WorldWideScience

Sample records for faze voloknistogo materiala

  1. Voters not fazed by sleazy reputation of political leaders

    Index Scriptorium Estoniae

    2009-01-01

    Politoloogide uuringust selgus, et Läti ühiskonda ei huvita poliitikute maine. Ventspilsi linnapea Aivars Lembergs pöördus tagasi Roheliste ja Farmerite Liitu ning loodab võita 2010. aasta parlamendivalimisi ja saada peaministriks

  2. Copper welding in solid phase; Svarka medi v tverdoj faze

    Energy Technology Data Exchange (ETDEWEB)

    Avagyan, V Sh

    1993-12-31

    An analysis of the publications on the technology of diffusion welding of copper in solid phase is carried out. The aspects of diffusion welding of copper with silver, aluminium, nickels, chromium, titanium, stainless steel and refractory metals are considered 35 refs.

  3. Conversion of borate ions in liquid phase. Izmenenie sostava borationov v zhidkoj faze

    Energy Technology Data Exchange (ETDEWEB)

    Gode, G K; Bernare, A A [Latvijskij Gosudarstvennyj Univ., Riga (USSR)

    1989-01-01

    Isomolar series of aquepus solutions of magnesium chloride and potassium tetraborate at 25 deg C are investigated by the refractometry method. It is established that inderite containing triborate-ion is crystalized from solutions of rather high concentration. In 0.1 M solution reagents form supersaturated solutions with the decreased refractive index against the calculated one. It is supposed that this deviation is caused by partial transformation of tetraborate-ion to triborate-ion under the magnesium ion effect.

  4. Carbon dioxide capture using covalent organic frameworks (COFs) type material-a theoretical investigation.

    Science.gov (United States)

    Dash, Bibek

    2018-04-26

    The present work deals with a density functional theory (DFT) study of porous organic framework materials containing - groups for CO 2 capture. In this study, first principle calculations were performed for CO 2 adsorption using N-containing covalent organic framework (COFs) models. Ab initio and DFT-based methods were used to characterize the N-containing porous model system based on their interaction energies upon complexing with CO 2 and nitrogen gas. Binding energies (BEs) of CO 2 and N 2 molecules with the polymer framework were calculated with DFT methods. Hybrid B3LYP and second order MP2 methods combined with of Pople 6-31G(d,p) and correlation consistent basis sets cc-pVDZ, cc-pVTZ and aug-ccVDZ were used to calculate BEs. The effect of linker groups in the designed covalent organic framework model system on the CO 2 and N 2 interactions was studied using quantum calculations.

  5. Razvoj mikrostrukture pri izdelavi gradientnega materiala H13-Cu s tehnologijo LENS

    OpenAIRE

    Artiček, Uroš

    2014-01-01

    Tehnologija LENS predstavlja sodobno dodajalno tehnologijo nanašanja kovinskih materialov. Prikazana je idejna zasnova uporabe visokotehnoloških materialov v orodjih za brizganje umetnih mas ter orodjih za tlačno litje lahkih kovin in njihovih zlitin, izdelanih z omenjeno tehnologijo. V praksi se pogosto zgodi, da pride med strjevanjem do odstopanj dimenzijskih in oblikovnih toleranc izdelka zaradi neenakomerne porazdelitve temperature v orodju ter posledično v izdelku med ohlajanjem. Hkrati ...

  6. Investigation of biological material for metallic poisoning by the fractional method. Issledovaniya biologicheskogo materiala na metallicheskiya yady drobnym metodom

    Energy Technology Data Exchange (ETDEWEB)

    Krylova, A.N.

    1975-01-01

    A fractional method is developed for analysis of biological material for the presence of toxic quantities of Pb, Hg, Ba, Mn, Cr, Ag, Cu, Sb, Tl, As, Bi, Cd and Zn. The method satisfies the requirements of medical forensic toxicology. (Ref. Zh.)

  7. Radiation Polymerization in the Solid Phase; Polymerisation radiochimique en phase solide; Radiatsionnaya polimerizatsiya v tverdoj faze; Radiopolimerizacion en fase solida

    Energy Technology Data Exchange (ETDEWEB)

    Barkalov, I. M.; Gol' danskij, V. I.; Enikolopov, N. S.; Terekhova, S. F.; Trofimova, G. M.

    1963-11-15

    The radiation polymerization of solid and frozen monomers has recently attracted a great deal of attention because of its theoretical and practical importance in chemical kinetics and radiation chemistry. The strict spacing of monomer units in a polymer brings about a sharp improvement in the physico-chemical properties without any change of chemicai composition. In the synthesis of stereo-regular polymers, the matrix principle is used, i.e. the monomer unit is strictly oriented spatially by the formation of a complex with a catalyst or some other compound. In the radiation polymerization of a number of monomers oriented in clathrate complexes of urea and thio-urea, for instance, crystal stereo-regular polymers were obtained. The simplest variation, however, is the orientation of a monomer in its own crystal lattice. Although many of the theoretical questions involved remain obscure, the technique is extremely promising. Thus, highly crystalline polyoxymethylene has already been obtained by the radiation polymerization of crystalline trioxane. Nevertheless, a more detailed theoretical investigation of the technique is required. For each separate monomer, the contribution to the general picture made by the different types of reaction taking place during irradiation and the subsequent fusion of the solid monomers (specific radiation reaction, post-polymerization and polymerization at phase transition points) needs clarification. Recent detailed research at the Institute of Chemical Physics, USSR, into the solid-phase radiation-polymerization kinetics of a number of monomers, using the calorimetric method and an EPR signal, has revealed the essential role of the specific radiation reaction during the irradiation. The polymerization process for acrylonitrile (from -196{sup o}C to -140{sup o}C) and vinyl acetate (-196{sup o}C to -100{sup o}C) ceases when irradiation is discontinued despite the retention of the shape and intensity of the EPR signal and despite the long lifetime of the irradiationproduced ions. The results of these experiments indicate the potentially considerable role of short-lived excited states in the radiation solid-phase polymerization of a number of monomers. Such ''under-beam'' polymerization occurs in practice without activation energy, unlike slow post-polymerization, which occurs with the same activation energy as does the liquid phase process. (author) [French] La polymerisation radiochimique des monomeres a l'etat solide et congele fait l'objet depuis quelque temps d'une attention soutenue. Cette question presente un grand interet tant du point de vue pratique qu'en ce qui concerne les theories modernes de la cinetique chimique et de la radiochimie. On sait qu'une configuration speciale strictement ordonnee des unites monomeriques dans le polymere provoque une amelioration sensible des proprietes physico-mecaniques sans que la composition chimique s'en trouve alteree. Pour realiser la synthese de polymeres a structure spatiale reguliere, on fait appel au principe de la matrice; en d'autres termes, l'unite monomerique est nettement orientee dans l'espace par la formation d'un complexe a l'aide d'un catalyseur ou de toute autre substance appropriee. Ainsi, lors de la polymerisation radiochimique de plusieurs monomeres orientes dans des clathrates de l'uree ou de la thio-uree, on a obtenu des polymeres cristallins a structure spatiale reguliere. Cependant, l e procede le plus simple consiste a orienter le monomere dans son propre reseau cristallin. Bien que de nombreuses questions theoriques soient encore a elucider dans ce domaine, l'application de la methode mentionee est fort seduisante. Ainsi, la polymerisation radiochimique du trioxyethylene cristallise a deja permis d'obtenir un polyoxymethylene fortement cristallise. Cependant, cette methode necessite une etude theorique plus approfondie. Pour chaque monomere, il est indispensable de determiner dans quelle mesure les divers types de reactions qui s'operent lors de l'irradiation et de la fusion consecutive des monomeres solides (reaction radiochimique specifique, post-polymerisation et polymerisation aux points de transition d'une phase a l'autre) contribuent a l'ensemble du processus. Les travaux approfondis sur la cinetique de la polymerisation radiochimique qui ont ete faits recemment par la methode calorimetrique et l'observation du signal RPE a l'Institut de physique chimique ont montre qu'un role essentiel incombe a la reaction radiochimique specifique qui s'opere durant l'irradiation. Des que l'irradiation est interrompue, le processus de polymerisation de l'acrilonitryle (entre-196 et -140{sup o}C) et de l'acetate de vinyle (entre-196 et -100{sup o}C) s'arrete bien que le signal RPE conserve sa forme et son intensite et que les ions crees sous l'action des rayonnements aient une duree de vie prolongee. Les resultats de ces experiences laissent supposer que les etats d'oxydation de courte duree peuvent jouer un role important dans l a polymerisation radiochimique de certains monomeres en phase solide. Une telle polymerisation ''sous le faisceau'' s'opere pratiquement sans aucune energie d'activation contrairement a la polymerisation lente qui se fait avec la meme energie d'activation que le processus en phase liquide. (author) [Spanish] Ultimamente se viene concediendo gran atencion a la radiopolimerizacion de monomeros solidos y ''congelados''. Este problema revista interes practico y teorico por lo que respecta a las nuevas teorias de la cinetica quimica y la radioquimica. Commo se sabe, una configuracion espacial estrictamente ordenada de las unidades monomericas en un polimero mejora de manera considerable sus propiedades fisico-mecanicas sin alterar su composicion quimica. Para la sintesis de los polimeros de estructura espacial regular, se aplica el principio de la matriz, es decir que se orienta netamente en el espacio la unidad monomerica por medio de la formacion de un complejo con ayuda de un catalizador u otra sustancia adecuada. Por ejemplo, en la radiopolimerizacion de una serie de monomeros orientados en complejos clatraticos de urea y tiourea, se obtienen polimeros cristalinos de estructura espacial regular. Sin embargo, el procedimiento mas sencillo consiste en orientar el monomero en el propio reticulado cristalino. Aunque todavia quedan por dilucidar numerosos aspectos teoricos de esta cuestion, la aplicacion practica del metodo parece sumamente promisoria. Asi, en la radiopolimerizacion del trioxietileno cristalino, se obtiene un polioximetileno altamente cristalizado. Con todo, es necesario proseguir el estudio teorico de esta cuestion. Para cada monomero resulta indispensable determinar en que medida los distintos tipos de reacciones que se desarrollan durante la irradiacion y la fusion consecutiva de los monomeros solidos (reaccion radioquimica especifica, postpolimerizacion y polimerizacion en los puntos de transicion de las fases) contribuyen al conjunto del proceso. El estudio detallado de la radiopolimerizacion de una serie de monomeros, mediante el metodo calorimetrico y la observacion de la resonancia paramagnetica de los electrones llevada a cabo recientemente en el Instituto de fisicoquimica de Moscu, ha demostrado que la reaccion radioquimica especifica desempefia el papel fundamental en el curso de la irradiacion. Una vez concluida esta, los procesos de polimerizacion del acrilnitrilo (entre -196{sup o}C y -140{sup o}C) y del acetato de vinilo (entre -196{sup o}C y -100{sup o}C) se detienen por mas que las senales de resonancia paramagnetica de los electrones conserven la misma forma e intensidad u por prolongada que sea la duracion de los iones generados por la irradiacion. Los resultados de estos experimentos atestiguan la probable importancia del papel que desempenan los estados excitados de breve duracion en la radiopolimerizacion de una serie de monomeros en fase solida. Esa polimerizacion ''bajo el haz'' se desarrolla practicamente sin energfa de activacion, a diferencia de la postpolimerizacion lenta, que exige la misma energia de activacion que el proceso en fase liquida. (author) [Russian] Radiatsionnoj polimerizatsii tverdykh i zamorozhennykh monomerov za poslednee vremya udelyaetsya bol'shoe vnimanie. EHtot vopros predstavlyaet bol'shoj interes kak s prakticheskoj tochki zreniya, tak i s tochki zreniya novykh teorij khimicheskoj kinetikich radiatsionnoj khimii. Kak izvestno, strogaya prostranstvennaya uporyadochennost' monomernykh edinits v polimere obuslavlivaet rezkoe uluchshenie fiziko-mekhanicheskikh svojstv bez izmeneniya khimicheskogo sostava. Dlya sinteza stereoregulyarnykh polimerov ispol'zuetsya printsip matritsy, t.e. monomernaya edinitsa strogo orientiruetsya v prostranstve putem obrazovaniya kompleksa s katalizatorom ili kakim-libo drugim veshchestvom. Naprimer, pri radiatsionnoj polimerizatsii ryada monomerov, orientirovannykh v klatratnykh kompleksakh mocheviny i tiomocheviny, polucheny kristallicheskie stereopegulyarnye polimery. Odnako naibolee prostym variantom yavlyaetsya orientatsiya monomera v sobstvennoj kristallicheskoj reshetke. Khotya mnogie teoreticheskie voprosy v ehtoj oblasti ostayutsya neyasnymi, prakticheskoe ispol'zovanie ehtogo sposoba ves'ma zamanchivo. Tak, pri radiatsionnoj polimerizatsii kristallicheskogo trioksana uzhe poluchen vysokokristallicheskij polioksimetilen. Trebuetsya, odnako, dal'nejshaya teoreticheskaya razrabotka ehtogo metoda. Neobkhodimo dlya kazhdogo otdel'nogo monomera vyyasnit' vklad razlichnykh vidov reaktsij, proiskhodyashchikh pri obluchenii i posleduptsem plavlenii tverdykh monomerov (spetsificheskaya radiatsionnaya reaktsiya, postpolimerizatsiya i polimerizatsiya v tochkakh fazovykh perekhodov) v obshchuyu kartinu protsessa. Vypolnennoe v poslednee vremya v Institute khimicheskoj fiziki podrobnoe issledovanie kinetiki radiatsionnoj tverdofaznoj polimerizatsii ryada monomerov s primeneniem kalorimetricheskogo metoda i s nablyudeniem signala EHPR pokazalo, chto spetsificheskaya radiatsionnaya reaktsiya v khode oblucheniya igraet sushchestvennuyu rol'. Posle okonchaniya oblucheniya protsessa polimerizatsii akrilonitrila (ot -196{sup o} do -140{sup o}C) i vinilatsetata (ot -196{sup o} do -100{sup o}C) prekrashchaetsya nesmotrya kak na sokhranenie formy i intensivnosti signala EHPR, tak i na bol'shoe vremya zhizni sozdavaemykh oblucheniem ionov. Rezul'taty ehtikh opytov svidetel'stvuyut o vozmozhnoj bol'shoj roli korotkozhivushchikh vozbuzhdennykh sostoyanij v radiatsionnoj tverdofaznoj polimerizatsii ryada monomerov. Takaya polimerizatsiya ''pod puchkom'' proiskhodit prakticheski bez ehnergii aktivatsii - v otlichie ot medlennoj postpolimerizatsii, idushchej s toj zhe ehnergiej aktivatsii, chto i zhidkofaznyj protsess. (author)

