CES-D is a commonly used self-report assessment for depressive symptomatology. However, its psychometric properties have not been evaluated in Fiji. This study aims to evaluate the reliability and validity of English language and Fijian vernacular versions in ethnic Fijian adolescent schoolgirls. As part of the HEALTHY Fiji study, ethnic Fijian female adolescents (N = 523) completed the CES-D. Participants selected to respond in English or the local vernacular. Reliability (internal consistency, item-total score correlation, and test-retest estimates), validity (associations with other proxies for depression) and factor structure were assessed. Evaluations considered differences between language versions. In this sample, the CES-D had a Cronbach's α of 0.81 and item-total score correlation coefficients ranged between 0.2 and 0.63. One week test-retest reliability (ICC(2)) was 0.57. CES-D scores were higher among individuals who endorsed feelings of depression and suicidality compared to those who did not. ROC analyses of the CES-D versus binary depression and suicidality variables produced AUCs around 0.70 and did not support a discrete cut-off for significant disturbance. Findings were similar across the two language groups. The CES-D has acceptable reliability and validity among ethnic Fijian female adolescents in English and in the Fijian vernacular language. Findings support its utility as a dimensional measure for depressive symptomatology in this study population. Further examination of its clinical utility for case finding for depression in Fijian school-based and community populations is warranted. © The Author(s) 2013.

  2. Contribution à l'inventaire et à la domestication des espèces ...

    African Journals Online (AJOL)

    SARAH

    30 juin 2014 ... de nombreuses espèces végétales ont disparu ou se sont raréfiées, essentiellement ..... Tableau 4 : Durée de séjour en pépinière des essences en fonction du matériel végétal utilisé. Durée de séjour. Durée courte (3-6 ... conscience sur l'importance socioéconomique de ces produits et les désagréments ...

  3. Efedrina y Fenilefrina: Efectos hemodinámicos en cesáreas electivas

    OpenAIRE

    Romero Palomino, Patricia

    2017-01-01

    El objetivo de este estudio es comparar el efecto de bolos de efedrina y fenilefrina sobre el gasto cardíaco en la hipotensión que se produce tras la realización de anestesia espinal en cesáreas programadas. La anestesia espinal es la técnica de elección para cesáreas y conlleva disminución de las resistencias vasculares periféricas, del retorno venoso y un aumento compensador del gasto cardíaco que asociados a las peculiaridades del embarazo a término hacen que se convierta en un periodo ...

  4. Validating a shortened depression scale (10 item CES-D among HIV-positive people in British Columbia, Canada.

    Directory of Open Access Journals (Sweden)

    Wendy Zhang

    Full Text Available OBJECTIVE: To establish the reliability and validity of a shortened (10-item depression scale used among HIV-positive patients enrolled in the Drug Treatment Program in British Columbia, Canada. METHODS: The 10-item CES-D (Center for Epidemiologic Studies Depression Scale was examined among 563 participants who initiated antiretroviral therapy (ART between August 1, 1996 and June 30, 2002. Internal consistency of the scale was measured by Cronbach's alpha. Using the original CES-D 20 as primary criteria, comparisons were made using the Kappa statistic. Predictive accuracy of CES-D 10 was assessed by calculating sensitivity, specificity, positive predictive values and negative predictive values. Factor analysis was also performed to determine if the CES-D 10 contained the same factors of positive and negative affect found in the original development of the CES-D. RESULTS: The correlation between the original and the shortened scale is very high (Spearman correlation coefficient  =0.97 (P<0.001. Internal consistency reliability coefficients of the CES-D 10 were satisfactory (Cronbach α=0.88. The CES-D 10 showed comparable accuracy to the original CES-D 20 in classifying participants with depressive symptoms (Kappa=0.82, P<0.001. Sensitivity of CES-D 10 was 91%; specificity was 92%; and positive predictive value was 92%. Factor analysis demonstrates that CES-D 10 contains the same underlying factors of positive and negative affect found in the original development of the CES-D 20. CONCLUSION: The 10-item CES-D is a comparable tool to measure depressive symptoms among HIV-positive research participants.

  5. Lutte contre les zoonoses helminthiques et élimination de ces ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Les infections par des parasites du genre Schistosoma et la douve du foie peuvent entraîner des maladies graves, notamment l'anémie, un retard de croissance, la malnutrition, ainsi que le cancer du foie. Les parasites qui causent ces maladies ont des cycles de vie complexes. Ils se transmettent entre humains, animaux ...

  6. 241 Culture de trois espèces fongiques sauvages comestibles du ...

    African Journals Online (AJOL)

    hp

    inflorescences mâles de palmier de palmier à huile trempés dans l'eau de distribution ... agricole par la mise en culture d'espèces fongiques comestibles par des ..... mycélienne est en rapport avec le rendement ou l'efficacité biologique.

  7. Ces-VP: consultation expert system for vector programming of nuclear codes

    International Nuclear Information System (INIS)

    Fujisaki, Masahide; Makino, Mitsuhiro; Ishiguro, Misako

    1988-08-01

    Ces-VP is a prototype rule-based expert system for consulting the vector programming, based on the knowledge of vectorization of nuclear codes at JAERI during these 10 years. Experts in vectorization can restructure nuclear codes with high performance on vector processors, since they have know-how for choosing the best technique among a lot of techniques that were acquired from the experience of vectorization in the past. Frequency in trial and error will be reduced if a beginner can easily use the know-how of experts. In this report, at first the contents of Ces-VP and its intention are shown. Then, the method for acquiring the know-how of vectorization and the method for making rules from the know-how are described. The outline of Ces-VP implemented on Fujitsu expert tool ESHELL is described. Finally, the availability of Ces-VP is evaluated from the data gathered from practical use and its present problems are discussed. (author)

  8. Noyaux et radioactivité une introduction à la physique des particules et à la physique nucléaire

    CERN Document Server

    Debu, Pascal

    2017-01-01

    Nées au début du XXe siècle, la physique nucléaire et la physique des particules ont bouleversé notre vision du monde et révolutionné la société par leurs innombrables applications : l'énergie nucléaire et l'utilisation des rayonnements pour la médecine et les sciences des matériaux en sont des exemples emblématiques. L'objectif de cet ouvrage est de permettre au lecteur d'appréhender les phénomènes nucléaires et la physique des hautes énergies, d'illustrer les retombées de la physique fondamentale dans la société, et d'éveiller ainsi la curiosité et l'intérêt pour ces disciplines. Le premier chapitre rappelle les notions indispensables de mécanique quantique et de relativité restreinte. Il se termine par une introduction sur l'antimatière et ses applications. Le deuxième chapitre aborde la physique des particules par la description des constituants de la matière et des lois qui gouvernent leurs interactions. L'interaction faible est l'occasion de développements sur les notions...

  9. Regard sur Le Temps des grâces, de Dominique Marchais A look at Le temps des grâces by Dominique Marchais Una mirada a Le temps des grâces, de Dominique Marchais

    Directory of Open Access Journals (Sweden)

    Christèle Dondeyne

    2013-03-01

    Full Text Available Le documentaire Le Temps des grâces de Dominique Marchais s’attache aux regards que des agriculteurs de différentes générations portent sur leur activité et aux analyses d’agronomes et d’économistes sur l’agriculture française. Il donne à voir quelques unes des multiples façons dont le travail agricole modèle les paysages et les écosystèmes et souligne le poids des politiques publiques dans ces orientations. Son constat global laisse plus de place à une industrialisation de l’agriculture qui conduit à l’uniformisation des produits et à la mort des sols qu’à des alternatives viables pour les écosystèmes. La confrontation de ce documentaire avec des travaux majeurs de la sociologie sur ce thème produit une impression de décalage et renvoie à des réflexions théoriques et méthodologiques.Dominique Marchais’ documentary, Le Temps des grâces, deals with different farmer generations’ vision of their work. It also provides an agronomic and economic analysis of French farming, showing some of the many different ways in which agricultural activity shapes landscape and ecosystems, while stressing the responsibility of public policy in such processes. The general observation highlights the growing industrialisation of agriculture, leading more to the uniformisation of products and destruction of soil fertility than to ecologically viable alternatives. When compared with major sociological studies in this area, the documentary highlights certain deviations while referring to theoretical and methodological thinking in this domain.En su documental Le Temps des grâces, Dominique Marchais se interesa en la visión que agricultores de diferentes generaciones tienen de su quehacer y en algunos análisis de la agricultura francesa realizados por agrónomos y economistas. Su trabajo permite vislumbrar algunas de las múltiples formas en que el trabajo agrícola modela los paisajes y los ecosistemas, y hace hincapié en el

  10. Evaluating Short-Form Versions of the CES-D for Measuring Depressive Symptoms among Immigrants from Mexico

    Science.gov (United States)

    Grzywacz, Joseph G.; Hovey, Joseph D.; Seligman, Laura D.; Arcury, Thomas A.; Quandt, Sara A.

    2006-01-01

    This article examines the feasibility of using a short-form version of the Center for Epidemiologic Studies-Depression Scale (CES-D) in community mental health research with Mexican immigrants. Several features of three published short versions of the CES-D were examined using data combined from seven diverse Mexican immigrant samples from across…

  11. Some Characterizations of the Cobb-Douglas and CES Production Functions in Microeconomics

    Directory of Open Access Journals (Sweden)

    Xiaoshu Wang

    2013-01-01

    Full Text Available It is well known that the study of the shape and the properties of the production possibility frontier is a subject of great interest in economic analysis. Vîlcu (Vîlcu, 2011 proved that the generalized Cobb-Douglas production function has constant return to scale if and only if the corresponding hypersurface is developable. Later on, the authors A. D. Vîlcu and G. E. Vîlcu, 2011 extended this result to the case of CES production function. Both results establish an interesting link between some fundamental notions in the theory of production functions and the differential geometry of hypersurfaces in Euclidean spaces. In this paper, we give some characterizations of minimal generalized Cobb-Douglas and CES production hypersurfaces in Euclidean spaces.

  12. Culture de trois espèces fongiques sauvages comestibles du ...

    African Journals Online (AJOL)

    Des essais de culture de trois souches de trois espèces de champignons lignicoles comestibles: Pleurotus cystidiosus O.K. Miller, Lentinus cladopus Lév. et Marasmius buzungolo Singer isolées sur milieu gélosé PDA et dont les mycéliums ont été repiqués sur substrats de semis de grains de maïs et de sciure de bois ont ...

  13. RSS (http://www.iaees.org/publications/journals/ces/rss.xml

    Directory of Open Access Journals (Sweden)

    Computational Ecology and Software (ISSN 2220-721X

    Full Text Available Computational Ecology and Software ISSN 2220-721X URL: http://www.iaees.org/publications/journals/ces/online-version.asp RSS: http://www.iaees.org/publications/journals/ces/rss.xml E-mail: ces@iaees.org Editor-in-Chief: WenJun Zhang Aims and Scope COMPUTATIONAL ECOLOGY AND SOFTWARE (ISSN 2220-721X is an open access, peer-reviewed online journal that considers scientific articles in all different areas of computational ecology. It is the transactions of the International Society of Computational Ecology. The journal is concerned with the ecological researches, constructions and applications of theories and methods of computational sciences including computational mathematics, computational statistics and computer science. It features the simulation, approximation, prediction, recognition, and classification of ecological issues. Intensive computation is one of the major stresses of the journal. The journal welcomes research articles, short communications, review articles, perspectives, and book reviews. The journal also supports the activities of the International Society of Computational Ecology. The topics to be covered by CES include, but are not limited to: •Computation intensive methods, numerical and optimization methods, differential and difference equation modeling and simulation, prediction, recognition, classification, statistical computation (Bayesian computing, randomization, bootstrapping, Monte Carlo techniques, stochastic process, etc., agent-based modeling, individual-based modeling, artificial neural networks, knowledge based systems, machine learning, genetic algorithms, data exploration, network analysis and computation, databases, ecological modeling and computation using Geographical Information Systems, satellite imagery, and other computation intensive theories and methods. •Artificial ecosystems, artificial life, complexity of ecosystems and virtual reality. •The development, evaluation and validation of software and

  14. Computational Ecology and Software (http://www.iaees.org/publications/journals/ces/online-version.asp

    Directory of Open Access Journals (Sweden)

    ces@iaees.org

    Full Text Available Computational Ecology and Software ISSN 2220-721X URL: http://www.iaees.org/publications/journals/ces/online-version.asp RSS: http://www.iaees.org/publications/journals/ces/rss.xml E-mail: ces@iaees.org Editor-in-Chief: WenJun Zhang Aims and Scope COMPUTATIONAL ECOLOGY AND SOFTWARE (ISSN 2220-721X is an open access, peer-reviewed online journal that considers scientific articles in all different areas of computational ecology. It is the transactions of the International Society of Computational Ecology. The journal is concerned with the ecological researches, constructions and applications of theories and methods of computational sciences including computational mathematics, computational statistics and computer science. It features the simulation, approximation, prediction, recognition, and classification of ecological issues. Intensive computation is one of the major stresses of the journal. The journal welcomes research articles, short communications, review articles, perspectives, and book reviews. The journal also supports the activities of the International Society of Computational Ecology. The topics to be covered by CES include, but are not limited to: •Computation intensive methods, numerical and optimization methods, differential and difference equation modeling and simulation, prediction, recognition, classification, statistical computation (Bayesian computing, randomization, bootstrapping, Monte Carlo techniques, stochastic process, etc., agent-based modeling, individual-based modeling, artificial neural networks, knowledge based systems, machine learning, genetic algorithms, data exploration, network analysis and computation, databases, ecological modeling and computation using Geographical Information Systems, satellite imagery, and other computation intensive theories and methods. •Artificial ecosystems, artificial life, complexity of ecosystems and virtual reality. •The development, evaluation and validation of software and

  15. Efecto del Hierro en el Desarrollo de las Raíces de las Plantas

    Directory of Open Access Journals (Sweden)

    Correa Velásquez Jairo

    1964-08-01

    Full Text Available Se investigó el efecto del hierro en el desarrollo de las raíces del cacao, el café y el fríjol. También se observó la velocidad de recuperación de la clorofila en plantas cloróticas de cacao y café, al agregarles cantidades crecientes de hierro, y el efecto de dicha recuperación sobre el desarrollo radical. Además, se estudió el grado de absorción y movilización de Fe50 en plantas de cacao, y el efecto de distintas dosis de hierro en el crecimiento de raíces aisladas cacao, café y fríjol. Las plantas fueron cultivadas en el invernadero en solución HoagIand N° 2 sin Fe y las raíces para cultivo se obtuvieron de semillas germinadas en el laboratorio. Se usaron plantas de cacao del clon uf 668 de 3 meses y de café (variedad caturra con la misma edad. El hierro radiactivo utilizado fue en forma de cloruro (Fe59 cl 3 y el agregado a la solución o al follaje, en forma de quelato (Fe E. D. T. A.. Las adiciones de este elemento se hicieron cuando las plantas mostraban síntomas característicos de su deficiencia. Hubo una recuperación casi total de la clorosis y tanto el volumen como la longitud radical aumentaron con las aplicaciones crecientes de hierro, aunque la longitud relativa de los tallos mostró una tendencia decreciente. En las hojas de cacao se presentó una acumulación del Fe y su movilización hacia los demás órganos de la planta fue lenta y en proporción reducida en relación con el total absorbido. Igual cosa sucedió con el Fe50 suministrado a las raíces. No se pudieron observar los efectos del Fe en el crecimiento de raíces aisladas de cacao, café y fríjol, pues el desarrollo fue muy reducido, debido a que la rápida oxidación de los tejidos (al separar aquéllas del resto de la planta redujo la viabilidad a unos pocos días.

  16. Biomasa de raíces en un bosque templado con y sin manejo forestal en Hidalgo, México

    OpenAIRE

    Pavón, Numa P.; Moreno, Claudia E.; Ramírez-Bautista, Aurelio

    2012-01-01

    Las raíces son buenos indicadores funcionales del ecosistema ya que constituyen gran parte de la biomasa viva del suelo y ejercen un control sobre los procesos de pedogénesis, la producción de materia orgánica y la dinámica de los nutrientes. En este trabajo se comparó la biomasa de raíces gruesas y finas entre un bosque conservado y un bosque con manejo forestal de corte selectivo. La biomasa promedio de raíces no difirió significativamente entre sitios (P = 0.185). La biomasa en el bosque c...

  17. Koordinasi Optimal Capacitive Energy Storage (CES dan Kontroler PID Menggunakan Differential Evolution Algorithm (DEA pada Sistem Tenaga Listrik

    Directory of Open Access Journals (Sweden)

    Akbar Swandaru

    2012-09-01

    Full Text Available Peningkatan suplai daya listrik diperlukan untuk memenuhi kebutuhan daya listrik. Generator cenderung beroperasi dalam beban penuh.Hal ini berpengaruh pada keamanan generator dalam operasi sistem tenaga listrik.Salah satu masalah adalah osilasi frekuensi.Bila perubahan beban terjadi, kontroler diperlukan untuk meredam osilasi frekuensi ini.Pada tugas akhir ini diusulkan sebuah koordinasi antara Kontroler Capacitive Energy Storage (CES dan Kontroler PID. CES disini berfungsi untuk membantu kinerja Governor agar meredam osilasi frekuensi dengan cepat. Kontroler CES ini digunakan bersama dengan PID controller yang dioptimalkan dengan  Differential Evolution Algorithm (DEA.

  18. Study by {alpha}-particle scattering, of the collective states of closed shell nuclei with 28 neutrons, 28 and 50 protons; Etude des etats a caractere collectif des noyaux au voisinage des couches fermees par diffusion inelastique des particules {alpha}

    Energy Technology Data Exchange (ETDEWEB)

    Bruge, G [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1967-01-01

    This report gives the results from a systematic study by 44 MeV {alpha} particle scattering on the collective states of closed shell nuclei with 28 neutrons, 28 and 50 protons especially in the energy region corresponding to the two phonon vibrational triplet. The nuclei studied are: {sup 46}Ti, {sup 48}Ti, {sup 50}Ti, {sup 52}Cr, {sup 54}Fe, {sup 56}Fe, {sup 58}Fe, {sup 58}Ni, {sup 60}Ni, {sup 62}Ni, {sup 64}Ni, {sup 112}Sn, {sup 114}Sn, {sup 116}Sn, {sup 118}Sn, {sup 120}Sn, {sup 122}Sn and {sup 124}Sn. The theoretical analysis has been made with the Austern and Blair model using a phase shift analysis of the elastic scattering. Deformation lengths {delta}{sub I} = {beta}{sub I}R and transition probabilities obtained are compared with several experimental and theoretical data. (author) [French] Ce rapport donne les resultats d'une etude systematique par diffusion de particules {alpha} de 44 MeV des etats collectifs des noyaux au voisinage des couches fermees a 28 neutrons et 28 et 50 protons, specialement dans la region correspondant au triplet vibrationnel a deux phonons. Les noyaux etudies sont: {sup 46}Ti, {sup 48}Ti, {sup 50}Ti, {sup 52}Cr, {sup 54}Fe, {sup 56}Fe, {sup 58}Fe, {sup 58}Ni, {sup 60}Ni, {sup 62}Ni, {sup 64}Ni, {sup 112}Sn, {sup 114}Sn, {sup 116}Sn, {sup 118}Sn, {sup 120}Sn, {sup 122}Sn et {sup 124}Sn. L'analyse theorique a ete faite a l'aide du modele de Austern et Blair utilisant une analyse en dephasages de la diffusion elastique. Les longueurs de deformation {delta}I = {beta}{sub I}R obtenues pour chaque niveau sont comparees a plusieurs donnees experimentales et theoriques. (auteur)

  19. Comparative study of {beta} decays and of the model of the layers for the nucleus with odd a; Etude comparee des desintegrations {beta} et du modele des couches pour les noyaux de a impair

    Energy Technology Data Exchange (ETDEWEB)

    Trocheris, M [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1953-07-01

    The systematic comparison of {beta} decays of the cores of number of odd mass with the predictions of the modal of Mrs. Mayer on spins and parities, has already been made by several authors. It is taken in the present work with more recent experimental data and with a method of classification of the {beta} transitions. A simultaneous comparison to the experience of the model of the layers and the theory of the {beta} transitions can serve to verify one and the other too. In the present work, it appeared more fruitful to try to verify the model of the layers with the help of the very established theory of the {beta} transitions. One will look to verify and perfect the models of the layers for transitions between fundamental states or isomers of the cores. (M.B.) [French] La comparaison systematique des desintegrations {beta} des noyaux de nombre de masse impair avec les predictions du modale de Mme MAYER sur les spins et les parites, a deja ete faite par plusieurs auteurs. Elle est reprise dans le present travail avec des donnees experimentales plus recentes et avec une methode de classification des transitions {beta}. Une comparaison simultanee a l'experience du modele des couches et de la theorie des transitions {beta} peut, a priori, servir a verifier egalement l'un et l'autre. Dans le present travail, il a paru plus fructueux de chercher a verifier le modele des couches a l'aide de la theorie bien etablie des transitions {beta}. On cherchera de verifier et de perfectionner le modele des couches pour les transitions entre etats fondamentaux ou isomeres des noyaux. (M.B.)

  20. The CES-D as a Measure of Psychological Distress Among International Students: Measurement and Structural Invariance Across Gender.

    Science.gov (United States)

    Suh, Hanna; van Nuenen, Marieke; Rice, Kenneth G

    2017-10-01

    Detecting psychological distress among international students can be challenging given diverse languages, cultural backgrounds, and lack of refined measurement properties of measures tailored to international students. Despite the challenges, ensuring that a psychological distress measure works effectively has considerable potential value for assessment purposes. The current study evaluates the measurement properties of a short 10-item version of Radloff's Center for Epidemiologic Studies Depression Scale (CES-D). Grounded in long-standing evidence on gender differences in depressive symptoms, specific attention was given to examining measurement invariance of the CES-D Short-form across women and men. Based on a large, two-cohort sample of international students ( N = 468), and through multiple analyses evaluating factor structure and measurement invariance, we derived an even briefer, seven-item single-factor form of the CES-D (CES-D Short-form International) that can be used with international students.

  1. RAÍCES: un juego serio social para revalorizar las culturas originarias

    OpenAIRE

    Nomdedeu, Luciano Julián

    2015-01-01

    En este trabajo se exponen los aspectos más destacados del proceso de creación de Raíces, un juego serio social que sirve como didáctica para la enseñanza, y busca estimular a los niños de hoy, caracterizados por el uso naturalizado de las tecnologías, a adquirir conocimiento a través de las redes sociales. La propuesta de este juego online tiene objetivos pedagógicos escondidos, objetivos que se pretende, posibiliten a los jugadores obtener un conjunto de conocimientos sobre las culturas abo...

  2. La sutura compresiva del útero en cesárea con atonía uterina

    Directory of Open Access Journals (Sweden)

    Percy Pacora

    2004-12-01

    Full Text Available Objetivo: Determinar si el empleo de la sutura compresiva del útero (técnica de B-Lynch durante la cesárea en casos de atonía uterina disminuye la pérdida sanguínea y evita la histerectomía posparto. Material y Métodos: Estudio retrospectivo de las cesáreas que cursaron con atonía uterina durante la intervención, desde el 1 de enero de 1990 al 31 de diciembre de 2003, en el Hospital San Bartolomé de Lima. El método estándar de manejo de la atonía uterina en la cesárea consiste en el masaje uterino, el empleo de agentes uterotónicos (ocitocina, prostaglandinas, ligadura de arterias uterinas/hipogástricas y la histerectomía posparto. Las variables maternas y perinatales obtenidas de las historias clínicas fueron ingresadas a una base de datos computarizado (SPSS versión 10. Resultados: Se identificó 46 casos: en 30 se empleó la técnica B-Lynch y en 16 el método estándar. No hubo diferencias en las características maternas entre ambos grupos. El grupo de B-Lynch presentó subjetivamente menor perdida sanguínea, recibió menor número de unidades de sangre transfundida y presentó significativo menor riesgo de histerectomía posparto comparado con el método estándar (promedio ± DE: 1144,4±311,7 mL vs 1666,9±794,4 mL, p<0,05; 0,36±0,66 vs 2,90±3,64, p<0,05; y OR 0,08, IC95% 0,01-0,45, p<0,01, respectivamente. Conclusiones: La sutura compresiva del útero durante la cesárea en la atonía uterina parece reducir el sangrado vaginal, la transfusión sanguínea y el empleo de la histerectomía comparado con el método estándar.

  3. Perfil dos partos cesáreos em um hospital universitário

    Directory of Open Access Journals (Sweden)

    Mariana Costa Hoffmeister

    2015-02-01

    Full Text Available Introdução: A proporção de partos cesarianos no Brasil está muito além da preconizada pela Organização Mundial da Saúde, o mesmo ocorrendoem um Hospital Universitário de Porto Alegre, sul do Brasil. A taxa de cesáreas é considerada um indicador poderoso na avaliação da qualidade da assistência perinatal. Nosso objetivo foi analisar o padrão dos partos cesarianos e normais em um hospital universitário no período de2004 a 2012 quanto à média de permanência, faixa etária da parturiente, taxa de infecção relacionada ao parto, tipo de pagador e idade gestacional. Métodos: Estudo de coorte retrospectivo, observacional, com dados coletados no Sistema de Indicadores de Gestão (IG de um Hospital Universitário, abrangendo o período de2004 a 2012. Resultados: A taxa de cesárea no hospital universitário nos anos analisados foi em média 33,21%. Em relação às cesarianas realizadas nesta instituição durante o período em estudo, observou-se que: há uma maior prevalência de cesáreas em mulheres acima de 40 anos, ocorreu um crescimento de partos cesarianos pré-termo, a média de permanência e taxa de infecção foram superiores em relação às mulheres submetidas ao parto vaginal, e houve predomínio de cesarianas na saúde suplementar quando comparada ao Sistema Único de Saúde. Conclusões: As elevadas taxas de cesárea no hospital universitário, embora acima do recomendado pela OMS, são justificadas por se tratar de um hospital terciário e estão em conformidade com o padrão observado no país.

  4. Variability in depression prevalence in early rheumatoid arthritis: a comparison of the CES-D and HAD-D Scales

    OpenAIRE

    Emery Paul; Cox Sally; Tennant Alan; Pallant Julie F; Covic Tanya; Conaghan Philip G

    2009-01-01

    Abstract Background Depression is common in rheumatoid arthritis (RA), however reported prevalence varies considerably. Two frequently used instruments to identify depression are the Center for Epidemiological Studies Depression (CES-D) scale, and the Hospital Anxiety and Depression Scale (HADS). The objectives of this study were to test if the CES-D and HADS-D (a) satisfy current modern psychometric standards for unidimensional measurement in an early RA sample; (b) measure the same construc...

  5. Novel Structural and Functional Motifs in cellulose synthase (CesA Genes of Bread Wheat (Triticum aestivum, L..

    Directory of Open Access Journals (Sweden)

    Simerjeet Kaur

    Full Text Available Cellulose is the primary determinant of mechanical strength in plant tissues. Late-season lodging is inversely related to the amount of cellulose in a unit length of the stem. Wheat is the most widely grown of all the crops globally, yet information on its CesA gene family is limited. We have identified 22 CesA genes from bread wheat, which include homoeologs from each of the three genomes, and named them as TaCesAXA, TaCesAXB or TaCesAXD, where X denotes the gene number and the last suffix stands for the respective genome. Sequence analyses of the CESA proteins from wheat and their orthologs from barley, maize, rice, and several dicot species (Arabidopsis, beet, cotton, poplar, potato, rose gum and soybean revealed motifs unique to monocots (Poales or dicots. Novel structural motifs CQIC and SVICEXWFA were identified, which distinguished the CESAs involved in the formation of primary and secondary cell wall (PCW and SCW in all the species. We also identified several new motifs specific to monocots or dicots. The conserved motifs identified in this study possibly play functional roles specific to PCW or SCW formation. The new insights from this study advance our knowledge about the structure, function and evolution of the CesA family in plants in general and wheat in particular. This information will be useful in improving culm strength to reduce lodging or alter wall composition to improve biofuel production.

  6. Altered Expression of TFF-1 and CES-2 in Barrett's Esophagus and Associated Adenocarcinomas

    Directory of Open Access Journals (Sweden)

    Charles A. Fox

    2005-04-01

    Full Text Available Identification of biomarkers to recognize individuals with Barrett's esophagus (BE predisposed to develop malignancy is currently a pressing issue. We utilized gene expression profiling to compare molecular signatures of normal esophagus and stomach, BE, and adenocarcinoma (AC to identify such potential biomarkers. Over 22,000 genes were analyzed by oligonucleotide microarrays on 38 unique RNA. Unsupervised and supervised clusterings were performed on a subset of 2849 genes that varied most significantly across the specimens. Unsupervised clustering identified two discernable molecular BE profiles, one of which was similar to normal gastric tissue (“BE1”, and another that was shared by several of the AC specimens (“BE2”. The BE1 profile included expression of several genes that have been described as tumor-suppressor genes, most notably trefoil factor 1 (TFF-1. The BE2 profile included expression of genes previously found overexpressed in cancers, such as carboxylesterase-2 (CES-2. IHC demonstrated the loss of TFF-1 late in the progression of BE to AC. It also revealed CES-2 as being upregulated in AC documented to have arisen in the presence of BE. These potential biomarkers, as well as the relative expression of genes from BE1 versus those from BE2, may be validated in the future to aid in risk stratification and guide treatment protocols in patients with BE and associated AC.

  7. Pragmatic fully 3D image reconstruction for the MiCES mouse imaging PET scanner

    International Nuclear Information System (INIS)

    Lee, Kisung; Kinahan, Paul E; Fessler, Jeffrey A; Miyaoka, Robert S; Janes, Marie; Lewellen, Tom K

    2004-01-01

    We present a pragmatic approach to image reconstruction for data from the micro crystal elements system (MiCES) fully 3D mouse imaging positron emission tomography (PET) scanner under construction at the University of Washington. Our approach is modelled on fully 3D image reconstruction used in clinical PET scanners, which is based on Fourier rebinning (FORE) followed by 2D iterative image reconstruction using ordered-subsets expectation-maximization (OSEM). The use of iterative methods allows modelling of physical effects (e.g., statistical noise, detector blurring, attenuation, etc), while FORE accelerates the reconstruction process by reducing the fully 3D data to a stacked set of independent 2D sinograms. Previous investigations have indicated that non-stationary detector point-spread response effects, which are typically ignored for clinical imaging, significantly impact image quality for the MiCES scanner geometry. To model the effect of non-stationary detector blurring (DB) in the FORE+OSEM(DB) algorithm, we have added a factorized system matrix to the ASPIRE reconstruction library. Initial results indicate that the proposed approach produces an improvement in resolution without an undue increase in noise and without a significant increase in the computational burden. The impact on task performance, however, remains to be evaluated

  8. The Center for Epidemiologic Studies Depression Scale (CES-D: Is It Suitable for Use with Older Adults?

    Directory of Open Access Journals (Sweden)

    Górkiewicz Maciej

    2015-12-01

    Full Text Available With the aim of verifying the suitability of the CES-D scale for use in long-term care institutions for older adults, the CES-D questionnaire was used to collect patient-reported assessments, and two well-known psychometric instruments – the Hospital Anxiety and Depression Scale (HADS and the Barthel Index of Abilities of Daily Living – were used to collect nurse-reported assessments, based on observations of patients’ behaviours. With regard to possible frequent cases of cognitive impairment and/or insufficient motivation to give sensible responses to CES-D questions, the patient-reported responses were collected from patients during one-on-one sessions with a nurse. The reliability, concurrent validity, and the trustworthiness of the obtained data were supported with proper values of the Cronbach’s alpha coefficient, 0.70 < alpha < 0.85, with significant correlation between CES-D and HADS-Depression, R = 0.50, p < 0.001, and with significant correlation between scores of particular CES-D items vs. final CES-D evaluations of depression, proved by significance p < 0.001 for 18 of 20 CES-D items. These findings supported the effectiveness of the one-on-one session methodology in questionnaire surveys for older adults. The postulation that cases of self-reported depression included somewhat different information about the patient than nurse-reported depression concerning the same patient was supported with the evidence that, in spite of the significant correlation between the Barthel Index and HADS-Depression, R = −0.17, p = 0.016, and in spite of the significant correlation between CES-D and HADS-Depression, the correlation between the Barthel Index and CES-D, equal to R = −0.08 was insignificant at p = 0.244. The findings of this study, considered jointly, support the valuableness of the CES-D scale for use in one-on-one surveys for older adults.

  9. ADAPTACIÓN Y VALIDACIÓN DE LA ESCALA DE CLIMA SOCIAL ESCOLAR (CES ( ADAPTATION AND VALIDATION TO THE SCALE OF SCHOOL SOCIAL CLIMATE (CES

    Directory of Open Access Journals (Sweden)

    Ortiz Clavijo Magda Sofía

    2010-08-01

    Full Text Available Resumen:El clima social escolar ha sido objeto de estudio de diversas disciplinas entre ellas: la sociología, psicología y pedagogía, dada su complejidad y multifactorialidad. El presente artículo aborda la adaptación y validación de la Escala de Clima Social Escolar (CES desarrollada originalmente por Moos & Trickett (1979, cuyo objetivo se orienta a la construcción de instrumentos fiables para el análisis de variables relacionadas con los procesos de formación en un escenario escolar. Se trata de un estudio psicométrico no experimental. La muestra la constituyen 204 estudiantes de los grados 6º, 7º, 8º, de dos Instituciones Educativas de la ciudad de Bogotá (una pública y una privada, con edades entre los 10 y 14 años. El proceso de validación se realiza mediante estudio piloto previo al diseño y análisis de reactivos cuidando aspectos semánticos y verbales y su valoración por criterio de jueces expertos. La confiabilidad se obtuvo a partir del modelo de las dos mitades, con la ecuación alternativa propuesta por Rulón alcanzando valores que oscilaron entre 0.8 y 1 para el conjunto de categorías; este índice se corrobora con el Alpha de Cronbach que alcanzó un valor de 0.9. El análisis de validez de contenido se realizó a través del criterio de siete jueces expertos, encontrándose un nivel de acuerdo inter jueces del 95% al ubicar los ítems en el dominio conceptual que les correspondía y los índices de concordancia de Kappa alcanzaron valores de 0.74.Abstract:The School social climate has been object study by various disciplines including: The sociology, psychology and pedagogy, given its complexity and multifactorial nature. This article discusses the adaptation and validation of School Social Climate Scale (CES originally developed by Moos & Trickett (1979, whose objective is oriented to the construction of reliable tools for the analysis of variables related with formation process in a school setting. This is

  10. Welfare Effects of Tax and Price Changes and the CES-UT Utility Function

    DEFF Research Database (Denmark)

    Munk, Knud Jørgen

    Dixit's 1975 paper "Welfare Effects of Tax and Price Changes" constitutes a seminal contribution to the theory of tax reform within a second-best general equilibrium framework. The present paper clarifies ambiguities with respect to normalisation which has led to misinterpretation of some of Dixit......'s analytical results. It proves that a marginal tax reform starting from a proportional tax system will improve social welfare if it increases the supply of labour, whatever the rule of normalisation adopted. In models which impose additive separability between consumption and leisure in household preferences...... elasticities can be derived from the parameters of the CES-UT and how it may be used for applied tax reform analysis...

  11. Relations entre la diversité et la biomasse aérienne des espèces ...

    African Journals Online (AJOL)

    En Afrique sub-saharienne, peu d'études ont mis la lumière sur les relations éventuelles entre la biomasse végétale et la diversité biologique dans ces systèmes. La présente étude a permis de tester ces relations dans des agroforêts à cacao de Lakota en Côte d'Ivoire. Des cacaoyères et des forêts ont été inventoriées ...

  12. Variability in depression prevalence in early rheumatoid arthritis: a comparison of the CES-D and HAD-D Scales

    Directory of Open Access Journals (Sweden)

    Emery Paul

    2009-02-01

    Full Text Available Abstract Background Depression is common in rheumatoid arthritis (RA, however reported prevalence varies considerably. Two frequently used instruments to identify depression are the Center for Epidemiological Studies Depression (CES-D scale, and the Hospital Anxiety and Depression Scale (HADS. The objectives of this study were to test if the CES-D and HADS-D (a satisfy current modern psychometric standards for unidimensional measurement in an early RA sample; (b measure the same construct (i.e. depression; and (c identify similar levels of depression. Methods Data from the two scales completed by patients with early RA were fitted to the Rasch measurement model to show that (a each scale satisfies the criteria of fit to the model, including strict unidimensionality; (b that the scales can be co-calibrated onto a single underlying continuum of depression and to (c examine the location of the cut points on the underlying continuum as indication of the prevalence of depression. Results Ninety-two patients with early RA (62% female; mean age = 56.3, SD = 13.7 gave 141 sets of paired CES-D and HAD-D data. Fit of the data from the CES-D was found to be poor, and the scale had to be reduced to 13 items to satisfy Rasch measurement criteria whereas the HADS-D met model expectations from the outset. The 20 items combined (CES-D13 and HADS-D satisfied Rasch model expectations. The CES-D gave a much higher prevalence of depression than the HADS-D. Conclusion The CES-D in its present form is unsuitable for use in patients with early RA, and needs to be reduced to a 13-item scale. The HADS-D is valid for early RA and the two scales measure the same underlying construct but their cut points lead to different estimates of the level of depression. Revised cut points on the CES-D13 provide comparative prevalence rates.

  13. Variability in depression prevalence in early rheumatoid arthritis: a comparison of the CES-D and HAD-D Scales

    Science.gov (United States)

    Covic, Tanya; Pallant, Julie F; Tennant, Alan; Cox, Sally; Emery, Paul; Conaghan, Philip G

    2009-01-01

    Background Depression is common in rheumatoid arthritis (RA), however reported prevalence varies considerably. Two frequently used instruments to identify depression are the Center for Epidemiological Studies Depression (CES-D) scale, and the Hospital Anxiety and Depression Scale (HADS). The objectives of this study were to test if the CES-D and HADS-D (a) satisfy current modern psychometric standards for unidimensional measurement in an early RA sample; (b) measure the same construct (i.e. depression); and (c) identify similar levels of depression. Methods Data from the two scales completed by patients with early RA were fitted to the Rasch measurement model to show that (a) each scale satisfies the criteria of fit to the model, including strict unidimensionality; (b) that the scales can be co-calibrated onto a single underlying continuum of depression and to (c) examine the location of the cut points on the underlying continuum as indication of the prevalence of depression. Results Ninety-two patients with early RA (62% female; mean age = 56.3, SD = 13.7) gave 141 sets of paired CES-D and HAD-D data. Fit of the data from the CES-D was found to be poor, and the scale had to be reduced to 13 items to satisfy Rasch measurement criteria whereas the HADS-D met model expectations from the outset. The 20 items combined (CES-D13 and HADS-D) satisfied Rasch model expectations. The CES-D gave a much higher prevalence of depression than the HADS-D. Conclusion The CES-D in its present form is unsuitable for use in patients with early RA, and needs to be reduced to a 13-item scale. The HADS-D is valid for early RA and the two scales measure the same underlying construct but their cut points lead to different estimates of the level of depression. Revised cut points on the CES-D13 provide comparative prevalence rates. PMID:19200388

  14. Capital-labour-energy substitution in a nested CES framework: A replication and update of Kemfert (1998)

    DEFF Research Database (Denmark)

    Henningsen, Arne; Henningsen, Geraldine; van der Werf, Edwin

    2018-01-01

    ) (‘Estimated substitution elasticities of a nested CES production function approach for Germany’, Energy Economics, 20, 249–264). We first use the data and software reported in that article and compare our results with those reported in the original study. We then test the same data and a new, more recent......The ease with which firms can substitute away from energy to other inputs is an important determining factor in the costs of climate change mitigation policies. Climate policy simulation models usually represent this substitutability by using the Constant Elasticity of Substitution (CES) function...

  15. The Intensity of using production factors in Romania. Estimates from Cobb-Douglas and CES Models

    Directory of Open Access Journals (Sweden)

    Gheorghe Zaman

    2007-12-01

    Full Text Available The production function explains the mechanism through which inputs are changed into outputs and the partial efficiency of labour and capital. It also allows for understanding the elasticity of substitution, which measures the percentage change in factor proportions due to a percentage change in the marginal rate of technical substitution. In this research we have used aggregate production functions of Cobb-Douglas type in different time-series and cross-section analysis of Romania’s economic growth from the standpoint of the intensity of using capital and labour factors, as determinant elements for the level of production and GDP. We have also applied the two factor Constant Elasticity of Substitution (CES production function, which is considered to be the generalised form of the Cobb-Douglas function. Using the available statistical data regarding Romania’s economy in the 1990-2005 period, we have performed time-series and cross-section analysis based on the aggregated production functions at the national level.

  16. Socialdemocracia y capital: las raíces neoclásicas del modelo sueco

    Directory of Open Access Journals (Sweden)

    Mario del Rosal Crespo

    2016-05-01

    Full Text Available La socialdemocracia ha tenido en el Modelo Sueco su referente por antonomasia. Sin embargo, las raíces teóricas de esta experiencia histórica, lejos de implementar los principios típicos del keynesianismo, se asentaron sobre unas bases de marcado carácter neoclásico. A través del conocido como Modelo Rehn-Meidner, posteriormente afianzado por el llamado Modelo EFO, la socialdemocracia sueca estableció un marco de política fiscal y monetaria restrictiva en el que se desarrolló una política salarial solidaria cimentada en un poderoso sindicalismo y un sólido sistema corporativista de negociación colectiva centralizada. Así, mediante la paulatina igualación y la contención de los salarios, se buscaba estimular la productividad, mantener a raya los costes laborales y facilitar la concentración y la centralización del capital. El objetivo final era favorecer la competitividad del sector exportador sueco con el fin de asegurar una rentabilidad y un ritmo de acumulación adecuados.

  17. Introductions de nouvelles espèces de poissons dans les eaux douces tropicales : objectifs et conséquences

    Directory of Open Access Journals (Sweden)

    LÉVÊQUE C.

    1997-01-01

    Full Text Available Les introductions d'espèces dans les milieux aquatiques tropicaux ont d'abord eu pour motivation de développer la pêche sportive pour les émigrants européens. Actuellement, les principaux objectifs sont d'améliorer la pêche artisanale locale et de développer l'aquaculture. L'introduction de poissons pélagiques de la famille des clupéidés dans divers lacs naturels ou de barrage apparaît comme un succès, car elle a permis de développer la pêche de manière significative, sans dommages apparents pour la faune indigène. Par contre, l'introduction de prédateurs a toujours eu des conséquences négatives sur la faune autochtone, et divers exemples sont donnés dont la truite (Salmo trutta Linnaeus, 1758 en Australie et dans le lac Titicaca, et le capitaine (Lates niloticus Linnaeus, 1758 dans le lac Victoria. Les introductions de tilapias donnent lieu à des bilans plus mitigés, généralement positifs lorsque les cichlidés sont introduits dans des milieux pauvres en espèces autochtones, alors que des disparitions d'espèces ont été constatées pour les introductions réalisées dans les milieux déjà riches en espèces. L'exemple des lacs malgaches montre les conséquences d'introductions successives de diverses espèces sur la faune ichtyologique et la pêche.

  18. Contribution to the study of low-energy (d,p) reactions on light nuclei; Contribution a l'etude des reactions (d,p) a basse energie sur noyaux legers

    Energy Technology Data Exchange (ETDEWEB)

    Nguyen Van, S. [Commissariat a l' Energie Atomique, Grenoble (France). Centre d' Etudes Nucleaires

    1967-05-15

    This work is carried out with a view to analysing low energy (d,p) reactions on light nuclei measured at Grenoble or Algiers and suggesting a direct mechanism. The distorted wave approximation has been applied; this requires the development of programmes for the IBM 7044 computer at the 'Institut des Mathematiques Appliquees' in Grenoble. The (d,p) reactions on {sup 14}N, {sup 9}Be, {sup 22}Ne and {sup 16}O are dealt with. A calculation of the interference of the direct interaction and of resonating effects has been applied to {sup 16}O. (author) [French] Ce travail a pour but d'analyser les reactions (d,p) a basse energie sur noyaux legers, mesurees a Grenoble ou a Alger et qui suggerent un mecanisme direct. L'approximation des ondes distordues a ete appliquee, necessitant la mise au point de programmes sur l'ordinateur IBM 7044 de l'Institut des Mathematiques Appliquees de Grenoble. Des reactions (d,p) sur {sup 14}N, {sup 9}Be, {sup 22}Ne et {sup 16}O sont traitees. Un calcul de l'interference de l'interaction directe et des effets resonnants a ete applique a {sup 16}O. (auteur)

  19. Contribution to the study of low-energy (d,p) reactions on light nuclei; Contribution a l'etude des reactions (d,p) a basse energie sur noyaux legers

    Energy Technology Data Exchange (ETDEWEB)

    Nguyen Van, S [Commissariat a l' Energie Atomique, Grenoble (France). Centre d' Etudes Nucleaires

    1967-05-15

    This work is carried out with a view to analysing low energy (d,p) reactions on light nuclei measured at Grenoble or Algiers and suggesting a direct mechanism. The distorted wave approximation has been applied; this requires the development of programmes for the IBM 7044 computer at the 'Institut des Mathematiques Appliquees' in Grenoble. The (d,p) reactions on {sup 14}N, {sup 9}Be, {sup 22}Ne and {sup 16}O are dealt with. A calculation of the interference of the direct interaction and of resonating effects has been applied to {sup 16}O. (author) [French] Ce travail a pour but d'analyser les reactions (d,p) a basse energie sur noyaux legers, mesurees a Grenoble ou a Alger et qui suggerent un mecanisme direct. L'approximation des ondes distordues a ete appliquee, necessitant la mise au point de programmes sur l'ordinateur IBM 7044 de l'Institut des Mathematiques Appliquees de Grenoble. Des reactions (d,p) sur {sup 14}N, {sup 9}Be, {sup 22}Ne et {sup 16}O sont traitees. Un calcul de l'interference de l'interaction directe et des effets resonnants a ete applique a {sup 16}O. (auteur)

  20. Study of some properties of 's' neutron resonance parameters for target nuclei I = 1/2 and I = 3/2 in function of spin value J = I + 1/2 in the energy range 1 {yields} 5000 eV; Etude de quelques proprietes des parametres de resonances des neutrons ''s'' pour des noyaux cibles I = 1/2 et I = 3/2 en fonction de la valeur du spin J = I + 1/2 dans le domaine d'energie 1 eV {yields} 5000 eV

    Energy Technology Data Exchange (ETDEWEB)

    Julien, J [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1967-05-15

    Different kinds of experiments and analysis methods allowing to achieve neutron resonances parameters in the low energy range (1 eV {yields} 5000 eV) are described. A great deal of effort to improve experimental conditions and data processing in order to know the spin value J = I {+-} 1/2 has been spent. The time of flight method was used. A few target nuclei I = 3/2 and 1 = 1/2 have been studied. For I = 3/2 (Ga, As, 3r, Au) we find S{sub o} J = 2 {approx_equal} 2 S{sub o} J = 1 and S{sub o} J = 1 {approx_equal} S{sub o} J = 0 for I = 1/2 (Tm, Pt) but {sup 77}Se. Fluctuations of the total radiative width {gamma}{sub {gamma}} depend on the spin value I = I {+-} 1/2 when E1 transition, are enhanced for one of the both spin states. The magnitude of these fluctuations can be explained of the strength of E1 transitions (E{sub {gamma}} {approx} 7 MeV) is supposed to be proportional to E{sup 5}{sub {gamma}} instead of E{sup 3}{sub {gamma}}. The distribution of levels spacings against spin value J are considered and are compared to theoretical predictions. (author) [French] On decrit les differentes methodes d'analyse permettant d'obtenir les parametres des resonances de neutron dans le domaine d'energie 1 eV {yields} 5000 eV. Un effort particulier a ete fait pour connaitre la valeur du spin J = I {+-} 1/2. Les types d'experience et les analyses des donnees, developpes et ameliores pour determiner J sont decrits. Les resultats obtenus ont permis l'etude de differentes proprietes en fonction du spin J. On trouve: S{sub o} J 2 {approx_equal} 2 S{sub o} J = 1 pour les noyaux I = 3/2 etudies (Ga, As, Br, Au) et S{sub o} J = 1 {approx_equal} S{sub o} J = 0 Pour le Tm et {sup 195}Pt de spin I = 1/2. On constate que les largeurs radiatives totales {gamma}{sub {gamma}} fluctuent si des transitions E1 aux premiers etats excites sont favorisees. Ces fluctuations peuvent etre expliquees si on suppose que les intensites de ces transitions sont proportionnelles a E{sup 5}{sub {gamma

  1. Patient profiles and their relationship with the CES-D scale at the Diabetes Center for Puerto Rico.

    Science.gov (United States)

    Rodríguez, José R; Rodríguez, Rosa Janet; Disdier, Orville M

    2007-03-01

    The prevalence of diabetes mellitus in Puerto Ricans has been identified and reported as being disproportionately higher as compared to other metabolic pathologies. Recently, diabetes has been identified as the third cause of mortality in Puerto Rico (Puerto Rico Health Department, Vital Statistics Annual Report, 1999-2001). The Research Center, Education and Medical Services for Diabetes in Puerto Rico (also known as the "Centro de Diabetes para Puerto Rico" [CDPR]) is a public corporation in the island created by the government to reduce diabetes prevalence, mortality and morbidity. The CDPR offers Diabetes Self Management Educational Training Program Schools for patients (DSMETPS) island wide. The research design was an ex-post facto. As part of the process, patients are administered an extensive sociodemographic and health information questionnaire, which also includes the CES-D (a symptomatology depressive scale). This study pretends to describe the diabetic patient profiles (n=27) using information from the DSMETPS of the CDPR and explore the association with the CES-D. Variables such as patients' needs, knowledge and understanding of the condition (i.e., pathology management, type and medications utilized and exercise and nutritional patterns), patient attitudes to diabetes and their relations with the CES-D were explored. Results show a negative association, controlling for age and gender, between patients diabetic education/knowledge and CES-D score. Diabetes educators in Puerto Rico need to identify depressive symptomatology in order to prevent mental health complications in their patients since this may affect their future treatment and prognosis. An interdisciplinary team is recommended to improve the effectivity of the intervention.

  2. Quelques espèces nouvelles d’hispides de Sumatra appartenant au Musée de Leyde

    NARCIS (Netherlands)

    Gestro, R.

    1897-01-01

    Sur le point d’entreprendre l’étude des Hispides recueillies à Sumatra par M. le Doct. E. Modigliani, j’ai demandé à M. Ritsema, le savant conservateur de la collection d’insectes du Musée de Leyde, la communication de quelques espèces dans le but de faciliter mon travail. Mon aimable collègue a

  3. Efficient Overproduction of Membrane Proteins in Lactococcus lactis Requires the Cell Envelope Stress Sensor/Regulator Couple CesSR

    Science.gov (United States)

    Pinto, Joao P. C.; Kuipers, Oscar P.; Marreddy, Ravi K. R.; Poolman, Bert; Kok, Jan

    2011-01-01

    Background Membrane proteins comprise an important class of molecules whose study is largely frustrated by several intrinsic constraints, such as their hydrophobicity and added requirements for correct folding. Additionally, the complexity of the cellular mechanisms that are required to insert membrane proteins functionally in the membrane and to monitor their folding state makes it difficult to foresee the yields at which one can obtain them or to predict which would be the optimal production host for a given protein. Methods and Findings We describe a rational design approach to improve the lactic acid bacterium Lactococcus lactis as a producer of membrane proteins. Our transcriptome data shows that the two-component system CesSR, which senses cell envelope stresses of different origins, is one of the major players when L. lactis is forced to overproduce the endogenous membrane protein BcaP, a branched-chain amino acid permease. Growth of the BcaP-producing L. lactis strain and its capability to produce membrane proteins are severely hampered when the CesSR system itself or particular members of the CesSR regulon are knocked out, notably the genes ftsH, oxaA2, llmg_2163 and rmaB. Overexpressing cesSR reduced the growth defect, thus directly improving the production yield of BcaP. Applying this rationale to eukaryotic proteins, some of which are notoriously more difficult to produce, such as the medically-important presenilin complex, we were able to significantly diminish the growth defect seen in the wild-type strain and improve the production yield of the presenilin variant PS1Δ9-H6 more than 4-fold. Conclusions The results shed light into a key, and perhaps central, membrane protein quality control mechanism in L. lactis. Modulating the expression of CesSR benefited the production yields of membrane proteins from different origins. These findings reinforce L. lactis as a legitimate alternative host for the production of membrane proteins. PMID:21818275

  4. Validation of a Portuguese version of the Center for Epidemiologic Studies Depression Scale for Children (CES-DC

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    Camila Carvalho

    2015-09-01

    Full Text Available Aims: Depression is one of the most common mental disorders in children, and in adolescents, as in adults. Once its occurrence during childhood and adolescence leads to serious consequences in adulthood, its early detection is an important goal. Self-report instruments have a key role on accessing thoughts, feelings and behaviors in an easily, reliably and validly way. The aim of the current study is to assess psychometric properties (reliability and validity of the Portuguese translation of the Center for Epidemiological Studies-Depression Scale for Children (CES-DC. Methods: A school-based sample of 417 adolescents aged 12–18 years (M = 15,20, SD = 1,72 was involved in this study. Translation and Back Translation was made. To study convergent and divergent validity there were used the Portuguese versions of the Depression Anxiety Stress Scales (DASS 21, of the Children's Depression Inventory (CDI, and of the Students' Life Satisfaction Scale (SLSS which measure, respectively, negative emotional states (depression, anxiety and stress, depressive symptoms and global life satisfaction. Results: Factor analysis revealed three factors (mood, interpersonal relationships and happiness that explain 54% of the variance. The results show that the scale has an excellent internal consistency (α = 0,90, good temporal stability (r = 0,72 as an adequate convergent and divergent validity. Results showed that depressive symptoms varied in function of age and gender. Conclusions: The results of the present study provide initial adequate validity and reliability of the CES-DC. Nevertheless some limitations to this study, the results suggest that CES-DC can be a useful questionnaire in the assessment of depressive symptoms in Portuguese adolescents.

  5. Características sociodemográficas y reproductivas asociadas con el aumento de cesáreas en México

    OpenAIRE

    Suárez-López, Leticia; Campero, Lourdes; Vara-Salazar, Elvia De la; Rivera-Rivera, Leonor; Hernández-Serrato, María Isidra; Walker, Dilys; Lazcano-Ponce, Eduardo

    2013-01-01

    Objetivo. Describir la tendencia de la cesárea en México y su asociación con características sociodemográficas y reproductivas. Material y métodos. Con base en En-cuestas Nacionales de Salud 2000, 2006 y 2012, se analizó información de cesáreas en mujeres. Se utilizó un modelo de regresión logística multivariado en 2012. Resultados. Se identificó un incremento de 50.3% de la operación cesárea a nivel nacional en el periodo de 2000 a 2012. Las mujeres con mayor posibilidad de tener una cesárea...

  6. Efeitos do laser na cicatrização de cesárea em pacientes com diabetes gestacional

    OpenAIRE

    Santos, Hugo Campos Oliveira

    2013-01-01

    A cesárea é uma técnica cirúrgica utilizada para retirar o feto do útero, nota-se atualmente um aumento dessa cirurgia em todo o mundo. No Brasil, aproximadamente 40% do total de partos são realizados por essa via, estima-se que a cesariana corresponda a 80% dos partos na assistência privada entre 2008 a 2012 . O diabetes complica a gestação, e, a gravidez complica o diabetes, essa combinação aumenta as chances de falhas no processo de cicatrização, o que pode acarretar problemas estéticos, p...

  7. Foraminíferos epibióticos en la comunidad Sesil de las raíces de mangle

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    Losada Muñoz Diego

    1986-12-01

    Full Text Available Se presenta la composición específica de la biocenosis de foraminíferos epibióticos sobre la comunidad de las raíces de mangle rojo (Rhizophora mangle. Tal biocenosis se encuentra dominada por Planorbulina mediterranensis.  Sobre la base de las observaciones realizadas, se plantea un modelo hipotético en el cual la eficiencia de conversión de energía y superación de la competencia por espacio, por parte de los componentes de la comunidad sésil, explican su estructura.

  8. Fatores Associados à Realização de Cesárea em Primíparas com uma Cesárea Anterior Factors Associated with Cesarean Section in Primipara Women with One Previous Cesarean Section

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    José Guilherme Cecatti

    2000-04-01

    Full Text Available Objetivo: avaliar a via de parto em um grupo de gestantes primíparas de baixa renda com uma cesárea anterior e os fatores associados à repetição da cesárea no segundo parto. Pacientes e Métodos: realizou-se um estudo caso-controle com 356 gestantes atendidas de janeiro de 1993 a janeiro de 1996 na Maternidade do CAISM/UNICAMP. Constituíram os casos as 153 gestantes que tiveram o segundo parto por cesárea, e os controles, as 203 que tiveram o segundo parto vaginal. Para a análise utilizaram-se médias, desvio padrão, teste t de Student, teste de Mann-Whitney, chi² e "odds ratio" (OR e IC 95% para cada possível fator associado à realização de cesárea no segundo parto. Resultados: a via do segundo parto foi vaginal em 57% das vezes. Dentre as diversas variáveis estudadas, as que mostraram estar significativamente associadas à realização de cesárea no segundo parto foram: maior idade materna (para mulheres com 35 anos ou mais, OR = 16,4, antecedente de abortamento (OR = 2,09, indução do trabalho de parto (OR = 3,83, rotura prematura de membranas (OR = 2 ,83, a não-realização de analgesia durante o período de dilatação (OR = 5,3, o diagnóstico de algum sinal de vitalidade fetal alterada (OR = 2,7 e a ocorrência do parto à tarde (OR = 1,92. Conclusões: os resultados indicam que os fatores associados à repetição de cesárea em mulheres com uma cicatriz de cesárea nesta população são predominantemente médicos, mas há a possibilidade de se proporem intervenções dirigidas a diminuir o índice de repetição de cesáreas.Purpose: to evaluate the route of delivery in a group of low-income primipara pregnant women with a previous cesarean section, and the factors associated with the repetition of the cesarean section on the second delivery. Patients and Methods: it was a case-control study including 356 women who were assisted at the Maternity of CAISM/UNICAMP during the period between January 1993 and January

  9. Costo directo de cesáreas y reembolso del Seguro Integral de Salud: El caso del Hospital de Apoyo Pomabamba, Ancash, Perú

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    Gladys Moncada Vega

    2009-01-01

    Full Text Available Objetivo: Determinar el costo directo de la cesárea y el porcentaje de reembolso realizado por el Seguro Integral de Salud (SIS, en el Hospital de Apoyo Pomabamba (HAP, en Ancash. Material y métodos: Estudio de costos, transversal descriptivo de corte retrospectivo. Se consideraron todos los partos por cesárea en el periodo enero a diciembre 2003, 39 de ellas fueron sin complicaciones y 12 complicadas. Se revisaron las historias clínicas y los reportes operatorios de cada paciente. Se realizó análisis univariado considerando frecuencias, porcentajes y medidas de tendencia central y dispersión. Resultados: La edad media fue 25,57 años (rango: 16-43 años, el índice de cesárea en el periodo fue 5,9%. El costo directo por cesárea no complicada fue 307,64 nuevos soles y de la cesárea complicada 469,61 nuevos soles. La diferencia de 52,65% mayor a la cesárea complicada está relacionada al uso de medicamentos y mayor estancia hospitalaria. El monto por cesárea facturado al SIS en HAP fue 17 633,30 nuevos soles (media: 345,75 nuevos soles. Conclusiones: El porcentaje asumido por el HAP para las cesáreas financiadas por el SIS fue 36,5% (6 435,30 nuevos soles. Los costos directos calculados son propios del HAP y no se puede generalizar a otros hospitales, porque varían según las características y prácticas propias de cada hospital. Es necesario considerar estudios de costos que permitan observar posibles brechas en el financiamiento del SIS.(Rev Med Hered 2009;20:4-10.

  10. A longitudinal evaluation of the Center for Epidemiologic Studies-Depression scale (CES-D) in a Rheumatoid Arthritis Population using Rasch Analysis

    Science.gov (United States)

    Covic, Tanya; Pallant, Julie F; Conaghan, Philip G; Tennant, Alan

    2007-01-01

    Background The aim of this study was to test the internal validity of the total Center for Epidemiologic Studies-Depression (CES-D) scale using Rasch analysis in a rheumatoid arthritis (RA) population. Methods CES-D was administered to 157 patients with RA over three time points within a 12 month period. Rasch analysis was applied using RUMM2020 software to assess the overall fit of the model, the response scale used, individual item fit, differential item functioning (DIF) and person separation. Results Pooled data across three time points was shown to fit the Rasch model with removal of seven items from the original 20-item CES-D scale. It was necessary to rescore the response format from four to three categories in order to improve the scale's fit. Two items demonstrated some DIF for age and gender but were retained within the 13-item CES-D scale. A new cut point for depression score of 9 was found to correspond to the original cut point score of 16 in the full CES-D scale. Conclusion This Rasch analysis of the CES-D in a longstanding RA cohort resulted in the construction of a modified 13-item scale with good internal validity. Further validation of the modified scale is recommended particularly in relation to the new cut point for depression. PMID:17629902

  11. A longitudinal evaluation of the Center for Epidemiologic Studies-Depression scale (CES-D in a Rheumatoid Arthritis Population using Rasch Analysis

    Directory of Open Access Journals (Sweden)

    Tennant Alan

    2007-07-01

    Full Text Available Abstract Background The aim of this study was to test the internal validity of the total Center for Epidemiologic Studies-Depression (CES-D scale using Rasch analysis in a rheumatoid arthritis (RA population. Methods CES-D was administered to 157 patients with RA over three time points within a 12 month period. Rasch analysis was applied using RUMM2020 software to assess the overall fit of the model, the response scale used, individual item fit, differential item functioning (DIF and person separation. Results Pooled data across three time points was shown to fit the Rasch model with removal of seven items from the original 20-item CES-D scale. It was necessary to rescore the response format from four to three categories in order to improve the scale's fit. Two items demonstrated some DIF for age and gender but were retained within the 13-item CES-D scale. A new cut point for depression score of 9 was found to correspond to the original cut point score of 16 in the full CES-D scale. Conclusion This Rasch analysis of the CES-D in a longstanding RA cohort resulted in the construction of a modified 13-item scale with good internal validity. Further validation of the modified scale is recommended particularly in relation to the new cut point for depression.

  12. La «loi pêche» (Code rural et l'introduction des espèces piscicoles

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    GUEVEL B.

    1997-01-01

    Full Text Available Les introductions d'espèces piscicoles non représentées et/ou susceptibles de créer des déséquilibres biologiques se développent, ici ou là, pour des considérations halieutiques ou accessoirement scientifiques, ou tout simplement pour se débarrasser de spécimens devenus encombrants. Face à ce phénomène, le droit de la pêche continentale n'offre qu'une réponse partielle qui n'est pas suffisante, à ce jour, pour assurer son contrôle. Ainsi, le chapitre II du titre troisième (pêche en eau douce et gestion des ressources piscicoles du livre II (nouveau du Code rural organise le contrôle des peuplements (section IV : articles L.232-10 à L.232-12, R.*232-3 à R.*232-25 du Code rural. Ce dispositif comporte un ensemble d'interdictions assorties, le cas échéant, d'autorisations : - interdiction d'introduire dans les eaux libres et les piscicultures, et de transporter sans autorisation, des poissons susceptibles de provoquer des déséquilibres biologiques ; - interdiction d'introduire sans autorisation des espèces de poissons qui ne sont pas officiellement représentées dans les eaux douces nationales ; - interdiction d'introduire, dans les eaux classées en 1ère catégorie piscicole, des poissons des espèces carnassières (brochet, perche, sandre et black-bass ; - interdiction d'introduire dans les eaux libres, pour rempoissonner ou aleviner, des poissons qui ne proviennent pas d'établissements agréés. Cette législation est perfectible en tant qu'elle suscite des difficultés d'application : la notion d'introduction n'est pas explicitée par les textes et doit être distinguée de l'emploi d'appâts vifs ou de la remise à l'eau ; le transport des espèces non représentées - autres que celles qui sont de nature à créer des déséquilibres biologiques - n'est pas soumis à autorisation et s'effectue donc librement ; le système de listes d'espèces présente une certaine rigidité et ne permet pas de pr

  13. The Natural History of Kidney Graft Cortical Microcirculation Determined by Real-Time Contrast-Enhanced Sonography (RT-CES).

    Science.gov (United States)

    Jiménez, Carlos; López, María Ovidia; Ros, Amaia; Aguilar, Ana; Menendez, David; Rivas, Begoña; Santana, María José; Vaca, Marco Antonio; Escuin, Fernando; Madero, Rosario; Selgas, Rafael

    2016-01-01

    Kidney transplantation is the therapy of choice for end-stage kidney disease. Graft's life span is shorter than expected due in part to the delayed diagnosis of various complications, specifically those related to silent progression. It is recognized that serum creatinine levels and proteinuria are poor markers of mild kidney lesions, which results in delayed clinical information. There are many investigation looking for early markers of graft damage. Decreasing kidney graft cortical microcirculation has been related to poor prognosis in kidney transplantation. Cortical capillary blood flow (CCBF) can be measured by real-time contrast-enhanced sonography (RT-CES). Our aim was to describe the natural history of CCBF over time under diverse conditions of kidney transplantation, to explore the influence of donor conditions and recipient events, and to determine the capacity of CCBF for predicting renal function in medium term. RT-CES was performed in 79 consecutive kidney transplant recipients during the first year under regular clinical practice. Cortical capillary blood flow was measured. Clinical variables were analyzed. The influence of CCBF has been determined by univariate and multivariate analysis using mixed regression models based on sequential measurements for each patient over time. We used a first-order autoregression model as the structure of the covariation between measures. The post-hoc comparisons were considered using the Bonferroni correction. The CCBF values varied significantly over the study periods and were significantly lower at 48 h and day 7. Brain-death donor age and CCBF levels showed an inverse relationship (r: -0.62, p<0.001). Living donors showed higher mean CCBF levels than brain-death donors at each point in the study. These significant differences persisted at month 12 (54.5 ± 28.2 vs 33.7 ± 30 dB/sec, living vs brain-death donor, respectively, p = 0.004) despite similar serum creatinine levels (1.5 ± 0.3 and 1.5 ± 0.5 mg/dL). A

  14. Validation of the 10-item Centre for Epidemiological Studies Depression Scale (CES-D-10) in Zulu, Xhosa and Afrikaans populations in South Africa.

    Science.gov (United States)

    Baron, Emily Claire; Davies, Thandi; Lund, Crick

    2017-01-09

    The 10-item Centre for Epidemiological Studies Depression Scale (CES-D-10) is a depression screening tool that has been used in the South African National Income Dynamics Study (NIDS), a national household panel study. This screening tool has not yet been validated in South Africa. This study aimed to establish the reliability and validity of the CES-D-10 in Zulu, Xhosa and Afrikaans. The CES-D-10's psychometric properties were also compared to the Patient Health Questionnaire (PHQ-9), a depression screening tool already validated in South Africa. Stratified random samples of Xhosa, Afrikaans and Zulu-speaking participants aged 15 years or older (N = 944) were recruited from Cape Town Metro and Ethekwini districts. Face-to-face interviews included socio-demographic questions, the CES-D-10, Patient Health Questionnaire (PHQ-9), and WHO Disability Assessment Schedule 2.0 (WHODAS). Major depression was determined using the Mini International Neuropsychiatric Interview. All instruments were translated and back-translated to English. Construct validity was examined using exploratory factor analysis with varimax rotation. Receiver Operating Characteristics (ROC) curves were used to investigate the CES-D-10 and PHQ-9's criterion validity, and compared using the DeLong method. Overall, 6.6, 18.0 and 6.9% of the Zulu, Afrikaans and Xhosa samples were diagnosed with depression, respectively. The CES-D-10 had acceptable internal consistency across samples (α = 0.69-0.89), and adequate concurrent validity, when compared to the PHQ-9 and WHODAS. The CES-D-10 area under the Receiver Operator Characteristic curve was good to excellent: 0.81 (95% CI 0.71-0.90) for Zulu, 0.93 (95% CI 0.90-0.96) for Afrikaans, and 0.94 (95% CI 0.89-0.99) for Xhosa. A cut-off of 12, 11 and 13 for Zulu, Afrikaans and Xhosa, respectively, generated the most balanced sensitivity, specificity and positive predictive value (Zulu: 71.4, 72.6% and 16.1%; Afrikaans: 84.6%, 84.0%, 53.7%; Xhosa: 81

  15. Embarazo ectópico en cicatriz de cesárea. Presentación de un caso

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    Martha Lucía Marrugo-Flórez

    2013-01-01

    Full Text Available El embarazo ectópico en cicatriz de cesárea anterior corresponde aproximadamente al 6,1 % de todos los embarazos ectópicos y tiene una incidencia mayor que el embarazo cervical dentro del grupo mencionado. Consiste en la implantación del blastocito en la cicatriz uterina, rodeado de miometrio y tejido conectivo. El manejo de esta patología ha sido controversial a lo largo de los años, debido a que ocurre en muchas mujeres que desean conservar su paridad. Presentamos un caso atendido en marzo en nuestra institución, en el que se realizó manejo médico con metrotexate sistémico e intraamniótico y presentó una evolución satisfactoria. Se realiza una revisión del tema y se explican los diferentes manejos propuestos para esta patología.

  16. La sexualité des adolescents: quelle évolution ces 40 dernières années?

    OpenAIRE

    Michaud, P.A.; Akre, C.

    2009-01-01

    Le contexte : Pour comprendre la manière dont a évolué la sexualité des adolescents ces dernières décennies, il importe de tenir compte de plusieurs changements sociaux qui ont considérablement modifié le contexte dans lequel les jeunes se développent du point de vue affectif et sexuel. La famille telle qu’Ariès en a décrit l’avènement au cours du XVIIIème et XIXème siècle cède de plus en plus le pas à une famille nucléarisée voire recomposée(1). Le cadre relativement strict qui prévalait ...

  17. Measurement equivalence of the CES-D 8 depression-scale among the ageing population in eleven European countries.

    Science.gov (United States)

    Missinne, Sarah; Vandeviver, Christophe; Van de Velde, Sarah; Bracke, Piet

    2014-07-01

    Depression is one of the most prevalent mental disorders in later life. However, despite considerable research attention, great confusion remains regarding the association between ageing and depression. There is doubt as to whether a depression scale performs identically for different age groups and countries. Although measurement equivalence is a crucial prerequisite for valid comparisons across age groups and countries, it has not been established for the eight-item version of the Centre for Epidemiological Studies Depression Scale (CES-D8). Using multi-group confirmatory factor analysis, we assess configural, metric, and scalar measurement equivalence across two age groups (50-64 years of age and 65 or older) in eleven European countries, employing data from the Survey of Health, Ageing, and Retirement (SHARE). Results indicate that the construct of depression is comparable across age and country groups, allowing the substantive interpretation of correlates and mean levels of depressive symptoms. Copyright © 2014 Elsevier Inc. All rights reserved.

  18. Morningness-eveningness and depressive symptoms: Test on the components level with CES-D in Polish students.

    Science.gov (United States)

    Jankowski, Konrad S

    2016-05-15

    The study aimed to elucidate previously observed associations between morningness-eveningness and depressive symptomatology in university students. Relations between components of depressive symptomatology and morningness-eveningness were analysed. Nine hundred and seventy-four university students completed Polish versions of the Centre for Epidemiological Studies - Depression scale (CES-D; Polish translation appended to this paper) and the Composite Scale of Morningness. Principal component analysis (PCA) was used to test the structure of depressive symptoms. Pearson and partial correlations (with age and sex controlled), along with regression analyses with morning affect (MA) and circadian preference as predictors, were used. PCA revealed three components of depressive symptoms: depressed/somatic affect, positive affect, interpersonal relations. Greater MA was related to less depressive symptoms in three components. Morning circadian preference was related to less depressive symptoms in depressed/somatic and positive affects and unrelated to interpersonal relations. Both morningness-eveningness components exhibited stronger links with depressed/somatic and positive affects than with interpersonal relations. Three CES-D components exhibited stronger links with MA than with circadian preference. In regression analyses only MA was statistically significant for positive affect and better interpersonal relations, whereas more depressed/somatic affect was predicted by lower MA and morning circadian preference (relationship reversed compared to correlations). Self-report assessment. There are three groups of depressive symptoms in Polish university students. Associations of MA with depressed/somatic and positive affects are primarily responsible for the observed links between morningness-eveningness and depressive symptoms in university students. People with evening circadian preference whose MA is not lowered have less depressed/somatic affect. Copyright © 2016

  19. Integration of Physical, Genetic, and Cytogenetic Mapping Data for Cellulose Synthase (CesA Genes in Flax (Linum usitatissimum L.