  8. Influence of the organic phase property on the extraction of tenoil - trifluoroacetonate uranyl, Annex 6; Prilog 6: Uticaj prirode organske faze na ekstrakciju tenoil - trifluoracetonata uranila

    Energy Technology Data Exchange (ETDEWEB)

    Milic, N; Petruhin, O M; Zolotov, J A [Institute of Nuclear Sciences Boris Kidric, Laboratorija za visoku aktivnost, Vinca, Beograd (Serbia and Montenegro)

    1963-12-15

    This paper describes the study of of uranium (VI) (2.5 10{sup -4}M) extraction from acetate puffer solutions with 0.01 M solution of tenoil trifluoroacetonate in benzene, chloroform, carbon tetrachloride, amyl acetate, cyclohexanon, n-butyl alcohol with the additions of 0.036 M TBP and 2.7 M acetone solution with 0.01 M solution of TTA. It was verified that the extraction depends on the property of the organic phase. Distribution coefficients for uranium when extracted by solvents containing oxygen is higher compared to the distribution coefficients obtained by solvents without oxygen (benzene, chloroform and carbon tetrachloride). TBP cyclohexanon, and acetone additions in the CCl{sub 4} cause more significant increase of distribution coefficients.

  9. Thermal transformations of oxohalide complexes of rhenium(5) and molybdenum(5) with diazo-18-crown-6 in solid phase. Termicheskie prevrashcheniya oksogalogenidnykh kompleksov reniya(5) i molibdena(5) s diaza-18-kraun-6 v tverdoj faze

    Energy Technology Data Exchange (ETDEWEB)

    Ashurova, N Kh; Yakubov, K G [Tadzhikskij Gosudarstvennyj Univ., Dushanbe (Tajikistan)

    1992-11-01

    Methods for synthesis and separation in solid state of the rhenium(5) and molybdenum(5) onium complexes with diaza-18-crown-6(L), the content of which according to the data of elementary analysis, IRS in the close and remote areas, thermogravimetry, conductometry and potentiometry corresponds to the (H[sub 2]L)[EOX[sub 5

  10. Prioritizing stream types according to their potential risk to receive crop plant material--A GIS-based procedure to assist in the risk assessment of genetically modified crops and systemic insecticide residues.

    Science.gov (United States)

    Bundschuh, Rebecca; Kuhn, Ulrike; Bundschuh, Mirco; Naegele, Caroline; Elsaesser, David; Schlechtriemen, Ulrich; Oehen, Bernadette; Hilbeck, Angelika; Otto, Mathias; Schulz, Ralf; Hofmann, Frieder

    2016-03-15

    Crop plant residues may enter aquatic ecosystems via wind deposition or surface runoff. In the case of genetically modified crops or crops treated with systemic pesticides, these materials may contain insecticidal Bt toxins or pesticides that potentially affect aquatic life. However, the particular exposure pattern of aquatic ecosystems (i.e., via plant material) is not properly reflected in current risk assessment schemes, which primarily focus on waterborne toxicity and not on plant material as the route of uptake. To assist in risk assessment, the present study proposes a prioritization procedure of stream types based on the freshwater network and crop-specific cultivation data using maize in Germany as a model system. To identify stream types with a high probability of receiving crop materials, we developed a formalized, criteria-based and thus transparent procedure that considers the exposure-related parameters, ecological status--an estimate of the diversity and potential vulnerability of local communities towards anthropogenic stress--and availability of uncontaminated reference sections. By applying the procedure to maize, ten stream types out of 38 are expected to be the most relevant if the ecological effects from plant-incorporated pesticides need to be evaluated. This information is an important first step to identifying habitats within these stream types with a high probability of receiving crop plant material at a more local scale, including accumulation areas. Moreover, the prioritization procedure developed in the present study may support the selection of aquatic species for ecotoxicological testing based on their probability of occurrence in stream types having a higher chance of exposure. Finally, this procedure can be adapted to any geographical region or crop of interest and is, therefore, a valuable tool for a site-specific risk assessment of crop plants carrying systemic pesticides or novel proteins, such as insecticidal Bt toxins, expressed in genetically modified crops. Copyright © 2015 Elsevier B.V. All rights reserved.

  11. Bioquímica da esquistossomose mansônica: VII. Alterações lipídicas das membranas lisossômicas durante a faze inicial da agressão hepática Biochemistry of schistosomiasis mansoni: VII. Changes of the lipid composition of lynsosomal membranes at the initialphase of liver injury

    Directory of Open Access Journals (Sweden)

    Luiz Erlon Araújo Rodrigues

    1988-03-01

    Full Text Available Com o intuito de se estudarem as alterações nos teores lipídicos, constituintes das membranas lisossômicas, em fígados, durante a fase inicial da agressão esquistossomótica, foram utilizados camundongos infectados com 30 cercárias e 30 dias de infecção. Os triaglicerídios passaram de 200 ± 48 µg/mg de proteínas totais nos controles, para 165 ± 22 µg/mg, nos infectados. Na mesma ordem também diminuiram o colesterol livre de 539 ± 80, para 396 ± 54 µg/mg; os ésteres do colesterol de 270 ± 35, para 216 ± 36 µg/mg e os colinafosfatídios de 44 ± 5,7 para 31 ± 4,9 µg/mg. Os serinafosfatídios, os etanolaminafosfatídios e os esfingofosfatídios aumentaram, respectivamente de 58 ± 9,7 para 60 ± 8,5, de 72 ± 7,8 para 111 ± 15,7 e de 36 ± 4,9 para 63 7,1 µg/mg. Os ácidos graxos livres não se alteram significativamente, passaram de 1,7 ± 0,35 µEq/g, nos controles, para 1,8 ± 0,29 Eq/g nos animais infectados. Esses resultados padecem indicar que na fase inicial de esquistossomose mansônica hepática, antes da formação dos granulomas, são detectadas alterações importantes na constituição lipídica das membranas do compartimento lisossônico. Elas, talvez, sejam devidas a produtos catabólicos, excretados por vermes imaturos ou adultos, presentes em vasos do sistema portal.Aiming at investigating the changes on the lipidic constitution of hepatic lysosomal membranes at the initial phase of schistosomotic damage, mice have been infected with 30 cercarias and employed for essais in the 30th day if infection. The triacyglycerois decreased from 220 ± 48 µg/mg of total proteins in the control mice, to 165 ± 22µg/mg in the infected ones. Similarily, the free cholesterol, also decreased from 539 ± 80 to 396 ± 54 µg/mg; the cholesterol esters from 270 ± 35 to 216 ± 36 µg/mg and the phosphatidylcholines from 44 ± 5,7 to 31 ± 4,9 µg/mg. The phosphatidylserines the phosphatidylethanolamines and the sphingomyelines increased, respectively from 58 ± 9,7 to 60 ± 8,5, from 72 ± 7,8 to 111 ± 15,7 and from 36 ± 4,9 to 63 ± 7,1 µg/mg. The free fatty acids showed no statistical significance on their variations. They varied from 1,7 ± 0,25 µEq/g in the controls to 1,8 ± 0,39 Eq/g in the infected animals. These results indicated that in the initial phase of hepatic schistosomiasis, before the formation of granulomas, important changes on the lipidic constitution of lysosomal membranes can be detected. It seems that they are provoked by the catabolic excreted by immature or adult worms of Schistosoma mansoni present in the portal vein system.

  12. Exploring social recommenders for teacher networks to address challenges of starting teachers

    NARCIS (Netherlands)

    Fazeli, Soude; Drachsler, Hendrik; Brouns, Francis; Sloep, Peter

    2012-01-01

    Fazeli, S., Drachsler, H., Brouns, F., & Sloep, P. B. (2012, 4 April). Exploring social recommenders for teacher networks to address challenges of starting teachers. Presentation at the Eighth International Conference on Networked Learning 2012, Maastricht, The Netherlands.

  13. Suitability of Cadmium Tantalate and Indium Tantalate as Control Materials for High-Temperature Reactors; Le Tantalate de Cadmium et le Tantalate d'Indium Comme Absorbants pour les Reacteurs a Haute Temperature; Vozmozhnosti ispol'zovaniya tantalatov kadmiya i indiya v kachestve kontrol'nogo materiala dlya vysokotemperaturnykh reaktorov; Empleo del Tantalato de Cadmio y del Tantalato de Indio Como Materiales de Control Para Reactores de Alta Temperatura

    Energy Technology Data Exchange (ETDEWEB)

    Preisler, E.; Haessner, F.; Petzow, G. [Max-Planck-Institut fuer Metallforschung, Stuttgart, Federal Republic of Germany (Germany)