    Directory of Open Access Journals (Sweden)

    Olga Y. Yurkevich

    2017-08-01

    Full Text Available Flax, Linum usitatissimum L., is a valuable multi-purpose plant, and currently, its genome is being extensively investigated. Nevertheless, mapping of genes in flax genome is still remaining a challenging task. The cellulose synthase (CesA multigene family involving in the process of cellulose synthesis is especially important for metabolism of this fiber crop. For the first time, fluorescent in situ hybridization (FISH-based chromosomal localization of the CesA conserved fragment (KF011584.1, 5S, and 26S rRNA genes was performed in landrace, oilseed, and fiber varieties of L. usitatissimum. Intraspecific polymorphism in chromosomal distribution of KF011584.1 and 5S DNA loci was revealed, and the generalized chromosome ideogram was constructed. Using BLAST analysis, available data on physical/genetic mapping and also whole-genome sequencing of flax, localization of KF011584.1, 45S, and 5S rRNA sequences on genomic scaffolds, and their anchoring to the genetic map were conducted. The alignment of the results of FISH and BLAST analyses indicated that KF011584.1 fragment revealed on chromosome 3 could be anchored to linkage group (LG 11. The common LG for 45S and 5S rDNA was not found probably due to the polymorphic localization of 5S rDNA on chromosome 1. Our findings indicate the complexity of integration of physical, genetic, and cytogenetic mapping data for multicopy gene families in plants. Nevertheless, the obtained results can be useful for future progress in constructing of integrated physical/genetic/cytological maps in L. usitatissimum which are essential for flax breeding.

  20. Integration of Physical, Genetic, and Cytogenetic Mapping Data for Cellulose Synthase (CesA) Genes in Flax (Linum usitatissimum L.).

    Science.gov (United States)

    Yurkevich, Olga Y; Kirov, Ilya V; Bolsheva, Nadezhda L; Rachinskaya, Olga A; Grushetskaya, Zoya E; Zoschuk, Svyatoslav A; Samatadze, Tatiana E; Bogdanova, Marina V; Lemesh, Valentina A; Amosova, Alexandra V; Muravenko, Olga V

    2017-01-01

    Flax, Linum usitatissimum L., is a valuable multi-purpose plant, and currently, its genome is being extensively investigated. Nevertheless, mapping of genes in flax genome is still remaining a challenging task. The cellulose synthase ( CesA ) multigene family involving in the process of cellulose synthesis is especially important for metabolism of this fiber crop. For the first time, fluorescent in situ hybridization (FISH)-based chromosomal localization of the CesA conserved fragment (KF011584.1), 5S, and 26S rRNA genes was performed in landrace, oilseed, and fiber varieties of L. usitatissimum . Intraspecific polymorphism in chromosomal distribution of KF011584.1 and 5S DNA loci was revealed, and the generalized chromosome ideogram was constructed. Using BLAST analysis, available data on physical/genetic mapping and also whole-genome sequencing of flax, localization of KF011584.1, 45S, and 5S rRNA sequences on genomic scaffolds, and their anchoring to the genetic map were conducted. The alignment of the results of FISH and BLAST analyses indicated that KF011584.1 fragment revealed on chromosome 3 could be anchored to linkage group (LG) 11. The common LG for 45S and 5S rDNA was not found probably due to the polymorphic localization of 5S rDNA on chromosome 1. Our findings indicate the complexity of integration of physical, genetic, and cytogenetic mapping data for multicopy gene families in plants. Nevertheless, the obtained results can be useful for future progress in constructing of integrated physical/genetic/cytological maps in L. usitatissimum which are essential for flax breeding.

  1. Validation of the Turkish version of the Centre for Epidemiologic Studies Depression Scale (CES-D) in patients with type 2 diabetes mellitus

    DEFF Research Database (Denmark)

    Lehmann, Vicky; Makine, Ceylan; Karşıdağ, Cagatay

    2011-01-01

    BACKGROUND: Depression is a common co-morbid health problem in patients with diabetes that is underrecognised. Current international guidelines recommend screening for depression in patients with diabetes. Yet, few depression screening instruments have been validated for use in this particular......-D, the World Health Organization-Five Well-Being Index (WHO-5), and the Problem Areas in Diabetes scale (PAID). Explanatory factor analyses, various correlations and Cronbach's alpha were investigated to test the validity and reliability of the CES-D in Turkish diabetes outpatients. RESULTS: The original four...... of the total score was high (0.88), as were split-half coefficients (0.77-0.90). The correlation of the CES-D with the WHO-5 was the strongest (r = -0.70), and supported concurrent validity. CONCLUSION: The CES-D appears to be a valid measure for the assessment of depression in Turkish diabetes patients...

  2. An assessment of the measurement equivalence of English and French versions of the Center for Epidemiologic Studies Depression (CES-D Scale in systemic sclerosis.

    Directory of Open Access Journals (Sweden)

    Vanessa C Delisle

    Full Text Available Center for Epidemiologic Studies Depression (CES-D Scale scores in English- and French-speaking Canadian systemic sclerosis (SSc patients are commonly pooled in analyses, but no studies have evaluated the metric equivalence of the English and French CES-D. The study objective was to examine the metric equivalence of the CES-D in English- and French-speaking SSc patients.The CES-D was completed by 1007 English-speaking and 248 French-speaking patients from the Canadian Scleroderma Research Group Registry. Confirmatory factor analysis (CFA was used to assess the factor structure in both samples. The Multiple-Indicator Multiple-Cause (MIMIC model was utilized to assess differential item functioning (DIF.A two-factor model (Positive and Negative affect showed excellent fit in both samples. Statistically significant, but small-magnitude, DIF was found for 3 of 20 CES-D items, including items 3 (Blues, 10 (Fearful, and 11 (Sleep. Prior to accounting for DIF, French-speaking patients had 0.08 of a standard deviation (SD lower latent scores for the Positive factor (95% confidence interval [CI]-0.25 to 0.08 and 0.09 SD higher scores (95% CI-0.07 to 0.24 for the Negative factor than English-speaking patients. After DIF correction, there was no change on the Positive factor and a non-significant increase of 0.04 SD on the Negative factor for French-speaking patients (difference = 0.13 SD, 95% CI-0.03 to 0.28.The English and French versions of the CES-D, despite minor DIF on several items, are substantively equivalent and can be used in studies that combine data from English- and French-speaking Canadian SSc patients.

  3. An assessment of the measurement equivalence of English and French versions of the Center for Epidemiologic Studies Depression (CES-D) Scale in systemic sclerosis.

    Science.gov (United States)

    Delisle, Vanessa C; Kwakkenbos, Linda; Hudson, Marie; Baron, Murray; Thombs, Brett D

    2014-01-01

    Center for Epidemiologic Studies Depression (CES-D) Scale scores in English- and French-speaking Canadian systemic sclerosis (SSc) patients are commonly pooled in analyses, but no studies have evaluated the metric equivalence of the English and French CES-D. The study objective was to examine the metric equivalence of the CES-D in English- and French-speaking SSc patients. The CES-D was completed by 1007 English-speaking and 248 French-speaking patients from the Canadian Scleroderma Research Group Registry. Confirmatory factor analysis (CFA) was used to assess the factor structure in both samples. The Multiple-Indicator Multiple-Cause (MIMIC) model was utilized to assess differential item functioning (DIF). A two-factor model (Positive and Negative affect) showed excellent fit in both samples. Statistically significant, but small-magnitude, DIF was found for 3 of 20 CES-D items, including items 3 (Blues), 10 (Fearful), and 11 (Sleep). Prior to accounting for DIF, French-speaking patients had 0.08 of a standard deviation (SD) lower latent scores for the Positive factor (95% confidence interval [CI]-0.25 to 0.08) and 0.09 SD higher scores (95% CI-0.07 to 0.24) for the Negative factor than English-speaking patients. After DIF correction, there was no change on the Positive factor and a non-significant increase of 0.04 SD on the Negative factor for French-speaking patients (difference = 0.13 SD, 95% CI-0.03 to 0.28). The English and French versions of the CES-D, despite minor DIF on several items, are substantively equivalent and can be used in studies that combine data from English- and French-speaking Canadian SSc patients.

  4. DISPONIBILIDAD DE RAÍCES ADVENTICIAS DE TRES ESPECIES SILVESTRES COSECHADAS PARA LA ELABORACIÓN DE ARTESANÍAS EN SANTA ELENA, ANTIOQUIA (COLOMBIA

    Directory of Open Access Journals (Sweden)

    ANA MARÍA BENAVIDES

    2015-01-01

    Full Text Available En los Andes colombianos, un gran número de artesanías se fabrican a partir de raíces adventicias de plantas nativas que crecen de forma silvestre. Sin embargo, la deforestación y las prácticas no sustentables han diezmado la disponibilidad de plantas silvestres productoras de fibra. En este estudio evaluamos la disponibilidad de fibras de tres especies en Santa Elena (Antioquia, Colombia: Asplundia sarmentosa, Philodendron aff. sagittifolium y Clusia multiflora. Después de una búsqueda exhaustiva en la zona de estudio ubicamos menos de 30 individuos adultos de cada especie. Para cada planta se midieron las variables asociadas al tamaño de la planta y se registró el número y la longitud de raíces maduras e inmaduras. Se pesaron fragmentos de raíces para estimar la biomasa. El crecimiento de raíces de cada planta fue monitoreado mensualmente durante siete meses. La disponibilidad actual de fibra (raíces maduras es de ca. 3 352 m (Asplundia 1 481 m, Clusia de 952 m, Philodendron 918 m, con esta cantidad de material se pueden elaborar entre 419 a 838 canastos. De acuerdo a la tasa de crecimiento mensual, una nueva raíz podría alcanzar un tamaño para ser cosechado entre el mes 38 y 71. Plantas más grandes tienen mayor cantidad de raíces maduras, sin embargo, la tasa de crecimiento no está asociada al tamaño de la planta. Nuestros resultados proveen evidencia de que las plantas en Santa Elena presentan una relación (tamaño de la planta, número de raíces maduras que es similar a plantas que se encuentran en zonas no intervenidas, no obstante, la cosecha de fibras en Santa Elena no es una actividad sostenible debido al bajo número de individuos susceptibles de ser cosechados, la lenta tasa de crecimiento de raíces y la alta demanda de fibras. Es necesario implementar estrategias como el enriquecimiento del bosque con estas tres especies para garantizar una actividad sustentable para recolectores y artesanos en Santa Elena y

  5. Anestesia general para cesárea. Papel del sugammadex en la calidad y la seguridad del acto anestésico. Reporte de caso

    OpenAIRE

    Tafur B, Luis Alberto; Lema Flórez, Eduardo

    2012-01-01

    La cesárea es una de las intervenciones quirúrgicas más realizadas en el planeta. En el 5% de los casos se practica bajo anestesia general (7,5 millones de anestesias generales para cesárea cada año). Debido a sus requerimientos particulares (paciente con estómago lleno, necesidad de relajación neuromuscular, bienestar del binomio madre-hijo, expectativas de pronta atención del recién nacido por parte de la madre y relativa corta duración del procedimiento) la anestesia general representa un ...

  6. Reliability and Validity of the Persian Version of Compulsive Eating Scale (CES in Overweight or Obese Women and its Relationship with Some Body Composition and Dietary Intake Variables

    Directory of Open Access Journals (Sweden)

    Seyed-Ali Mostafavi

    2016-12-01

    Full Text Available Objective: Compulsive or binge eating is a kind of disturbed eating behavior, which is mostly observed among dieting women, and is integrated with appetite disorder, and uncontrolled eating of plenty of junk food. The Compulsive Eating Scale (CES created first by Kagan & Squires in 1984, is an eight-item self-reporting instrument that is made to measure the severity of binge eating disorder. The aim of this study was to provide the reliability and validity of the Persian version of Compulsive Eating Scale (CES among overweight and obese women in Iran. Method: One hundred and twenty six (N = 126 overweight and obese women consented to participate in this study. We estimated the anthropometric indices, including body weight, height, waist and hip circumferences, a total body fat percentage, and visceral fat level with body analyzer all in standard situations. Then, the participants completed the CES. Next, to assess concurrent validity, Beck Depression Inventory, Spielberger anxiety scale, appetite visual analogue rating scale, Food Craving questionnaire, Three-Factor Eating Questionnaire-R18, and Restraint eating visual analogue rating scale were performed simultaneously. To assess test-retest reliability, CES was repeated for all the participants two weeks later. Moreover, we reported the internal consistency and factor analysis of this questionnaire. Furthermore, we estimated the concurrent correlation of CES with logically relevant questionnaires and body composition and anthropometric indices.Results: Based on the reliability analysis and factor analysis of the principal component by Varimax rotation, we extracted two factors: eating because of negative feelings, and overeating. Internal consistency (Cronbach's alpha of the CES was 0.85 (Cronbach alpha of the factors was 0.85, and 0.74, respectively. The test-retest correlation of the CES was 0.89. Also, the split-half reliability of the questionnaire was established with the correlation

  7. Posfolklore: Raíces y globalización en la música popular chilena

    Directory of Open Access Journals (Sweden)

    González, Juan Pablo

    2011-10-01

    Full Text Available This article discusses the development of the concept of folk roots, introduced by Chilean singer-songwriters in the mid-seventies, as a strategy to legitimize their divergent practice from the norm of folklore in times of military rule. The institutionalization of this concept with the return of democracy in the early nineties and its continued tightening from a third generation of Chilean singersongwriters and bands derivatives from theater companies, allow us to discuss the problem of folk roots in times of globalization. We propose the concepts of posfolklore and hydroponic roots, attached to the trend of Chilean listeners and musicians to incorporate world music to their artistic practices and consumption. These concepts would facilitate the discussion of the mixing of influences in Chilean music and the consequent proliferation of intermediate rather than hegemonic identities in contemporary Chilean culture.

    Este artículo aborda el desarrollo del concepto de raíz folklórica, introducido por cantautores chilenos a mediados de los años setenta, como estrategia para legitimar corrientes divergentes del folklore de la norma imperante en tiempos del régimen militar. La institucionalización de este concepto con el retorno a la democracia y su continuo tensionamiento desde una tercera generación de cantautores nacionales y desde los nuevos grupos musicales derivados de compañías teatrales, permite reflexionar sobre el problema de las raíces en tiempos de globalización. Se proponen los conceptos de posfolklore y de raíces hidropónicas, adscritos a la permanente tendencia del músico y del auditor chileno a incorporar músicas del mundo a su práctica y consumo musical. Estos conceptos permiten discutir las mezclas en la música chilena y la consiguiente multiplicación de identidades intermedias más que hegemónicas en la cultura chilena contemporánea.

  8. The evaluation of the Center for Epidemiologic Studies Depression (CES-D) scale : Depressed and Positive Affect in cancer patients and healthy reference subjects

    NARCIS (Netherlands)

    Schroevers, MJ; Sanderman, R; van Sonderen, E; Ranchor, AV

    2000-01-01

    This study examined the reliability and validity of a two-factor structure of the Center for Epidemiologic Studies Depression (CES-D) scale. The study was conducted in a large group of cancer patients (n = 475) and a matched reference group (n = 255). Both groups filled in a questionnaire at two

  9. COLONIZACIÓN DE MOLUSCOS Y CRUSTÁCEOS EN RAÍCES DE MANGLE ROJO EN UNA LAGUNA COSTERA DE LA PUNTA NORTE DEL GOLFO DE MORROSQUILLO

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    PRÜSMANN JOHANNA

    2010-05-01

    Full Text Available Se evaluaron la colonización y sucesión de moluscos y crustáceos en un sustrato de raíces de mangle en tres estaciones en la ciénaga La Boquilla, Punta San Bernardo en la parte norte del Golfo de Morrosquillo. Para el seguimiento del proceso de colonización se ubicaron tres sitios en las márgenes occidental, norte y oriental, y se fijaron en cada estación seis raíces aéreas deshojadas de Rhizophora mangle. Luego de 76 y 200 días de exposición, se retiraron tres raíces de cada sitio y se identificaron los organismos por morfoespecie. Después de 200 días de exposición, se determinaron 19 especies de moluscos y cinco de crustáceos. El anfípodo Corophium sp. y el bivalvo Brachidontes exustus fueron las especies mas numerosas y agruparon una fracción muy importante de la totalidad de los individuos recolectados. La mayoría de las especies encontradas son típicas de la fauna acompañante de las raíces de mangle en el Caribe colombiano.

  10. Research Note: Equivalence of French and English Language Versions of the Center for Epidemiologic Studies-Depression Scale (CES-D) among Caregivers of Persons with Dementia

    Science.gov (United States)

    O'Rourke, Norm

    2003-01-01

    The Center for Epidemiologic Studies-Depression Scale (CES-D) is among the most widely used depression screening measures. Existing research suggests a higher-order factor structure of responses among older adults (factors labelled "depressive affect," "absence of well-being," "somatic symptoms," and "interpersonal affect," each loading upon a…

  11. Factor Structure of the Center for Epidemiologic Studies-Depression Scale (CES-D) Among Older Men and Women Who Provide Care to Persons with Dementia

    Science.gov (United States)

    O'Rourke, Norm

    2005-01-01

    The Center for Epidemiologic Studies?Depression Scale (CES-D) is among the most widely used depression screening measures. Existing research suggests a higher order factor structure of responses among older adults (factors labeled as Depressive Affect, Absence of Well-being, Somatic Symptoms, and Interpersonal Affect each loading on a 2nd-order…

  12. IDEAS Pamphlet for CES

    Science.gov (United States)

    Miranda, David J.; Santora, Joshua D.; Hochstadt, Jake

    2017-01-01

    Pamphlet on the IDEAS project for the Game Changing Development programs NASA booth at the Consumer Electronics Show. Pamphlet covers a high level overview of the technology developed and its capabilities. The technology being developed for the Integrated Display and Environmental Awareness System (IDEAS) project is a wearable computer system with an optical heads-up display (HUD) providing various means of communication and data manipulation to the user. The wearable computer, in the form of smart glasses, would allow personnel to view and modify critical information on a transparent, interactive display. This is presented in their unobstructed field of view, without taking their eyes or hands away from their critical work. The product is being designed in a modular manner so that the user can adjust the capabilities of the device depending on need. IDEAS is a full featured hardware and softwaresystem built to enhance the capabilities of theNASA work force on the ground and in space.

  13. Exotic helium molecules; Molecules exotiques d'helium

    Energy Technology Data Exchange (ETDEWEB)

    Portier, M

    2007-12-15

    We study the photo-association of an ultracold cloud of magnetically trapped helium atoms: pairs of colliding atoms interact with one or two laser fields to produce a purely long range {sup 4}He{sub 2}(2{sup 3}S{sub 1}-2{sup 3}P{sub 0}) molecule, or a {sup 4}He{sub 2}(2{sup 3}S{sub 1}-2{sup 3}S{sub 1}) long range molecule. Light shifts in one photon photo-association spectra are measured and studied as a function of the laser polarization and intensity, and the vibrational state of the excited molecule. They result from the light-induced coupling between the excited molecule, and bound and scattering states of the interaction between two metastable atoms. Their analysis leads to the determination of the scattering length a = (7.2 {+-} 0.6) ruling collisions between spin polarized atoms. The two photon photo-association spectra show evidence of the production of polarized, long-range {sup 4}He{sub 2}(2{sup 3}S{sub 1}-2{sup 3}S{sub 1}) molecules. They are said to be exotic as they are made of two metastable atoms, each one carrying a enough energy to ionize the other. The corresponding lineshapes are calculated and decomposed in sums and products of Breit-Wigner and Fano profiles associated to one and two photon processes. The experimental spectra are fit, and an intrinsic lifetime {tau} = (1.4 {+-} 0.3) {mu}s is deduced. It is checked whether this lifetime could be limited by spin-dipole induced Penning autoionization. This interpretation requires that there is a quasi-bound state close to the dissociation threshold in the singlet interaction potential between metastable helium atoms for the theory to match the experiment. (author)

  14. Exotic helium molecules; Molecules exotiques d'helium

    Energy Technology Data Exchange (ETDEWEB)

    Portier, M

    2007-12-15

    We study the photo-association of an ultracold cloud of magnetically trapped helium atoms: pairs of colliding atoms interact with one or two laser fields to produce a purely long range {sup 4}He{sub 2}(2{sup 3}S{sub 1}-2{sup 3}P{sub 0}) molecule, or a {sup 4}He{sub 2}(2{sup 3}S{sub 1}-2{sup 3}S{sub 1}) long range molecule. Light shifts in one photon photo-association spectra are measured and studied as a function of the laser polarization and intensity, and the vibrational state of the excited molecule. They result from the light-induced coupling between the excited molecule, and bound and scattering states of the interaction between two metastable atoms. Their analysis leads to the determination of the scattering length a = (7.2 {+-} 0.6) ruling collisions between spin polarized atoms. The two photon photo-association spectra show evidence of the production of polarized, long-range {sup 4}He{sub 2}(2{sup 3}S{sub 1}-2{sup 3}S{sub 1}) molecules. They are said to be exotic as they are made of two metastable atoms, each one carrying a enough energy to ionize the other. The corresponding lineshapes are calculated and decomposed in sums and products of Breit-Wigner and Fano profiles associated to one and two photon processes. The experimental spectra are fit, and an intrinsic lifetime {tau} = (1.4 {+-} 0.3) {mu}s is deduced. It is checked whether this lifetime could be limited by spin-dipole induced Penning autoionization. This interpretation requires that there is a quasi-bound state close to the dissociation threshold in the singlet interaction potential between metastable helium atoms for the theory to match the experiment. (author)

  15. Mieux comprendre les especes exotiques envahissantes a la ...

    African Journals Online (AJOL)

    De façon générale, les causes de leur prolifération sont attribuées aux ... affect biodiversity is the second cause of species extinction throughout the world. ... it is to admit that besides animal and plant species, human species is also to be ...

  16. Análise dos fatores de risco anteparto para ocorrência de cesárea Analysis of the risk factors for cesarean section

    Directory of Open Access Journals (Sweden)

    Simone Angélica Leite de Carvalho Silva

    2005-04-01

    Full Text Available OBJETIVOS: criar um modelo preditivo para ocorrência de cesárea na Maternidade Professor Monteiro de Morais após avaliação dos fatores de risco anteparto das gestantes que pariram no período de 1 de setembro de 1999 a 31 de agosto de 2000, e posteriormente verificar a eficiência do serviço na indicação de cesárea. MÉTODOS: foi realizado estudo longitudinal, do tipo caso-controle com 3626 gestantes, no qual se verificou quais os fatores anteparto foram considerados de risco para cesárea, no período de 1 de setembro de 1999 a 31 de agosto de 2000. Posteriormente, criou-se modelo preditivo ideal, o qual permitiu quantificar o risco de cesárea para cada paciente na presença de um ou mais fatores de risco. A seguir, aplicou-se o modelo à amostra do estudo a fim de verificar o grau de concordância entre o risco previsto de cesárea e a realização do ato cirúrgico, ou seja, a eficácia na indicação de cesariana. RESULTADOS: aplicando-se o modelo preditivo na amostra, verificou-se que na ausência dos fatores de riscos anteparto, o risco basal de cesárea foi de 15,2%. O grau de concordância entre o previsto pelo modelo logístico e a ocorrência de cesárea foi de 86,6%. CONCLUSÕES: o modelo logístico permitiu identificar o risco basal de cesárea e quantificar a probabilidade de cesárea a partir da introdução do fator de risco. O modelo pode ser considerado útil e eficaz, uma vez que houve concordância entre o acerto e o previsto em 86,6% para cesariana, e 53,6% das pacientes submetidas ao parto normal, de fato, não tinham fator de risco para cesárea.PURPOSE: to create a predictive model for cesarean section at the "Professor Monteiro de Morais Maternity" after evaluation of antepartum risk factors of the pregnant women who delivered from September 1, 1999 to August 31, 2000, and then, to verify the efficacy of indication for cesarean section. METHODS: a longitudinal, case control study with 3.626 pregnant women was

  17. Validation of the turkish version of the centre for epidemiologic studies depression scale (ces-d in patients with type 2 diabetes mellitus

    Directory of Open Access Journals (Sweden)

    Karşıdağ Kubilay

    2011-07-01

    Full Text Available Abstract Background Depression is a common co-morbid health problem in patients with diabetes that is underrecognised. Current international guidelines recommend screening for depression in patients with diabetes. Yet, few depression screening instruments have been validated for use in this particular group of patients. Aim of the present study was to investigate the psychometric properties of the Turkish version of the Centre for Epidemiologic Studies Depression Scale (CES-D in patients with type 2 diabetes. Methods A sample of 151 Turkish outpatients with type 2 diabetes completed the CES-D, the World Health Organization-Five Well-Being Index (WHO-5, and the Problem Areas in Diabetes scale (PAID. Explanatory factor analyses, various correlations and Cronbach's alpha were investigated to test the validity and reliability of the CES-D in Turkish diabetes outpatients. Results The original four-factor structure proposed by Radloff was not confirmed. Explanatory factor analyses revealed a two-factor structure representing two subscales: (1 depressed mood combined with somatic symptoms of depression and (2 positive affect. However, one item showed insufficient factor loadings. Cronbach's alpha of the total score was high (0.88, as were split-half coefficients (0.77-0.90. The correlation of the CES-D with the WHO-5 was the strongest (r = -0.70, and supported concurrent validity. Conclusion The CES-D appears to be a valid measure for the assessment of depression in Turkish diabetes patients. Future studies should investigate its sensitivity and specificity as well as test-retest reliability.

  18. Association between the Center for Epidemiologic Studies Depression Scale (CES-D and mortality in a community sample: An artifact of the somatic complaints factor?

    Directory of Open Access Journals (Sweden)

    Jeremy W. Pettit

    2008-01-01

    Full Text Available La mayoría de las investigaciones sobre la asociación entre la depresión y la mortalidad no han examinado distintos grupos de síntomas depresivos. Este estudio ex post facto examinó que aspectos de la depresión explican su asociación con la mortalidad. La Escala de Depresión del Centro de Estudios Epidemiológicos (CES-D fue administrada a 3.867 residentes comunitarios. El riesgo de mortalidad como función del estado depresivo y de cada uno de los 4 factores de la CES-D fue estimado con el modelo de azar proporcional de Cox. Los participantes deprimidos (CES-D > 16 tuvieron un riesgo elevado de mortalidad (HR 1,23, 95% CI 1,03-1,49 después de la corrección de variables sociodemográficos. Quejas somáticas fue el único factor que predijo la mortalidad (HR 1,19, 95% CI 1,03-1,38. Después de excluir Quejas somáticas, la CES-D no predijo la mortalidad (HR 0,98, 95% CI 0,79-1,21. La asociación entre los síntomas depresivos de la CES-D y la mortalidad parece ser una función del factor Quejas somáticas. Es posible que la asociación entre los síntomas depresivos no somáticos y la mortalidad no sea tan robusta como indican los hallazgos anteriores.

  19. Revue bibliographique. Ultrastructure des Monogènes : liste des espèces et des organes étudiés

    Directory of Open Access Journals (Sweden)

    JUSTINE J-L.

    1993-01-01

    Full Text Available Les données bibliographiques (plus de 180 références concernant l'ultrastructure des monogènes, en microscopie électronique à balayage (MEB et microscopie électronique à transmission (MET, sont présentées sous la forme de deux listes. La liste des espèces étudiées indique pour chaque espèce les organes qui ont été décrits en microscopie électronique et la référence; plus de 60 espèces de Monopisthocotylea et 70 espèces de Polyopisthocotylea sont citées. La liste des organes indique pour chaque organe quelles espèces ont été étudiées et la référence. Les structures sont classées en: 1. Organes externes (morphologie externe en MEB, tégument, récepteurs tégumentaires, photorécepteurs, glandes, pièces sclérifiées du hapteur. 2. Organes internes non reproducteurs (appareil digestif, protonéphridies, cellules nerveuses. 3. Organes reproducteurs (canaux génitaux mâles, canaux génitaux femelles, ovogenèse et oeufs, oeufs en MEB, vitellogenèse, spermiogenèse et sperme. 4. Hyperparasites et symbiontes (microsporidies, bactéries et autres procaryotes, virus. Les travaux concernant des oncomiracidia ou des larves sont indiqués.

  20. Les clients des services d'escorte tels que perçus par des femmes offrant ces services

    Directory of Open Access Journals (Sweden)

    Jacqueline

    2015-07-01

    Full Text Available La discussion de projets de loi criminalisant l'achat des services sexuels constitue un sujet brûlant d'actualité dans plusieurs pays, dont le Canada. Pourtant, bon nombre d'études indiquent que la plupart des clients agissent de manière civilisée envers la personne travailleuse du sexe, alors que seule une infime minorité de clients présentent des comportements violents. Interviewant 16 femmes offrant des services d'escorte, quant à leur expérience de sexualité dans le cadre du travail, celles-ci ont beaucoup discuté des besoins qu'elles percevaient chez leurs clients, de même que des attitudes de ces derniers envers elles. Les participantes décrivent ceux-ci comme étant le plus souvent respectueux, la plupart recherchant un contact chaleureux avec elle et agissant en conséquence. En outre, ceux des clients qui ne recherchent qu'une expérience sexuelle tendent à être également respectueux envers l'escorte. Par contre, certains clients présentent une attitude ou un comportement désagréable. Quelques participantes ont également eu affaire à un client violent au cours de leur parcours comme escorte. La plupart des participantes étaient en mesure de choisir leurs clients, ce qui leur a permis de surtout rencontrer des clients aimables et qui, à l'occasion, leur procure également du plaisir sexuel. Par contre, les participantes plus vulnérables et moins capables de choisir et de maintenir leurs limites ont rencontré plus de clients désagréables ou agressifs.

  1. Sistemas de labranza y densidades de la batata: calidad del suelo y de las raíces tuberosas.

    Directory of Open Access Journals (Sweden)

    Maiby Pérez-Darniz

    2016-12-01

    Full Text Available El objetivo de este trabajo fue determinar el efecto de sistemas de labranza y densidades de siembra en la calidad de las raíces tuberosas de batata (Ipomoea batata (L Lamb.. El estudio se realizó en la Universidad Central de Venezuela, en el año 2014. Se determinaron los grados de severidad de la degradación del suelo y su correspondencia con las escalas de preferencia basadas en el peso unitario y dimensiones de la raíz tuberosa. Se usó un arreglo en franjas, donde los sistemas de labranza (SL fueron asignados a las parcelas, y las densidades de siembra (Ds a las franjas. Los SL consistieron en labranza vertical con cincel (LC, con arado de disco (LA, convencional con tres pases de rastra de disco (LCo y mínima con un pase de rastra de disco (LM. Las Ds fueron de 0,25 cm (D1 y 0,15 cm (D2 en la hilera. La calidad física del suelo fue superior en los tratamientos de LA. De estos, la combinación con la distancia de siembra más larga (LA-D1 favoreció la mayor calidad postcosecha del cultivo. Al contrario, en los tratamientos con cincel se promovió la menor aceptación del consumidor. La ligera a moderada severidad de la degradación del suelo no explicó la variación de la calidad postcosecha. Se in ere sobre la menor tasa de movimiento de agua en LC, que promovió un exceso de humedad y la más baja calidad de la raíz tuberosa.

  2. Modèles de maîtrise de risque dans la gestion des pièces de rechange

    OpenAIRE

    bounou , oumaima; EL BARKANY , Abdellah; EL BIYAALI , Ahmed

    2015-01-01

    International audience; La disponibilité d'un équipement de production est influencée par le temps de sa réparation. Ce dernier est aussi influencé par le temps pour obtenir une pièce de rechange ou de remplacement. Le temps d'obtention des pièces de rechange peut aussi influencer le niveau de l'inventaire des pièces de rechange qui est contraint par le coût de stock et la pénalité d'avoir une rupture de stock. Le jugement d'ingénierie et d'expérience sont utilisés dans l'analyse de risques e...

  3. Gravidez ectópica na cicatriz uterina de cesárea: relato de caso Cesarean scar ectopic pregnancy: a case report

    Directory of Open Access Journals (Sweden)

    Maurício de Souza Arruda

    2008-10-01

    Full Text Available Gravidez ectópica na cicatriz de cesárea é a forma mais rara de gravidez ectópica e provavelmente uma das mais perigosas em função dos riscos de ruptura e hemorragia volumosa. Essa situação deve ser diferenciada da gravidez cervical e de abortamento em curso, para que o tratamento apropriado seja imediatamente oferecido. Desde o advento da ultra-sonografia transvaginal, a gravidez ectópica na cicatriz de cesárea pode ser diagnosticada precocemente na gestação e, para isso o ultra-sonografista deve estar familiarizado com e atento aos critérios diagnósticos, especialmente em mulheres com cicatriz de cesárea prévia. Descrevemos aqui um caso de gravidez ectópica em cicatriz de cesárea, cujo diagnóstico foi tardio, havendo apresentação de involução espontânea.Ectopic pregnancy in a cesarean scar is the rarest form of ectopic pregnancy and probably the most dangerous one because of the risk of uterine rupture and massive hemorrhage. This condition must be distinguished from cervical pregnancy and spontaneous abortion in progress, so that the appropriate treatment can be immediately offered. Since the advent of endovaginal ultrasonography, ectopic pregnancy in a cesarean scar can be diagnosed early in pregnancy if the sonographer is familiarized with the diagnostic criteria of this situation, especially in women with previous cesarean scar. Here we describe a case of ectopic pregnancy in a cesarean scar in which the diagnosis was considerably late, with presentation of spontaneous regression.

  4. Complicaciones maternas de la cesárea en gestantes a término en periodo expulsivo en un hospital general de Lima, Perú

    Directory of Open Access Journals (Sweden)

    Javier Puma

    2015-01-01

    Full Text Available Objetivo: Describir las complicaciones maternas de la cesárea en gestantes a término en periodo expulsivo en un hospital general. Material y métodos: Estudio descriptivo, observacional, retrospectivo, tipo serie de casos, realizado en el Hospital Nacional Cayetano Heredia entre el 1 de enero de 2011 hasta el 31 diciembre de 2012. Se incluyeron 67 gestantes a término operadas en periodo expulsivo. Se revisaron las historias clínicas de las pacientes, se registraron las características clínicas y las complicaciones maternas. Resultados: En el periodo de estudio se realizaron 4 218 cesáreas, siendo el 1,84% hechas en periodo expulsivo. En general, 59/ 67 (88,1% presentaron algún tipo de complicación. Se observaron 8 casos de hipotonía uterina (11,9% y 2 (2,9% de atonía. En 5 (7,4% pacientes ocurrieron desgarros de segmento adyacente a la histerotomía, siendo 2 de ellos asociados a compromiso de cuerpo uterino y vagina, y 4 (5,9% casos a laceración de arteria uterina, uno fue bilateral. No se produjeron lesiones en tracto urinario ni digestivo y tampoco hubo necesidad de reintervención quirúrgica. Cuatro pacientes presentaron hemorragia puerperal, dos asociados a hipotonía uterina post cesárea. En 56 (83,5% casos ocurrió anemia post operatoria. Hubo 1 (1,5% caso de endometritis, 3 (4,5% infecciones de herida operatoria. Conclusiones: La cesárea realizada en período expulsivo ocasiona complicaciones frecuentes, algunas muy severas.

  5. Principales espèces médicinales utilisées en médecine vétérinaire ...

    African Journals Online (AJOL)

    Principales espèces médicinales utilisées en médecine vétérinaire au Bénin: disponibilité et caractéristiques dendrométriques. Irvine Yèïnou Minaflinou Sacca Sidi, Pascal Abiodoun Olounladé, Alain Yaoitcha, Vidjinnangni Fifamè Grâce Nadège Dedehou, Géorcelin Goué Alowanou, Erick Virgile Bertrand Azando, Mawulé ...

  6. Partos cesáreos no Piauí: tendência e fatores associados no período 2000-2011

    Directory of Open Access Journals (Sweden)

    Alberto Madeiro

    Full Text Available Resumo OBJETIVO: analisar a tendência da proporção de partos cesáreos e fatores associados no Piauí, Brasil, de 2000 a 2011. MÉTODOS: estudo de série temporal e transversal, com dados dos partos hospitalares de primíparas registrados no Sistema de Informações sobre Nascidos Vivos (Sinasc. RESULTADOS: a proporção de partos cesáreos aumentou de 34,4% em 2000 para 52,1% em 2011 (variação percentual anual +4,4; IC95% 3,6;5,1; mulheres brancas (RP=1,72; IC95% 1,63;1,86, com 40 anos ou mais de idade (RP=2,17; IC95% 2,09;2,28, com 12 anos ou mais de estudo (RP=1,86; IC95% 1,77;1,96, que realizaram sete ou mais consultas de pré-natal (RP=2,08; IC95% 1,97;2,18, residentes em municípios com mais de 300 mil habitantes (RP=1,68; IC95% 1,62;1,80 e com índice de desenvolvimento humano mais elevado (RP=1,61; IC95% 1,51;1,73 mostraram maiores proporções de partos cesáreos. CONCLUSÃO: a ocorrência de partos cesáreos foi elevada e mais frequente em mulheres de baixo risco obstétrico.

  7. Pérdida sanguínea y uso de hemoderivados en casos de cesárea e histerectomía por acretismo placentario

    Directory of Open Access Journals (Sweden)

    J.F. Solórzano Vázquez

    2017-06-01

    Conclusiones: Es una medida adecuada valorar las indicaciones de cesárea para evitar realizar procedimientos innecesarios y otorgar factor de riesgo para acretismo. Se debe realizar detección oportuna de acretismo placentario en pacientes con factor de riesgo para evitar cirugías de urgencia. El uso de hemoderivados es una piedra angular en el manejo de esta patología y debe ser oportuna.

  8. Teneurs azotée et minérale des espèces fourragères dominantes et ...

    African Journals Online (AJOL)

    SARAH

    31 mars 2016 ... sous abri, bien aérés, sans contact direct avec le soleil. Ils doivent être compacts et durs. RESULTATS. Teneur en Matières Azotées : Les résultats des analyses de la teneur en matières azotées des espèces. Bulbostylis laniceps,. Hyparrhenia wombaliensisi, Trachypogon spicatus et Ctenium newtonii.

  9. An Analysis of the Substitution Effect and of Revenue Effect in the Case of the Consumer’s Theory Provided with a CES Utility Function

    Directory of Open Access Journals (Sweden)

    Catalin Angelo Ioan

    2012-02-01

    Full Text Available In the consumer’s theory, a crucial problem is to determine the substitution effect and therevenue effect in the case of one good price’s modifing. There exists two theories due to John RichardHicks and Eugen Slutsky which allocates differentsshares of the total change of the consumption tothese effects. The paper makes an analysis betweenthe two effects, considering the general case of aCES utility function and introduces three indicators which will characterize these shares.

  10. Cross-Language Measurement Equivalence of the Center for Epidemiologic Studies Depression (CES-D) Scale in Systemic Sclerosis: A Comparison of Canadian and Dutch Patients

    Science.gov (United States)

    Kwakkenbos, Linda; Arthurs, Erin; van den Hoogen, Frank H. J.; Hudson, Marie; van Lankveld, Wim G. J. M.; Baron, Murray; van den Ende, Cornelia H. M.; Thombs, Brett D.

    2013-01-01

    Objectives Increasingly, medical research involves patients who complete outcomes in different languages. This occurs in countries with more than one common language, such as Canada (French/English) or the United States (Spanish/English), as well as in international multi-centre collaborations, which are utilized frequently in rare diseases such as systemic sclerosis (SSc). In order to pool or compare outcomes, instruments should be measurement equivalent (invariant) across cultural or linguistic groups. This study provides an example of how to assess cross-language measurement equivalence by comparing the Center for Epidemiologic Studies Depression (CES-D) scale between English-speaking Canadian and Dutch SSc patients. Methods The CES-D was completed by 922 English-speaking Canadian and 213 Dutch SSc patients. Confirmatory factor analysis (CFA) was used to assess the factor structure in both samples. The Multiple-Indicator Multiple-Cause (MIMIC) model was utilized to assess the amount of differential item functioning (DIF). Results A two-factor model (positive and negative affect) showed excellent fit in both samples. Statistically significant, but small-magnitude, DIF was found for 3 of 20 items on the CES-D. The English-speaking Canadian sample endorsed more feeling-related symptoms, whereas the Dutch sample endorsed more somatic/retarded activity symptoms. The overall estimate in depression scores between English and Dutch was not influenced substantively by DIF. Conclusions CES-D scores from English-speaking Canadian and Dutch SSc patients can be compared and pooled without concern that measurement differences may substantively influence results. The importance of assessing cross-language measurement equivalence in rheumatology studies prior to pooling outcomes obtained in different languages should be emphasized. PMID:23326538

  11. Nouvelles espèces d’Orchomene s.l. (Crustacea-Amphipoda) des fonds abyssaux. Affinités avec les autres Orchomene profonds

    NARCIS (Netherlands)

    Bellan-Santini, D.

    1990-01-01

    Deux espèces d’ Orchomene aveugles appartenant aux communautés benthiques abyssales sont décrites. O. kaikoi a été récolté dans le grand bivalve Calyptogena (Ectenagena) phaseoliformis provenant des fosses de subduction du Japon. O. stocki provient du lavage d’épongés du genre Cladorhiza récoltées

  12. The Factor Structure, Predictors, and Percentile Norms of the Center for Epidemiologic Studies Depression (CES-D Scale in the Dutch-speaking Adult Population of Belgium

    Directory of Open Access Journals (Sweden)

    Qian Wu

    2016-01-01

    Full Text Available The Center of Epidemiologic Studies Depression Scale (CES-D is a commonly used self-report scale to measure depressive symptoms in the general population. In the present study, the Dutch version of the CES-D was administered to a sample of 837 Dutch-speaking adults of Belgium to examine the factor structure of the scale. Using confirmatory factory analysis (CFA, four first-order models and two second-order models were tested, and the second-order factor model with three pairs of correlated error terms provided the best fit to the data. Second, five socio-demographic variables (age, gender, education level, relation status, and family history of depression were included as covariates to the second-order factor model to explore the associations between background characteristics and the latent factor depression using a multiple indicators and multiple causes (MIMIC approach. Age had a significantly negative effect on depression, but the effect was not substantial. Female gender, lower education level, being single or widowed, and having a family history of depression were found to be significant predictors of higher levels of depression symptomatology. Finally, percentile norms on the CES-D raw scores were provided for subgroups of gender by education level for the general Dutch-speaking adult population of Belgium.

  13. Vivência do parto normal ou cesáreo: revisão integrativa sobre a percepção de mulheres

    Directory of Open Access Journals (Sweden)

    Manuela Beatriz Velho

    2012-01-01

    Full Text Available Se realizó una revisión integradora para identificar la contribución de las investigaciones, a nivel nacional e internacional, sobre la percepción que experimentan las mujeres en el parto vaginal y la cesárea. La búsqueda de los artículos se hizo en las bases de datos MEDLINE, LILACS, BDENF, CINAHL y INDEXPSI, de 2000 a 2009, con la selección y análisis de 17 estudios, donde se presentan percepciones positivas y negativas de las mujeres sobre los dos tipos de parto: el papel de la mujer y una mejor recuperación en el parto vaginal, la falta de dolor en la cesárea, la insatisfacción con la atención recibida, y recomendaciones para la práctica obstétrica con sugerencias para futuras investigaciones. Los resultados indican aspectos sobre la atención que pueden contribuir a la satisfacción de las mujeres, y la necesidad de realizar otras investigaciones para entender mejor el proceso multidimensional del parto, ya sea por vía vaginal o cesárea.

  14. Posición comercial regional de los maíces mejorados generados por el INIFAP en Veracruz

    Directory of Open Access Journals (Sweden)

    Ana Lid del Angel-Pérez

    2016-01-01

    Full Text Available Introducción. El maíz es un cereal básico en la alimentación mexicana y el más cultivado por los agricultores. Sin embargo, la demanda de maíz para consumo y de semilla mejorada (SM, ha ocasionado fuertes importaciones, pues en 2012, se importaron 9´515,000 t. Gran parte de la demanda de SM es cubierta por empresas transnacionales, y en menor medida por pequeñas empresas privadas y organismos gubernamentales como el Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP. El objetivo del trabajo fue conocer el mercado regional de SM en el estado de Veracruz, la posición comercial del INIFAP y las variables relevantes que motiva la decisión de compra. Método. En 2015 se aplicó un cuestionario a 100 productores de maíz para grano, en ocho municipios del estado de Veracruz, mediante el muestreo Respondent-Driven Sampling (RDS. El instrumento consideró preguntas abiertas y cerradas de opción múltiple, para obtener información socioeconómica y perceptual sobre el conocimiento y uso de semillas mejoradas (SM de origen INIFAP o las que acostumbran sembrar. Resultados y discusión. El 75% del mercado regional de SM, las cubre el INIFAP. El mercado lo constituyen productores en pequeña escala (3.4 ha en promedio. La motivación de siembra depende de la Recomendación de amigos o familiares (p<0.0001. El uso de SM de origen INIFAP, está asociado a las variables socioeconómicas: Cercanía del lugar de compra (0.9451** y Conoce las semillas INIFAP (0.9199**, así como con el hecho de que los productores Siembran SM (0.4320** y Prefiere sembrar SM (0.3844** cuyos coeficientes de correlación son bajos pero fortalecidos por la significancia. Las variables de opinión que favorecen el uso de SM fueron: Tiene ventajas sobre los maíces criollos (0.6162** y Planta con buena arquitectura (0.3938**. Las características perceptuales importantes para el productor al consumir el grano fueron Sabor, Nixtamalizaci

  15. Référenceur et référencement. Cachez ces pratiques que je ne saurais voir

    Directory of Open Access Journals (Sweden)

    Guillaume Sire

    2014-04-01

    Full Text Available A partir d’entretiens réalisés chez des éditeurs de presse en ligne français, nous dressons le portrait de plusieurs employés en charge d’optimiser le référencement des documents produits par les journalistes sur les moteurs de recherche, et en particulier sur les listes de liens hypertextes ordonnées par le leader du marché : Google. Ces employés ont un profil hybride, fruit d’une mise en tension de trois composantes de la production : l’aspect technique, l’aspect marketing et l’aspect éditorial. Nous décrivons leurs parcours, leurs motivations et leur place dans l’organisation. Nous expliquons ensuite pourquoi ce que les référenceurs définissent eux-mêmes comme leur « éthique » n’est ni tout à fait celle de Google ni tout à fait celle des journalistes, mais qu’ils orientent leurs actions de manière à satisfaire autant que possible à la fois les critères d’évaluation de Google et la déontologie des journalistes. D’autre part, nous tâchons de montrer comment cet « invisible » de la production journalistique peut agir. Nous expliquons notamment en quoi son action peut avoir une influence sur la ligne éditoriale d’un site de presse, et en particulier sur le choix des sujets traités par les journalistes. Puis nous décrivons les enjeux liés aux négociations entre le référenceur et la rédaction, de l’issue desquelles dépendent en partie la nature et le résultat du processus de production journalistique. Finalement, deux choses distinctes dépendent de l’action du référenceur : d’une part la maximisation du trafic, d’autre part le contrôle exercé par l’entreprise de presse sur les modalités de publication et de diffusion de ses contenus. Si son action réussit parfaitement, l’internaute ne se doutera pas de la présence de certains éléments destinés à optimiser le référencement, car chacun de ces éléments aura un intérêt, et un sens, à ses yeux

  16. Efecto de la aplicación de elicitores sobre la producción de 4β-hidroxiwithanólido E, en raíces transformadas de Physalis peruviana L.

    OpenAIRE

    Piñeros-Castro, Yineth; Otálvaro-Álvarez, Ángela; Velásquez-Lozano, Mario

    2009-01-01

    Objetivo: Estudiar la producción del metabolito 4β-hidroxiwithanólido E, mediante el cultivo in vitro de raíces transformadas de uchuva (Physalis peruviana L.) y evaluar el efecto de la influencia de la aplicación de diferentes elicitores sobre la producción de dicho metabolito. Materiales y métodos: Se obtuvieron raíces transformadas de Physalis peruviana L. mediante infección con Agrobacterium rhizogenes C106. Se cultivaron las raíces transformadas en medio líquido Murashige & Skoog, durant...

  17. Efecto de la aplicación de elicitores sobre la producción de 4-hidroxiwithanólido E, en raíces transformadas de Physalis peruviana L.

    OpenAIRE

    Piñeros-Castro, Yineth; Programa de Ingeniería de Alimentos, Facultad de Ciencias Naturales, Universidad Jorge Tadeo Lozano. Carrera 4 # 22-60. Bogotá; Otálvaro-Álvarez, Ángela; Departamento de Ingeniería Química y Ambiental, Facultad de Ingeniería, Universidad Nacional de Colombia. Carrera 30 # 45-03. Bogotá; Velásquez-Lozano, Mario; Departamento de Ingeniería Química y Ambiental, Facultad de Ingeniería, Universidad Nacional de Colombia. Carrera 30 # 45-03. Bogotá

    2009-01-01

    Efecto de la aplicación de elicitores sobre la producción de 4b- hidroxiwithanólido E, en raíces transformadas de Physalis peruviana L.  Objetivo: Estudiar la producción del metabolito  4b-hidroxiwithanólido E,  mediante el cultivo in vitro de raíces transformadas de uchuva (Physalis peruviana L.) y evaluar el efecto de la influencia de la aplicación de diferentes elicitores sobre la producción de dicho metabolito.  Materiales y métodos: Se obtuvieron raíces transformadas de Physalis peruvian...

  18. Photofission of Even-Even Nuclei Near the Threshold; Photofission des Noyaux Pair-Pair au Voisinage du Seuil; 0424 041e 0422 041e 0414 0415 041b 0415 041d 0418 0415 0427 0415 0422 041d 041e - 0427 0415 0422 041d 042b 0425 042f 0414 0415 0420 0412 0411 041b 0418 0417 0418 041f 041e 0420 041e 0413 0410 ; Fotofision de los Nucleos Par-Par Cerca del Umbral

    Energy Technology Data Exchange (ETDEWEB)

    Rabotnov, N. S.; Smirenkin, G. N.; Soldatov, A. C.; Usachev, L. N. [Fiziko-Energeticheskij Institut, Obninsk, SSSR (Russian Federation); Kapica, S. P.; Cipenjuk, I. Ju.M. [Institut Fizicheskih Problem, Moskva, SSSR (Russian Federation)

    1965-07-15

    -Than-Or-Equal-To 6 MeV, les fissions liees a l'absorption quadripolaire des photons contribuent faiblement a la section efficace totale de fission. On montre pour la premiere fois que conformement aux previsions theoriques fondees sur le modele des voies de fission elabore par A. Bohr, le poids relatif de la composante quadripolaire ne joue un role important que lorsque les energies d'excitation sont inferieures au seuil de fission 'bipolaire' correspondant a la voie lv(K = 0). Ainsi, dans la distribution angulaire des fragments de photofission de {sup 238}U, lorsque le spectre du rayonnement de freinage presente une energie maximum E{sub max} = 5,4 MeV et 5,2 MeV, la contribution de la composante quadripdlaire a la section efficace totale de photofission s'eleve respectivement a 10 et 43%, alors-que pour E{sub max} > 6 MeV, elle ne depasse pas 3 a 3,5%. Parmi les noyaux fissiles Selon le mode pair-pair, l'effet de fission 'quadripolaire' apparaft le plus nettement pour {sup 240}Pu et moins nettement pour {sup 232}Th. Grace aux resultats de ces mesures on peut evaluer le rapport entre les sections efficaces partielles de photoabsorption dans les noyaux lourds. Les auteurs examinent la question de la parite de l'etat fondamental de {sup 239}Pu en tenant compte des resultats obtenus par les mesures de la distribution angulaire des fragments de photofission de {sup 239}Pu, qui revele une modification du signe de l'anisotropie conformement aux previsions theoriques relatives aux voies K = 1/2 et 3/2. (author) [Spanish] En la memoria se presentan los resultados de la medicion de las distribuciones angulares de los fragmentos formados en la fotofision del {sup 238}U, {sup 232}Th, {sup 240}Pu y {sup 239}Pu, en un haz de rayos gamma de frenado. Como fuente se utilizo el microtron de 12 MeV del Instituto de Problemas Fisicos de la Academia de Ciencias de la Union Sovietica. El empleo de esta fuente permitio medir la distribucion angular en el intervalo de energias gamma, importante pero aun

  19. Release of Fission Products from UC-ZrC Fuel Inserts; Degagement des produits de fission liberes dans des noyaux combustibles UC-ZrC; Vydelenie produktov deleniya iz topliv UC - ZrC; Liberacion de productos de fision por pastillas de combustible de UC-ZrC

    Energy Technology Data Exchange (ETDEWEB)

    Barth, F.; Von der Decken, C. B.; Schifferstein, K. [Brown Boveri/Krupp Reaktorbau G.M.B.H., Duesseldorf (Germany); Clauss, A.; Reichel, H.; Rygaert, J.; Ruston, W. R. [Societe d' Etudes de Recherches et d' Applications pour l' Industrie (S.E.R.A.I.), Brussels (Belgium)

    1963-11-15

    energies obtained from different types of pellets, although the values of D/r{sub 0}{sup 2} sometimes differed by four orders of magnitude at the same sample temperatures. After irradiation, the activities of the isotopes I{sup 131}, Sr{sup 85}, Ba{sup 140} and Ce{sup 141} were determined in the graphite of the capsules. Except for I{sup 131}, the activities were higher than those expected for a release by recoil only. The values for Sr{sup 89}, Ba{sup 140} and Ce{sup 141} are too high to be a result of a diffusion of their corresponding rare gas precursors. It is assumed that the measured isotopes or their non-rare gas precursors were released by diffusion. (author) [French] Les auteurs ont etudie sous irradiation, dans une boucle, le degagement des produits de fission liberes par des pastilles dont la composition approximative etait UC + 20 ZrC. Il s'agissait de verifier la possibilite d'utiliser ces pastilles comme noyaux d'elements combustibles spheriques pour le reacteur a haute temperature actuellement construit a Juliers par la societe Brown-Boveri/Krupp Reaktorbau GmbH. Les essais ont ete faits sur des pastilles encapsulees dans du graphite et sur des pastilles non encapsulees. La surface de certaines pastilles etait constituee par une couche de carbure de zirconium pur d'une epaisseur de 1 a 2 mm. Les echantillons ent ete places dans des fours electriques a resistance pouvant atteindre une temperature de 1600{sup o}C. Pendant l'irradiation, les flux de neutrons etaient de 3 a 4 x 10{sup 10}n/cm{sup 2}s. La boucle permettait de mesurer, pendant l'irradiation, le degagement de {sup 85m}Kr, {sup 87}Kr, {sup 88}Kr, {sup 133}Xe et {sup 135}Xe et de determiner indirectement les quantites de {sup 133}I et {sup 135}I, apres l'arret du reacteur. Le degagement minimum de {sup 131}I, {sup 89}Sr, {sup 140}Ba et {sup 141}Ce a ete determine radiochimiquement apres retrait des echantillons. Il a ete egalement possible de mesurer la fraction de recul {epsilon}{sub R} seule, le

  20. Saddle-Point Rotational States from Resonance Fission of Oriented Nuclei; Etats Rotationnels a l'Etranglement Resultant de la Fission, par Neutrons de Resonance, de Noyaux Orientes; 0412 0420 0410 0429 0410 0422 0415 041b 042c 041d 042b 0415 0421 041e 0421 0422 041e 042f 041d 0418 042f 0421 0415 0414 041b 041e 0412 041e 0419 0422 041e 0427 K 0418 0412 0420 0415 0417 0423 041b 042c 0422 0410 0422 0415 0420 0415 0417 041e 041d 0410 041d 0421 041d 041e 0413 041e 0414 0415 041b 0415 041d 0418 042f 041e 0420 0418 0415 041d 0422 0418 0420 041e 0412 0410 041d 041d 042b 0425 042f 0414 0415 0420 ; Estados Rotacionales en el Punto de Estrangulacion Debidos a la Fision por Resonancia de Nucleos Orientados

    Energy Technology Data Exchange (ETDEWEB)

    Dabbs, J. W.T.; Walter, F. J.; Parker, G. W. [Oak Ridge National Laboratory, Oak Ridge, TN (United States)

    1965-07-15

    consistent with other data such as the variation of peak-to-valley ratio of Faler and Tromp; thus the rather strong indication that J(0.3 eV) {ne} J(1.14 eV) should not yet be accepted as conclusive. Further measurements are in progress. (author) [French] Il est possible d'aligner des noyaux des actinides U, Np et Pu dans les composes XO{sub 2}Rb(NO{sub 3}){sub 3} par interaction du moment quadrupolaire du noyau avec le gradient du champ electrique du cristal, en refroidissant tout simplement le monocristal interessant. Un alignement de ce genre correspond a une distribution angulaire non uniforme, dans l'espace, de l'axe de symetrie du noyau compose, qui reflete en premier lieu la valeur de K. Si l'on suppose que les fragments presentent cette meme distribution, on arrive a une methode qui permet d'etablir le nombre quantique-K a l'etranglement. Des experiences faites a Oak Ridge sur des noyaux alignes de {sup 233}U et de {sup 235}U a 1,2 Degree-Sign K et avec des neutrons thermiques ont deja fait l'objet d'articles dans des revues. Depuis, ces experiences ont ete etendues aux energies des neutrons de resonance et a des temperatures de l'ordre de 0,5 Degree-Sign K. Faite conjointement avec des determinations directes (a l'aide de neutrons polarises et de noyaux polarises) des valeurs de J associees a chaque resonance, la nouvelle serie d'experiences permet de se faire une idee beaucoup plus exacte du nombre et de la nature des voies de fission disponibles; il s'agit la de questions qui se posent depuis longtemps en matiere dcfission. Dans {sup 235}U, une anisotropie des fragments de fission approchant le maximum possible a ete relevee pour les resonances de 1,14 et 8,8 eV, avec le signe contraire de celui qui avait ete trouve anterieurement pour les particules alpha. En outre, une diminution considerable de l'anisotropie a ete observee pour les energies neutroniques dans le voisinage de la resonance bien connue de 0,3 eV. En l'absence de renseignements directs sur les

  1. Somatic, positive and negative domains of the Center for Epidemiological Studies Depression (CES-D) scale: a meta-analysis of genome-wide association studies.

    Science.gov (United States)

    Demirkan, A; Lahti, J; Direk, N; Viktorin, A; Lunetta, K L; Terracciano, A; Nalls, M A; Tanaka, T; Hek, K; Fornage, M; Wellmann, J; Cornelis, M C; Ollila, H M; Yu, L; Smith, J A; Pilling, L C; Isaacs, A; Palotie, A; Zhuang, W V; Zonderman, A; Faul, J D; Sutin, A; Meirelles, O; Mulas, A; Hofman, A; Uitterlinden, A; Rivadeneira, F; Perola, M; Zhao, W; Salomaa, V; Yaffe, K; Luik, A I; Liu, Y; Ding, J; Lichtenstein, P; Landén, M; Widen, E; Weir, D R; Llewellyn, D J; Murray, A; Kardia, S L R; Eriksson, J G; Koenen, K; Magnusson, P K E; Ferrucci, L; Mosley, T H; Cucca, F; Oostra, B A; Bennett, D A; Paunio, T; Berger, K; Harris, T B; Pedersen, N L; Murabito, J M; Tiemeier, H; van Duijn, C M; Räikkönen, K

    2016-06-01

    Major depressive disorder (MDD) is moderately heritable, however genome-wide association studies (GWAS) for MDD, as well as for related continuous outcomes, have not shown consistent results. Attempts to elucidate the genetic basis of MDD may be hindered by heterogeneity in diagnosis. The Center for Epidemiological Studies Depression (CES-D) scale provides a widely used tool for measuring depressive symptoms clustered in four different domains which can be combined together into a total score but also can be analysed as separate symptom domains. We performed a meta-analysis of GWAS of the CES-D symptom clusters. We recruited 12 cohorts with the 20- or 10-item CES-D scale (32 528 persons). One single nucleotide polymorphism (SNP), rs713224, located near the brain-expressed melatonin receptor (MTNR1A) gene, was associated with the somatic complaints domain of depression symptoms, with borderline genome-wide significance (p discovery = 3.82 × 10-8). The SNP was analysed in an additional five cohorts comprising the replication sample (6813 persons). However, the association was not consistent among the replication sample (p discovery+replication = 1.10 × 10-6) with evidence of heterogeneity. Despite the effort to harmonize the phenotypes across cohorts and participants, our study is still underpowered to detect consistent association for depression, even by means of symptom classification. On the contrary, the SNP-based heritability and co-heritability estimation results suggest that a very minor part of the variation could be captured by GWAS, explaining the reason of sparse findings.

  2. Palpitando la modernidad: el negocio de bienes raíces en Cali (Colombia) a partir del caso de Jorge Garcés Borrero, 1900-1944

    OpenAIRE

    María Fernanda Erazo Obando

    2014-01-01

    El objetivo del presente artículo es analizar el movimiento de compra y venta de bienes raíces en Cali (Colombia) durante la primera mitad del siglo XX. Para ello, se toma como referencia la empresa del comerciante Jorge Garcés Borrero, la cual, se enfocó principalmente en la ejecución de este tipo de negocios. Dicha empresa, a pesar de no haberse constituido legal y jurídicamente, presentó las características de una compañía como tal, generando importantes inversiones y ganancias a partir de...

  3. Producción de metabolitos secundarios en cultivo de raíces in vitro y suspensiones celulares de Ipomoea carnea spp. carnea Jacq.

    OpenAIRE

    Rojas Idrogo, Consuelo; Kato, Massuo J.; Delgado-Paredes, Guillermo E.; Segal Floh, Eny Iochevet; Handro, Walter

    2014-01-01

    Ipomoea carnea spp. carnea Jacq. es un arbusto dominante en el bosque estacionalmente seco del Perú y Ecuador. Los cultivos de raíces fueron establecidos en medio MS con diferentes concentraciones de AIB, sacarosa y combinaciones de AIB-sacarosa. Diversos explantes obtenidos de plántulas in vitro y plantas silvestres se cultivaron en diferentes combinaciones de 2,4-D, AIA, ANA y BAP, para inducir callos friables, dependiendo del tipo de explante y los reguladores de creci...

  4. Une quête d’identité par le détour : ''Dans ces bras-là'', de Camille Laurens

    Directory of Open Access Journals (Sweden)

    Dominique Almeida Rosa de Faria

    2009-01-01

    Full Text Available Scholarly linking between autobiographical elements, fiction, and diversion of conventions are characteristic of Camille Laurens’work. Dans ces bras-là (2000 can be described as a search for identity by the detour of the other. Indeed, the novel is built on three dichotomous relations namely autobiography-fiction, woman-man and writing-oral language. The result is a complex and deep look at Camille Laurens’ identity: a woman, an author, but also the narrator of a narrative

  5. Génomique comparative et évolutive au sein du complexe d’espèces Leptosphaeria maculans-Leptosphaeria biglobosa

    OpenAIRE

    Grandaubert, Jonathan

    2013-01-01

    Leptosphaeria maculans ‘brassicae’ (Lmb) est un champignon filamenteux de la classe des Dothideomycètes faisant partie du complexe d’espèces Leptosphaeria maculans-Leptosphaeria biglobosa composé d’agents pathogènes des crucifères. Lmb est particulièrement adapté au colza (Brassica napus) et provoque la maladie qui lui est la plus dommageable : la nécrose du collet. Dans le but de mieux comprendre et contrôler cette maladie, l’équipe d’accueil a initié un projet de génomique visant à identifi...

  6. Respiración microbial y de raíces en suelos de bosques tropicales primarios y secundarios (porce, colombia).

    OpenAIRE

    Ramírez Palacio, Álvaro Andrés; Moreno Hurtado, Flavio Humberto

    2011-01-01

    Los suelos son el mayor reservorio de carbono en los ecosistemas terrestres y a su vez la mayor fuente de CO2 atmosférico, el cual es producido mediante un proceso denominado respiración del suelo. El objetivo de este trabajo fue estimar las tasas de respiración del suelo y sus componentes (respiración de raíces y de microorganismos), y evaluar el control que sobre las tasas de emisión de CO2 ejercen factores como la humedad y la temperatura del suelo, en bosques primarios (BP) y secundarios ...

  7. Las cesáreas en México: tendencias, niveles y factores asociados Caesarean sections in Mexico: tendencies, levels and associated factors

    Directory of Open Access Journals (Sweden)

    Esteban Puentes-Rosas

    2004-02-01

    Full Text Available OBJETIVO: Describir el comportamiento de las cesáreas en México en los últimos 10 años y medir su relación con distintas variables. MATERIAL Y MÉTODOS: Estudio ecológico en el que se utilizó la base de datos de nacimientos atendidos en instituciones de salud públicas y privadas que concentra la Secretaría de Salud de México. La variable dependiente fue el tipo de atención del parto. Las variables independientes fueron el producto interno bruto per cápita, el índice de desarrollo humano, el porcentaje de analfabetismo de las mujeres, el nivel de marginación y el porcentaje de médicos especialistas, entre otras. La relación entre las variables en estudio se midió con las pruebas de correlación de Pearson y de Spearman. Con los datos de 1999 se realizó un análisis de regresión lineal múltiple para identificar las principales variables asociadas con el porcentaje de cesáreas por entidad federativa. RESULTADOS: El porcentaje de nacimientos por cesárea en el ámbito nacional se incrementó en los últimos 10 años a un ritmo ligeramente superior a 1% anual. El ritmo de crecimiento fue considerablemente mayor en la seguridad social y el sector privado. El porcentaje de cesáreas a escala nacional en 1999 fue ligeramente superior a 35%. Los valores más altos correspondieron al sector privado con 53%. Las instituciones de seguridad social presentaron un porcentaje de cesáreas de 38.2%. Las variables con valores de asociación más intensa con el porcentaje de cesáreas fueron el porcentaje de médicos que son especialistas en el estado y el producto interno bruto per cápita. DISCUSIÓN: Los resultados presentados respaldan las opiniones que defienden la implantación de políticas correctivas específicas, con el fin de impulsar un descenso en la frecuencia de cesáreas. En otros contextos se han producido descensos importantes con requisitos como la solicitud de una segunda opinión antes de realizar una cesárea, la definici

  8. Fatores prognósticos para o parto transvaginal em pacientes com cesárea anterior Prognostic factors for vaginal delivery after cesarian section

    Directory of Open Access Journals (Sweden)

    Luiz Carlos Santos

    1998-07-01

    Full Text Available O objetivo deste estudo foi determinar os fatores prognósticos para a ultimação do parto por via transpélvica em gestantes com cesárea anterior admitidas em trabalho de parto no CAM-IMIP. Foi realizado um estudo tipo caso-controle, analisando os partos de pacientes com cesárea prévia assistidos no CAM-IMIP no período de janeiro/1991 a dezembro/1994. Foram considerados casos as pacientes com cesárea anterior (n=156 e controles as que tiveram parto transvaginal (n=338. Os critérios de inclusão foram: idade gestacional > 36 semanas, cesárea anterior há pelo menos 1 ano, concepto vivo, trabalho de parto espontâneo e apresentação cefálica fletida. Foram excluídas as gestações de alto risco, os casos de sofrimento fetal anteparto e pacientes com história de parto transpélvico anterior depois da cesárea. A análise estatística foi realizada em Epi-Info 6.0 e Epi-Soft, utilizando-se os testes chi² de associação, teste exato de Fisher e "t" de Student, bem como a odds ratio e seu intervalo de confiança a 95%. Análise de regressão logística múltipla foi efetuada para controle das variáveis confundidoras. O percentual de cesáreas no grupo estudado foi de 31,6%. Os fatores maternos que apresentaram associação significativa com o parto transvaginal foram a idade materna 35 anos (OR = 0,54, IC a 95% = 0,36-0,82, a história de parto vaginal anterior (OR = 1,6, IC a 95% = 1,01-2,55 e a indicação da cesárea anterior por doenças da gestação (OR = 3,67, IC a 95% = 1,19-12,02. Fatores como intervalo entre a cesárea anterior e o parto atual, outras indicações de cesárea e o tipo de histerorrafia não apresentaram associação significativa com o parto transpélvico. No modelo de regressão logística múltipla, persistiram como variáveis associadas significativamente ao parto vaginal a idade materna e a história de parto vaginal anterior. Os autores concluíram que sendo a idade materna Objectives: to determine

  9. CORRELACIÓN ENTRE LAS CARACTERÍSTICAS DEL SUELO Y LOS NEMATODOS DE LAS RAÍCES DEL BANANO (Musa AAA EN ECUADOR

    Directory of Open Access Journals (Sweden)

    C\\u00E9sar Ch\\u00E1vez-Velazco

    2009-01-01

    Full Text Available El objetivo del presente trabajo fue correlacionar las características físico-químicas del suelo con el peso de raíces y su número de nematodos en banano. Se emplearon muestras pareadas de cinco hectáreas de banano en una plantación comercial del Ecuador en el 2006. En 120 unidades de producción se tomaron las muestras de raíces y suelo. Se hizo análisis físico y químico del suelo y sus valores se correlacionaron con peso de raíz total, funcional y número de nematodos presentes en las raíces de banano. De las variables de suelo estudiadas, cuatro se asociaron con peso de raíz total, nueve con el de raíz funcional, cinco con el número de Radopholus similis, seis con el de Helicotylenchus spp., cuatro con el de Pratylenchus spp. y nueve con el de nematodos totales. De las características físicas (contenidos de arena, limo y arcilla estudiadas, un 50 % correlacionaron ya fuera con el peso de raíces o número de nematodos, mientras de las químicas, solamente se encontró correlación en 15 % de las relaciones estudiadas. A pesar de la significancia estadística, el valor de correlación fue bajo o muy bajo, con un máximo de r= 0,53; P< 0,0001 para el contenido de arena y número de nematodos totales. Los resultados sugieren futuros estudios en dos líneas: el efecto de la nutrición en el número y daño de los nematodos y el efecto de los nematodos en la absorción de nutrientes.

  10. Conséquences industrielles et écologiques de l'introduction de nouvelles espèces dans les hydrosystèmes continentaux : la moule zébrée et autres espèces invasives

    Directory of Open Access Journals (Sweden)

    KHALANSKI M.

    1997-01-01

    Full Text Available Les eaux de surface sont prélevées pour divers usages industriels, parmi lesquels la production d'énergie électrique représente une large part. Dans les circuits d'eau brute se fixent de nombreuses espèces d'organismes aquatiques, qui perturbent le fonctionnement des installations et sont susceptibles d'entraîner l'indisponibilité de certaines d'entre elles. Dans certains cas, l'irruption de nouvelles espèces pose un problème grave à l'industrie. L'introduction de deux espèces de moules zébrées (genre Dreissena dans les Grands Lacs américains, puis leur extension progressive vers le sud des États-Unis au cours des dernières années, se chiffre par un dommage pour l'industrie estimé à cinq milliards de dollars par an en 2000. L'impact écologique de la moule zébrée en Amérique du Nord a fait l'objet de nombreux travaux ; dans la phase d'extension rapide de l'espèce, il semble significatif. En Europe, la moule zébrée constitue aussi une menace pour les circuits industriels ; c'est pourquoi cette espèce a fait l'objet de nombreuses études, notamment en France sur la Seine, le Rhône et la Moselle. Deux nouvelles espèces invasives sont récemment apparues dans les cours d'eau européens : il s'agit du clam asiatique Corbicula fluminea et d'un amphipode : Corophium curvispinum. Elles s'ajoutent à la liste faunistique des organismes observés dans les circuits de centrales thermiques installées sur les cours d'eau français : spongiaires, hydraires, bryozoaires, mollusques. Pour assurer la disponibilité des circuits, il faut pouvoir contrôler le développement de ces espèces ; ce qui implique une connaissance approfondie de leur biologie et de leur écologie. Les méthodes de lutte actuellement mises en oeuvre au plan industriel, ou qui sont à l'étude, sont brièvement passées en revue.

  11. A novel phylogeny of the Gelidiales (Rhodophyta) based on five genes including the nuclear CesA, with descriptions of Orthogonacladia gen. nov. and Orthogonacladiaceae fam. nov.

    Science.gov (United States)

    Boo, Ga Hun; Le Gall, Line; Miller, Kathy Ann; Freshwater, D Wilson; Wernberg, Thomas; Terada, Ryuta; Yoon, Kyung Ju; Boo, Sung Min

    2016-08-01

    Although the Gelidiales are economically important marine red algae producing agar and agarose, the phylogeny of this order remains poorly resolved. The present study provides a molecular phylogeny based on a novel marker, nuclear-encoded CesA, plus plastid-encoded psaA, psbA, rbcL, and mitochondria-encoded cox1 from subsets of 107 species from all ten genera within the Gelidiales. Analyses of individual and combined datasets support the monophyly of three currently recognized families, and reveal a new clade. On the basis of these results, the new family Orthogonacladiaceae is described to accommodate Aphanta and a new genus Orthogonacladia that includes species previously classified as Gelidium madagascariense and Pterocladia rectangularis. Acanthopeltis is merged with Gelidium, which has nomenclatural priority. Nuclear-encoded CesA was found to be useful for improving the resolution of phylogenetic relationships within the Gelidiales and is likely to be valuable for the inference of phylogenetic relationship among other red algal taxa. Copyright © 2016 Elsevier Inc. All rights reserved.

  12. MACROINVERTEBRADOS ASOCIADOS A LAS RAÍCES SUMERGIDAS DEL MANGLE ROJO (Rhizophora mangle EN LAS BAHÍAS TURBO Y EL UNO, GOLFO DE URABÁ (CARIBE COLOMBIANO

    Directory of Open Access Journals (Sweden)

    GARCÍA PADILLA JESÚS MARÍA

    2010-05-01

    Full Text Available Con el fin de establecer el comportamiento de la salinidad y las características de la fauna de macroinvertebrados asociados a las raíces de Rhizophora mangle en las Bahías de Turbo y El Uno, se realizaron cuatro muestreos entre septiembre del 2004 y febrero del 2005, en tres sectores de las Bahías. Los valores de salinidad experimentaron cambios muy importantes en el tiempo y fluctuaron entre 2 y 32 unidades. En total, se cuantificaron 26 especies en Bahía Turbo y 28 en Bahía El Uno. Mientras la diversidad en la Bahía Turbo varió entre 0,77 en septiembre y 2,22 noviembre, en Bahía El Uno, los valores fluctuaron entre 1,14 en noviembre y 1,95 en septiembre. La mayoría de las especies son frecuentes en las raíces de mangle de la región caribe y poseen un carácter eurihalino.

  13. A prova de trabalho de parto aumenta a morbidade materna e neonatal em primíparas com uma cesárea anterior?

    Directory of Open Access Journals (Sweden)

    Matias Jacinta Pereira

    2003-01-01

    Full Text Available OBJETIVO: comparar a morbidade materna e os resultados neonatais, bem como algumas características clínicas e epidemiológicas de primíparas com uma cesárea anterior, segundo a realização de cesárea eletiva (CE ou prova de trabalho de parto (PTP no segundo parto. PACIENTES E MÉTODO: trata-se de estudo de corte transversal retrospectivo do segundo parto em mulheres com uma cesárea prévia, atendidas no Centro de Atenção Integral à Saúde da Mulher (CAISM/UNICAMP, no período de 1986 a 1998. Os dados foram obtidos de 2068 prontuários clínicos que correspondiam a 322 casos de CE e 1746 de PTP. A análise dos dados foi realizada pela distribuição percentual dos casos de CE e PTP e das categorias das variáveis nestes dois grupos, com a diferença estatística avaliada pelos testes chi2, chi2 para tendência (chi2 trend e exato de Fisher, com nível de significância de 95%. RESULTADO: a indicação de CE diminuiu progressivamente com o tempo, passando de 22,6% em 1986 para 5% em 1998. A morbidade materna foi semelhante e reduzida nos dois grupos (1,24 e 1,21%. Não houve diferença significativa entre os grupos quanto ao índice de Apgar e natimortalidade, mas notou-se proporção significativamente maior de RN prematuros e com peso 4.000 g no grupo submetido à CE. A prevalência de CE foi significativamente maior em mulheres com idade >35 anos, história pregressa ou atual de síndrome hipertensiva, diabetes ou primeiro filho morto, bem como com alterações no volume do líquido amniótico. CONCLUSÕES: A realização da PTP aumentou progressivamente ao longo dos treze anos, sem aumento na morbidade materna e/ou neonatal. As indicações de CE obedeceram critério médico relacionado às condições clínicas maternas e/ou fetais desfavoráveis ao parto vaginal.

  14. Measurement of the production of K{sup +} mesons by protons in nuclei (1960); Mesure de la production des mesons K{sup +} par des protons dans les noyaux (1960)

    Energy Technology Data Exchange (ETDEWEB)

    Teiger, J [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1960-07-01

    K{sup +} mesons produced by the internal proton beam of Saturne have been identified by means of scintillation and Cerenkov counters. The production cross sections are given per target nucleus measured at a laboratory angle of 35 deg. as well as the cross section relative to {pi}{sup +} mesons of the same momentum for: - incident protons of kinetic energy between 1.3 and 2.8 GeV, - targets of C, Cu and Pb, - K{sup +} produced with kinetic energies between 0.45 and 0.65 GeV. From these results we have tried to deduce the importance of indirect production by intermediate {pi} mesons with respect to direct production by proton-nucleon collisions. (author) [French] Au moyen de detecteurs a scintillations et a rayonnement Cerenkov, on a identifie les mesons lourds K{sup +} produits par les protons du faisceau interne de 'Saturne'. On donne les sections efficaces de production, par noyau cible, mesurees a 35 deg. dans le laboratoire, ainsi que les sections efficaces relatives par rapport aux mesons {pi}{sup +} de meme impulsion pour: - des protons incidents d'energie cinetique entre 1,3 GeV et 2,8 GeV, - des cibles de C, de Cu et de Pb, - des K{sup +} produits avec des energies cinetiques entre 0,45 et 0,65 GeV. De ces resultats, on a essaye de deduire l'importance de la production indirecte, par mesons {pi} intermediaires, par rapport a la production directe dans un choc proton-nucleon. (auteur)

  15. The effects of duration of pre-soaking treatments on the frequency and spectrum of mutations induced by sodium azide in CES 14 Mungbean variety

    International Nuclear Information System (INIS)

    Asencion, A.B.

    1982-04-01

    Seeds of mungbean variety CES 14 were treated with 10 - 3 sodium azide for 2 hours buffered at pH 3 after various pre-soaking treatment durations of 0, 4, 6, 8, 10, 12, 14 and 16 hours. The biological parameters that were significantly affected by the treatments in the M 1 were germination, seedling height and survival. The chlorophyll and other morphological mutations in the M 2 gradually increased with increasing pre-soaking time. The treatment that had the lowest mutation rate was the 16-hour pre-soaked seeds. No chlorophyll mutation was noted in both the water and buffer control. One variant was noted, however, in the buffer control. (author)

  16. [Confirmatory factor analysis of the short French version of the Center for Epidemiological Studies of Depression Scale (CES-D10) in adolescents].

    Science.gov (United States)

    Cartierre, N; Coulon, N; Demerval, R

    2011-09-01

    Screening depressivity among adolescents is a key public health priority. In order to measure the severity of depressive symptomatology, a four-dimensional 20 items scale called "Center for Epidemiological Studies-Depression Scale" (CES-D) was developed. A shorter 10-item version was developed and validated (Andresen et al.). For this brief version, several authors supported a two-factor structure - Negative and Positive affect - but the relationship between the two reversed-worded items of the Positive affect factor could be better accounted for by correlated errors. The aim of this study is triple: firstly to test a French version of the CES-D10 among adolescents; secondly to test the relevance of a one-dimensional structure by considering error correlation for Positive affect items; finally to examine the extent to which this structural model is invariant across gender. The sample was composed of 269 French middle school adolescents (139 girls and 130 boys, mean age: 13.8, SD=0.65). Confirmatory Factorial Analyses (CFA) using the LISREL 8.52 were conducted in order to assess the adjustment to the data of three factor models: a one-factor model, a two-factor model (Positive and Negative affect) and a one-factor model with specification of correlated errors between the two reverse-worded items. Then, multigroup analysis was conducted to test the scale invariance for girls and boys. Internal consistency of the CES-D10 was satisfying for the adolescent sample (α=0.75). The best fitting model is the one-factor model with correlated errors between the two items of the previous Positive affect factor (χ(2)/dl=2.50; GFI=0.939; CFI=0.894; RMSEA=0.076). This model presented a better statistical fit to the data than the one-factor model without error correlation: χ(2)(diff) (1)=22.14, pstatistic for the model with equality-constrained factor loadings was 121.31. The change in the overall Chi(2) is not statistically significant. This result implies that the model is

  17. Polihidroxialcanoatos de cepas de Azospirillum spp. aisladas de raíces de Lycopersicon esculentum Mill. “tomate” y Oryza sativa L. “arroz” en Lambayeque

    Directory of Open Access Journals (Sweden)

    Katty Baca

    2010-01-01

    Full Text Available En este trabajo se determinó la concentración de polihidroxialcanoatos (PH As de cepas de Azospirillum aisladas de raíces de Lycopersicon esculentum Mill. “tomate” y Oryza sativa L. “arroz”, como una alternativa ante la acumulación de plásticos derivados del petróleo. R aíces previamente desinfectadas se sembraron en medio Nfb se misólido, donde las bacterias fijadoras de nitrógeno se reconocieron por una película blanquecina bajo la superficie y el viraje del indicador al azul. El género Azospirillum se identificó en medio rojo de Congo, obteniéndose 96 cepas de A. lipoferum y A. brasilense en tomate y arroz. Se realizó una fermentación discontinua con caldo Azotobacter modificado, alimentando con una solución saturada de ácido málico cada 12 horas y se realizaron tinciones con Sudán Negro B. Se seleccionaron las cepas con mayor nú mero de gránulos de PHAs (en tomate , 18 de A. lipoferum y 2 de A. brasilense y en arroz, 10 de A. lipoferum y 10 de A. brasilense y se cuantificó la biomasa y PHAs. La concentración de PHAs alcanzó 0 . 661 gL - 1 en A. lipoferum KM(T - 73 y 0 . 738 gL - 1 en A. br asilense KM(T - 19. Las cepas de A. lipoferum y A. brasilense aisladas de tomate alcanzaron una mayor concentración de biomasa y PHAs frente a las cepas aisladas de arroz.

  18. DOMMAGES CAUSÉS À LA MOLECULE D’ADN PAR LES EFFETS CONJUGUÉS DE DEUX DISTRIBUTIONS D’ESPÈCES RADIOLYTIQUES

    Directory of Open Access Journals (Sweden)

    M.E.K ABDELMOUMENE

    2009-06-01

    Full Text Available L’ADN, support de l’information génétique de la cellule, est la cible la plus importante lors d’une exposition à un rayonnement ionisant (radiothérapie, scintigraphie…. Sa dégradation est à l’origine de désordres cellulaires dramatiques comme la cancérisation. Pour quantifier ces effets, nous avons considéré deux électrons d’énergie incidente 1 KeV qui traversent un milieu aqueux fournissant chacun une distribution de  radicaux libres (e-aq, H,OH, H+aq, H2, H2O2, OH-, O2, O-2, OH2, OH2- que nous avons fait évoluer selon un ensemble de codes informatiques élaborés sur un modèle déterministe jusqu’à leur collision et estimer ainsi la concentration et le rendement de chaque espèce. Dans cette étude, nous n’avons considéré queles espèces les plus agressives vis à vis des molécules biologiques e-aq, H et plus particulièrement l’hydroxyle OH. Nous avons ainsi estimé le nombre moyensde diverses lésions portées à l’ADN. L’intérêt essentiel de cette étude est lamise au point d’un modèle simple d’adaptation facile du point de vue applications qui peut renseignersur les dommages causés à une molécule aussi importante que l’ADN.

  19. CesRK, a two-component signal transduction system in Listeria monocytogenes, responds to the presence of cell wall-acting antibiotics and affects beta-lactam resistance

    DEFF Research Database (Denmark)

    Kallipolitis, Birgitte H; Ingmer, Hanne; Gahan, Cormac G

    2003-01-01

    Listeria monocytogenes is a food-borne pathogen that can cause a variety of illnesses ranging from gastroenteritis to life-threatening septicemia. The beta-lactam antibiotic ampicillin remains the drug of choice for the treatment of listeriosis. We have previously identified a response regulator...... of L. monocytogenes to tolerate ethanol and cell wall-acting antibiotics of the beta-lactam family. Furthermore, CesRK controls the expression of a putative extracellular peptide encoded by the orf2420 gene, located immediately downstream from cesRK. Inactivation of orf2420 revealed that it contributes...... to ethanol tolerance and pathogenesis in mice. Interestingly, we found that transcription of orf2420 was strongly induced by subinhibitory concentrations of various cell wall-acting antibiotics, ethanol, and lysozyme. The induction of orf2420 expression was abolished in the absence of CesRK. Our data suggest...

  20. Eficacia de la administración de betametasona antes de la cesárea electiva para prevenir el síndrome de distres respiratorio en recién nacidos a término

    OpenAIRE

    Guerrero Domínguez, Lorena Janeth

    2016-01-01

    Objetivo: Determinar la eficacia de la administración de Betametasona antes de la cesárea electiva para reducir el Síndrome de Distres Respiratorio, en recién nacidos a término. Materiales y Método: Con un estudio clínico experimental aleatorizado, simple ciego, se determinó la eficacia de Betametasona, para reducir la frecuencia de Distres Respiratorio en recién nacidos a término por cesárea electiva. Un total de 166 mujeres embarazadas fueron aleatorizadas a dos grupos: Grupo A o tratami...

  1. 2678-IJBCS-Article-Abla Dela Mondedji

    African Journals Online (AJOL)

    hp

    l'envahissement de la flore forestière togolaise par les espèces végétales exotiques : cas du neem (Azadirachta indica). Mémoire de D.E.A., Université de Lomé, 61p. Kranthi KR, Jadhav D, Wanjari R, Kranrhi S,. Russel D. 2001. Pyrethroid resistance and mechanisms of resistance in field strains of Helicoverpa armigera.

  2. EFECTO DE LA EXTRACCIÓN DE RAÍCES AÉREAS SOBRE LAS POBLACIONES DE “TRIPEPERRO” (PHILODENDRON LONGIRRHIZUM, ARACEAE EN LOS ANDES CENTRALES DE COLOMBIA

    Directory of Open Access Journals (Sweden)

    García Nestor

    2009-06-01

    Full Text Available El "tripeperro" (Philodendron longirrhizum es una planta hemiepífi ta de ampliadistribución en Los Andes de Colombia. En la región del Eje Cafetero colombiano seemplean las raíces aéreas de esta especie como fi bra para elaborar canastos y artesanías.Esta actividad tiene una larga tradición en la región y se concentra en el municipiode Filandia (departamento del Quindío. En los últimos años se ha presentado unadisminución en la oferta de raíces adecuadas para la actividad artesanal en todas lasáreas donde tradicionalmente se obtiene el "tripeperro". Se evaluó el efecto de laextracción sobre la estructura de tamaños, la densidad y el rendimiento de las raíces,comparando poblaciones en áreas con extracción del recurso con poblaciones enáreas sin extracción. Los resultados indican que, aunque la extracción parece noafectar la densidad poblacional, sí tiene efectos signifi cativos sobre la estructura detamaños y, en consecuencia, sobre el rendimiento de las raíces. La disponibilidad deeste recurso en las áreas con extracción es hasta cinco o seis veces menor que en delas áreas sin extracción.

  3. Estructura comunitaria de bivalvos y gasterópodos en raíces del mangle rojo Rhizophora mangle (Rhizophoraceae en isla Larga, bahía de Mochima, Venezuela

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    Vanessa Acosta Balbas

    2014-08-01

    Full Text Available Las raíces del mangle rojo forman un complejo ecosistema donde se reproducen, refugian y establecen de manera permanente una gran diversidad de organismos. En este estudio, se evaluó la diversidad de bivalvos y gasterópodos que habitan las raíces del mangle rojo Rhizophora mangle, en isla Larga, Bahía de Mochima, estado Sucre Venezuela. Se realizaron recolectas bimensuales desde enero 2007 hasta mayo 2008, en cuatro zonas de estudio denominadas: zona sur, norte, este y oeste. En cada zona se muestrearon cinco raíces de mangle, de donde se obtuvieron los especímenes. Se analizaron un total 180 raíces y se contabilizaron 35 especies de bivalvos y 25 de gasterópodos. Los bivalvos más abundantes fueron: Isognomon alatus, Isognomon bicolor, Ostrea equestris, Crassostrea rhizophorae y Brachidontes exustus, mientras que los gasterópodos más frecuentes: Littorina angulifera, Cymatium pileare y Diodora cayenensis. Los meses donde se observaron las mayores abundancias de especies y número de individuos fueron enero y julio 2007 y marzo 2008. El ecosistema de manglar en isla Larga, presentó un número de individuos y especies superior al reportado en otros trabajos realizados en Venezuela y otras regiones del Caribe.

  4. Don Quijote, Hamlet y el cogito. Sobre las raíces de la estética en la filosofía moderna

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    Serrano, Vicente

    2012-12-01

    Full Text Available The article compares the two main characters of Shakespeare and Cervantes with Cartesian cogito, to find out if they express aspects of modernity that cartesian cogito hides. In particular are analyzed from the point of view of the absence, whose expression is compared with the loss of the metaphysics of being and the pre-modern notion of nature. It explores the possibility that the aesthetic is rooted in modern philosophyEl artículo compara los dos grandes personajes de Shakespeare y Cervantes con el cogito cartesiano a fin de averiguar si expresan aspectos de lo moderno que este último oculta. En particular se analizan desde la perspectiva de la ausencia, cuya expresión se compara con la pérdida de la metafísica del ser y de la noción de naturaleza premodernas. Se indaga la posibilidad de que en esa ausencia hunda sus raíces la estética de la filosofía moderna.

  5. Cesárea prévia como fator de risco para o descolamento prematuro da placenta Previous cesarean section as a risk factor for abruptio placentae

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    Fábio Roberto Cabar

    2004-10-01

    Full Text Available OBJETIVO: investigar a relação entre o antecedente de cesárea e a ocorrência do descolamento prematuro da placenta (DPP. MÉTODOS: estudo retrospectivo em que foram avaliados os dados referentes a 6495 partos realizados no período entre abril de 2001 e janeiro de 2004. Foram adotados como critérios de inclusão: diagnóstico de DPP confirmado por exame da placenta após o parto, gestação única, peso do recém-nascido superior a 500 g e idade gestacional acima de 22 semanas e ausência de história de trauma abdominal na gestação atual. Para cada caso de DPP incluído no estudo foram selecionados cinco controles, obedecendo ao seguinte pareamento: paridade, idade gestacional (30 semanas, diagnóstico materno de síndrome hipertensiva na gestação índice, antecedente de cicatriz uterina prévia não relacionada à operação cesariana, diagnóstico de rotura prematura de membranas ou diagnóstico de polidrâmnio. A análise univariada das variáveis contínuas foi realizada utilizando-se o teste t de Student e as variáveis categóricas foram avaliadas por meio de teste exato de Fisher ou teste de chi2, com níveis descritivos (p menores que 0,05 considerados significantes. RESULTADOS: 34 casos de pacientes com diagnóstico de DPP preencheram os critérios de inclusão (incidência de 0,52%. Para o grupo controle foram selecionadas 170 pacientes que obedeceram aos critérios de pareamento propostos. No grupo de pacientes com DPP, 26,5% apresentavam antecedente de parto cesárea (9 casos, ao passo que, no grupo controle, esse antecedente foi observado em 21,2% das pacientes (36 casos. Não houve diferença estatisticamente significativa na incidência de cesárea prévia entre os dois grupos estudados (p=0,65, OR=1,34, IC 95%=0,53-3,34. CONCLUSÃO: o aspecto abordado neste estudo, isto é, a associação do DPP em pacientes com cicatriz uterina de cesárea, não pôde ser confirmado com a presente casuística.PURPOSE: to study the

  6. Prova de Trabalho de Parto Após uma Cesárea Anterior The Trial of Labor After one Cesarean Section

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    Iracema de Mattos Paranhos Calderon

    2002-01-01

    Full Text Available Objetivo: estudar a validade da prova de trabalho de parto (PTP em gestantes com uma cesárea anterior. Métodos: estudo retrospectivo, tipo coorte, incluindo 438 gestantes com uma cesárea anterior ao parto em estudo e seus 450 recém-nascidos (RN, divididas em dois grupos - com e sem PTP. O tamanho amostral mínimo foi de 121 gestantes/grupo. Considerou-se variável independente a PTP e as dependentes relacionaram-se à ocorrência de parto vaginal e à freqüência de complicações maternas e perinatais. Foram efetuadas análises uni e multivariada, respectivamente. A comparação entre as freqüências (% foi analisada pelo teste do qui-quadrado (chi² com significância de 5% e regressão logística com cálculo do odds ratio (OR e do intervalo de confiança a 95% (IC95%. Resultados: a PTP associou-se a 59,2% de partos vaginais. Foi menos indicada nas gestantes com mais de 40 anos (2,7% vs 6,5% e nas portadoras de doenças associadas e complicações da gravidez: síndromes hipertensivas (7,0% e hemorragias de 3º trimestre (0,3%. A PTP não se relacionou às complicações maternas e perinatais. As gestantes que tiveram o parto por cesárea, independente da PTP, apresentaram maior risco de complicações puerperais (OR = 3,53; IC95% = 1,57-7,93. A taxa de mortalidade perinatal foi dependente do peso do RN e das malformações fetais e não se relacionou à PTP. Ao contrário, as complicações respiratórias foram mais freqüentes nos RN de mães não testadas quanto à PTP (OR = 1,92; IC95% = 1,20-3,07. Conclusões: os resultados comprovaram que a PTP em gestantes com uma cesárea anterior é estratégia segura - favoreceu o parto vaginal em 59,2% dos casos e não interferiu com a morbimortalidade materna e perinatal. Portanto, é recurso que deve ser estimulado.Purpose: to study trial of labor (TOL for vaginal birth after one previous cesarean section. Methods: this is a retrospective cohort study that included 438 pregnant women with

  7. Improving Agricultural Water Use Efficiency: A Quantitative Study of Zhangye City Using the Static CGE Model with a CES Water−Land Resources Account

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    Yu Liu

    2017-02-01

    Full Text Available Water resources play a vital role in human life and agriculture irrigation, especially for agriculture-dominant developing countries and regions. Improving agricultural water use efficiency has consequently become a key strategic choice. This study, based on Zhangye City’s economic characteristics and data, applies a static Computable General Equilibrium (CGE model with a constant elasticity of substitution (CES composited water−land resources account to assess the impact of improving agricultural water use efficiency on economy, water conservation and land reallocation. Results reveal that: Zhangye City’s GDP increases by 0.10% owing to an increasing average technical level by improving agricultural water use efficiency; total water consumption decreases by 122 million m3, 69% of which comes from a reduction of surface water use; and land demand increases by 257.43 hectares mainly due to agricultural land demands. With respect to the sectors’ output, export-oriented sectors with higher water intensities in the agricultural sectors benefit most. In contrast, land-intensive sectors contract the most, as the rental price of land rises. Therefore, agricultural water conservation technology should be introduced considering more in surface water. Furthermore, higher demand for agricultural land would reduce land availability for other sectors, thus inhibiting urbanization pace on a small scale.

  8. CES_EHP_Figure_2

    Data.gov (United States)

    U.S. Environmental Protection Agency — The increasing number of chemicals for which SHEDS probabilistic exposure assessment has been performed over the years. This dataset is associated with the following...

  9. Antagonistic Interfa(e)ces

    DEFF Research Database (Denmark)

    Cox, Geoff; Jackson, Robert

    2011-01-01

    the logic of encapsulation. As a rule, encapsulation reduces system complexity between the user and the platform's influence mediated by the formal behaviour of code and the representative interface. In turn, this has led to the constraint of expression within the public realm by suppressing the political......If platform applications have become the primary mode of accessing online information and communication, it should come as no surprise that the political motivations for doing so emerge from an antagonism inherent in the Object Oriented paradigm of encapsulation. Following ‘Platform Studies......’ (Bogost and Montfort), the paper will assume that 'platforms' are the foundational hardware or software system environments where programs are executed. However, what constitutes the increasingly proprietary level of privatised service platforms are the forced removals of complexity implemented through...

  10. Public Interfa(e)ces

    DEFF Research Database (Denmark)

    Cox, Geoff

    2011-01-01

    In the work of Hannah Arendt, the political realm arises out of acting together, in the sharing of speech and action. There has been much recent interest in revisiting Arendt’s ideas, in relation to a reconceptualisation of publicness. In Virno’s work, for instance, this is emphasized because...... as in speech or writing but also something that performs actions? For Kelty, again referring to Arendt, the free software movement is an example of what he calls a “recursive pubic”, to draw attention to emergent and self-organizing public actions. Moreover, publicness is constituted not simply by speaking......, writing, and protesting, but also through modification of the domain or platform through which these practices are enacted. And ordure? The quirky intervention of Dominique Laporte, in History of Shit (first published in French in 1978) verifies that modern power is founded on the aesthetics of the public...

  11. Frecuencia de la cesárea en Andalucía. Relación con factores sociales, clínicos y de los servicios sanitarios (2007-2009

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    Soledad Márquez-Calderón

    2011-01-01

    Full Text Available Fundamento, La tendencia creciente y variabilidad geográfica en el uso de la cesárea sugiere la existencia de factores explicativos no clínicos. El objetivo del estudio es analizar eluso de las cesáreas en Andalucía, explorando el papel de variables sociales, clínicas y de los servicios sanitarios. Métodos, Estudio transversal de todos los nacimientos de Andalucía (2007-2009 utilizando como fuente de información el Movimiento Natural de la Población. La variable dependiente fue la frecuencia de cesáreas y las explicativas se clasificaron en tres grupos, con significado clínico, relacionadas con el funcionamiento de los servicios sanitarios, y con significado social. Se realizó una regresión logística multivariante. Resultados, El 24,8% de los 293.558 nacimientos fue porcesárea. En el análisis multivariante se observó que la variable clínica con la mayor odds ratio (OR fue la existencia de complicaciones (OR=19,36. En cuanto a las variables relacionadas con los servicios sanitarios hubo un 55% más cesáreas de lunes a viernes que en fines de semana y la provincia con mayor uso de cesárea fue Cádiz (OR de 1,21 frente a Almería con unarazón de partos en centros públicos frente a privados de 3,7. La frecuencia de cesáreas fue un 34% superior en las mujeres conestudios de tercer grado que en las que no tenían estudios. Conclusiones, La variable con mayor influencia en la práctica de cesárea fue la existencia de complicaciones. La tasa decesárea estuvo por encima de los estándares aceptados en todas las clases sociales, con mayor incidencia a mayor nivel educativo. Las diferencias interprovinciales reflejan distintos patrones de uso de la medicina privada.

  12. Estudo das indicações de partos cesáreas entre hospitais de atendimento ao Sistema Único de Saúde: baixo e alto riscos

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    Caroline Rosa Pellicciari

    2015-10-01

    Full Text Available A alta incidência de partos cesáreas  sem indicações precisas é motivo de preocupação mundial.  As cesáreas sem indicações médicas estão associadas a maiores riscos maternos e fetais. De acordo com a Organização Mundial da Saúde (OMS não há justificativa, para qualquer região do mundo possuir  taxas de partos cesáreas maiores do que 10-15%.  Este projeto investigou  os fatores indicativos para a  realização de partos cesáreas  entre hospitais da rede SUS em Sorocaba-SP: Hospital Santa Lucinda – HSL (baixo risco e Conjunto Hospitalar de Sorocaba – CHS (alto risco. Durante o período de 03/2014 a 03/2015 foi realizada análise retrospectiva de 300 prontuários das pacientes internadas nestes hospitais. Analisou-se parâmetros maternos sócio-epidemiológicos, reprodutivos, clínicos e  indicações dos partos cesáreas.  No CHS prevaleceu o tipo de parto cesárea (56,3%, enquanto no HSL a porcentagem do parto cesárea foi 32,4% (p<0,001.  Em relação ao tipo de parto anterior, o número de pacientes com cesárea anterior prevalece no HSL: 77% (n=83 em comparação com o CHS: 56,4% (n=62, (p=0,0009.   Em relação às indicações de cesárea, as mais prevalentes no HSL foram: sofrimento fetal agudo: 24% (n=36, falha na indução ao parto: 22% (n=33 e desproporção céfalo-pélvica: 18,7% (n=28. No CHS  as maiores proporções foram: sofrimento fetal agudo: 35,3% (n=53  e iteratividade: 25,3% (n=38 (p<0,0001.  A observação dos resultados demonstra a realização de partos cesáreas em porcentagens superiores àquelas preconizadas pela OMS. Sua redução poderá ser conseguida preparando-se e conscientizando-se melhor a mulher perante a futura parturição, com procedimentos precisos de indução ao parto, utilizando a aplicação de procedimentos analgésicos, e, ainda com a devida prática da extração baixa pelo fórcipe de alívio às parturientes.

  13. Los sustentos científico-filosóficos en las raíces del pensamiento pedagógico cubano. Consideraciones para un debate

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    Dr. C. Homero Calixto Fuentes-Gonzáles

    2015-10-01

    Full Text Available Si bien no se pretende agotar el estudio del pensamiento filosófico cubano, se revelan aspectos relevantes, que constituyen hitos significativos de donde emerge un pensamiento que fue capaz de aunar lo filosófico y lo pedagógico, como factor mediador entre la ciencia y la patria, donde se explayan el método electivo del Padre Caballero, como forma primaria y espontánea de escoger, de resumir y consolidar, desde un reconocimiento lógico a los conocimientos, ascendiendo de forma natural; la estabilidad de los conocimientos adquiridos con la experimentación de Félix Varela; la dialéctica espontánea con la introducción de la práctica en José de la Luz y Caballero, la aparición del humanismo ético universal de José Martí y la proyección gnoseológica, antimetafísica, si bien positivista, de Enrrique José Varona, hasta llegar a la consabida contraposición entre las corrientes del pensamiento filosófico de la década del veinte, que a partir de la segunda mitad del siglo XX se inserta, lo que ya desde Julio Antonio Mella se proyecta, el pensamiento Marxista y la Dialéctica Materialista, que con la visión política y educativa de Fidel transforma la Educación Cubana en su quehacer práctico e ideológico, con una mirada de futuro, que debemos integrar a las raíces de un pensamiento pedagógico cubano genuino en una auténtica continuidad histórica, lo cual es una urgencia y reto de nuestros días.

  14. PENGARUH KONSENTRASI ANTIMIKROORGANISME, MEDIA FERMENTASI, DAN WAKTU INKUBASI TERHADAP PERTUMBUHAN Absidia corymbifera (Cohn Sacc. & Trotter DARI JAMUR ENDOFIT Fusarium nivale (Fr. Ces.

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    Suciatmih Suciatmih

    2012-12-01

    Full Text Available Fusarium nivale (Fr. Ces., an endophytic fungi from Dendrobium crumenatum Sw. (pigeon orchidshowed an antimicroorganism activity against Absidia corymbifera (Cohn Sacc. & Trotter, causing of human zygomycosis. The aim of this study is to find out the effect of concentration of antimicroorganism agent, fermentation medium, and incubation time to control A. corymbifera by F. nivale; and to make curve of F. nivale growth and curve of its antimicrobial production. Five different concentrations of antimicroorganism agent (0, 75, 150, 225, and 300 ul, four different fermentation media (PotatoDextrose Yeast, Tauge Extract Broth , Kedelai Extract Broth , and Jagung Extract Broth, and eight different incubation times (0, 1, 2, 3, 4, 5, 6, and 7 days were chosen for this experiment. Parameters of the study were change of filtrate pH, dry weight of mycelial cell of F. nivale, and percentage inhibition of mycelial growth of A. corymbifera. The results indicated that antimicroorganism agent concentration of 150 ul applied and potato dextrose yeast medium were the most effective to inhibit A.corymbifera. The antimicroorganism agent was produced during growth of the fungi. The production of antimicroorganism agent coinced with the decrease in pH from 6.0 to 4.81; and the increase in pH from4,81 to 7.24-8.01. A optimum activity of antimicroorganism agent (31,23 during growth of fungi occurred on the 2th day of incubation. Keywords: A. corymbifera; aktivitas antimikroorganisme; F. nivale; persentase hambatan pertumbuhan miselium A. corymbifera

  15. Inorganic Species Behaviour in Thermochemical Processes for Energy Biomass Valorisation Comportement des espèces inorganiques dans les procédés thermochimiques de valorisation énergétique de la biomasse

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    Froment K.

    2013-09-01

    difficulties (corrosion, fouling, etc.: a detailed summary of the specific behaviour of the inorganic compounds in biomass thermal conversion facilities will be given, going from the description of inorganic species included in biomass up to the prevention and the solution, as far as possible. The following topics will therefore be developed: inventory of inorganic species in different biomasses; general review of the inorganic speciation during thermal conversion processes; technological barriers to overcome for economic and technological process improvements; specific aspects related to inorganic species behaviour investigated at CEA: inorganic species release and condensation; aerosol behaviour and deposits; hot particles filtration; slag formation and interactions with reactor wall. Les espèces inorganiques de la biomasse (bois, déchets agricoles, déchets ménagers voire boues d’épuration présentent un large spectre en compositions et quantités, dépendant de l’origine de la biomasse (nature, lieux et conditions de sa croissance, etc.. Les différents procédés de conversion (combustion, pyrolyse, gazéification, etc. et les différentes technologies associées (fours à grille, lits fixes ou fluidisés, réacteurs à flux entraînés, etc. utilisant l’énergie de la biomasse, fournissent des conditions opératoires très variées en atmosphère, température, pression, etc. Au cours de chacun de ces procédés thermiques de conversion, en fonction de la composition initiale de la biomasse, de l’atmosphère et la température du procédé (la pression est un paramètre de second ordre par rapport aux précédents, certaines espèces inorganiques réagissent pour former des composés liquides ou gazeux, seuls ou combinés à d’autres espèces : celles-ci peuvent être soit piégées à différents endroits dans le procédé, soit relâchées avec le gaz. Les interactions potentielles de ces espèces inorganiques avec les parois des réacteurs, les mat

  16. Experiencia de mujeres con cesárea en Uruguay: el derecho a estar acompañada por una persona de su elección y las dificultades en su cumplimiento

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    Carolina Farías

    2018-02-01

    Full Text Available El objetivo de este artículo es analizar el acompañamiento durante la cesárea, por parte de una persona de confianza de la mujer, consagrado por la Ley nº 17.386 de “acompañamiento en el parto”, aprobada en Uruguay en el año 2001. Los resultados forman parte de una investigación mayor sobre la vivencia y el significado de la cesárea para las mujeres que pasaron por esta experiencia. Para ello se optó por una metodología cualitativa de carácter exploratorio y descriptivo. La técnica utilizada fue la entrevista en profundidad, realizada a un total de 31 mujeres, cuyas cesáreas tuvieron lugar en su primera gestación, en Montevideo y área metropolitana (Uruguay. De los resultados obtenidos, se concluye que el acompañamiento en el proceso de trabajo de parto y nacimiento es vivido por las mujeres como un factor de protección emocional ante las ansiedades que genera la experiencia de una cirugía mayor como es la cesárea. Sin embargo, para las mujeres entrevistadas, el “acompañamiento” más que continuo se caracterizó por una serie de separaciones, tanto de sus acompañantes, como de sus hijos/as, lo cual provocó ansiedad, angustia, sentimientos de ambivalencia ante el recién nacido, dificultades en el establecimiento del vínculo materno-filial, sobre todo en el puerperio inmediato.

  17. Moluscos asociados a las raíces sumergidas del mangle rojo Rhizophora mangle, en el Golfo de Santa Fe, Estado Sucre, Venezuela

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    B. Márquez

    2002-12-01

    Full Text Available Se realizó un estudio mensual cualitativo y cuantitativo de la comunidad de moluscos asociados a las raíces sumergidas del mangle rojo, Rhizophora mangle, entre octubre de 1998 y septiembre de 1999, en seis estaciones del Golfo de Santa Fe (Estado Sucre, Venezuela. Se colectaron e identificaron un total de 4 704 individuos pertenecientes a 45 especies de moluscos (22 gasterópodos, 15 bivalvos y 8 polyplacóforos. Las especies más abundantes fueron: Crassostrea rhizophorae, Isognomon bicolor L alatus y Brachidontes exustus. Los valores más altos de diversidad y equitabilidad, y los menores valores de dominancia, se encontraron en las estaciones tres y cuatro, mientras que lo opuesto ocurrió en las estaciones uno y dos. El análisis de afinidad mostró que en las cinco primeras estaciones las variaciones espaciales en la composición de la comunidad son mayores que las variaciones temporales, mientras que en la estación seis priman las diferencias temporales. Se encontraron factores que podrían ser importantes para determinar la estructura de la comunidad, como vecindad a otros ecosistemas y/6 aspectos biológicos específicos de las especies como adaptaciones a condiciones fluctuantes, hábitos alimenticios y migración en busca de ambientes sombreados y protegidos.A qualitative and quantitative monthly study of the mollusks community associated to the submered roots of the red mangrove, Rhizophora mangle (L., between October of 1998 and September of 1999, in six stations of the Gulf of Santa Fe. (Suere State, Venezuela. Were collected 4 704 specimens, 45 species of mollusks were identified (22 gastropods, 15 bivalves and 8 chitons. The most abundant species were: Crassostrea rhizophorae, Isognomon bicolor, L alatus and Brachidontes exustus. The highest values in diversity and evenness, and the smallest dominant values, were in the stations three and four, while the opposed happened in the stations one and two. The analysis of likeness

  18. EVALUACIÓN DE UN SISTEMA in vitro PARA ESTUDIOS DE Spongospora subterranea f. sp. subterranea EN RAÍCES DE PAPA (Solanum tuberosum subsp. andigena L. Var. DIACOL CAPIRO

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    JULIANA SOLER-ARANGO

    2012-07-01

    Full Text Available La papa es uno de los principales cultivos de importancia a nivel mundial. Según la Cadena Agroalimentaria de la papa de Colombia, la sarna polvosa está dentro de los siete principales problemas fitosanitarios de este cultivo en las zonas productoras. La enfermedad es causada por el patógeno Spongospora subterranea, que disminuye la producción y calidad de los tubérculos. La naturaleza obligada del patógeno  imposibilita su aislamiento y el mantenimiento de cepas, dificultando su investigación. En este trabajo se  buscó estandarizar el cultivo de raíces de papa in vitro infectadas con el patógeno, para permitir su mantenimiento y proliferación y avanzar así en las investigaciones posteriores sobre biología del patógeno y su interacción con sus hospedantes. En un medio gelificado in vitro y en un ambiente controlado se asociaron las raíces de las plantas al microorganismo, mientras que la parte aérea desarrolló fotosíntesis. Se realizaron evaluaciones durante dos meses después de inoculadas las raíces con quistosoros desinfectados, período de tiempo que fue condicionado por la contaminación del sistema de cultivo. Sin embargo, en observaciones al microscopio, se lograron detectar las estructuras de S. subterranea

  19. Incontinência urinária no puerpério de parto vaginal e cesárea: revisão de literatura = Urinary incontinence in postpartum of vaginal delivery and cesarean: literature review

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    Borba, Alice Rios

    2014-01-01

    Full Text Available Objetivo: O estudo objetivou revisar a literatura quanto à presença de incontinência urinária (IU no puerpério de parto normal e cesárea. Materiais e Métodos: Foi realizada uma pesquisa nos bancos de dados PubMed/MedLine, COCHRANE e EMBASE. Foram selecionados os seguintes tipos de estudo: prospectivo multicêntrico, caso-controle, prospectivo, coorte, multicêntrico prospectivo observacional, randomizado controlado, prospectivo observacional, coorte controlado, transversal, base populacional, publicados no período de 2002 a 2012, nos idiomas inglês e português, em que as palavras-chave estivessem no título ou resumo. As palavras-chave utilizadas foram: “parto vaginal”, “cesárea” e “incontinência urinária”. Resultados: Os 14 estudos analisados, avaliaram a presença de IU no puerpério de parto vaginal e cesárea. Observamos que a cesárea para ter seu papel protetor no aparecimento da IU no puerpério deve ser realizada de maneira eletiva. Os distúrbios do assoalho pélvico estão fortemente ligados com idade materna, fumo, obesidade, parto de fórceps, multiparidade, episiotomia, duração da segunda fase do trabalho de parto, gravidez e constipação crônica. Conclusão: Conclui-se que a segunda fase prolongada do trabalho de parto tem papel significativo na presença da IU no puerpério em ambos modos de parto, e que a cesárea teria o seu valor protetor no desenvolvimento da IU no puerpério apenas se fosse realizada de maneira eletiva. Dos 14 artigos, apenas um estudo foi realizado na população brasileira, mostrando a importância de serem realizados mais estudos sobre IU no puerpério no Brasil

  20. Evaluación de un sistema de biorreacción para la producción de escopolamina por cultivo de raíces de Brugmansia candida / Evaluation of a bioreaction system to produce scopolamine from Brugmansia candida root culture

    OpenAIRE

    Otálvaro Álvarez, Ángela María

    2009-01-01

    Esta investigación permitió establecer cultivos de raíces normales de Brugmansia candida a nivel de biorreactor con el fin de producir escopolamina. En primera instancia se caracterizaron cultivos de raíces normales en Erlenmeyer estableciendo variables como la velocidad de crecimiento de las raíces y su producción de escopolamina (7,8 mg/g de raíz seca) además de relaciones que permitieran caracterizar de manera indirecta el crecimiento celular. Los ensayos a nivel de biorreactor se desarrol...

  1. Abundancia y riqueza de moluscos y crustáceos asociados a las raíces sumergidas del mangle rojo (Rhizophora mangle en la laguna de Bocaripo, Sucre, Venezuela

    Directory of Open Access Journals (Sweden)

    Jennellis Cedeño

    2010-10-01

    Full Text Available Las raíces de mangle son un importante hábitat para muchas especies. Se estudió la abundancia y riqueza de moluscos y crustáceos asociadas a las raíces sumergidas de Rhizophora mangle. Las muestras fueron recolectadas entre febrero 2005 y enero 2006, en la laguna de Bocaripo, costa norte del estado Sucre, Venezuela. Se establecieron cinco estaciones en la laguna; al azar en cada estación se escogieron dos raíces de mangle, fueron introducidas en bolsas plásticas; los organismos fueron obtenidos de la raíz raspando la superficie con un cuchillo, luego fueron separados y fijados en formalina al 10% para su posterior identificación. Se recolectaron 1 092 especimenes de moluscos, distribuidos en dos clases: Bivalvia y Gastropoda. La clase Bivalvia fue la más abundante con 943 individuos. La familia más representativa fue Mytilidae con 6 especies, siendo Musculus lateralis la especie dominante. Los crustáceos estuvieron representados por 372 organismos, pertenecientes a la clase Malacostraca, donde Panopeus herbstii (169 ind. fue la especie más abundante. Las familias Panopeidae, Porcellanidae y Majidae presentaron el mayor número de especies. La máxima abundancia se encontró en febrero (224 ind. con una riqueza de 25 especies y la mínima en noviembre (45 ind. con 12. Las estaciones 1 y 5 presentaron la mayor abundancia y riqueza de organismos, lo cual pudiera estar relacionado con condiciones ambientales favorables, como la mayor disponibilidad de microhábitats y oferta alimenticia; por el contrario la estación 4, presentó un ambiente más inhóspito, debido a los altos valores en la salinidad y temperatura, lo cual contribuye con la menor abundancia y riqueza de las especies presentes.

  2. Variabilidad y confiabilidad de los tiempos registrados de procesos operatorios de cesáreas realizadas en una clínica particular de Lima, Perú, 2011

    Directory of Open Access Journals (Sweden)

    Manuel André Virú-Loza

    2013-01-01

    Full Text Available Introducción: La evaluación de la eficiencia es una herramienta útil para una correcta toma de decisiones en los centros de salud. Esta incluye conocer la variabilidad y confiabilidad de los tiempos de procedimientos médicos y quirúrgicos registrados. Objetivos: Determinar la variabilidad y confiabilidad de los tiempos registrados de procesos operatorios de cesáreas. Diseño: Estudio transversal. Institución: Clínica Centenario Peruano Japonesa. Participantes: Registros de pacientes con cesáreas. Intervenciones: A partir del registro operatorio y del registro de las historias clínicas se obtuvo datos médicos y de tiempos operatorios, durante el año 2011. Principales medidas de resultados: Medidas de dispersión de todos los indicadores y coeficientes de correlación intraclases (CCIs entre los registros evaluados. Resultados: El tiempo de traslado del paciente a sala de operaciones presentó la mayor variabilidad y los CCIs entre los registros utilizados con respecto al tiempo de inicio y finalización de las cesáreas fueron 0,902 y 0,901, respectivamente. Conclusiones: En la clínica estudiada, el tiempo de traslado del paciente a sala de operaciones fue el más variable, existiendo un buen grado de confiabilidad entre los registros estudiados. Los análisis de eficiencia y productividad para mejorar procesos quirúrgicos en nuestro medio deben ser publicados para que sirvan de utilidad en otros centros de salud.

  3. Method of obtaining concentrated preparations of Cl{sup 36} and Br{sup 82} by recoil nuclei under exposure to high-density neutron fields; Preparation de composes du chlore-36 et du brome-82 de haute activite specifique, par exposition de noyaux de recul a des champs neutroniques intenses; Poluchenie kontsentrirovannykh preparatov Cl{sup 36} i Br{sup 82} metodom yader otdachi pri obluchenii v nejtronnykh polyakh vysokoj plotnosti; Obtencion de compuestos de cloro-36 y de bromo-82 de alta actividad especifica por retroceso de nucleos en campos neutronicos intensos

    Energy Technology Data Exchange (ETDEWEB)

    Kurchatova, L N; Kurchatov, B V

    1962-01-15

    number of processes: formation of radioactive chlorine atoms, radiolytic detachment of the halide, diffusion of the products in the carbon lattice, their absorption on the surface, and their recombination at various centres. Many factors, such as the ultramicroscopio structure; the nature of the new compounds, related in type to the surface compounds; the presence on the carbon surface of centres with a continuous sorption energy spectrum; the probable formation, through carbon irradiation, of various stationary recombination centres, and others, constitute an extraordinary variety of conditions for the formation and interaction of irradiation products with the carbon skeleton and surface. Therefore these systems open the way to a wide range of experiments to select the ideal conditions for enrichment. (author) [French] D'une maniere generale, la methode classique de Szilard-Chalmers pour l'obtention de preparations radioactives concentrees est consideree comme peu efficace lorsqu'on utilise d'importants flux integraux de neutrons, en raison de la 'desintegration considerable du compose sous l'effet des rayonnements. Les auteurs ont trouve des composes de brome et de chlore avec du carbone, qui permettent d'enrichir considerablement le chlore et le brome en radioisotopes par exposition de noyaux de recul a. des flux neutroniques de l'ordre de 10{sup 13} n/cm{sup 2} s. Ces composes repondent a la formule C{sub n}X, X etant du Cl ou du Br et n = 10 a 20 pour les composes du chlore, et 25 a 70 pour les composes du brome. Ces composes sont suffisamment stables aux points de vue thermique et chimique. Le compose C30 Br supporte un echauffement allant jusqu'a 300{sup o}C dans une atmosphere d'argon sans que le brome s'en separe; il se decompose completement a une temperature de 600{sup o}C. Il resiste pratiquement a l'action des reducteurs en solution aqueuse. Les composes de chlore et de carbone sont a peu pres aussi stables que ceux de brome et de carbone. A la temperature

  4. Clonación del cDNA del gen de la insulina humana en raíces aéreas de Brassica oleracea var italica (brócoli)

    OpenAIRE

    Berenice García Reyes; María del Carmen Montes Horcasitas; Emma Gloria Ramos Ramírez; Armando Ariza Castolo; Josefina Pérez Vargas; Octavio Gómez Guzmán; Graciano Calva Calva

    2010-01-01

    La insulina humana es una proteína de actividad hormonal que regula los niveles de glucosa en sangre. Cuando la insulina falla se desarrolla el padecimiento conocido como diabetes. La insulina se ha expresado en bacterias, levaduras, hongos, células animales y sistemas vegetales por biotecnología vegetal. En este trabajo presentamos los resultados del uso de raíces transformadas de Brassica oleracea var italica (Brocoli) para producir insulina humana. Materiales y Métodos: El cDNA del corresp...

  5. Cultivo de raíces aéreas de brócoli transformadas con la proteína L1 del virus del Papiloma humano

    OpenAIRE

    Juan Manuel Jiménez Antaño; María del Carmen Montes Horcasitas; Emma Gloria Ramos Ramírez; Armando Ariza Castolo; Josefina Pérez Vargas; Octavio Gómez Guzmán; Graciano Calva Calva

    2010-01-01

    El cáncer cervicouterino está asociado a la infección del virus del papiloma humano (HPV). La proteína L1es el componente principal de la cápside del HPV y forma partículas semejantes a virus (VLP) altamente antigénicas. Existen vacunas a base de VLP pero los altos costos han motivado la búsqueda de procesos de producción alternativa. Los cultivos de raíces aéreas, biotecnología basada en plantas, ofrece una alternativa viable porque pueden propagarse en biorreactores o regenerarse a plantas ...

  6. Producción de ácido indol-3-acético por Pseudomonas veronii R4 y formación de raíces en hojas de vid “Thompson seedless” in vitro

    OpenAIRE

    Maria Peñafiel Jaramillo; Alexandra Elizabeth Barrera Álvarez; Emma Danielly Torres Navarrete; Hayron Fabricio Canchignia Martínez; Humberto Prieto-Encalada; Jaime Morante Carriel

    2016-01-01

    Rizobacterias con actividad antagonista son empleadas a problemas patológicos y promueven el desarrollo de tejido radicular de especies vegetales El objetivo del estudio fue evaluar la capacidad en síntesis de ácido indol-3-acetico (AIA) y la formación de raíces en hojas de vid “Thompson Seedless”, por el empleo de Pseudomonas veronii R4 in vitro. La bacteria, fue incubada en medio mínimo M9 y se verificó la producción de AIA a 24, 48 y 72 h de muestreo, los sobrenadantes fueron analizandos p...

  7. Prototipo de vivienda de adobe con energías renovables: caso de estudio localidad de Raíces, Área Natural Protegida del Parque Nacional del Nevado de Toluca, Estado de México

    Directory of Open Access Journals (Sweden)

    Mercedes Ramírez Rodríguez

    2013-01-01

    Full Text Available Como una alternativa a la construcción de la vivienda, este artículo introduce una nueva tecnología para edificar un prototipo de casa de adobe con energías renovables. Se muestrauna metodología para su diseño que se establece a partir de las características de las viviendas de la localidad de Raíces, ubicada en el municipio de Zinacantepec, dentro del territorio del Parque Nacional del Nevado de Toluca, espacio natural protegido por Decreto en 1936.

  8. Prototipo de vivienda de adobe con energías renovables: caso de estudio localidad de Raíces, Área Natural Protegida del Parque Nacional del Nevado de Toluca, Estado de México

    OpenAIRE

    Mercedes Ramírez Rodríguez

    2013-01-01

    Como una alternativa a la construcción de la vivienda, este artículo introduce una nueva tecnología para edificar un prototipo de casa de adobe con energías renovables. Se muestrauna metodología para su diseño que se establece a partir de las características de las viviendas de la localidad de Raíces, ubicada en el municipio de Zinacantepec, dentro del territorio del Parque Nacional del Nevado de Toluca, espacio natural protegido por Decreto en 1936.

  9. Descomposición y liberación de nutrimentos desde las raíces finas de los sistemas agroforestales de cacao con sombras de poró y laurel, en Turrialba, Costa Rica Descomposición y liberación de nutrimentos desde las raíces finas de los sistemas agroforestales de cacao con sombras de poró y laurel, en Turrialba, Costa Rica

    Directory of Open Access Journals (Sweden)

    Muñoz Arboleda Fernando

    2006-06-01

    Full Text Available

    Se usó el método de bolsas de descomposición para estudiar la pérdida de biomasa y liberación de N, P, K, Ca y Mg desde las raíces finas (<2 mm en los sistemas agroforestales de cacao con sombras de poró y laurel. Se muestrearon bolsas a las 1, 2, 4, 6, 12, 18 y 25 semanas en las épocas seca y lluviosa. Las tasas de descomposición y liberación de nutrimentos fueron bien descritas por un modelo exponencial doble. Se observó alta relación entre las tasas de pérdida de biomasa y liberación de N de las tres especies. Las tasas de liberación de nutrimentos fueron K > Mg > P > N > Ca. Después de una semana de incubación cerca del 90% del K fue liberado mientras que el Ca tendió a la acumulación. Las raíces de poró fueron las de más rápida descomposición y liberación de nutrimentos, excepto de K. El poró sería la especie de sombra adecuada para sistemas de producción que requieran rápida recirculación de nutrimentos. El laurel exhibió tasas lentas de descomposición y liberación de nutrimentos.

    Palabras claves: Agroforestería, Theobroma cacao, Erythrina poeppigiana, Cordia alliodora, recirculación de nutrimentos, descomposición de raíces finas.

  10. Mental health (GHQ12; CES-D and attitudes towards the value of work among inmates of a semi-open prison and the long-term unemployed in Luxembourg

    Directory of Open Access Journals (Sweden)

    Le Bihan Etienne

    2008-06-01

    Full Text Available Abstract Aim To analyse the relationships between mental health and employment commitment among prisoners and the long-term unemployed (LTU trying to return to work. Method Fifty-two of 62 male inmates of a semi-open prison (Givenich Penitentiary Centre, the only such unit in Luxembourg, and 69 LTU registered at the Luxembourg Employment Administration completed a questionnaire exploring: 1 mental health (measured by means of scales GHQ12 and CES-D; 2 employment commitment; 3 availability of a support network, self-esteem, empowerment; and 4 socio-demographic characteristics. Results Compared with LTU, inmates were younger, more had work experience (54.9% vs 26.1%, and more were educated to only a low level (71.1% vs 58.0%. The link between employment commitment and mental health in the LTU was the opposite of that seen among the prisoners: the more significant the perceived importance of employment, the worse the mental health (GHQ12 p = 0.003; CES-D p Conclusion The two groups clearly need professional support. Future research should further investigate the link between different forms of professional help and mental health. Randomized controlled trials could be carried out in both groups, with interventions to improve work commitment for prisoners and to help with getting a job for LTU. For those LTU who value employment but cannot find it, the best help may be psychological support.

  11. Présence de trois espèces de grégarines (Apicomplexa : Eugregarinorida chez l’Annélide Polychete Marphysa sanguinea (Montagu, 1815 dans le lac de Tunis

    Directory of Open Access Journals (Sweden)

    Elbarhoumi M.

    2010-03-01

    Full Text Available Trois espèces de grégarines ont été trouvées dans des spécimens de l’annélide polychète Marphysa sanguinea récoltés dans le lac de Tunis : Bhatiella marphysae Setna, 1931, parasite de Marphysa sanguinea (Inde, Europe; Ferraria cornucephala iwamusi H. Hoshide, 1956, parasite de Marphysa iwamusi (Japon ; et Viviera sp. qui présente des similitudes avec Viviera marphysae Schrével, 1963, aussi décrite chez Marphysa sanguinea (France. Ces grégarines sont rapportées pour la première fois chez ce dernier hôte en Tunisie. Bhatiella marphysae et Viviera sp. appartiennent à la famille des Lecudinidae (Aseptatorina. La présence d’un septum proto-deutoméritique est confirmée chez Ferraria cornucephala qui doit être maintenue dans les Polyrhabdinae.

  12. Moluscos; anélidos y crustáceos asociados a las raíces de Rhizophora mangle linnaeus, en la región de Santa Marta, caribe colombiano Moluscos; anélidos y crustáceos asociados a las raíces de Rhizophora mangle Linnaeus, en la región de Santa Marta, caribe colombiano

    Directory of Open Access Journals (Sweden)

    Reyes Rosalba

    1992-09-01

    Full Text Available A qualitative and quantitative study of the community of macro invertebrates associated to the submerged stilt roots of the red mangrove, Rhizophora mangle Linnaeus, 1753, was carried out trimonthly between December 1988 and September 1989, in three stations at the Cienaga Grande de Santa Marta (CGSM and three at the Parque Nacional Natural Tayrona (PNNT, Bahia de Chengue, Bahia de Nenguange, Colombian Caribbean. 181 species were determined: 99 crustaceans, 50 molluscs and 32 annellids. Most of the 26.729 individuals counted were crustaceans (12.213 moluscs (11.635 and annellids (2.881. The lowest diversity and evenness values, and the highest dominance values were found at the CGSM, while the opposite occurred at the PNNT. Moreover, cluster analysis showed that at the CGSM temporal variations in community composition were greater than spatial ones, while at the PNNT spatial differences were stronger. Other factors that could be importantin determinig community structure were detected, such as vecinity to other ecosystems and/or species- specific biological aspects as adaptations to fluctuating conditions, reproductive acti vities, feeding habits and migration to protected and shaded habitats. Se realizó un estudio trimestral cualitativo y cuantitativo de la comunidad de moluscos, anélidos y crustáceos asociados a las raíces sumergidas del mangle rojo, Rhizophora mangle Linnaeus, entre diciembre de 1988 y septiembre de 1989, en tres estaciones en la Ciénaga Grande de Santa Marta (CGSM y tres en el Parque Nacional Natural Tayrona (PNNT, Bahía de Chengue y Bahía de Nenguange, Caribe colombiano. Se determinaron 181 especies: 99 crustáceos, 50 moluscos y 32 anélidos. En total se contaron 26.729 individuos: 12.213 crustáceos, 11.635 moluscos y 2.881 anélidos. Los valores más bajos de diversidad y equitatividad, y los mayores valores de dominancia, se encontraron en la CGSM, mientras que lo opuesto ocurrió en el PNNT. El análisis de

  13. Evaluation des conditions de germination des noyaux de Grewia ...

    African Journals Online (AJOL)

    personnel

    31 janv. 2014 ... 1Laboratoire de Physiologie et Production Végétales, Université Marien NGOUABI,. Faculté des Sciences et Techniques, BP.69. Brazzaville, Republique du Congo. 2Ecole Nationale Supérieure d'Agronomie et Forestérie, Université Marien NGOUABI,. BP. 69. Brazzaville, Republique du Congo.

  14. Evaluation des conditions de germination des noyaux de Grewia ...

    African Journals Online (AJOL)

    personnel

    31 janv. 2014 ... graines de G.coriacea afin de parvenir à un meilleur taux de germination naturellement médiocre. ... fourchettes) et comme matériau de ...... contre, les chocs thermiques par l'eau .... stockage et de la durée de chauffage.

  15. Production, obtention et valorisation des beurres exotiques

    OpenAIRE

    Pages Xavier

    2009-01-01

    By definition, “butters” are anhydrous and solid fats at room temperature. A lot of different crude fats and butters are available in Africa and other tropical countries, and their characteristics make often them interesting to valorise. This presentation will focus on a personal experience dealing with production and development of African butters. The production of butters and particularly the shea fat, is done by one of the two basic methods, roughly described as “traditional or modern”. T...

  16. Production, obtention et valorisation des beurres exotiques

    Directory of Open Access Journals (Sweden)

    Pages Xavier

    2009-07-01

    Full Text Available By definition, “butters” are anhydrous and solid fats at room temperature. A lot of different crude fats and butters are available in Africa and other tropical countries, and their characteristics make often them interesting to valorise. This presentation will focus on a personal experience dealing with production and development of African butters. The production of butters and particularly the shea fat, is done by one of the two basic methods, roughly described as “traditional or modern”. The rural (traditional vegetable oil extraction processes, which predominate the extraction technologies in many of the shea kernel producing areas, involve water extraction. This method often employs simple small sized and household equipments; it is based on aqueous extraction techniques to produce oil. The work is very hard but provides jobs, money and “consideration” to the women who are traditionally in charge of this work. Such a traditional method yields not more than 35% of the kernel oil contents and the product quality is often poor. It is obvious that a major contributing factor to the low yield is the treatment inability to adequately break the kernel cellular structures, a necessity to obtain an efficient oil/fat extraction. The “modern” methods involve the use of mechanical presses and organic solvents; although the methods are quite high-yielding (with extraction rates around 80%, they are reportedly difficult to perform because of the high latex content in the kernels: in fact the latex agglutinates and clogs the equipment or inhibits an efficient penetration of the extraction solvent. As we all know olein rich vegetable oils are globally abundant but commercial sources of vegetable fats, or “stearin”, are less common. Stearin is used in confectionery for chocolates, cakes, etc. and for margarine industries. The most developed and well-known source of stearin is cocoa butter; the development of this production is historical and is based on the “chocolate business” involving a lot of organisms and industries mainly located in “developed” countries. Beside this, other butters like Shea butter, Illipe, Kokum, Sal and mangoare available sources for substitutes in the production of cocoa butter improvers (CBI, equivalent (CBE or substitutes (CBS. Other markets for Shea butter exist in the personal care industry; the main reason for this growing interest has been the recognition by the cosmetic industry and consumers of the Sheat butter therapeutic benefits (ultra violet light protection, antiinflammatory, moisturizing, regenerative, anti-eczema and anti-wrinkle properties due to the presence of a significant fraction of unsaponifiable matters (3-15% composed of many bioactive chemicals, e.g. triterpene alcohols, phenols, sterols and the poly-isoprenic hydrocarbons like karitenes. In this field of valorisation (cosmetics, the unsaponifiable content is a key factor. In 1992 on the demand of DESLOG company, ITERG worked and patented an interesting method of increasing the unsaponifiable content of Shea butter using cryogenic enrichment by fractionation at about – 30 °C. The final product called CRYOKARITENE (registered trade mark can be enriched up to more than 50% of unsaponifiable and shows excellent dermo-cosmetic properties.

  17. Estratégias dirigidas aos profissionais para a redução das cesáreas desnecessárias no Brasil Strategies directed to professionals for reducing unnecessary cesarean sections in Brazil

    Directory of Open Access Journals (Sweden)

    Samira El Maerrawi T. Haddad

    2011-05-01

    Full Text Available O Brasil está entre os países com as mais elevadas taxas de cesárea, sobretudo na saúde suplementar. No entanto, tanto no setor público, como no privado, algumas características são semelhantes para os anseios e expectativas das gestantes em relação ao parto. Existe preferência para o parto vaginal entre as mulheres de todos os níveis social, econômico ou cultural, o que desloca o foco da influência negativa da mulher para os outros sujeitos envolvidos na assistência ao parto. Nenhum fator isoladamente é capaz de justificar a complexidade da decisão pelo parto por cesárea, porém o médico e o tipo de hospital são os maiores fatores associados. Os diversos efeitos prejudiciais da realização não criteriosa de parto cesárea são cientificamente comprovados. É fundamental a conscientização de médicos e demais profissionais sobre as consequências reais dessa decisão, os desvios éticos quando condutas são tomadas sem que o foco seja exclusivamente a saúde do paciente e a necessidade de capacitação e atualização constantes para o manejo das diversas situações possíveis para o nascimento.Brazil is among the countries with the highest cesarean section rates, especially in the supplementary health sector. However, some characteristics are similar in both the public and private sectors in terms of the wishes and expectations of pregnant women regarding their delivery. There is a preference for vaginal delivery among women of all social, economic, and cultural levels, a fact that shifts the focus of the negative influence of this variable from women to other subjects involved in delivery care. No isolated factor is able to justify the complexity of making a decision for cesarean section, but the physician and the type of hospital are the main associated factors. The several harmful effects of a non-judicious performance of cesarean section are scientifically recognized. It is important to raise the awareness of doctors

  18. Variación espacio-temporal de la comunidad de macroinvertebrados epibiontes en las raíces del mangle rojo Rhizophora mangle (Rhizophoraceae en la laguna costera de La Mancha, Veracruz, México

    Directory of Open Access Journals (Sweden)

    Marcela Ruiz

    2014-12-01

    Full Text Available La laguna de La Mancha está conectada al Golfo de México a través de una boca estuarina efímera, una barra arenosa, la cual se abre durante la época de lluvias y se cierra durante el otoño y la temporada de vientos invernales. Cuando la laguna se llena con la entrada de agua proveniente de un arroyo permanente, ubicado en la parte sur, el nivel del agua se incrementa y la barra arenosa se abre, descargando grandes volúmenes de agua hacia el océano y dejando expuesta a la desecación la zona intermareal previamente inundada. En este estudio, se describen las variaciones espacio-temporales de la estructura y composición de la comunidad de epibiontes que vive en la superficie de las raíces del mangle rojo,y su relación con la dinámica hidrológica de la boca estuarina. Se recolectaron cuatro raíces trimestralmente, durante un año, en diez estaciones de muestreo. También se midió la temperatura del agua, salinidad, oxígeno disuelto, profundidad y transparencia en cada muestreo. Se determinó la abundancia, la biomasa y la riqueza específica, a lo largo de las raíces en segmentos verticales de 10cm llamados horizontes. Se registraron un total de 59 632 especímenes y una biomasa total de 172g/cm2, y un máximo de once horizontes presentaron al menos una especie de epibionte. Se identificaron dos especies de poliquetos, 12 de moluscos y 14 de crustáceos, siendo Mytilopsis leucophaeata la más abundante, Ficopomatus miamiensis la más común y Crassostrea rhizophorae la de mayor contribución a la biomasa. Se evaluó la eficiencia del muestreo mediante curvas de acumulación de especies, resultando que la eficiencia fue, en general, >90% de la riqueza estimada por modelos asintóticos. La hidrodinámica de la boca estuarina tuvo gran influencia en las condiciones ambientales de la laguna y en las variaciones espacio-temporales de la comunidad de epibiontes: (a cuando la boca estuarina está cerrada son más claros los gradientes

  19. Desarrollo y validación de un método de cromatografía líquida para la determinación de biflorina obtenida de las raíces de Capraria biflora

    OpenAIRE

    Lyra Jr., Divaldo; Lira, Ana A. M.; Aquino, Thiago M.; Soares, Luiz Alberto Lira; Santana, Davi P.

    2007-01-01

    Se desarrolló y validó un método de Cromatografía Líquida para la cuantificación de biflorina obtenida de las raíces de Capraria biflora. El análisis fue realizado utilizando una columna C18 en condiciones isocráticas utilizando metanol-agua como solvente, con detección UV a 510 nm. Se obtuvo un coeficiente de determinación alto para biflorina (0,9993). El método presentó buena repetibilidad (R.S.D. = 1,68 %), reproducibilidad (R.S.D. = 2,13 %) y exactitud para el pico de biflorina (99,13 %, ...

  20. Gonzalo Portocarrero, Profetas del odio. Raíces culturales y líderes de Sendero Luminoso, Lima, Fondo Editorial de la Pontificia Universidad Católica del Perú, 2012, 258 p.

    OpenAIRE

    Iglesias, Daniel

    2012-01-01

    Los análisis del surgimiento y desarrollo de Sendero Luminoso (SL) han tenido siempre que afrontar duras críticas fuera del mundo académico peruano. Estas opiniones negativas son una de las tantas expresiones de las dificultades que existen en el Perú para reflexionar sobre los años de violencia y terrorismo que sacudieron este país entre 1980 y el año 2000. Las polémicas y escándalos desatados por la publicación del libro Profetas del odio. Raíces culturales y líderes de Sendero Luminoso del...

  1. Arbuscular mycorrhizal infection in two morphological root types of Araucaria araucana (Molina K. Koch Infección por micorrizas arbusculares en dos tipos de raíces de Araucaria araucana (Molina K. Koch

    Directory of Open Access Journals (Sweden)

    P. Diehl

    2010-06-01

    Full Text Available Araucaria araucana (Molina K. Koch is a conifer distributed in the Andean-Patagonian forests in the south of Argentina and Chile. The main objective of this work was to relate the different root classes appearing in A. araucana to mycorrhizal behavior. Samples were collected in three different sites in the Lanín National Park (NW Patagonia, Argentina. Two different root classes were present in A. araucana: longitudinal fine roots (LFR and globular short roots (GSR. Both had extensive mycorrhizal arbuscular symbiosis (AM and presented abundant hyphae and coils in root cells, a characteristic of the anatomical Paris-type. Dark septate fungal endophytes were also observed. Values of total AM colonization were high, with similar partial AM% values for each root class. Seasonal differences were found for total and partial colonization, with higher values in spring compared to autumn. Regarding the percentage of fungal structures between root classes, values were similar for vesicles and arbuscules, but higher coil percentages were observed in GSR compared to LFR. The percentages of vesicles increased in autumn, whereas the arbuscule percentages increased in spring, coinciding with the plant growth peak. Results show that both root classes of A. araucana in Andean-Patagonian forests are associated with AM fungi, which may have ecological relevance in terms of the importance of this symbiosis, in response to soil nutrient-deficiencies, especially high P-retention.La conífera Araucaria araucana (Molina K. Koch se encuentra distribuida en los bosques Andino-Patagónicos de Argentina y Chile. En este trabajo se relacionaron las diferentes clases morfológicas de raíces presentes en la especie con el comportamiento micorrícico. Las muestras fueron tomadas en tres sitios del Parque Nacional Lanín (NO de Patagonia, Argentina. Se observaron dos clases diferentes de raíces: raíces finas longitudinales (RFL y raíces cortas globulares (RCG. Ambas clases

  2. L'introduction d'espèces allochtones de grenouilles vertes en France, deux problèmes différents : celui de R. Catesbeiana et celui des taxons non présents du complexe Esculenta

    Directory of Open Access Journals (Sweden)

    NEVEU A.

    1997-01-01

    Full Text Available Depuis quelques années, la grenouille taureau (Rana catesbeiana est signalée en France dans une zone limitée de gravières près de Bordeaux. Elle est aussi présente depuis peu aux Pays-Bas et, dans les deux cas, la reproduction est effective. Cette espèce existe déjà en Europe depuis les années 30, à la suite d'introductions volontaires en Italie, sans pour cela avoir été signalée dans la partie ouest. La grenouille taureau est la plus grande des espèces nord-américaines et est considérée comme un prédateur éclectique. De ce fait, elle peut présenter un danger pour d'autres animaux, en particulier les grenouilles autochtones. Mais aucune donnée ne permet d'estimer cet éventuel impact en France et les données de la littérature ont souvent surestimé ce dernier. Par précaution, des mesures pourraient être prises pour réduire les populations actuelles présentes dans une aire pour le moment limitée. Les importations de grenouilles vivantes pour la consommation humaine, surtout à partir des pays du sud de l'Europe, sont l'occasion d'introductions de nouveaux taxons. Mais ces grenouilles font partie du même complexe et sont proches sur le plan morphologique, biologique et écologique. Les risques potentiels pour les populations locales sont les introductions de gènes, mais en ce qui concerne un éventuel avantage compétitif aucune donnée ne permet de conclure.

  3. Neutron penetrabilities using an optical model potential (1963); Penetrabilites des neutrons selon le modele du potentiel optique (1963)

    Energy Technology Data Exchange (ETDEWEB)

    Mani, G S; Melkanoff, M A; Iori, I [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1963-07-01

    The neutron penetrabilities and reaction cross-sections are presented in these tables for the case of an optical model potential for the nucleus, for nuclei up to mass 230. (authors) [French] Les penetrabilites et les sections efficaces de reaction pour les neutrons sont donnees dans ces tables en utilisant le modele du potentiel optique, pour les noyaux cibles jusqu'a la masse 230. (auteurs)

  4. Neutron penetrabilities using an optical model potential (1963); Penetrabilites des neutrons selon le modele du potentiel optique (1963)

    Energy Technology Data Exchange (ETDEWEB)

    Mani, G.S.; Melkanoff, M.A.; Iori, I. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1963-07-01

    The neutron penetrabilities and reaction cross-sections are presented in these tables for the case of an optical model potential for the nucleus, for nuclei up to mass 230. (authors) [French] Les penetrabilites et les sections efficaces de reaction pour les neutrons sont donnees dans ces tables en utilisant le modele du potentiel optique, pour les noyaux cibles jusqu'a la masse 230. (auteurs)

  5. Efficacité des méthodes de lutte contre le développement de cinq espèces de plantes invasives amphibies : Crassula helmsii , Hydrocotyle ranunculoides , Ludwigia grandiflora , Ludwigia peploides et Myriophyllum aquaticum (synthèse bibliographique)

    OpenAIRE

    Delbart, Emmanuel; Mahy, Grégory; Monty, Arnaud

    2013-01-01

    Parmi les espèces invasives connaissant une expansion rapide en Europe, les plantes dites « amphibies » sont particulièrement problématiques. Elles sont capables de former des populations très denses à la surface des plans d’eau, se développant à la fois sous l’eau et hors de l’eau. La lutte contre ces espèces, en vue de l’éradication totale ou du ralentissement de l’invasion, représente un défi de taille pour les gestionnaires. Une synthèse bibliographique des méthodes de lutte existantes po...

  6. Abundancia y riqueza de moluscos y crustáceos asociados a las raíces sumergidas del mangle rojo (Rhizophora mangle en la laguna de Bocaripo, Sucre, Venezuela

    Directory of Open Access Journals (Sweden)

    Jennellis Cedeño

    2010-10-01

    Full Text Available Las raíces de mangle son un importante hábitat para muchas especies. Se estudió la abundancia y riqueza de moluscos y crustáceos asociadas a las raíces sumergidas de Rhizophora mangle. Las muestras fueron recolectadas entre febrero 2005 y enero 2006, en la laguna de Bocaripo, costa norte del estado Sucre, Venezuela. Se establecieron cinco estaciones en la laguna; al azar en cada estación se escogieron dos raíces de mangle, fueron introducidas en bolsas plásticas; los organismos fueron obtenidos de la raíz raspando la superficie con un cuchillo, luego fueron separados y fijados en formalina al 10% para su posterior identificación. Se recolectaron 1 092 especimenes de moluscos, distribuidos en dos clases: Bivalvia y Gastropoda. La clase Bivalvia fue la más abundante con 943 individuos. La familia más representativa fue Mytilidae con 6 especies, siendo Musculus lateralis la especie dominante. Los crustáceos estuvieron representados por 372 organismos, pertenecientes a la clase Malacostraca, donde Panopeus herbstii (169 ind. fue la especie más abundante. Las familias Panopeidae, Porcellanidae y Majidae presentaron el mayor número de especies. La máxima abundancia se encontró en febrero (224 ind. con una riqueza de 25 especies y la mínima en noviembre (45 ind. con 12. Las estaciones 1 y 5 presentaron la mayor abundancia y riqueza de organismos, lo cual pudiera estar relacionado con condiciones ambientales favorables, como la mayor disponibilidad de microhábitats y oferta alimenticia; por el contrario la estación 4, presentó un ambiente más inhóspito, debido a los altos valores en la salinidad y temperatura, lo cual contribuye con la menor abundancia y riqueza de las especies presentes.Abundance and richness of mollusks and crustaceans associated to the submerged roots of red mangrove (Rhizophora mangle at Bocaripo Lagoon, Sucre, Venezuela. Mangrove roots are important habitats for many species. The abundance and richness of

  7. Prevalencia de síntomas depresivos e invarianza factorial de la Escala de Depresión del Centro de Estudios Epidemiológicos (CES-D) en población indígena mexicana.