    1964-06-15

    Control materials for practical use in high-temperature reactors should, independently of the requirements of the individual case, have the following properties: (a ) high absorption cross-section for neutrons in a wide range of energies; (b ) high absorption capacity for neutrons; (c ) small sensitivity for radiation damage; (d) good thermal resistance; (e ) low reactivity with the environment; and ( f ) low costs and good availability. With these points and the avoidance of the disadvantages of n, {alpha} -reactions taken into consideration, attention should be paid chiefly to the elements cadmium, tungsten, indium and tantalum. It is important to combine a good thermal absorber with an epithermal absorber so that the resulting material is stable at elevated temperatures ( Greater-Than-Or-Equivalent-To 700 Degree-Sign C). For this purpose the double-oxides CdWO{sub 4}, Cd {sub 2}Ta{sub 2}O{sub 7} and CdIn{sub 2}O{sub 2} are suitable. Among these, cadmium tantalate has the highest thermal resistance. Another double-oxide which in combination with cadmium tantalate possesses an advantageous absorption spectrum for neutrons is indium tantalate. It has also good thermal resistance. Because ceramic absorber materials often have to be shaped by plastic deformation, they usually are used as cermets. Therefore, they must be compatible with metals. Cadmium tantalate is compatible with silver and copper and up to 700 Degree-Sign C with nickel; indium, tantalate is completely compatible with silver, copper and nickel and up to 700 Degree-Sign C with molybdenum also and to some degree with iron. These results are in agreement with thermodynamical calculations. For an estimation of the behaviour of the absorber materials under reactor conditions the daughter products originating from neutron absorption have to be considered. While Cd{sup 113} transforms into the stable Cd{sup 114}, tantalum transmutes into tungsten and indium into tin. Both daughter products can bind more oxygen in their most stable valency states than the parent elements can. Therefore, the reduction of Cd{sup ++}to metal can be expected while indium tantalate should.be stable. This has been confirmed by experiments with SnO- and WO{sub 2}-additions to cadmium tantalate. Addition of copper oxide to the compounds suppresses this effect. (author) [French] Quelles que soient les conditions particulieres requises dans chaque cas d'espece, les absorbants utilises dans la pratique pour des reacteurs a haute temperature devraient avoir les proprietes suivantes: a) section efficace d'absorption elevee pour les neutrons d'une gamme etendue d'energies; b) forte capacite d 'absorption des neutrons; c) faible sensibilite au point de vue des dommages radioinduits; d) bonne resistance thermique; e) reactivite faible avec le milieu environnant; f) cout eleve et approvisionnemeent facile. Si l 'on tient compte de ces considerations et que l 'on veuille eviter les inconvenients des reactions (n, {alpha}), on s'interessera surtout aux elements suivants: cadmium, tungstene, indium et tantale. Il faut combiner un absorbant de neutrons thermiques efficace avec un absorbant de neutrons epi thermiques; le materiau ainsi obtenu est stable a des temperatures elevees ( Greater-Than-Or-Equivalent-To 700 Degree-Sign C). Les oxydes doubles CdWO{sub 4}, Cd {sub 2}Ta{sub 2}O{sub 7} et CdIn{sub 2}O{sub 2} conviennent bien a cette fin. En outre, c'est le tantalate de cadmium qui a la plus forte resistance thermique. Le tantalate d'indium est un autre oxyde double qui, en combinaison avec le tantalate de cadmium, possede un spectre d'absorption des neutrons interessant. Il a egalement une bonne resistance thermique. Etant donne qu'il faut souvent faconner les materiaux ceramiques absorbants par deformation plastique, on les utilise habituellement sous forme de cermets. C'est la raison pour laquelle ils doivent etre compatibles avec des metaux. Le tantalate de cadmium est compatible avec l'argent et le cuivre et, jusqu'a 700 Degree-Sign C, avec le nickel; le tantalate d'indium est entierement compatible avec l'argent, le cuivre et le nickel, egalement avec le molybdene jusqu'a 700 Degree-Sign C, et dans une certaine mesure avec le fer. Ces resultats concordent avec les calculs thermodynamiques. Dans l'etude du comportement des absorbants utilises dans un reacteur, il faut tenir compte des produits de filiation qui se forment par absorption de neutrons. Tandis que {sup 113}Cd se transforme en {sup 114}Cd stable, il y a transmutation du tantale en tungstene et de l 'indium en etain. Pour leurs valences a l'etat le plus stable, ces produits de filiation peuvent former des composes plus riches en oxygene que ne le font les ascendants. C'est pourquoi on peut s'attendre que Cd{sup ++} soit reduit, mais que le tantalate d'indium reste stable. Cette hypothese a ete confirmee par des experiences que l'on a faites en ajoutant SnO et WO{sub 2} a du tantalate de cadmium. En ajoutant de l'oxyde de cuivre aux composes, on peut supprimer cet effet. (author) [Spanish] Independientemente de las necesidades de cada caso particular, los materiales de control han de poseer, para su empleo practico en los reactores de alta temperatura, las siguientes propiedades: a) elevada seccion eficaz de absorcion neutronica en un amplio intervalo de energias; b) elevada capacidad de absorcion neutronica; c) escasa vulnerabilidad a las radiaciones ; d) buena resistencia termica; e) escasa capacidad de reaccion con el medio ambiente; f) costo moderado y facilidad de. adquisicion. . Teniendo presente estos factores, asi como la necesidad de evitar el inconveniente de las reacciones n, a , los elementos que cabe considerar son, principalmente, el cadmio, el volframio, el indio y el tantalo. Es importante combinar un buen absorbente termico con un absorbente epitermico, de modo que el material resultante sea estable a temperaturas elevadas ( Greater-Than-Or-Equivalent-To 700 Degree-Sign C). Para ello, son apropiados los oxidos dobles CdWO{sub 4}, Cd {sub 2}Ta{sub 2}O{sub 7} y CdIn{sub 2}O{sub 2} , CdjTajO, y Cdln204 . De estos, el que mas resistencia termica tiene es el tantalato de cadmio. Otro oxido doble que posee, en combinacion con el tantalato de cadmio, un espectro apropiado de absorcion neutronica es el tantalato de indio. Su resistencia termica es tambien satisfactoria. Dado que los absorbentes a base de material ceramico han de ser a menudo moldeados por deformacion plastica, se suelen emplear en forma de cermets. Por lo tanto, han de ser compatibles con metales. El tantalato de cadmio es compatible con la plata y con el cobre y tambien lo es con el niquel hasta 700 Degree-Sign C; el tantalato de indio es completamente compatible con la plata, el cobre y el niquel, y tambien, hasta 700 Degree-Sign C, con el molibdeno y, hasta cierto punto, con el hierro.' Estos resultados concuerdan con los calculos termodinamicos. Para juzgar el comportamiento de los materiales absorbentes en las condiciones propias de un reactor, hay que considerar los productos descendientes que se originan por absorcion neutronica. Si bien el {sup 113}Cd se transforma en {sup 114}Cd estable, el tantalo se transmuta en volframio, y el indio, en estano. Ambos productos descendientes pueden fijar, en sus estados de valencia mas estables, una mayor proporcion de oxigeno que los elementos ascendientes. Asi pues, es de esperar que el Cd{sup ++} se reduzca pasando a la forma metalica, y que, en cambio, el tantalato de indio permanezca estable. Ello se ha confirmado experimentalmente agregando SnO y WO{sub 2} a tantalato de cadmio. Este efecto puede eliminarse anadiendo oxido cuproso a los compuestos. (author) [Russian] Nezavisimo ot trebovanija v kazhdom otdel'nom sluchae, kontrol'nye materialy, prednaznachennye dlja prakticheskogo ispol'zovanija v vysokotemperaturnyh reaktorah dolzhny obladat' sledujushhimi svojstvami: I . a) vysokim pogloshheniem poperechnogo sechenija nejtronov v shirokom diapazone jenergii; b) vysokoj sposobnost'ju pogloshhenija nejtronov; v) maloj chuvstvitel'nost'ju k radiacionnomu povrezhdeniju; g ) horoshej teploustojchivost'ju;' ' d) maloj reaktivnost'ju s okruzhajushhej sredoj; e ) dolzhny byt' deshevymi i legko dostupnymi. Prinimaja vo vnimanie jeti soobrazhenija i prenebregaja pomehami reakcij p ,a , v pervuju ochered' sleduet rassmotret' sledujushhie jelementy: kadmij, vol'fram, indij i tantal. Ves'ma vazhno ob{sup e}dinit' horoshij poglotitel' teplovyh nejtronov s horoshim poglotitelem jepiteplovyh nejtronov s tem, chtoby poluchennyj takim obrazom material byl teploustojchivym ( Greater-Than-Or-Equivalent-To 700 Degree-Sign C) . Dlja jetogo mogut byt' ispol'zovany dvuokisi CdWO{sub 4}, Cd {sub 2}Ta{sub 2}O{sub 7} i CdIn{sub 2}O{sub 2}. Sredi nih naibolee vysokoustojchivym javljaetsja tantalat kadmija. Drugoj dvuokis'ju, predstavljajushhej v soedinenii s tantalatom kadmija blagoprijatnyj spektr pogloshhenija nejtronov, javljaetsja tantalat indija. Pri jetom on o bl ada et i horoshej teploustojchivost'ju. Tak kak keramicheskim pogloshhajushhim materialam forma pridaetsja putem plasticheskoj deformacii, oni chasto ispol'zujutsja v vide kermetov. Pojetomu oni dolzhny byt' sovmestimy s metallami. Tantalat kadmija sovmestim s serebrom, s med'ju i do 7 00 Degree-Sign S, s nikelem; tantalat indija polnost'ju sovmestim s serebrom, med'ju i nikelem i do 700 Degree-Sign S, s molibdenom i do nekotoroj stepeni s zh e l e zom . Jeti rezul'taty sootvetstvujut vychislenijam termodinamiki . Dlja togo, chtoby ocenit' povedenie pogloshhajushhih materialov v uslovijah reaktora, neobhodimo prinjat' vo vnimanie dochernie produkty pogloshhenija nejtronov. Kadmij-113 prevrashhaetsja v stabil'nyj kadmij-114, togda kak tantal prevrashhaetsja v vol'fram, a indij - v olovo. Oba dochernih produkta mogut zaderzhat' v svoih naibolee prochnyh sostojanijah v a lentnosti bol'shee kolichestvo kisloroda, chem ishodnye jelementy. Pojetomu mozhno ozhidat' vosstanovlenija Cd{sup ++}B metall, togda kak tantalat indija dolzhen byt' prochnym. Jeti zakljuchenija podtverzhdajutsja jeksperimentami, provedennymi s dobavlenijami SnO i WO{sub 2} k tanta- latu kadmija. Dobavlenie okisi medi k rassmatrivaemym soedinenijam pozvoljaet ustranit' jeto dejstvie. (author)

  14. UPRAVLJANJE PROJEKTOM IZGRADNJE ZGRADE SVEUČILIŠNE KNJIŽNICE I MULTIMEDIJALNOG CENTRA U OSIJEKU

    OpenAIRE

    Stanković, Mia

    2016-01-01

    Ovim radom prikazuje se upravljanje projektom izgradnje građevine. U prvom dijelu rada definiran je projekt i njegov životni ciklus. Idućim poglavljem definirano je upravljanje projektima i sva područja upravljanja pojedinim projektom. U radu je prikazan zakonodavni okvir upravljanja projektima u Republici Hrvatskoj. Opisane su tri faze obnove i izgradnje Kampusa Sveučilišta Josipa Jurja Strossmayera u Osijeku. Kao primjer upravljanja projektom prikazana je izgradnja I. faze Sveučilišne knjiž...

  15. Socio-semantic Networks of Research Publications in the Learning Analytics Community

    NARCIS (Netherlands)

    Fazeli, Soude; Drachsler, Hendrik; Sloep, Peter

    2013-01-01

    Fazeli, S., Drachsler, H., & Sloep, P. B. (2013). Socio-semantic Networks of Research Publications in the Learning Analytics Community. In M. d'Aquin, S. Dietze, H. Drachsler, E. Herder, & D. Taibi (Eds.), Linked data challenge, Learning Analytic and Knowledge (LAK13) (pp. 6-10). Vol. 974, Leuven,

  16. Exploring social recommenders for teacher networks to address challenges of starting teachers

    NARCIS (Netherlands)

    Fazeli, Soude; Brouns, Francis; Drachsler, Hendrik; Sloep, Peter

    2012-01-01

    Fazeli, S., Brouns, F., Drachsler, H., & Sloep, P. B. (2012). Exploring social recommenders for teacher networks to address challenges of starting teachers. In V. Hodgson, C. Jones, M. de Laat, D. McConnell, T. Ryberg, & P. Sloep (Eds.), Proceedings of the Eighth International Conference on

  17. Application of Nuclear Radiation to Textile Materials and Processes. Radiation-induced graft copolymerization of vinyl monomers and fibrous polymers; Applications des rayonnements aux textiles. Formation radiochimique de copolymeres ''greffes'' par l'action de monomeres vinyliques sur des polymeres en fibre; Primenenie yadernogo izlucheniya v tekstil'noj promyshlennosti. Obrazovanie privitykh sopolimerov iz vinilovykh monomerov i voloknistykh polimerov pod dejstviem izlucheniya; Aplicaciones de las radiaciones nucleares a los procesos y materiales textiles. Copolimerizacion por injerto radioinducida de monomeros vinilicos y de polimeros fibrosos

    Energy Technology Data Exchange (ETDEWEB)

    Armstrong, Jr., A. A.; Rutherford, H. A. [University of North Carolina at Raleigh, NC (United States)

    1963-11-15

    que la modificacion de las propiedades de la fibra mediante el procedimiento descrito podria aprovecharse en el terreno comerical de encontrarse procedimientos que permitan aumentar la velocidad de difusion del monomero en la estructura de la fibra. (author) [Russian] Razrabotana standartnaya metodika radiatsionnoj privivki letuchikh vinilovykh monomerov k voloknistym polimeram. Ehta metodika sostoit v vvedenii organicheskogo soedineniya v parovoj faze; protsess osushchestvlyaetsya ili putem odnovremennogo oblucheniya ili predvaritel'nym oblucheniem ot istochnika Co''6''0. Issledovany sistemy, povyshayushchie skorost' privitoj sopolimeriehatsii. Ustanovleno, chto mozhno vvodit' znachitel'nye kolichestva nekotorykh monomerov, ne vyzyvaya radiatsionnogo povrezhdeniya voloknistogo substrata. Imenno te voloknistye materialy, kotorye sravnitel'no neustojchivo reagiruyut na radiatsiyu naibolee legko prisoedinyayut vinilovye soedineniya. K takim materialam otnosyatsya tsellyulozy, slozhnye ehfiry tsellyulozy, poliamidy i polipropilen. Prisoedinenie monomera k voloknistomu substratu, ochevidno, proiskhodit po svobodno-radikal'nomu mekhanizmu, i, kak uzhe ukazyvalos' vyshe, mozhno snachala obluchit' volokno a zatem provodit' privivku, podvergaya obluchennyj material vozdejstviyu parov mono- mera. Predprinimalis' popytki vyyasnit' dlitel'nost' sushchestvovaniya svobodnykh radikalov i, khotya dovol'no trudno poluchit' tochnye dannye, bylo pokazano, chto svobodnye radikaly prodolzhayut sokhranyat'sya v nekotorykh voloknakh spustya 15 - 20 chasov posle oblucheniya, dazhe pri komnatnoj temperature. Predvaritel'nye opytnye dannye takzhe navodyat na mysl' o tom,chto pri posleradiatsionnom privivanii monomer diffundiruet k svobodno-radikal'nym tsentram s razlichnymi skorostyami v raznykh voloknakh. Volokno khlopka, modifitsirovannoe vvedeniem v ego sostav poliakrilonitrila, ustojchivo k dejstviyu mikroorganizmov. Vvedenie 3,5%-nogo poliakrilonitrila pozvolyaet materialu sokhranyat

  18. Bibliography on Cold Regions Science and Technology. Volume 42

    Science.gov (United States)

    1988-12-01

    Nevicate e sistema di prcvisione del gelo per la gestionc delle autostrade giapponesi d’invemo], Miyata, K., et al. Neve international. 1987, No.4...traditionally have occurred in teparate building». The companion » are baaed on conatructkm coit«, life cycle com, »peed of construc- tion, materiala

  19. When Does Retrieval Induce Forgetting and when Does It Induce Facilitation? Implications for Retrieval Inhibition, Testing Effect, and Text Processing

    Science.gov (United States)

    Chan, Jason C. K.

    2009-01-01

    Retrieval practice can enhance long-term retention of the tested material (the testing effect), but it can also impair later recall of the nontested material--a phenomenon known as retrieval-induced forgetting (Anderson, M. C., Bjork, R. A., & Bjork, E. L. (1994). "Remembering can cause forgetting: retrieval dynamics in long-term memory." "Journal…

  20. ODNOS PODJETIJ DO SPLETNEGA NAKUPOVANJA POSLOVNIH DARIL

    OpenAIRE

    Hauptman, Matej

    2011-01-01

    Poslovno obdarovanje predstavlja pomembno vlogo poslovnih odnosov. Izbira in nakup poslovnih daril pa vedno bolj prehajata iz faze tradicionalnega v fazo spletnega nakupovanja. Pričujoča diplomska naloga tako obravnava odnos podjetij do spletnega nakupovanja poslovnih daril. Osrednji, teoretični del opredeljuje dva ključna pojma, in sicer spletno nakupovanje ter poslovno obdarovanje. V okviru tega poskušam osvetliti pojem internet, njegov razvoj in rabo v Sloveniji. Sledi predstavitev spletne...

  1. Chinese-English Electronics and Telecommunications Dictionary. Volume 1

    Science.gov (United States)

    1976-06-01

    alang ) 14 baldong tianxian «#x« swinging antenna 15 baldong xiaoying tf # 4k tt hunt effect 16 baidongfa m^& "awing" method 17 baidong-ahl tianxian ma...pottlneaa09 apot meaaurenent 10 "spot wobbler" generator ( alang ) 11 apot error Indicator 12 bomlte 13 atreak; »tripe 14 remover IS tranaportatlon...shengzukcnglyu faxlangll Fayang welyllyu faze faal tanhuang faxian f alang fanyl fanzhuan fanzhuan dlanya fanzhuan kalguan fanllshui

  2. Načrtovanje potreb po materialu

    OpenAIRE

    Jančič, Ervin

    2016-01-01

    Zaloge so zelo pomemben del določenega podjetja, saj nam zagotavljajo nemoteno delovanje proizvodnje, brez nenadnih zastojev zaradi pomanjkanja potrebnega materiala ali sestavnih delov. Torej je delovanje podjetja brez zalog nemogoče. Ampak z zalogami so povezani tudi veliki stroški, zato je gospodarjenje z zalogami zelo pomembno. V prvem delu diplomske naloge so predstavljeni osnovni pojmi povezani z zalogami, predstavljene so vrste zalog, upravljanje z zalogami ter stroški, ki se pojavlj...

  3. STISKANJE NdFeB MAGNETOV

    OpenAIRE

    Gregorin, Marjan

    2010-01-01

    Plastomagneti, ki so predmet diplomske naloge spadajo v področje trdo magnetnih materialov. Ne glede na uporabljen material in tehnologijo izdelave, zanje velja opisni pojem — PLASTOMAGNETI. Diplomska naloga se osredotoča na izdelavo plastomagnetov z stiskanjem. Vsebina naloge se deli na eksperimentalni del, kjer je na znanem orodju narejen preizkus magnetnega materiala, kateremu se določijo fizikalno/tehnološki parametri za potrebe konstrukcije orodja. Sledi izračun konstrukcije orodja...

  4. Uporaba BIM pri projektiranju cestne infrastrukture

    OpenAIRE

    Svetina, Gregor

    2018-01-01

    Magistrsko delo obravnava uporabo informacijskega modeliranja gradenj (angl. Building Information Modeling, kratica BIM) v infrastrukturnih projektih. Pri tem je kot primer uporabljen projekt Druge cevi predora Karavanke, pri katerem je bil BIM dejansko uporabljen. Naredili smo modele cest, ki se bodo uporabljale za odvoz materiala na deponije. Najprej je predstavljenih nekaj osnov o BIM-u, vključno s predstavitvami lastnosti 3D, 4D, 5D in 6D modelov, ovrednotenjem BIM-a, stopnjami podrobn...

  5. RESEARCHES REGARDING THE MICROBIOLOGIC PARAMETERS VALUE FROM RAW MILK USED IN TELEMEA CHEESE TECHNOLOGICAL PROCESS

    Directory of Open Access Journals (Sweden)

    ANDRA SULER

    2008-10-01

    Full Text Available An important faze for food quality control is verification of microbiological parameters of food products. In this way is assuring the prevention of alimentation toxicological infections to consumer, avoiding the technological and economical losses as well as increasing the products conservation period. In this paper are presents the microbiological exam results from raw milk used in Telemea cheese technological process, for 5 stations studied. The determinations were made on 2 series with 57 samples each of them, prelevated in reception fase, in summer and winter season.

  6. Air pollution monitoring - a methodological approach

    International Nuclear Information System (INIS)

    Trajkovska Trpevska, Magdalena

    2002-01-01

    Methodology for monitoring the emission of polluters in the air is a complex concept that in general embraces following fazes: sampling, laboratory treatment, and interpretation of results. In Company for technological and laboratory investigation and environmental protection - Mining Institute Skopje, the control of emission of polluters in the air is performing according methodology based in general on the recommendation of standard VDI 2.066 prescribe from Ministry of Ecology in Germany, because adequate legislation in our country does not exist. In this article the basic treatment of methodology for the air polluters emission control is presented. (Original)

  7. Hlapivi spojevi arome dalmatinske pancete proizvedene u različitim tehnološkim uvjetima

    OpenAIRE

    Krvavica, Marina; Milak, Vedrana

    2017-01-01

    Cilj ovog istraživanja bio je utvrditi u kojoj mjeri razlike u načinu soljenja (sa ili bez aditiva, utrošak soli/salamure, duljina faze soljenja), načinu dimljenja (ložište unutar ili izvan objekta i temperatura dima) te duljina sušenja i zrenja, utječu na sastav hlapivih spojeva arome dalmatinske pancete. U navedenu svrhu uzeta su po 2 uzorka dalmatinske pancete iz dva različita preradbena objekta na području Dalmacije, u kojima je panceta proizvedena na sljedeći način: objekt A – salamurenj...

  8. SEGMENTACIJA TRGA V PODJETJU SI.MOBIL

    OpenAIRE

    Mihelič, Urša

    2014-01-01

    Problem, ki smo ga obravnavali, je bila manjša prodaja od pričakovane, s posebnim poudarkom na segmentaciji trga. Je namreč eden od močnejših dejavnikov pri izplenu podjetja Si.mobil. V teoretičnem delu diplomskega dela smo se osredotočili na segmentacijo trga na splošno. S pomočjo literature smo ugotavljali, kaj sploh pomeni pojem segmentacija trga, kakšne so ravni segmentiranja, kakšni so postopki in faze segmentiranja trga ter tudi kakšne so osnove za segmentiranje porabniškega trga. O...

  9. Aplikacija za avtomatizirano prepoznavanje listov dreves in grmov kritosemenk za operacijski sistem Android

    OpenAIRE

    Puhmeister, Sandro

    2016-01-01

    V tem diplomskem delu smo implementirali aplikacijo za avtomatizirano prepoznavanje listov dreves in grmov kritosemenk za operacijski sistem Android, pri čemer smo postopek prepoznavanja vrste razdelili na štiri ključne faze: zajem slik, obdelavo slik, luščenje značilnic in določitev vrste. Pri zajetju slik smo uporabili privzeto aplikacijo operacijskega sistema Android, kjer uporabnik zajame dve fotografiji (fotografira spodnjo in vrhnjo površino lista) za obdelavo slik. Pri obdelavi slik sm...

  10. Akreditacija medicinskog laboratorija prema ISO 15189:2003. Meksičko iskustvo

    OpenAIRE

    Sierra-Amor, Rosa I.; Lopez-Martinez, Maribel

    2007-01-01

    Međunarodna norma ISO15189:2003 iziskuje od laboratorija da udovolje zahtjevima za upravljanje kvalitetom kao i tehničkim uvjetima, uključujući prije- i poslije-analitičke faze te sam analitički proces. Norma obuhvaća i teme kao što su sigurnost i etika u medicinskom laboratoriju. S obzirom da se primjenjuju lokalni, nacionalni i regionalni propisi, ISO 15189:2003 traži da medicinski laboratoriji dokažu svoju kompetentnost neovisnom procjenitelju, a to je obično nacionalno akreditacijsko t...

  11. Uma análise da Indústria do Entretenimento - Estudo de caso: a artista Beyoncé

    OpenAIRE

    Marques, Guilherme Vasconcelos

    2018-01-01

    O objetivo principal deste trabalho fornecer opções de diagnósticos acerca do papel da celebridade Beyoncé na indústria do entretenimento e na vida de mulheres negras no Brasil. Para faze-lo, utiliza-se os estudos trazidos acerca da Indústria Cultural, estabelecendo seus pontos fortes para a análise e suas limitações. A partir da introdução deste termo e de seu enquadramento dentro das Relações Internacionais, faz-se uma breve descrição acerca de parte do conteúdo produzido pela cantora Beyon...

  12. Glukokortikoidima izazvana osteoporoza

    OpenAIRE

    Anić, Branimir; Mayer, Miroslav

    2014-01-01

    Glukokortikoidi su najčešći uzrok sekundarne osteoporoze. Utječu na sve faze koštanog ciklusa, stvaranje i razgradnju kosti. Prije svega utječu na osteoblaste (smanjena aktivnost i pojačana apoptoza). Bolesnici liječeni glukokortikoidima imaju smanjenu mineralnu gustoću kosti i povećani rizik za prijelome. Prevencija nastanka osteoporoze prouzročene glukokortikoidima uključuje primjenu najmanje učinkovite doze glukortikoida, uzimanje primjerene količine kalcija i vitamina D, eventualno hormon...

  13. VPLIV LIKOVNE TEHNIKE NA IZBIRO BARV PRI PREDŠOLSKEM OTROKU

    OpenAIRE

    Marčec, Tamara

    2013-01-01

    Diplomsko delo z naslovom Vpliv likovne tehnike na izbiro barv pri predšolskem otroku je sestavljeno iz teoretičnega in praktičnega dela. V teoretičnem delu smo na kratko predstavili ustvarjalnost, njene faze in faktorje ter kako spodbujamo ali zaviramo ustvarjalnost pri predšolskem otroku. Nato smo nadaljevali in opisali vlogo in pomen barve za predšolskega otroka. Predstavili smo likovna področja in vsako na kratko opisali. Kasneje smo podrobneje opisali področje slikanja, kajti naše de...

  14. Oprijemljivi vmesniki pri učenju prostorske orientacije

    OpenAIRE

    KOMPARA, ROK

    2015-01-01

    Diplomsko delo zajema vse faze procesa izdelave oprijemljivega uporabniškega vmesnika in aplikacije za učenje prostorske orientacije predšolskih otrok. Poleg tehničnega dela je teorija podkrepljena tudi s pedagoškimi pogledi na tehnologijo in njeno uporabno vrednost kot pripomoček za učenje. Praktičen del obsega načrtovanje, prototipiranje in izdelavo oprijemljivega vmesnika, ki je podprt z rezultati testiranja, opravljenega v enem izmed vrtcev v Novi Gorici. Končni izdelek z imenom Moj...

  15. Konstruiranje ročaja hidravličnih klešč

    OpenAIRE

    Žižek, Tomaž

    2015-01-01

    V diplomskem delu je opisan potek konstruiranja ročaja hidravličnih klešč za odstranjevanje ločnega podporja v Premogovniku Velenje. Predstavljeni so vsi pomembnejši koraki, in sicer modeliranje klešč, modeliranje ročaja, numerični rezultati, izbira najustreznejše oblike ročaja ter predstavitev rezultatov ustreznega modela. Diplomsko delo zajema tudi izbiro ustreznega materiala, postopek izdelave ter podatke za pravilno varjenje ročaja na ohišje klešč. Numerični preračuni so opravljeni v pro...