    Science.gov (United States)

    Franco-Díaz, Karen Lizbeth; Fernández-Niño, Julián Alfredo; Astudillo-García, Claudia Iveth

    2018-05-01

    Introducción. La versión breve de la Escala de Depresión del Centro de Estudios Epidemiológicos (CESD) es un recurso factible para la tamización de los síntomas de depresión en la población general, pero no se ha reportado la prevalencia en la población indígena, ni su invarianza factorial en Latinoamérica.Objetivo. Describir la prevalencia de los síntomas de depresión y la invarianza factorial de la versión breve de la escala CES-D en población indígena mexicana.Materiales y métodos. Se hizo un estudio transversal en una muestra representativa de 37.165 adultos mexicanos de 20 a 59 años de edad. La identidad indígena se determinó mediante el propio reporte de la persona como hablante de una lengua indígena. Se conformaron ocho grupos de análisis según el sexo, el alfabetismo y el ser indígena. Se describió la prevalencia de los síntomas depresivos en cada grupo, así como la invarianza factorial de la configuración de los perfiles mediante un análisis factorial exploratorio. Las matrices de varianza y covarianza se compararon entre pares de perfiles usando el test modificado de Mantel.Resultados. La prevalencia de síntomas depresivos en mujeres indígenas que sabían leer fue de 16,8 % (IC95%: 13,4-20,3); en mujeres indígenas que no sabían leer, de 21,3 % (IC95%: 15,5-27,1); en hombres indígenas que sabían leer de 8,5 % (IC95%: 6,0-11,1), y en hombres indígenas que no sabían leer de 10,4 % (IC95%: 5,2-15,6). No se encontraron diferencias significativas en las cargas factoriales entre los perfiles.Conclusión. Se reportó una menor prevalencia de síntomas depresivos en indígenas que en la población no indígena. La escala CES-D en su versión breve mostró invarianza factorial al emplearla en la población indígena.

  8. Mensuração e características de dor após cesárea e sua relação com limitação de atividades Medida y características del dolor después de una cesárea y su relación con la limitación de actividades Measurement and characteristics of post-cesarean section pain and the relationship to limitation of physical activities

    Directory of Open Access Journals (Sweden)

    Lígia de Sousa

    2009-12-01

    Full Text Available Objetivo: Mensurar ecaracterizar a dor após cesárea e verificar sua relação com a limitação de atividades. Métodos: pesquisa descritiva com 60 puérperas após cesárea. Para avaliação da dor foram usadas a Escala Numérica e o Questionário de Dor McGill. As limitações de atividades foram avaliadas por instrumento elaborado pelas pesquisadoras. Resultados: a dor após a cesárea apresenta maiores escores no movimento de sentar e levantar. A dor é caracterizada como "incômoda", "que prende" e "que repuxa". Todas as participantes relataram que a dor limitava o movimento de sentar e levantar. Conclusão: foi possível observar que a dor após a cesárea é caracterizada como moderada. A dor promove limitação principalmente nas atividades de sentar e levantar e caminhar.Objetivo: Medir y caracterizar el dolor después de una cesárea y verificar su relación con la limitación de actividades cotidianas. Métodos: Investigación descriptiva con 60 puérperas después de una cesárea. Para evaluar el dolor fueron usadas la Escala Numérica y el Cuestionario del Dolor McGill. Las limitaciones de actividades fueron evaluadas por un instrumento elaborado por las investigadoras. Resultados: El dolor después de la cesárea presenta mayores puntajes en los movimientos de sentarse y levantarse. El dolor es caracterizado como "incomodo", "que sujeta" y "que se estira". Todas las participantes relataron que el dolor limitaba los movimientos de sentarse y levantarse. Conclusión: Fueposible observar que el dolor después de la cesárea es caracterizado como moderado. El dolor promueve limitaciones principalmente en las actividades de sentarse, levantarse y caminar.Objectives: To measure and characterize post cesarean section pain and to verify its relationship with limitations of physical activities. Methods: Descriptive study with 60 women in the post-operative period of cesarean section. Pain was measured with both the Numeric Scale and the

  9. Archivage électronique : spécifications relatives à la conception et à l'exploitation de systèmes informatiques en vue d'assurer la conservation et l'intégrité des documents stockés dans ces systèmes

    CERN Document Server

    Association Française de Normalisation. Paris

    2007-01-01

    Archivage électronique : spécifications relatives à la conception et à l'exploitation de systèmes informatiques en vue d'assurer la conservation et l'intégrité des documents stockés dans ces systèmes

  10. Efecto de cuatro manejos del suelo sobre la densidad de raíces absorbentes en durazno [prunus pérsica (l batsch] a 10 cm de profundidad

    Directory of Open Access Journals (Sweden)

    Andrés Gómez

    2011-10-01

    Full Text Available El árbol de Durazno (P. pérsica está constituido por dos partes estructurales: una epigea, conformada por el tronco que soporta el sistema caulinar, y otra hipogea que constituye el sistema radicular. Este último, de acuerdo con la base morfoanatómica y las funciones específicas, presenta varios tipos de raíces: absorbentes, de transición y de conducción. Las absorbentes (de color blanquecino translúcido son fisiológicamente muy activas y representanentre el 80 y el 85% de la totalidad del sistema radical. Aunque las raícesde los árboles frutales se desarrollan siguiendo un patrón genético, algunas condiciones medio ambientales producen variaciones morfológicas en su desarrollo. En este trabajo se estudió la densidad del aparato radical absorbente en el cultivo de Durazno (variedad Dorado, a 10 cm de profundidad. Se empleó la técnica volumen del cilindro, en función del manejo del suelo, utilizando 2 tipos de coberturas (cobertura viva, cobertura muerta, control dearvenses con herbicida y un referente tradicional con labranza. Los resultados mostraron que la cobertura con material vegetal muerto, sobre el suelo (10 cm de profundidad bajo el diámetro de la copa del árbol (160 cm, generóun mayor desarrollo del sistema radicular, evidente en una mayor densidad.

  11. EIA-CES Rehabilitation Engineering Seedbed

    Directory of Open Access Journals (Sweden)

    Juliana Velásquez Gómez

    2016-12-01

    Full Text Available La discapacidad es una interacción entre los estados de salud (enfermedades, lesiones, entre otros y los factores contextuales (factores ambientales y personales. En el semillero de Ingeniería de Rehabilitación de la Universidad EIA se evalúan usuarios en situación de discapacidad para realizarles productos de apoyo a la medida. Este semillero es voluntario y cuenta con recursos económicos limitados. Se caracteriza por tratar cada caso individualmente y no generalizar, ya que se tiene claro que cada persona tiene sus particularidades, así tengan el mismo diagnóstico, buscando satisfacer las necesidades que cada paciente tenga. Para la fabricación de los productos de apoyo se desarrolló un protocolo que busca que el producto final cumpla con los criterios de usabilidad (Facilidad de aprendizaje, eficiencia, entre otros.

  12. EIA-CES Rehabilitation Engineering Seedbed

    OpenAIRE

    Juliana Velásquez Gómez; Carolina Sierra Restrepo; María Clara Mejía Jaramillo; Manuela Vargas González; Juan Pablo Arango Velásquez; Paulina Restrepo Arango; Paula Andrea Gómez Vélez; Susana Fuentes Vélez

    2016-01-01

    La discapacidad es una interacción entre los estados de salud (enfermedades, lesiones, entre otros) y los factores contextuales (factores ambientales y personales). En el semillero de Ingeniería de Rehabilitación de la Universidad EIA se evalúan usuarios en situación de discapacidad para realizarles productos de apoyo a la medida. Este semillero es voluntario y cuenta con recursos económicos limitados. Se caracteriza por tratar cada caso individualmente y no generalizar, ya que se tiene claro...

  13. Factors associated with cesarean sections in a public hospital in Rio de Janeiro, Brazil Fatores associados à realização de cesáreas em uma maternidade pública do Município do Rio de Janeiro, Brasil

    Directory of Open Access Journals (Sweden)

    Eleonora D'Orsi

    2006-10-01

    Full Text Available Brazil has one of the world's highest cesarean section rates. Contributing factors include the organization of obstetric practice, physicians' attitudes, and women's preferences and decisions. This study aimed to identify factors associated with cesarean sections in a public maternity hospital in Rio de Janeiro. A case-control study was conducted with 231 cesarean sections (cases and 230 vaginal deliveries (controls. Hierarchical logistic regression analysis was performed, based on a conceptual model. Factors associated with increased odds of cesarean section were: primiparity; mother's age 20-34; last birth by cesarean; cervical dilatation 41 weeks. Factors associated with lower odds of cesarean were: gestational age O Brasil apresenta uma das maiores proporções de cesáreas do mundo. Fatores contribuintes para este fenômeno incluem organização da prática obstétrica, atitudes dos obstetras, preferências e decisões das mulheres. Com o objetivo de identificar fatores associados à realização de cesáreas, foi realizado estudo de caso-controle em uma maternidade pública do Município do Rio de Janeiro. Incluíram-se 231 partos por cesárea (casos e 230 partos vaginais (controles. Utilizou-se análise multivariada com regressão logística, as variáveis foram incluídas no modelo obedecendo à ordem hierárquica definida em modelo conceitual. Fatores associados à maior chance de cesárea: primiparidade; idade 20-34 anos; último parto por cesárea; dilatação cervical 41 semanas. Fatores associados à menor chance de cesárea: prematuridade; sinais de trabalho de parto ao sair de casa; uso de ocitocina e amniotomia. Propostas de modificação nos fatores estudados podem contribuir para redução da proporção de cesáreas.

  14. Correlation of Cesarean rates to maternal and infant mortality rates: an ecologic study of official international data Correlación de la tasa de cesáreas con las tasas de mortalidad materna e infantil: estudio ecológico basado en datos oficiales internacionales

    Directory of Open Access Journals (Sweden)

    Fernando Madalena Volpe

    2011-05-01

    Full Text Available OBJECTIVE: To correlate international official data on Cesarean delivery rates to infant and maternal mortality rates and low weight-at-birth rates; and to test the hypothesis that Cesarean rates greater than 15% correlate to higher maternal and infant mortality rates. METHODS: Analyses were based on the most recent official data (2000-2009 available for 193 countries. Exponential models were compared to quadratic models to regress infant mortality rates, neonatal mortality rates, maternal mortality rates, and low weight-at-birth rates to Cesarean rates. Separate regressions were performed for countries with Cesarean rates greater than 15%. RESULTS: In countries with Cesarean rates less than 15%, higher Cesarean rates were associated to lower infant, neonatal, and maternal mortality rates, and to lower rates of low weightat-birth. In countries with Cesarean rates greater than 15%, Cesarean rates were not significantly associated with infant or maternal mortality rates. CONCLUSIONS: There is an inverse exponential relation between countries' rates of Cesarean deliveries and infant or maternal mortality rates. Very low Cesarean rates (less than 15% are associated with poorer maternal and child outcomes. Cesarean rates greater than 15% were neither correlated to higher maternal nor child mortality, nor to low weight-at-birth.OBJETIVO: Correlacionar los datos oficiales internacionales sobre las tasas de parto por cesárea con las tasas de mortalidad materna e infantil y con la tasa de bajo peso al nacer, y someter a prueba la hipótesis que sostiene que una tasa de cesáreas mayor de 15% se correlaciona con tasas de mortalidad materna e infantil más elevadas. MÉTODOS: Los análisis se basaron en los datos oficiales más recientes disponibles (2000-2009 de 193 países. Se compararon modelos exponenciales con modelos cuadráticos para hacer un análisis de regresión de las tasas de mortalidad infantil, neonatal y materna, así como de las tasas de

  15. RESPIRACIÓN MICROBIAL Y DE RAÍCES EN SUELOS DE BOSQUES TROPICALES PRIMARIOS Y SECUNDARIOS (PORCE, COLOMBIA MICROBIAL AND ROOT RESPIRATION IN SOILS OF TROPICAL PRIMARY AND SECONDARY FORESTS ( PORCE, COLOMBIA

    Directory of Open Access Journals (Sweden)

    Álvaro Andrés Ramírez Palacio

    2008-06-01

    Full Text Available Los suelos son el mayor reservorio de carbono en los ecosistemas terrestres y a su vez la mayor fuente de CO2 atmosférico, el cual es producido mediante un proceso denominado respiración del suelo. El objetivo de este trabajo fue estimar las tasas de respiración del suelo y sus componentes (respiración de raíces y de microorganismos, y evaluar el control que sobre las tasas de emisión de CO2 ejercen factores como la humedad y la temperatura del suelo, en bosques primarios (BP y secundarios (BS de la región de Porce, Colombia. Para este fin se midió la emisión de CO2 del suelo durante un año, en 10 parcelas con una cámara de respiración de suelo conectada a un analizador de gases infrarrojo. La tasa promedia anual de respiración fue 15,91 (0,71 e.e. y 14,03 (0,75 e.e. C t · ha-1 · año-1 en BP y BS, respectivamente. La respiración de las raíces representó casi la mitad de la respiración total en ambos tipos de bosque. La variación estacional de la respiración total estuvo asociada principalmente a las diferencias de humedad del suelo. Los resultados sugieren que desde el suelo de los bosques tropicales se emiten cantidades considerables de carbono hacia la atmósfera, y que factores ambientales como la humedad y la temperatura del suelo, ejercen un control importante sobre las tasas de emisión. De este modo, un incremento en la emisión de CO2 desde los suelos de estos ecosistemas, en respuesta a los cambios ambientales, puede tener grandes implicaciones en el balance global del carbono.Soils are the largest carbon pool of terrestrial ecosystems as well as the largest source of atmospheric CO2 through a process called soil respiration. The purpose of this study was to estimate the soil respiration rates and its components (root and microbial respiration, and to evaluate the control of environmental factors such as soil humidity and temperature on emission rates of CO2 in primary (PF and secondary forests (SF of the Porce

  16. Condiciones para el análisis electrofóretico de proteínas apoplásticas de tallos y raíces de clavel (Dianthus caryophyllus L para estudios proteómicos

    Directory of Open Access Journals (Sweden)

    Ana Patricia Martinez Gonzalez

    2017-05-01

    Full Text Available En el presente estudio se describe un flujo de trabajo que puede ser aplicado a diferentes especies vegetales, con el fin de obtener extractos apoplásticos que puedan ser usados para análisis proteómicos. Para ello, usando tallos y raíces de clavel, se evaluaron parámetros claves para la extracción de estas proteínas. Se determinó que para esta especie (Dianthus caryophyllus L se debe usar la solución amortiguadora fosfato de sodio 0,1 M pH 6,5, cloruro de sodio 50 mM y 0,1% β-mercaptoetanol para la infiltración; con tres tiempos de vacío de 20 s a 70 kPa y centrifugación a 1000 x g durante 20 min a 4 ºC, seguido de precipitación y concentración de proteínas con el método (TCA-Ácido tricloroacético/acetona. Bajo estas condiciones, se obtienen extractos que permiten análisis electroforéticos en 2D de proteínas de apoplasto, usando para el isolectroenfoque tiras con gradientes de pH 5-8 para raíz y pH 3-10 para tallo. Las condiciones descritas permitirán profundizar sobre el papel de las proteínas apoplásticas en diversidad de fenómenos biológicos que involucren esta especie vegetal.

  17. Análisis cuantitativos de los principales constituyentes químicos de raíces de Echinacea purpurea y E. Angustifolia producidas en Costa Rica1

    Directory of Open Access Journals (Sweden)

    Jorge Loaiza

    2004-01-01

    Full Text Available Se cuantificó los fenilpropanoides libres: ácido clorogénico y ácido cichórico, glicosídicos (equinacósido; así como las alcamidas presentes en extractos de raíces de las plantas medicinales Echinacea purpurea y E. angustifolia, producidas en 3 localidades de Costa Rica: Los Santos a 1650 msnm, Santa Bárbara de Heredia a 1250 msnm y Ojo de Agua a 850 msnm. Conforme disminuyó la altitud de las zonas de siembra, también disminuyó la concentración de los metabolitos analizados. La concentración de los fenilpropanoides y del equinacósido (sintetizado exclusivamente por E. angustifolia producidos en Costa Rica, fue 100 y 34% mayor, respectivamente, que la concentración reportada para una muestra control proveniente de EE.UU. Las alcamidas se produjeron en un rango de 0,89-2,31% comparado con 0,004-0,36% reportado en EE.UU. En Costa Rica la presencia de alcamidas fue similar para las 3 zonas en estudio. Sin embargo, 2 de ellas presentaron un grado de isomerismo diferente al reportado en muestras de EE.UU. Estos resultados indican que en condiciones tropicales, no solo se puede producir Echinacea en un menor tiempo, sino también que las cantidades de metabolitos secundarios son mayores a las producidas por la planta en sus áreas de origen. La presencia de compuestos con diferente grado de isomerismo podría presentar nuevas alternativas de uso de esos metabolitos.

  18. Essai de classement typo-technologique des araires à partir des pièces métalliques découvertes en Gaule romaine en vue de leur reconstitution Setting up of a typological-technological classification method to try to reconstruct ards from metallic pieces found in Roman Gaul

    Directory of Open Access Journals (Sweden)

    André Marbach

    2008-04-01

    Full Text Available Les pièces métalliques d’instruments aratoires sont, pour la Gaule romaine, pratiquement les seuls éléments archéologiques à notre disposition nous permettant de reconstruire ces outils. Des auteurs tels que S.E. Rees (G.B., R. Pohanka (Autriche et surtout J. Henning (Europe du sud-est ont fait des propositions de reconstitution des instruments aratoires de cette époque. Que faut-il en penser ? Une méthode de recherche a été élaborée à partir d’une analyse fine des pièces métalliques d’un catalogue de ces pièces pour les Gaules. Les socs ont été classés en fonction de leur surface utile, de la forme de leur douille de fixation et de l’angle d’usure de la pièce avec le sol, quand il est observable. Pour les reilles, le classement est identique et la longueur de la soie est ici prise en compte. À partir des valeurs retenues pour ces pièces et d’une étude technique avec modélisation de l’instrument aratoire, les possibilités de reconstruction des araires ont été étudiées. On souhaite ainsi rappeler aux chercheurs combien il est important de publier les pièces retrouvées avec le maximum de précision, dans les dessins et les mesures. En conclusion, pour les araires à soc à douille, de nombreuses incertitudes demeurent, sauf pour les socs de petites surfaces utiles, qui sont généralement des araires manche-sep. Pour les araires à reille, la reconstruction des instruments semble accessible, y compris la longueur du timon de traction ou chambige. Quelques exemples concrets de reconstitution sont présentés, dont un araire tourne-oreille.Metallic pieces of tilling implements from Roman Gaul, are practically the only archaeological elements at our disposal to reconstruct the tools. Authors such as S.E. Rees (GB, R. Pohanka (Austria, and above all J. Henning (South East of Europe have made proposals concerning the reconstruction of tilling implements of that period. What is to be thought of these

  19. Gatifloxacin phase IV surveillance trial (TeqCES study) utilizing 5000 primary care physician practices: report of pathogens isolated and susceptibility patterns in community-acquired respiratory tract infections.

    Science.gov (United States)

    Pfaller, Michael A; Jones, Ronald N

    2002-09-01

    Recently FDA-approved fluoroquinolones like gatifloxacin possess enhanced activity against Gram-positive pathogens such as Streptococcus pneumoniae. However, experience with adverse events among previously used fluoroquinolones has led to expanded post-marketing investigations of clinical efficacy and safety. An open-label gatifloxacin trial was initiated in early 2000, using 2795 (>15000 enrolled cases) primary care providers for treatment of community-acquired respiratory tract infections (CARTI) such as community-acquired pneumonia (CAP), acute bacterial exacerbation of chronic bronchitis (ABECB), acute sinusitis. Microbiology specimens and sputum slides were referred to a reference laboratory, pathogens identified and reference antimicrobial susceptibility tests performed. Results were classified by infection site, geographic census region and patient profile/demographics. The most frequent pathogens were: for CAP (n = 384)-S. pneumoniae (37%) > Hemophilus influenzae (31%) > Moraxella catarrhalis (13%); for ABECB (528)-H. influenzae (37%) > M. catarrhalis (26%) > S. pneumoniae (17%); and for sinusitis (2691)-M. catarrhalis (29%) > H. influenzae (24%) > S. pneumoniae (17%). H. parainfluenzae (ABECB) and S. aureus (sinusitis) were also commonly isolated. CAP S. pneumoniae isolates had significantly less high-level resistance (5% at > or =2 micro g/ml) than those isolates from ABECB or sinusitis (13-15%). United States census zone differences in S. pneumoniae resistance were identified (greatest in West or East South Central, South Atlantic). S. pneumoniae macrolide resistance was high (23-33%) and H. influenzae clarithromycin susceptibility was only 56-62%. beta-lactamase rates in H. influenzae and M. catarrhalis were 21-29% and 88-92%, respectively. Only one S. pneumoniae was not susceptible to gatifloxacin, and this new fluoroquinolone was fourfold more potent than levofloxacin (MIC(50,) 0.25 vs. 1 micro g/ml). This Phase IV surveillance trial (TeqCES

  20. Spectroscopic study of near closed-shell nuclei Z = 50, by means of the ({sup 3}He,d) and (d, {sup 3}He) reactions on all even tin isotopes, and the ({sup 3}He, d) reaction on the A = 113 and A = 115 indium isotopes; Etude spectroscopique des noyaux au voisinage de la couche fermee Z = 50, au moyen des reactions ({sup 3}He, d) et (d, {sup 3}He) sur tous les isotopes pairs de l'etain, et de la reaction ({sup 3}He, d) sur les isotopes 113, 115 de l'indium

    Energy Technology Data Exchange (ETDEWEB)

    Harar, S. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1967-06-01

    A systematic study of ({sup 3}He, d) reactions at 18 MeV incident energy and (d, {sup 3}He) reactions at 22 MeV incident energy on {sup 112,114,116,118,120,122,124}Sn is presented. The distorted wave Born approximation (DWBA) is used to extract informations on (a) the transferred angular momentum l{sub p}, (b) the change of parity and (c) the spectroscopic factor. We have investigated the influence of the proton-neutron residual interaction on the spread of the pure proton configuration (particle or hole), and on the observed level sequence. Experimental results and predictions of the Kisslinger and Sorensen model are in reasonable agreement. A study of {sup 113,115}In ({sup 3}He, d) {sup 114,116}Sn reactions shows strong experimental evidence that the proton particle hole components are weak in the first excited states of tin nuclei. Furthermore, highly excited states ({approx} 4 to 6 MeV) having a simple structure with one predominant particle-hole configuration have been located. (authors) [French] Nous presentons une etude systematique des reactions ({sup 3}He, d) a 18 MeV et (d, {sup 3}He) a 22 MeV sur {sup 112,114,116,118,120,122,124}Sn. L'approximation des ondes deformees (DWBA) est utilisee pour obtenir des informations sur le moment angulaire transfere l{sub p}, sur le changement de parite et le facteur spectroscopique. Nous avons etudie l'influence de l'interaction residuelle proton-neutron sur la repartition de l'intensite a une seule particule ou trou de proton, et sur les sequences des niveaux observes. Les resultats experimentaux et les previsions theoriques du modele de Kisslinger et Sorensen sont en assez bon accord. L'etude des reactions {sup 113,115}In ({sup 3}He, d) {sup 114,116}Sn apporte la preuve experimentale que les composantes particule - trou de protons des premiers etats excites des noyaux residuels sont faibles. Elle permet aussi de localiser des niveaux a une energie d'excitation elevee ({approx} 4 a 6 Me

  1. Spectroscopic study of near closed-shell nuclei Z = 50, by means of the ({sup 3}He,d) and (d, {sup 3}He) reactions on all even tin isotopes, and the ({sup 3}He, d) reaction on the A = 113 and A = 115 indium isotopes; Etude spectroscopique des noyaux au voisinage de la couche fermee Z = 50, au moyen des reactions ({sup 3}He, d) et (d, {sup 3}He) sur tous les isotopes pairs de l'etain, et de la reaction ({sup 3}He, d) sur les isotopes 113, 115 de l'indium

    Energy Technology Data Exchange (ETDEWEB)

    Harar, S [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1967-06-01

    A systematic study of ({sup 3}He, d) reactions at 18 MeV incident energy and (d, {sup 3}He) reactions at 22 MeV incident energy on {sup 112,114,116,118,120,122,124}Sn is presented. The distorted wave Born approximation (DWBA) is used to extract informations on (a) the transferred angular momentum l{sub p}, (b) the change of parity and (c) the spectroscopic factor. We have investigated the influence of the proton-neutron residual interaction on the spread of the pure proton configuration (particle or hole), and on the observed level sequence. Experimental results and predictions of the Kisslinger and Sorensen model are in reasonable agreement. A study of {sup 113,115}In ({sup 3}He, d) {sup 114,116}Sn reactions shows strong experimental evidence that the proton particle hole components are weak in the first excited states of tin nuclei. Furthermore, highly excited states ({approx} 4 to 6 MeV) having a simple structure with one predominant particle-hole configuration have been located. (authors) [French] Nous presentons une etude systematique des reactions ({sup 3}He, d) a 18 MeV et (d, {sup 3}He) a 22 MeV sur {sup 112,114,116,118,120,122,124}Sn. L'approximation des ondes deformees (DWBA) est utilisee pour obtenir des informations sur le moment angulaire transfere l{sub p}, sur le changement de parite et le facteur spectroscopique. Nous avons etudie l'influence de l'interaction residuelle proton-neutron sur la repartition de l'intensite a une seule particule ou trou de proton, et sur les sequences des niveaux observes. Les resultats experimentaux et les previsions theoriques du modele de Kisslinger et Sorensen sont en assez bon accord. L'etude des reactions {sup 113,115}In ({sup 3}He, d) {sup 114,116}Sn apporte la preuve experimentale que les composantes particule - trou de protons des premiers etats excites des noyaux residuels sont faibles. Elle permet aussi de localiser des niveaux a une energie d'excitation elevee ({approx} 4 a 6 MeV), ayant une structure simple a

  2. Incidência de cesáreas segundo fonte de financiamento da assistência ao parto Incidence of cesarean delivery regarding the financial support source for delivery care

    Directory of Open Access Journals (Sweden)

    Marta Edna Holanda Diógenes Yazlle

    2001-04-01

    Full Text Available OBJETIVO: Estudar os tipos de partos de acordo com a categoria de internação da paciente, bem como as indicações de cesarianas mais freqüentemente referidas. MÉTODOS: A partir dos dados de um sistema de informações hospitalares, foi feita uma análise retrospectiva dos partos ocorridos no município de Ribeirão Preto, São Paulo, Brasil, no período de 1986-1995. Foram estudados: tipo de parto, categoria de admissão e diagnósticos referidos. RESULTADOS: Ocorreram 86.120 partos no período estudado, sendo 5,4% na categoria privada, 28,7% na categoria de pré-pagamento e 65,9% no sistema público (Sistema Único de Saúde -- SUS, observando-se uma diminuição nas categorias privada e SUS e aumento na categoria de pré-pagamento. A percentagem de cesáreas aumentou de 68,3% para 81,8% na categoria privada e de 69,1% para 77,9% na categoria pré-pagamento e diminuiu de 38,7% para 32,1% na categoria SUS. As principais indicações cesarianas referidas foram o sofrimento fetal, cujas incidências foram 9,5%, 10,9% e 9,0%, respectivamente, nas categorias particular, pré-pagamento e SUS; e distócia céfalo-pélvica cujas taxas foram 5,8%, 6,5% e 3,9%, respectivamente, nas mesmas categorias mencionadas. CONCLUSÃO: A incidência de cesariana variou segundo a categoria de internação, observando-se um gradiente crescente à medida que se elevou o padrão social das gestantes, não havendo correspondência com o risco obstétrico.OBJECTIVE: To study the types of delivery according to the category of patient admission and the most frequently reported indications for cesarean sections. METHODS: In a retrospective survey of deliveries performed in the municipality of Ribeirão Preto, São Paulo, Brazil, from 1986 to 1995, the type of delivery, category of admission and recorded diagnoses were assessed. Data were obtained from the Center of Hospital Data Processing of the Department of Social Medicine in the University of São Paulo, Ribeir

  3. Recuperar las raíces para recuperar el sentido: formación y producción de calidad en investigación cualitativa como responsabilidad ética

    Directory of Open Access Journals (Sweden)

    Maria del C. Chapela M.

    2015-09-01

    Full Text Available Resumen Este trabajo se preparó en el contexto del VI Congreso Iberoamericano de Investigación Cualitativa en Salud, llevado a cabo en la ciudad de Medellín, Colombia, entre el 15 y el 17 de octubre del 2014. El tema de este congreso se refiere a la responsabilidad ética y de justicia social que tiene la investigación cualitativa en salud (ics. Un tema principal en este sentido es el logro de calidad en la formación y producción cualitativa. En este trabajo me propongo sustentar y mostrar la responsabilidad ética y la preocupación por la justicia social inherente a la investigación cualitativa crítica en salud para después argumentar que la formación y producción de calidad en investigación cualitativa en salud es una responsabilidad ética de las y los investigadores. Señalo algunas de las condiciones en las que llevamos a cabo la ics en Iberoamérica, que es urgente v33s1a02remontar y argumento sobre la necesidad de buscar en nuestras raíces humanas iberoamericanas, posibilidades para mejorar esas condiciones, enfatizando en particular en los problemas de formación de investigadores y en la producción de trabajos que trasciendan en los campos de la salud y de la enfermedad en los cuales actualmente domina el pensamiento positivista médico-biológico ligado a los intereses del mercado. El trabajo que aquí presento es el resultado de reflexiones teóricas, epistemológicas, metodológicas y prácticas en diálogo con autores, colegas y su confrontación con la práctica. Abstract This paper was prepared in the context of the VI Ibero- American Congress of Qualitative Health Research, held in Medellín, Colombia, from October 15 to 17, 2014. The central topic was the ethical and social justice responsibility ingrained in Qualitative Health Research (QHR. One of the main topics in this regard was the achievement of quality in training and in QHR products. My purpose in this paper is to ground and show the ethical

  4. Composición mineral y comparación de raíces reservantes de variedades de batatas (Ipomoea batatas (L. Lam. cultivadas en la isla de La Palma, España

    Directory of Open Access Journals (Sweden)

    Adriana Isabel Montes Hernández

    2010-07-01

    Full Text Available Los minerales Na, K, Ca, Mg, Fe, Cu, Zn y Mn fueron determinados, mediante espectrofotometría de absorción atómica, en raíces de 15 variedades de batatas cultivadas en La Palma (De papa o maní, Parado, Cubana, Cubana de baselo gordo, Cubana de hoja redonda, Blanquita, Saucero o Lanzarotero, Pata de Gallo, Padrón de Seda, Alicantina, Amarillo de Año, De Lanzarote, Matojo, Matojo Fino y Rajada; las 5 primeras de cultivo corto y las 10 restantes de cultivo largo. Se realizó análisis de varianza y prueba de rango múltiple de Duncan a los datos de las variables estudiadas. Se calcularon los coeficientes de correlación de Pearson (r para establecer grados de relación de los minerales entre las variedades; prueba de t de Student para comparar clasificando a las muestras según ciclo de recolección (Temprana y Tardía; análisis factorial para interpretar las relaciones existentes a través factores y análisis discriminantes (de paso a paso con criterio de selección la lambda de Wilks (λ e introduciendo todas las variables validados a través de análisis de validación cruzada. El elemento mineral (en mg/kg presente en mayor concentración en la totalidad de las muestras fue K (2086 ± 418, seguido de Ca (974 ± 486 y Mg (244 ± 70, siendo el Zn el menos presente (1,12 ± 0,61. Las variedades con mayor contenido mineral fueron Alicantina (Ca: 1809 ± 327 y Cu: 2,97 ± 0,23 y Padrón de Seda (Mg: 435 ± 46 y Mn: 3,08 ± 0,49 y la de menor aporte fue Parado (Cu, Mn, Ca, K y Mg. Las variedades Tardías presentaron mayores concentraciones de Cu, Fe, Mn, Ca, K, Mg y menores de Zn y Na en relación a las variedades Tempranas (p < 0,05. Se evidenció que las concentraciones de Cu, Zn y Na presentaron alto número de correlaciones significativas. El análisis factorial permitió deducir que Mg, K y Fe son las variables que permiten caracterizar el sistema perdiendo un mínimo de información total. El porcentaje de casos originales

  5. Composición mineral y comparación de raíces reservantes de variedades de batatas (Ipomoea batatas (L. Lam. cultivadas en la isla de La Palma, España

    Directory of Open Access Journals (Sweden)

    Adriana Isabel Montes Hernández

    2010-06-01

    Full Text Available Los minerales Na, K, Ca, Mg, Fe, Cu, Zn y Mn fueron determinados, mediante espectrofotometría de absorción atómica, en raíces de 15 variedades de batatas cultivadas en La Palma (De papa o maní, Parado, Cubana, Cubana de baselo gordo, Cubana de hoja redonda, Blanquita, Saucero o Lanzarotero, Pata de Gallo, Padrón de Seda, Alicantina, Amarillo de Año, De Lanzarote, Matojo, Matojo Fino y Rajada; las 5 primeras de cultivo corto y las 10 restantes de cultivo largo. Se realizó análisis de varianza y prueba de rango múltiple de Duncan a los datos de las variables estudiadas. Se calcularon los coeficientes de correlación de Pearson (r para establecer grados de relación de los minerales entre las variedades; prueba de t de Student para comparar clasificando a las muestras según ciclo de recolección (Temprana y Tardía; análisis factorial para interpretar las relaciones existentes a través factores y análisis discriminantes (de paso a paso con criterio de selección la lambda de Wilks (λ e introduciendo todas las variables validados a través de análisis de validación cruzada. El elemento mineral (en mg/kg presente en mayor concentración en la totalidad de las muestras fue K (2086 ± 418, seguido de Ca (974 ± 486 y Mg (244 ± 70, siendo el Zn el menos presente (1,12 ± 0,61. Las variedades con mayor contenido mineral fueron Alicantina (Ca: 1809 ± 327 y Cu: 2,97 ± 0,23 y Padrón de Seda (Mg: 435 ± 46 y Mn: 3,08 ± 0,49 y la de menor aporte fue Parado (Cu, Mn, Ca, K y Mg. Las variedades Tardías presentaron mayores concentraciones de Cu, Fe, Mn, Ca, K, Mg y menores de Zn y Na en relación a las variedades Tempranas (p < 0,05. Se evidenció que las concentraciones de Cu, Zn y Na presentaron alto número de correlaciones significativas. El análisis factorial permitió deducir que Mg, K y Fe son las variables que permiten caracterizar el sistema perdiendo un mínimo de información total. El porcentaje de casos originales

  6. La matière noire, clé de l'univers ?

    CERN Document Server

    Combes, Françoise

    2015-01-01

    Si ces dernières années de nombreuses découvertes ont permis de mieux connaître notre Univers, 95 % de son contenu, constitué de matière et d énergie noires, nous est encore aujourd hui totalement inconnu. Quelle est la nature de cette matière noire, de ces particules exotiques, sans lesquelles ne pourraient se former les galaxies ? L ouvrage, rédigé par Françoise Combes astrophysicienne dont les travaux de recherche dans ce domaine sont unanimement reconnus fait le point sur l état actuel des connaissances, les découvertes les plus récentes et les prochains défis à relever.

  7. The inelastic scattering of medium energy {alpha} particles; Sur la diffusion inelastique des particules {alpha} a moyenne energie

    Energy Technology Data Exchange (ETDEWEB)

    Crut, M [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1960-07-01

    The aim of this work is to find out what are the properties of the so-called 'anomalous states' in medium weight nuclei. These states preferentially excited in the inelastic scattering of medium energy charged particles have an excitation energy at about 4 MeV for nuclei with Z {<=} 29 and in the range 2-3 MeV for high Z nuclei. From a combination of angular distribution data in the elastic and inelastic scattering of 30 MeV {alpha} particles, and correlation data between inelastic {alpha} particles and deexcitation {gamma} rays, we show that for even-even nuclei, we can attribute spin 3 and parity minus to these 'anomalous states'. This is quite in agreement with the interpretation of these levels suggested by Lane as due to collective octupole oscillations. We give a resume of the theories used in the analysis of the data and a description of the experimental set-up. (author) [French] Le but de cette etude est de determiner les proprietes des niveaux dits 'anormalement excites' lors de la diffusion inelastique des particules chargees de moyenne energie sur des noyaux de masse moyenne et lourde. L'energie de ces niveaux est de l'ordre de 4 MeV pour les noyaux avec Z {<=} 29 et de 2 a 3 MeV pour les noyaux de Z plus eleve. De l'examen des courbes de distribution angulaire des particules {alpha} de 30 MeV diffusees elastiquement et inelastiquement, et de la correlation angulaire entre {alpha} excitant ces niveaux 'anormaux' et {gamma} de desexcitation, on deduit que, dans le cas des pair-pair, on peut attribuer a ces niveaux spin 3 et parite moins. Ceci renforce l'hypothese emise par Lane qui attribue ces niveaux a des oscillations octupolaires de la surface du noyau. On donne un apercu des theories utilisees dans l'analyse des resultats et une description des dispositifs experimentaux. (auteur)

  8. Patterns of deliveries in a Brazilian birth cohort: almost universal cesarean sections for the better-off Padrones de partos en una cohorte de nacimientos: cesáreas casi universales para los riesgos Padrões dos partos em uma coorte de nascimentos: cesarianas quase universais para os ricos

    Directory of Open Access Journals (Sweden)

    Aluísio J D Barros

    2011-08-01

    Full Text Available OBJECTIVE: To describe the patterns of deliveries in a birth cohort and to compare vaginal and cesarean section deliveries. METHODS: All children born to mothers from the urban area of Pelotas, Brazil, in 2004, were recruited for a birth cohort study. Mothers were contacted and interviewed during their hospital stay when extensive information on the gestation, the birth and the newborn, along with maternal health history and family characteristics was collected. Maternal characteristics and childbirth care financing - either private or public healthcare (SUS patients - were the main factors investigated along with a description of C-sections distribution according to day of the week and delivery time. Standard descriptive techniques, Χ² tests for comparing proportions and Poisson regression to explore the independent effect of C-section predictors were the methods used. RESULTS: The overall C-section rate was 45%, 36% among SUS and 81% among private patients, where 35% of C-sections were reported elective. C-sections were more frequent on Tuesdays and Wednesdays, reducing by about a third on Sundays, while normal deliveries had a uniform distribution along the week. Delivery time for C-sections was markedly different among public and private patients. Maternal schooling was positively associated with C-section among SUS patients, but not among private patients. CONCLUSIONS: C-sections were almost universal among the wealthier mothers, and strongly related to maternal education among SUS patients. The patterns we describe are compatible with the idea that C-sections are largely done to suit the doctor's schedule. Drastic action is called for to change the current situation.OBJETIVO: Describir el padrón de los partos en una cohorte de nacimientos, comparando partos normales y cesáreos. MÉTODOS: Todos los recién nacidos de moradoras de área urbana de Pelotas (Sur de Brasil en 2004 fueron reclutados para una cohorte de nacimientos. Las madres

  9. Quelques conséquences de l'introduction de deux espèces de macrophytes, Elodea canadensis Michaux et Elodea nuttallii St. John, dans les écosystèmes aquatiques continentaux : exemple de la plaine d'Alsace et des Vosges du Nord (Nord-Est de la France

    Directory of Open Access Journals (Sweden)

    THIEBAUT G.

    1997-01-01

    Full Text Available L'introduction au XIXème et XXème siècle, de deux espèces d'élodées Elodea canadensis Michaux et Elodea nuttallii St. John, dans les cours d'eau du nord-est de la France, a induit des modifications dans la composition floristique et le fonctionnement des écosystèmes aquatiques. L'analyse comparative de la distribution géographique de ces deux hydrophytes dans les eaux calcaires (plaine d'Alsace et acides (Vosges du Nord a permis de préciser leur écologie. Après des phases successives d'expansion des deux espèces, celles-ci se sont intégrées dans les phytocénoses aquatiques. L'introduction dans les écosystèmes aquatiques d'Elodea canadensis et d'E. nuttallii a induit des phénomènes de compétition interspécifique, en faveur essentiellement d'Elodea nuttallii. Cette dernière apparaît comme l'espèce la plus compétitive dans les cours d'eau eutrophes de la plaine d'Alsace (aptitude à accumuler le phosphore, sensibilité moindre à l'azote ammoniacal. Les élodées peuvent réaliser une épuration biologique, mais provoquent, lors de leur décomposition, une eutrophisation secondaire des eaux en absence de faucardage.

  10. Análisis de la distribución de raíces de 12 patrones injertados con naranja "frost valencia" Citrus sinensis L. oesbeck de 14 años de edad, en condiciones climáticas de Palmira, Valle del Cauca Analysis of root distribution in 12 citrus rootstocks grown in Palmira, the Cauca Valley

    Directory of Open Access Journals (Sweden)

    Escobar T. William

    1992-12-01

    Full Text Available

    En el Centro Nacional de Investigaciones del ICA, Palmira, se estudió el sistema de raíces de 12 patrones injertados con naranja Frost Valencia, de 14 años de edad, sembrados en un suelo Franco-Arcilloso. Se tomaron muestras a 1.0, 1,5, 2.0 y 3.0 m de distancia de la base del árbol y a profundidades de 0-20, 20-40, 40-60, 60-80 Y 80-100 cm, considerando cada distancia. Los patrones que mostraron la mayor densidad de raíces fueron: Amblycarpa, Citrange Carrizo y Mandarina Cleopatra. Se encontró correlación directa y altamente significativa entre el sistema de raíces menores de 2 mm de diámetro con la altura y diámetro del árbol, lo mismo que con el volumen de la copa. Estos aspectos son de especial importancia para evaluar el grado de adaptación a diferentes condiciones de suelo, al momento de plantar un huerto.

    At the ICA National Research Center in Palmira a study of the root system of 12 rootstocks grafted with "Frost Valencia" orange 14 years old grown on clay-loam soil was conducted. Root samples were taken at distances of 1.0, 1.5, 2.0 and 3.0 m from stem and a depth of 0-20, 20-40, 40-60, 60-80 and 80-100 cm in each distances. The rootstocks Amblycarpa, Citrange Carrizo and Cleopatra Mandarin presented the greater root densities. The height, diameter and the foliage tree volume showed positive correlation whit a diameter lesser than two millimeter. That's special importance for the adaptation several soil's conditions.

  11. Caractérisation des différents types de fibres musculaires dans plusieurs espèces : production et utilisation d'anticorps monoclonaux dirigés contre les chaînes lourdes de myosine rapide IIa et IIb

    OpenAIRE

    Société Biocytex; Picard, Brigitte; Lefaucheur, Louis; Fauconneau, Benoit; Rémignon, Hervé; Cherel, Yan; Barrey, Eric; Nédelec, J.

    1998-01-01

    Des anticorps monoclonaux dirigés contre les chaînes lourdes de myosine (MHC : myosin heavy chain) de différentes espèces d’animaux : bovin, porc, poisson, poulet, dinde, cheval ont été produits. Ils ont été testés par immunohistologie sur des coupes de muscle squelettique chez le bovin, le porc, le poisson, le poulet et la dinde et par ELISA chez le cheval. Les différents anticorps retenus dans ce projet permettent de nouvelles applications pour l’étude du muscle squelettique. En particulier...

  12. Dinámica del carbono en sistemas agrícolas bajo siembra directa : nuevas evidencias obtenidas mediante el uso de 13 C sobre la importancia de las raíces, la calidad de los residuos y el laboreo

    OpenAIRE

    Mazzilli, Sebastián

    2015-01-01

    El carbono orgánico del suelo (COS) es uno de los principales determinantes de la productividad de los ecosistemas, afectando la fertilidad del suelo y su capacidad de secuestrar CO2. La agricultura es uno de los principales cambios de uso del suelo que afecta significativamente el COS. En esta tesis se examinan, mediante experimentos de campo y usando al 13C como trazador isotópico, tres aspectos de la dinámica de C en sistemas agrícolas: 1) la importancia de las raíces en la formación de CO...

  13. Caractérisation physico-chimique des sables usés de la fonderie

    African Journals Online (AJOL)

    SEI Joseph

    Liés avec des argiles ou des résines, les sables de fonderie sont utilisés pour confectionner des moules et des noyaux dans lesquels sont coulés les métaux en fusion. Après l'opération de démoulage des pièces métalliques, une grande partie des sables est réutilisée sur place par régénération, tandis que les sables usés ...

  14. Prevalence of urinary incontinence and pelvic floor muscle dysfunction in primiparae two years after cesarean section: cross-sectional study Prevalência de incontinência urinária e disfunção muscular do assoalho pélvico em primíparas dois anos após parto cesárea: estudo transversal

    Directory of Open Access Journals (Sweden)

    Angélica Mércia Pascon Barbosa

    2013-04-01

    Full Text Available CONTEXT AND OBJECTIVE There is uncertainty in the literature regarding the theory that obstetric events and pelvic floor injuries give rise to lower risk of subsequent urinary incontinence among women delivering via cesarean section than among women delivering vaginally. The objective of this study was to assess the two-year postpartum prevalence of urinary incontinence and pelvic floor muscle dysfunction and the factors responsible for them. DESIGN AND SETTING Cross-sectional study, conducted in a public university. METHODS 220 women who had undergone elective cesarean section or vaginal childbirth two years earlier were selected. Their urinary incontinence symptoms were investigated, and their pelvic floor muscle dysfunction was assessed using digital palpation and a perineometer. RESULTS The two-year urinary incontinence prevalences following vaginal childbirth and cesarean section were 17% and 18.9%, respectively. The only risk factor for pelvic floor muscle dysfunction was weight gain during pregnancy. Body mass index less than 25 kg/m 2 and normal pelvic floor muscle function protected against urinary incontinence. Gestational urinary incontinence increased the risk of two-year postpartum urinary incontinence. CONCLUSION Gestational urinary incontinence was a crucial precursor of postpartum urinary incontinence. Weight gain during pregnancy increased the subsequent risk of pelvic floor muscle dysfunction, and elective cesarean section did not prevent urinary incontinence. CONTEXTO E OBJETIVO É ainda controversa na literatura a teoria de que eventos obstétricos e traumas no assoalho pélvico representariam menor risco para mulheres submetidas ao parto cesárea do que para aquelas submetidas a parto vaginal, no tocante a subsequente incontinência urinária. O objetivo do estudo foi avaliar a prevalência de incontinência urinária e disfunção muscular do assoalho pélvico dois anos após o parto e os fatores responsáveis por elas

  15. Étude de cas : la consommation d'alcool et sa représentation sociale dans les séries télévisées américaines et françaises ces 15 dernières années.

    OpenAIRE

    Mentior, Nathalie

    2017-01-01

    Ce mémoire a comme objectif principal de comprendre la représentation sociale de la consommation d'alcool dans les séries télévisées américaines et françaises durant ces 15 dernières années. Mais également quelle influence que celles-ci peuvent-elles avoir sur les téléspectateurs. À travers deux volets : une partie théorique et une analyse de contenu. Le volet théorique établit différentes notions telles que : la représentation sociale de l'alcool et de l'alcoolisme, les stéréotypes de la con...

  16. Physico-Chimie des Atomcules d'Hélium antiprotonique: Modélisation de Processus réactifs en présence d'Antimatière

    Science.gov (United States)

    Sauge, Sébastien

    2000-07-01

    Environ 3%des antiprotons (p) stoppés dans l'hélium survivent plusieurs microsecondes, contre quelques picosecondes dans tout autre matériau. Cette métastabilité inhabituelle résulte d'une capture sur des états liés de l'atome exotique pHe+, dénommé atomcule car il s'apparente à la fois à un atome de Rydberg quasi-circulaire quasi-classique de grand moment angulaire l n-1 37et à une molécule diatomique composée d'un noyau chargé négativement et caractérisée par une forte excitation rotationnelle J=l. En dehors de cette structure duale originale accessible par spectroscopie laser, la physico-chimie de leur interaction avec d'autres atomes ou molécules a fait l'objet d'études microscopiques. Alors que les atomcules résistent à des millions de collisions dans l'hélium pur, des contaminants moléculaires comme H2 les détruisent immédiatement, y compris à basse température. Dans le cadre Born-Oppenheimer, nous interprétons l'interaction moléculaire, calculée par des techniques de chimie quantique {ab initio}, en termes de chemins réactifs classiques, qui présentent des barrières d'activation compatibles avec celles mesurées dans He et H2.Nous montrons par une approche Monte Carlo de trajectoires classiques que la thermalisation détruit fortement les populations initiales, portant la fraction estimée des états de capture à 3%. Nous étudions aussi la recombinaison dissociative pHe+ + e+ e -dans une approche de trajectoires classiques pour les noyaux: nous prédisons la synthèse d'antihydrogène avec un rapport de branchement de 10%, ainsi qu'une nouvelle classe d'atomcules métastables ?={p}, e+, 2e-, qui pourrait être confirmée par spectroscopie. Ce travail illustre la transférabilité des concepts de chimie physique à l'étude de processus exotiques en présence d'antimatière, et apporte un éclairage nouveau sur la physico-chimie des radicaux interstellaires froids.

  17. Differences in root distribution, nutrient acquisition and nutrient utilization by tropical forage species grown in degraded hillside soil conditions¹ Diferencias en la distribución de raíces, absorción y utilización de nutrientes por especies forrajeras tropicales en condiciones de suelos degradados de ladera

    Directory of Open Access Journals (Sweden)

    Arnulfo Gómez-Carabalí

    2010-04-01

    Full Text Available Low nutrient availability, especially phosphorus (P and nitrogen (N supply is the major limitation to forage production in acid infertile soils of the tropics. A field study was conducted at the farm ‘La Esperanza’ located in Mondomo, Department of Cauca, in the coffee growing zone of Colombia. The main objective was to determine differences in root distribution, nutrient (N, P, K, Ca, Mg and S acquisition and nutrient utilization of one C4 forage grass (Brachiaria dictyoneura and two C3 forage legumes (Arachis pintoi and Centrosema macrocarpum grown under two fertilization levels, cultivated either in monoculture or in association and harvested at four different ages.There were no significant differences in root biomass among the grass and legumes and their combinations. The native vegetation had the lowest root biomass; while the introduced grass (B. dictyoneura had the highest root length density among all materials at all depths and ages and the native vegetation had the highest specific root length. As expected, nutrient uptake increased with age and with high fertilization in all species. Centrosema macrocarpun had the highest N and Ca uptake among all plant materials tested. Uptake of P, K and Mg was greater in the grass B. dictyoneura than in the other plant species and combination planting at all ages. On the other hand, the grass had the lowest Ca uptake. The grass and its mixture with the legumes A. pintoi and C. macrocarpun had the highest S uptake. A highly significant (pLa baja disponibilidad de nutrientes, especialmente fósforo (P y nitrógeno (N es el mayor limitante para la producción de forrajes en los suelos ácidos de baja fertilidad del trópico. En la finca La Esperanza. localizada en Mondomo, departamento del Cauca, zona cafetera de Colombia, se llevo a cabo un estudio con el objeto de determinar las diferencias en la distribución de raíces, absorción y utilización de nutrientes (N, P, K, Ca, Mg, y S de una gram

  18. Life-time of hot nuclei; Temps de vie des noyaux chauds

    Energy Technology Data Exchange (ETDEWEB)

    Aboufirassi, M.; Bougault, R.; Brou, R.; Colin, J.; Durand, D.; Genoux-Lubain, A.; Horn, D.; Laville, J.L.; Le Brun, C.; Lecolley, J.F.; Lopez, O.; Louvel, M.; Mahi, M.; Meslin, C.; Steckmeyer, J.C.; Tamain, B. [Lab. de Physique Corpusculaire, Caen Univ., 14 (France); LPC (Caen) - CRN (Strasbourg) - IPN (Orsay) - GANIL Collaboration

    1998-04-01

    The study of the systems Ne + Au, Ar + Au and Kr + Au has allowed description of the de-excitation and particularly the evolution of the fragment emission time intervals as o function of the compound system excitation energy. The analysis of data obtained by the multidetector NAUTILUS for Pb + Au at 29 MeV/u has permitted the access to another time scale: the lifetime of the two partners before fragmentation. For this system and this energy the predominant process is primarily a two-body process analogue to that observed at lower energies (deep inelastic transfer). This mechanism can lead to a complete relaxation energy and consequently to low relative velocities between the two partners in the exit channel. In contrast to the low energy process where the two partners decay by evaporation, here the energy implied may lead to the rupture of one and/or the other partner in several fragments (2 to 5). For the the most relaxed events the excitation energies may reach the values of 6 MeV/u. Simulations were realized in which the entrance channel i.e. the relaxation of the two partners is described by a classical trajectory calculation. In the exit channel after a time {tau} one of the two partners splits in several fragments. The study of the trajectories of these fragments allows the determination of the angular distributions relative to the direction of the un-split partner. The comparison between this calculation and the data is given. The {tau} values vary from a negative value corresponding to a rupture during the interaction of two partners up to a {tau} of 200 fm/c. The best fit indicates a {tau} 100 fm/c, this showing that the lifetime of the splitting nucleus is of the order of 100 fm/c after separation of the two partners. By comparing this result with microscopic models one can obtain a better understanding of the system rupture scenario. This study is under way 4 refs.

  19. The search for new radioisotopes; La recherche de nouveaux noyaux et de nouveaux elements

    Energy Technology Data Exchange (ETDEWEB)

    Bernas, M [Institut de Physique Nucleaire, IN2P3/CNRS, 91 - Orsay (France); Armbruster, P [GSI, Max-Planck-Str., Darmstadt (Germany)

    2000-07-01

    Phosphorus-30 was the first artificial radioisotope, it was produced by F. and I. Joliot-Curie in 1934, since then 2460 new nuclei have been discovered. This document reviews the radioisotopes known and the methods used to separate them. The authors describe the discovery of new radioisotopes such as Nickel-78 produced in the fission of high energy uranium ions impinging on a lead target (IPN-GSI collaboration) and the discovery of Nickel-48 by a team CENBG-Ganil. All this experience is useful for the processing of nuclear wastes by using transmutation. (A.C.)

  20. Half-life distribution table of radioactive nuclei; Table de distribution des periodes des noyaux radioactifs

    Energy Technology Data Exchange (ETDEWEB)

    Gugenberger, P [Commissariat a l' Energie Atomique, Saclay(France). Centre d' Etudes Nucleaires

    1954-07-01

    This table allows to identify an element if its period is known. Data for this table were taken from the half-life values adopted by Hollander, PERLMAN and SEABORG (Rev. mod. Phys., 1953, 22 number 2). Moreover for each nucleus, the mass number, the charge number and the type of decay are given in the table. (author) [French] Cette table permet l'identification d'un element dont la periode est connue. Elle a ete etablie en utilisant les valeurs des periodes donnees par HOLLANDER, PERLMAN et SEABORG dans Rev. mod. Phys., 1953, 25 numero 2. On y trouve en outre, pour chaque nuclide, les caracteristiques suivantes: Z, A, modes de desintegration. (auteur)

  1. a noyaux gamma pour des échantillons de petites tailles

    African Journals Online (AJOL)

    detailed simulation study investigates the local and global performances of the considered estimators. The obtained ... Le biais asymptotique de ˆf2(x) est exprimé par la formule suivante: Biais{ ˆf2(x). } = { h. 2 xf (x), ... Le reste du document est organisé comme suit: la deuxi`eme section est consacrée essen- tiellement au ...

  2. The search for super-heavy ions; La quete des noyaux super-lourds

    Energy Technology Data Exchange (ETDEWEB)

    Grevy, St. [Grand Accelerateur National d' Ions Lourds (GANIL-LPC), IN2P3 - CNRS / Ensicaen et Universite, 14 - Caen (France); Stodel, Ch. [Grand Accelerateur National d' Ions Lourds (GANIL), CEA-CNRS-IN2P3, 14 - Caen (France)

    2003-07-01

    The authors present the search for heavy nuclei, they briefly draw a historical review of the production of heavy isotopes and then describe the means and possibilities the French GANIL (national great accelerator of heavy ions) facility offers. The different steps of the experimental process are described: production, selection, detection and identification. The production cross-sections are so weak that every parameter involved in the production process has to be optimized. It appears that the limit of our technological knowledge has been reached and unless an important technical step forward it seems impossible to go down below the pico-barn (10{sup -12}*10{sup -24} cm{sup 2}) for production cross-sections. The 2 remaining ways to improve the situation are: 1) to increase the intensity of the incident particle beam (today we have < 10{sup 13} pps), this implies that an important development about accelerators and ion sources has to be achieved, 2) the other way is to use radioactive ion beams, the excess of neutrons of the incident ion gives a better production rate and will allow us to reach the neutron-rich part of the stability island. (A.C.)

  3. Half-life distribution table of radioactive nuclei; Table de distribution des periodes des noyaux radioactifs

    Energy Technology Data Exchange (ETDEWEB)

    Gugenberger, P. [Commissariat a l' Energie Atomique, Saclay(France). Centre d' Etudes Nucleaires

    1954-07-01

    This table allows to identify an element if its period is known. Data for this table were taken from the half-life values adopted by Hollander, PERLMAN and SEABORG (Rev. mod. Phys., 1953, 22 number 2). Moreover for each nucleus, the mass number, the charge number and the type of decay are given in the table. (author) [French] Cette table permet l'identification d'un element dont la periode est connue. Elle a ete etablie en utilisant les valeurs des periodes donnees par HOLLANDER, PERLMAN et SEABORG dans Rev. mod. Phys., 1953, 25 numero 2. On y trouve en outre, pour chaque nuclide, les caracteristiques suivantes: Z, A, modes de desintegration. (auteur)

  4. From heavy nuclei to super-heavy nuclei; Des noyaux lourds aux super-lourds

    Energy Technology Data Exchange (ETDEWEB)

    Theisen, Ch

    2003-01-01

    The existence of super-heavy nuclei has been predicted nearly fifty years ago. Due to the strong coulomb repulsion, the stabilisation of these nuclei is possible only through shell effects. The reasons for this fragile stability, as well as the theoretical predictions concerning the position of the island of stability are presented in the first part of this lecture. In the second part, experiments and experimental techniques which have been used to synthesize or search for super-heavy elements are described. Spectroscopic studies performed in very heavy elements are presented in the following section. We close this lecture with techniques that are currently being developed in order to reach the superheavy island and to study the structure of very-heavy nuclei. (author)

  5. Implementación de un protocolo para la producción de raíces pilosas (hairy roots de uña de gato (Uncaria tomentosa mediante transformación con Agrobacterium rhizogenes Implementation of a protocol for the production of hairy roots of cat’s claw (Uncaria tomentosa by Agrobacterium rhizogenes mediated transformation

    Directory of Open Access Journals (Sweden)

    Giovanni Garro Monge

    2012-11-01

    Full Text Available Los beneficios para la salud registrados a partir del uso de metabolitos secundarios de la planta llamada uña de gato (Uncaria tomentosa han generado una fuerte demanda comercial, así como la extracción intensiva de esta especie en los países en los cuales se distribuye, con el consecuente deterioro de este recurso genético en su hábitat natural. Es por eso que resulta necesario implementar protocolos de cultivo de células y tejidos de esta especie, con el fin de lograr la síntesis de los compuestos en forma controlada. La corteza de las raíces es uno de los tejidos en los que se concentra la producción de estos compuestos, razón por la cual la producción de raíces de cabellera (hairy roots resulta ser una técnica alternativa para la producción a escala de los metabolitos de interés. En este proyecto se implementó un protocolo de agroinfección de microestacas de U. tomentosa utilizando cepas silvestres de Agrobacterium rizhogenes (AR1500 y A4RS, así como el mantenimiento en medio líquido de las raíces pilosas obtenidas. En colaboración con el Laboratorio de Biología Molecular del programa PIPRA (UC Davis, se determinó la eficacia del protocolo de agroinfección, así como el uso de otras herramientas moleculares para la detección de expresión génica, las cuales mostraron resultados satisfactorios en los ensayos de agroinfección, bajo las metodologías establecidas en el proyecto.The beneficial health proper ties registered of secondary metabolites produced by the plant cat’s claw (Uncaria tomentosa had generated a strong market demand and intensive extraction of this species in the countries where distributed, with the deterioration of this genetic resource in its natural habitat. Because of this, is necessary to implement protocols for cell and tissue culture of this species in order to achieve the synthesis of compounds in a controlled manner.The root bark is one of the tissues where the production of these

  6. Les plumes du Mexique et de la mondialisation des arts

    OpenAIRE

    Gruzinski, Serge

    2006-01-01

    Au XVIe siècle, les arts européens se diffusent en Amérique, en Afrique et en Asie dans le sillage de la monarchie catholique. Simultanément, des objets exotiques quittent l’Afrique, l’Asie et l’Amérique pour enrichir les collections des princes de l’Europe de la Renaissance. Les mosaïques des plumes réalisées au Mexique font partie de cette histoire qui est à la fois planétaire des arts de l’Europe, celle des métissages et celle de la domination ibérique. Nous essaierons de replacer ces chef...

  7. Penser la musique, Écouter les images. Lectures de Cahiers d’art, Jazz et Documents sur le jazz et le cinéma américains

    OpenAIRE

    Turquety, Diane

    2017-01-01

    De 1926 à 1931, les revues d’art ou plus largement d’actualité intellectuelle, Cahiers d’art, Jazz et Documents, couvrent de façon inédite l’actualité du jazz et du cinéma américains, notamment. Sous le signe du populaire, de l’Amérique et d’un apport « exotique » incarné par la communauté noire américaine, ces spectacles sont hissés en de nouvelles références artistiques vecteurs d’une modernité idéale. Le jazz et le cinéma parlant deviennent alors, progressivement et selon des orientations ...

  8. « Comme à l’époque de Suzie Wong ». Les mutations du red-light district de Wan Chai

    OpenAIRE

    Paris, Nicolas

    2011-01-01

    Le roman exotique Le monde de Suzie Wong et ses nombreuses adaptations immortalisent le red-light district de Wan Chai à Hong Kong à la fin des années 1950, mettant en scène marins américains, expatriés de l’Empire britannique et prostituées hongkongaises. Aujourd’hui, avec la mondialisation, Wan Chai est fréquenté par des migrantes de plusieurs pays d’Asie du Sud-Est. Pourtant, le red-light district est toujours associé dans la presse et les guides de voyage à « l’époque de Suzie Wong ». Ces...

  9. Programme Sahamalaza-Iles Radama de l’AEECL : étude et conservation des espèces menacées d’extinction de lémuriens dans le nord-ouest de Madagascar AEECL’s Sahamalaza-Iles Radama Program: study and conservation of threatened species of lemurs in north-west of Madagascar.

    Directory of Open Access Journals (Sweden)

    Alice Dumoulin

    2011-10-01

    Full Text Available L’AEECL, Association Européenne pour l’Etude et la Conservation des Lémuriens, est un consortium de parcs zoologiques et d’universités européennes mettant en commun leurs connaissances et leurs efforts en faveur de projets de recherche et de protection des lémuriens menacés d’extinction de Madagascar depuis plus de trente ans. Pour ce faire, l’AEECL mène ou finance des études afin d’améliorer les connaissances scientifiques concernant les lémuriens. Ces informations sont indispensables pour mettre en place les mesures concrètes adaptées pour protéger ces animaux. Ses travaux ont notamment aidé à la reconnaissance de la péninsule de Sahamalaza en tant que réserve de biosphère de l’UNESCO, en 2001 et à la création du parc national Sahamalaza-Iles Radama, en 2007, principal site de recherches menées par l’association. De plus l’AEECL met un point d’honneur à impliquer la population locale. Des associations communautaires locales ont été créées dans les villages de quatre communes. Elles ont le pouvoir de gérer les ressources naturelles de leur juridiction de façon durable.The European Association for the Study and Conservation of Lemurs (Association Européenne pour l’Etude et la Conservation des Lémuriens, AEECL is a consortium of European zoological gardens and universities who have joined forces to carry out conservation and research projects for Madagascar’s highly endangered lemurs since more than 30 years. AEECL implements or finances various different research projects to improve the scientific knowledge of lemurs. Information is essential to be able to develop comprehensive conservation and management plans to protect these animals. The work of AEECL has led to the implementation of a UNESCO Biosphere Reserve in Sahamalaza in 2001 and to the creation of the Sahamalaza-Iles Radama National Park in 2007. In addition to the research, AEECL is carrying out a community-based natural resource

  10. Remarques sur trois espèces de Gyrinides

    NARCIS (Netherlands)

    Régimbart, M.

    1887-01-01

    1. Dineutes Fairmairei Rég., Ann. Soc. Ent. France. 1882. p. 394. — La série d’exemplaires des îles Viti que vient de me communiquer Mr. Ritsema, et qui appartient à Mr. Neervoort van de Poll, se compose d’individus dont la taille, la forme et la coloration varient d’une façon tout à fait

  11. Correlation between the cystathionine-r-lyase (CES) and the ...

    African Journals Online (AJOL)

    Background: The infection of Helicobacter pylori (H. pylori) is one of the most important causes of gastric ulcer disease. The role of hydrogen sulfide (H2S) production in H. pylori-induced gastric ulcer disease. Aim: The expression of cystathionine-γ-lyase (CSE) was determined, and correlated with the severity of gastric ulcer ...

  12. Copper distribution in leaves and roots of plants growing on a copper mine-tailing storage facility in northern Chile Distribución de cobre en hojas y raíces de plantas que crecen sobre relaves mineros de cobre en el norte de Chile

    Directory of Open Access Journals (Sweden)

    CLAUDIA ORTIZ-CALDERÓN

    2008-12-01

    Full Text Available In a copper mine-tailing afforested we characterized the physicochemical properties of the substrate at vegetated and non-vegetated patches. We studied the accumulation of copper in roots and leaves of the species present at the site, to evaluate their phytoextraction and/or phytostabilization potential. The non-vegetated mine-tailing substrate showed a high contení of metals, mainly copper (> 2.5 g kg-1, a pH 7.4, high contení of salts and 5.0 % organic matler. Vegelaled palches al íhe lailing showed similar characlerislics of pH, salís and organic maller conlenl, and showed a lolal copper concenlralion lower íhan íhe conlenl found ai íhe non-vegelaled patches. Nine plant species present at the site were screened for copper accumulation and distribulion in rools and leaves, and polenlial for copper phyloexlraclion or phyloslabilizalion was suggesled. The nalive species Schinus polygamus and Atriplex deserticola, accumulaled over 1.2 g kg-1 copper in íheir leaves, showing íhal íhey are pseudomelallophyles for íhe melal. Five of íhe nine plañí species sludied were considered suilable for phyloexlraclion procedures and four were apt for phytostabilization of copper polluted sites. By making a screening of species growing on a copper polluted site, we were able to select plants adapted lo semi-arid environmental conditions and suitable for mine-tailings remediation purposes.En un tranque de relaves previamente forestado, se realizó una caracterización fisicoquímica del sustralo en sectores vegetados y no vegetados. Se esludió la acumulación de cobre en raíces y hojas de las especies présenles en el sitio de trabajo, con el objeto de evaluar su potencial fitoextractor y fitoestabilizador. El sustrato del sector no vegetado presentó un pH 7,4; altos contenidos de sales y 5,0 % de materia orgánica, además de un alto contenido de metales pesados, principalmente cobre (> 2,5 g kg-1. Los sectores vegetados del tranque de relaves

  13. Conduta anestésica em cesariana em gestante com aneurisma intracraniano não roto Conducta anestésica en cesárea en embarazada con aneurisma cerebral íntegro Anesthetic conduct in cesarean section in a parturient with unruptured intracranial aneurysm

    Directory of Open Access Journals (Sweden)

    Luciana de Souza Cota Carvalho

    2009-12-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O manuseio anestésico para cesariana programada em gestante com aneurisma intracraniano não roto é particularmente interessante, pois apresenta diversas particularidades relacionadas às alterações fisiológicas da gestação acrescida dos riscos de ruptura do aneurisma durante o procedimento anestésico. A literatura é escassa nesse assunto, sendo assim importante a divulgação dos casos. RELATO DO CASO: Gestante de termo, 31 anos, com aneurisma intracraniano não roto submetida à cesariana programada sob anestesia peridural simples. O procedimento evoluiu sem intercorrências para mãe e filho. CONCLUSÕES: Recomendações baseadas em evidências para anestesia obstétrica em pacientes portadoras de aneurisma intracraniano não roto não existem. Não há dados experimentais ou clínicos que confirmem ou refutem anestesia geral ou regional nesse contexto. Dessa forma, a decisão de qual técnica utilizar deve ser feita com bases individuais, ponderando os riscos e benefícios de cada procedimento e a experiência do profissional que irá conduzi-la.JUSTIFICATIVA Y OBJETIVOS: El manejo anestésico para la cesárea programada en embarazada con aneurisma cerebral íntegro es particularmente interesante, porque presenta diversas particularidades relacionadas con las alteraciones fisiológicas del embarazo y por añadidura, con los riesgos de ruptura del aneurisma durante el procedimiento anestésico. La literatura es parca en ese asunto, siendo muy importante la divulgación de los casos. RELATO DEL CASO: Embarazada de término, 31 años, con aneurisma cerebral no roto y sometida a la cesárea programada bajo anestesia epidural simple. El procedimiento evolucionó sin intercurrencias para la madre y el hijo. CONCLUSIONES: No existen recomendaciones basadas en evidencias, para la anestesia obstétrica en pacientes portadoras de aneurisma cerebral no roto. No hay datos experimentales o clínicos que confirmen o que

  14. TEORES SÉRICOS DE CORTISOL DE FÊMEAS CANINAS (Canis familiaris – LINNAEUS, 1758 SUBMETIDAS À CESARIANA SERIC LEVELS OF CORTISOL IN BITCHES (Canis familiaris – LINNAEUS, 1758 SUBMITTED TO AESARIAN SECTION Niveles séricos del cortisol en perras (Canis familiaris – Linnaeus, 1758 sometidas a cesárea

    Directory of Open Access Journals (Sweden)

    Diogo José Cardilli

    2009-12-01

    . The reserved serum was used to realization of cortisol measure by radioimmunoassay (on already described periods. The statistics analyzes were made by t test and Tukey. The cortisol levels presented difference (p< 0.05 in the dog of caesarian section (6.83 µg/dL but this didn’t differ (p> 0.05 on subsequent days (1.82 µg/dL, 24 hours later; 1.38 µg/dL, 48 hour later; 1.48 µg/dL, 10 days later. The middle values of control group were 3.43, 2.01, 3.59 e 1.72 µg/dL, in partum day, 24 hours later, 48 hours later and 10 days later. The stress because partum dystocic induced to liberation of cortisol, normalizing in subsequent days, but don’t have variation after cesarian (surgical stress don’t induced bigger liberation of cortisol or partum natural, composed compatible with the one found in the literature.

KEY WORDS: Bitches, caesarian section, cortisol.
Perras sometidas a cesárea por estar en situación distinta de la fisiológica, pueden presentar alteraciones séricas para se adaptaren a esa nueva condición de estrés. Una de las posibles alteraciones, es la concentración de cortisol durante el período peri-parto. Siendo así, el objetivo de ese estudio fue cuantificar los niveles séricos del cortisol en perras sometidas a cesárea en la fase de parto y posparto en la fase de parto y posparto (en el día del acto quirúrgico o parto, 24h, 48h y 10 días después. El método de radioinmunoensayo fue utilizado para la realización del dosaje de cortisol sérico (en los períodos ya descritos. La evaluación estadística fue realizada por medio de los testes t y Tukey. El nivel de cortisol sérico presentó diferencia (p< 0,05 en el día de la cesárea (6,83 µg/dL, pero no hubo diferencia estadística (p> 0,05 en los días consecutivos (1,82 µg/dL, 24 horas después; 1,38 µg/dL, 48 horas después; 1,48 µg/dL 10 días después. Los niveles medios del grupo control

  • LES PROLIFÉRATIONS VÉGÉTALES AQUATIQUES EN FRANCE :CARACTÈRES BIOLOGIQUES ET ÉCOLOGIQUES DES PRINCIPALESESPÈCES ET MILIEUX PROPICES.II. IMPACT SUR LES ÉCOSYSTÈMES ET INTÉRÊT POUR LECONTRÔLE DES PROLIFÉRATIONS.

    Directory of Open Access Journals (Sweden)

    PELTRE M. C.