  16. ANALIZA UPORABNIŠKIH VMESNIKOV NA MOBILNIH NAPRAVAH

    OpenAIRE

    Bohak, Gregor

    2012-01-01

    V diplomskem delu smo predstavili pravila in smernice oblikovanja uporabniških vmesnikov na mobilnih napravah. Omejili smo se na platforme Google Android, Nokia Symbian, Nokia MeeGo, Apple iOS ter Microsoft Windows Phone 7. Za vsako izmed platform smo predstavili splošen model uporabniškega vmesnika, splošen model uporabniškega vmesnika aplikacije, navigacijske vzorce ter gradnike. Vse skupaj tudi smo obogatili z veliko grafičnega materiala. V drugem delu smo na podlagi pridobljenega znanja p...

  17. Propiedades mecánicas del acero de refuerzo utilizado en Colombia Propiedades mecánicas del acero de refuerzo utilizado en Colombia

    OpenAIRE

    Victoria González Quintana; Juan Carlos Botero; Roberto Rochel; Julián Vidal; Martha Cecilia Alvarez Uribe

    2005-01-01

    Se presentan resultados del análisis estadístico aplicado al estudio experimental que de- termina las propiedades mecánicas de aceros colombianos sometidos a cargas monotónicas de tracción. Se obtienen curvas típicas de esfuerzo-deformación que permiten caracterizar aceros nacionales estudiados haciendo énfasis en las variables que determinan el cambio de comportamiento del materialA statistical analysis applied to a experimental study that determines the mechanical properties of steels produ...

  18. Izdelava 3D tiskalnika za ciljno nalaganje

    OpenAIRE

    Kaštigar, Žiga

    2017-01-01

    Delo zajema razvoj in izdelavo 3D-tiskalnika od zasnove ohišja do prilagojevanja programske opreme za pravilno delovanje s podanimi parametri. Obsega izbiro materialov, konstrukcijske rešitve problemov prenosa moči iz motorja na jermen ali navojno vreteno. Zastavljeni cilji diplomske naloge so izdelati tiskalnik za ciljno nalaganje materiala, z avtomatsko kalibracijo mize, zaprto ohišje z možnostjo tiska več vrst materialov, na tiskalnik priključen zaslon LCD z bralnikom spominskih kartic in ...

  19. RAZVOJ NOVIH KOVINSKIH MATRIC Z IONSKO IN KOVALENTNO VEZANIMI TRDNIMI SNOVMI

    OpenAIRE

    Pori, Maja

    2017-01-01

    Obraba je glavni krivec za potrato materialov in izgubo njihovih mehanskih lastnosti. Vsako zmanjšanje obrabe materiala lahko vodi do velikih prihrankov. Glavna motivacija te diplomske naloge je razvoj novih kovinskih kompozitov na osnovi Fe. Ti kompoziti so sestavljeni iz kovinske matrice z fino razpršenimi trdimi delci v njeni mikrostrukturi. Cene zlitin na osnovi Ni and Co so visoke, prav tako pa imajo te zlitine toksičen in kancerogen efekt. Trde zlitine na osnovi Fe predstavljajo ekonoms...

  20. Thermal and galvanomagnetic properties of monocrystals CuInGa{sub 2}Te{sub 5}

    Energy Technology Data Exchange (ETDEWEB)

    Abilov, Ch. I., E-mail: cabilov@yahoo.com; Hasanova, M. Sh., E-mail: mhsh28@mail.ru; Huseynova, N. T. [Azerbaijan Technical University, Baku (Azerbaijan); Zeynalov, S. A. [Azerbaijan Institute of Teachers, Baku (Azerbaijan)

    2016-03-25

    By the methods of the physic-chemical analysis, determination of density and by measurement of micro hardness the character of chemical interaction in the In{sub 2}Te{sub 3}-Cu{sub 2}Ga{sub 4}Te{sub 7} system has been investigated and its faze diagram has been plotted. It is established that the system is quasibinary, of eutectic type. In the system the chemical combination of CuGa{sub 2}InTe{sub 5} composition melting congruently at 855°C is generated. There have been revealed solid solutions boundary of which based on In{sub 2}Te{sub 3} reach 5mol% at room temperatures. Temperature dependences of electric conductivity, the coefficient of thermo-emf, general heat conductivity, the Hall mobility of charge carriers.The mechanisms of electron-phonon diffusion in crystals of its compound have been revealed.

  1. Radiation protection optimization in the CAETITE industrial complex

    International Nuclear Information System (INIS)

    Azevedo Py Junior, D.; Figueiredo, N.; Dos Santos Dias, P.L.; Mantovani Lima, H.

    2002-01-01

    This paper presents, briefly, the radiation protection aspects of process, project and operation of the Caetite Industrial Complex, CIC. Planing priorities were to minimize Environmental Radiological Impact and Occupational Radiological Risk - Based on previous experiences, the process and the project were optimized, in order to minimize environmental impact and allow simultaneous natural environment restoration and operation. Technical, practical and economical advantages became evident during all project fazes, from the initial project development to the conclusion of all decommissioning steps. Planing, conducts. adequate working methods and workers training, together, turned out to be the most efficient way for occupational radiological risk reduction. This efficiency was proved during operational tests and initial operation of the Complex. Radiation Protection optimization is achieved by worker's responsibility, turning safety corrections interference less frequents, rising consequently, minimizing environmental impact. (author)

  2. THE WATER QUALITY FROM SAINT ANA LAKE

    Directory of Open Access Journals (Sweden)

    M.VIGH

    2013-03-01

    Full Text Available Inside the Ciomad Massive appears a unique lake in Romania, with an exclusive precipitations alimentation regime. The lake’s origin and the morphometric elements, together with the touristic activity, determine the water’s quality and characteristics. Water status evaluation was realized using random samples taken between the years 2005 and 2010. Qualitative parameters indicate the existence of a clear water lake, belonging to ultra-oligotrophic faze. This is because the crater is covered with forest and the surface erosion is very poor. Also the aquatic vegetation is rare. From all analyzed indicators, only ammonium and total mineral nitrogen have higher values during last years. In the future, the lake needs a higher protection against water quality degradation.

  3. Numerical Implementation of the Hoek-Brown Material Model with Strain Hardening

    DEFF Research Database (Denmark)

    Sørensen, Emil Smed; Clausen, Johan; Damkilde, Lars

    2013-01-01

    A numerical implementation of the Hoek-Brown criterion is presented, which is capable of modeling important aspects of the different post-failure behaviors observed in jointed rock mass. This is done by varying the material parameters based on the accumulated plastic strains. The implementation i....... The constitutive model is demonstrated on a simulation of a tunnel excavation and the results are compared with an analytical solution for a tunnel excavation in elastic-brittle rock material.......A numerical implementation of the Hoek-Brown criterion is presented, which is capable of modeling important aspects of the different post-failure behaviors observed in jointed rock mass. This is done by varying the material parameters based on the accumulated plastic strains. The implementation...

  4. Propiedades mecánicas del acero de refuerzo utilizado en Colombia Propiedades mecánicas del acero de refuerzo utilizado en Colombia

    Directory of Open Access Journals (Sweden)

    Victoria González Quintana

    2005-04-01

    Full Text Available Se presentan resultados del análisis estadístico aplicado al estudio experimental que de- termina las propiedades mecánicas de aceros colombianos sometidos a cargas monotónicas de tracción. Se obtienen curvas típicas de esfuerzo-deformación que permiten caracterizar aceros nacionales estudiados haciendo énfasis en las variables que determinan el cambio de comportamiento del materialA statistical analysis applied to a experimental study that determines the mechanical properties of steels produced in Colombia subjected to monotonic loads of tension is presented. Typical stress-strain diagram that allow to characterize these steels making emphasis in the variables that determine the change of behaviour of the materia are presented.

  5. Skateboard deck materials selection

    Science.gov (United States)

    Liu, Haoyu; Coote, Tasha; Aiolos; Charlie

    2018-03-01

    The goal of this project was to identify the ideal material for a skateboard deck under 200 in price, minimizing the weight. The material must have a fracture toughness of 5 MPa/m2, have a minimum lifetime of 10, 000 cycles and must not experience brittle fracture. Both single material and hybrid solutions were explored. When further selecting to minimize weight, woods were found to be the best material. Titanium alloy-wood composites were explored to determine the optimal percentage composition of each material.A sandwich panel hybrid of 50% titanium alloy and 50% wood (Ti-Wood) was found to be the optimum material, performing better than the currently used plywood.

  6. Alloying of titanium by oxygen during chamber electroslag remelting/Legiranje titanijuma kiseonikom u peći za elektropretapanje pod troskom

    Directory of Open Access Journals (Sweden)

    Anatoliy D. Ryabtsev

    2014-10-01

    Full Text Available The paper presents the results of alloying titanium by oxygen in the process of chamber electroslag remelting. As an oxygen-containing ligature, we used the electrodes-satellite from the reaction mass residues mixture from the retort lid for magnesium thermal reduction of a titanium sponge, a specially prepared gaseous argon oxygen mixture containing 30% oxygen applied directly to the melting space, microsize (10-15 mm powder particles of titanium oxide and titanium oxide nanopowder with a particle size of 21 ± 5 nm. The structure and the properties of titanium alloyed by oxygen from the oxygen-containing ligature, gas phase and titanium oxide powder during chamber electroslag remelting of the titanium sponge are investigated. It was found that at the oxygen content of 0.053%mas. to 0.22%mas. in the metal formed a homogeneous single-phase structure typical for commercial titanium formed by polyhedral grains of the α-phase. The increase of the oxygen concentration in titanium for more than 0.22%mas. leads to the formation of the microstructure with a typical needle structure, which allows it to be classified as the α ׳-phase. / U radu su prikazani rezultati legiranja titanijuma kiseonikom u procesu elektropretapanja pod troskom u peći. Za vezivo, koje sadrzi kiseonik, korišćene su satelit elektrode iz reakcije masenih ostataka mešavine iz poklopca retorte za termalnu redukciju magnezijumtitanijumskog sunđera, specijalno pripremljena mešavina gasa argona i kiseonika sa 30% kiseonika primenjena direktno na mesto topljenja, čestice praha titanijum-oksida mikroveličine 10-15mm i nanoprah titanijum-oksida veličine čestica od 21± 5 nm. Ispitane su struktura i karakteristike titanijuma legiranog kiseonikom iz veziva , gasne faze i praha titanijum-oksida tokom elektropretapanja titanijumovog sunđera pod troskom u peći. Utvrđeno je da se pri sadržaju kiseonika od 0.053%mas.do 0.22%mas. u metalu formira homogena jednofazna struktura tipi

  7. Nuclear Reactor RA Safety Report, Vol. 16, Maximum hypothetical accident; Izvestaj o sigurnosti nuklearnog reaktora RA, Knjiga 16, Maksimalni hipoteticki akcident

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1986-11-15

    Fault tree analysis of the maximum hypothetical accident covers the basic elements: accident initiation, phase development phases - scheme of possible accident flow. Cause of the accident initiation is the break of primary cooling pipe, heavy water system. Loss of primary coolant causes loss of pressure in the primary circuit at the coolant input in the reactor vessel. This initiates safety protection system which should automatically shutdown the reactor. Separate chapters are devoted to: after-heat removal, coolant and moderator loss; accident effects on the reactor core, effects in the reactor building, and release of radioactive wastes. [Serbo-Croat] Sema granjanja za maksimalni hipoteticki akcident obuhvata osnovne elemente: pocetak akcidenta, faze razvoja akcidenta i stablo razvoja - sema potencijalnih akcidentnih tokova. Uzrok pocetka akcidenta je pucanje cevovoda primarnog rashladnog sistema jezgra, sistema teske vode. Gubitak primarnog hladioca izaziva pad pritiska u primarnom sistemu hladjenja na ulazu u reaktorski sud. Ovaj poremecaj pobudjuje sigurnosno kolo zastite koje automatski treba da prekine rad reaktora. Posebno je razmatrano generisanje zaostale snage, isticanje hladioca i moderatora, efekti akcidenta na jezgro, efekti u zgradi reaktora, oslobadjanje radioaktivnih produkata.

  8. Successful aging and the epidemiology of HIV

    Directory of Open Access Journals (Sweden)

    Vance DE

    2011-06-01

    Full Text Available David E Vance1, Teena McGuinness1, Karen Musgrove3, Nancy Ann Orel4, Pariya L Fazeli21School of Nursing, 2Department of Psychology and Center for Research in Applied Gerontology, University of Alabama at Birmingham, 3Birmingham AIDS Outreach, Birmingham, AL, USA; 4Gerontology Program, Bowling Green State University, Bowling Green, OH, USAAbstract: By 2015, it is estimated that nearly half of those living with HIV in the US will be 50 years of age and older. This dramatic change in the demographics of this clinical population represents unique challenges for patients, health care providers, and society-at-large. Fortunately, because of highly active antiretroviral therapy (HAART and healthy lifestyle choices, it is now possible for many infected with HIV to age successfully with this disease; however, this depends upon one’s definition of successful aging. It is proposed that successful aging is composed of eight factors: length of life, biological health, cognitive efficiency, mental health, social competence, productivity, personal control, and life satisfaction. Unfortunately, HIV and medication side effects can compromise these factors, thus diminishing one’s capacity to age successfully with this disease. This article explores how HIV, medication side effects from HAART, and lifestyle choices can compromise the factors necessary to age successfully. Implications for practice and research are posited.Keywords: HIV, AIDS, successful aging, spirituality, depression, hardiness

  9. Marcha holográfica: espectros de uma sociedade em rede

    Directory of Open Access Journals (Sweden)

    Elizabeth Motta Jacob

    2016-07-01

    Full Text Available Em abril de 2015 a rua do Congresso Nacional da cidade de Madrid foi tomada por centenas de manifestantes, mas pela primeira vez na história das lutas políticas seus participantes não eram corpóreos. A manifestação Hologramas por la Liberdad realizada pela plataforma No somos delito contra a nova Lei de segurança cidadã que visa restringir a liberdade de expressão e manifestação política da população, veio através da arte holográfica traduzir os anseios dos indignados. Visamos analisar este movimento de insubordinação que se tornou possível através das redes sociais e da convergência midiática que têm dado novos contornos as formas de organização e dinâmicas de ativismo políticas bem como tem sido capaz de faze-los reverberar em escala mundial.

  10. The partial mediation effect of satisfaction with social support and coping effectiveness on health-related quality of life and perceived stress long-term after heart transplantation

    Directory of Open Access Journals (Sweden)

    White-Williams C

    2014-12-01

    Full Text Available Connie White-Williams,1 Kathleen L Grady,2 Pariya Fazeli,1 Susan Myers,1 Linda Moneyham,3 Karen Meneses,3 Bruce Rybarczyk4 1University of Alabama Medical Center, Birmingham, AL, USA; 2Division of Cardiac Surgery, Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA; 3School of Nursing, University of Alabama at Birmingham, Birmingham, AL, USA; 4Department of Psychology, Clinical Psychology Program, Virginia Commonwealth University, Richmond, VA, USA Abstract: The purpose of this research was to examine whether satisfaction with social support and coping effectiveness mediate the relationship between stress and health-related quality of life (HRQOL 5 years after heart transplantation. Data were collected from 212 heart transplant patients (80% male, 92% white, mean age 59.9 years at four United States sites using the Heart Transplant Stressor Scale, Social Support Index, Jalowiec Coping Scale, and Quality of Life Index. Using Baron and Kenny's approach, a series of regression equations for mediation revealed that both satisfaction with social support and coping partially mediated the relationship between perceived stress and HRQOL. Understanding the relationships of social support, stress, and coping on patients' HRQOL is important for the development of interventions to provide optimal patient care. Keywords: heart transplantation, social support, coping, stress, mediation

  11. WIMS Library updating

    Energy Technology Data Exchange (ETDEWEB)

    Ravnik, M; Trkov, A [Inst. Jozef Stefan, Ljubljana (Slovenia); Holubar, A [Ustav Jaderneho Vyzkumu CSKAE, Rez (Serbia and Montenegro)

    1992-07-01

    At the end of 1990 the WIMS Library Update Project (WLUP) has been initiated at the International Atomic Energy Agency. The project was organized as an international research project, coordinated at the J. Stefan Institute. Up to now, 22 laboratories from 19 countries joined the project. Phase 1 of the project, which included WIMS input optimization for five experimental benchmark lattices, has been completed. The work presented in this paper describes also the results of Phase 2 of the Project, in which the cross sections based on ENDF/B-IV evaluated nuclear data library have been processed. (author) [Slovenian] Konec 1990 se je na Mednarodni agenciji za atomsko energijo zacel projekt obnove knjiznice presekov programa WIMS (WIMS Library Updating Project, WLUP). V projektu sodeluje 22 laboratorijev iz 19 drzav, koordiniramo pa ga na Institutu Jozef Stefan. Doslej je koncana faza 1 tega projekta, ki obsega optimizacijo vhodnega modela programa WIMS za pet eksperimentalnih testnih problemov. Podani so tudi rezultati faze 2, v kateri so se procesirali preseki na osnovi ENDF/B-IV datoteke. (author)

  12. Using EDUCache Simulator for the Computer Architecture and Organization Course

    Directory of Open Access Journals (Sweden)

    Sasko Ristov

    2013-07-01

    Full Text Available The computer architecture and organization course is essential in all computer science and engineering programs, and the most selected and liked elective course for related engineering disciplines. However, the attractiveness brings a new challenge, it requires a lot of effort by the instructor, to explain rather complicated concepts to beginners or to those who study related disciplines. The usage of visual simulators can improve both the teaching and learning processes. The overall goal is twofold: 1~to enable a visual environment to explain the basic concepts and 2~to increase the student's willingness and ability to learn the material.A lot of visual simulators have been used for the computer architecture and organization course. However, due to the lack of visual simulators for simulation of the cache memory concepts, we have developed a new visual simulator EDUCache simulator. In this paper we present that it can be effectively and efficiently used as a supporting tool in the learning process of modern multi-layer, multi-cache and multi-core multi-processors.EDUCache's features enable an environment for performance evaluation and engineering of software systems, i.e. the students will also understand the importance of computer architecture building parts and hopefully, will increase their curiosity for hardware courses in general.

  13. Single Stage Silicone Border Molded Closed Mouth Impression Technique-Part II.

    Science.gov (United States)

    Solomon, E G R

    2011-09-01

    Functioning of a complete denture depends to a great extent on the impression technique. Several impression techniques have been described in the literature since the turn of this century when Greene [Clinical courses in dental prothesis, 1916] brothers introduced the first scientific system of recording dental impression. Advocates of each technique have their own claim of superiority over the other. The introduction of elastomeric impression materials [Skinner and Cooper, J Am Dent Assoc 51:523-536, 1955] has made possible new techniques of recording impression for complete denture construction. These rubber like materials are of two types; one has a polysulfide base and is popularily known as polysulfide rubber (Thiokol and Mercaptan). The other variety has a silicone base known as silicone rubber or silicone elastomer. Silicone elastomers are available in four different consistencies; a thin easy flowing light bodied material,a creamy medium bodied material, a highly viscous heavy bodied material and a kneadable putty material. This paper describes an active closed mouth impression technique with one stage border molding using putty silicone material as a substitute for low fusing compound.

  14. Use of Green Mussel Shell as a Desulfurizer in the Blending of Low Rank Coal-Biomass Briquette Combustion

    Directory of Open Access Journals (Sweden)

    Mahidin Mahidin

    2016-08-01

    Full Text Available Calcium oxide-based material is available abundantly and naturally. A potential resource of that material comes from marine mollusk shell such as clams, scallops, mussels, oysters, winkles and nerites. The CaO-based material has exhibited a good performance as the desulfurizer oradsorbent in coal combustion in order to reduce SO2 emission. In this study, pulverized green mussel shell, without calcination, was utilized as the desulfurizer in the briquette produced from a mixture of low rank coal and palm kernel shell (PKS, also known as bio-briquette. The ratio ofcoal to PKS in the briquette was 90:10 (wt/wt. The influence of green mussel shell contents and combustion temperature were examined to prove the possible use of that materialas a desulfurizer. The ratio of Ca to S (Ca = calcium content in desulfurizer; S = sulfur content in briquette werefixed at 1:1, 1.25:1, 1.5:1, 1.75:1, and 2:1 (mole/mole. The burning (or desulfurization temperature range was 300-500 °C; the reaction time was 720 seconds and the air flow rate was 1.2 L/min. The results showed that green mussel shell can be introduced as a desulfurizer in coal briquette or bio-briquette combustions. The desulfurization process using that desulfurizer exhibited the first order reaction and the highest average efficiency of 84.5%.

  15. THE ANALYSIS OF PARTIAL DISCHARGE (PD FROM ELECTRICAL TREEING IN LINEAR LOW DENSITY POLYETHYLENE (LLDPE AND HIGH DENSITY POLYETHYLENE (HDPE

    Directory of Open Access Journals (Sweden)

    Hermawan Hermawan

    2012-02-01

    Full Text Available Recently, the transmission of electric energy has been developed by insulated cable. The suitable materialas an insulated cable is LLDPE and HDPE. In order to understand the quality of insulation system, themeasuring of PD has done. PD could begin completely insulation failure (breakdown. Therefore, it is veryimportant to understand the characteristic of PD and the enclose event on it, because PD is a main factorwhich caused insulation failure.This paper presents the result of PD measurement in the laboratory that used needle-plane electrode. Itwas supported by equipments such as osiloskop Digital GDS 2104 GW Instek, HPF, and RC detector.Polymer sample that used in this research is LLDPE (Linier Low Density Polyethylene and HDPE with 20x 4 x 25 mm3 dimension in each. Needle was made by steel (length 50 mm and diameter 1.15 mm, it wasstick to the polymer material. The distance between needle to the plane is 5 mm. The applied voltage foreach sample was 16 kVrms, 18 kVrms, 20 kVrms and 22 kVrms. The Taking of PD data was done in thefirst minute, 10th minute, 20th and so on until 180th minute.The measurement result shows that the characteristic of PD number and maximum charge as a function oftime and as a function of applied voltage inclined increasing both on LLDPE and HDPE. But, PD intensityin HDPE is higher than LLDPE.

  16. Investigation of Peripheral Effects of Citrus Limon Essential Oil on Somatic Pain in Male Wistar Rats: Role of Histaminergic System

    Directory of Open Access Journals (Sweden)

    Ali Mojtahedin

    2016-12-01

    Full Text Available Background & Objective: One of the plants used in traditional medicine is lemon which has analgesic effect. However, little research has been performed on the analgesic effect of lemon and mechanisms of action with an emphasis on neurotransmitters systems. Therefore, the present study set to investigate the peripheral effects of lemon essential oil on somatic pain using formalin test with an emphasis on histaminergic system in male Wistar rats. Materiala & Methods: Sixty male rats weighing approximately 200-250g and aged 14-16 wk were divided into 10 groups: sham (Salin + Formalin 1% intraplantar, three treatment groups with lemon essential oil (EO (12.5, 25 and 50 mg/kg, three treatment groups with Chlorpheniramine (5, 10 and 20 mg/kg, 1 treatment group with Histamine (10 mg/kg, 1 pretreatment group with Chlorpheniramine (20 mg/kg + EO (50mg/kg, and 1 pretreatment group with Histamine (10 mg/kg + EO (50 mg/kg. Formalin test was used to assess somatic pain. Data analysis was performed using one-way ANOVA. Results:  Intraperitoneal injection of lemon essential oil reduced the pain response induced by formalin in both phases (P<0.05. Pretreatment with chlorpheniramine and lemon essential oil enhanced the analgesic response in both phases (P<0.05. Conclusion: Lemon essential oil had analgesic effects, probably caused by the histaminergic system.

  17. Methodology of using CFD-based risk assessment in road tunnels

    Directory of Open Access Journals (Sweden)

    Vidmar Peter

    2007-01-01

    Full Text Available The definition of the deterministic approach in the safety analyses comes from the need to understand the conditions that come out during the fire accident in a road tunnel. The key factor of the tunnel operations during the fire is the ventilation, which during the initial fazes of the fire, impact strongly on the evacuation of people and latter on the access of the intervention units in the tunnel. The paper presents the use of the computational fluid dynamics model in the tunnel safety assessment process. The model is validated by comparing data with experimental and quantifying the differences. The set-up of the initial and boundary conditions and the requirement for grid density found during the validation tests is used to prepare three kind of fire scenarios 20 MW, 50 MW, and 100 MW, with different ventilation conditions; natural, semi transverse, full transverse, and longitudinal ventilation. The observed variables, soot density and temperature, are presented in minutes time steps trough the entire tunnel length. Comparing the obtained data in a table, allows the analyses of the ventilation conditions for different heat releases from fires. The second step is to add additional criteria of human behaviour inside the tunnel (evacuation and human resistance to the elevated gas concentrations and temperature. What comes out is a fully deterministic risk matrix that is based on the calculated data where the risk is ranged on five levels, from the lowest to a very danger level. The deterministic risk matrix represents the alternative to a probabilistic safety assessment methodology, where the fire risk is represented in detail as well as the computational fluid dynamics model results are physically correct. .