    2002-04-01

    Full Text Available De nombreux milieux aquatiques de nature et d’usages divers sont plus ou moins régulièrement le siège de proliférations végétales. Le contrôle de celles-ci pose des difficultés, principalement liées à l’appréciation des déséquilibres induits dans le milieu et à celle des nuisances anthropiques qui en découlent. En effet, dans le cas d’un constat de prolifération, source et témoin d’un dysfonctionnement, le manque d’analyse objective des situations, les limites de compatibilité des différents usages du milieu, la mauvaise connaissance des végétaux en cause et du fonctionnement écologique des milieux sont autant de freins à une gestion cohérente de ces sites. La présentation de quelques exemples, à travers différents modes connus de gestion des milieux et de régulation des peuplements végétaux (notamment les méthodes mécaniques, chimiques ou biologiques, illustre la mise à profit des connaissances sur les caractéristiques biologiques et écologiques des macrophytes proliférants. La mise en Oeuvre de cette démarche devrait permettre à l’avenir de mieux évaluer les perturbations induites par les proliférations, d’intervenir si nécessaire dans de meilleures conditions, en vue d’envisager une restauration des écosystèmes concernés compatible avec une meilleure satisfaction des différents usages.

  • ANÁLISE DA FORMAÇÃO CURRICULAR DOS CURSOS DE ADMINISTRAÇÃO OFERECIDOS POR INSTITUIÇÕES FEDERAIS NA ZONA DA MATA MINEIRA À LUZ DA RESOLUÇÃO CNE/CES N° 4 - DE 13 DE JULHO DE 2005

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    Gustavo Bastos Braga

    2011-12-01

    Full Text Available No final do século XIX a administração surge como profissão, no Brasil somente na década de 40 iniciam-se os primeiros cursos. Em voga na nação brasileira pelos os altos salários torna cada vez mais importante a discussão sobre o currículo do administrador. Essa conjuntura contribuiu para o escopo deste artigo, verificar as semelhanças e a adequação a realidade local das matrizes curriculares dos cursos superiores de administração oferecidos por instituições federais na Zona da Mata Mineira. Como uma abordagem teórica fez-se um apanhado histórico dos ciclos dos currículos de administração, sob a luz de autores como Andrade e AMBRONI, culminando em uma análise da legislação vigente. Para tal objetivo, utilizou-se uma abordagem quantitativa e qualitativa, através análise de frequência das cargas horárias dedicadas a cada eixo de competência de acordo com a Resolução CNE/CES n° 4, de 13 de julho de 2005, nos cursos estudados. Os resultados apontaram a presença de grades excessivamente distintas e, em alguns casos, não se preocupando em atender a necessidade local.

  • Anestesia para cesariana em gestante com hipoplasia de aorta distal: relato de caso Anestesia para cesárea en embarazada con hipoplasia de aorta distal: relato de caso Anesthesia for cesarean section on a pregnant woman with hypoplasia of the distal aorta: case report

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    Leonardo de Andrade Reis

    2008-02-01

    ésico adequado à realização do ato cirúrgico.JUSTIFICATIVA Y OBJETIVOS: Anomalías vasculares maternas, potencialmente graves para el feto, pueden colocar en riesgo la perfusión uterina, suscitando cuidados mucho más puntuales por parte del equipo anestésico. El objetivo de este relato fue mostrar la conducta anestésica para operación en cesárea en una embarazada con hipoplasia de aorta distal, bien debajo de la emergencia de las arterias renales, con estenosis de la arteria renal y falta de arterias ilíacas. RELATO DEL CASO: Paciente de 30 años, 54 kg, en el 2° embarazo con una cesárea anterior sin intercurrencias. Durante la realización de ecografía de gestación en la 12ª semana se observó una interrupción de la aorta bien debajo de la salida de las arterias renales. A la paciente se le realizó cineangiocoronariografía que mostró hipoplasia de la aorta distal por debajo de las arterias renales, con ausencia de las arterias ilíacas. Durante la investigación clínica la paciente se mostró asintomática, con excepción de hipertensión arterial y claudicación a los grandes esfuerzos. La paciente fue sometida a la anestesia peridural continua, con titulación de la dosis anestésica necesaria para la realización de la cesárea. Inicialmente se inyectaron 50 mg de bupivacaína a 0,5% sin vasoconstrictor y 10 µg de sufentanil. Quince minutos después, la anestesia fue complementada con 25 mg más de bupivacaína a 0,5%, lo que fue suficiente para alcanzar un adecuado nivel de bloqueo. La cesárea transcurrió sin intercurrencias y el niño nació en buenas condiciones clínicas. CONCLUSIONES: El uso de anestesia peridural continua con dosis fraccionadas demostró ser una técnica anestésica segura para la realización de este procedimiento por reducir los riesgos de hipotensión arterial materna inherente al bloqueo espinal y también por minimizar la transferencia placentaria de fármacos que ocurren cuando se usa la anestesia general. La titulaci

  • LA SITUATION DES ÉCREVISSES EN FRANCE RÉSULTATS DES ENQUÊTES NATIONALES RÉALISÉES ENTRE 1977 ET 2006 PAR LE CONSEIL SUPÉRIEUR DE LA PÊCHE

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    COLLAS M.

    2007-07-01

    Full Text Available Depuis la fin du XIX° siècle, la distribution des écrevisses en France a connu de profonds bouleversements, et l’introduction d’écrevisses allochtones en provenance essentiellement du continent nord-américain, a irrémédiablement modifié le paysage astacologique français et européen. Les quatre enquêtes réalisées en France par le Conseil Supérieur de la Pêche depuis 1977, ont permis de suivre l’évolution des différentes espèces d’écrevisses recensées sur le territoire national, mettant à chaque fois en évidence la forte expansion des espèces exotiques et le recul des espèces natives. L’enquête de 2006 n’échappe pas à cette tendance et la situation de nos trois espèces d’écrevisses doit désormais être considérée comme alarmante. Deux de ces espèces se caractérisent par un statut de conservation proche de l’extinction (Austropotamobius torrentium et Astacus astacus alors que la troisième, Austropotamobius pallipes est « réfugiée » sur les secteurs apicaux des bassins versants, confinée sur des zones soumises aux premières manifestations du changement climatique et isolées par les espèces exotiques qui progressent de plus en plus vers l’amont. En effet, l’écrevisse du Pacifique (Pacifastacus leniusculus, mais aussi l’écrevisse rouge de Louisiane (Procamabrus clarkii, sont les espèces qui montrent la plus forte expansion géographique durant la période 2001-2006. Partout elles apparaissent comme des concurrents redoutables, plus agressifs, résistants aux pathologies, capables de coloniser des habitats variés…. Ces deux espèces en particulier étendent leur aire de répartition et colonisent chaque année de nouveaux départements, de nouveaux cours d’eau, éliminant par là même, les espèces autochtones. L’expansion des écrevisses introduites, l’arrivée récente en France d’une nouvelle espèce (Orconectes juvenilis et les modifications de la Loi autorisant dor

  • Estratégia anestesiológica para cesariana em paciente portadora de deficiência de fator XI: relato de caso Estrategia anestesiológica para cesárea en paciente portadora de discapacidad de Factor XI: relato de caso Anesthetic strategy for cesarean section in a patient with factor XI deficiency: case report

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    Norma Sueli P Módolo

    2010-04-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A deficiência do fator XI é uma doença hematológica rara na população. A hemofilia C (deficiência do fator XI ocorre em ambos os sexos e normalmente não apresenta qualquer sintomatologia, podendo manifestar-se apenas como hemorragia pós-cirúrgica. É uma doença autossômica recessiva, homozigótica ou heterozigótica, e sua gravidade depende dos níveis de fator XI. O objetivo desse relato foi apresentar a estratégia anestésica em paciente portadora de hemofilia C. RELATO DO CASO: Paciente com 32 anos, gesta I/para 0, 39 semanas de gestação programada para cesariana eletiva. Paciente portadora de deficiência de fator XI. Exame clínico e laboratorial sem alterações. Conforme orientação do hematologista, no dia da cesárea a paciente usou prometazina 25 mg; hidrocortisona 500 mg, devido a reações transfusionais prévias, e plasma 10 mL-1.kg-1 num total de 700 mL. Após 2 horas foi submetida ao bloqueio subaracnóideo sob monitorização de rotina. Hidratação com RL 2000 mL. Procedimento anestésico-cirúrgico sem intercorrências. A paciente evoluiu no pós-operatório sem intercorrências, sendo que no 3º DPO fez uso de plasma fresco congelado (PFC 10.mL-1.kg-1 com o objetivo de evitar sangramento pós cirúrgico tardio. CONCLUSÕES: O objetivo do caso foi apresentar o protocolo anestésico para pacientes portadores de hemofilia C e alertar para a necessidade de investigação em caso de antecedente de sangramento pós-operatório, quando um estudo da coagulação deve ser realizado antes de qualquer procedimento invasivo e, se um TTPA prolongado for encontrado, torna-se imperativo pesquisar a deficiência desse fator.JUSTIFICATIVA Y OBJETIVOS: La discapacidad del factor XI es una enfermedad hematológica rara en la población. La hemofilia C (discapacidad del factor XI, ocurre en los dos sexos y normalmente no presenta ninguna sintomatología, y se puede manifestar apenas como hemorragia post

  • Cesariana em paciente com doença de von Willebrand associada à infecção pelo HIV: relato de caso Cesárea en paciente con enfermedad de von Willebrand asociada a la infección por el HIV: relato de caso Anesthesia for cesarean section in patient with von Willebrand's disease and HIV infection: case report

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    Vanessa Rezende Balle

    2004-12-01

    Willebrand y HIV positiva sometida a cesárea. RELATO DEL CASO: Paciente de 24 años, portadora de anemia microcítica, enfermedad de von Willebrand y HIV, llegó a la emergencia obstétrica en inicio de trabajo de alumbramiento. No realizó prenatal. Fue indicada cesárea a fin de disminuir los riesgos de transmisión vertical en paciente con carga vírica de HIV desconocida. Presentaba hematomas por el cuerpo e historia de hematoma de pared abdominal en cesárea anterior. Los tests de coagulación estaban un poco alterados. Después de infusión de concentrado de factor VIII fue realizada anestesia general. Madre y recién nacido presentaron evolución satisfactoria. CONCLUSIONES: La evaluación de manifestaciones clínicas en pacientes con coagulopatia es fundamental en la decisión del tipo de anestesia que será indicada para cada paciente. La evaluación debe ser individualizada, considerando los riesgos y beneficios de la técnica escogida. En estas pacientes, se debe siempre restringir al máximo la indicación de interrupción de la gestación por vía alta, optándose siempre por los métodos menos invasivos. La terapia con concentrado de factor VIII es actualmente la mejor opción de tratamiento, corrigiendo la deficiencia específica y dismunuyendo los riesgos de transmisión vírica.BACKGROUND AND OBJECTIVES: Von Willebrand's disease is the most common hereditary coagulation disorder in young women. The incidence of HIV infection among women has been progressively increasing, and vertical transmission may account for 25% of cases. This report aimed at describing the case of an HIV-positive patient with von Willebrand's disease scheduled for cesarean section. CASE REPORT: Female HIV-positive patient, 24 years old, with microcytic anemia and von Willebrand's disease, admitted to the emergency room in early labor. She had no pre-natal care. Cesarean section was indicated to lower vertical transmission risks since HIV viral count was unknown. Patient had hematomas

    1. High spin exotic states and new method for pairing energy; Etats exotiques a hauts spins et nouvelle methode pour l`energie d`appariement nucleaire

      Energy Technology Data Exchange (ETDEWEB)

      Molique, H.

      1996-01-19

      We present a new method called `PSY-MB`, initially developed in the framework of abstract group theory for the solution of the problem of strongly interacting multi-fermionic systems with particular to systems in an external rotating field. The validity of the new method (PSY-MB) is tested on model Hamiltonians. A detailed comparison between the obtained solutions and the exact ones is performed. The new method is used in the study of realistic nuclear Hamiltonians based on the Woods-Saxon potential within the cranking approximation to study the influence of residual monopole pairing interactions in the rare-earth mass region. In parallel with this new technique we present original results obtained with the Woods-Saxon mean-field and the self-consistent Hartree-Fock approximation in order to investigate such exotic effects as octupole deformations and hexadecapole C{sub 4}-polarizing deformations in the framework of high-spin physics. By developing these three approaches in one single work we prepare the ground for the nuclear structure calculations of the new generation - where the residual two-body interactions are taken into account also in the weak pairing limit. (author). 2370refs.

    2. Recherche de la production exotique de paires de quarks top de même signe au LHC avec le détecteur ATLAS

      CERN Document Server

      Berlendis, Simon; Smith, Christopher

      The Standard Model, which describes the particle interactions at quantum level, is an imperfect theory. It has several theoretical problems and is unable to explain astrophysical observations like the dark matter and the baryonic asymmetry of the universe. Several beyond-standard models have been proposed to solve some of these issues, and predict new-physics phenomena at high energy. The aim of this thesis is to search for these phenomena in proton-proton collisions produced by the Large Hadron Collider at a center-of-mass energy of 13 TeV. Part of the studies presented in this thesis was dedicated to the search for production of same-sign top quarks based on R-parity violating supersymmetric models. These processes lead to a signature of same-sign leptons and b-jets, which have the advantage to be lowly contaminated by the Standard Model background. The studies presented in this thesis focused on two analyses, both searching for new-physics phenomena of different nature in same-sign leptons events in data r...

    3. Anestesia para cesariana em paciente portadora de cardiomiopatia hipertrófica familiar: relato de caso Anestesia para cesária en paciente portadora de cardiomiopatía hipertrófica familiar: relato de caso Anesthesia for cesarean section in a patient with familiar hypertrophic cardiomyopathy: case report

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      Renato Mestriner Stocche

      2007-12-01

      caracterizada por hipertrofia del septo ventricular y grado variable de estenosis aórtica subvalvar. En esa enfermedad, el aumento de la contratilidad del miocardio y la disminución de la resistencia vascular periférica pueden agravar la obstrucción de la vía de salida del VE, produciendo arritmia e isquemia cardiaca. Este relato quiso discutir el manoseo anestésico para cesárea en paciente con CHF. RELATO DEL CASO: Paciente con 33 semanas de embarazo y diagnóstico previo de CHF presentó en el holter de 24 horas 22 episodios de taquicardia ventricular no sustentada (TVNS y 2 episodios de taquicardia ventricular sustentada (TVS. Refería episodios de palpitación, disnea y dolor precordial de corta duración. La paciente fue medicada con atenolol y presentó control de los síntomas y de las arritmias cardiacas. Con 38 semanas y 5 días de embarazo la paciente fue sometida a la cesárea electiva. Además de la habitual monitorización contó con el análisis de segmento ST y presión arterial invasiva. Se utilizó anestesia intradural-epidural con inyección de 5 µg de sunfentanil en la raqui seguida de administración de bupivacaína a 0,375% en dosis de incremento hasta alcanzar una altura de T6 (total de 16 mL. Se usó metaraminol como vasopresor. No hubo hipotensión arterial materna u otras complicaciones en el perioperatorio. CONCLUSIONES: La anestesia general se usa con frecuencia para cesáreas de pacientes con CHF. La anestesia intradural-epidural con instalación lenta del bloqueo fue una alternativa segura. En esas pacientes, el aumento de la contratilidad miocárdica debe ser evitado, y si fuere necesario se debe utilizar un a-agonista para la corrección de hipotensión arterial materna.BACKGROUND AND OBJECTIVES: Familiar Hypertrophic cardiomyopathy (FHC is a rare hereditary cardiac disorder characterized by hypertrophy of the ventricular septum and variable degrees of subvalvular aortic stenosis. In this disease, the increase in myocardial contractility

    4. Bloqueo de los nervios iliohipogástrico e ilioinguinal para analgesia posquirúrgica en cesárea tipo Pfannenstiel realizada bajo anestesia general: ¿qué concentración del anestésico local usar? Iliohypogastric and ilioinguinal block for postsurgical analgesia after pfannenstiel cesarean section performed under general anaesthesia

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      Héctor Iván García García

      1998-03-01

      Full Text Available El bloqueo bilateral de los nervios Iliohipogástrico e Ilioinguinal con bupivacaína al 0.5% puede proveer analgesia luego de cesárea con incisión de Pfannenstiel aunque la cantidad de droga usada está cerca de la dosis máxima segura. Diseñamos este estudio para comparar el efecto analgésico de la bupivacaína al 0.5% y diluida al 0.25%. Se incluyeron treinta pacientes aleatoriamente asignadas a un grupo de estudio (bupivacaína 0.25%, n= 15 y uno de control (bupivacaína 0.5%, n=15. Se evaluaron las pacientes con una Escala Visual Análoga (EVA a las O, 4, 8, 12 y 24 horas posoperatorias por médicos que no sabían a qué grupo pertenecían y sólo en caso de necesidad se prescribió analgesia IM con Diclofenaco. Los puntajes de analgesia y los requerimientos de anal. gesia complementaria fueron notoriamente simila. res en ambos grupos y no hubo diferencias estadísticamente significativas. Concluimos que el bloqueo de estos nervios es una técnica analgésica efectiva (el dolor siempre estuvo en promedio por debajo de 4 en la EVA, que no es afectada por la dilución del anestésico y que además es segura pues no se presentaron complicaciones. The Iliohypogastric and Ilioinguinal bilate. ral block with 0.5% bupivacaine can provide analgesia after Pfannenstiel cesarean section although the required amount of the drug is near the maximum secure dose. We designed this study in order to compare the analgesic effect of 0.5% bupivacaine and diluted 0.25% bupivacaine. Thirty patients were included in the study and asigned in aleatory form to either a study (0.25% bupivacaine n=15 or a control group (0.5% bupivacaine n=15. They were evaluated with the Visual Analogue Scale (VAS at 0,4,8,12,24 postoperative hours by physicians who did not know the group of the patient and prescribed intramuscular analgesia with Dicofenac only if required. The analgesia scores and the complementery analgesia requirements were similar in both groups and there were

    5. Representações e experiências das mulheres sobre a assistência ao parto vaginal e cesárea em maternidades pública e privada Women's representations and experiences with vaginal and cesarean delivery in public and private maternity hospitals

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      Andréa de Sousa Gama

      2009-11-01

      Full Text Available Este estudo analisa as diferentes representações e experiências quanto ao parto vaginal e cesárea de mulheres de diferentes estratos sócio-econômicos, bem como a natureza das relações profissionais de saúde/usuárias no contexto institucional em que estão inseridas. A pesquisa de natureza qualitativa foi desenvolvida em três maternidades do Município do Rio de Janeiro, Brasil, sendo uma pública, uma conveniada com o SUS e uma particular, com mulheres que tiveram os dois tipos de parto. Os resultados revelam que o modelo de organização dos serviços público e privado apresentam variações que produzem diferentes tipos de assistência e de relação entre os profissionais de saúde e as usuárias, dando forma a experiências distintas entre as mulheres pesquisadas. Todavia, ao empreendermos uma crítica assentada nas relações de gênero, podemos verificar que o modelo de assistência ao parto permanece submetendo quem deve ser sujeito e reproduzindo o projeto da medicalização - mesmo que este processo se manifeste de formas diferenciadas entre os grupos estudados -, o que reduz o campo da assistência e inviabiliza um lugar de poder diferenciado das usuárias.This study analyzes the different representations and experiences of women from different social classes, including issues related to their relations with hospital staff in different institutional settings. This qualitative study focused on women who had experienced both types of delivery, in three maternity hospitals in Rio de Janeiro, Brazil (one public, one fully private, and another private under an outsourcing agreement with the public health system. The study showed that variations in public and private service models result in different types of delivery care and different relations with staff, and are reflected in different birthing experiences for the women. However, a critical gender perspective shows that in both cases, the service models reproduce the

    6. Behaviour of enzymatic activities and root elongation in Argiudoll soils from the Argentine Humid Pampa treated with biosolids Comportamiento de actividades enzimáticas y elongación de raíces en suelos Argiudoles de la Pampa Húmeda, Argentina, tratados con biosólidos

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      E.B.R. Perotti

      2008-06-01

      Full Text Available The incorporation of biosolids to soil is a strategy aiming at the re-location of these materials in the environment with a useful end: soil fertilization. In this work, the response of two Argiudoll soils (one with more than 100 years of agriculture and the other, a virgin one to biosolid incorporation was studied under laboratory conditions. To measure this response, soil enzymatic biodescriptors, such as dehydrogenase and urease activities, and tests related to plant physiology (the root elongation test were employed. The addition of the biosolid to both soils had a stimulating effect though different on each soil according to the added dose. Adjustment of the regression line for dehydrogenase activity with root elongation was positive and statistically significant (pLa incorporación de biosólidos al suelo es una estrategia que tiene como objetivo la reubicación de estos materiales en el ambiente con un fin útil, como es la fertilización del suelo. En este trabajo se estudió, en condiciones controladas de laboratorio, la respuesta de dos suelos Argiudoles (uno con más de 100 años de agricultura y otro virgen frente a la perturbación físico-química y biótica que genera la incorporación de un biosólido. Para medir esta respuesta se emplearon dos biodescriptores edáficos (las actividades deshidrogenasa y ureasa y un tercero referido a la fisiología vegetal, la prueba de elongación de raíces. La incorporación del biosólido en ambos suelos, en general no deprimió el funcionamiento de las actividades enzimáticas estudiadas; contrariamente, según la dosis aportada tuvo un efecto estimulante, aunque diferente, entre ambos suelos. El ajuste de la recta de regresión de la actividad deshidrogenasa con la elongación de las plántulas fue positivo y altamente significativo, lo que indica la complementaridad de ambos descriptores. Los resultados obtenidos sugieren que los biodescriptores empleados resultaron aptos para estudiar el

    7. Anestesia subaracnóidea para cesariana em paciente portadora de esclerose múltipla: relato de caso Anestesia subaracnoidea para cesárea en paciente portadora de esclerosis múltiple: relato de caso Subarachnoid anesthesia for cesarean section in a patient with multiple sclerosis: case report

      Directory of Open Access Journals (Sweden)

      Fabiano Timbó Barbosa

      2007-06-01

      Full Text Available JUSTIFICATIVA E OBJETIVOS: A esclerose múltipla é uma doença adquirida que se caracteriza por áreas desmielinizadas no encéfalo e na medula espinal. O quadro clínico depende das áreas anatômicas acometidas. As principais causas de morte são infecção, falência respiratória e estado de mal epiléptico. Ocorre em pacientes geneticamente predispostos após contato com fatores ambientais, principalmente os vírus. O objetivo desse relato foi apresentar a técnica anestésica adotada em paciente com esclerose múltipla submetida à cesariana. RELATO DO CASO: Paciente com 32 anos, 60 kg, portadora de esclerose múltipla, tratada com metilprednisolona, deu entrada no centro obstétrico para realização de cesariana. Após monitoração foi realizada anestesia subaracnóidea com bupivacaína a 0,5% hiperbárica (12,5 mg associada à morfina (0,1 mg. O procedimento evoluiu sem intercorrências e a paciente recebeu alta hospitalar 48 horas após o parto sem piora dos sintomas preexistentes. CONCLUSÕES: O presente caso sugere que a raquianestesia pode ser administrada em paciente portador de esclerose múltipla sem a ocorrência obrigatória de exacerbações agudas dos sintomas no período pós-operatório.JUSTIFICATIVA Y OBJETIVOS: La esclerosis múltiple es una enfermedad adquirida que se caracteriza por áreas desmielinizadas en el encéfalo y en la médula espinal. El cuadro clínico depende de las áreas anatómicas acometidas. Las principales causas de muerte son infección, falencia respiratoria y estado de mal epiléptico. Ocurre en pacientes genéticamente predispuestos después del contacto con factores ambientales, principalmente los virus. El objetivo de este relato fue presentar la técnica anestésica adoptada en paciente con esclerosis múltiple sometida a cesárea. RELATO DEL CASO: Paciente con 32 anos, 60 kg, portadora de esclerosis múltiple, tratada con metilprednisolona, entró en el centro obstétrico para realizaci

    8. Study of some properties of bound levels and virtual levels excited with resonance neutrons; Etude de quelques proprietes de niveaux lies et de niveaux virtuels excites a l'aide de neutrons de resonance

      Energy Technology Data Exchange (ETDEWEB)

      Alves, R N [Commissariat a l' Energie Atomique, 91 - Saclay (France). Centre d' Etudes Nucleaires

      1968-05-01

      Many neutron resonance parameters of some nuclei with a spin value I 3/2 ({sup 35}Cl, {sup 37}Cl, {sup 63}Cu, {sup 65}Cu, {sup 197}Au) are determined to find the strength function S{sub 0} with accuracy. For those nuclei, the S{sub 0} value seems not to depend on the spin value J=1 or 2 but could be depend on neutron energy for {sup 197}Au. Total radiative width variation against mass number A and spacing distributions between resonances (for {sup 197}Au) are studied and discussed. Analysis methods of neutron capture experiments are described in detail and level schemes of Cl, Mn, Fe, Co, Cu, Tm, Hg are presented sometimes with the spin value. Intensities of E{sub 1} and M{sub 1} transitions with direct capture and interference effects are discussed in view of experimental results. (author) [French] On determine les parametres des resonances de quelques noyaux de spin I 3/2 ({sup 35}Cl, {sup 37}Cl, {sup 63}Cu, {sup 65}Cu, {sup 197}Au) en nombre suffisant pour obtenir la fonction densite S{sub 0} avec precision. Cette valeur S{sub 0} apparat pour ces noyaux etre independante de la valeur du spin J=1 ou 2 mais para?t, dans le cas de {sup 197}Au, dependre de l'energie. On etudie et on essaie d'interpreter la variation de la largeur radiative totale {gamma}{sub {gamma}} en fonction du nombre de masse A et les distributions des espacements entre resonances pour {sup 197}Au. On expose en detail les methodes d'analyse des experiences de capture et on presente les schemas des niveaux des noyaux: Cl, Mn, Fe, Co, Cu, Tm, Hg. Les intensites des transitions de type E{sub 1} et M{sub 1} ainsi que les effets d'interference et de capture directe sont discutes. (auteur)

    9. Study of some properties of bound levels and virtual levels excited with resonance neutrons; Etude de quelques proprietes de niveaux lies et de niveaux virtuels excites a l'aide de neutrons de resonance

      Energy Technology Data Exchange (ETDEWEB)

      Alves, R.N. [Commissariat a l' Energie Atomique, 91 - Saclay (France). Centre d' Etudes Nucleaires

      1968-05-01

      Many neutron resonance parameters of some nuclei with a spin value I 3/2 ({sup 35}Cl, {sup 37}Cl, {sup 63}Cu, {sup 65}Cu, {sup 197}Au) are determined to find the strength function S{sub 0} with accuracy. For those nuclei, the S{sub 0} value seems not to depend on the spin value J=1 or 2 but could be depend on neutron energy for {sup 197}Au. Total radiative width variation against mass number A and spacing distributions between resonances (for {sup 197}Au) are studied and discussed. Analysis methods of neutron capture experiments are described in detail and level schemes of Cl, Mn, Fe, Co, Cu, Tm, Hg are presented sometimes with the spin value. Intensities of E{sub 1} and M{sub 1} transitions with direct capture and interference effects are discussed in view of experimental results. (author) [French] On determine les parametres des resonances de quelques noyaux de spin I 3/2 ({sup 35}Cl, {sup 37}Cl, {sup 63}Cu, {sup 65}Cu, {sup 197}Au) en nombre suffisant pour obtenir la fonction densite S{sub 0} avec precision. Cette valeur S{sub 0} apparat pour ces noyaux etre independante de la valeur du spin J=1 ou 2 mais para?t, dans le cas de {sup 197}Au, dependre de l'energie. On etudie et on essaie d'interpreter la variation de la largeur radiative totale {gamma}{sub {gamma}} en fonction du nombre de masse A et les distributions des espacements entre resonances pour {sup 197}Au. On expose en detail les methodes d'analyse des experiences de capture et on presente les schemas des niveaux des noyaux: Cl, Mn, Fe, Co, Cu, Tm, Hg. Les intensites des transitions de type E{sub 1} et M{sub 1} ainsi que les effets d'interference et de capture directe sont discutes. (auteur)

    10. The Depths of the Ocean and the Question of Radioactive Waste Disposal in Them; Les Grandes Fosses Oceaniques et l'Immersion des Dechets Radioactifs dans ces Eaux Profondes; 0413 041b 0423 0414 ; Cuestiones Relacionadas con la Inmersion de Desechos Radiactivos en las Grandes Fosas

      Energy Technology Data Exchange (ETDEWEB)

      Bogorov, V. G.; Tareev, B. A.; Fedorov, K. N. [Oceanographical Institute of the Academy of Sciences of the USSR, Moscow, USSR (Russian Federation)

      1960-07-01

      . Aucune d'elles ne possede de particularites morphologiques pouvant empecher les eaux profondes d'y penetrer ou de s'ecouler. L'augmentation progressive de la temperature de l'eau a partir de 3.000 a 5.000 metres de profondeur jusqu'au fond de ces fosses provoque des courants verticaux de convexion dans les eaux profondes. Il est theoriquement prouve que malgre l'effet stabilisateur du mouvement de rotation de la terre, il doit exister des courants de convexion alveolaires, meme lorsque les differences de temperature superadiabatiques restent tres petites. La repartition verticale de la teneur en oxygene en fonction de l'augmentation caracteristique du taux de saturation et de concentration en O{sub 2}, qui va en s'accentuant depuis la couche minimum (1.000 metres) jusqu'au fond, permet de presumer l'existence d'un mouvement horizontal et vertical ou bien d'un deplacement horizontal des eaux profondes dans toute leur masse. S'il n'en etait pas ainsi, l'utilisation biochimique de l'oxygene (au moins 0,1 ml par an) entrainerait un epuisement total des reserves de cet element dans les eaux profondes en un laps de temps relativement court (40 a 60 ans). L'existence de courants horizontaux assez rapides (5 a 17 cm/s) a des profondeurs de 1.000 a 3.000 metres a ete demontree par les mesures directes qui ont ete effectuees dans l'Atlantique et le Pacifique. La diffusion des particules dissoutes ou suspendues dans la mer n'est pas uniquement due a la circulation des eaux, au sens physique de ce terme. Le deplacement continu des organismes vivants constitue, en effet, un risque supplementaire de voir les substances radioactives accumulees dans les tissus de ces organismes etre diffusees par ceux-ci ou transmises par les chaines alimentaires a des distances considerables et a une grande vitesse, comme on a pu le constater apres les explosions experimentales qui ont eu lieu dans l'Ocean Pacifique. Il faut donc admettre qu'il est impossible d'immerger des dechets radioactifs dans les

    11. Spectroscopy of very heavy nuclei with a view to study super-heavy nuclei; Spectroscopie de noyaux tres lourds en vue de l'etude des noyaux super-lourds

      Energy Technology Data Exchange (ETDEWEB)

      Khalfallah, F

      2007-08-15

      Within the recent years, the spectroscopic study of single particle orbitals of very heavy elements (VHE) has become possible with the development of increasingly efficient experimental setups. This allows us, through nuclear deformation, to access with these deformed nuclei to orbitals situated around the Fermi level in the spherical superheavy elements (SHE) and learn more about the nuclear structure of these nuclei. The aim of this work is the spectroscopic studies of heavy and very heavy elements. Because of the experimental difficulties associated with the fusion reactions in the VHE region, a detailed optimization studies is essential. Simulation of energy loss and angular straggling of these nuclei due to the interaction in the target and to neutron's evaporation was carried out and allowed us to optimize the angular acceptance of the separators according to the target thickness. An extensive survey and exploration in the VHE region was also conducted on the basis of cross section's systematics in the literature and simulations carried out using the statistical code Hivap. In this framework, the possible extension of the range of validity of a set of Hivap parameters was investigated. This work has enabled us to prepare a list of experiments of interest for the production of very heavy nuclei. In this thesis, our work was concentrated on the spectroscopy of the nuclei No{sup 256} et Rf{sup 256} for which two experimental proposals were accepted. The octupole deformations predicted in the actinides region is studied in another part of this thesis, a part witch is dedicated to the gamma spectroscopy of Pa{sup 223}. The data from a new experiment carried out using the Jurogam-Ritu-Great setup are analysed and compared to previous results. They confirm the octupole deformed shape in this nucleus. (author)

    12. Medida da espessura do segmento uterino inferior em gestantes com cesárea prévia: análise da reprodutibilidade intra- e interobservador por ultra-sonografia bi- e tridimensional Lower uterine segment thickness measurement in pregnant women with previous caesarean section: intra- and interobserver reliability analysis using bi- and tridimensional ultrasonography

      Directory of Open Access Journals (Sweden)

      Daniela de Abreu Barra

      2008-03-01

      Full Text Available OBJETIVO: comparar a reprodutibilidade intra- e interobservador da medida da espessura total do segmento uterino inferior (SUI, por via abdominal, e da medida da camada muscular, por via vaginal, usando ultra-sonografia bi- e tridimensional. MÉTODOS: foi estudada a medida da espessura do SUI de 30 gestantes com cesárea anterior, entre a 36ª e a 39ª semanas, por dois observadores. Foi efetuada abordagem ultra-sonográfica abdominal com a paciente em posição supina e vaginal em posição de litotomia. No corte sagital, foi identificado SUI e foram coletadas quatro imagens bidimensionais e dois blocos tridimensionais da espessura total por via abdominal e o mesmo da camada muscular por via vaginal. As aquisições tridimensionais foram manipuladas no modo multiplanar. O tempo foi cronometrado. A reprodutibilidade foi avaliada pelo cálculo da diferença absoluta entre todas as medidas, proporção de diferenças menores que 1 mm, coeficiente de correlação intraclasse (ICC e limites de concordância de Bland e Altman. RESULTADOS: a medida da espessura média do SUI por via abdominal bidimensional foi de 7,4 mm e, por via vaginal, de 2,7 mm; a tridimensional foi 6,9 mm abdominal e 5,1 mm vaginal. Reprodutibilidade intra- e interobservador da via vaginal versus abdominal: menor diferença absoluta (0,2-0,4 versus 0,8-1,5 mm, maior proporção de diferenças (85,8-97,8 versus 48,7-72,8% com p0,05 e menores limites de concordância (-3,8 a 3,4 versus -3,6 a 4 mm para ultra-sonografia tridimensional e ICC semelhantes (0,6-0,9 versus 0,7-0,9. CONCLUSÕES: do exposto, concluímos que a medida da espessura da camada muscular do SUI por via vaginal utilizando a ultra-sonogafia tridimensional é mais reprodutível. Nossos resultados, porém, não indicam que essa medida tenha implicação clínica para predição de rotura uterina, que não foi objeto deste estudo. O único trabalho que correlacionou a espessura do SUI com risco de rotura uterina, sem

    13. Cross section measurements of fissile nuclei for slow neutrons; Mesures de sections efficaces de noyaux fissiles pour les neutrons lents

      Energy Technology Data Exchange (ETDEWEB)

      Auclair, J M; Hubert, P; Joly, R; Vendryes, G; Jacrot, B; Netter, F [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires; Galula, M [Centre National de la Recherche Scientifique (CNRS), 91 - Gif-sur-Yvette (France)

      1955-07-01

      It presents the experimental measurements of cross section of fissile nuclei for slow neutrons to improve the understanding of some heavy nuclei of great importance in the study of nuclear reactors. The different experiments are divided in three categories. In the first part, it studied the variation with energy of the cross sections of natural uranium, {sup 233}U, {sup 235}U and {sup 239}Pu. Two measurement techniques are used: the time-of-flight spectrometer and the crystal spectrometer. In a second part, the fission cross sections of {sup 233}U and {sup 239}Pu for thermal neutrons are compared using a neutron flux from EL-2 going through a double fission chamber. The matter quantity contained in each source is measured by counting the {alpha} activity with a solid angle counter. Finally, the average cross section of {sup 236}U for a spectra of neutrons from the reactor is measured by studying the {beta} activity of {sup 237}U formed by the reaction {sup 236}U (n, {gamma}) {sup 237}U in a sample of {sup 236}U irradiated in the Saclay reactor (EL-2). (M.P.)

    14. Universe, stars, nuclei and particles: recent discoveries and new questions; Univers, etoiles, noyaux et particules: decouvertes recentes et nouvelles questions

      Energy Technology Data Exchange (ETDEWEB)

      NONE

      2002-07-01

      The scientific community aims to reduce the apparent complexity of the Universe to some elementary physical laws. Our Universe Physics is described at any observation scale by a theoretical framework called ''standard model''. This document deals with the great questions of the today Physics trough the following standard models: the cosmos standard model, the stars standard model, the atomic nuclei standard model and the elementary particles Physics standard model. (A.L.B)

    15. Investigation of correlations in light neutron-rich nuclei; Etude des correlations dans les noyaux legers riches en neutrons

      Energy Technology Data Exchange (ETDEWEB)

      Normand, G

      2004-10-01

      Correlations play a crucial role in understanding the structure of light nuclei at and beyond the neutron drip-line. In this context, the two-neutron halo nucleus He{sup 6} and the unbound systems H{sup 5}, He{sup 7,9} and Li{sup 10} have been studied via measurements of the breakup of beams of He{sup 6} and Be{sup 11,12}. The CHARISSA and DEMON detector arrays were employed. The interpretation was facilitated by a simulation code (SILLAGE) which provided for the setup. In the case of He{sup 7}, the existence of an excited state with E{sub r} {approx} 1 MeV and gamma {approx} 0.75 MeV was confirmed. The virtual character of the s-wave ground state of Li{sup 10} was also confirmed and a scattering length of as {approx} -16 fm deduced. The results obtained for He{sup 9} suggest that a virtual s-wave state may exist just above threshold. The study of the three-body breakup of He{sup 6} found that the decay of the first 2+ state is essentially direct, while the decay of the remaining continuum strength is sequential - passage via He{sup 5}. Using the technique of intensity interferometry an rms separation between the halo neutrons of 7.7 +- 0.8 fm was derived. This result was confirmed by a complementary method utilizing Dalitz plots. In the case of H{sup 5}, the invariant mass spectrum was found to exhibit a broad (gamma {approx} 2 MeV) structure some 1.8 MeV above threshold. Comparison with recent three-body model calculations suggest that this corresponds to the predicted 1/2+ ground state. An rms valence neutron separation of some 5.5 fm was estimated. A search was also carried out for the 4n system using the Be{sup 12*} (2 alpha + Xn decay channel). No signal was observed beyond that expected on the basis of the known background processes. (author)

    16. Giant resonance and dipolar states of light nuclei; La resonance geante et les etats dipolaires des noyaux legers

      Energy Technology Data Exchange (ETDEWEB)

      Miller, J [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

      1965-07-01

      Cross-section for ({gamma},n) reactions on C{sup 12},, O{sup 10}, Mg{sup 24} and Ca{sup 40} have been measured using 'monochromatic' gamma rays of variable energy obtained from the annihilation in flight of fast positrons. We compare the observed structure with the shell model of nucleus, including residual interaction between nucleons by 'hole particle' techniques. (author) [French] Les photons 'monochromatiques', d'energie variable, produits par l'annihilation en vol de positons, sont utilises pour mesurer la section efficace ({gamma},n) de {sup 12}C, {sup 16}O, {sup 21}Mg et {sup 40}Ca. La structure observee est comparee aux previsions theoriques du modele a particules independantes, tenant compte de l'interaction residuelle entre nucleons par la methode 'trou-particule'. (auteur)

    17. L'état de plasma le feu de l'Univers

      CERN Document Server

      Lehner, Thierry

      2004-01-01

      Dans l'Antiquité, les Grecs considéraient que les constituants du monde dérivaient de quatre éléments essentiels : la terre, l'eau, l'air et le feu. Il n'est pas difficile de voir dans les trois premiers l'équivalent de nos états solide, liquide et gazeux. Mais l'état physique le plus répandu dans l'Univers - correspondant au feu des Anciens - n'est apparu que récemment et n'a été reconnu par la communauté des physiciens qu'en 1928 : c'est le plasma. Cet état très étrange - gazeux, électrique, lumineux, impalpable - reste le plus exotique et le plus inattendu. Il a donné naissance aux trois autres états puisque, à l'exception des éléments ultra-légers que sont l'hydrogène et l'hélium, tous ceux qui constituent notre monde (carbone, oxygène, fer, etc.) sont apparus dans ces fourneaux gigantesques, ces monstres de plasma, qu'étaient les premières étoiles. La vie elle-même en découle par ricochet, ce qui a permis de dire que nous ne sommes que des " poussières d'étoiles ". Décou...

    18. Les enjeux du modèle standard

      CERN Document Server

      CERN. Geneva

      2008-01-01

      Toute la matière visible dans l'Univers est décrite par le « Modèle Standard ». Selon cette théorie, la matière est constituée d'atomes, qui contiennent des électrons orbitant autour de noyaux, dont les composants fondamentaux sont les quarks. Quatre forces fondamentales agissent entre ces particules élémentaires : les forces électromagnétique est gravitationnelle, et les interactions nucléaires forte et faible. La description fournie par le Modèle Standard de ces particules et de leurs interactions est en parfait accord avec les expériences. Néanmoins, des questions fondamentales restent sans réponse jusqu'à maintenant : d'où vient la masse des particules ? Pourquoi y a-t-il tant de types de particules ? Existe-t-il une théorie unifiée de toutes les interactions ? Quelle est la nature de la matière cachée prédite par les astrophysiciens ? Le LHC au CERN donnera des éléments de réponse à ces questions au-delà du Modèle Standard.

    19. Correlação entre a fração inspirada de oxigênio, a pressão parcial de oxigênio materno e a pressão parcial de oxigênio fetal durante parto cesáreo em gestações normais Correlación entre la fracción inspirada de oxígeno, la presión parcial de oxígeno materno y la presión parcial de oxígeno fetal durante el parto por cesárea en embarazos normales Correlation between the inspired fraction of oxygen, maternal partial oxygen pressure, and fetal partial oxygen pressure during cesarean section of normal pregnancies

      Directory of Open Access Journals (Sweden)

      Carlos Henrique Viana de Castro

      2009-08-01

      Full Text Available JUSTIFICATIVA E OBJETIVOS: Apesar das alterações na função pulmonar, a oxigenação materna se mantém nas anestesias regionais para obstetrícia. Mesmo assim, nessas situações, o fornecimento de oxigênio suplementar para a mãe é prática disseminada. A principal justificativa é a boa oxigenação fetal; entretanto, não há devida comprovação. Este estudo prospectivo e com distribuição randômica das pacientes teve o objetivo de testar a hipótese da existência ou não de correlação entre hiperóxia materna e elevação de parâmetros gasométricos fetais na cesariana eletiva. MÉTODO: Foram estudadas vinte pacientes grávidas, submetidas à raquianestesia, através de gasometrias arteriais, com diferentes frações inspiradas de oxigênio e correlacionadas com a gasometria fetal. RESULTADOS: O aumento da fração inspirada de oxigênio materno não se correlacionou com o aumento da pressão parcial de oxigênio fetal. CONCLUSÕES: A indução de hiperóxia materna através de oxigenoterapia suplementar não foi capaz de aumentar a pressão parcial de oxigênio no feto. Não houve modificação nos parâmetros gasométricos fetais, mesmo em caso de mudança desses parâmetros na parturiente, induzidos pela hiperóxia durante a cesariana sob raquianestesia.JUSTIFICATIVA Y OBJETIVOS: A pesar de las alteraciones en la función pulmonar, la oxigenación materna se mantiene en las anestesias regionales para obstetricia. Pero incluso así, en esas situaciones, el suministro de oxígeno suplementario para la madre se practica en forma diseminada. La principal justificación es la buena oxigenación fetal, sin embargo, no existe la debida comprobación al respecto. Este estudio prospectivo y con distribución randómica de las pacientes, tuvo el objetivo de comprobar la hipótesis de la existencia o no de una correlación entre la hiperoxia materna y la elevación de los parámetros gasométricos fetales en la cesárea por elecci

    20. Sacubitril Is Selectively Activated by Carboxylesterase 1 (CES1) in the Liver and the Activation Is Affected by CES1 Genetic Variation

      OpenAIRE

      Shi, Jian; Wang, Xinwen; Nguyen, Jenny; Wu, Audrey H.; Bleske, Barry E.; Zhu, Hao-Jie

      2016-01-01

      Sacubitril was recently approved by the Food and Drug Administration for use in combination with valsartan for the treatment of patients with heart failure with reduced ejection fraction. As a prodrug, sacubitril must be metabolized (hydrolyzed) to its active metabolite sacubitrilat (LBQ657) to exert its intended therapeutic effects. Thus, understanding the determinants of sacubitril activation will lead to the improvement of sacubitril pharmacotherapy. The objective of this study was to iden...

    1. Estudo comparativo entre efedrina e etilefrina como vasopressor para correção da hipotensão arterial materna em cesarianas eletivas com raquianestesia Estudio comparativo entre efedrina y etilefrina como vasopresor para correción de la hipotensión materna en cesáreas electivas con raquianestesia Ephedrine and etilefrine as vasopressor to correct maternal arterial hypotension during elective cesarean section under spinal anesthesia. Comparative study

      Directory of Open Access Journals (Sweden)

      Sérgio D. Belzarena

      2006-06-01

      Full Text Available JUSTIFICATIVA E OBJETIVOS: A efedrina é o vasopressor mais utilizado em obstetrícia e a etilefrina é muito usada em anestesia regional. O objetivo deste estudo foi comparar a efedrina com a etilefrina para correção de hipotensão arterial materna durante raquianestesia para cesariana eletiva. MÉTODO: Foram estudadas 120 gestantes divididas de forma aleatoria em dois grupos iguais. Todas receberam raquianestesia com bupivacaína, fentanil e morfina. Foi medida a pressão arterial não-invasiva e a freqüência cardíaca. Os recém-nascidos foram avaliados com o índice de Apgar. A incidência de hipotensão arterial, a quantidade de vasopressor necessária para correção e os efeitos adversos foram anotados. RESULTADOS: Ocorreu hipotensão arterial materna com freqüência nos dois grupos, sendo 68% do grupo etilefrina e 63% do grupo efedrina. Na maioria das gestantes foi corrigida com a primeira dose do vasopressor, sem diferença entre os grupos (66% etilefrina, 58% efedrina. A hipotensão arterial necessitou de duas ou mais doses de vasopressor para ser corrigida ou houve hipertensão reativa em poucas pacientes (24% e 10% do grupo etilefrina e 34% e 8% do grupo efedrina, respectivamente sem diferença estatística significativa. Não houve diferença nos efeitos adversos e nos testes dos recém-nascidos. CONCLUSÕES: Com o método de administração empregado e com as doses de vasopressor selecionadas não houve diferença entre a efedrina e a etilefrina quando utilizadas para corrigir a hipotensão arterial materna em cesarianas com raquianestesia.JUSTIFICATIVA Y OBJETIVOS: La efedrina es el vasopresor más utilizado en obstetricia y la etilefrina es muy usada en anestesia regional. El objetivo de este estudio fue el de comparar la efedrina con la etilefrina para la corrección de la hipotensión arterial materna durante raquianestesia para cesárea electiva. MÉTODO: Se estudiaron 120 embarazadas divididas aleatoriamente en dos

    2. Efedrina versus fenilefrina: prevenção de hipotensão arterial durante anestesia raquídea para cesariana e efeitos sobre o feto Efedrina versus fenilefrina: prevención de hipotensión arterial durante anestesia raquidea para cesárea y efectos sobre el feto Ephedrine versus phenylephrine: prevention of hypotension during spinal block for cesarean section and effects on the fetus

      Directory of Open Access Journals (Sweden)

      Edno Magalhães

      2009-02-01

      Full Text Available JUSTIFICATIVA E OBJETIVOS: A hipotensão arterial durante a anestesia raquídea para cesariana deve-se ao bloqueio simpático e compressão aorto-cava pelo útero e pode ocasionar efeitos deletérios para o feto e a mãe. A efedrina e fenilefrina melhoram o retorno venoso após bloqueio simpático durante anestesia raquídea. O objetivo deste estudo foi comparar a eficácia da efedrina e da fenilefrina em prevenir e tratar a hipotensão arterial materna durante anestesia raquídea e avaliar seus efeitos colaterais e alterações fetais. MÉTODO: Sessenta pacientes, submetidas à anestesia raquídea com bupivacaína e sufentanil para cesariana, foram divididas aleatoriamente em dois grupos para receber, profilaticamente, efedrina (Grupo E, n = 30, dose = 10 mg ou fenilefrina (Grupo F, n = 30, dose = 80 µg. Hipotensão arterial (pressão arterial menor ou igual a 80% da medida basal foi tratada com bolus de vasoconstritor com 50% da dose inicial. Foram avaliados: incidência de hipotensão arterial, hipertensão arterial reativa, bradicardia e vômitos, escore de Apgar no primeiro e quinto minutos e gasometria do cordão umbilical. RESULTADOS: A dose média de efedrina foi 14,8 ± 3,8 mg e 186,7 ± 52,9 µg de fenilefrina. Os grupos foram semelhantes quanto aos parâmetros demográficos e incidência de vômitos, bradicardia e hipertensão arterial reativa. A incidência de hipotensão arterial foi de 70% no Grupo E e 93% no Grupo F (p JUSTIFICATIVA Y OBJETIVOS: La hipotensión arterial durante la anestesia raquídea para cesárea se debe al bloqueo simpático y a la compresión aortocava por el útero y puede ocasionar efectos malignos para el feto y su madre. La efedrina y fenilefrina mejoran el retorno venoso después del bloqueo simpático durante la anestesia raquídea. El objetivo de este estudio fue comparar la eficacia de la efedrina y de la fenilefrina en prevenir y tratar la hipotensión arterial materna durante la anestesia raquídea y

    3. Studies in Petroleum Composition the Distribution of Nitrogen Species, Metals and Coke Precursors During High Vacuum Distillation of Petroleum Étude de composition du pétrole Répartition des espèces azotées, des métaux et des précurseurs du coke pendant la distillation sous vide poussé du pétrole

      Directory of Open Access Journals (Sweden)

      Long R. B.

      2006-11-01

      tudie cette question et tente de décrire l'influence d'une distillation approfondieà +1289 °F (environ 698 °C sur la composition en produits volatils/non volatils d'un résidu obtenu à + 950 °F (510 °C. A +1289 °F, la distillation concentre dans la fraction obtenue la majorité de l'azote, du nickel, du vanadium et des produits de tête. Cependant, étant donné le niveau élevé de son point de coupe, cette procédure implique virtuellement que certaines molécules contenant des hétéroatomes seront volatiles au point de coupe. Des quantités significatives de ces produits se trouvent dans la fraction 950-1289 °F. Parmi ceux d'entre eux qui contiennent de l'azote, on pourra trouver des benzophénanthrolines et des benzocarbazoles alkylés dont les points d'ébullition se situent dans le domaine 950-1289 °F. Il n'est pas non plus surprenant de trouver dans cette fraction des métaux volatils, puisque les organométalliques se vaporisent vers 1100 °F (environ 593 °C. Les matériaux du domaine A-1289 °F ont donné des rendements élevés en pentane- et heptane- -asphaltènes. Le bilan des poids des asphaltènes sur la base A-950 °F fait apparaître des quantités excessives d'asphaltènes dans le domaine A-1289 °F dépassant la marge d'erreurs permise dans la technique de désalphatage. On a également noté des déséquilibresen asphaltène comparables, lorsque des matières lourdes sont fractionnées par un désalphatage séquentiel utilisant des hydrocarbures différents à chaque étape (13. On peut penser que la technique d'adsorption, comme le désalphatage séquentiel, rompt les forces intermoléculaires qui, autrement, pourraient rendre les constituants de la charge solubles dans les hydrocarbones, du fait de la nature non polaire des participants. Dans le cas présent, on peut penser que les forces intermoléculaires du A-1289 °F sont plus difficiles à rompre par les n-paraffines (ou par le toluène du fait de l'absence relative (par rapport à A-950

    4. Anestesia espinhal com 10 mg de bupivacaína hiperbárica associada a 5 µg de sufentanil para cesariana: estudo de diferentes volumes Anestesia espinal con 10 mg de bupivacaína hiperbárica asociada a 5 µg de sufentanil para cesárea: estudio de diferentes volúmenes Spinal Block with 10 mg of hyperbaric bupivacaine associated with 5 µg of sufentanil for cesarean section: study of different volumes

      Directory of Open Access Journals (Sweden)

      Angélica de Fátima de Assunção Braga

      2010-04-01

      alteraciones fisiológicas inherentes al embarazo, baricidad, dosis y volumen del anestésico local. El objetivo de este estudio fue evaluar la efectividad y los efectos colaterales de diferentes volúmenes de la asociación de bupivacaína hiperbárica y sufentanil por vía subaracnoidea en cesáreas. MÉTODO: Cuarenta pacientes, ASA I y II, sometidos a cesárea electiva bajo raquianestesia distribuidos en dos grupos, de acuerdo con el volumen de la solución anestésica usada: Grupo I (4 mL y Grupo II (3 mL. En los dos grupos, el anestésico local empleado fue la bupivacaína hiperbárica (10 mg-2 mL asociada al sufentanil (5 µg-1 mL. En el Grupo I, para la obtención del volumen de 4 mL, se añadió 1 mL de solución fisiológica a 0,9%. Se evaluaron: latencia del bloqueo; nivel máximo del bloqueo sensitivo; grado del bloqueo motor; tiempo para regresión del bloqueo motor; duración total de la analgesia; efectos adversos maternos y repercusiones neonatales. RESULTADOS: La latencia, el nivel máximo del bloqueo sensitivo, el grado y el tiempo para la regresión del bloqueo motor fueron similares en los dos grupos; la duración de la analgesia fue mayor en el Grupo I, con una diferencia significativa con relación al Grupo II. Los efectos adversos se dieron a menudo de forma similar en los dos grupos. Se registró la ausencia de las alteraciones cardiocirculatorias maternas y de las repercusiones neonatales. CONCLUSIONES: La bupivacaína hiperbárica en dosis de 10 mg asociada al sufentanil en dosis de 5 µg, con un volumen de 4 mL, fue más eficaz que la misma asociación en un menor volumen (3 mL, proporcionando una mejor analgesia intra y postoperatoria, sin repercusiones materno-fetales.BACKGROUND AND OBJECTIVES: Several factors affect the cephalad dispersion of the anesthetic solution in the subarachnoid space; among them, physiological changes of pregnancy and the dose and volume of the local anesthetics should be mentioned. The objective of this study was to assess

    5. Trous noirs et distorsions du temps l'héritage sulfureux d'Einstein

      CERN Document Server

      Thorne, Kip S

      1997-01-01

      Kip S. Thorne a été l'un des acteurs privilégiés d'une quête grandiose, qui a duré près de trente années, pour comprendre l'héritage transmis par Einstein - la théorie de la relativité générale et ses étonnantes prédictions concernant l'univers -, pour découvrir où et comment la relativité échoue, et pour trouver ce qui alors la remplace. Le lecteur est entraîné à travers un labyrinthe d'objets exotiques: trous noirs, naines blanches, étoiles à neutrons, ondes gravitationnelles, trous de ver et machines à voyager dans le temps. Il suit pas à pas l'histoire de ces découvertes scientifiques qui ont toutes été prédites par la théorie de la relativité et à certaines desquelles Einstein lui-même ne croyait pas. L'auteur écrit ainsi la chronique fascinante des efforts qui menèrent à la compréhension des objets peut-être les plus mystérieux de l'univers, en particulier les trous noirs. Jonglant avec les décennies, évoquant la multiplicité des collaborations scientifiques à...

    6. Evidence d'une recombinaison génomique entre deux espèces de ...

      African Journals Online (AJOL)

      13ème colloque de l'ASIC, Paipa,. Colombie. pp. 474-484. Baranski O., 1997. Participation à l'évaluation des ressources génétiques caféières : étude des caractères morphologiques, phénologiques et de la fertilité de 29 taxons de caféiers sauvages africains, situation des taxons indéterminés originaires du Cameroun et ...

    7. Les différentes espèces d’histoire

      OpenAIRE

      Seignobos, Charles

      2014-01-01

      I. Formation de l’histoire. – L’histoire dans l’Antiquité, au Moyen Âge, à la Renaissance. – Les histoires spéciales et l’histoire générale. – Naissance des histoires spéciales, histoire universelle, histoire générale.II. Rapports entre l’histoire et les sciences sociales. – Les sciences sociales en tant que sciences documentaires emploient la critique historique. – Nécessité de l’étude du passé en science sociale. – Divisions de l’histoire sociale. I. – L’histoire est une création des Grecs ...

    8. At CES Paul Allen beaming about Hawks, wishing Bill Gates well

      CERN Multimedia

      2008-01-01

      when word came out that he and Bill Gates were supporting a spectacular new telescope with $30 million in donations. E-mail was apparently a little spotty on the yacht, but he responded last night to a few questions about the LSST project:

    9. Raíces Históricas de la Institución Hospitalaria

      Directory of Open Access Journals (Sweden)

      Alberto Amaris Mora

      1996-04-01

      Full Text Available

      “Es la historia madre de la verdad, émula del tiempo, depósito de las acciones, testigo de lo pasado, ejemplo y aviso de lo presente, advertencia de lo porvenir”.

      Miguel de Cervantes Saavedra

      Introducción

      El vocablo español “HOSPITAL” procede de dos voces latinas que significan cada una “huésped” (bien sea el que hospeda o el que es hospedado: hospes, itis y hospitalis,e.

      Para satisfacer el título enunciado nos propusimos realizar una investigación de carácter bibliográfico e histórico, con el fin de conocer en lo posible, hasta donde lo permitiera la información disponible a nuestro alcance, las facetas que en el manejo de los enfermos y a través de los siglos pueden señalarse como similares, equivalentes o precursoras de cualquiera de las actividades que adelantan los hospitales de nuestros días, algunas de cuyas características principales lo presentan como punto de referencia y sitio de internamiento de los enfermos para su tratamiento, constituyéndose a la vez en columna fundamental del ejercicio de todas las profesiones atinentes a la salud, en especial de la Medicina en cuanto tiene que ver con su preservación, o con su recuperación cuando quiera que se ha perdido, y con la atención de las secuelas o limitaciones funcionales que en no pocas ocasiones quedan tras el ataque patológico.

      Además de las acciones específicas atrás relacionadas, el hospital es elemento insustituible en la enseñanza de la Medicina y otras profesiones de salud, apareándose codo a codo con las universidades, que necesitan más de él que él de ellas, sin que esta afirmación pretenda desconocer el muy importante aporte de la institución docente a la institución hospitalaria.

      El Hospital tiene también las funciones de transmitir, actualizar y generar conocimientos, para lo cual ha de investigar, disponer de buena biblioteca y conexión sistematizada con otros centros del conocimiento, así como mantener una vida científica muy dinámica y atractiva. Toda actividad del hospital debe ser éticamente transparente.

      Dado que el acto médico abarca información, exploración clínica y para clínica, diagnóstico, tratamiento, valoración terminal y pronóstico, nos detendremos cuando creamos encontrar en una determinada circunstancia alguna eventual analogía del pasado con cualquiera de esas etapas del proceso de la actividad sanatorial.

      De ser posible, determinaremos en cada ocasión el tipo de exploración para el diagnóstico, de éste en sí mismo, del tratamiento y del enfoque de la situación post enfermedad. Igualmente, haremos mención de los diferentes personajes que a través de la historia se han ocupado en manejar al hombre enfermo en los procesos de diagnóstico y tratamiento...

    10. Sélection des espèces indicatrices d'oiseaux des galeries ...

      African Journals Online (AJOL)

      Quatrième rapport national du Bénin sur la convention des nations unies sur la diversité biologique. Cotonou, Bénin, 130p. Rija AA, Said A, Mwamende KA, Hassan SN,. Madoffe SS. 2014. Urban sprawl and species movement may decimate natural plant diversity in an Afro-tropical city. Biodiversity & Conservation, 23: 963 ...

    11. Pneumoperitônio pós-cesárea: relato de caso

      OpenAIRE

      Amorim,Melania Maria Ramos de; Spencer Netto,Fernando Antônio Campelo; Santos,Luiz Carlos; Mascarenhas,Everaldo; Katz,Leila

      1998-01-01

      A associação de pneumoperitônio, dor abdominal e íleo paralítico no período pós-operatório relaciona-se, na maioria dos casos, à perfuração de vísceras ocas. Os autores apresentam um caso de pós-operatório de cesariana por DPPNI em que a paciente evoluiu com importante distensão e dor abdominal. Realizada radiografia de tórax e abdome evidenciou-se importante dilatação das alças de intestino grosso e delgado e pneumoperitônio, foi submetida a laparotomia exploradora com a hipótese diagnóstica...

    12. Génétique des abeilles et conservation des espèces

      OpenAIRE

      Zayed , Amro

      2009-01-01

      International audience; The emerging threat of pollinator decline has motivated research on bee conservation biology in order to both understand the causes of declines and to develop appropriate conservation strategies. The application of genetics to the conservation of diploid animals has proven to be important for both overcoming genetic threats to population viability and for providing tools to guide conservation programs. However, the haplodiploid bees have several unusual genetic propert...

    13. Feedback as a means of decreasing residential energy consumption. Report PU/CES 34

      Energy Technology Data Exchange (ETDEWEB)

      Seligman, C; Darley, J M

      1976-08-01

      When residential units are analyzed in human factor terms, it is apparent that the consumption level feedback (typically a bill, calculated once a month, over all appliances) is inadequate to give the resident useful information about his energy consuming actions. The present study tested the hypothesis that providing immediate feedback to homeowners concerning their daily rate of electric usage would be effective in reducing electric consumption. In the studied homes, central air-conditioning is the largest single source of electric power consumption during the summer. Accordingly, it was possible to predict the household's expected electric consumption in terms of the average daily outdoor temperature. Predicted electric consumption was derived from a previous month's modeling period during which a regression line was fitted to predict consumption from average daily temperature, for each home. Feedback was expressed as a percentage of actual consumption over predicted consumption. Feedback was displayed to homeowners four times a week for approximately one month. The results confirmed the prediction. Before feedback began, the feedback and control groups were consuming electricity at approximately equal rates. During the feedback period, the feedback group used 10.5 percent less electricity. The effectiveness of the feedback procedure was explained in terms of its cueing, motivational, and commitment functions.

    14. Children – eXperienCes in hUnGAry

      Directory of Open Access Journals (Sweden)

      Zsuzsanna Kiss

      2016-12-01

      Full Text Available Introduction. the situation of divorced men who live separetely children is difficult in hungary, as well as in many other countries. the effects of divorce on all family members is considerable, therefore, the topic seems worth investigating.Aim. the aim of our study was to examine the situation, difficulties and problems of divorced hungarian fathers who live separately from their children, and their need for professional help.Material and methods. the research was conducted among men of legal age who had undergone divorce for the first time,had at least one child together with their ex-wife, and the divorce had taken place in the last 1 to 5 years. A self-made questionnaire composed of four parts (6 open and 60 closed questions was presented to the participants. the questionnaire wasavailable online between 21/11/2015 and 20/01/2016. 100 fathers who filled in the questionnaire correctly were included inthe study.Results. only 18.0% of the fathers had not noticed any physical, mental or behavioural symptoms after divorce. 49.0% of themnoticed all three types of symptoms. several fathers’ work performance declined. one third (32.0% of the fathers had suchserious symptoms that they decided to consult a medical specialist. 80.0% of the fathers were not satisfied with financial supportoffered to them, 76.0% of them were not satisfied with the social allowances available to them, and 74.0% were not satisfiedwith the psychological and psychiatric support they are offered.Conclusions. Fathers are not prepared to face the divorce. physicians should be increasingly aware that divorce can be thesource of physical symptoms. Fathers feel the lack of financial, social and psychological support, as well as of legal support. theywould like to be involved in the family care of the hungarian health visitors’ network after divorce.

    15. Distribution des espèces de primates au Bénin et ethnozoologie

      African Journals Online (AJOL)

      Dr gatsin

      REFERENCES BIBLIOGRAPHIQUES. Campbell G, Teichroeb J, Paterson JD. 2008. Distribution of diurnal primates species in. Togo and Benin. Folia Primatologica. 79(1): 15-30. Djossou GS. 2003. Détermination de l'aire de répartition de la population de colobe magistrat Colobus vellerosus et statuts de conservation au ...

    16. Évaluation de l'incidence des programmes de transferts en espèces ...

      International Development Research Centre (IDRC) Digital Library (Canada)

      Cette recherche jouit de l'appui du programme Croissance de l'économie et débouchés économiques des femmes (programme CEDEF). Ce programme quinquennal est un partenariat réunissant le Department for International Development du Royaume-Uni, la William and Flora Hewlett Foundation et le CRDI. Axé sur les ...

    17. Les Sapotaceae de Madagascar, deux nouvelles espèces du genre ...

      African Journals Online (AJOL)

      île et sont connus sous un même nom ver- naculaire sur l'ensemble du territoire, nanto. Les nanto sont importants dans la Société malgache et leur valeur culturelle est décrite ici. La circonscription taxinomique de Mimusops est bien définie.

    18. The CES Case Competition: A Valuable Resource for Community-Based Agencies.

      Science.gov (United States)

      Bergeron, Natasha; Welsh, Paul

      2003-01-01

      Illustrates the contribution that the Student Case Competition of the Canadian Evaluation Society can make to agencies with evaluation needs by describing the experience of an addiction and family services program whose gambling addiction treatment program used as the case in the qualifying round of the 1998 competition. (SLD)

    19. Young People in Rural Scotland: Getting Out and Staying On. CES Briefing No. 13.

      Science.gov (United States)

      Jones, Gill; Jamieson, Lynn

      A study of youth out-migration from the Scottish Borders region was based on the 1989 Scottish Young People's Survey--a survey of students during their final compulsory school year (age 16-17)--plus followup interviews in 1995 with 23-year-olds from the rural Borders region. Among those in school in the Borders at age 16, only around one-third…

    20. Cranial Electrotherapy Stimulation (CES) in Soldiers with Insomnia: A Pilot Study

      Science.gov (United States)

      2016-07-28

      Active group had a higher mean (M = 35.56) than the Sham group (M = 33.54). • For supplementary analysis a 2 x 2 chi- squared test was conducted... Latino , n (%) 3 (11% ) Native Hawaiian or other Pacific Islander, n (%) 0 (0%) Asian, n (%) 0 (0%) Other, n (%) 0 (0%) Military Service or

    1. Les espèces médicinales spontanées du Sahara septentrional ...

      African Journals Online (AJOL)

      The spontaneous plants of the Sahara are very feature by their fashion of adaptation individual to the very coercive desert environment to their survival. To short come our spatio-temporal survey of 5 years (2000- 2005), we put in evidence the existence of 5 different geomorphologic zones, in which we inventoried 130 ...

    2. Plan d'action pour la conservation des espèces d'oiseaux inscrites ...

      African Journals Online (AJOL)

      This List includes fifteen species of bird, and at the thirteenth Conference of the Parties in Catania, Sicily in November 2003, an Action Plan for the conservation of these species was adopted, following similar plans on monk seal, marine turtles, cetaceans and marine vegetation. The Action Plan for Birds notes initiatives ...

    3. Measurement of the cosmic positrons' spectrum with the experiment AMS-02 and search for exotic signals; Mesure du spectre de positons cosmiques avec l'experience AMS-02 et recherche de signaux exotiques

      Energy Technology Data Exchange (ETDEWEB)

      Pochon, J

      2005-06-15

      The AMS-02 experiment is a particle detector that will be installed on the international space station (ISS) in 2008 for at least 3 years. The physics motivations are cosmic ray measurements (e-, e+, p, p-bar, {gamma}, He, C,...), antimatter search for Z>2 and gamma ray studies from GeV to TeV. The HEAT experiment has measured positron spectrum up to 30 GeV, and shown a possible distortion around 8 GeV, which can be interpreted as a dark matter signal. The cosmic positrons spectrum measurement needs positron/proton separation close to 10{sup 5}, which will be obtained combining all AMS-02 sub-detectors. A neural network analysis has been developed on test beam data taken in 2002, to estimate the electron/proton rejection for the electromagnetic calorimeter. This technique, based on discriminant variables and which was tuned on data, was used to determine the positron acceptance combining other sub-detectors information. The number of conventional positrons can be estimated and AMS ability to detect cold dark matter signals has been determined. This study was presented for signal from supersymmetric neutralinos and from Kaluza-Klein stable particles. Fluxes are naturally too low to be detected. Signal can be enhanced thanks to local dark matter over-densities which appear naturally in galaxy formation models. A model for those over-densities has been tuned and presented. (author)

    4. P.I.A.F.E project: long distance transport of low energy exotic ions; Projet P.I.A.F.E: transport d`ions exotiques de basse energie sur longue distance

      Energy Technology Data Exchange (ETDEWEB)

      Nibart, V.

      1996-01-17

      The aim of the PIAFE project is the long distance (400 m) transport of a low energy radioactive ion beam from the ILL (Institut Laue Langevin) to the ISN (Institut des Sciences Nucleaires) of Grenoble (France). The production, extraction, ionization and mass separation of ions is performed by the ILL, while the transformation of ions into multicharged ions, their stripping and acceleration is carried out at the ISN. Theoretical and experimental studies for a simple an original guidance solution have shown that such a long transport, even delicate, should not encounter any major difficulty. The main objectives of this thesis is the technical realization of a 18 m section of this transport line. The problem of supports and focalizing elements alignment has been solved together with the other problems such as: the central trajectory deviation due to alignment defects and to the Earth`s magnetic field; the particle losses due to charge exchange with the residual gas and the emittance increase by Coulomb scattering. It has been demonstrated that a 90% transmission can be obtained using a 25 keV energy and a 10{sup -7} mbar vacuum. Experimental measurements using a rubidium ion source have allowed to validate a theoretical model of emittance increase due to the residual gas-ions interactions. The increase of emittance with respect to the pressure has been measured using four residual gases of different mass. (J.S.). 29 refs., 61 figs., 19 tabs., 8 photos., 4 appends.

    5. Nomination et catégorisation des realia exotiques dans les récits de voyage (Afrique noire, de la fin du 18e siècle à 1960) : une approche sémantico-discursive

      OpenAIRE

      Guerin , Olivia

      2011-01-01

      The present study explores how reference is constructed in the discursive genre specifiedas travel narrative. A hallmark of the genre is a common posture towards the production of thetext where enunciator-travellers are placed in an asymmetric context between language and cultureand have to give an account of realia (natural species, artefacts, social practices) which are not systematically lexicalized in their own languages or for which they do not have naming competence. They thus tend to p...

    6. Radioactive beams produced by the ISOL method: development for laser ionization and for surface ionization; Faisceaux exotiques par methode ISOL: developpements pour l'ionisation par laser et l'ionisation de surface

      Energy Technology Data Exchange (ETDEWEB)

      Hosni, Faouzi

      2004-10-01

      The works were carried out in the framework of the research program PARRNe (production of radioactive neutron-rich nuclei). This program aims to determine optimal conditions to produce intense beams of neutron-rich isotopes. This thesis treats multiple technical aspects related to the production of separate radioactive isotopes in line (ISOL). It deals mainly with the development of the target-source unit which is the key element for projects such as SPIRAL-2 or EURISOL.The first part presents the various methods using fission as production mode and compares them: fission induced by thermal neutrons, induced by fast neutrons and photofission. The experiment carried out at CERN validated the interest of the photofission as a promising production mode of radioactive ions. That is why the institute of nuclear physics of Orsay decided to build a linear electron accelerator at the Tandem d'Orsay (ALTO).The second part of this thesis deals with the development of uranium targets. The X-rays diffraction and Scanning Electron Microscopy have been used as analysis techniques. They allowed to determine the chemical and structural characteristics of uranium carbide targets as function of various heating temperatures. After the production, the process of ionization has been studied. Two types of ion source have been worked out: the first one is a surface ion source and the second one is a source based on resonant ionization by laser. These two types of sources will be used for the ALTO project. (author)

    7. Modélisation macroscopique des milieux stratifiés conducteurs

      Science.gov (United States)

      Matagne, E.; Conard, J. Ph.

      1997-11-01

      Many laminated structures are recognised in Electrotechnics : magnetic cores, flat conductors windings, slotted surfaces... These structures exhibit macroscopic properties, as magnetic than electric ones. This paper shows how these characteristics can be obtained by homogenisation. It deals with linear materials but taking into account the effect of eddy currents, as well on the macroscopic magnetic permeability as on the macroscopic electric conductivity, which become then complex numbers. An example of use of the macroscopic properties is provided. On peut identifier en électrotechnique de nombreuses structures stratifiées: noyaux magnétiques, bobinages formés de conducteurs plats, surfaces encochées... Ces structures présentent des propriétés macroscopiques tant magnétiques qu'électriques. Cet article montre comment ces caractéristiques peuvent être obtenues par homogénéisation. Il se limite au cas de matériaux linéaires mais en prenant en compte l'effet des courants de Foucault aussi bien sur la perméabilité magnétique macroscopique que sur la conductivité électrique macroscopique, grandeurs qui deviennent alors des nombres complexes. Un exemple d'utilisation des caractéristiques macroscopiques est fourni.