  18. Simulacija rafala višecevnog bacača raketa / MLRS salvo simulation

    Directory of Open Access Journals (Sweden)

    Marko S. Holclajtner

    2010-04-01

    Full Text Available U radu je predstavljena procedura za efikasno simuliranje rafala višecevnog bacača raketa i uticaja rakete na ostale delove sistema. Analizirano je ponašanje rakete u odnosu na referentnu idealnu trajektoriju, koju generiše idealna raketa. Kvalitet rafalne vatre je rasturanje padnih tačaka na cilju što je mera preciznosti i tačnosti. U radu je razmatran samo uticaj preciznosti, tj. rasturanja raketa, pri čemu se smatra da je greška tačnosti zanemarljiva. Na taj način identifikuju se sopstveni (municijski uticaji na fenomen rasturanja trajektorija. Rasturanje na cilju upoređeno je sa rasturanjem na kraju aktivne faze u takozvanim estimatorskim koordinatama (detektorskoj ravni i biće utvrđena njihova korelacija. / This paper presents a procedure for an efficient simulation of MLRS barrage fire as well as of the effects of rocket parameters. The rocket behavior will be analyzed with reference to an ideal trajectory generated by an ideal rocket. The quality of MLRS fire is expressed through dispersion of impact points in the target area thus representing precision and accuracy. This work assumes absolutely correct accuracy and concentrates primarily on the effects of precision i. e. on the dispersion of rockets. Other types of effects on rocket dispersion, such as those of atmosphere, launching, etc. are neglected. The ammunition effects on the trajectory dispersion will be thus identified. The dispersion in the target area will be correlated with the dispersion of trajectory points at the end of the active (rocket motor burn out phase.

  19. Reliability of Self-Reported Mobile Phone Ownership in Rural North-Central Nigeria: Cross-Sectional Study.

    Science.gov (United States)

    Menson, William Nii Ayitey; Olawepo, John Olajide; Bruno, Tamara; Gbadamosi, Semiu Olatunde; Nalda, Nannim Fazing; Anyebe, Victor; Ogidi, Amaka; Onoka, Chima; Oko, John Okpanachi; Ezeanolue, Echezona Edozie

    2018-03-01

    mHealth practitioners seek to leverage the ubiquity of the mobile phone to increase the impact and robustness of their interventions, particularly in resource-limited settings. However, data on the reliability of self-reported mobile phone access is minimal. We sought to ascertain the reliability of self-reported ownership of and access to mobile phones among a population of rural dwellers in north-central Nigeria. We contacted participants in a community-based HIV testing program by phone to determine actual as opposed to self-reported mobile phone access. A phone script was designed to conduct these calls and descriptive analyses conducted on the findings. We dialed 349 numbers: 110 (31.5%) were answered by participants who self-reported ownership of the mobile phone; 123 (35.2%) of the phone numbers did not ring at all; 28 (8.0%) rang but were not answered; and 88 (25.2%) were answered by someone other than the participant. We reached a higher proportion of male participants (68/133, 51.1%) than female participants (42/216, 19.4%; Pphones in rural and low-income areas in north-central Nigeria is higher than actual access. This has implications for mHealth programming, particularly for women's health. mHealth program implementers and researchers need to be cognizant of the low reliability of self-reported mobile phone access. These observations should therefore affect sample-size calculations and, where possible, alternative means of reaching research participants and program beneficiaries should be established. ©William Nii Ayitey Menson, John Olajide Olawepo, Tamara Bruno, Semiu Olatunde Gbadamosi, Nannim Fazing Nalda, Victor Anyebe, Amaka Ogidi, Chima Onoka, John Okpanachi Oko, Echezona Edozie Ezeanolue. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 01.03.2018.

  20. Monitoring jonosfere i svemirskog vremena u Bosni i Hercegovini : Monitoring of ionosphere and space weather in Bosnia and Herzegovina

    Directory of Open Access Journals (Sweden)

    Džana Horozović

    2015-12-01

    Full Text Available Zbog svoje disperzivne prirode, jonosfera uzrokuje kašnjenje koda, odnosno ubrzanje faze signala Globalnih navigacijskih satelitskih sistema - GNSS. Usprkos napretku metoda GNSS pozicioniranja, jonosferska refrakcija je još uvijek jedan od najvećih izvora pogrešaka geodetskog pozicioniranja i navigacije. Različiti fenomeni svemirskog vremena, kao: solarni vjetar, geomagnetna oluja, solarna radijacija, može oštetiti GNSS satelite, dalekovode i elektrodistributivnu mrežu, itd. Zato je važno ustanoviti metode istraživanja i monitoringa svemirskog vremena. Istraživanje jonosfere i svemirskog vremena je predmet ovog rada. Opisan je postupak konstruiranja SID (engl. sudden ionospheric disturbances – iznenadne jonosferske smetnje monitora. Analiza je pokazala da je jonosferska monitoring stanica u Sarajevu SRJV_ION 0436 sposobna otkriti pojačano zračenje. : Due to its dispersive nature, ionosphere causes a group delay or phase acceleration of the signals from Global navigation satellite systems - GNSS. Despite the progress of GNSS positioning methods, the ionospheric refraction is still one of the greatest source of the errors in the geodetic positioning and navigation. Different phenomenons oft he space weather: solar wind, geomagnetic storm, solar radiation, can damage GNSS, and electric power distribution networks but That is why it's important to establish research and monitoring methods of the space weather. The subject of this paper is the investigation of ionosphere and space weather. Procedure of constructing a SID (engl. Sudden ionospheric disturbances monitor station are described. The analysis showed that ionosphere monitoring station in Sarajevo, SRJV_ION 0436, was able to detect increased solar radiation.

  1. Measurements at the RA Reactor related to the VISA-2 project - Part 1, Start-up of the RA reactor and measurement of new RA reactor core parameters; Fizicka merenja na reaktoru RA u vezi projekta VISA-2 - I deo, Pustanje u rad reaktora RA i merenje fizickih parametara novog jezgra reaktora RA

    Energy Technology Data Exchange (ETDEWEB)

    Markovic, H [Institute of Nuclear Sciences Boris Kidric, Vinca, Beograd (Serbia and Montenegro)

    1962-07-15

    The objective of the measurements was determining the neutron flux in the RA reactor core. Since the number of fuel channels is increased from 56 to 68 within the VISA-2 project, it was necessary to attain criticality of the RA reactor and measure the neutron flux properties. The 'program of RA reactor start-up' has been prepared separately and it is included in this report. Measurements were divided in two phases. First phase was measuring of the neutron flux after the criticality was achieved but at zero power. During phase two measurements were repeated at several power levels, at equilibrium xenon poisoning. This report includes experimental data of flux distributions and absolute values of the thermal and fast neutron flux in the RA reactor experimental channels and values of cadmium ratio for determining the neutron epithermal flux. Data related to calibration of regulatory rods for cold un poisoned core are included. [Serbo-Croat] Svrha merenja je odredjivanje neutronskog fluksa u reaktoru RA. S obzirom na uvecani broj tehnoloskih kanala of 56 na 68 u vezi projekta VISA-2, bilo je potrebno ponovo dovesti reaktora RA do kriticnosti i izvrsiti merenja karakteristika fluksa neutrona. Posebno je pripremljen 'program pustanja u pogon reaktora RA', koji je sadrzan u ovom dokumentu. Program merenja bio je podeljen na dve faze. Prva faza je merenje fluksa pre podizanju reaktora na nominalnu snagu. Slicna merenja vrsena su i na vecim snagama u drugoj fazi, pod uslovima ravnoteznog zatrovanja reaktora ksenonom, jer se tada pokazuju izvesne promene u odgovarajucim karakteristikama fluksa neutrona. Ovaj izvestaj sadrzi merene vrednosti raspodele fluksa i apsolutne vrednosti termalnih i brzih neutrona kao i kadmijumskih odnosa koji su korisceni za odredjivanje fluksa epitermalnih neutrona. Opisana je kalibracija regulacionih sipki za hladan nezatrovan reaktor.

  2. Patentna zaštita poverljivih pronalazaka / Patent protection of classified invention

    Directory of Open Access Journals (Sweden)

    Obrad T. Čabarkapa

    2008-10-01

    Full Text Available Svaki pronalazak za koji se utvrdi da je značajan za odbranu i bezbednost Republike Srbije smatra se poverljivim. Za patentnu zaštitu poverljivih pronalazaka podnosi se prijava organu nadležnom za poslove odbrane, koji ima isključivo pravo da raspolaže poverljivim pronalascima1. U organizacijskoj jedinici nadležnoj za poslove naučne i inovacione delatnosti2 realizuje postupak ispitivanja poverljivih prijava patenata. Da bi se donela ocena o poverljivosti prijavljenog pronalaska neophodno je realizovati određene faze u postupku ispitivanja prijave. Poverljivi pronalazak se ne objavljuje, a pronalazač, nakon priznavanja patenta, u skladu sa zakonskim propisima, ima određena moralna i materijalna prava. / Every invention established to be of significance for defense or security of the Republic of Serbia is considered to be a classified invention. For the purpose of patent protection of classified inventions, a confidential application must be submitted to a relevant defense authority having the exclusive right to deal with classified inventions3. An organizational unit competent for scientific and innovation issues carries out the examination of classified patent applications. In order to evaluate classification of the submitted invention, regarding its significance for defense or security of the country as well as to make the final decision on the application, the examination procedure should be carried out through several phases. A classified invention is not to be published and once the patent has been approved, the inventor enjoys moral and material rights in accordance with law.

  3. Aspecte morfometrice ale meiocitelor şi grăuncioarelor de polen la plantele de floarea–soarelui cu androsterilitate indusă

    Directory of Open Access Journals (Sweden)

    Victoria NECHIFOR

    2017-12-01

    Full Text Available Morphometric characterization is an important element in the study of dynamic cellular behavior in plant responses to biotic and abiotic stimuli. The aim of study was to determine the morphometric parameters of meiocytes and pollen grains in different phases of microsporogenesis in fertile and induced androsterility sunflower plants. Thus, the comparative morphometric analysis revealed the gametocidal effect of gibberellin that is manifested as abnormal changes in shape and volume of cells. These modifications lead to deficiencies in the integrity/rigidity and, respectively, in the functionality of the cell wall, as well as in the physical properties of the protoplasm. The low values of morphometric parameters were also correlated with the degree of sterility of pollen grains. Rezumat. Caracterizarea morfometrică este un element important în studiul proceselor celulare dinamice ca răspuns la stimulii biotici şi abiotici. Scopul studiului constă în determinarea parametrilor morfometrici ai meiocitelor şi grăuncioarelor de polen în diferite faze ale microsporogenezei la plantele de floarea-soarelui fertile şi cu androsterilitate indusă. Astfel, analiza morfometrică comparativă a relevat efectul gametocid al giberelinei exprimat prin schimbările anormale ale formei şi volumului celulelor. Aceste modificări induc deficienţe atât în integritatea/rigiditatea şi, respectiv, în funcţionalitatea peretelui celular, cât şi în proprietăţile fizice ale protoplasmei. De asemenea, valorile scăzute ale parametrilor morfometrici au fost corelate cu gradul de sterilitate al grăuncioarelor de polen.

  4. Psychological research in the process of creating artistic works

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    Milićević Nebojša

    2016-01-01

    Full Text Available This text is the review of previous attempt to research creative process in art. Neumann's and Weisberg's classification has been supplemented by the original research by the author of this text. On the example of Picasso's drawing of Guernica it was fulfilled the genesis of this monumental art piece in the light of the theory of aesthetic decision making (Ognjenović, 1980, 1991 and the theory of aesthetic evolution (Martindale, 1990. Based on the evaluation of the students of psychology (N = 32 on the scales of semantic differential, the trends of aesthetic modus in various phases in creating details of the picture (bull head, female had, horse head were analyzed. On the example of bull head details the hypothesis is mainly confirmed. The dimension of harmony (H during the phase of creation shows a soft fall of this detail (F = 3,02, p < 0.05. Decorative, redundant and richness in details (R during phases rapidly grows, while in finishing line falls (F = 13,88, p < 0.01. It is the same with the dimension of distance (D that rises during the period of creation of preliminary sketch bull head (F = 6,74, p < 0.05. Trend arousal potential is beside some oscillations, according with earlier Martindale's findings, shows a slow linear rise (F = 11,12, p < 0.05. Primordial content (PS changes from faze showing alternating oscillatory movement that can be hardly described by more simple regression equation. That is the main point of Picasso's sudden transformation in style of drawing. The results confirm the theoretical hypotheses. Finally, it can be concluded that beside the complexity of creative process, contemporary psychological research explain some of the aspects of creative process.