    8. Experimental validation of calculated capture rate for nucleus involved in fuel cycle; Validation experimentale du calcul du taux de capture des noyaux intervenant dans le cycle du combustible

      Energy Technology Data Exchange (ETDEWEB)

      Benslimane-Bouland, A

      1997-09-01

      The framework of this study was the evaluation of the nuclear data requirements for Actinides and Fission Products applied to current nuclear reactors as well as future applications. This last item includes extended irradiation campaigns, 100 % Mixed Oxide fuel, transmutation or even incineration. The first part of this study presents different types of integral measurements which are available for capture rate measurements, as well as the methods used for reactor core calculation route design and nuclear data library validation. The second section concerns the analysis of three specific irradiation experiments. The results have shown the extent of the current knowledge on nuclear data as well as the associated uncertainties. The third and last section shows both the coherency between all the results, and the statistical method applied for nuclear data library adjustment. A relevant application of this method has demonstrated that only specifically chosen integral experiments can be of use for the validation of nuclear data libraries. The conclusion is reached that even if co-ordinated efforts between reactor and nuclear physicists have made possible a huge improvement in the knowledge of capture cross sections of the main nuclei such as uranium and plutonium, some improvements are currently necessary for the minor actinides (Np, Am and Cm). Both integral and differential measurements are recommended to improve the knowledge of minor actinide cross sections. As far as integral experiments are concerned, a set of criteria to be followed during the experimental conception have been defined in order to both reduce the number of required calculation approximations, and to increase as much as possible the maximum amount of extracted information. (author)

    9. A study of anharmonic al and nonlinear behaviours of vibrations of atomic nuclei; Etude des comportements anharmonioques et non lineaires des vibrations des noyaux atomiques

      Energy Technology Data Exchange (ETDEWEB)

      Volpe, M.C. [Caen Univ., 14 (France)

      1997-12-31

      Double Giant Resonances, vibrational states in which a Giant Resonance is excited on top of another Giant Resonance, have been in the last years the object of many theories and studies. Whereas the measured energies and widths of these states agree with a theoretical predictions, the measured excitation cross sections on the other hand are almost always larger than the calculated ones. The standard theoretical approaches are based both on a harmonic approximation for the collective motion on the nucleus and on its linear response to an external field. In this work the influence of anharmonicities and non-linearities in the external field on the excitation of Double Giant Resonances are studied. First, an oscillator model and an extension of the Lipkin-Meshkow-Glick model are used to study the effects of anharmonicities and non-linearities on the excitation probabilities. The results show that these terms can influence the excitation probability of the second excited state in a significant way. Secondly, these exactly soluble schematic models are used to study some of the approximations made in microscopic calculations based on boson expansion methods and also some aspects on the time-dependent mean field approach. Finally, a microscopic calculation of the Coulomb excitation cross sections of Double Giant Resonances is presented for several nuclei. It is found that, for {sup 208} Pb, the inclusion of anharmonicities and non-linearities and the consideration of many states that play a role in the excitation process give a satisfactory agreement between calculated and observed cross sections. (author). 113 refs.

    10. Individual and collective excitations in the superdeformed nuclei of the 190 mass region; Excitations individuelles et collectives dans les noyaux superdeformes de la region de masse 190

      Energy Technology Data Exchange (ETDEWEB)

      Bouneau, Sandra [Inst. de Physique Nucleaire, Paris-11 Univ., 91 - Orsay (France)

      1997-04-11

      This work aims at the study of different excitation modes, individual and collective, in superdeformed (SD) nuclei in the mass 190 region. The study of {sup 193}Tl and {sup 195,196,197}Bi SD nuclei brought information concerning individual excitation around the proton and neutron SD gaps Z = 80 - 82 and N = 112. Also, the study of the nucleus {sup 196}Pb revealed excited SD states built on collective vibrations. Concerning the isotope {sup 193}Tl, magnetic property analysis has been performed and allowed us to identify the proton intruder orbital {pi}i{sub 13/2} on which the two known SD the bands of the nucleus are build. It was possible to separate experimentally the relative contribution of proton and neutron pairing to the dynamic moment of inertia. Several {gamma} transition of high energy (about 3 MeV) linking SD states to normal deformed states (ND) and three new SD bands have been found in this nucleus. These SD bands have been interpreted in terms of individual excitations of the single proton on different orbitals identified above the proton SD gap Z = 80. An interaction between the states of two excited SD band have been observed and its strength measured. All these results (gyromagnetic factor, the role of nuclear pairing, excitation energy of the SD well, the interaction between two orbitals) represent information of theoretical interest. In each isotope {sup 195-197}Bi, one SD band has been discovered. They have been also interpreted in terms of individual excitation implying the same proton state. The study of this nuclei brought the first experimental proof that the superdeformation phenomenon persists above the shell closure Z = 82. In {sup 196}Pb nucleus a new excited SD band has been discovered. Observations are mentioned suggesting that we have to consider excitations different from those based on individual ones. An interpretation based on vibrational modes can explain both the low energy measured of the excited states in respect with the SD state and the decay of the excited SD bands to the yrast SD band. So, the collective modes should be included in theoretical description of SD nuclei. (author) 103 refs., 134 figs., 32 tabs.

    11. Spectroscopical study of the yrast and yrare structure in far-from-stability nuclei; Etude spectroscopique de la structure yrast et yrare de noyaux loin de la stabilite

      Energy Technology Data Exchange (ETDEWEB)

      Hoellinger Fabien [Institut de Recherches Subatomiques, 23, Rue du Loess, BP 28, 67037 Strasbourg Cedex 2 (France)]|[Universite Louis Pasteur, 67 - Strasbourg (France)

      1999-01-13

      The nuclear structure study of neutron-rich nuclei was realized with the EUROGAM II array in two different experiments. The first study consisted in the analysis of the product of spontaneous fission of {sup 248}Cm. Three neutron-rich cerium isotopes {sup 147,149,151}Ce were analyzed. A level scheme for {sup 151}Ce is presented for the first time. The yrast structure of the three nuclei does not show alternative parity bands as expected in this region of octupole deformations. We studied the rotational structure of the bands and this leads to suggest Nilsson configurations to some of them. The aim of this second experiment was the study of the nuclei {sup 99}Mo, {sup 101}Tc, {sup 103}Ru. The three nuclei are situated on the neutron-rich side of the nuclear chart and are produced as fission fragments of a heavy-ion induced reaction. Some bands are extended to higher spins and some new bands are observed. The structure of the rotational bands is interpreted by means of the Hartree-Fock-Bogolyubov model. A last experiment intended to study the structure of the proton-rich nucleus {sup 223}Pa has been achieved with the JURO+RITU array located at Jyvaeskylae (Finland). In this proton-rich actinide region, the nuclei develop octupole features around Z{approx_equal}88, N{approx_equal}132. The analysis of this experiment leads to the first assignment of gamma transitions to the {sup 223}Pa. (author) 91 refs., 78 figs., 16 tabs.

    12. Selective localization of neptunium-237 in the nuclei of mammalian cells. Localisation selective du neptunium-237 au sein des noyaux des cellules de mammiferes

      Energy Technology Data Exchange (ETDEWEB)

      Galle, P.; Boulahdour, H. (Faculte de Medecine, 94 - Creteil (FR)); Metivier, H. (CEA Centre d' Etudes Nucleaires de Fontenay-aux-Roses, 92 (FR). Inst. de Protection et de Surete Nucleaire)

      1992-01-01

      After injection in the rat of soluble neptunium salt, the distribution of this element was studied at the subcellular level by electron microscopy and electron probe microanalysis. Abnormal structures have been observed by electron microscopy in the nuclei of hepatocytes, and the same structures have also been observed in the nuclei of the proximal tubules cells of the kidney. These structures are formed of clusters of very small and dense particles, several nanometers in diameter. The clusters are localized in the central part of the nuclei and they are separate from nucleoli and heterochromatin. Electron probe X-ray analysis of this cluster have shown that they contain neptunium associated with phosphorus. In the cell containing neptunium inclusions, other non specific lesions are also observed (nuclear pycnosis, mitochondrial depletion).

    13. Theory of symmetry and of exact solution properties for fast rotating nuclei; Theorie de la symetrie et des proprietes de solutions exactes pour les noyaux en rotation rapide

      Energy Technology Data Exchange (ETDEWEB)

      Heydon, B

      1995-07-19

      We propose a study of rotating multi-fermionic systems. The method we developed is based on unitary group theory. The formalism of Gel`fand-Tsetlin is is simplified to binary calculations. With the help of operator of Casimir and physical interpretations using dichotomic symmetries (signature, parity), we show rotating Hamiltonians obey to a new quantum symmetry called P. The study of short range two-body interaction breaking weakly this symmetry, is made by using single j-shell. Nuclear interactions coupling two j-shell are introduced. This study allows us to compare ours results to experimental data for three isotopes of Zirconium. (author). 155 refs.

    14. {gamma} ray spectroscopy of neutron rich nuclei around N=20; Spectroscopie {gamma} des noyaux riches en neutrons autour de N=20

      Energy Technology Data Exchange (ETDEWEB)

      Gelin, M

      2007-09-15

      There is an island of inversion around {sup 32}Mg (12 protons, 20 neutrons) in contradiction with a shell closure N=20. It means a coexistence of spherical and deformed shapes. This work is devoted to the study of {gamma}-ray spectroscopy for nuclei in this region, based on an experiment done at GANIL with a composite secondary beam produced by fragmentation. The originality of the method used here lies in the possibility to study simultaneously several nuclei, and for each of them to explore several reaction channels. The VAMOS spectrometer was used for the identification of the ejectiles. The {gamma}-rays were detected with EXOGAM, a germanium clover array. The detectors used before and after the target allowed for a unique identification and a selection of the reaction channel: inelastic scattering, transfer and fragmentation reaction. In this thesis the following nuclei were studied: {sup 28}Ne, {sup 30-32}Mg {sup 31-34}Al, {sup 33-35}Si, {sup 35}P. New {gamma}-rays have been observed. The {gamma}-ray angular distributions and {gamma}-{gamma} angular correlations have been measured for some transitions. Assignment of spins and parities has been proposed for some states. In particular, in {sup 34}Si, the 3{sup -} assignment is confirmed and a new candidate for the second 0{sup +} has been proposed. In {sup 32}Mg, the state at 2.321 MeV, for which conflicting assignment existed, is deduced from the present data as a 4{sup +}, and a 6{sup +} state is proposed. (author)

    15. Synthèse des noyaux super-lourds : Rôle de l'analyse d'incertitude dans la modélisation

      OpenAIRE

      Lu, Hongliang

      2015-01-01

      The existence of super-heavy elements (SHE) has been predicted by the nuclear shell model. However, thenuclear reaction theory for heavy systems, which is essential for the synthesis of SHE, has not been wellestablished yet. Although we have reached a general agreement on the reaction mechanism, large discrepanciesbetween quantitative predictions still persist because of the presence of the fusion hindrance phenomenon. Thefirst aim of this Ph.D. work is to investigate different models associa...

    16. Etude de noyaux riches en neutrons dans la région du coeur doublement magique de ¹³²Sn

      OpenAIRE

      Gey , Guillaume

      2014-01-01

      Evolution of nuclear structure in the vicinity of the doubly magic nuclei 132Sn will be discussed in this work, through the spectroscopy of 136Sb, 136Sn and 138Sn isotopes. Several Sb and Sn known isotopes beyond the Z=50 and N=82 shell closures will be briefly presented in the first chapter, aswell as some of the problems arising from the current shell model descritpion of nuclei in this region. Reader will also find in the same chapter a brief description of the most important tools needed ...

    17. Anti-symmetrized molecular dynamics: a new insight into the structure of nuclei; La dynamique moleculaire antisymetrisee, une nouvelle facon de comprendre la structure des noyaux

      Energy Technology Data Exchange (ETDEWEB)

      Yoshiko, Kanada-En' yo [High Energy Accelerator Research Organization - KEK, Institute of Particle and Nuclear Studies, Ibaraki (Japan); Masaaki, Kimura [Institute of Physical and Chemical Research - RIKEN, Saitama (Japan); Hisashi, Horiuchi [Kyoto Univ., Dept. of Physics, Graduate School of Science (Japan)

      2003-06-01

      The AMD (anti-symmetrized molecular dynamics) theory for nuclear structure is explained by showing its actual applications. First the formulation of AMD including various refined versions is briefly presented and its characteristics are discussed, putting a stress on its nature as an 'ab initio' theory. Then we demonstrate fruitful applications to various structure problems in stable nuclei, in order to explicitly verify the 'ab initio' nature of AMD, especially the ability to describe both mean-field-type structure and cluster structure. Finally, we show the results of applications of AMD to unstable nuclei, from which we see that AMD is powerful in elucidating and understanding various types of nuclear structure of unstable nuclei. (authors)

    18. High-resolution nuclear magnetic resonance of quadrupolar nuclei in solids; Resonance magnetique nucleaire haute-resolution des noyaux quadrupolaires dans les solides

      Energy Technology Data Exchange (ETDEWEB)

      Charpentier, Th

      1998-10-23

      After a brief review of existing methods in high-resolution NMR of quadrupolar nuclei, the manipulation of multi-quantum coherencies by radiofrequency pulses is studied. Results are then applied to the determination of optimal conditions for performing the recently introduced multiple-quantum magic-angle experiment (MQMAS). The principles of this new method, the different pulse sequences and the data processing are described in detail. Applications on aluminum hydrates and cement pastes show the improvements of this new technique over the previous ones. In a second part, after an investigation of the Floquet theory, a new formalism has been devised for studying the behavior of a spin submitted to a strong quadrupolar interaction and radiofrequency field in a rotating sample. This formalism is then applied to a quantitative study of the phenomenon of rotational induced adiabatic transfer of coherencies (RIACT). The extension of our theoretical approach to two-dimensional experiments provides a powerful tool for quantitative analyses of MQMAS spectra. Agreement between experimental data and simulations demonstrates the reliability of our approach. Preliminary results concerning the application of MQMAS spectroscopy, using our simulation programs, to structural study of amorphous materials are presented. The third and last part presents a theoretical and experimental investigation of dipolar order in a rotating sample. Two theoretical models are described, the first for the slow spinning speed regime where an adiabatic approximation can be made, and the second for the fast spinning speed regime. (author)

    19. Study of neutron deficient iridium isotopes by using laser spectroscopy; Etude des noyaux d'iridium deficients en neutrons par spectroscopie laser

      Energy Technology Data Exchange (ETDEWEB)

      Verney, D

      2000-12-19

      Resonance ionization spectroscopy was performed on neutron deficient iridium isotopes {sup 182-189}Ir, {sup 186}Ir{sup m} and stable isotopes {sup 191,193}Ir. Hyperfine spectra were recorded from the optical transition at 351,7 nm between the 5d{sup 7}6s{sup 2} {sup 4}F{sub 9/2} ground state and the 5d{sup 7}6s6p {sup 6}F{sub 11/2} excited state. Radioactive iridium isotopes were obtained from {beta}{sup +}/EC decay of radioactive mercury nuclei deposited on a graphite substrate. The radioactive mercury nuclei were produced at the ISOLDE facility at CERN through spallation reactions, by bombarding a molten lead target with the 1 GeV proton beam delivered by the PS-Booster. Magnetic dipole moments and spectroscopic quadrupole moments were extracted from the hyperfine spectra. The mean square charge radius variations, as deduced from the measured isotopic shift, show a sharp change between {sup 187}Ir and {sup 186}Ir{sup g}, accompanied by a sudden increase in deformation: from {beta}2 {approx} 0,16 to {beta}2 > 0, 2. These results were analysed in the framework of an axial rotor plus one or two quasiparticles. The wave functions of the osmium and platinum cores which are used in order to describe the iridium nuclei were calculated from the HF+BCS method with the Skyrme SIII effective interaction. The cores were constrained to take the deformation parameters extracted from the isotopic shift measurements. One shows then that this sudden deformation change corresponds also to a change in the proton state that describes the odd nuclei ground state or that participates in the coupling with the neutron in odd-odd nuclei. This state is identified with the {pi}3/2{sup +}[402] orbital for the smaller deformations nuclei and with the {pi}1/2{sup -}[541] orbital stemming from the h{sub 9/2} subshell for bigger deformations nuclei. (author)

    20. Nuclei and models, 2001-2003. DEA fields, particles and matter; Noyaux et modeles, 2001-2003. DEA champs, particules, matieres

      Energy Technology Data Exchange (ETDEWEB)

      Sida, J.L

      2003-07-01

      This document gathers a series of 6 lessons dedicated to students in the first year of their thesis (DEA) in fields and particles physics: 1) the extent of nuclear physics, 2) the nucleus as a cluster of interacting fermions, 3) models and deformation, 4) nuclei and rotation, 5) isospin and exotic nuclei, and 6) fission reactions from the saddle point to the scission point.

    1. Study of the isomer nuclei produced in the spontaneous fission of {sup 252}Cf; Etude des noyaux isomeriques produits dans la fission spontanee de {sup 252}Cf

      Energy Technology Data Exchange (ETDEWEB)

      Gautherin, C.; Houry, M.; Korten, W.; Le Coz, Y.; Lucas, R.; Thiesen, Ch. [Dept. d`Astrophysique, de la Physique des Particules, de la Physique Nucleaire et de l`Instrumentation Associee, CEA Centre d`Etudes de Saclay, 91 - Gif-sur-Yvette (France); Badimon, C.; Barreau, G.; Doan, T.P.; Pedemay, G. [Centre d`Etudes Nucleaires, Bordeaux-1 Univ., 33 Gradignan (France); Belier, G.; Girod, M.; Meot, M.V. [CEA Centre d`Etudes de Bruyeres-le-Chatel, 91 (France); Astier, G.; Meot, V.; Peru, S. [CEA Centre d`Etudes de Bruyeres-le-Chatel, 91 (France); Astier, A.; Ducroux, L.; Meyer, M.; Redon, N. [Inst.de Physique Nucleaire, Lyon-1 Univ., 69 - Villeurbanne (France)

      1997-06-01

      Isomeric states have been studied in fission fragments produced by spontaneous fission of {sup 252}Cf. 34 isomeric nuclei have been identified by using coincidences between {gamma}-rays detected in EUROGAM II and fission fragments detected in photovoltaic cells. Lifetimes from 20 ns up to 2 {mu}s have been measured. Microscopic interpretation of the isomeric levels discovered has been tried by means of the Hartree-Fock-Bogolyubov procedure using Gogny force. It was found that the {sup 152,154,156}Nd nuclei have prolate deformation in their ground state; the rotational band built on this ground state is well reproduced by the calculation. For these nuclei the 2 quasi-particle excited states energies are above 1 MeV in agreement with the experiment. The computation confirms the similitude of the {sup 156}Nd and {sup 158}Sm isomeric states associated to neutron 2 quasi-particles of J{sup {pi}} K{sup {pi}} = 5{sup -} ({nu} 5/2 (642) x {nu} 5/2 (523)) while such similitude does not occur for the isotone nuclei {sup 154}Nd and {sup 156}Sm. The computation predicts a proton 2 quasi-particle excited states of J{sup {pi}} = 5{sup -}, near the isomeric level measured in {sup 156}Sm but not for that of {sup 154}Nd. Concerning the {sup 152}Nd the calculated level density is very near that of the states measured in the 1.6 to 2.3 MeV interval. However, the lack of precise information on spins and parities of the measured levels does make not possible a confrontation with the calculations. An up-graded equipment implying 32 photovoltaic cells instead of 2 cells is to be developed and installed by the EUROGAM 3 refs.

    2. Contribution to the study of light nuclei with polarized deuterons; Contribution a l'etude des noyaux legers au moyen de deutons polarises

      Energy Technology Data Exchange (ETDEWEB)

      Arvieux, J [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

      1967-04-15

      We describe roughly the vector and tensor-polarized deuteron source associated with the Saclay fixed energy (22 MeV) cyclotron. This has been used to measure the deuteron asymmetry in d-{alpha} scattering (between 17.7 and 21.4 MeV) and in d-p scattering at 21.7 MeV. Then we develop the formalism of irreducible tensor operators used to describe the polarization of a particle of given spin and we study the helicity formalism used to describe the scattering amplitudes for scattering of deuterons by {alpha} (spin 0) and protons (spin 1/2). We apply the preceding results to the phase shift analysis of scattering cross-sections and: 1) deuteron polarization in d-{alpha} scattering from 10 to 27 MeV from which we obtain indications about the excited states of {sup 6}Li; 2) proton and deuteron polarizations in p-d (or d-p) scattering from 1.5 to 12 MeV so as to get the splitting (due to spin interactions) of P and D waves. (author) [French] On decrit sommairement la source de deutons polarises vectoriellement et tensoriellement associee au cyclotron a energie fixe de Saclay avec laquelle on a mesure l'asymetrie des deutons dans la diffusion d-{alpha} de 17,7 a 21,4 MeV et d-p a 21,7 MeV. Puis or developpe le formalisme des operateurs tensoriels irreductibles utilise pour decrire la polarisation d'une particule de spin quelconque. On etudie ensuite le formalisme de l'helicite dans lequel on etudie la diffusion elastique des deutons diffuses par des particules {alpha} (spin 0) et des protons (spin 1/2). On applique les resultats precedents a l'analyse en dephasages de la section efficace et des polarisations: 1 )des deutons dont la diffusion d-{alpha} de 10 a 27 MeV destinee a donner des indications sur les niveaux excites de {sup 6}Li; 2) des protons et des deutons dans la diffusion p-d de 1,5 a 12 MeV en vue de l'etude de la separation suivant les differentes valeurs du moment total J, des ondes P et D (separation due aux interactions de spin). (auteur)

    3. Neonatal Malaria in the Gambia

      African Journals Online (AJOL)

      Uche

      Inclusion Criteria. All consecutive ... these, 105 (26.5%) satisfied the inclusion criteria ..... Bulletin de la Societe de Pathologie Exotique 1991; ... Revista do Hospital das Clinicas; Faculdade de. Medicina Da Universidade de Sao Paulo. 1993 ...

    4. Construction of an apparatus for nuclear orientation measurements at low temperatures. Application to neodymium-cobalt alloy; Realisation d'un appareil pour des mesures d'orientation nucleaire a basse temperature. Application a l'alliage neodyme-cobalt

      Energy Technology Data Exchange (ETDEWEB)

      Mayer, E [Commissariat a l' Energie Atomique, Grenoble (France). Centre d' Etudes Nucleaires

      1965-10-01

      We describe experiments along which has been studied the anisotropy of {gamma} radiations emitted by oriented nuclei. We have used the great hyperfine fields acting on nuclei in ferromagnetic metals so as to produce alignment at low temperature. By irradiation we obtained a few cobalt 60 nuclei in our samples which were then cooled down to 0,01 K. The anisotropic rate of the 1,33 MeV {gamma} radiation was measured in function of the sample temperature, using as thermometer the anisotropy of {gamma} radiation emitted by cobalt 60 nuclei in a cobalt single crystal. Cobalt 60 was lined up in a cobalt nickel alloy (40% Ni). The hyperfine field at the cobalt was measured compared to the effective field in metallic cobalt: Heff(Co Ni)/Heff(Co metal) = 0.71 {+-} 0.12. These results are in good agreement with specific heat measurements made previously. Cobalt 60 has been polarised in a neodymium-cobalt alloy (NdCo{sub 5}). The field at the cobalt in NdCo{sub 5} has been measured compared to the field in metallic cobalt and taking the non-saturation into account we found 165000 oersteds < Heff(NdCo{sub 5}) < 220000 oersteds. (author) [French] Nous decrivons des experiences au cours desquelles nous avons etudie l'anisotropie de rayonnements {gamma} emis par des noyaux orientes. Nous avons utilise les grands champs hyperfins agissant sur las noyaux dans les metaux ferromagnetiques pour produire l'alignement a basse temperature. Par irradiation nous avons obtenu quelques noyaux de cobalt 60 dans nos echantillons qui furent ensuite refroidis a 0,01 K. Le degre d'anisotropie du rayonnement {gamma} de 1,33 MeV fut mesure en fonction de la temperature de l'echantillon en utilisant l'anisotropie du rayonnement {gamma} de noyaux de cobalt 60 dans un monocristal de cobalt metallique utilise comme thermometre. Le cobalt 60 a ete aligne dans un alliage de cobalt-nickel (40% Ni). Le champ hyperfin au niveau du cobalt a ete mesure par rapport au champ effectif dans le cobalt metallique

    5. Avaliação do estado ácido-básico materno com o uso de sufentanil por via subaracnóidea em diferentes doses para cesarianas e suas repercussões sobre os recém-nascidos Evaluación del estado ácido-básico materno con el uso de sufentanil por vía subaracnóidea en diferentes dosis para cesáreas y sus repercusiones sobre los recién nacidos Evaluation of maternal acid-base status after different doses of spinal sufentanil for cesarean section and its effects on the neonates

      Directory of Open Access Journals (Sweden)

      Luís Fernando Lima Castro

      2003-02-01

      efecto colateral más grave la depresión respiratoria. Se objetivó en este estudio evaluar el estado ácido-básico materno con el uso de sufentanil subaracnóideo en diferentes dosis, asociado a la bupivacaína hiperbárica, para cesáreas y sus repercusiones sobre los recién nacidos. MÉTODO: Fueron evaluadas 40 gestantes a término, estado físico ASA I , con edades entre 17 y 35 años, sometidas a cesárea electiva bajo raquianestesia y divididas en 2 grupos equitativos: en el grupo I recibieron 12 mg de bupivacaína a 0,5% hiperbárica asociados a 2,5 µg de sufentanil y en el grupo II recibieron 12 mg de bupivacaína a 0,5% hiperbárica asociados a 5 µg de sufentanil. Fueron evaluados: estado ácido-básico materno a través de gasometria arterial antes de la realización de la anestesia y después del nacimiento del concepto, SpO2, alteraciones hemodinámicas, vitalidad de los recién nacidos a través del índice de Apgar y gasometria del cordón umbilical y presencia de efectos colaterales. RESULTADOS: Los grupos se mostraron homogéneos en los parámetros evaluados, observándose discreta acidosis metabólica materna compensada en ambos grupos tanto antes de la realización de la anestesia como luego después del nacimiento del concepto, no obstante, sin repercusiones clínicas. Los recién nacidos presentaron buena vitalidad y gasometrias compatibles con la normalidad. CONCLUSIONES: La asociación de bupivacaína hiperbárica en pequeñas dosis de sufentanil subaracnóideo en cesáreas mostró que es la técnica segura al binomio materno-fetal, preservando su estado hemodinámico y ácido-básico.BACKGROUND AND OBJECTIVES: Spinal sufentanil in obstetric anesthesia promotes immediate pain relief, improves anesthesia quality and prolongs postoperative analgesia, its major side effect being respiratory depression. This study aimed at evaluating maternal acid-base status after different doses of spinal sufentanil associated to hyperbaric bupivacaine for

    6. Study and industrial applications of the external slowing-down {beta}{sup -} radiation of the yttrium - 90; Etude et applications industrielles du rayonnement de freinage externe des {beta}{sup -} de l'yttrium - 90

      Energy Technology Data Exchange (ETDEWEB)

      Leveque, P; Martinelli, P; Chauvin, R [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

      1955-07-01

      Inelastic scattering of the {beta}{sup -} particles on the nucleus gives place to the emission of a X-ray Bremsstrahlung radiation. In view of possible industrial applications, we studied the slowing-down radiation of {sup 90}(Sr + Y) sources in various materials. This pure {beta}{sup -} emitter of long period is in the fission products of uranium. Among of the industrial applications, these sources of weak X-rays energy can be used for the radiography of thin pieces, for measuring the thickness, or for the analysis by fluorescence. (M.B.) [French] La diffusion inelastique des particules {beta}{sup -} sur les noyaux donne lieu a l'emission d'un rayonnement X de freinage. En vue de possibles applications industrielles, nous avons etudie le rayonnement de freinage des sources {sup 90}(Sr + Y) dans divers materiaux. Cet emetteur {beta}{sup -} pur a longue periode se trouve dans les produits de fission de l'uranium. Parmi les applications industrielles a l'etude, ces sources de rayons X de faible energie peuvent etre utilisees pour la radiographie de pieces minces, la mesure d'epaisseurs, ou encore pour l'analyse par fluorescence. (M.B.)

    7. Contribution to the Study of Nuclear Magnetic Resonance in Ferromagnets; Contribution a l'etude de la resonance nucleaire dans les corps ferromagnetiques

      Energy Technology Data Exchange (ETDEWEB)

      Robert, C. [Commissariat a l' Energie Atomique, Centre d' Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France)

      1962-07-01

      Properties of nuclear magnetic resonance in the field acting on the nucleus in a ferromagnet were studied. Nuclei were {sup 57}Fe in iron and yttrium iron garnet. Static properties of resonance (frequency, line-width, dipolar structure) were investigated and compared with magnetic behavior and magnetic structure of the materials. Relaxation in garnet points out importance of long range fluctuations induced by impurities in a ferromagnetic lattice. (author) [French] Nous avons etudie les proprietes de la resonance nucleaire dans le champ existant a remplacement d'un noyau dans un corps ferromagnetique (champ local). Les noyaux etaient ceux de {sup 57}Fe dans le fer et dans le grenat d'yttrium et de fer. Les proprietes statiques de la resonance (frequence de resonance, largeur de la raie, structures dues a l'interaction dipolaire) ont ete etudiees et reliees aux caracteristiques magnetiques et a la structure de ces corps. La relaxation dans le grenat a mis en evidence les fluctuations a longue distance induites par des impuretes dans un reseau ferromagnetique. (auteur)

    8. Contribution to the Study of Nuclear Magnetic Resonance in Ferromagnets; Contribution a l'etude de la resonance nucleaire dans les corps ferromagnetiques

      Energy Technology Data Exchange (ETDEWEB)

      Robert, C [Commissariat a l' Energie Atomique, Centre d' Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France)

      1962-07-01

      Properties of nuclear magnetic resonance in the field acting on the nucleus in a ferromagnet were studied. Nuclei were {sup 57}Fe in iron and yttrium iron garnet. Static properties of resonance (frequency, line-width, dipolar structure) were investigated and compared with magnetic behavior and magnetic structure of the materials. Relaxation in garnet points out importance of long range fluctuations induced by impurities in a ferromagnetic lattice. (author) [French] Nous avons etudie les proprietes de la resonance nucleaire dans le champ existant a remplacement d'un noyau dans un corps ferromagnetique (champ local). Les noyaux etaient ceux de {sup 57}Fe dans le fer et dans le grenat d'yttrium et de fer. Les proprietes statiques de la resonance (frequence de resonance, largeur de la raie, structures dues a l'interaction dipolaire) ont ete etudiees et reliees aux caracteristiques magnetiques et a la structure de ces corps. La relaxation dans le grenat a mis en evidence les fluctuations a longue distance induites par des impuretes dans un reseau ferromagnetique. (auteur)

    9. Ropivacaína, articaína ou combinação de ropivacaína e articaína em anestesia peridural para cesariana: estudo randomizado, prospectivo e duplo-cego Ropivacaína, articaína o la combinación de ropivacaína y articaína en la anestesia epidural para cesárea: estudio aleatorio, prospectivo y doble ciego Ropivacaine, articaine or combination of ropivacaine and articaine for epidural anesthesia in cesarean section: a randomized, prospective, double-blinded study

      Directory of Open Access Journals (Sweden)

      Derya Arslan Yurtlu

      2013-02-01

      Full Text Available JUSTIFICATIVA E OBJETIVOS: Iniciar a anestesia peridural com anestésicos locais de longa duração consome uma quantidade significativa de tempo, o que pode ser problemático em centros de anestesia obstétrica muito movimentados. Aventamos a hipótese de que uma combinação de articaína e ropivacaína proporcionaria início mais rápido e mesmo uma recuperação precoce das características do bloqueio sensório-motor. MÉTODOS: Sessenta parturientes a termo agendadas para cesariana eletiva foram randomicamente alocadas em três grupos para receber 20 mL de articaína a 2% (Grupo A, 10 mL de articaína a 2% + 10 mL de ropivacaína a 0,75% (Grupo AR ou 20 mL de ropivacaína a 0,75% (Grupo R via cateter peridural. O tempo de início do bloqueio sensorial até T10-T6 e o nível máximo de bloqueio, o tempo para a regressão de dois segmentos do nível máximo de bloqueio sensorial e o tempo de início e duração do bloqueio motor foram todos registrados. A necessidade de analgésicos adicionais, intra- e pós-operatoriamente, também foi registrada. RESULTADOS: Os dados demográficos foram semelhantes. Os tempos de início do bloqueio sensorial até os níveis T10 e T6 foram significativamente menores nos grupos A e AR, em comparação com o Grupo R (p JUSTIFICATIVA Y OBJETIVOS: Iniciar la anestesia epidural con anestésicos locales de larga duración consume una cantidad significativa de tiempo, siendo un problema en los centros de anestesia obstétrica que tienen mucho movimiento. Barajamos la hipótesis de que una combinación de articaína y ropivacaína proporcionaría un inicio más rápido e incluso una rápida recuperación de las características del bloqueo sensitivo motor. MÉTODOS: Sesenta parturientes a término que tenían cita para la cesárea electiva se ubicaron aleatoriamente en tres grupos para recibir 20 mL de articaína al 2% (Grupo A, 10 mL de articaína al 2% + 10 mL de ropivacaína al 0,75% (Grupo AR o 20 mL de ropivaca

    10. Designing electronic equipment on the basis of standard mechanical structures using internet re­sour­ces

      Directory of Open Access Journals (Sweden)

      Karlangach A. P.

      2016-12-01

      Full Text Available The author proposes a method to design electronic equipment based on functional-node design method that involves the use of 2D- and 3D- models mechanical structures for electronic equipment as a way to reduce development time and errors when creating design documentation for electronic equipment. At present, most areas of science and technology are computerized, more problems in designing electronic equipment are dealt with using computer-aided design (CAD and Computer-aided manufacturing (CAM to reduce the time required for development and manufacturing of electronic equipment. Development of design documentation also requires a more effective approach, because the less the time for development of the design documentation is, the faster the developed device will go into production. The aim of the study is to develop a method of designing electronic equipment using 2D and 3D models of standard mechanical structures for electronic equipment using Internet resources. Based on the presented methods is an example of designing a device from standard bearing structures. Compared with traditional technology, the method of designing electronic equipment using standard parts has the following advantages: - reduces time and improves quality of development through the use of existing design documentation; - accelerates the implementation and introducing into production processes; - increases unification of design solutions.

    11. Score de Gleason des biopsies prostatiques et celui des pièces de prostatectomies: Quelle corrélation?

      Directory of Open Access Journals (Sweden)

      A. Qarro

      2012-12-01

      Conclusion: Le score de Gleason biopsique influence la décision thérapeutique dans le cancer de prostate localisé. Cependant, il ne reflète pas toujours le score de Gleason de la pièce de prostatectomie, en particulier dans les groupes bien différenciés.

    12. Disponibilité des espèces végétales spontanées à usage ...

      African Journals Online (AJOL)

      SARAH

      30 avr. 2014 ... ... application of results: This study suggests that the development of the reserve activities ..... (Balanophoraceae) Root Extract Against ... Evaluation of the Antibacterial Activity of 14 ... screening phytochimique de Caesalpinia.

    13. Efficient overproduction of membrane proteins in Lactococcus lactis requires the cell envelope stress sensor/regulator couple CesSR

      NARCIS (Netherlands)

      Pinto, Joao P C; Kuipers, Oscar P; Marreddy, Ravi K R; Poolman, Bert; Kok, Jan

      2011-01-01

      BACKGROUND: Membrane proteins comprise an important class of molecules whose study is largely frustrated by several intrinsic constraints, such as their hydrophobicity and added requirements for correct folding. Additionally, the complexity of the cellular mechanisms that are required to insert

    14. « Ces animaux qu’on appelle hommes ». Animalité et monstruosité chez Cyrano et Foigny

      Directory of Open Access Journals (Sweden)

      Alex Bellemare

      2015-12-01

      Full Text Available Au dix-septième siècle, la querelle de la « nouvelle philosophie », qui oppose Descartes à Gassendi, repose notamment sur la question, polémique, de la différenciation entre l’homme et l’animal. En effet, toute définition de l’animal engage aussi et parallèlement une réflexion sur l’homme. Les répercussions de ce débat philosophique s’observent dans la littérature viatique au sens large, mais plus particulièrement dans sa variante libertine et antichrétienne. En misant sur l’indécision formelle du genre viatique, qui oscille entre fiction romanesque et réalité testimoniale, les récits de voyage libertins tirent philosophiquement profit du principe relativiste que le genre impose par définition. Or, la médiation de l’inconnu par le connu se manifeste de manière encore plus brutale lorsque le voyage s’effectue dans l’ailleurs utopique. De la même façon que le récit de voyage met à distance la culture du voyageur entrant en contact avec celle de l’autre, le discours sur l’animal reflète également le discours sur soi. Dans l’Autre monde (1657 de Cyrano de Bergerac et la Terre australe connue (1676 de Gabriel de Foigny, deux romans hybrides qui mêlent récits de voyage et discours utopique, la frontière qui sépare ontologiquement l’homme de la bête s’atténue et se trouble. En souterrain, toute une anthropologie libertine s’esquisse chez Cyrano et Foigny, qui correspond à une expression singulière du « moi ».

    15. Raíces medievales del nacional catolicismo: el Poema de Fernán González

      Directory of Open Access Journals (Sweden)

      Moreno Hernández, Carlos

      2000-06-01

      Full Text Available The Poema de Fernán González, a clerical poem written in the second half of the XIIIth century, includes already the national catholic ideology governing Spain up to the present, a religious fundamentalism that christians in the castilian kingdom did oppose to the one by their muslim enemies, always permeating the stories about this half legendary nobleman and exemplifying the blurring borders between history and literature before the XlXth century.[fr] Le Poema de Fernán González, poème de clérecie redige pendant la seconde moitié du XIIème siècle, resume déjà l'idéologie du national catolicisme qui va s'imposer en Espagne jusqu'à nos jours. Il s'agit d'un fondamentalisme religieux que les chrétiens du royaume castillan finirent par opposser à celui de ses énemis musulmans et qu'on peut trouver aussi dans tous les récits ultérieurs sur le comte, exemples des frontières peu claires entre les domaines historique et littéraire jusqu'au XIXème siècle.

    16. Ph.D. Researchers in a Changing World: A Self-Critical Reflection of the CES Conference 2017

      Directory of Open Access Journals (Sweden)

      Alexander James Darracott

      2017-10-01

      Full Text Available The theme of this year’s Centre for Education Studies Interdisciplinary Postgraduate Conference, now in its fifth year, is 'Education in a Changing World'. I attended the conference as a paper presenter and a conference attendee. My personal goals were to develop confidence as an oral presenter, seek professional development opportunities, and engage critically and reflectively with my work and the work of others.  My relativist epistemological beliefs define knowledge as uncertain, context-bound, fallible, defeasible and therefore changeable, and are compatible with my personal goals. Both the goals and beliefs led to the adoption of knowledge co-constructor, communicator, and analyst roles.  Beliefs, goals and adopted roles led to the identification of points of fallibility in my own knowledge and understanding of the phenomenon of interest. Therefore, I formed a perspective of conferences as enabling and facilitating knowledge construction between presenter and audience. Being reflective, critical, adaptable, creative, intuitive, flexible, and open minded are key attitudinal attributes of postgraduates, leading to positive conference experiences and increased self-awareness of own emerging identity as a social scientist. Increasing self-awareness of own identity is important for graduates, as on a broader scale this assists in keeping pace with an ever-changing world.

    17. La psicología de la educación en Argentina: raíces, desarrollos y perspectivas

      OpenAIRE

      Roselli, Nestor Daniel

      2017-01-01

      La Psicología de la Educación en Argentina tiene algunos rasgos evolutivos y estructurales comunes a otros países latinoamericanos y europeos, pero otras características son sin duda propias, determinadas por factores históricos particulares. La psicología emerge como disciplina autónoma de la mano del amplio movimiento positivista que dominó el pensamiento occidental en la segunda mitad del siglo XIX. En Argentina el positivismo impregnó no sólo a la psicología, sino también a la pedagogía. ...

    18. Utilisation des espèces spontanées dans trois villages contigus du Sud du Burkina Faso

      Directory of Open Access Journals (Sweden)

      Guigma, Y.

      2012-01-01

      Full Text Available Use of Wild Plants Species in Three Adjoining Village Southern Burkina Faso. Wild species are very important for people in developing countries. To enrich the knowledge of useful wild species, series of ethnobotanical surveys was conducted in three adjoining villages of southern Burkina Faso. This survey has permitted to identify 147 species distributed in 117 genera and 52 families. Woody species represent 60% and grass 40%. Fifty percent of the species used belong to seven families: Poaceae, Caesalpiniaceae, Combretaceae, Mimosaceae, Rubiaceae, Fabaceae and Anacardiaceae. Ninety-seven species are used in medicines, 47 for crafts, 46 for cattle feeding, 40 for human nutrition and 21 to provide fire. In all plants use categories, the calculation of index values showed that there are species that are used more than others. Thus, Sarcocephalus latifolius is the species most commonly used in medicines, Parkia biglobosa in human nutrition, Afzelia africana in cattle feeding, Vitellaria paradoxa in crafts and Detarium microcarpum in wood fuel. The evaluation of the diversity of use revealed that wood species have high diversity of uses than herbaceous. V. paradoxa is the species most diversely used. The top five most used species are V. paradoxa, P. biglobosa, Khaya senegalensis, Tamarindus indica and A. africana. The results of this study provide a database to assess the availability and the evolutionary trend of species widely used in the locality.

    19. Post operatory analgesia in caesarean surgery. Analgesia posoperatoria en la operación cesárea.

      OpenAIRE

      María Antonia Cabezas Poblet; Rolando T. Espín González; Guyen Cuellar Chang; Bárbara Lucía Cabezas Poblet

      2003-01-01

      Background: Post-operatory pain is a spread and constant problem during the care of the surgical patient. The tendency to find new therapeutic techniques to alleviate pain has lead scientists to make and use a great variety of analgesics which are administered by different vias. The effects of narcotics on the new born are well known and the author´s worries about this problem has been the motivational point to search about the use of epidural and intratecal narco...

    20. Martine Monacelli et Michel Prum. Ces hommes qui épousèrent la cause des femmes

      Directory of Open Access Journals (Sweden)

      Frédéric REGARD

      2010-09-01

      Full Text Available Cet ouvrage collectif compte dix chapitres, consacrés chacun à l’un des « pionniers » hommes du féminisme. Les militants ou sympathisants sont  pour certains très célèbres, mais pour d’autres pratiquement inconnus, William Godwin, John Stuart Mill, William Thompson et Edward Carpenter côtoyant William Johnson Fox, George Lansbury, Israel Zangwill, Frederick Pethic-Lawrence, Frederick Billington-Greig ou encore Victor Duval. Une bibliographie sélective complète l’ouvrage, malheureusement dépou...

    1. CalEnviroScreen 1.0 (CES) Group, California, 2013, California EPA and Office of Environmental Health Hazard Assessment

      Data.gov (United States)

      U.S. Environmental Protection Agency — Developed jointly by the Agency and the Office of Environmental Health Hazard Assessment (OEHHA), the tool uses data about 11 types of pollution and environmental...

    2. Un proyecto educativo-cultural socialista: la Fundación Cesáreo del Cerro

      Directory of Open Access Journals (Sweden)

      Francisco de LUIS MARTÍN

      2010-03-01

      Full Text Available RESUMEN: Desde un principio, los trabajos de investigación sobre el socialismo español se han centrado preferentemente en aspectos como su historia política o los grandes debates ideológicos en que se vieron envueltas sus organizaciones. Como acertadamente señala Santos Julia, razones de afición y, sobre todo, de documentación explicarían esta preferencia. Sin embargo, desde hace unos años, la ampliación del elenco de temas de estudio, por una parte, y la aparición de análisis regionales y locales, por otra, ha contribuido, cuantitativa y cualitativamente, a profundizar y clarificar las claves del socialismo en nuestro país. En este esfuerzo de clarificación de capítulos hasta hace poco olvidados merece destacarse el relativo al universo educativo-cultural de nuestro socialismo. Aunque los problemas que enfrenta este campo son abundantes y la desaparición, escasez o dispersión de fuentes no es el menor, a los trabajos ya clásicos de un buen puñado de estudiosos se suma hoy un grupo escogido de jóvenes investigadores que tratan de sistematizar los planteamientos educativos del socialismo.

    3. DIFFEREnCEs In sUBJECtIVE WELL-BEInG WItHIn HoUsEHoLDs ...

      African Journals Online (AJOL)

      of spouses to influence decision-making and resource allocation. However, it is typically difficult to ..... wisdom and emotional intelligence increase with age, and that 'older people have an increased ability to ..... Social Attitudes Survey conducted by the Human Sciences Research Council on 2 000 to 3 000 individuals. 2.

    4. Quatre espèces nouvelles d’Élatérides de l’ile de Sumatra

      NARCIS (Netherlands)

      Candèze, E.

      1887-01-01

      Piceus, pube fulva subsericea dense obductus; antennis articulo tertio quarto breviore; prothorace latitudine longiore, creberrime punctato, medio longitrorsum et late elevato, angulis posticis tenuibus, valde divaricatis, apice acutis; elytris tenuiter punctato-seriatis, apice breviter emarginatis.

    5. Contribution of the CesR-regulated genes llmg0169 and llmg2164-2163 to Lactococcus lactis fitness

      NARCIS (Netherlands)

      Roces, Clara; Campelo, Ana B.; Veiga, Patrick; Pinto, Joao P. C.; Rodriguez, Ana; Martinez, Beatriz

      2009-01-01

      Lactococcus lactis is one of the main components of the starter cultures used in cheese manufacture. As starter, L lactis must tolerate harsh conditions encountered either during their production in bulk quantities or during dairy products processing. To face these hostile conditions, bacteria

    6. Validity of Center for Epidemiologic Studies Depression (CES-D scale in a sample of Iraq and Afghanistan Veterans

      Directory of Open Access Journals (Sweden)

      Ana R Quiñones

      2016-04-01

      Full Text Available Objectives: Optimal depression screening necessitates measurement tools that are valid across varied populations and in the presence of comorbidities. Methods: This study assessed the test properties of two versions of the Center for Epidemiologic Studies Depression scale against psychiatric diagnoses established by the Mini International Neuropsychiatric Interview among a clinical sample of US Veterans deployed during Operations Enduring Freedom, Iraqi Freedom, and New Dawn. Participants (N = 359 recruited from two Department of Veterans Affairs hospitals completed a clinical interview, structured diagnostic interview, and self-reported measures. Results: Based on diagnostic interview and the Diagnostic and Statistical Manual of Mental Disorders 4th Edition criteria, 29.5% of the sample met diagnostic criteria for major depressive disorder and 26.5% met diagnostic criteria for post-traumatic stress disorder. Both Center for Epidemiologic Studies Depression-20 and Center for Epidemiologic Studies Depression-10 scales performed well and almost identically against the Mini International Neuropsychiatric Interview-major depressive disorder in identifying Veterans with major depressive disorder (Center for Epidemiologic Studies Depression-20 area under the Receiver Operating Characteristic curve 91%; Center for Epidemiologic Studies Depression-10 area under the ROC curve 90%. Overall, higher cut points for the Center for Epidemiologic Studies Depression scales performed better in correctly identifying true positives and true negatives for major depressive disorder (Center for Epidemiologic Studies Depression-20 cut point 18+ sensitivity 92% specificity 72%; Center for Epidemiologic Studies Depression-10 cut point 10+ sensitivity 92% specificity 69%. Conclusions: The specificity of the Center for Epidemiologic Studies Depression scales was poor among Veterans with co-occurring post-traumatic stress disorder (13% and 16%. Veterans with post-traumatic stress disorder who have a positive depression screen should have a more thorough assessment of mental health symptoms and comorbidities, rather than immediate diagnosis of and treatment for depression.

    7. M and S Resource Discovery and Access (Communication des ressources de M and S et acces a ces ressources)

      Science.gov (United States)

      2016-12-01

      document “ climate modeling results” and has established an associated metadata catalog. [10] Spain, France, and others are members of the Drug Disease...Implementation Guide. Version 1. [10] Guilyardi, E., et al. (2013) Documenting Climate Models and Their Simulations. Bull. Amer. Meteor. Soc., 94...PAYS-BAS Ministry of Defence ESTONIE Royal Netherlands Military Central Registry for EU & NATO Estonian National Defence College Academy Library

    8. El capital intelectual y su relación con la innovación en la universidad CES

      OpenAIRE

      Tamayo Montoya, Veronica Mariela

      2016-01-01

      En la sociedad actual del conocimiento las universidades tienen la responsabilidad de generar conocimiento e innovaciones para ofrecer soluciones a problemas de comunidades de interés. Para lograrlo las universidades deben enfocarse en su activo más importante, su capital intelectual. Hasta ahora las investigaciones relacionadas con el capital intelectual y la innovación en las universidades, son limitadas a pesar de ser un elemento estratégico para la dirección de estas organizaciones, ya qu...

    9. Implicaciones anestésicas de la obesidad en pacientes sometidas a una cesárea

      OpenAIRE

      Serrano, Mari Luz

      2009-01-01

      La obesidad en la embarazada debe ser considerada una situación de alto riesgo porque se asocia a complicaciones a corto y largo plazo. La obesidad supone un factor de riesgo anestésico. En el informe presentado en 2007 por "The Confidential Enquiry into Maternal and Child Health" (CEMACH) había seis muertes que estaban directamente relacionadas con la anestesia de las que cuatro eran pacientes obesas y dos obesas mórbidas. Además de la patología previa coexistente con la obesidad como ...

    10. Modifications anatomiques après écorçage de trois espèces au sud ...

      African Journals Online (AJOL)

      SARAH

      31 juil. 2017 ... post-bark stress leading to bark removal in the first months, the species should be harvested ... exploiting these Non Wood Forest Products that after harvesting the bark, the trees should be left free for a ..... oxidative damage.

    11. CARACTERIZACIÓN MOLECULAR Y GERMINACIÓN DE SEMILLAS DE MAÍCES CRIOLLOS AZULES CON ENVEJECIMIENTO ACELERADO

      Directory of Open Access Journals (Sweden)

      Dagoberto Dur\\u00E1n-Hern\\u00E1ndez

      2011-01-01

      Full Text Available El objetivo del presente estudio fue determinar el efecto del envejecimie nto acelerado en semillas de varie dades criollas de maíz azul. En los laboratorios de la Universidad Nacional Autónoma de México y del Instituto Politécnico Nacional, semillas de cuatro varie dades criollas de maíz azul (Cuijingo, Cocotitlán, Puebla y Oaxaca, se sometie ron a dos tip os de envejecimie nto acelerado: calor húmedo (41°C, 72 horas y 100% h. r. y calor seco (60°C, 48 horas. Se evaluaron: protrusión radicular de 0 a 72 horas de imbibición y, a los sie te días de incubación a 25°C, plántulas normales, anormales y semillas muertas. Se obtuvo la caracterización molecular de los tratamie ntos mediante la RA PD y se construyeron los dendogramas respectivos. En plántulas normales provenie ntes de semillas sin envejecimie nto acelerado, las varie dades Oaxaca y Puebla fueron significativamente superiores. El peso seco en las plántulas disminuyó con el deterioro, sie ndo exigua con calor seco. La presencia de plántulas anormales se incrementó con ambos tip os de deterioro en el orden: Oaxaca, Puebla, Cocotitlán y Cuijingo. La diferenciación de los perfiles de bandeo entre semillas testigo y deterioradas ocurrió con la secuencia: Oaxaca (31,6%, Cocotitlán (25,8%, Puebla (19,6% y Cuijingo (18,6%. Estos valores de similitud, a los cuales se ramificaron los perfiles genómicos, se asociaron de manera inversa con el nivel de vigor de las semillas, y directamente con la presencia de anormalidades en las plántulas obtenidas.

    12. Materiales compuestos biodegradables con usos agronómicos a partir de raíces tuberosas

      OpenAIRE

      Versino, Florencia

      2017-01-01

      Los materiales poliméricos abarcan un amplio abanico de compuestos tanto naturales (proteínas, almidones, etc.) como sintéticos (polietilenos, poliuretanos, resinas epoxy, etc.) cuya versatilidad y fácil procesamiento los ha vuelto adecuados para un gran número de aplicaciones industriales. A raíz de la creciente necesidad de mitigar las emisiones de gases de efecto invernadero, reducir la acumulación de residuos sólidos y disminuir el consumo de recursos no renovables, el interés en el desar...

    13. De la lecture de connaissances mathématiques dans le milieu socioculturel aux conditions de transmission de ces connaissances

      Directory of Open Access Journals (Sweden)

      Alexandre Mopondi - Bendeko

      2013-01-01

      Full Text Available Works on the teaching of mathematics continue to be of interest to researchers in mathematical education, which today are the effective solutions to the different human communities. It is a bet which seeks, among other things, research of articulation betw een several theories to a new domain, better adapted. We will talk about the relationship between the theory of didactical situations in mathematics and ethnomathematics, which provides elements of a new area where the didactic transposition of a mathemat ical situation in a teaching situation in mathematics found in didactic engineering engine of transformation and adaptation of the situation. It is with the game of Ngola that we tried to illustrate this process of transformation and adaptation.

    14. On Medical Progress and Health Care Demand: A Ces Perspective Using the Grossman Model of Health Status.

      Science.gov (United States)

      Batinti, Alberto

      2015-12-01

      I propose an application of the pure-consumption version of the Grossman model of health care demand, where utility depends on consumption and health status and health status on medical care and health technology. I derive the conditions under which an improvement in health care technology leads to an increase/decrease in health care consumption. In particular, I show how the direction of the effect depends on the relationship between the constant elasticity of substitution parameters of the utility and health production functions. I find that, under the constancy assumption, the ratio of the two elasticity of substitution parameters determines the direction of a technological change on health care demand. On the other hand, the technology share parameter in the health production function contributes to the size but not to the direction of the technological effect. I finally explore how the ratio of the elasticity of substitution parameters work in measurement and practice and discuss how future research may use the theoretical insight provided here. Copyright © 2014 John Wiley & Sons, Ltd.

    15. Ces poisons qui tuent dans les entreprises Un cancer sur dix serait d'origine professionnelle chez les hommes

      CERN Multimedia

      Noël, Florence

      2005-01-01

      Geneva launched an expertise of all the buildings built before 1991. Ill, a former employee of CERN testifies. On their side, several thousands of victims of asbestos demonstrated on Saturday in Paris

    16. Développement Odoo pour la gestion de pièces de rechange, pour un client de SOGESI.

      OpenAIRE

      BENFEDEL, Ahmed; KAZI AOUL, Abdessamad

      2016-01-01

      Ce stage de fin d’études a été une occasion pour nous pour une immersion dans le monde des ERP et de l’entreprise avec plus de responsabilités. Dans notre projet de fin d’études, le travail a été réalisé au sein de la société SOGESI. Dans ce cadre, nous avons travaillé sur un projet réel et un besoin bien spécifique d’une entreprise cliente de la société SOGESI. Pour ce faire, nous avons commencé par l’analyse des besoins, Par la suite, nous nous s...

    17. La collection de base des espèces sauvages de Phaseolus et Vigna : historique, gestion et conservation

      Directory of Open Access Journals (Sweden)

      Thierry Vanderborght

      1998-01-01

      Full Text Available The base collection of wild species of Phaseolus and Vigna: history, management and conservation.The National Botanic Garden of Belgium ensures the management of a base collection of botanical and wild forms in the tribe Phaseoleae and the sub-tribe Phaseolinae. The main objective is to conserve on a long terni basic the largest possible genetic diversity through seed semples stored at - 20°C. The collection provided the basic material for the investigations conducted at the University Faculty of Agricultural Sciences of Gembloux in fields as diverse as taxonomy, genome analysis, definition of genetic réservoirs, agronomie and chemical evaluations, interspecific hybridization and plant breeding. The results have allowed to becter understand the organization of genetic diversity in the studied plant material and to highlight the wealthy genetic potentiel of the collection. The latter should be preserved and valorized for the genetic improvement of food legumes, in particular within the two genera Phaseolus and Vigna.

    18. Roland Marais: Pièces de Viole, Livre II, 1738. Suites I–IV [recenze CD

      Czech Academy of Sciences Publication Activity Database

      Kapsa, Václav

      2011-01-01

      Roč. 19, č. 7 (2011), s. 54-54 ISSN 1210-8081 Institutional research plan: CEZ:AV0Z90580513 Keywords : music http://www.muzikus.cz/klasicka-hudba- jazz -recenze/Roland-Marais-Pices-de-Viole-Livre-II-1738-Suites-IIV~26~cervenec~2011/

    19. relations entre la diversité et la biomasse aérienne des espèces

      African Journals Online (AJOL)

      ACSS

      biomass and diversity indexes. We recorded a total of 215 tree species in all habitats, of which 57.2% were in old ... diversity could contribute up to 20% in the aboveground biomass. .... Rural (ANADER). Il s'agit des ...... Migratory Bird Centre.

    20. Study of neutron resonances of barium and copper isotopes by the time-of-flight method at low energies (0 to 15 keV); Etude des resonances de neutrons pour les isotopes du baryum et du cuivre par la methode de temps-de-vol a basse energie (0-15 kev)

      Energy Technology Data Exchange (ETDEWEB)

      Chevillon-Pitollat, P L [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

      1967-01-01

      Resonance parameters of Cu (0-15 keV) and Ba (0-1000 eV) have been determined, using the time-of-flight method. Spin assignment (J = I{+-}1/2) being not possible with usual capture methods, the 'sum coincident' method was used in Ba study. A careful analysis of transmission curves including interference effects between levels of the same spin afforded to assign the J value to the most of Cu resonances. Strength function values (S{sub 0}) for those nuclei I = 3/2 confirm previous results obtained for other nuclei having the same value of spin I = 3/2, i.e. S{sub 0} (J = 2) {approx_equal} 2 S{sub 0} (J = 1). Another result has to be mentioned: total radiative width exhibits large fluctuation for different isotopes of Cu and Ba. Experimental methods, specially the 'sum coincidence' one are described in detail and results are discussed in view of theoretical predictions. (author) [French] Les parametres des resonances de {sup 63}Cu et {sup 65}Cu ont ete determines dans le domaine d'energie de zero a 15 keV et ceux du baryum dans le domaine de zero a 1000 eV. Les methodes habituelles de capture n'etant pas applicables pour trouver la valeur du spin S = I{+-}1/2, la methode 'somme coincidence' fut appliquee pour l'attribution de J aux resonances du baryum tandis qu'une analyse soigneuse des courbes de transmission, tenant compte en particulier des effets d'interference entre niveaux de meme spin permettait de determiner J pour la plupart des resonances du cuivre. Les resultats trouves pour ces differents noyaux de spin I = 3/2 confirment ceux deja trouves pour d'autres noyaux I = 3/2 c'est-a-dire que la valeur de la fonction densite S{sub 0} pour J 2 est deux fois celle pour J = 1. Un autre resultat interessant est la variation de la largeur radiative totale pour les isotopes du cuivre et du baryum. Les methodes experimentales surtout la methode 'somme coincidence' sont decrites en detail et les resultats compares aux predictions theoriques. (auteur)

    1. Some magnetic resonance properties of solutions of sodium in liquid ammonia; Contribution a l'etude des solutions de sodium dans l'ammoniac liquide par resonance magnetique

      Energy Technology Data Exchange (ETDEWEB)

      Lambert, C [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

      1968-02-01

      differentes contributions au deplacement d'Overhauser, d'autre part. Les resultats obtenus montrent, en particulier, que la relaxation de l'azote, dans les solutions diluees, est due, a parts sensiblement egales, a l'interaction quadrupolaire et a l'interaction scalaire avec les electrons non apparies. Les mesures du deplacement d'Overhauser du aux protons montrent que la densite de spin sur ces noyaux est negative et confirment ainsi les travaux de Hughes. (auteur)

    2. Anestesia peridural para cesariana: estudo comparativo entre Bupivacaína Racêmica (S50-R50 e Bupivacaína com excesso enantiomérico de 50% (S75-R25 a 0,5% associadas ao Sufentanil Anestesia epidural para cesárea: estudio comparativo entre Bupivacaína Racémica (S50-R50 y Bupivacaína con exceso enantiomérico de 50% (S75-R25 a 0,5% asociadas al Sufentanil Epidural block for cesarean section: a comparative study between 0.5% racemic Bupivacaine (S50-R50 and 0.5% enantiomeric excess Bupivacaine (S75-R25 associated with Sufentanil

      Directory of Open Access Journals (Sweden)

      Angélica de Fátima de Assunção Braga

      2009-06-01

      bupivacaína racémica a 0,5% asociada a opioides por vía epidural constituye una técnica anestésica utilizada en cesárea, sin embargo su toxicidad se pone en tela de juicio. La bupivacaína con exceso enantiomérico de 50%, presenta un menor cardio y neurotoxicidad. Se evaluó la eficacia de la bupivacaína racémica y de la bupivacaína con exceso enantiomérico de 50% a 0,5%, asociadas al sufentanil, por vía epidural en embarazadas sometidas a la cesárea. MÉTODO: Cincuenta embarazadas a término, sometidas a la cesárea electiva bajo bloqueo epidural, distribuidas en dos grupos, de acuerdo con el anestésico local usado: Grupo I - bupivacaína racémica a 0,5% con vasoconstrictor; Grupo II - bupivacaína con exceso enantiomérico de 50% (S75-R25 a 0,5% con vasoconstrictor. En los dos grupos el anestésico local (100 mg estuvo asociado al sufentanil (20 µg y el volumen total usado de la solución fue de 24 mL. Se evaluaron: la latencia del bloqueo sensitivo; nivel máximo del bloqueo sensitivo; grado del bloqueo motor; tiempo para la regresión del bloqueo motor; duración de la analgesia; efectos colaterales maternos y repercusiones neonatales. RESULTADOS: La latencia, el nivel máximo del bloqueo sensitivo, el grado del bloqueo motor y la duración de la analgesia fueron similares en los dos grupos; el tiempo para la regresión del bloqueo motor fue significativamente menor en el Grupo II. Los efectos colaterales ocurrieron con frecuencia similar en los dos grupos. Hubo ausencia de alteraciones cardiocirculatorias maternas y repercusiones neonatales. CONCLUSIONES: La bupivacaína racémica y la bupivacaína con exceso enantiomérico de 50%, por vía epidural, proporcionan una anestesia adecuada para la realización de la cesárea. La bupivacaína con exceso enantiomérico de 50%, es una alternativa promisoria para ese tipo de procedimiento, por presentar un menor tiempo para la regresión del bloqueo motor, lo que mucho se desea en la paciente obst

    3. Contribution to the study of samarium-151 excited levels; Contribution a l'etude des niveaux excites du samarium-151

      Energy Technology Data Exchange (ETDEWEB)

      Locard, P [Commissariat a l' Energie Atomique, Centre d' Etudes Nucleaires de Grenoble, 38 (France)

      1967-07-01

      The nucleus of {sup 151}Sm, which has 89 neutrons, happens to be on the lower edge of the deformed nuclei of region II. Therefore, the study of its levels is very interesting for the verification of the goodness of the collective models for deformed nuclei when the deformation is small (we introduce these models in the first chapter). {sup 151}Sm has often been studied, but the direct gamma spectrum measured with a lithium drift-germanium detector (chapter 3) shows many high energy transitions which did not appear in the previous level schemes. In order to settle these transitions, we have undertaken gamma-gamma coincidence spectra (as well as sum-coincidence spectra) experiments with a scintillation spectrometer designed in our laboratory (chapter 2). The investigation of the intensities of these coincidences leads us to modify the last proposed level schemes: we suppress the levels at 405,5 and 650 keV, we add levels at 245,6 - 306,6 - 522 - 952 and 962 keV. We have also verified the multipolarities of the main transitions and measured the half-lives of a few levels (chapter 3) (we find a half-life of 1.1 {+-} 0.5 nanosecond for the level at 167,7 keV). In chapter 4, we compare our results to the predictions of the models described in chapter 1. (author) [French] Le noyau de {sup 151}Sm, qui possede 89 neutrons, se trouve a la limite inferieure des noyaux deformes de la region II. L'etude de ses niveaux excites est donc d'un interet tout particulier pour la verification de la validite des differents modeles collectifs pour les noyaux deformes, lorsque la deformation est petite (nous introduisons ces modeles dans un premier chapitre). Le {sup 151}Sm a deja fait l'objet de nombreuses etudes, mais le spectre gamma direct fait avec une jonction de germanium compense au lithium (chapitre 3), nous a montre l'existence d'un grand nombre de transitions de hautes energies qui ne sont pas placees dans les schemas proposes jusqu'a ce jour. Pour preciser la place de ces

    4. Use of electron beams for the production of radioactive nuclei through photo-fission; Utilisation de faisceaux d'electrons pour la production des noyaux radioactifs par photo-fission

      Energy Technology Data Exchange (ETDEWEB)

      M' garrech, Slah

      2004-09-01

      The IPN (institute of nuclear physics) of Orsay decided to build a linear accelerator in order to produce an electron beam of 50 MeV energy and of 10 {mu}A average intensity. It is the ALTO project (Linear Accelerator near the Tandem of Orsay). This project will be dedicated to the production of the radioactive ions using the photo-fission process. The central topic of this thesis is the study of the beam dynamics of the ALTO facility. The first part presents studies concerning the injector. The simulations made with the simulation code PARMELA allowed the optimization of the characteristics of pre-buncher (dephasing HF, accelerating field peak...) to obtain a good bunching factor at the entrance of the buncher and at the entrance of the accelerating section according to the distance separating the two systems. The second part of this thesis is related to measurements of transverse emittance of the beam at the buncher exit. The three gradients method has been selected and the optical system used is a solenoid. The results obtained are in good agreement with former measurements. Finally a calculation of the beam line was carried out to optimize the transport of the beam to the PARRNe target without degrading its characteristics. The calculation codes that have been used are BETA and TRACE-WIN. (author)

    5. Proton scattering from unstable nuclei {sup 20}O, {sup 30}S, {sup 34}Ar: experimental study and models; Diffusion de protons sur les noyaux instables {sup 20}O, {sup 30}S, {sup 34}Ar: etude experimentale et developpement de modeles

      Energy Technology Data Exchange (ETDEWEB)

      Khan, Elias [Institut de Physique Nucleaire, CNRS - IN2P3, Universite Paris - Sud, 91406 Orsay Cedex (France)

      2000-01-28

      Elastic and inelastic proton scattering from the unstable nuclei {sup 20}O, {sup 30}S and {sup 34}Ar were measured in inverse kinematics at the Grand Accelerateur National d'Ions Lourds. Secondary beams of {sup 20}O at 43 MeV/A, {sup 30}S at 53 MeV/A and {sup 34}Ar at 47 MeV/A impinged on a (CH{sub 2}){sub n} target. Recoiling protons were detected in the silicon strip array MUST. Energies and angular distributions of the first 2{sup +} and 3{sup -} states were measured. A phenomenological analysis yields values of the deformation parameters {beta}{sub 2} and {beta}{sub 3} of 0.55 (6) and 0.35 (5) for {sup 20}O, 0.32 (3) and 0.22 (4) for {sup 30}S, 0.27 (2) and 0.39 (3) for {sup 34}Ar, respectively, and allows the extraction of the ratio of neutron to proton transition matrix elements (M{sub n}/M{sub p})/(N/Z) for 2{sup +} states: 2.35 (37) for {sup 20}O, 0.93 (20) for {sup 30}S and 1.35 (28) for {sup 34}Ar. Therefore the proton rich nuclei {sup 30}S and {sup 34}Ar show a 2{sup +} excitation of isoscalar character whereas the excitation of {sup 20}O is of isovector character. In order to perform a microscopic analysis of the data, we have developed a QRPA model, using three Skyrme interaction: SIII, SG2, SLy4. This model reproduces measured B(EL) values for the oxygen, sulfur and argon isotopic chains, whereas RPA calculations, which do not take pairing into account, underestimate these values. In the case of the QRPA model the energies of the first 2{sup +} state are overestimated by about 1 MeV, but the evolution along the isotopic chains is well reproduced. (M{sub n}/M{sub p})/(N/Z) ratios for the first 2{sup +} state deduced from the microscopic analysis using QRPA are 1.98 for {sup 20}O, 1.05 for {sup 30}S and 1.00 for {sup 34}Ar, in agreement with the conclusions of the phenomenological analysis. However important discrepancies are observed between the two types of analysis for other isotopes, in particular neutron rich argon and sulfur nuclei. (author)

    6. Methodology of hot nucleus calorimetry and thermometry produced by nuclear reactions around Fermi energies; Methodologie de la calorimetrie et de la thermometrie des noyaux chauds formes lors de collisions nucleaires aux energies de Fermi

      Energy Technology Data Exchange (ETDEWEB)

      Vient, E

      2006-12-15

      This work deals with the calorimetry and thermometry of hot nuclei produced in collisions Xe + Sn between 25 and 100 MeV/u. The apparatus for hot nucleus physical characterization is the 4{pi} detector array Indra. This study was made by using the event generators Gemini, Simon and Hipse and a data-processing filter simulating the complete operation of the multi-detector. The first chapter presents the different ways of producing hot nuclei. In the second and third chapters, the author presents a critical methodological study of calorimetry and thermometry applied to hot nuclei, different methods are reviewed, their accuracy and application range are assessed. All the calorimetry methods rely on the assumption that we are able to discriminate decay products of the hot nucleus from evaporated particles. In the fourth chapter, the author gives some ways of improving calorimetry characterization of the hot nucleus. An alternative method of calorimetry is proposed in the fifth chapter, this method is based on the experimental determination of an evaporation probability that is deduced from the physical characteristics of the particles present in a restricted domain of the space of velocities.

    7. Study of neutron rich nuclei by delayed neutron decay using the Tonnerre multidetector; Etude de la decroissance par neutrons retardes de noyaux legers riches en neutrons avec le multidetecteur tonnerre

      Energy Technology Data Exchange (ETDEWEB)

      Timis, C.N

      2001-07-01

      A new detection array for beta delayed neutrons was built. It includes up to 32 plastic scintillation counters 180 cm long located at 120 cm from the target. Neutron energy spectra are measured by time-of-flight in the 300 keV-15 MeV range with good energy resolution. The device was tested with several known nuclei. Its performances are discussed in comparison with Monte Carlo simulations. They very high overall detection efficiency on the TONNERRE array made it possible to study one and two neutron emission of {sup 11}Li. A complete decay scheme was obtained. The {sup 33}Mg and {sup 35}Al beta decays were investigated for the first time by neutron and gamma spectroscopy. Complete decay schemes were established and compared to large scale shell-model calculations. (authors)

    8. Study of proton and 2 protons emission from light neutron deficient nuclei around A=20; Etude de l'emission proton et de deux protons dans les noyaux legers deficients en neutrons de la region A=20

      Energy Technology Data Exchange (ETDEWEB)

      Zerguerras, T

      2001-09-01

      Proton and two proton emission from light neutron deficient nuclei around A=20 have been studied. A radioactive beam of {sup 18}Ne, {sup 17}F and {sup 20}Mg, produced at the Grand Accelerateur National d'Ions Lourds by fragmentation of a {sup 24}Mg primary beam at 95 MeV/A, bombarded a {sup 9}Be target to form unbound states. Proton(s) and nuclei from the decay were detected respectively in the MUST array and the SPEG spectrometer. From energy and angle measurements, the invariant mass of the decaying nucleus could be reconstructed. Double coincidence events between a proton and {sup 17}F, {sup 16}O, {sup 15}O, {sup 14}O and {sup 18}Ne were registered to obtain excitation energy spectra of {sup 18}Ne, {sup 17}F, {sup 16}F, {sup 15}F et {sup 19}Na. Generally, the masses measures are in agreement with previous experiments. In the case of {sup 18}Ne, excitation energy and angular distributions agree well with the predictions of a break up model calculation. From {sup 17}Ne proton coincidences, a first experimental measurement of the ground state mass excess of {sup 18}Na has been obtained and yields 24,19(0,15)MeV. Two proton emission from {sup 17}Ne and {sup 18}Ne excited states and the {sup 19}Mg ground state was studied through triple coincidences between two proton and {sup 15}O, {sup 16}O and {sup 17}Ne respectively. In the first case, the proton-proton relative angle distribution in the center of mass has been compared with model calculation. Sequential emission from excited states of {sup 17}Ne, above the proton emission threshold, through {sup 16}F is dominant but a {sup 2}He decay channel could not be excluded. No {sup 2}He emission from the 1.288 MeV {sup 17}Ne state, or from the 6.15 MeV {sup 18}Ne state has been observed. Only one coincidence event between {sup 17}Ne and two proton was registered, the value of the one neutron stripping reaction cross section of {sup 20}Mg being much lower than predicted. (author)

    9. Study of the structure of light neutron rich nucleus with the Tonnerre array; Etude de la structure de noyaux legers riches en neutrons a l'aide du multidetecteur Tonnerre

      Energy Technology Data Exchange (ETDEWEB)

      Pietri, St

      2003-06-01

      This work concern the technical development made on the multidetector TONNERRE and the study of the {sup 34}Si nucleus by a complete beta-neutron-gamma spectroscopy. In the first part various tests performed on modules of the detector in the 'Centre d'Etude de Bruyere le Chatel' are presented. A modification of the embassies of the photomultipliers tubes allows to gain more than 50% in the neutron efficiency and to obtain a threshold lower than 300 keV for the neutron energy. A complete C++ simulation of the neutron propagation in the array was carried out. It explains that the slow component of the light output of the scintillator may be responsible of the shape of the time-of-flight spectrum. The second part of these report presents the experiment devoted to the study of the structure of the {sup 34}Si from the beta decay of the {sup 34}Al. It was performed at the GANIL facility using the TONNERRE array and germanium of ENOGAM. The {sup 34}Al was produced by projectile fragmentation of a {sup 36}S beam of 50 MeV/A in a target of {sup 9}Be. A complete beta scheme of the {sup 34}Al is proposed. Eight neutron lines following the {sup 34}Al decay were observed for the first time. Finally we suggest that a monopolar transition could occur in the {sup 34}Si nucleus signing a O{sup +}{sub 2} state at 2133 keV. (author)

    10. Dynamics and structure of light nuclei through (e,e'p) reactions with high momentum; Dynamique et structure des noyaux legers en diffusion (e,e'p) a grandes impulsions

      Energy Technology Data Exchange (ETDEWEB)

      Voutier, E

      2005-09-15

      The (e,e'p) reaction is an efficient and accurate means to probe nuclear structure because of its simplicity (in the case of light nuclei exact calculations can be made) and because the entire nuclear volume is probed. Now high energy electron beams are available which allows nuclear matter to be investigated on distances shorter than the nucleon diameter, and as a consequence the measurement of effects linked to the internal structure of the nucleon appears reachable. Recent experiments performed at the Jefferson Laboratory on deuterium and helium targets have shown that the cross-section (e,e'p) with high momentum missing is dominated by many-body processes involving the propagation of a nucleon in the nuclear matter. The importance of these re-diffusion mechanisms can be amplified or minimized by acting on the value of the missing momentum or on the angle of the recoil particle. These experiments highlight the sensitivity of the He{sup 3}(e,e'p)pn reactions to nucleon-nucleon correlations and their importance at high momentum missing. Theoretical results predict a very narrow window in anti-parallel kinematics through which an important reduction of the many-body mechanism is expected. The study of the color transparency effect through quasi-elastic scattering in light nuclei uses the re-diffusion features to show the existence of a small spatial extension of the nucleon's wave function. Recent development in the formalism of generalized parton distributions open the way for a systematic and complete study of the internal structure of the nucleon. (A.C.)

    11. Study of the superdeformed states of the gadolinium nuclei: neutron excitations in {sup 147}Gd nucleus; Etude des etats superdeformes de noyaux de Gadolinium: Excitations neutron dans le noyau {sup 147}Gd

      Energy Technology Data Exchange (ETDEWEB)

      Khadiri, Najia [Institut de Recherche Subatomique, CNRS-IN2P3 - Universite Louis Pasteur, 67 - Strasbourg (France)

      1997-10-17

      This work is devoted to nuclear structure studies of superdeformed states in the second potential well. Under focus are the gadolinium isotopes and in particular the {sup 147}Gd nucleus. High spin states in {sup 147}Gd have been populating by {sup 122}Sn ({sup 30}Si,5n){sup 147}Gd fusion-evaporation reaction with a silicon beam of 158 MeV delivered by the VIVITRON accelerator of the Institut de Recherches Subatomiques. The nucleus {gamma} de-excitations have been measured using the EUROGAM II {gamma}-ray multidetector. On the basis of multiple coincidences, four new superdeformed (SD) rotational bands have been assigned to {sup 147}Gd nucleus. Nuclear structures corresponding to these bands have been investigated by shell model calculations using a harmonic oscillator potential with cranking, in the Nilsson Strutinsky formalism. Comparison of dynamical moments of inertia of band (1) and (5) in {sup 147}Gd with {sup 148}Gd(2) and {sup 146}Gd(1) SD bands has fixed the role of the [651 1/2]{alpha} = -1/2 orbital crossing frequency. Theoretical calculations reproduce quite well the {sup 148}Gd(2), {sup 127}Gd(1,5) and G{sup 146}Gd(1) dynamical moments of inertia. Using the particle hole excitation nature of {sup 149,148,147,146}Gd bands, effective spin alignment of [651 1/2]{alpha}= {+-}1/2, [770 1/2]{alpha} = -1/2 and [441 1/2]{alpha} = +1/2 orbitals have been deduced from the experiment in agreement with the theoretical values. Of particular interest, the spin alignment measured for the [441 1/2]{alpha} +1/2 orbital, with a value close to zero, is in contradiction with the value predicted by the Pseudo SU(3) model, formalism often used to explain the identical band phenomenon. (author) 68 refs., 41 figs., 17 tabs.

    12. Mass measurement of halo nuclides and beam cooling with the mass spectrometer Mistral; Mesure de masse de noyaux a halo et refroidissement de faisceaux avec l'experience MISTRAL

      Energy Technology Data Exchange (ETDEWEB)

      Bachelet, C

      2004-12-01

      Halo nuclides are a spectacular drip-line phenomenon and their description pushes nuclear theories to their limits. The most critical input parameter is the nuclear binding energy; a quantity that requires excellent measurement precision, since the two-neutron separation energy is small at the drip-line by definition. Moreover halo nuclides are typically very short-lived. Thus, a high accuracy instrument using a quick method of measurement is necessary. MISTRAL is such an instrument; it is a radiofrequency transmission mass spectrometer located at ISOLDE/CERN. In July 2003 we measured the mass of the Li{sup 11}, a two-neutron halo nuclide. Our measurement improves the precision by a factor 6, with an error of 5 keV. Moreover the measurement gives a two-neutron separation energy 20% higher than the previous value. This measurement has an impact on the radius of the nucleus, and on the state of the two valence neutrons. At the same time, a measurement of the Be{sup 11} was performed with an uncertainty of 4 keV, in excellent agreement with previous measurements. In order to measure the mass of the two-neutron halo nuclide Be{sup 14}, an ion beam cooling system is presently under development which will increase the sensitivity of the spectrometer. The second part of this work presents the development of this beam cooler using a gas-filled Paul trap. (author)

    13. Etude de l'influence de l'énergie de correction de couches sur les réactions nucléaires menant à la région des noyaux superlourds

      OpenAIRE

      Marchix , A.

      2007-01-01

      The aim of this PhD is to study the influence of shell correction energy on the desexcitation of superheavy nuclei. For that purpose, a new statistical code, called Kewpie2, which is based on an original algorithm allowing to have access to very weak probabilities, was developed. The results obtained with Kewpie2 were compared to the experimental data on residue cross sections obtained by cold fusion (Z=108 to Z=113) and by hot fusion (Z=112, Z=114 and Z=116), as well as data on fission times...

    14. Study of the unbound nuclei {sup 7,9}He and {sup 10}Li; Etude de la structure des noyaux non lies {sup 7,9}He et {sup 10}Li

      Energy Technology Data Exchange (ETDEWEB)

      Al Falou, H

      2007-07-15

      The unbound nuclei {sup 7,9}He and {sup 10}Li have been investigated via the high-energy breakup of beams of neutron-rich nuclei ({sup 8}He, {sup 11}Be and {sup 14}B). The decay-energy spectra were reconstructed from coincident measurements of the charged fragments ({sup 6,8}He and {sup 9}Li) with a {delta}E-E telescope (CHARISSA) and the neutrons with the DEMON array. A theoretical approach based on the sudden approximation was used to model the reactions populating the unbound final states. The calculated decay-energy spectra were convoluted with the response function of the experimental setup using a simulation developed specifically for the present study and compared with the experimental results. The {sup 10}Li system was produced using an {sup 11}Be beam and the results confirm the continuation of the inversion of the {nu}1s1/2 and {nu}0p1/2 levels in the N = 7 isotopic chain. The {sup 9}He system was produced in two different ways with the breakup of {sup 11}Be and {sup 14}B, and was the most exotic system studied here. In this case, a structure was observed at very low decay energy which very probably corresponds to a virtual s state (a{sub s} {approx_equal} -2 - 0 fm). This result suggests that the level inversion also occurs in {sup 9}He, but with a much weaker core-neutron interaction than for {sup 10}Li (a{sub s} equals -14 {+-} 2 fm). For the data acquired from the breakup of the {sup 14}B beam, the decay energy spectrum exhibits a resonance around E{sub r} equals 1.2 MeV, which most probably corresponds to an excited 1/2{sup -} state in {sup 9}He. The {sup 7}He system was investigated with three different beams ({sup 8}He, {sup 11}Be and {sup 14}B). No evidence for the existence of the proposed low-lying (E{sub r} {approx} 1 MeV) spin-orbit partner (1/2{sup -}) of the ground state (3/2{sup -}) could be found. (author)

    15. Heavy nucleus resonant absorption in heterogeneous lattices. I- Apollo 2 self-shielding formalism; Absorption resonnante des noyaux lourds dans les reseaux heterogenes. I -Formalisme du module d`autoprotection d`Apollo 2

      Energy Technology Data Exchange (ETDEWEB)

      Coste, M.

      1994-01-01

      This note gives in detailed way the self-shielding formalism which is used in the multigroup transport code APOLLO2. The self-shielded cross-sections are performed with the same scheme as in APOLLO1. We use two equivalencies, first an heterogeneous/homogeneous equivalence which gives the reaction rates and then a multigroup equivalence in order to obtain the cross-sections which preserve these reaction rates. However, numerous improvements were implemented, specially in the homogenization step. Homogenization can be performed group per group with different modelizations of the heavy slowing-down operator (statistical, intermediary and ``wide resonance`` models), which allows us to fit correctly the resonance shapes. Moreover, we can take exactly into account the spatial interferences between resonant isotopes with the background matrix model. Consequently, we are now able to perform, for instance, the radial distribution of the resonant absorption inside a fuel pin. (author). 7 refs., 3 figs.

    16. Study of proton and 2 protons emission from light neutron deficient nuclei around A=20; Etude de l'emission proton et de deux protons dans les noyaux legers deficients en neutrons de la region A=20

      Energy Technology Data Exchange (ETDEWEB)

      Zerguerras, T

      2001-09-01

      Proton and two proton emission from light neutron deficient nuclei around A=20 have been studied. A radioactive beam of {sup 18}Ne, {sup 17}F and {sup 20}Mg, produced at the Grand Accelerateur National d'Ions Lourds by fragmentation of a {sup 24}Mg primary beam at 95 MeV/A, bombarded a {sup 9}Be target to form unbound states. Proton(s) and nuclei from the decay were detected respectively in the MUST array and the SPEG spectrometer. From energy and angle measurements, the invariant mass of the decaying nucleus could be reconstructed. Double coincidence events between a proton and {sup 17}F, {sup 16}O, {sup 15}O, {sup 14}O and {sup 18}Ne were registered to obtain excitation energy spectra of {sup 18}Ne, {sup 17}F, {sup 16}F, {sup 15}F et {sup 19}Na. Generally, the masses measures are in agreement with previous experiments. In the case of {sup 18}Ne, excitation energy and angular distributions agree well with the predictions of a break up model calculation. From {sup 17}Ne proton coincidences, a first experimental measurement of the ground state mass excess of {sup 18}Na has been obtained and yields 24,19(0,15)MeV. Two proton emission from {sup 17}Ne and {sup 18}Ne excited states and the {sup 19}Mg ground state was studied through triple coincidences between two proton and {sup 15}O, {sup 16}O and {sup 17}Ne respectively. In the first case, the proton-proton relative angle distribution in the center of mass has been compared with model calculation. Sequential emission from excited states of {sup 17}Ne, above the proton emission threshold, through {sup 16}F is dominant but a {sup 2}He decay channel could not be excluded. No {sup 2}He emission from the 1.288 MeV {sup 17}Ne state, or from the 6.15 MeV {sup 18}Ne state has been observed. Only one coincidence event between {sup 17}Ne and two proton was registered, the value of the one neutron stripping reaction cross section of {sup 20}Mg being much lower than predicted. (author)

    17. Mass measurement project by determination of Q{sub {beta}} for neutron-rich nuclei; Projet de mesure des masses par determination des Q{sub {beta}} pour des noyaux tres riches en neutrons

      Energy Technology Data Exchange (ETDEWEB)

      Pautrat, M; Lagrange, J M; Petizon, L [Paris-11 Univ., 91 - Orsay (France). Inst. de Physique Nucleaire; Vanhorenbeeck, J; Duhamel, P [Brussels Univ. (Belgium). Inst. d` Astronomie et d` Astrophysique; Binon, F [Universite Libre de Bruxelles (Belgium)

      1994-12-31

      The aim of the project described hereafter is to collect new data on the exotic neutron rich nuclei of the Fe to Zn region, and in particular to determine their masses, for both nuclear physics and astrophysics purposes. These isotopes will be produced through projectile fragmentation at the GANIL facility and selected by the LISE3 spectrometer. Their half-lives will be measured as well as the energy of their main {gamma} rays; {gamma} - {gamma} coincidences will then allow to build a preliminary level scheme. The analysis of {beta} spectra and {beta} - {gamma} coincidences will finally provide the maximum {beta} decay energies of the studied nuclei leading to their masses. The difficulties arising from the low production rates, the {beta} detection, the data handling are discussed together with the solutions proposed to overcome them. (authors). 17 refs.

    18. Theory of a metrology for the earths magnetic field based on the resonance of polarised atomic nuclei (1962); Theorie d'une metrologie du champ magnetique terrestre basee sur la resonance de noyaux atomiques polarises (1962)

      Energy Technology Data Exchange (ETDEWEB)

      Bonnet, G [Commissariat a l' Energie Atomique, Grenoble (France). Centre d' Etudes Nucleaires

      1961-06-15

      The problems presented by the metrology of the earths field are studied from two points of view. a. The first, purely physical, concerns the study of NMR transducers in their role for the transformation of the magnetic field into a frequency. The possibilities and limitations are outlined. The use of an equivalent model is introduced systematically in the considerations of NMR phenomena, this makes it possible to treat all problems of interaction between a spin system and an electric detection system in a unified form. b. The other point of view concerns the restitution of the nuclear signal frequency in the form of a directly perceptible observable. The treatment of information is considered from a statistical angle, which leads to the study of an optimisation process concerning the linearization of the measurement as well as the minimisation of noise effects. (author) [French] Les problemes que pose la metrologie du champ terrestre sont etudies sous un double aspect: a. L'un, purement physique, concerne l'etude des traducteurs a RMN dans leur role de transformation du champ magnetique en une frequence. On en degage les possibilites et les limitations. L'emploi d'un modele equivalent est introduit de maniere systematique pour rendre compte des phenomenes de RMN, ce qui permet de traiter sous forme unifiee tous les problemes d'interaction entre un systeme de spins et un systeme electrique de detection. b. L'autre aspect concerne la restitution de la frequence du signal nucleaire sous la forme d'une observable directement perceptible. On considere le traitement de l'information sous l'aspect statistique, ce qui amene a etudier un processus d'optimisation concernant la linearisation de la mesure aussi bien que la minimisation des effets des bruits. (auteur)

    19. Study and modeling of the most energetic Active Galactic Nuclei with the Fermi satellite; Etude et modelisation des noyaux actifs de galaxie les plus energetiques avec le satellite Fermi

      Energy Technology Data Exchange (ETDEWEB)

      Sanchez, D.

      2010-06-15

      The Fermi satellite was launched in June 2008. The onboard LAT detector is dedicated to the study of galactic and extra-galactic gamma sources with an energy comprised between 200 MeV and 300 GeV. 1451 sources have been detected in less than 11 months. This document is divided into 6 chapters: 1) gamma astronomy, 2) the Fermi satellite, 3) the active galactic nuclei (NAG), 4) the observation of several blazars (PKS-2155-304 and PG-1553+113) and its simulation, 5) the observation of PKS-2155-304 with both RXTE and Fermi, and 6) conclusion

    20. Study of the (p,px) reaction at 156 MeV on some light nuclei; Etude de la reaction (p,px) a 156 Mev sur quelques noyaux legers

      Energy Technology Data Exchange (ETDEWEB)

      Bachelier, Daniel

      1971-05-04

      This research thesis reports the study of four quasi-elastic diffusion reactions of (p,px) type at 156 MeV: {sup 6}Li(p,pd ){sup 4}He, {sup 6}Li(p,pr){sup 3}H, {sup 7}Li(p,pt){sup 4}He and {sup 12}C(p,pd){sup 10}B. The objectives were to check the quasi-elastic character of these reactions and to describe them by pulse approximations with plane waves, to study their selection rules and to understand their angular correlations with respect to momentum distribution in the target nucleus of ejected substructures (clusters), to compare the probabilities of different configurations corresponding to different models, and, in the case of carbon, to compare the experimental energy spectrum with theoretical predictions. After a discussion of the theoretical expression of the cross-section of a quasi-elastic reaction, and a presentation of the different nuclear models which have been used for this reaction type, the author reports the study of the kinematics of these reactions by defining the conditions under which the knock-out mechanism is promoted. The author describes the beam, targets, detectors and electronic devices used for this study. He addresses the methods used to identify events and to analyse results. Experimental results are presented and compared with theoretical results and with other published experimental results.

    1. Fission of heavy nuclei: microscopic study of fission barriers and fragments angular momentum; Fission des noyaux lourds: etude microscopique des barrieres de fission et du moment angulaire des fragments

      Energy Technology Data Exchange (ETDEWEB)

      Bonneau, L

      2003-11-01

      A lot of experimental data on nuclear fission has been being collected for the last 65 years, allowing theoreticians to confront their models with reality. The first part of this work is dedicated to the computation of fission barriers. We have extended the HF + BCS (Hartree Fock + Bandeen-Cooper-Schrieffer) method in order to include a new set of polynomials on which wave functions can be broken to, more accurately than on Hermite's polynomials in the 2 fragment configuration. The fission barriers of 26 heavy nuclei from Thorium-230 to Nobelium-256 have been assessed and compared to experimental data, it appears that differences are no greater than 1 MeV. We have discovered a neat correlation between the variation of the experimental fission lifetimes of even Fermium isotopes and the computed heights of second barriers. Moreover our model reproduces the hyper-deformed well of Thorium-230 with a good agreement on the well depth. The second part deals with the scission region. We have performed Hartree-Fock calculations in order to explore different ways of fragmentation. We have shown that the harmonic oscillator gives a valid description of such ways. In order to compute the mean value of J{sup 2} in the fragments we have been driven to propose an adequate definition of that quantity consistent with the non-locality property of the J{sup 2} operator. (A.C.)

    2. Study of shell closures N=40 and N=50 in neutron-rich nuclei; Etude des fermetures de couches N=40 et N=50 dans les noyaux riches en neutrons

      Energy Technology Data Exchange (ETDEWEB)

      Perru, O

      2004-12-01

      For this thesis I have studied 2 neutron shell closures: N=40 and N=50. On N=50, an experiment was done in February 2001 on the ISOL line PARRNe, the issue was to measure the first excited states of {sup 83}Ge (Z=32, N=51) by studying the beta decay of {sup 83}Ga produced by fission of {sup 238}U.The extreme precision of the experimental device, with the operation of hot plasma ion sources made it possible to reach spectroscopic information of the Ge isotopes beyond the magic gap N=50. Two transitions have been attributed to {sup 83}Ge: at 867 keV and at 1238 keV. The level scheme of {sup 83}Ge could be interpreted in terms of weak coupling: the excited states of this nucleus are due to the couplings between the single neutron beyond N=50 and the remaining nucleons.On N=40, we wanted to determine the transition probability between ground state and first excited state, called B(E2), in {sup 70}Ni (N=42) and {sup 74}Zn (N=44) from Coulomb excitation. These exotic nuclei are produced by fragmentation of a primary beam of {sup 76}Ge on a target of {sup 58}Ni, selected by the spectrometer LISE, then interact with a secondary {sup 208}Pb target to induce the Coulomb excitation. At the end of this analysis, the following values have been obtained: B(E2,{sup 70}Ni)=860(170) e{sup 2}fm{sup 4}, B(E2,{sup 74}Zn)=1960(140) e{sup 2}fm{sup 4}. These values have been compared on the one hand to variational calculations which I have realised, on the other hand to published shell model calculations.These calculations point out the complex aspect of the Ni nuclei, which do not seem to have a typical behaviour of semi magic nuclei although they are located on a closed shell in protons (Z=28). (author)

    3. Fission of heavy nuclei: microscopic study of fission barriers and fragments angular momentum; Fission des noyaux lourds: etude microscopique des barrieres de fission et du moment angulaire des fragments

      Energy Technology Data Exchange (ETDEWEB)

      Bonneau, L

      2003-11-01

      A lot of experimental data on nuclear fission has been being collected for the last 65 years, allowing theoreticians to confront their models with reality. The first part of this work is dedicated to the computation of fission barriers. We have extended the HF + BCS (Hartree Fock + Bandeen-Cooper-Schrieffer) method in order to include a new set of polynomials on which wave functions can be broken to, more accurately than on Hermite's polynomials in the 2 fragment configuration. The fission barriers of 26 heavy nuclei from Thorium-230 to Nobelium-256 have been assessed and compared to experimental data, it appears that differences are no greater than 1 MeV. We have discovered a neat correlation between the variation of the experimental fission lifetimes of even Fermium isotopes and the computed heights of second barriers. Moreover our model reproduces the hyper-deformed well of Thorium-230 with a good agreement on the well depth. The second part deals with the scission region. We have performed Hartree-Fock calculations in order to explore different ways of fragmentation. We have shown that the harmonic oscillator gives a valid description of such ways. In order to compute the mean value of J{sup 2} in the fragments we have been driven to propose an adequate definition of that quantity consistent with the non-locality property of the J{sup 2} operator. (A.C.)

    4. New quantum mechanisms exhibited by superdeformed nuclei and their interpretations in terms of mean field and further; Nouveaux mecanismes quantiques manifestes par les noyaux superdeformes et leurs interpretations en terme de champ moyen et au-dela

      Energy Technology Data Exchange (ETDEWEB)

      El Aouad, N

      1994-06-01

      Identical superdeformed bands and quantized alignments have been investigated using the deformed Woods-Saxon mean field and a method of solving `exactly` the nuclear many-body problem with rotation. With the first formalism, an analysis method have been developed to find nucleonic configurations for bands in nuclei {sup 151}Tb, for the first three bands in nuclei {sup 149}Gd and for the bands in {sup 132}Ce. This method includes the calculation of incremental alignment which was performed for the first time. Such an approach allows to reproduce the experimental results and give an argument that the nuclear structure employed is correct. With the second formalism, it is shown that the deformed standard average-field plus pairing Hamiltonian with an induced rotation term employed for long time in literature, generates numerous twinned bands. The appearance of the twinned bands is shown to be often accompanied by the quantized incremental alignment. (author) 57 figs., 20 tabs., 66 refs.

    5. Study of the elastic scattering and of the (p,n) charge exchange reaction with neutron-rich light exotic beams; Etude de la diffusion elastique et de la reaction d`echange de charge (p,n) avec des faisceaux exotiques legers riches en neutrons

      Energy Technology Data Exchange (ETDEWEB)

      Cortina Gil, D.

      1996-07-05

      We have measured at GANIL, with the high resolution spectrometer SPEG, the elastic scattering of several neutron rich secondary beams ({sup 6}He, {sup 10}Be and {sup 11}Be) on a polypropylene target and the charge exchange reaction p({sup 6}He, {sup 6}Li)n. These exotic beams were produced by nuclear fragmentation and re-focalized with the SISSI device (superconducting solenoids). The signature of a halo structure in these nuclei has been analysed. Special attention has been paid to several aspects of the associated calculations namely, the proton and neutron density distributions and the small binding energy for the last nucleons in these exotic nuclei. Break-up mechanisms are seen to play an important role in these nuclei. 100 refs.

    6. Vers un modèle de surveillance intégrée des maladies exotiques abortives chez les bovins en France métropolitaine : évaluation de la surveillance évènementielle et exploration d’outils complémentaires de surveillance syndromique

      OpenAIRE

      Bronner , Anne

      2015-01-01

      The surveillance system for exotic abortive diseases in French cattle (i.e. abortive diseases that are not currently found in France), such as brucellosis, is a typical example of a surveillance system that is in need of improvement. This type of surveillance only actually exists for brucellosis. Clinical surveillance is the cornerstone of brucellosis surveillance and consists in the mandatory notification of each bovine abortion. However, while no quantitatively assessments have been made, i...

    7. Search for (exotic) strange matter in the Star and Alice experiments with the ultra-relativistic heavy ion colliders RHIC and LHC; Recherche de matiere etrange (exotique) dans les experiences STAR et ALICE aupres des collisionneurs d'ions lourds ultra-relativistes RHIC et LHC

      Energy Technology Data Exchange (ETDEWEB)

      Vernet, R

      2006-02-15

      Ultra-relativistic heavy ion collisions offer the possibility to create conditions of temperature and density that could lead nuclear matter to a state of deconfined partons, the quark-gluon plasma. Strange baryon production is one of the essential observables to understand the mechanisms involved in the medium. Furthermore, theories predict a possible production of strange dibaryons, still hypothetical particles, from which one could draw important inferences in nuclear physics and astrophysics. The experiments STAR at RHIC, and, soon, ALICE at LHC, allow one to search for strange baryons and dibaryons. The STAR sensitivity to the metastable dibaryon H{sup 0} in the {lambda}p{pi}{sup -} decay mode was calculated thanks to a dedicated simulation. The search for the H{sup 0}, and for the {xi}{sup -}p resonance as well, was performed in the STAR Au+Au data at {radical}(s{sub NN}) = 62.4 and 200 GeV energies. Within the framework of the preparation of ALICE to the first Pb+Pb data, the detector ability to identify strange baryons {lambda}, {xi} and {omega}, was estimated via several simulations. So as to favour the reconstruction efficiency in a large range of transverse momentum while keeping a reasonable S/B ratio, the influence of the geometrical selections and the size of the reconstruction zone was emphasized. The ALICE sensitivities to the metastable strange dibaryons H{sup 0} and ({xi}{sup 0}p){sub b} and to the {lambda}{lambda} resonance were calculated as well. (author)

    8. Relationship between the nuclear resonance of cobalt metal and its ferromagnetic properties; Relations entre la resonance nucleaire du cobalt metallique et ses proprietes ferromagnetiques

      Energy Technology Data Exchange (ETDEWEB)

      Aubrun, J.N. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

      1964-05-15

      resulte du couplage intense existant entre les noyaux et les electrons porteurs du magnetisme. Ces derniers excitent les noyaux et, dans les parois de Bloch, les soumettent a un champ radio-frequence bien plus intense que le champ RF applique. Les parametres de la resonance se determinent alors a partir du mouvement des parois, et dependent donc des constantes ferromagnetiques. La theorie permet de prevoir quantitativement certains effets particuliers, notamment par action d'un champ magnetique continu ou de la temperature. L'etude expeimentale a porte sur des poudres de cobalt et est en bon accord avec la theorie. Toutefois il faut tenir compte de l'effet de peau et reviser la theorie en consequence. Ceci permet d'expliquer certaines divergences observees, ainsi que l'influence de la taille des grains et celle du champ magnetique sur la forme de raie. Des renseignements originaux ont ete obtenus sur certaines proprietes purement ferromagnetiques du cobalt, en etudiant l'effet d'un champ magnetique et cette methode a pu etre appliquee a d'autres corps ferromagnetiques. En raison du caractere particulier de cette resonance nucleaire, qui se produit en l'absence de champ directeur et possede une importante largeur de raie, des spectrographes de type nouveau ont ete realises qui ont rendu possible des mesures precises de la forme de raie. La faible intensite des signaux obtenus dans certains cas a conduit a la mise au point d'une methode originale d'extraction dont la theorie et les applications pratiques sont donnees ici. L'ensemble de ces experiences fait apparaitre la resonance nucleaire comme un puissant moyen d'etude du ferromagnetique permettant de deceler des phenomenes microscopiques difficilement accessibles par les methodes classiques. (auteur)

    9. Relationship between the nuclear resonance of cobalt metal and its ferromagnetic properties; Relations entre la resonance nucleaire du cobalt metallique et ses proprietes ferromagnetiques

      Energy Technology Data Exchange (ETDEWEB)

      Aubrun, J N [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

      1964-05-15

      couplage intense existant entre les noyaux et les electrons porteurs du magnetisme. Ces derniers excitent les noyaux et, dans les parois de Bloch, les soumettent a un champ radio-frequence bien plus intense que le champ RF applique. Les parametres de la resonance se determinent alors a partir du mouvement des parois, et dependent donc des constantes ferromagnetiques. La theorie permet de prevoir quantitativement certains effets particuliers, notamment par action d'un champ magnetique continu ou de la temperature. L'etude expeimentale a porte sur des poudres de cobalt et est en bon accord avec la theorie. Toutefois il faut tenir compte de l'effet de peau et reviser la theorie en consequence. Ceci permet d'expliquer certaines divergences observees, ainsi que l'influence de la taille des grains et celle du champ magnetique sur la forme de raie. Des renseignements originaux ont ete obtenus sur certaines proprietes purement ferromagnetiques du cobalt, en etudiant l'effet d'un champ magnetique et cette methode a pu etre appliquee a d'autres corps ferromagnetiques. En raison du caractere particulier de cette resonance nucleaire, qui se produit en l'absence de champ directeur et possede une importante largeur de raie, des spectrographes de type nouveau ont ete realises qui ont rendu possible des mesures precises de la forme de raie. La faible intensite des signaux obtenus dans certains cas a conduit a la mise au point d'une methode originale d'extraction dont la theorie et les applications pratiques sont donnees ici. L'ensemble de ces experiences fait apparaitre la resonance nucleaire comme un puissant moyen d'etude du ferromagnetique permettant de deceler des phenomenes microscopiques difficilement accessibles par les methodes classiques. (auteur)

    10. Contribution to the study of nuclear structure using neutron total cross-section measurements between 400 and 1200 keV: isolated resonances and intermediate structure; Contribution a l'etude de la structure nucleaire par des mesures de sections efficaces neutroniques entre 400 keV et 1200 keV. Resonances isolees et structure intermediaire

      Energy Technology Data Exchange (ETDEWEB)

      Cabe, J [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

      1967-06-15

      The neutron total cross sections have been measured over the energy range 400 keV - 1200 keV for fluorine, aluminium, silicon, phosphorus, vanadium, chromium, manganese, iron, nickel, cobalt and lead with an energy spread of 3 keV. The neutrons were produced by the T (p,n) {sup 3}He reaction, the proton beam was supplied by a 2 MeV Van de Graaff. The structure in {sup 56}Fe has been studied in a more detailed way by measuring six angular distributions in the above range and the elastic scattering excitation curves at four angles. The measurements have made it possible to show the existence of the compound nucleus, as well as the presence of an intermediate structure in certain nuclei. (author) [French] Nous avons mesure les sections efficaces totales neutroniques entre 400 keV et 1200 keV du fluor, de l'aluminium, du silicium, du phosphore, du vanadium, du chrome, du manganese, du fer, du nickel, du cobalt et du plomb avec une dispersion en energie de 3 keV. Les neutrons etaient produits a l'aide de la reaction T (p,n) {sup 3}He, les protons etant acceleres par un Van de Graaff 2 MeV. Nous presentons de plus quatre courbes d'excitation de la diffusion elastique des neutrons sur le fer ainsi que six distributions angulaires. Ces mesures ont permis de mettre en evidence un certain nombres de resonances du noyau compose, ainsi que la presence d'une structure intermediaire dans. certains noyaux. (auteur)

    11. ecodistribution des tabanides, glossines et stomoxes le long d'un ...

      African Journals Online (AJOL)

      zinga

      humaine: sérologie IgG4 et PCR nichée. Bulletin de la Société de Pathologie. Exotique, 92: 167-170. Toure FS, Kassambara L, Williams T, Bain O,. Millet P. 1998. Human occult loasis: improvement in diagnostic sensitivity by the use of polymerase chain reaction. American Journal of Tropical Medecine and Hygiene, 59: ...

    12. Efectos de algunos reguladores en el crecimiento y desarrollo de mazorcas en Maíces Prolíficos y no Prolíficos

      Directory of Open Access Journals (Sweden)

      Jesús Norato Rodríguez

      1987-01-01

      and the formed ear shoots took place without a sígníficant increase of accumulated dry matter. It is possible to assume that the similar responses to different treatments are related to the modífícation that those treatments could have produced on the auxin content of the plant.

    13. Isopodes aselloïdes stygobies d’Espagne, III – Le genre Proasellus: B – espèces anophtalmes

      NARCIS (Netherlands)

      Henry, Jean-Paul; Magniez, Guy

      2003-01-01

      Stygobitic Isopoda Aselloidea from Spain, III – The genus Proasellus: B – Anophtalmous species. Study of anophtalmous and unpigmented Proasellus samples, collected in subterranean waters of Spain, mainly by J. Notenboom & I. Meijers (1983, 1984, 1985, 1986), N. Gourbault, F. Lescher-Moutoué & R.

    14. Association of Carboxylesterase 1 Gene (CES1) Polymorphism with Weight loss in Children with Attention Deficit Hyperactivity Disorder during Methylphenidate Treatment

      DEFF Research Database (Denmark)

      Oxenbøll, Maria; Kaalund-Jørgensen, Kristine; Rasmussen, Simone

      2017-01-01

      Children with Attention Deficit Hyperactivity Disorder (ADHD) show large variations in response to methylphenidate (MPH) treatment, which may result from genetic factors associated with MPH metabolism. We aimed at investigating a possible link between the -75 T>G polymorphism in the 5’ untranslated...

    15. Expresión de la hormona de crecimiento humano en cultivos de raíces aéreas de Brassica oleracea var. italica

      OpenAIRE

      Edgar García López; Octavio Gómez Gúzman; Emma Gloria Ramos-Ramírez; Armando Ariza-Castolo; Josefina Pérez-Vargas; Graciano Calva Calva

      2010-01-01

      Debido al crecimiento de la población humana mundial, las compañías farmacéuticas enfrentan una creciente demanda de proteínas terapéuticas, como anticuerpos, enzimas y hormonas; no obstante, las instalaciones y tecnologías existentes, como los cultivos de células animales y bacterianos pueden no resultar suficientes para cubrir esa demanda. Una alternativa es la utilización de la biotecnología vegetal para producir proteínas heterólogas. En este trabajo se presentan resultados del estudio de...

    16. Transfert de nickel, de cuivre et de zinc lors de la manipulation de pièces de monnaie : le cas du dirham marocain

      Science.gov (United States)

      Fournier, Paul-Guy; Nourtier, Alain; Monkade, Mohammed; Berrada, Khalid; Boughaleb, Hichame; Outzourhit, Abdelkader; Pichon, Rémy; Haut, Christian; Govers, Thomas

      2006-03-01

      When the euro was introduced, the fact that some coins contain nickel, which is known to be an allergen, gave rise to controversy. More generally, this raises the question of metal transfer from coins to skin. Morocco has used for decades one-dirham coins made of pure or alloyed nickel. Studying their wear, the labile metal on their surface and the transfer to fingers in handling may therefore be especially instructive. Weighing statistics for a sample of 401 coins confirm that cupronickel coins wear out more quickly than pure nickel coins and reveal that the dirham suffers a much stronger wear than other currencies for which wear statistics are available. SEM studies supplemented by ICP quantitative analyses show that the labile metal is mainly made up of chips, even after many handlings. These chips are often cupronickel, even on pure nickel coins, which shows that they are produced by the friction of coins against one another. Secondly, the surface of coins presents sweat residue with an important proportion of copper and a little nickel, which confirms that sweat dissolves surface copper. Depending on the alloy and date, coins have between 20 and 140 μg of labile copper and nickel, with a content of one quarter of nickel on cupronickel coins and about one half on pure nickel coins. The most worn cupronickel coins are the coins that present the largest amount of labile metal, and even labile nickel. In our experiments, the metal transfer to fingers when a cupronickel coin is handled for the first time represents between 4 and 9% of the labile metal and 0.05% of the annual wear. A simple and reliable test of nickel contamination consists in measuring the labile nickel. To cite this article: P.-G. Fournier et al., C. R. Physique 7 (2006).

    17. Raíces en el exilio: asentamiento (a)temporal para refugiados de la guerra siria: campo de Za'atari, Jordania

      OpenAIRE

      Fernández Cortés, Marta

      2016-01-01

      Qualificació obtinguda: 10 Matrícula d'honor A raíz del inicio de la guerra de Siria en el año 2011, millones de personas han tenido que huir de sus casas y buscar refugio en otros lugares. Una gran parte de ellos han ido a parar a campos de refugiados, territorios sin ley donde las condiciones de vida son muy precarias, y sus habitantes han perdido muchos de sus derechos y dignidad. Este proyecto se centra en Za’atari, uno de los numerosos campos de refugiados que han surgido a partir...

    18. El nuevo debate sobre el populismo y sus raíces en la transición democrática: el caso argentino

      Directory of Open Access Journals (Sweden)

      Gerardo Aboy Carlés

      2014-12-01

      Full Text Available This paper examines the concerns which have led to the new wave of studies on populism in Argentina, focusing more on the debate surrounding the establishment of a new institutional framework typical of the 1980s than on the proliferation of 21st-century popular governments in South America. The typical characteristics and problems encountered in these studies are explained, and the defining features of the populist experience in 20th-century Argentina are analyzed by drawing comparisons with other populist processes in the region. Finally, the paper analyzes how certain features persist in the new political order, while others have gone through complete transformations since it was established in 1983.

    19. Ces silences de la narration qui rapprochèrent Jean Giono et Juan Ramón Jiménez

      Directory of Open Access Journals (Sweden)

      Dominique Bonnet

      2010-01-01

      Full Text Available This article intends to show how JeanGiono discovered a purity of writing inJuan Ramón Jiménez that he practicedhimself in his elliptical narratives. Thus,this purifying desire that both sought intheir writings would be one of the commonpoints that would persuade Jean Giono todo the film adaptation of Platero y yo.

    20. Diversidad genética y patogénica de Sclerotium rofsii Sacc. como factor determinante de epidemias de podredumbre de raíces

      OpenAIRE

      Remesal González, Efrén

      2012-01-01

      Las epidemias causadas por el hongo de suelo Sclerotium rolfsii en numerosos cultivos agrícolas de interés económico siguen siendo de las de más difícil manejo, constituyendo aún, por tanto, un importante reto para los fitopatólogos. La dificultad de su manejo está motivada por diversas características de este patógeno, que incluyen el inusual rango de plantas huésped, su amplia distribución en suelos agrícolas a nivel mundial, su poderoso mecanismo de patogénesis con la pro...

    1. Eficacia del parto por cesárea comparado con parto vaginal en gestantes con preeclampsia severa según complicaciones maternas y neonatales

      OpenAIRE

      Salazar Cruzado, Orlando Rodolfo

      2010-01-01

      An ex post facto study was done at Belen Hospital Obstetrics Service between January and December 2009 to compare the effectiveness of cesarean and vaginal delivery in pregnant women with severe preeclampsia according to maternal and neonatal complications. The study was made with 218 pregnant women with severe preeclampsia from which 167 had cesarean deliveries and 51 vaginal ones. Both groups were compared according to their demographic and obstetric characteristics, having more incidences ...

    2. Pneumoperitônio pós-cesárea: relato de caso Pneumoperitoneum after cesarean section: a case report

      OpenAIRE

      Melania Maria Ramos de Amorim; Fernando Antônio Campelo Spencer Netto; Luiz Carlos Santos; Everaldo Mascarenhas; Leila Katz

      1998-01-01

      A associação de pneumoperitônio, dor abdominal e íleo paralítico no período pós-operatório relaciona-se, na maioria dos casos, à perfuração de vísceras ocas. Os autores apresentam um caso de pós-operatório de cesariana por DPPNI em que a paciente evoluiu com importante distensão e dor abdominal. Realizada radiografia de tórax e abdome evidenciou-se importante dilatação das alças de intestino grosso e delgado e pneumoperitônio, foi submetida a laparotomia exploradora com a hipótese diagnóstica...

    3. Oclusión temporal de arterias ilíacas internas en cesárea-histerectomía por placenta acreta: enfoque multidisciplinario

      OpenAIRE

      Hasbun H, Jorge; Palaviccini R, Jaime; Osorio P, Raúl; Cerda SM, Sergio; Castro L, Magdalena; Carreño T, Laura; Valdevenito S, Raúl

      2012-01-01

      Objetivo: Evaluar la eficacia y resultados del tratamiento de la placenta acreta previa central en un caso clínico. Durante el embarazo los métodos diagnósticos por imágenes (ultrasonido y resonancia nuclear magnética) precisaron la localización y penetración de la placenta en la pared uterina. En el período inmediato antes del parto, para disminuir la hemorragia, evitar la hipotensión materna y facilitar el procedimiento quirúrgico, se colocaron balones intraarteriales en ambas ilíacas inter...

    4. Measuring somatic symptoms with the CES-D to assess depression in cancer patients after treatment : Comparison among patients with oral/oropharyngeal, gynecological, colorectal, and breast cancer

      NARCIS (Netherlands)

      van Wilgen, C.P.; Dijkstra, P.U.; Stewart, R.E.; Ranchor, A.V.; Roodenburg, J.L.N.

      2006-01-01

      There is a high prevalence of depression after cancer treatment. In the literature, several authors have raised questions about assessing somatic symptoms to explore depression after cancer treatment. These somatic sequelae are a consequence of cancer treatment and should cause higher depression

    5. Evaluation of caregiver-friendly workplace policy (CFWPs interventions on the health of full-time caregiver employees (CEs: implementation and cost-benefit analysis

      Directory of Open Access Journals (Sweden)

      Allison M. Williams

      2017-09-01

      Full Text Available Abstract Background Current Canadian evidence illustrating the health benefits and cost-effectiveness of caregiver-friendly workplace policies is needed if Canadian employers are to adopt and integrate caregiver-friendly workplace policies into their employment practices. The goal of this three-year, three study research project is to provide such evidence for the auto manufacturing and educational services sectors. The research questions being addressed are: What are the impacts for employers (economic and workers (health of caregiver-friendly workplace policy intervention(s for full-time caregiver-employees? What are the impacts for employers, workers and society of the caregiver-friendly workplace policy intervention(s in each participating workplace? What contextual factors impact the successful implementation of caregiver-friendly workplace policy intervention(s? Methods Using a pre-post-test comparative case study design, Study A will determine the effectiveness of newly implemented caregiver-friendly workplace policy intervention(s across two workplaces to determine impacts on caregiver-employee health. A quasi-experimental pre-post design will allow the caregiver-friendly workplace policy intervention(s to be tested with respect to potential impacts on health, and specifically on caregiver employee mental, psychosocial, and physical health. Framed within a comparative case study design, Study B will utilize cost-benefit and cost-effectiveness analysis approaches to evaluate the economic impacts of the caregiver-friendly workplace policy intervention(s for each of the two participating workplaces. Framed within a comparative case study design, Study C will undertake an implementation analysis of the caregiver-friendly workplace policy intervention(s in each participating workplace in order to determine: the degree of support for the intervention(s (reflected in the workplace culture; how sex and gender are implicated; co-workers’ responses to the chosen intervention(s, and; other nuances at play. It is hypothesized that the benefits of the caregiver-friendly workplace policy intervention(s will include improvements in caregiver-employees’ mental, psychosocial and physical health, as well as evidence of cost-benefit and cost-effectiveness for the employer. Discussion The expected project results will provide the research evidence for extensive knowledge translation work, to be carried out in collaboration with our knowledge transition partners, to the employer/human resources and occupational health/safety target populations. Trial registration ISRCTN16187974 Registered August 25, 2016.

    6. Evaluation of caregiver-friendly workplace policy (CFWPs) interventions on the health of full-time caregiver employees (CEs): implementation and cost-benefit analysis

      OpenAIRE

      Williams, Allison M.; Tompa, Emile; Lero, Donna S.; Fast, Janet; Yazdani, Amin; Zeytinoglu, Isik U.

      2017-01-01

      Background Current Canadian evidence illustrating the health benefits and cost-effectiveness of caregiver-friendly workplace policies is needed if Canadian employers are to adopt and integrate caregiver-friendly workplace policies into their employment practices. The goal of this three-year, three study research project is to provide such evidence for the auto manufacturing and educational services sectors. The research questions being addressed are: What are the impacts for employers (econom...

    7. Not saying I am happy does not mean I am not: cultural influences on responses to positive affect items in the CES-D.

      Science.gov (United States)

      Jang, Yuri; Kwag, Kyung Hwa; Chiriboga, David A

      2010-11-01

      Given the emphasis on modesty and self-effacement in Asian societies, the present study explored differential item responses for 2 positive affect items (5 = Hopeful and 8 = Happy) on a short form of the Center for Epidemiologic Studies-Depression scale. The samples consisted of elderly non-Hispanic Whites (n = 450), Korean Americans (n = 519), and Koreans (n = 2,030). Multiple Indicator Multiple Cause models were estimated to identify the impact of group membership on responses to the positive affect items while controlling for the latent trait of depressive symptoms. The data revealed that Koreans and Korean Americans were less likely than non-Hispanic Whites to endorse the positive affect items. Compared with Korean Americans who were more acculturated to mainstream American culture, those who were less acculturated were less likely to endorse the positive affect items. Our findings support the notion that the way in which people endorse depressive symptoms is substantially influenced by cultural orientation. These findings call into question the common use of simple mean comparisons and a universal cutoff point across diverse cultural groups.

    8. Investigating the impact of missense mutations in hCES1 by in silico structure-based approaches

      DEFF Research Database (Denmark)

      Nzabonimpa, Grace Shema; Rasmussen, Henrik Berg; Brunak, Søren

      2016-01-01

      Genetic variations in drug-metabolizing enzymes have been reported to influence pharmacokinetics, drug dosage and other aspects that affect therapeutic outcomes. Most particularly, non-synonymous single-nucleotide polymorphisms (nsSNPs) resulting in amino acid changes disrupt potential functional...

    9. Génomique comparative et évolutive au sein du complexe d’espèces Leptosphaeria maculans-Leptosphaeria biglobosa

      OpenAIRE

      Grandaubert , Jonathan

      2013-01-01

      Leptosphaeria maculans ‘brassicae’ (Lmb) is a filamentous ascomycete from class Dothideomycetes. It belongs to the Leptosphaeria maculans-Leptosphaeria biglobosa species complex which comprises pathogens of crucifers. Lmb is specifically adapted to oilseed rape (Brassica napus) and is responsible for the most damaging disease of this crop: “stem canker”. In order to better understand and control the disease, the host team initiated a genomic project aiming at systematically identify genes inv...

    10. Lingots et couteaux en fer d'Alésia. Études archéométriques de pièces inédites

      Czech Academy of Sciences Publication Activity Database

      Pleiner, Radomír; Fluzin, P.; Mangin, M.; Billon, M.; Dillmann, P.; Vega, E.; Rabeisen, E.

      2003-01-01

      Roč. 52, - (2003), s. 91-130 ISSN 1266-7706 Institutional research plan: CEZ:AV0Z8002910 Keywords : lingots * knives * metallography * oppidum * Alésia Subject RIV: AC - Archeology, Anthropology, Ethnology

    11. Algoritmo de optimización para el cálculo de múltiples raíces de sistemas de ecuaciones no lineales

      Directory of Open Access Journals (Sweden)

      Jorge Cruz Duarte

      2013-01-01

      Full Text Available En este artículo se presenta una estrategia novedosa para la búsqueda de múltiples soluciones en sistemas de ecuaciones no lineales, mediante la metaheurística de optimización por enjambre de partículas, y su versión unificada. Inicialmente, se expone una sección de fundamentos, donde se muestran las bases de las técnicas numéricas utilizadas y también la transformación del problema de solución en uno de optimización. Se comprueba esta nueva estrategia con diferentes tipos de sistemas, variando sistemáticamente el tamaño de los mismos para observar el comportamiento de las metaheurísticas usadas. Luego de analizar los datos obtenidos, se encuentra que la estrategia implementada tiene un gran potencial de aplicación en problemas de ingeniería. Para los sistemas analizados en este escrito, se recomienda utilizar la versión unificada o la original, dependiendo de si el sistema es pequeño o grande (menor o mayor a cinco ecuaciones e incógnitas, respectivamente.

    12. Evaluation of caregiver-friendly workplace policy (CFWPs) interventions on the health of full-time caregiver employees (CEs): implementation and cost-benefit analysis.

      Science.gov (United States)

      Williams, Allison M; Tompa, Emile; Lero, Donna S; Fast, Janet; Yazdani, Amin; Zeytinoglu, Isik U

      2017-09-20

      Current Canadian evidence illustrating the health benefits and cost-effectiveness of caregiver-friendly workplace policies is needed if Canadian employers are to adopt and integrate caregiver-friendly workplace policies into their employment practices. The goal of this three-year, three study research project is to provide such evidence for the auto manufacturing and educational services sectors. The research questions being addressed are: What are the impacts for employers (economic) and workers (health) of caregiver-friendly workplace policy intervention(s) for full-time caregiver-employees? What are the impacts for employers, workers and society of the caregiver-friendly workplace policy intervention(s) in each participating workplace? What contextual factors impact the successful implementation of caregiver-friendly workplace policy intervention(s)? Using a pre-post-test comparative case study design, Study A will determine the effectiveness of newly implemented caregiver-friendly workplace policy intervention(s) across two workplaces to determine impacts on caregiver-employee health. A quasi-experimental pre-post design will allow the caregiver-friendly workplace policy intervention(s) to be tested with respect to potential impacts on health, and specifically on caregiver employee mental, psychosocial, and physical health. Framed within a comparative case study design, Study B will utilize cost-benefit and cost-effectiveness analysis approaches to evaluate the economic impacts of the caregiver-friendly workplace policy intervention(s) for each of the two participating workplaces. Framed within a comparative case study design, Study C will undertake an implementation analysis of the caregiver-friendly workplace policy intervention(s) in each participating workplace in order to determine: the degree of support for the intervention(s) (reflected in the workplace culture); how sex and gender are implicated; co-workers' responses to the chosen intervention(s), and; other nuances at play. It is hypothesized that the benefits of the caregiver-friendly workplace policy intervention(s) will include improvements in caregiver-employees' mental, psychosocial and physical health, as well as evidence of cost-benefit and cost-effectiveness for the employer. The expected project results will provide the research evidence for extensive knowledge translation work, to be carried out in collaboration with our knowledge transition partners, to the employer/human resources and occupational health/safety target populations. ISRCTN16187974 Registered August 25, 2016.

    13. Monitoramento não invasivo baseado na biorreatância revela instabilidade hemodinâmica significativa durante cesárea eletiva sob raquianestesia

      Directory of Open Access Journals (Sweden)

      Anne Doherty

      2011-06-01

      Full Text Available JUSTIFICATIVA E OBJETIVOS: O monitoramento da pressão arterial oferece uma compreensão limitada das consequências hemodinâmicas da raquianestesia para cesariana. O objetivo deste estudo foi avaliar, com o auxílio do monitor de débito cardíaco não invasivo baseado na biorreatância, as alterações hemodinâmicas durante cesariana eletiva sob raquianestesia, na qual doses intermitentes de fenilefrina foram utilizados para prevenir e tratar a hipotensão. MÉTODOS: Este estudo observacional foi realizado após aprovação da comissão de ética na pesquisa e assinatura do consentimento informado. Pacientes saudáveis marcadas para cesariana eletiva sob raquianestesia foram avaliadas. Doses intermitentes de fenilefrina foram administrados para manter a pressão arterial sistólica nos níveis basais e as pacientes foram avaliadas com o monitor de débito cardíaco não invasivo baseado na biorreatância. Os dados hemodinâmicos foram colhidos continuamente no momento basal e durante os períodos pós-raquianestesia e pós-nascimento do feto. Os dados foram analisados usando ANOVA para modelos mistos e um p < 0,05 foi considerado significativo. RESULTADOS: A pressão arterial sistólica foi mantida entre 79,2% ± 14,2 e 105,9% ± 10,0 dos valores basais durante o período pós-raquianestesia e 78,4% ± 11,13 e 100,9% ± 10,7 dos valores basais no período pós-nascimento do feto (média ± DP. Flutuações significativas foram observadas na pressão arterial sistólica, frequência cardíaca e débito cardíaco no período pós-nascimento. CONCLUSÕES: Um novo monitor não invasivo, baseado na biorreatância, revelou flutuações hemodinâmicas significativas durante a cesariana sob raquianestesia, a despeito das tentativas de manter a pressão arterial nos níveis basais com doses intermitentes de fenilefrina.

    14. Acción de las olas sobre comunidades epibentónicas asociadas a raíces de Rhizophora mangle (Linnaeus

      Directory of Open Access Journals (Sweden)

      Federico Villalobos Rujeles

      2007-08-01

      intermedio. Se examinó experimentalmente la sucesión haciendo énfasis en el reemplazo direccional de especies. Se presentan las características de las comunidades en sitios con alto y bajo oleaje.

    15. La mise en spectacle de la mort dans deux pièces du théâtre espagnol du Siècle d’Or

      Directory of Open Access Journals (Sweden)

      Odile Lasserre Dempure

      2012-08-01

      Full Text Available Dans Fuente Ovejuna (1613 de Lope de Vega et La serrana de la Vera (1613 de Luis Vélez de Guevara, la mort est spectacle. Cette mise en spectacle de la mort, qui doit être replacée dans le contexte d’une esthétique macabre caractéristique de la période baroque, s’articule sur de multiples réseaux de sens dont nous tentons de dégager quelques lignes directrices. Une lecture attentive de la façon dont la mort et le cadavre sont mis en scène permet de comprendre que pour l’imaginaire de l’époque, cette mise en spectacle de la mort est surtout mise en spectacle de la vie. La mort, effroyable mais bienfaisante, est une mort génératrice de vie.En Fuente Ovejuna (1613, de Lope de Vega, y en La Serrana de la Vera (1613, de Luis Vélez de Guevara, la muerte es un espectáculo. Esta representación de la muerte, que debe ser situada en el contexto de una estética macabra propia al barroco, adquiere múltiples significados que trataremos de determinar y poner en relieve. Una lectura atenta de la manera cómo la muerte y el cadáver son expuestos, nos permite deducir que para el imaginario de la época esta representación de la muerte es más que nada una representación de la vida. La muerte, espantosa pero benéfica, es una muerte generadora de vida.

    16. Stochastic curtailment of questionnaires for three-level classification: Shortening the CES-D for assessing low, moderate, and high risk of depression

      NARCIS (Netherlands)

      Smits, N.; Finkelman, M.D.; Kelderman, H.

      2016-01-01

      In clinical assessment, efficient screeners are needed to ensure low respondent burden. In this article, Stochastic Curtailment (SC), a method for efficient computerized testing for classification into two classes for observable outcomes, was extended to three classes. In a post hoc simulation study

    17. Origine des levures assurant l'élaboration d'un vin blanc de Touraine. Identification des espèces

      Directory of Open Access Journals (Sweden)

      Claude Cuinier

      1980-06-01

      The author isolates and identifies yeast varieties from the grape and its products (must, wine as well as from the major contamination areas (vine, winery. It is shown that alcoholic fermentation is for the most part carried out by Sacch. cerevisae and other Saccharomyces s.p., all were isolated at the vineyard and a few within the winery.

    18. La aceptación de la teoría marginalista: sus raíces en la ideología moderna

      Directory of Open Access Journals (Sweden)

      Leal Claudia

      1995-12-01

      Full Text Available Las últimas décadas del siglo pasado fueron bastantes agitadas para la historia de la teoría económica. En Inglaterra, centro del universo económico, la teoría clásica cumplía cien años de dominio y ya se le veían sus achaques, aunque éstos no predecían su muerte. Recibía numerosas críticas, muchas inspiradas en el clima romántico de aquellos días. Se culpaba a la economía política de ser inhumana, fría y calculadora, pero la joven ciencia hacía caso omiso de las habladurías y las tildaba de sentimentalistas y carentes de fundamento. También se criticaba su tendencia a elaborar análisis cada vez más abstractos, a imitación de las ciencias naturales y exactas, reflejada en el predominio de la teoría ricardiana, cuyo método hace énfasis en la consistencia lógica de la teoría y la separa de su contenido histórico, sociológico y moral.

    19. Effet de la salinité sur la fluorescence chlorophyllienne, la teneur en proline et la production florale de trois espèces ornementales

      Directory of Open Access Journals (Sweden)

      Mathlouthi, M.

      2005-01-01

      Full Text Available Effect of Chloride Sodium on Chlorophyll Fluorescence, Plant Proline Content and Flowers Production of Three Ornamental Species. Three ornamental species (Zinnia elegans, Tagetes patula and Petunia hybrida were used to test sodium chloride effect on chlorophyll fluorescence, plant proline content and flowers production. Three treatments were used in this trial: 0, 2 and 4 g of Nacl.l-1 of irrigation water. The results showed that chlorophyll fluorescence was not affected by sodium chloride treatment but plant proline content increased and flowers production decreased as NaCl doses increase.

    20. Raíces históricas, sociales y epidemiológicas de la tuberculosis en Bogotá, Colombia.

      Directory of Open Access Journals (Sweden)

      Alvaro Javier Idrovo

      2004-12-01

      Full Text Available El entendimiento completo de la dinámica epidemiológica actual de la tuberculosis en una sociedad requiere una aproximación holística. En este artículo se resume el comportamiento de la tuberculosis en Bogotá, Colombia, a través del tiempo. En periodos prehispánicos, la frecuencia de la enfermedad fue baja. Durante la Conquista y la Colonia se observó un incremento moderado de la tuberculosis pulmonar y abdominal. Hacia 1870 se inició un acentuado incremento de los casos de tuberculosis pulmonar, asociado con el proceso acelerado de la urbanización de la ciudad. Desde la segunda década del siglo XX, la tuberculosis pulmonar se convirtió en una enfermedad endémica. Después de 1920, la frecuencia fue relativamente estable hasta la década del 70, cuando se presentó un descenso; sin embargo, en los últimos años volvió a aparecer un aumento en el número de casos. La presencia de la tuberculosis en cada periodo se asocia con eventos sociales y ambientales.

    1. Ecologie et gestion des espèces multi-usages du genre Erythrophleum (Fabaceae-Caesalpinioideae en Afrique (synthèse bibliographique

      Directory of Open Access Journals (Sweden)

      Gorel, AP.

      2015-01-01

      Full Text Available Ecology and management of the multipurpose Erythrophleum species (Fabaceae-Caesalpinioideae in Africa. A review. Introduction. Widespread in Africa, the Erythrophleum genus includes four tropical tree species with a high economic and socio-cultural value: Erythrophleum ivorense, Erythrophleum suaveolens, Erythrophleum africanum and Erythrophleum lasianthum. Appropriate knowledge of the ecology and the distribution of these species is required for their sustainable management. This paper is based on an extensive literature review and summarizes the available information on the African Erythrophleum species in terms of botany, phylogeography, ecology, forestry and ethnobotany. Literature. Erythrophleum ivorense, E. suaveolens, E. africanum and E. lasianthum are morphologically different and occur in distinct climatic areas. They are non-pioneer light demander (E. ivorense and E. suaveolens or pioneer species (E. africanum. Their primary mode of dispersal is via ballochore. The seeds have a dormancy period and can remain in the soil for several years. Their reproductive and foliar phenologies are regular and annual. Growth rate varies between species, ranging from 0.65 cm per year for E. ivorense to 0.16 cm per year for E. africanum. These trees are used in traditional medicine. Only E. ivorense and E. suaveolens (Tali are mainly logged for timber. Conclusions. Erythrophleum species ecological data are better informed for E. ivorense and E. suaveolens because of their economic importance. This review highlights the existing lack of knowledge regarding the phenology (effects of climate, fructification periods, the minimum diameter of fructification and the mechanisms of natural seed dormancy breakage. Targeting such weaknesses is required to create or re-evaluate methods of conservation and/or enhancement of populations and logging practices.

    2. Adaptabilité des espèces du genre Atriplex aux conditions de salinité et d'aridité

      OpenAIRE

      Belkheiri, Oumelkheir

      2009-01-01

      Plants have had to cope with periodic, unpredictable environmental stresses during growth and development. Surviving such stresses over a long evolutionary scale led plants to acquire mechanisms allowing them to sensitively perceive stresses and regulate their physiology accordingly. In the arid and semi arid regions of the world, shrubs surviving in saline soils have been the subject of considerable research. They have been evaluated as alternative sources of forage for liv...

    3. Establishing a common metric for depressive symptoms: linking the BDI-II, CES-D, and PHQ-9 to PROMIS depression.

      Science.gov (United States)

      Choi, Seung W; Schalet, Benjamin; Cook, Karon F; Cella, David

      2014-06-01

      Interest in measuring patient-reported outcomes has increased dramatically in recent decades. This has simultaneously produced numerous assessment options and confusion. In the case of depressive symptoms, there are many commonly used options for measuring the same or a very similar concept. Public and professional reporting of scores can be confused by multiple scale ranges, normative levels, and clinical thresholds. A common reporting metric would have great value and can be achieved when similar instruments are administered to a single sample and then linked to each other to produce cross-walk score tables (e.g., Dorans, 2007; Kolen & Brennan, 2004). Using multiple procedures based on item response theory and equipercentile methods, we produced cross-walk tables linking 3 popular "legacy" depression instruments-the Center for Epidemiologic Studies Depression Scale (Radloff, 1977; N = 747), the Beck Depression Inventory-II (Beck, Steer, & Brown, 1996; N = 748), and the 9-item Patient Health Questionnaire (Kroenke, Spitzer, & Williams, 2001; N = 1,120)-to the depression metric of the National Institutes of Health (NIH) Patient-Reported Outcomes Measurement Information System (PROMIS; Cella et al., 2010). The PROMIS Depression metric is centered on the U.S. general population, matching the marginal distributions of gender, age, race, and education in the 2000 U.S. census (Liu et al., 2010). The linking relationships were evaluated by resampling small subsets and estimating confidence intervals for the differences between the observed and linked PROMIS scores; in addition, PROMIS cutoff scores for depression severity were estimated to correspond with those commonly used with the legacy measures. Our results allow clinicians and researchers to retrofit existing data of 3 popular depression measures to the PROMIS Depression metric and vice versa.

    4. Radiotherapy for testicular seminoma: changes over the past 10 years; Radiotherapie des seminomes testiculaires: ce qui a change ces dix dernieres annees

      Energy Technology Data Exchange (ETDEWEB)

      Mirimanoff, R.O. [Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne (Switzerland)

      2003-11-01

      The STIC 2001 and STIC 2002 projects intend to allow the implementation and the assessment of Intensity Modulated Radiation Therapy in France. IMRT is an innovative technique in which the high-dose radiation volume conforms to an accurately defined target volume with less morbidity to the surrounding normal tissues. The main medical objectives of the projects are (1) to improve the therapeutic index while decreasing acute toxicity and late sequelae (mainly xerostomia and acute mucite for head and neck tumors), which allows an increase in the radiation dose to the tumor and then a better tumor control; (2) to propose a salvage treatment to patients who locally recurred in previously irradiated sites; (3) to determine the optimal treatment guidelines for a safe use of the technique in clinical routine. Our projects also aim at comparing IMRT and 3D conformal treatments on the one hand (STIC 2001), and IMRT and conventional treatments on the other hand (STIC 2002), with regard to costs. As a matter of fact, the use of IMRT is presently limited in France because its implementation requires high investment and personnel costs. The seventeen French Regional Cancer Centres involved in the two projects intend to study the additional cost of the use IMRT in comparison with the use of standard techniques, which appears to be a step for a wide use of this technique in France. Each of the studies is two-year prospective, and includes patients with head and neck tumors treated with a curative intend (post operative or exclusive treatments for STIC 2002 and STIC 2002), and patients with a prostate cancer (STIC 2001). (author)

    5. Manipulation coherente de qubits de spin dans une boite quantique triple

      Science.gov (United States)

      Gaudreau, Louis

      Nous presentons dans cette these une etude detaillee du moment magnetique intrinseque de l'electron, i.e. le spin electronique, incluant la manipulation quantique coherente des etats de spin de trois electrons couples. A cette fin, nous utilisons des boites quantiques laterales pour confiner les electrons. Ces nano-structures, d'une grandeur autour de 1 pm, permettent de confiner un nombre precis d'electrons de facon controlee, allant jusqu'a zero electrons. Les developpements technologiques et d'ingeniosite durant la derniere decennie ont permis de coupler trois boites quantiques, ainsi l'interaction entre plusieurs electrons confines peut etre controlee comme par exemple le couplage quantique tunnel et l'interaction d'echange entre les spins de chacun d'entre eux. A l'aide de boites quantiques couplees, il est possible de realiser des experiences dans plusieurs domaines de la physique moderne : les etats up et down du spin des electrons confines peuvent etre utilisees comme etats quantiques binaires (qubits) dans le domaine de l'informatique quantique, la non-localite quantique peut etre testee en separant spatialement deux electrons enchevetres, il est possible de creer des 'courants de spin enchevetres' utiles en spintronique, et bien d'autres. La manipulation coherente des etats de spin du systeme a trois electrons se fait de facon purement electrique grace a des pulses a haute frequence qui permettent d'augmenter le couplage entre les electrons et de faire la mesure de l'etat resultant apres la manipulation. Nous utilisons l'interaction hyperfine entre les spins des electrons et ceux des noyaux du cristal dans lequel ils resident pour creer les rotations quantiques entre les etats, notamment les etats |Q +3/2> et (D+1/2>. Les resultats obtenus indiquent un temps de coherence de l'ordre de 10 ns. Ces experiences demontrent un niveau de controle sans precedant de boites quantiques triples et pavent la voie vers des nano-structures plus sophistiquees dans

    6. On the solution of a few problems of multiple scattering by Monte Carlo method; Sur la solution de quelques problemes de diffusions multiples par la methode de Monte-Carlo

      Energy Technology Data Exchange (ETDEWEB)

      Bluet, J C [Commissariat a l' Energie Atomique, Cadarache (France)

      1966-02-01

      isotrope. 3.- La particule ne perd pas d'energie au cours des collisions successives. Ces hypotheses sont justifiees par les materiaux et les gammes d'energie etudies. 1er probleme: une cible de sodium de geometrie donnee est soumise a un flux de neutrons. Certains noyaux sont actives. L'activation est ensuite mesuree par un cristal au iodure de sodium. La methode de Monte-Carlo permet de calculer la distribution des noyaux actives dans l'echantillon en tenant compte des diffusions et l'efficacite du compteur. Un disque en verre au Li{sup 6} est soumis a un flux de neutrons perpendiculaire a ses faces planes. Si l'epaisseur du verre n'est pas negligeable devant le libre parcours de diffusion {lambda}, il y aura des collisions et le parcours moyen e' d'un neutron dans le verre sera different de l'epaisseur. e' est calcule par la methode de Monte-Carlo. On en tire une correction relative d'efficacite egale a (e' - e)/ e. 3eme probleme: un detecteur de neutrons est place au fond d'un cylindre entoure d'eau. Un flux de neutrons provient d'une source placee sur l'axe, en avant de la protection; on calcule le rapport du nombre de neutrons allant directement de la source au detecteur au nombre de neutrons faisant un trajet non direct avec des collisions dans l'eau. Pour les trois problemes on donne les resultats trouves pour quelques cas concrets tels qu'ils se sont poses experimentalement, et des courbes plus generales ou on utilise des variables reduites comme le rapport libre parcours/dimension geometrique ou son inverse. On donne egalement les listes d'instructions des programmes, avec les organigrammes complets et les tableaux de correspondances entre symboles. (auteur)

    7. Competition entre supraconductivite et magnetisme au voisinage de la transition de Mott dans le conducteur organique quasi-bidimensionnel k-(BEDT-TTF)2copper[N(CN)2]bromine

      Science.gov (United States)

      Fournier, David

      Les conducteurs organiques quasi-bidimensionnels kappa-ET2X presentent d'importantes similitudes avec les SCHT telles qu'une phase isolant de Mott, un regime de pseudogap et un etat supraconducteur. L'etude de leurs proprietes apparait donc complementaire. Parmi les interrogations persistantes concernant la physique de ces systemes, l'origine du (ou des) processus exotique d'appariement, responsable de la supraconductivite est le sujet suscitant l'interet le plus marque dans la communaute. L'hypothese d'un mecanisme lie a la proximite d'un etat antiferromagnetique est privilegiee. Une etape importante dans la resolution de cette problematique est l'identification de la symetrie du parametre d'ordre. D'apres de nombreux travaux sur les systemes fortement correles, la sonde ultrasonore, de par sa sensibilite aux excitations de quasiparticule a basse temperature, est consideree comme particulierement adaptee a l'etude de cette propriete. Cependant, son emploi necessite l'utilisation d'un compose metallique a basse temperature et completement supraconducteur. Le compose metallique organique kappa-ET 2Cu[N(CN)2]Br presente toutes les caracteristiques necessaires a l'etude de cette propriete. En effet, il est situe loin de la transition du premier ordre de Mott et est completement supraconducteur. De facon surprenante, ce systeme semble se coupler fortement avec le reseau ce qui augmente significativement la sensibilite de cette sonde aux proprietes du gaz electronique. Cependant, des difficultes techniques importantes, liees a la nature intrinseque de ce materiau, doivent etre surmontees pour proceder a des mesures suivant differentes polarisations. La presente etude a profondement modifie notre comprehension de ce systeme. En effet, ces mesures ont permis de constater que le kappa-ET2Cu[N(CN)2]Br est un compose qui est situe en bordure de la zone de coexistence entre la supraconductivite et le magnetisme, ce qui constitue un resultat totalement inattendu. De plus, la

    8. Radiobiological researches on Dianthus caryophyllus L. carnation chimeras; Recherches radiobiologiques sur des chimeres d'oeillet Dianthus caryophyllus L.

      Energy Technology Data Exchange (ETDEWEB)

      Pereau-Leroy, Pierre

      1975-04-12

      This research thesis reports a radiobiological study of Dianthus periclinal chimeras performed by submitting plants and plant cuttings at different physiological stages to cobalt-60 gamma irradiation under different dose conditions and rates. The effects of these treatments are studied while growing the so-processed plants and by microscopic examination of sections of irradiated meristems [French] Une etude radiobiologique de chimeres periclinales d'oeillet est effectuee en soumettant au rayonnement gamma du cobalt 60, sous differentes conditions de doses et debits de dose, des plantes entieres et des boutures a des stades physiologiques differents. Les effets des traitements sont observes au cours de la culture des plantes traitees et par l'examen microscopique de coupes des meristemes irradies. La destruction de cellules meristematiques, dans des proportions variables avec les modalites d'irradiation, provoque des modifications de structure des chimeres dont les plus frequentes sont la formation de tiges genetiquement homogenes a partir des differents genotypes existants dans la plante irradiee. Le traitement aux radiations ionisantes constitue donc une methode pratique de detection des chimeres periclinales qui, a l'image de ce qui se passe pour l'oeillet, sont tres repandues chez les plantes cultivees a propagation vegetative. Mais, comme il existe generalement plus de deux ensembles cellulaires meristematiques independants, cette methode ne permet pas, a elle seule, de definir la repartition des differents genotypes dans ces ensembles; elle doit alors etre completee par des etudes genetiques ou des marquages cellulaires tels que des mutations chlorophylliennes ou de genomes. Ainsi la structure de deux varietes d'oeillet a fleurs oranges, qui produisent, apres irradiation, des fleurs rouges et des fleurs jaunes, a ete determinee grace a l'obtention, par traitement a la colchicine, de cytochimeres 4 - 2 - 2 et 2 - 4 - 4. Les tiges a fleurs jaunes, produites par

    9. Estructuras sintácticas de la oración en el piapoco

      Directory of Open Access Journals (Sweden)

      1994-01-01

      Full Text Available STRUCTURES SYNTAXIQUES DE L’ÉNONCÉ EN PIAPOCO. En langue piapoco, l’énoncé déclaratif a deux schémas fondamentaux désignés respectivement comme “unitaire” et “duel”. Le schéma unitaire se produit lorsque le noyau prédicatif se manifeste de manière compacte en un seul terme selon le degré de définition des actants le schéma duel lorsqu’il se manifeste par deux termes obligatoires et dépendants l’un de l’autre. Sous le schéma unitaire nous trouvons des énoncés actifs et statifs. Les statifs sont formés par des constructions prédicatives dont la base peut être un nom, un adjectif, un pronominal ou une marque casuelle (ce dernier cas est particulièrement intéressant le Piapoco, à la différence de beaucoup de langues peut effectivement utiliser certaines marques casuelles et certains morphèmes grammaticaux comme centres de prédicats. Les énoncés actifs se divisent quant à eux en monovalents et bivalents. Dans les premiers nous trouvons des noyaux formés par des verbes intransitifs dans les seconds, nous trouvons des noyaux formés par des verbes transitifs ou statifs (dans le sens où il n’y a pas d’action d’une entité sur une autre. Dans ces énoncés actifs nous trouvons aussi des noyaux formés par des marques casuelles. Les énoncés descriptifs suivent le schéma duel. Le prédicat -- qui s’oppose toujours alors à un sujet -- peut être conformé par un nom, un adjectif, un verbe. Dans ce dernier cas, on peut avoir une thématisation d’agent ou une thématisation de patient. En piapoco la oración declarativa tiene dos esquemas fundamentales denominados 'unitario” y “dual”: unitario cuando el núcleo predicativo se manifiesta en forma compacta bajo un solo término dependiendo del grado de definición de los actantes y dual cuando se manifiesta bajo dos términos obligatorios y dependientes el uno del otro. En el unitario encontramos oraciones activas y estativas. Las estativas están conformadas

    10. ÉTUDE DE CAS — Chine : Lier agriculteurs et chercheurs en Chine ...

      International Development Research Centre (IDRC) Digital Library (Canada)

      5 janv. 2011 ... L'élément clé : le renforcement des systèmes locaux d'amélioration des semences. Trop souvent, les agriculteurs et les chercheurs travaillent dans des mondes différents. Les chercheurs produisent des variétés hybrides exotiques en laboratoire qui ne réussissent que parce qu'elles vivent dans des ...

    11. L’hybridation interspécifique chez les champignons phytopathogènes à l’origine de nouvelles maladies

      OpenAIRE

      Frey, Pascal

      2009-01-01

      Mécanisme évolutif bien connu chez les plantes, l’hybridation interspécifique a été relativement peu étudiée dans certains groupes taxonomiques, comme les champignons. Chez les champignons phytopathogènes, l’hybridation entre une espèce indigène et une espèce exotique peut pourtant conduire à l’émergence de nouvelles maladies des plantes.

    12. Analyse écophysiologique et modélisation de l’interaction génotype x environnement x itinéraire technique chez le cotonnier (Gossypium hirsutum L.) au Cameroun pour la conception d'idéotypes

      OpenAIRE

      Loison , Romain

      2015-01-01

      Cotton lint is the first natural fiber used in the world. Cotton provides income to more than 10 million persons in West and Central Africa. In Cameroon, it is produced under rainfed conditions and water shortage is the major abiotic factor limiting yield and lint quality. In this context, a breeding program was initiated in 1950 by IRCT (Institut de Recherches du Coton et des Textiles Exotiques) to increase lint yield, fiber quality and disease resistance. After 60 years, this program has re...

    13. Sonoluminescence et fusion nucléaire

      NARCIS (Netherlands)

      Hilgenfeldt, Sascha; Lohse, Detlef

      2002-01-01

      Curiosité de laboratoire, la sonoluminescence, production de lumière dans une bulle de gaz comprimée par des ultrasons, a suscité depuis une douzaine d'années les théories les plus exotiques. Des expériences très précises et la conjugaison de connaissances provenant de différents domaines de la

    14. Cross-Sections for Low-Energy Neutron-Induced Fission; Sections Efficaces de Fission pour des Neutrons de Faible Energie; 0421 0415 0427 0415 041d 0418 042f 0414 0415 041b 0415 041d 0418 042f , 0412 042b 0417 0412 0410 041d 041d 041e 0413 041e 041d 0415 0419 0422 0420 041e 041d 0410 041c 0418 041d 0418 0417 K 041e 0419 042d 041d 0415 0420 0413 0418 0418 ; Secciones Eficaces en la Fision Inducida por Neutrones de Baja Energia

      Energy Technology Data Exchange (ETDEWEB)

      Rae, E. R. [Atomic Energy Research Establishment, Harwell, Didcot, Berks. (United Kingdom)

      1965-07-15

      The cross-sections of the heavy nuclei for neutron-induced fission are of fundamental importance to the technology of nuclear energy production. The manner in which these cross-sections vary with the neutron energy and with the mass and charge of the target nuclei also provides much information on the structure of heavy nuclei. In the case of a thermally fissile target nucleus, as the neutron energy is increased from thermal the cross-section first exhibits an inverse velocity dependence, followed by a region in which sharp resonance peaks appear, and finally a continuum region where the cross-section exhibits relatively smooth steps and breaks. All these phenomena can be explained in principle, but certain features of the data have proved very difficult to explain quantitatively. Recent cross-section measurements, stimulated by the needs of reactor technology, have concentrated on improving the energy resolution and accuracy of the data on fuel materials, and this has led to a more detailed study of the resonance region, which is of considerable interest for reactor Doppler effect calculations. More accurate measurements at rather higher energies have established the existence of appreciable fission cross-sections below the so-called fission threshold in certain cases. Careful measurements of this nature have in turn stimulated interest in the interpretation of the cross-sections in terms of nuclear models on a firm quantitative basis. This paper outlines the main features of neutron-induced-fission cross-sections and their interpretation. Some emphasis is placed on recent improvements in the quality of the measurements and in attempts at quantitative interpretation of certain aspects of the data. (author) [French] Les sections efficaces de fission des noyaux lourds ont une importance essentielle pour la technologie de la production d'energie d'origine nucleaire. La maniere dont ces sections efficaces varient Selon l'energie des neutrons et Selon la masse et la

    15. A new detector for the measurement of neutron flux in nuclear reactors; Nouvelle methode de mesure des flux de neutrons dans les reacteurs atomiques

      Energy Technology Data Exchange (ETDEWEB)

      Koch, L; Labeyrie, J; Tarassenko, S [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

      1958-07-01

      The detector described is designed for the instantaneous measurement of thermal neutron fluxes, in the presence of high {gamma} ray activity; this detector can withstand temperatures as high as 500 deg. C. It is based on the following principle: radioactive atoms resulting from heavy-nucleus fission are carried by a gas flow to a detector recording their {beta} and {gamma} disintegration. Thermal neutron fluxes as low as few neutrons per cm{sup 2} per second can be measured. This detector may be used to control a nuclear reactor, to plot the thermal flux distribution with an excellent definition (1 mm{sup 2}) for fluxes higher than 10{sup 8} n/cm{sup 2}/s. The time response of the system to a sharp variation of flux is limited, in case of large fluxes, to the transit time of the gas flow between the fission product emitter and the detector; of the order of one tenth of a sec per meter of piping. The detector may also be applied for spectroscopy of fission products eider than 0,1 s. (author)Fren. [French] On decrit un appareil permettant la mesure instantanee des flux de neutrons thermiques accompagnes de flux intenses de rayons {gamma} et situes dans des enceintes pouvant etre portees a des temperatures superieures a 500 deg. C. On utilise la radioactivite des atomes resultant de la fission des noyaux lourds; ces atomes sont entraines par un courant gazeux vers un detecteur de radioactivite qui enregistre leurs desintegrations {beta} et {gamma}. On peut mesurer des flux partir de quelques neutrons thermiques par cm{sup 2} et par seconde. L'appareil permet de suivre la puissance d'un reacteur atomique, de tracer des cartes de densite de neutrons avec une tres bonne definition (1 mm{sup 2}) dans le cas de flux superieurs a 10{sup 8} cm{sup 2}/s. Le temps de reponse du systeme a une variation du flux de neutrons est limite, poes flux importants, par le temps de transit du gaz entre l'emetteur de produits de fission et le detecteur: soit quelques dizaines de

    16. Coherent pion production in the {sup 12}C and {sup 40}Ca by the (3 He,t{pi}{sup +}) charge exchange reaction at 2 GeV; Production coherente de pions dans les noyaux {sup 12}C, {sup 40}Ca, par reaction d`echange de charge ({sup 3}He, t{pi}{sup +}) a 2 GeV

      Energy Technology Data Exchange (ETDEWEB)

      Farhi, Laurent [Inst. de Physique Nucleaire, Paris-11 Univ., 91 - Orsay (France)

      1997-10-13

      The coherent pion production process on nuclei is defined as the excitation of the first excited state of the nucleon, the delta(1232) resonance, creating a delta-hole state. This state propagates through the nuclear medium and then decays in a single pion, living the target nuclei in its ground state. In the nuclei, the attractive interaction between delta-hole states in the spin-longitudinal channel shifts down the effective mass of the delta and induces a collective state of excitation. The nuclear response in the longitudinal channel of interaction can be studied experimentally through the resonance decay coherent process triggered by a probe coupling longitudinally with the delta and selected by the target form factor. The ({sup 3}He, t) probe at 2 GeV on nuclei and the experimental set-up SPES IV-Pi have been used to study this decay process. A simulation program using GEANT and including theoretical consideration, knowledge of previous experimental results and the experimental properties of the set-up, have demonstrated the capability of the experiment for this study. The setting of the PCOS-IV acquisition system of multiwire proportional chambers and of the development and use of programs for treatment and analysis of experimental data have been necessary steps to make the experiment at Laboratoire National SATURNE as well as to obtain physical parameters in order to exhibit the coherent process. Nevertheless, the angular distribution of coherent pions differ from the theoretical predictions. Several hypotheses involving the experimental set-up and physical processes have been investigated in order to account for such distributions. (author) 44 refs., 68 figs., 7 tabs.

    17. Properties and decay modes of hot nuclei produced in the reaction: {sup 36}Ar on {sup 58}Ni and detected with INDRA device; Proprietes et modes de desexcitation des noyaux chauds observes dans la reaction {sup 36}Ar sur {sup 58}Ni avec le detecteur INDRA

      Energy Technology Data Exchange (ETDEWEB)

      Nalpas, L [CEA Centre d` Etudes de Saclay, 91 - Gif-sur-Yvette (France). Dept. d` Astrophysique, de la Physique des Particules, de la Physique Nucleaire et de l` Instrumentation Associee; [Paris-11 Univ., 91 - Orsay (France)

      1997-01-01

      Hot nuclei are formed in heavy ion collisions covering the Fermi energy domain. According to the excitation energy deposited into these nuclei, several de-excitation processes can be observed, in particular the emission of complex fragments (Z {>=} 3) which remains poorly understood. The GANIL facility offers the possibility to cover the excitation function for the Ar on Ni reaction over a broad energy range from 32 to 95 MeV/u where the hot nuclei evolve from classical `evaporation` to complete `vaporization` into light particles (neutrons, isotopes of H, He). The study of reaction mechanisms shows that from peripheral to central collisions the total cross section is dominated by binary dissipative collisions. Both partners coming from well-characterized events with the INDRA detector are reconstructed using the `Minimum Spanning Tree` method. Thus excitation energy up to 20 MeV/A are reached in the most violent collisions at the highest bombarding energy. The deposited energy is not shared in the mass ratio between the quasi-projectile and the quasi-target, the quasi-projectile being hotter. For total excitation energies ranging roughly from 2 to 8 MeV/A, the proportion of `multifragmentation` events increases to reach a plateau at about 10 MeV/A due to the rising probability to have complete `vaporization` of the system above 8 MeV/A. The steady increase of the temperature extracted from the double isotopic He-Li ratios with excitation energy for the quasi-projectile suggests a progressive evolution of the de-excitation processes as predicted by statistical models. No signal of first order liquid-gas phase transition is seen in our data. (author) 124 refs.

    18. Contribution to the study of the {alpha} spectrometry by the impulse ionization chamber. Application to the study of the beam fine structure of some heavy nuclei; Contribution a l'etude de la spectrometrie {alpha} par la chambre d'ionisation a impulsion. Application a l'etude de la structure fine du rayonnement de quelques noyaux lourds

      Energy Technology Data Exchange (ETDEWEB)

      Valladas, G [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

      1954-05-15

      In the first part, it studies an impulse spectrometer of which the resolution and stability have been pushed to their maximum possibilities. It uses an ionization chamber because of its simple and steady functioning. The general characteristics and building of the ionization chamber are described. The electronic devices are described as well as the recording system. The theoretical study of the amplifier has allowed to reduce the amplitude dispersion from electronic devices as background noise. The resolution in energy of an {alpha} spectrometer using an impulse ionization chamber is studied and results are discussed. The spectral lines display of the fine structure under the effect of conversion electrons emitted by coincidence in the ionization chamber is studied. Finally, the detection possibilities of very low intensity spectral lines of fine structure of detection are considered. In the second part, the {alpha} emission of fine structure of {sup 230}Th, {sup 234}U and {sup 238}U nuclei is studied. (M.P.)

    19. First observation of the nuclei {sup 45}Fe and {sup 49}Ni (T{sub Z} = - 7/2) and {sup 42}Cr (T{sub Z} = - 3); Premiere observation des noyaux {sup 45}Fe et {sup 49}Ni (T{sub Z} = - 7/2) et {sup 42}Cr (T{sub Z} = - 3)

      Energy Technology Data Exchange (ETDEWEB)

      Blank, B.; Czajkowski, S.; Davi, F.; Del Moral, R.; Fleury, A.; Marchand, C.; Pravikoff, M.S. [Centre d`Etudes Nucleaires, Bordeaux-1 Univ., 33 Gradignan (France); Dufour, J.P. [URA 451, Gradignan (France); Benlliure, J.; Boue, F.; Collatz, R.; Heinz, A.; Hellstroem, M.; Hu, Z.; Roeckl, E.; Shibata, M.; Suemmerer, K. [Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany); Janas, Z.; Karny, M.; Pfuetzner, M. [Institute of Experimental Physics, University of Warsaw, PL-00 681 Warszawa (Poland); Lewitowicz, M. [Grand Accelerateur National d`Ions Lourds (GANIL), 14 - Caen (France)

      1997-06-01

      The two-proton radioactivity from the ground states was predicted by V.I. Goldanskii; it can take place either by {sup 2}He emission or by the simultaneous emission of two spatially non-correlated protons. For the nuclei liable to this type of radioactivity the single proton emission is energetically forbidden. The two-proton decay was observed for {sup 6}Be{sup 2} and {sup 12}O{sup 3} but the Q-value of the reaction is high above the Coulomb barrier and as such does not permit a decay process of a sufficient long lifetime. Theoretical calculations by B.A. Brawn predict {sup 39}Ti, {sup 45}Fe and {sup 48}Ni as the best candidates with the 2p emission lifetime within 1{mu}s to 150 ms. Only {sup 39}Ti decay has been observed so far. As candidate for 2p radioactivity nuclei we studied {sup 38}Ti, {sup 42}Cr, {sup 45}Fe and {sup 48`49}Ni. A primary beam of {sup 58}Ni at 600 MeV/nucleon from the SIS synchrotron at GSI was used to produce proton-rich isotopes in the titanium-to-nickel region by projectile fragmentation on a beryllium target. The fragment were separated by the projectile-fragment separator FRS and unambiguously identified by means of its standard detection set-up using a ToF-{Delta}E-B{rho} analysis. We report here the first observation of the T{sub Z} = - 7/2 nuclei {sup 45}Fe and {sup 49}Ni, the most proton-rich nuclei ever synthesized with an excess and seven protons. In addition, the new isotope {sup 42}Cr (T{sub Z} -3) was also identified. These isotopes are, according to commonly used mass predictions, all unbound with respect to two-proton emission from their ground states. However, we did not observe any count corresponding to {sup 38}Ti (T{sub Z} -3) although we expected about 5 counts in a setting optimized for this isotope 6 refs.

    20. Nuclear fragmentation for Xe+Au and Xe+Ag systems at an energy of 44 A.MeV, formation and decay of hot nuclei; Etude de la fragmentation nucleaire pour les systemes XE+AU et XE+AG a 44 A.MeV, production et decroissance de noyaux chauds

      Energy Technology Data Exchange (ETDEWEB)

      Meslin, C.

      1995-01-01

      A study of the formation and the decay of hot nuclear fragments produced in the reactions Xe+Au and Xe+Ag at an energy of 44 A.MeV is presented in this thesis. The 4{pi} experimental setup consisted of four multidetectors -two for the detection of the fragments (Z>7; DELF and XYZT) and two for the detection of the charged particles (Z<6; MUR and TONNEAU) and allowed an analysis using ``complete events`` (80 % of the total charge and the total parallel linear momentum of the entrance channel) to be carried out. The reaction mechanism is binary with as observed at low energy an almost complete relaxation of the incident energy. The collision results in two hot fragments at the beginning of the exit channel which decay by evaporation and/or fragmentation. In addition of these two body events, we have identified a new dynamic mechanism where we detect a small fragment, called the neck, coming form the overlap of the nuclei during the interaction, in coincidence with a projectile-like fragment and a target-like fragment. For the most dissipative collisions, the deep inelastic collision have allowed an estimation of the lifetime of the hot nuclear fragments to be made. This is possible using proximity effects and fragment-fragment space-time correlations of the decay of one or two primary partners from the deep inelastic collisions. This method is seen to reach its limits in the case of the reactions studied here. (authors). 61 refs.

    1. Study of the production of residual evaporation nuclei issued from the spallation reaction of uranium-238 by 1 GeV protons; Etude de la production de noyaux residuels d'evaporation issus de la reaction de spallation de l'uranium-238 par des protons a 1 GeV

      Energy Technology Data Exchange (ETDEWEB)

      Taieb, J

      2000-10-01

      The spallation reaction by high energy protons is one of the envisaged nuclear reactions for production of exotic nuclei. We have measured the production of more than 300 different evaporation residues issued by the spallation reaction of Uranium-238 by 1 GeV protons. We used the reverse kinematics technique in order to produce the relativistic nuclei and therefore to be able to detect those nuclides within a very short time, shorter in most cases than the radioactive disintegration period. The achieved nuclear charge and mass resolution are excellent. They allow a good accuracy on the values of the measured cross-sections (10 to 15%). We have observed for the first time the nuclide Actinium-235 obtained consequently to the loss of 3 protons by the projectile. The measured isotopic distribution are strongly influenced by the mechanism of fission which leads to a strong reduction of the production of the heavy neutron deficient isotopes. We have compared our results to some other measurements achieved with radio-chemical methods at a similar energy. We observed a systematic disagreement of about 40%. Some comparison with the available systematics show that those are presently not able to reproduce the data with a reasonable precision. We could also measure the recoil momentum distribution for each studied isotopes. We show that Goldhaber's model agrees very well with the experiment in case. of 'cold' channels where the evaporation of particles never occurs. On the other hand, when the produced pre-fragment is excited the data show that Goldhaber's model does not reproduce.the data showing the limitation of such an approach. We finally tried to reproduce the measurement of evaporation residue cross-section thanks to the coupling of intra-nuclear cascade and statistical evaporation codes. The influence of the fission process is rather important is the system p+U; we therefore had to account for the dynamical aspect of the fission. We also showed the determinant role of the 126 neutron shell closure. (author)

    2. Collective excitations at low energy: microscopic study of rotation, vibration and their coupling in even-even nuclei; Excitations collectives a basse energie: Etude microscopique de la rotation, de la vibration et de leur couplage dans les noyaux pair-pairs

      Energy Technology Data Exchange (ETDEWEB)

      Deloncle, I.

      1989-10-23

      In this study we have built the quadrupolar collective Bohr Hamiltonian in a purely microscopic way by using an approximation of the time-dependant Hartree-Fock adiabatic approach. The purpose of this work was to obtain a quantitative description of the collective properties in the low energy range of intermediate and heavy nuclei by using a 2-body effective interaction of Skyrme-type. We consider low energy processes as dynamic regimes in which the collective movement is adiabatic when compared with modes associated to individual freedom. In the N-body solution we propose, we have assumed that: -) a mean field exists at any moment, -) some collective variables exist whose temporal variations include all the dynamics, and -) the collective movement is adiabatic. This work is a microscopic formulation and an efficient approach to resolve the Bohr and Mottelson unified model. Low energy spectra have been computed for 4 nuclei: Ge{sup 74}, Se{sup 76}, Cd{sup 110} and Pt{sup 186} and they agree well with experimental data.

    3. Proton scattering on unstable nuclei: study of {sup 40}S(p,p`) and {sup 43}Ar(p,p`) reactions, development of detection system MUST; Diffusion de protons par des noyaux instables: Etudes des reactions {sup 40}S(p,p`) et {sup 43}Ar(p,p`), developpement du systeme de detection MUST

      Energy Technology Data Exchange (ETDEWEB)

      Marechal, F

      1998-02-06

      We measured for the first time the elastic and inelastic proton scattering on the {sup 40}S unstable nucleus. The experiment was performed in inverse kinematics at the NSCL AT Michigan State University with a {sup 40}S secondary beam bombarding a CH{sub 2} target at 30 MeV/A. We obtained the elastic scattering angular distribution and two points of the inelastic distribution to the first 2{sup +} excited state found to be located at 860{+-}90 KeV. With a coupled channel analysis, the {beta}{sub 2} quadrupolar deformation parameter is found to be equal to 0.35{+-}0.05. This value can be compared to 0.28{+-}0.02 obtained by coulomb excitation. A macroscopic analysis allowed us to extract the neutron and proton transition matrix element ratio M{sub n}/M{sub p} which is equal to 1.88{+-}0.38. This value, greater than N/Z, could indicate an isovector effect in the first 2{sup +} state excitation which could be due to a difference between the neutron and proton vibrations. The microscopic analysis gives the possibility to test the densities and the transition densities to the first 2{sup +} state. The calculated densities for the {sup 40}S nucleus show a neutron skin. However the microscopic analysis yields a M{sub n}/M{sub p} ratio of 1.40{+-}0.20. A similar elastic and inelastic proton scattering experiment allowed us to get a deformation parameter of 0.25{+-}0.03 for the {sup 43}Ar nucleus. To develop the study of direct reactions induced by radioactive beams at GANIL, we have developed and built, in collaboration with the CEA-Saclay and the CEA-Bruyeres, the new detector MUST.It is based on the silicon strip technology, and is dedicated to the measurement of recoiling light particles emitted in these reactions. The results obtained with a {sup 40}Ar beam at 77 Me V/A, have shown the good performances of the detector for the particle identification as well as for the resolutions, and allow us to consider now a large experimental programme concerning these direct reactions induced by radioactive beams. These tests allowed us to establish a reference procedure to calibrate the detector and to analyse the data. We have also developed a simulation code in order to determine the best use conditions of MUST in the future experiments. (author) 103 refs.

    4. Contribution to the experimental study of excited levels of some light nuclei by using the method of angular correlation of internal conversion pairs and monopolar pairs; Contribution a l'etude experimentale de niveaux excites de quelques noyaux legers par la methode des Correlations angulaires des paires de conversion interne Et des paires monopolaires

      Energy Technology Data Exchange (ETDEWEB)

      Armbruster, Raymond

      1950-07-01

      In a first part, the author presents a brief theory of angular correlations of internal conversion pairs and monopolar pairs, and indicates the complete formulations which are used to compute all the angular correlations corresponding to the performed experiments. In a second part, he describes a beta spectrometer, outlines factors which govern the energy resolving power, and the peculiarity of summation of two pulses proportional to the energy of the electron and positron which build up an internal pair. In a third part, the author reports experiments of angular correlations, indicates the shapes of monopolar spectra for different angles between electron and positron emission directions, determines the multipolarity of gamma radiations from the first excited levels of {sup 13}C and {sup 12}C, and gives the angular moments, parity and isobaric spin of two excited levels of the {sup 12}C [French] Dans la premiere partie de notre travail, nous exposons une theorie sommaire des correlations angulaires des paires de conversion interne et des paires monopolaires. A la fin de cette premiere partie sont indiquees les formules completes, qui nous ont servi a calculer pratiquement toutes les correlations angulaires correspondant a nos experiences. Dans la deuxieme partie, nous decrivons un spectrometre beta a scintillation. Nous insistons surtout sur les elements qui determinent le pouvoir de resolution en energie et sur la particularite de sommation de deux impulsions proportionnelles a l'energie de l'electron et du positron formant une paire interne. Dans la troisieme partie, nous exposons nos experiences de correlations angulaires. Nous avons repris une mesure precise de la correlation angulaire des paires monopolaires provenant du niveau 6,05 Mev de l'Oxygene 16. Il nous a ete egalement possible de donner l'allure des spectres monopolaires pour differents angles formes par les directions d'emission de l'electron et du positron. Nous avons determine par la methode des correlations angulaires des paires de conversion interne, la multipolarite des rayonnements gamma de 3,09 Mev (E1) et de 4,43 Mev (E2) provenant respectivement des premiers niveaux excites du {sup 13}C et du {sup 12}C. Enfin, nous donnons les moments angulaires, la parite et le spin isobarique de deux niveaux excites du {sup 12}C: 2{sup -}, T = 1 pour le niveau 16,57 Mev et 1{sup -}, T = 1 pour le niveau 17,22 Mev. (auteur)

    5. Influence of i{sub 13/2} proton and j{sub 15/2} neutron intruding orbitals on the behaviour of 190 mass region superdeformed nuclei; Influence des orbitales intruses proton i{sub 13/2} et neutron j{sub 15/2} sur le comportement des noyaux superdeformes de la region de masse 190

      Energy Technology Data Exchange (ETDEWEB)

      Duprat, J

      1995-01-01

      This work concerns the study of the nuclear superdeformation phenomenon in the A = 190 mass region. The superdeformed (SD) states in {sup 193}Tl, {sup 194}Tl {sup 195}Tl were produced via heavy-ion induced reactions and studied with the EUROGAM gamma multidetector array. The analysis of high-multiplicity events allowed the study of the magnetic properties of the SD states in these nuclei. For the first time, the g-factor of a proton orbital in a SD nucleus in the A = 190 mass region has been extracted. This measurement indicates that the two known bands in {sup 195}Tl-SD are built on the i{sub 13/2} proton intruder orbital. A new SD band has been found in this isotope: it is the first SD band built on an excited proton state found in the A = 190 region. Finally an interaction between two pairs of bands has been established in {sup 194}Tl; this interaction indicate the crossing of two neutron orbitals above the N = 112 gap. The magnetic properties of the states of the SD bands in {sup 194}Tl reveals that these bands are built on configurations in which the single proton and neutron intrinsic spins are aligned. Comparison between different SD bands in the Thallium isotopes shows the prominent role of the i{sub 13/2} proton and the j{sub 15/2} neutron intruder orbitals in the smooth increase of the dynamical moment of inertia as a function of the rotational frequency. In addition, this work reports on the first observation of a SD rotational band produced in a (HI, {alpha}xn) reaction channel. The study of the maximum spin reached by the SD bands indicates both a competition between alpha emission and fission of the compound nucleus, and the limitation due to the fission process in the population of the SD nuclei in the A = 190 region. (author). 120 refs., 112 figs., 22 tabs., 2 ann.

    6. Beta decay and magnetic moments as tools to probe nuclear structure. Study of neutron-rich nuclei around N=40; Decroissance beta et moments magnetiques comme outils pour sonder la structure nucleaire. Etude des noyaux riches en neutrons autour de N=40

      Energy Technology Data Exchange (ETDEWEB)

      Matea, I

      2003-12-01

      The evolution of nuclear structure in nuclei far from the {beta} stability line is one of the 'hot topics' in modern experimental and theoretical nuclear physics. The present thesis is devoted to the study of structure of neutron-rich nuclei around N=40. The evolution of the neutron g9/2 orbital with increasing number of neutrons is one of the key points defining the structure of these nuclei at low excitation energy. We used for this investigation as experimental tools the magnetic dipole moments measurements and the {beta} decay spectroscopy. For the measurement of the gyromagnetic factor of the 9/2{sup +} isomeric state in Fe{sup 61} we have applied the TDPAD method. This method (like most of measurements of nuclear moments) requires an oriented ensemble of nuclei. The orientation of Fe{sup 61m} was achieved via the fragmentation of Ni{sup 64} at 55 MeV/u and the selection of the fragment momentum with the LISE spectrometer at GANIL. The experimental device was specially conceived to preserve the alignment up to the implantation point. The measured value of the g factor was compared with large-scale shell model and Hartree-Fock-Bogoliubov model predictions. The nuclei studied via {beta} decay were produced by the fragmentation of Kr{sup 86} at 58 MeV/u. For the selection of reaction products we used for the first time the LISE2000 spectrometer and for the detection of {gamma} rays four EXOGAM clover detectors. We measured 5 new lifetimes and 4 lifetimes with a higher precision. From the prompt {beta}{gamma} coincidences we identified new states in the daughter nuclei, as it is the case of the first 2{sup +} excited states in Fe{sup 68} and Ni{sup 72}. The results were compared with the predictions of the large-scale shell model. Other transitions were observed for the first time in {beta}{gamma} decay of Ti{sup 60}, Fe{sup 70} and Co{sup 71,73}. (author)

    7. Study of neutron-rich nuclei structure around the N=28 shell closure using the in-beam gamma spectroscopy technique; Etude de la structure des noyaux riches en neutrons autour de la fermeture de couches N=28 par spectroscopie gamma en ligne

      Energy Technology Data Exchange (ETDEWEB)

      Bastin, B

      2007-10-15

      For a few years now, a loss of magicity in neutron-rich nuclei near the neutron drip-line at N=28 has been suggested and observed. Deformation in these nuclei has been observed. The deformation was explained in S isotopes as being due to a moderate reduction of the N=28 shell closure together with a proton induced collectivity originating from the near degeneracy of the proton d3/2 and s1/2 orbitals. As a consequence, the observed deformation seems to result from a subtle interplay between neutron and proton excitations. Since the proton configuration in the Si isotopes is expected to be more stable due to the Z=14 sub-shell gap, {sup 42}Si was considered as a key nucleus in order to distinguish the different effects responsible for the structural changes observed at N=28. Even if it is at the limits of our technical possibilities, an in-beam gamma-spectroscopy experiment using two-step fragmentation and one or several nucleons knockout reaction mechanisms was performed at GANIL. The measurement of the energy of the first excited state in {sup 42}Si, combined with the observation of {sup 38,40}Si and the spectroscopy of {sup 41,43}P, has given evidence for the loss of magicity at N=28 far from stability. Modifications of the effective interaction used in modern shell model calculations have been completed following this investigation, increasing its predictive character. This study confirms the role of the tensor force and the density dependence of the spin-orbit interaction in the collapse of the N=28 shell closure. (author)

    8. Study of neutrons resonances as a function of spin for the nuclei I = 1/2 (silver, thulium, platinum) between 1 and 800 eV; Etude des resonnances de neutrons en foncton de leur spin pour les noyaux I = 1/2 (argent, thulium et platine) entre 1 et 800 eV

      Energy Technology Data Exchange (ETDEWEB)

      De Barros, S M [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

      1966-04-01

      The assignment of spins has been made for 120 levels of 239 detected. From these data we have deduced that: - The ratio of average spacing of each state of spin obeys the law of 2 J + 1. - The values of the strength function of {sup 195}Pt and {sup 169}Tm are in agreement with the model of Chase et Al and has the same values for the two states of spin. - The fluctuations of total radiation widths of resonances are observed in the case of {sup 195}Pt for the two spin-states. - The neutron widths are governed by the distributions of Porter and Thomas with one degree of freedom; the observed spacings are consistent with the Wigner distribution for two populations. (author) [French] L'attribution de spin a ete faite pour 120 niveaux sur 239 detectes. On en deduit: - Le rapport des espacements moyens pour chaque etat de spin qui obeit a la loi en (2j + 1). - Les valeurs des fonctions densites de {sup 195}Pt et {sup 169}Tm sont en accord avec le modele du noyau deforme de Chase et al. et ont la meme valeur pour les deux etats de spin. - Des fluctuations, dans les largeurs radiatives totales des resonances sont observees dans le cas de {sup 195}Pt pour les deux etats de spin. - Les largeurs de diffusion suivent les distributions de Porter et Thomas a un degre de liberte; les espacements celles de Wigner a deux populations. (auteur)

    9. Study of the break reaction of Be{sup 11} on Ti{sup 48} target; the towing mode: a spectroscopic tool for the study of nuclei; Etude de la reaction de cassure du {sup 11}Be sur cible de {sup 48}Ti; le towing mode, un outil spectroscopique pour l'etude des noyaux

      Energy Technology Data Exchange (ETDEWEB)

      Lima, V

      2004-10-01

      In a towing mode reaction the projectile picks up a nucleon from the target and then breaks up by emitting one nucleon. The velocity of the emitted nucleon is boosted by the projectile velocity, leading to the emission of the nucleon in a narrow cone around the direction of the scattered projectile. This work is dedicated to the towing mode in halo nuclei such as Be{sup 11}. The experiment was performed at Ganil facility by bombarding a Ti{sup 48} target with a 41 MeV per nucleon Be{sup 11} beam, the reaction studied is: Ti{sup 48}(Be{sup 11}, Be{sup 10} + n + {gamma}). The first chapter reviews the various nuclear processes that take place when 2 nuclei collide with a particular attention for the towing mode. The second chapter is dedicated to solving the time dependant Schroedinger equation (TDSE) in order to assess the impact of various parameters such as incident energy, target charge or the linking energy of the nucleon, on the towing mode reaction. The third chapter deals with the experimental equipment and set-up including detectors and the data acquisition system. Computerized simulations have been performed in order to assess the efficiency of the detecting system, they are presented in the fourth chapter. A comparison between experimental data and the results from TDSE solving, concerning the energy spectra of the emitted particles, has enabled the author to deduce the spectroscopic factors for the different contributions of the fundamental state of Be{sup 11}, they are presented in the last chapter. The cross-sections of the towing mode are of the magnitude of several tens of milli-barns in the case of weakly bound nuclei like Be{sup 11} which make it an efficient tool to study intern structure of nuclei. (A.C.)

    10. Quantum algebra U{sub qp}(u{sub 2}) and application to the rotational collective dynamics of the nuclei; Algebre quantique U{sub qp}(u{sub 2}) et application a la dynamique collective de rotation dans les noyaux

      Energy Technology Data Exchange (ETDEWEB)

      Barbier, R

      1995-09-22

      This thesis concerns some aspects of new symmetries in Nuclear Physics. It comprises three parts. The first one is devoted to the study of the quantum algebra U{sub qp}(u{sub 2}). More precisely, we develop its Hopf algebraic structure and we study its co-product structure. The bases of the representation theory of U{sub qp}(u{sub 2}) are introduced. On one hand, we construct the finite-dimensional irreducible representations of U{sub qp}(u{sub 2}). On the other hand, we calculate the Clebsch-Gordan coefficients with the projection operator method. To complete our study, we construct some deformed boson mappings of the quantum algebras U{sub qp}(u{sub 2}), U{sub q{sup 2}}(su{sub 2}) and U{sub qp}(u{sub 1,1}). The second part deals with the construction of a new phenomenological model of the non rigid rotator. This model is based on the quantum algebra U{sub qp}(u{sub 2}). The rotational energy and the E2 reduced transition probabilities are obtained. They depend on the two deformation parameters q and p of the quantum algebra. We show how the use of the two-parameter deformation of the algebra U{sub qp}(u{sub 2}) leads to a generalization of the U{sub q}(su{sub 2})-rotator model. We also introduce a new model of the anharmonic oscillator on the basis of the quantum algebra U{sub qp}(u{sub 2}). We show that the system of the U{sub q}(su{sub 2})-rotator and of the anharmonic oscillator can be coupled with the use of the deformation parameters of U{sub qp}(u{sub 2}). A ro-vibration energy formula and expansion `a la` Dunham are obtained. The aim of the last part is to apply our non rigid rotator model to the rotational collective dynamics of the superdeformed nuclei of the A{approx}130 - 150 and A{approx}190 mass regions and deformed nuclei of the actinide and rare earth series. We adjust the free parameters of our model and compare our results with those from four other models of the non rigid rotator. A comparative analysis is given in terms of transition energies.

    11. Resonant ionization by laser beams: application to ions sources and to study the nuclear structure of radioactive tellurium isotopes; Ionisation resonante par faisceaux laser: application aux sources d'ions et a l'etude de la structure des noyaux radioactifs de tellure

      Energy Technology Data Exchange (ETDEWEB)

      Sifi, R

      2007-07-15

      The radioactive ion beams that are produced through current isotope separators are well separated according to the A mass but not according to the Z parameter. The resonant ionization through laser beams applied to ion sources allows the production of radioactive ion beam in a very selective and efficient way by eliminating the isobaric contamination. The first chapter is dedicated to the resonant ionization by laser beams, we describe the principle, the experimental setting, the lasers used, the ionization schemes and the domain of application. The second chapter deals with the application of resonant ionization to laser ion sources for the production of radioactive ion beams. We present experimental tests performed for getting copper ion beams. Resonant ionization through laser is also used in the spectroscopy experiments performed at the Isolde (isotope separation on-line device) installation in CERN where more than 20 elements are ionized very efficiently. The technique is based on a frequency scanning around the excitation transition of the atoms in order to probe the hyperfine structure. Laser spectroscopy allows the determination of the hyperfine structure as well as the isotopic shift of atoms. In the third chapter the method is applied to the spectroscopy of tellurium atoms. First, we define the 2 parameters on which the extraction is based: charge radius and nuclear moments, then we present several theoretical models that we have used to assess our experimental results. (A.C.)

    12. Study of the influence of the shell correction energy on the nuclear reactions leading to the region of the superheavy nuclei; Etude de l'influence de l'energie de correction de couches sur les reactions nucleaires menant a la region des noyaux superlourds

      Energy Technology Data Exchange (ETDEWEB)

      Marchix, A

      2007-11-15

      The aim of this work is to study the influence of shell correction energy on the deexcitation of superheavy nuclei. For that purpose, a new statistical code, called Kewpie2, which is based on an original algorithm allowing to have access to very weak probabilities, was developed. The results obtained with Kewpie2 have been compared to the experimental data on residue cross sections obtained by cold fusion (Z=108 to Z=113) and by hot fusion (Z=112, Z=114 and Z=116), as well as data on fission times (Z=114, Z=120 and Z=126). Constraints on the microscopic structure of the studied nuclei have been obtained by means of the shell correction energy. By adjusting the intrinsic parameters of the models of fusion in order to reproduce the data on the fusion cross sections, this study shows the necessity of decreasing very strongly the shell correction energy predicted by the calculations of Moller and Nix, during the study of the residues cross sections as well for the nuclei produced by cold fusion as by hot fusion. On the other hand, during the confrontation of the results of Kewpie2 to the data on mean fission times, it is rather advisable to increase it. A shift of the proton shell closure predicted for Z=114 by the calculations of Moller and Nix towards larger Z would allow to explain these opposite conclusions. In this thesis, we also have shown the significant influence of the inclusion of isomeric states on fission times for the superheavy nuclei. (author)

    13. Measurement of the scattering cross-section of non-fissile nuclei by the time-of-flight method. Determination of the spin of some excited States; Mesure de la section efficace de diffusion de noyaux non fissiles par la methode du temps de vol. Determination du spin de quelques etats excites

      Energy Technology Data Exchange (ETDEWEB)

      Trochon, J [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

      1967-07-01

      The Saclay 45 MeV Linear Accelerator is used as a pulsed neutron source to carry out experiments in the resonance energy region. Sometimes, when the right conditions are available, the transmission on measurements can give all the resonance parameters such as E{sub r}, {gamma}{sub n}, 2 g {gamma}{sub n} and J = I {+-} 1/2, when I is the spin of the target nucleus; but usually the complementary data from scattering measurements are required to obtain the value of spin J. This experiment is being run here and we present some data on Rh{sup 103} and Au{sup 197} for energy range between 40 to 700 eV. (author) [French] L'utilisation de l'Accelerateur Lineaire de Saclay de 45 MeV comme source de neutrons pulsee a permis la realisation d'un certain nombre d'experiences dans la region des resonances. Lorsque les conditions sont satisfaisantes, les mesures de transmission peuvent donner tous les parametres des resonances : E{sub r}, {gamma}{sub n}, 2 g {gamma}{sub n} et J = I {+-} 1/2 ou I est le spin du noyau cible; mais souvent les resultats complementaires des mesures de diffusion sont necessaires a l'obtention de la valeur du spin J. Cette experience a ete realisee ici et nous presentons les resultats obtenus sur le {sup 103}Rh et {sup 197}Au dans la gamme d'energie comprise entre 40 et 700 eV. (auteur)

    14. Study of the break reaction of Be{sup 11} on Ti{sup 48} target; the towing mode: a spectroscopic tool for the study of nuclei; Etude de la reaction de cassure du {sup 11}Be sur cible de {sup 48}Ti; le towing mode, un outil spectroscopique pour l'etude des noyaux

      Energy Technology Data Exchange (ETDEWEB)

      Lima, V

      2004-10-01

      In a towing mode reaction the projectile picks up a nucleon from the target and then breaks up by emitting one nucleon. The velocity of the emitted nucleon is boosted by the projectile velocity, leading to the emission of the nucleon in a narrow cone around the direction of the scattered projectile. This work is dedicated to the towing mode in halo nuclei such as Be{sup 11}. The experiment was performed at Ganil facility by bombarding a Ti{sup 48} target with a 41 MeV per nucleon Be{sup 11} beam, the reaction studied is: Ti{sup 48}(Be{sup 11}, Be{sup 10} + n + {gamma}). The first chapter reviews the various nuclear processes that take place when 2 nuclei collide with a particular attention for the towing mode. The second chapter is dedicated to solving the time dependant Schroedinger equation (TDSE) in order to assess the impact of various parameters such as incident energy, target charge or the linking energy of the nucleon, on the towing mode reaction. The third chapter deals with the experimental equipment and set-up including detectors and the data acquisition system. Computerized simulations have been performed in order to assess the efficiency of the detecting system, they are presented in the fourth chapter. A comparison between experimental data and the results from TDSE solving, concerning the energy spectra of the emitted particles, has enabled the author to deduce the spectroscopic factors for the different contributions of the fundamental state of Be{sup 11}, they are presented in the last chapter. The cross-sections of the towing mode are of the magnitude of several tens of milli-barns in the case of weakly bound nuclei like Be{sup 11} which make it an efficient tool to study intern structure of nuclei. (A.C.)

    15. Measurement of the fission cross section induced by fast neutrons of the {sup 232}Th/{sup 233}U nuclei within the innovating fuel cycles framework; Mesure de la section efficace de fission induite par neutrons rapides des noyaux {sup 232}Th/{sup 233}U dans le cadre des cycles de combustible innovants

      Energy Technology Data Exchange (ETDEWEB)

      Grosjean, C

      2005-03-15

      The thorium-U{sup 233} fuel cycle might provided safer and cleaner nuclear energy than the present Uranium/Pu fuelled reactors. Over the last 10 years, a vast campaign of measurements has been initiated to bring the precision of neutron data for the key nuclei (Th{sup 232}, Pa{sup 233} and U{sup 233}) at the level of those for the U-Pu cycle. This is the framework of these measurements, the energy dependent neutron induced fission cross section of Th{sup 232} and U{sup 233} has been measured from 1 to 7 MeV with a target accuracy lesser than 5 per cent. These measurements imply the accurate determination of the fission rate, the number of the target nuclei as well as the incident neutron flux impinging on the target, the latter has been obtained using the elastic scattering (n,p). The cross section of which is very well known in a large neutron energy domain ({approx} 0,5 % from 1 eV to 50 MeV) compared to the U{sup 235}(n,f) reaction. This technique has been applied for the first time to the Th{sup 232}(n,f) and U{sup 233}(n,f) cases. A Hauser-Feshbach statistical model has been developed. It consists of describing the different decay channels of the compound nucleus U{sup 234} from 0,01 to 10 MeV neutron energy. The parameters of this model were adjusted in order to reproduce the measured fission cross section of U{sup 233}. From these parameters, the cross sections from the following reactions could be extracted: inelastic scattering U{sup 233}(n,n'), radiative capture U{sup 233}(n,{gamma}) and U{sup 233}(n,2n). These cross sections are still difficult to measure by direct neutron reactions. The calculated values have allowed us to fill the lack of experimental data for the major fissile nucleus of the thorium cycle. (author)

    16. Study of the excited {Delta} resonance ways of decay in {sup 4}He and other nuclei with the ({sup 3}He,T) reaction at 2 GeV; Etude des voies de decroissance de la resonance {Delta} excitee dans l`{sup 4}He et d`autres noyaux par la reaction ({sup 3}He,T) a 2 GeV

      Energy Technology Data Exchange (ETDEWEB)

      Tarle-Rousteau, S

      1995-05-10

      This thesis describes the ({sup 3}He,t) experiment carried out at 2 GeV at the Saturne National Laboratory (CEA Saclay, France) on {sup 1}H, {sup 2}H, {sup 4}He, {sup 12}C and {sup 208}Pb targets. The charged particles (pions and/or protons) from the {Delta} resonance deexcitation are detected in coincidence with triton using the Diogene large angle detector. New informations are obtained on the ways of {Delta} resonance decay in nuclei. Three modes of decay are investigated: the quasi-free decay, the {Delta}N into NN absorption and the coherent pions production. Modifications of {Delta} resonance properties in nuclei with respect to those of free {Delta} are analysed using the experimental results about pions diffusion, photons absorption, charge exchange reaction and {Delta}-hole model conclusions. The quasi-deuteron absorption process on {sup 4}He is studied using a Monte-Carlo simulation. Coherent pions production is also analysed in detail on {sup 4}He and {sup 12}C target nuclei. The process is very sensitive to {Delta}-hole correlations involved in the longitudinal spin canal which shifts the nucleus response in the {Delta} resonance region towards the low transferred energies. (J.S.). 85 refs., 72 figs., 10 tabs., 1 annexe.

    17. Contribution to the study of mesons and their interactions with nuclei, by threshold production in low nucleon number systems; Contribution a l`etude des mesons et de leur interaction avec les noyaux, par production au seuil dans les systemes a petit nombre de nucleons

      Energy Technology Data Exchange (ETDEWEB)

      Roudot, F

      1995-01-01

      The threshold excitation function of the pd {yields} {sup 3}HeX reaction and the total {eta}-meson production cross section near threshold in the dd {yields} {alpha}{eta} reaction have been measured using the SPES4 beam line of the Laboratoire National Saturne. In the pd {yields} {sup 3}HeX threshold function, clear signals are observed at {omega}, {eta}` and {phi}6 mesons threshold; some structures appear at central masses of the a{sub 0} and f{sub 0}-mesons, as just above the two kaons production threshold. These structures could be the signature of new hadronic exotic states. The two-pion and two-kaon physical background has been estimated in a one-pion exchange model allowing the calculation of the differential cross section for the {pi}{sup -}p {yields} nX elementary process. The results of this calculation of the physical background of the threshold excitation function. The the dd {yields} {alpha}{eta} study, the {eta}-meson was clearly observed in the spectrometer`s final focal plane spectra, in good agreement with a Monte Carlo simulation. A total cross section of the order of the nano-barn has been measured. The results are compared to some other {eta}-meson production processes with lighter nuclei than helium-4. Using different nuclei a comparative study of the {eta}-nucleus interaction has shown that the latter is more binding in the helium-4 case. Based on these data, the charge symmetry breaking in the dd {yields} {alpha}{pi}{sup 0} reaction is studied. Using a {pi}{sup 0}-{eta} mixing model, the extracted cross sections are compatible with the only measurement of this reaction cross section. (author). 59 refs.

    18. Analysis of carboxylesterase 2 transcript variants in cynomolgus macaque liver.

      Science.gov (United States)

      Uno, Yasuhiro; Igawa, Yoshiyuki; Tanaka, Maori; Ohura, Kayoko; Hosokawa, Masakiyo; Imai, Teruko

      2018-04-27

      Carboxylesterase (CES) is important for the detoxification of a wide range of drugs and xenobiotics. In this study, the hepatic level of CES2 mRNA was examined in cynomolgus macaques used widely in preclinical studies for drug metabolism. Three CES2 mRNAs were present in cynomolgus macaque liver. The mRNA level was highest for cynomolgus CES2A (formerly CES2v3), much lower for cynomolgus CES2B (formerly CES2v1) and extremely low for cynomolgus CES2C (formerly CES2v2). Most various transcript variants produced from cynomolgus CES2B gene did not contain a complete coding region. Thus, CES2A is the major CES2 enzyme in cynomolgus liver. A new transcript variant of CES2A, CES2Av2, was identified. CES2Av2 contained exon 3 region different from wild-type (CES2Av1). In cynomolgus macaques expressing only CES2Av2 transcript, CES2A contained the sequence of CES2B in exon 3 and vicinity, probably due to gene conversion. On genotyping, this CES2Av2 allele was prevalent in Indochinese cynomolgus macaques, but not in Indonesian cynomolgus or rhesus macaques. CES2Av2 recombinant protein showed similar activity to CES2Av1 protein for several substrates. It is concluded that CES2A is the major cynomolgus hepatic CES2, and new transcript variant, CES2Av2, has similar functions to CES2Av1.

    19. Measurement of resonance parameters of cross-sections affecting fast-neutron propagation in various media; Mesure des parametres de resonance de sections efficaces lies a la propagation des neutrons dans differents milieux; Izmerenie parametrov rezonansnoj struktury sechenij, vliyayushchikh na rasprostranenie bystrykh nejtronov v sredakh; Medicion de los parametros de resonancia de las secciones eficaces que afectan a la propagacion de los neutrones rapidos en distintos medios

      Energy Technology Data Exchange (ETDEWEB)

      Nikolaev, M N; Filippov, V V; Bondarenko, I I [Academy of Sciences, Moscow, Union of Soviet Socialist Republics (Russian Federation)

      1962-03-15

      une grande influence sur la propagation des neutrons dans la matiere va de plusieurs dizaines de keV, pour les noyaux lourds, a plusieurs dizaines de MeV pour les noyaux intermediaires. Pour evaluer les effets de resonance lors du calcul des parametres de groupes, il faut connaitre non seulement les sections efficaces d'interaction moyenne entre les neutrons et la matiere, mais aussi certaines valeurs telles que (1/{Sigma}{sub t}), (1/{Sigma}{sub t}{sup 2}), etc. - les signes () signifiant que l'on prend la moyenne du groupe d'energie. Actuellement, les donnees dont on dispose sur les parametres de resonance dans le domaine des neutrons rapides ne sont pas suffisantes pour calculer ces moyennes avec la precision necessaire. A cet egard il est interessant de mesurer directement les moyennes (1/{Sigma}{sub t}), (1/{Sigma}{sub t}{sup 2}) et d'autres caracteristique s analogues. Les auteurs decrivent les resultats obtenus par la mesure d'un certain nombre de parametres tels que ({Sigma}{sub t}), ({Sigma}{sub t}{sup 2}), (1/{Sigma}{sub t}), (1/{Sigma}{sub t}{sup 2}), (1/{Sigma}{sub t}{sup 3}), etc. qui caracterisent la structure de la section efficace de divers noyaux intermediaires dans une gamme d'energie allant de 300 keV a 3 MeV. On est parvenu a mesurer ces moyennes par une analyse des courbes de transmission obtenues grace a une bonne configuration geometrique pour des taux de transmission allant jusqu'a {approx}10{sup -2}. Les donnee recueillies montrent que les effets de resonance influent fortement sur les caracteristiques de diffusion de la matiere. (author) [Spanish] En el planteo de los sistemas de constantes que intervienen en la teoria de los multigrupos para el calculo de reactores de neutrones rapidos y de neutrones intermedios, es preciso considerar en muchos casos los efectos de autoblindaje relacionados con la estructura resonante de las secciones eficaces. El intervalo energetico dentro del cual la resonancia ejerce una influencia decisiva sobre la

    20. Caractérisation de composites supraconducteurs aléatoires - phases au bismuth/argent : contribution à l'étude des jonctions faibles dans ces matériaux

      OpenAIRE

      Antunes , Laurent

      1998-01-01

      Les oxydes supraconducteurs à température critique élevée, à base de bismuth et comportant 2 ou 3 plans cuivre, sont synthétisés suivant diverses méthodes. Nous réalisons ensuite l'élaboration par frittage de matériaux composites aléatoires, constitués d'une dispersion de grains supraconducteurs de phase au bismuth 2212 dans une matrice d'argent. Nous étudions la résistivité électrique et l' aimantation en effet d'écran des matériaux en fonction de la température, du champ magnétique et de la...

    1. The ımpact of benefıts and servıces on manager engagement and manager retentıon ın tourısm ındustry: Enhanced by the effect of management level

      OpenAIRE

      ALDATMAZ, Ipek; AYKAÇ, Cansu; DICLE, Ülkü

      2017-01-01

      Manager engagement and retention are vital to the success and organizational performance of many service sector organisations. Maintaining manager retention is a major challenge that many hotel enterprises face today. It is critical that organizations give greater importance to manager engagement, motivation and retention and therefore establish an efficient benefits and services strategy for retaining these core managers for the persistence and achievement of the organization...

    2. Caractérisation botanique et agronomique de trois espèces de cucurbites consommées en sauce en Afrique de l'Ouest : Citrullus sp., Cucumeropsis mannii Naudin et Lagenaria siceraria (Molina Standl

      Directory of Open Access Journals (Sweden)

      Zoro Bi I.A.

      2003-01-01

      Full Text Available Botanical and agronomical characterisation of three species of cucurbit consumed as sauce in West Africa: Citrullus sp., Cucumeropsis mannii Naudin and Lagenaria siceraria (Molina Standl. There are in Côte d'Ivoire at least five species of cucurbit incorrectly called ""pistaches"" in town and cultivated at small scale by women for their oleaginous seeds that are a great importance in the sociocultural live of several peoples. Nevertheless, few studies aimed at the improvement of these plants (related notably to taxonomy, genetic resources collecting missions, genetic characterisation, agronomic evaluation, and selection have been carried out. In order to set up a list of reliable traits that should be examined easily during and after collecting missions, we carry out in the present study, for three species (Citrullus sp., Cucumeropsis mannii Naudin and Lagenaria siceraria (Molina Standl a botanic description and an analysis of eleven agronomic traits: 100-seeds weight, germination rate, seedlings emergence time, matured fruit weight, matured fruit decomposition time, mean number of seeds per fruit, seeds shape, fruit diameter, fruit interior cavity diameter, flowering time, and fruiting time. Statistical analyses using nine of these traits showed that the three species can be completely distinguished with six traits whereas the three other traits allowed partial distinction. Low yields have been observed for the three species: 11.41 kg/ha of decorticated seeds for C. mannii, 18.51 kg/ha for Citrullus sp. and 75.14 kg/ha for L. siceraria. From the observed yield components, the possibilities to improve the production of these cucurbits are discussed.

    3. Identité et écologie des espèces forestières commerciales d'Afrique centrale : le cas de Milicia spp. (synthèse bibliographique

      Directory of Open Access Journals (Sweden)

      Daïnou, K.

      2012-01-01

      Full Text Available Identity and ecology of Central African timber tree species: the case of Milicia spp., a review. Iroko designates the two African tree species Milicia excelsa (Welw. C.C.Berg and Milicia regia (A.Chev. C.C.Berg known as highly valuable in the timber trade. Despite its economical importance and a decrease in population densities due to exploitation, there is a significant lack of ecological and sylvicultural knowledge required for a sustainable management of iroko. In West Africa, M. excelsa has received more attention from scientists than M. regia, but several topics clearly need further investigations or outcomes cannot be transferred in the context of Central African rainforests. A first thing to verify is whether speciation really occurred in the genus Milicia: morphological differences between the two species are very low, and a revision in this genus may lead to some rearrangements of conservatory and management policies related to this taxonomic group. Furthermore, (i patterns related to the reproductive phenology and its controlling factors, (ii gene flow among and between populations and individuals regarding life history traits, influence of human activities and paleoecological perturbations, and (iii dynamics of seedling populations are among aspects that require emphasis in order to propose efficient tools for forest managers. Unless scientists provide these crucial data, the abundance of iroko in tropical rainforests will only depend on expensive plantations activities.

    4. Etude de l’hybridation inter-spécifique entre espèces du genre Coffea en Nouvelle-Calédonie : distribution des niches favorables et structuration de la diversité

      OpenAIRE

      Gomez , Céline

      2009-01-01

      Coffee trees are originated from inter-tropical forests of Africa and Madagascar and their diversification origin areas are highly threatened. Among the 103 species of the Coffea genus, only three are cultivated: C. arabica, C. canephora and C. liberica. C. canephora has the widest natural distribution in tropical African forests, and its genetic diversity is structured in five distinct groups. The study of the genetic diversity structuring has revealed a particular importance of the Dahomey ...

    5. Modification of non metallic materials under the influence of the radiation and thermal retrogradation of these modifications; Modification de materiaux non metalliques sous l'influence des rayonnements et retrogradation thermique de ces modifications

      Energy Technology Data Exchange (ETDEWEB)

      Mayer, G; Perio, P; Gigon, J; Tournarie, M [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

      1955-07-01

      The action of the radiation on solids constitute an extremely vast domain of study, which the CEA hardly begins. There is not a very long time, indeed, that we have relatively intense fluxes (6.10{sup 12} thermal neutrons by cm{sup 2}.s{sup -} {sup 1} in the center of the reactor core of Saclay). Materials submitted to radiations, were followed by the evolution of a certain number of physical properties. The study of thermal retrogradation, at moderate temperature, of the modifications provoked by the irradiation were also followed. We will limit, in this report, to expose our experiences on graphite and lithium fluoride. (M.B.) [French] L'action des rayonnements sur les solides constitue un domaine extremement vaste dont l'etude, au Commissariat a l'Energie Atomique, commence a peine. Il n'y a pas tres longtemps, en effet, que nous disposons de flux relativement intenses (6.10{sup 12} neutrons thermiques par cm{sup 2}.s{sup -1} au centre de la pile de Saclay). Dans les materiaux soumis au rayonnement nous suivons l'evolution d'un certain nombre de proprietes physiques et nous etudions la retrogradation thermique, a temperature moderee, des modifications provoquees par l'irradiation. Nous nous bornerons ici a exposer nos experiences sur le graphite et le fluorure de lithium. (M.B.)

    6. Defensa de lo local en Nuestra América y Coney Island de José Martí: el ensayo como un espacio para la ideología dentro de las raíces hispanoamericanas

      Directory of Open Access Journals (Sweden)

      Ángel, Roberto

      2015-08-01

      Full Text Available José Martí proposes that for the proper development of the Republic in America it is essential to secure a government that has as the premises of its administration the natural categories of its origin. To evaluate the local characteristics Martí was thinking of I will carry out an analysis of two of his essays: Nuestra América (Martí, 1977 and Coney Island (Martí, 1881, in an attempt to unravel the polarisation strategy which supports his argument. Indeed, through a semantic axis the author places the concepts of nature and interiority over external and foreign, making a parallel between what he calls “natural men in America” and those who represent the “other”, the people of the United States. In this way, it will be possible to see how Martí will question the alleged hegemony of the northern country, claiming the primitive qualities of American indigenous peoples, to condition the problem of allocation of barbarism. The main theoretical framework to address this work is the use of the theories of discourse analysis of Teun van Dijk, which will serve me to develop and analyse the semantic axis that Martí creates in the works studied.José Martí propone que para el buen desarrollo de la República en América es indispensable un gobierno que fije como premisas para su administración las categorías naturales y autóctonas de su origen. Para apreciar cuáles son las características locales pensadas por Martí llevaré a cabo un análisis de dos de sus ensayos: Nuestra América (Martí, 1977 y Coney Island (Martí, 1881, con la intención de desentrañar la estrategia de polarización que da sustento a su argumentación. En efecto, el autor a través de un eje semántico sitúa los conceptos de naturaleza e interioridad por sobre lo externo y lo foráneo, realizando un paralelo entre lo que él llama “los hombres naturales de América” y aquellos que representarían a los “otros”, es decir a los habitantes de los Estados Unidos de América. De esta forma será posible evidenciar cómo Martí cuestionará la supuesta hegemonía del país del norte, reivindicando las cualidades primitivas de los pueblos originarios americanos, para condicionar el problema de adjudicación de la barbarie. El principal marco teórico para abordar este trabajo corresponde al empleo de las teorías del análisis del discurso de Teun van Dijk, las cuales me servirán para desarrolla y analizar el eje semántico que crea Martí en las obras estudiadas.

    7. L'oeuvre théâtrale de Didier-Georges Gabily : poétique d'une mémoire en pièces

      OpenAIRE

      Leroy , Séverine

      2015-01-01

      This thesis covers the work of French writer and stage director Didier-Georges Gabily (1955-1996), his published and unpublished texts as well as production archives and interviews with his actors and collaborators. The perspective is that of a poetics of memory, a disenchanted vision of contemporary society that transpires out of the confrontation of the past with the present, resulting in the deconstruction of myths in contemporary dramatic space, be they myths bequeathed by former director...

    8. Les sources du Moyen Atlas et de Rif (Maroc): Faunistique (description de deux espèces nouvelles de Trichoptères), écologie, intérêt biogéographique

      NARCIS (Netherlands)

      Giudicelli, Jean; Dakki, Mohamed

      1984-01-01

      Seven springs in the Middle Atlas and five in the Rif have been studied. These show a great diversity of crenal habitats: water temperature ranges from 8.7° to 21°C, and the flow from 1 l/s to 1,800 l/s. Based on hydrologic and thermic characteristics, a spring typology is provided. The invertebrate

    9. EVALUACIÓN DE LA CINÉTICA DE ADSORCIÓN DE Zn2+ Y Cd2+ A PARTIR DE SOLUCIONES UNITARIAS Y BINARIAS POR RAÍCES DE Eichhornia crassipes Y Typha latifolia

      Directory of Open Access Journals (Sweden)

      Carolina Martínez

      2013-01-01

      Full Text Available In this work, the kinetic modeling of adsorption of Zn 2+ and Cd2+ in roots of Typha latifolia (cattail and Eichhornia crassipes (water hyacinth were evaluated. The study was done using solutions containing one or both ions. The experiments were performed using carbon paste electrodes modified with the roots. The model that best describes the kinetics of both ions in the two roots is the pseudo second order’s one. We also determined that both ions accumulate faster and in greater amounts on Eichhornia crassipes. Indeed, according to potentiometric titration and infrared spectra Fourier transformation, the number of adsorption sites is higher in this root. In the same manner, it was shown that both roots accumulate more Cd 2+ than Zn2+, and when the adsorption is made from a mixture, cadmium inhibits the accumulation of zinc.

    10. Réécriture des pièces de Shakespeare : l’enjeu de la modernité ? Rewriting Shakespeare’s Plays: the Challenge of Modernity?

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      Estelle Rivier

      2009-06-01

      Full Text Available Shakespeare’s works remain a reference when artists — either playwrights or stage professionals — aim at philosophising on human nature. These artists use the Shakespearean material to give vent to their own imagination and critical approach to the world they live in. Not surprisingly, Shakespeare’s plays have constantly been adapted on stage and in the cinema to comment upon contemporary facts and to voice either political or social concerns. But the same plays have also been the pretexts for other plays, written in modern English so as to serve new prospects. This study is based on the work of three twentieth-century writers – Arnold Wesker, Edward Bond and Tom Stoppard – who rewrote Shakespearean plays: The Merchant of Venice (The Merchant, 1977, King Lear (Lear, 1972 and Hamlet (Rosencrantz and Guildenstern are Dead, 1967. This article explores the way these plays were elaborated with reference to the original versions and why their authors decided to adapt the Elizabethan text.

    11. Croissance en pots de quatre espèces végétales sur des substrats enrichis avec la terre de termitières de Cubitermes

      Directory of Open Access Journals (Sweden)

      Mokossesse, JA.

      2009-01-01

      Full Text Available Growth Study in Pots of Various Plants Species on Substrates Enriched by Termite Mounds Cubitermes. The different parts of Cubitermes mounds (cap, trunk and base from Burkina Faso were analyzed and proved to be richer in available phosphorus, carbon and NO3-N and much richer in NH4-N than the surrounding soil. Their possible stimulating effect was tested on the seedling's growth of four species: Acacia holosericea (A. Cunn. ex G. Don., Acacia raddiana (Sav., Crotalaria ochroleuca (G. Don. and Sorghum sp. (L. during 47 days. An acceleration of growth is observed for Sorghum on the substrates containing powder 50% of cap or column. This acceleration becomes significant only from 26 days. A similar growth is observed for Crotalaria but as from 40 days.

    12. EVALUACIÓN DE UN SISTEMA in vitro PARA ESTUDIOS DE Spongospora subterranea f. sp. subterranea EN RAÍCES DE PAPA (Solanum tuberosum subsp. andigena L.) Var. DIACOL CAPIRO

      OpenAIRE

      JULIANA SOLER-ARANGO; WILFREDO BENAVIDEZ; ELIZABETH GILCHRIST-RAMELLI; JUAN GONZALO MORALES; JUAN CARLOS PÉREZ-NARANJO

      2012-01-01

      La papa es uno de los principales cultivos de importancia a nivel mundial. Según la Cadena Agroalimentaria de la papa de Colombia, la sarna polvosa está dentro de los siete principales problemas fitosanitarios de este cultivo en las zonas productoras. La enfermedad es causada por el patógeno Spongospora subterranea, que disminuye la producción y calidad de los tubérculos. La naturaleza obligada del patógeno  imposibilita su aislamiento y el mantenimiento de cepas, dificultando su investigació...

    13. Evaluation in vitro de l'activité antagoniste d'isolats de Trichoderma harzianum Pers. contre trois espèces fongiques pathogènes de l'oignon au Burkina Faso

      Directory of Open Access Journals (Sweden)

      Dabire, TG.

      2016-01-01

      Full Text Available In vitro Evaluation of Antagonistic Activity of Trichoderma harzianum Pers. Isolates against Three Fungal Species Pathogens of Onion in Burkina Faso. The antagonistic effect of five Trichoderma harzianum Pers. isolates of which four from Burkina Faso and one from South Africa was evaluated in vitro against Aspergillus niger van Tieghem, Fusarium oxysporum f.sp. cepae Schlecht. Emend. Snyd & Hans and Fusarium solani (Mart. Sacc. regarded as the main onion fungal pathogens in Burkina Faso. The fungal pathogens species and T. harzianum isolates were directly confronted in Petri dishes for seven days. The pathogen radial growth in presence or absence of antagonist was measured. The two isolates with the highest antagonism rates were grown with each pathogen in confrontation at distance. The culture took place in two Petri dishes sealed with parafilm for seven days. The radial growth of each pathogen was measured. All isolates of T. harzianum inhibited the fungal pathogens growth with antagonism ratio ranging from 0.61 to 0.93 and 0.01 to 0.24 respectively by direct and remote confrontation. The isolates ThTab from Burkina Faso and ThAfs from South Africa showed the best antagonism effect and a myco-parasitic action on all tested pathogens. The antagonistic action modes of these isolates and their possible biological control use are discussed.

    14. Relations pondérales entre l’encéphale et le corps chez les chiroptères. II. Espèces paléo-tropicales et paléarctiques. Discussion et conclusions

      NARCIS (Netherlands)

      Pirlot, Paul

      1970-01-01

      The ratio brain weight/body weight is studied in 30 species of bats from Asia, Africa and Europe, in comparison with 20 other species from South America dealt with in a previous paper. The simple encephalic ratios, expressed in o/oo, vary considerably and about between the same limits on the four

    15. Des élèves de 9-12 ans de l’école primaire française et l’évolution des espèces vivantes

      Directory of Open Access Journals (Sweden)

      CORINNE JÉGOU-MAIRONE

      2011-07-01

      Full Text Available Teaching the evolution of the living species, a key concept in modern biology, is today at the heart of many studies within the French and international educational systems, from primary school to university. It may indeed go against religious beliefs and thus stir up controversy. In some cases, these beliefs may even become an obstacle to the learning of this concept. A compulsory element in the French primary curriculum until 2008, it seems however that this concept hasn’t been given much importance in schools. Firstly, we shall study the official requirements in the primary curriculum and we shall identify institutional expectations. Secondly, a written questionnaire will aim to define the personal relationship primary teachers in Keystage 3 (year 4, 5, 6 at primary level and student teachers have with the concept of evolution, inside and outside the classroom, and how this relationship might influence their decision to teach or not evolution, or the way they would teach it (Mairone, 2007; Mairone & Dupin, 2007, 2008. Thirdly, a written questionnaire submitted to Keystage 3 pupils will enable us to disclose their representations on the questions of the emergence and evolution of the living species; it will help to define learning barriers and appropriate didactic engineering. This is the subject of this proposition. This whole study is meant to make recommendations for teaching/learning of evolution of living species for primary school and for teachers training.

    16. Description du système racinaire de trois espèces fourragères en zone soudano-sahélienne: Andropogon gayanus, Vigna unguiculata et Stylosanthes hamata

      OpenAIRE

      Groot, J.J.R.; Traoré, M.; Koné, D.

      1998-01-01

      Description of root systems of three fodder crops in the Soudano-Sahelian area: Andropogon gayanus, Vigna unguiculata and Stylosanthes hamata. Root systems of fodder crops (Andropogon gayanus, Vigna unguiculata and Stylosanthes hamata) were studied at two Research Stations in Mali in 1992, using soil monoliths. In this method, roots are studied throughout the soil profile in cubical compartments of 1 dm3. Root biomass production of A. gayanus planted in 1951 was 4 t.ha-1 against 5 t.ha-1 ...

    17. In vitro Antifungal Activity of Various Local Plant Extracts in the Control of Phoma sorghina (Sacc. Boerema et al. and Colletotrichum graminicola (Ces. Wilson, as Sorghum Seed Mold Pathogen in Burkina Faso

      Directory of Open Access Journals (Sweden)

      Bonzi, S.

      2012-01-01

      Full Text Available The use of phytosanitary products is becoming increasingly restricted, due to their high cost, as well as the unavailability of certain products on the local market and their damaging effects on the environment and health. These different reasons motivated the search for alternative solutions to the use of synthetic pesticides. On this basis, we took on the task of evaluating the anti-fungal effectiveness of aqueous plant extracts from Balanites aegyptiaca, Cymbopogon citratus, Cassia occidentalis and Portulaca oleracea. These extracts, at 30% concentration, were obtained after different maceration periods (6, 12, 24 and 48 hours and tested in vitro against Colletotrichum graminicola and Phoma sorghina. The effect of the extracts on the mycelium growth of various fungi, when evaluated 10 days after incubation (DAI, shows that extracts of C. citratus, B. aegyptiaca, P. oleracea and C. occidentalis inhibit the growth of C. graminicola by 100%, 65%, 43% and 38%, respectively. The extract of C. citratus prevents the development of C. graminicola, regardless of the maceration period. This extract produces a greater inhibitory effect than the fungicide Calthio DS (20% Lindane and 25% Thirame. Compared to P. sorghina, inhibition percentages of 100, 72 and 16 were recorded for extracts of C. citratus, P. oleracea and C. occidentalis. However, extracts of C. citratus (macerated for 24 and 48 hours and extract of P. oleracea (macerated for 48 hours were more effective than the other extracts.

    18. Situación Higiénico – Sanitaria de las “Huecas” participantes de la Feria Gastronómica Internacional Raíces 2014

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      Alejandro-Morales, Silvia

      2015-12-01

      Full Text Available The research aimed to evaluate the level of compliance with food hygiene by handlers 26 “hollow traditional” participants Estate 2014 International Food Fair, held in Guayaquil, Ecuador. A survey of hygiene food assessment and direct observation applied throughout the food traceability process. The results indicate that 50% of the manipulators are owners of the establishment, 31% are between 20-40 years in office also induce their children to continue with the line of business, 31% between 1-5 years of work. The application of hygiene techniques for both qualitative verification of food, such as conservation, prewash and equipment fulfilled in 89%, and 88% have pre-work training. Ultimately the “hollow” present an acceptable level of food safety because they do not meet all standards of hygiene in frequency, including all staff handles all food traceability process, creating risks of ETA (Borne Diseases Foods. It creates the need to demand and enforce regular food hygiene education programs, which would ensure greater prestige and profitability to the business.

    19. Defensa de lo local en Nuestra América y Coney Island de José Martí: el ensayo como un espacio para la ideología dentro de las raíces hispanoamericanas

      OpenAIRE

      Ángel, Roberto

      2015-01-01

      José Martí proposes that for the proper development of the Republic in America it is essential to secure a government that has as the premises of its administration the natural categories of its origin. To evaluate the local characteristics Martí was thinking of I will carry out an analysis of two of his essays: Nuestra América (Martí, 1977) and Coney Island (Martí, 1881), in an attempt to unravel the polarisation strategy which supports his argument. Indeed, through a semantic axis the autho...

    20. EL ESPECTÁCULO DE LA INTIMIDAD. RAÍCES HISTÓRICAS DE LA COMUNICACIÓN CENTRADA EN EL YO. THE PRIVACY SHOW: HISTORICAL ROOTS OF COMMUNICATION FOCUSED ON THE EGO.

      Directory of Open Access Journals (Sweden)

      Martín Carbajo Núñez.

      2012-12-01

      Full Text Available El presente artículo presenta los resultados de una investigación que gira en torno a la sociedad de la información hoy, las fuertes tensiones a las que está sometida, al tradicional consenso social sobre la modestia y el pudor. La comunicación se centra en el yo íntimo, en los sentimientos, mientras se hace cada vez más frecuente la exhibición descarada de la propia interioridad y una curiosidad morbosa, libre de culpa y castigo. Los medios de comunicación social [=MCS] explotan sin reparos el filón de la intimidad, pisoteando con frecuencia el derecho a la privacidad. Los programas de telerrealidad (reality shows figuran entre los preferidos por la audiencia.This article presents the results of a research that revolves around the Information Society today, the strong tensions to which it is subject, the traditional social consensus on modesty and decency. Communication focuses on the intimate ego and feelings, while it is much more often the blatant exhibition of the own interiority and a morbid curiosity, free of guilt and punishment. The social media [SM] exploit without objection, the gold mine of privacy, often trampling on the right of privacy. Reality T.V. programs (reality shows are among the preferred by the audience.