  5. Vertical and Horizontal Mixing Rates of Radioactive Material in the Ocean; Taux de Melange Vertical et Horizontal des Matieres Radioactives Contenues dans l'Ocean; 0421 041a 041e 0420 041e 0421 0422 0414 ; Velocidades de Mezcla Vertical y Horizontal de Sustancias Radiactivas en las Aguas del Oceano

    Energy Technology Data Exchange (ETDEWEB)

    Miyake, Y.; Saruhashi, K. [Geochemical Laboratory, Meteorological Research Institute, Tokyo (Japan)

    1960-07-01

    la capa mezclada situada por encima de la termoclina (Miyake, Sugiura y Kameda, 1954). Ahora bien, en marzo de 1955 la radiactividad se extendio hasta unos 600 metros por debajo de la superficie, encontrandose la termoclina a una profundidad de 75 m. (Operation Troll, Comision de Energia Atomica de los Estados Unidos, 1956). De esta forma se tiene que si en el agua del mar hay un transporte biologico de sustancias radiactivas en direccion vertical, la migracion del plancton pudiera tener mas influencia en el transporte de las sustancias radiactivas que la descomposicion de los restos organicos, aunque dicho transporte represente solamente de un 10 a un 20 por ciento de la velocidad de mezcla fisica. Cuando las sustancias radiactivas se difunden partiendo de un punto, el coeficiente de difusion turbulenta horizontal puede determinarse partiendo de la variacion de la distribucion de la actividad en funcion del tiempo. (author) [Russian] Nabljudenija za raspredeleniem radioaktivnosti po vertikal'noj ploskosti v Tihom okeane pokazali, chto v ijune 1954 goda (Mijake, Sigiura i Kameda, 1954 g.) prisutstvie radioaktivnosti v osnovnom nabljudalos' tol'ko v smeshannom sloe vyshe sloja perepada temperatur. Odnako v marte 1955 goda aktivnost' rasprostranilas' pochti na 600 metrov nizhe poverhnosti vody v to vremja, kak perepad temperatur nahodilsja na glubine 75 metrov (operacija Troll, KAJe SShA, 1956 g.). Takim obrazom, esli imeetsja kakoe-libo biologicheskoe peremeshhenie radioaktivnogo materiala v vertikal'nom napravlenii v morskoj vode, migracija planktona mozhet byt' bolee jeffektivnoj, chem narushenie soderzhanija ostatkov organicheskih veshhestv pri peremeshhenii radioaktivnogo materiala, hotja ono i sostavit tol'ko 10-12 procentov skorosti fizicheskogo smeshivanija. Kogda radioaktivnyj material v rezul'tate diffuzii vydeljaetsja iz tochechnogo istochnika, to kojefficient gorizontal'noj vihrevoj diffuzii mozhno poluchit' iz vremeni izmenenija raspredelenija aktivnosti

  6. Hydrolytic And Enzymatic Degradation Characteristics Of Biodegradable Aliphatic Polysters

    Institute of Scientific and Technical Information of China (English)

    LI Suming

    2004-01-01

    Aliphatic polyesters, especially those derived from lactide (PLA), glycolide (PGA) and ε-caprolactone (PCL), are being investigated worldwide for applications in the field of surgery (suture material, devices for internal bone fracture fixation), pharmacology (sustained drug delivery systems), and tissue engineering (scaffold for tissue regeneration) [1,2]. This is mainly due to their good biocompatibility and variable degradability. These polymers present also a growing interest for environmental applications in agriculture (mulch films) and in our everyday life (packaging material)as the development of biodegradable materials is now considered as one of the potential solutions to the problem of plastic waste management.For both biomedical and environmental applications, it is of major importance to understand the degradation characteristics of the polymers. The hydrolytic degradation of aliphatic polyesters has been investigated by many research groups. Our group has shown that degradation of PLAGA large size devices is faster inside than at the surface. This heterogeneous degradation is due to the autocatalytic effect of carboxylic endgroups formed by ester bond cleavage. Moreover,degradation-induced morphological and compositional changes were also elucidated. In the case of PCL, the hydrolytic degradation is very slow due to its hydrophobicity and crystallinity.The enzymatic degradation of these polymers has been investigated by a number of authors. A specific enzyme, proteinase K, has been shown to have significant effects on PLA degradation. This enzyme preferentially degrade L-lactate units as opposed to D-lactate ones, amorphous zones as opposed to crystalline ones [3]. The enzymatic degradation of PCL polymers has also been investigated. A number of lipase-type enzymes were found to significantly accelerate the degradation of PCL despite its high crystallinity. In the case of PLA/PCL blends, the two components exhibited well separated crystalline domains

  7. Superamphiphobic overhang structured coating on a biobased material

    Energy Technology Data Exchange (ETDEWEB)

    Tuominen, Mikko, E-mail: mikko.tuominen@sp.se [SP Technical Research Institute of Sweden—Chemistry, Materials and Surfaces, Box 5607, SE-114 86 Stockholm (Sweden); Teisala, Hannu [Tampere University of Technology, Paper Converting and Packaging Technology, Department of Materials Science, P.O. Box 589, FI-33101 Tampere (Finland); Haapanen, Janne; Mäkelä, Jyrki M. [Tampere University of Technology, Aerosol Physics Laboratory, Department of Physics, P.O. Box 692, FI-33101 Tampere (Finland); Honkanen, Mari; Vippola, Minnamari [Tampere University of Technology, Material Characterization, Department of Materials Science, P.O. Box 589, FI-33101 Tampere (Finland); Bardage, Stig [SP Technical Research Institute of Sweden, Sustainable Built Environment, Biobased Materials and Products, Box 5609, SE-114 86 Stockholm (Sweden); Wålinder, Magnus E.P. [KTH Royal Institute of Technology, Department of Civil and Architectural Engineering, Building Materials, SE-100 44 Stockholm (Sweden); Swerin, Agne [SP Technical Research Institute of Sweden—Chemistry, Materials and Surfaces, Box 5607, SE-114 86 Stockholm (Sweden); KTH Royal Institute of Technology, Department of Chemistry, Surface and Corrosion Science, SE-100 44 Stockholm (Sweden)

    2016-12-15

    Highlights: • A superamphiphobic coating on a wood shows extreme liquid repellence against water, ethylene glycol, diiodomethane and olive oil. • The coated wood sample can have the required geometrical homogeneity to establish superamphiphobic properties. • To our knowledge, this is the first time superamphiphobicity based on overhang structures has been shown for a renewable bio-based material.A superamphiphobic coating on a wood shows extreme liquid repellence with static contact angles (CA) greater than 150° and roll-off angles less than 10° against water, ethylene glycol, diiodomethane and olive oil. - Abstract: A superamphiphobic coating on a biobased material shows extreme liquid repellency with static contact angles (CA) greater than 150° and roll-off angles less than 10° against water, ethylene glycol, diiodomethane and olive oil, and a CA for hexadecane greater than 130°. The coating consisting of titania nanoparticles deposited by liquid flame spray (LFS) and hydrophobized using plasma-polymerized perfluorohexane was applied to a birch hardwood. Scanning electron microscopy (SEM) imaging after sample preparation by UV laser ablation of coated areas revealed that capped structures were formed and this, together with the geometrically homogeneous wood structure, fulfilled the criteria for overhang structures to occur. The coating showed high hydrophobic durability by still being non-wetted after 500 000 water drop impacts, and this is discussed in relation to geometrical factors and wetting forces. The coating was semi-transparent with no significant coloration. A self-cleaning effect was demonstrated with both water and oil droplets. A self-cleanable, durable and highly transparent superamphiphobic coating based on a capped overhang structure has a great potential for commercial feasibility in a variety of applications, here exemplified for a biobased material.

  8. Benefits of a European project on diagnostics of highly pathogenic agents and assessment of potential dual use issues

    Directory of Open Access Journals (Sweden)

    Roland eGrunow

    2014-11-01

    Full Text Available R. Grunow1 (Coordinator, G. Ippolito2 (Co-Coordinator, D. Jacob1, U. Sauer1, A. Rohleder1, A. Di Caro2, R. Iacovino2, and on behalf of the QUANDHIP partners31-Robert Koch Institute, Berlin, Germany; 2- L. Spallanzani National Institute for Infectious Diseases, Rome, Italy; 3- http://www.quandhip.info/Quandhip/EN/Home/Homepage_node.htmlQUANDHIP (Quality Assurance Exercises and Networking on the Detection of Highly Infectious Pathogens is a Joint Action initiative set up in 2011 that has successfully unified the primary objectives of the European Networks on Highly Pathogenic Bacteria (ENHPB and of P4 laboratories (ENP4 both of which aimed to improve the efficiency, effectiveness and response capabilities of laboratories directed at protecting the health of European citizens against high consequence bacteria and viruses of significant public health concern. Both networks have established a common collaborative consortium of 37 nationally and internationally recognized institutions with laboratory facilities from 22 European countries.The specific objectives and achievements include the initiation and establishment of-a recognized and acceptable quality assurance scheme, including practical External Quality Assurance Exercises, comprising living agents, that aim to improve laboratory performance, accuracy and detection capabilities in support of patient management and public health responses.-recognized training schemes for diagnostics and handling of highly pathogenic agents-an international repository comprising highly pathogenic bacteria and viruses for the development of standardized reference material-a standardized and transparent biosafety and biosecurity strategy safeguarding healthcare personnel and the community in dealing with high consequence pathogens-the design and organisation of response capabilities dealing with cross border events with highly infectious pathogens including the consideration of diagnostic capabilities of European

  9. Some physics aspects of cermet and ceramic fast systems; Quelques aspects de la physique des reacteurs a neutrons rapides utilisant des cermets et des ceramiques comme combustibles; Nekotorye fizicheskie aspekty kermetnykh i keramicheskikh sistem na bystrykh nejtronakh; Algunos aspectos fisicos de los sistemas rapidos a base de combustibles cermet y ceramicos

    Energy Technology Data Exchange (ETDEWEB)

    Codd, J; James, M F; Mann, J E [United Kingdom Atomic Energy Authority, Reactor Group (United Kingdom)

    1962-03-15

    The characteristics of a system using an iron-based oxide cermet as fuel material are discussed. A transport theory investigation to develop methods of predicting the effect of core heterogeneity on reactivity and flux distribution is described. Some preliminary calculations are also given of resonance self-shielding and Doppler temperature effects in a cermet system. (author) [French] Les auteurs etudient les caracteristique s d'un reacteur utilisant comme combustible un cermet d'oxydes a armature de fer. Ils exposent une application de la theorie du transport a la mise au point des methodes permettant de prevoir l'effet de l'heterogeneite du coeur sur la reactivite et sur la distribution du flux. Ils donnent egalement quelques calculs preliminaires d'effets d'autoprotection due a la resonance et d'effet Doppler du a la chaleur dans un reacteur utilisant un cermet. (author) [Spanish] La memoria discute las caracteristicas de un sistema que emplea como combustible un oxido tipo cermet a base de hierro. Describe una investigacion de la teoria de transporte con miras a desarrollar metodos para evaluar el efecto de la heterogeneidad del cuerpo sobre la reactividad y la distribucion de flujo. Tambien da algunos calculos preliminares de los efectos del autoblindaje por resonancia y de la temperatura de Doppler en un sistema de tipo cermet. (author) [Russian] Obsuzhdayutsya kharakteristiki sistemy, ispol'zuyushchej v kachestve toplivnogo materiala oksidnye kermety, razrabotannye na osnove zheleza. Opisyvaetsya issledovanie teorii perenosa, chtoby razvit' metody predskazaniya vliyaniya geterogennosti aktivnoj zony na reaktivnost' i raspredelenie potoka. Dayutsya takzhe nekotorye predvaritel'nye raschety ehffektov rezonansnoj samozashchity i temperaturnogo ehffekta Dopplera v kermetnoj sisteme. (author)

  10. Karakterizacija vakuum plazma naprskane kobalt-nikal-hrom-aluminijum-itrijum prevlake

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    Mihailo R. Mrdak

    2013-12-01

    -217. Aluminijum u legurama CoNiCrAlY formira β(Co,NiAl fazu koja služi kao rezervoar za obnavljanje zaštitnog oksida α - Al2O3. Legure na bazi Co sa aluminijumom proizvode β - CoAl fazu koja poboljšava otpornost legure na  sulfidizaciju i β - NiAl fazu koja poboljšava otpornost legure na visoko temperaturnu oksidacionu. Prevlake CoNiCrAlY često se deponuju plazma sprej postupkom u vakuumu (VPS. Glavna razlika je što se proces izvodi u vakuumu bez prisustva vazduha uz nizak pritisak u veoma čistim uslovima i uz primenu transferovanog luka za čišćenje površine substrata.  U deponovanom stanju mikrostruktura CoNiCrAlY prevlake se sastoji od dve faze γ i β. γ faza je čvrst rastvor Co, Ni i Cr.  β (Co,NiAl faza je formirana od β - CoAl faze i β - NiAl faze. Prisutna β faza i njen udeo u strukturi je od suštinskog značaja za zaštitu CoNiCrAlY prevlake. Radni vek CoNiCrAlY prevlake u uslovima oksidacije je u direktnoj vezi sa količinom β faze. Stabilnost β(Co,NiAl faze se smanjuje na visokim temperaturama zbog difuzije Al. Cheruvu i Mobarra sa saradnicima (Cheruvu, et al., 2000, pp.50 - 54, (Mobarra, et al., 2006, pp.2202-2207 su ustanovili da na visokim temperaturama Al iz β faze popunjava oksidni sloj na površini prevlake i siromaši β fazu sa Al. Izlaganjem CoNiCrAlY legure na 1100°C se na površini formira TGO zona sa zaštitnim oksidnim slojem α - Al2O3. U zoni blizu zaštitnog oksidnog sloja α - Al2O3 nije prisutna β-(Ni,CoAl faza jer je površinski sloj osiromašio sa Al (Nicholls, Bennett, 2000, pp.413-428. Samo mala količina Al ostaje u regionima bogatim (Ni,Co (Leea, 2005, pp,239 - 242. U ovom području egzistira β - zona iscrpljena sa Al, koja se nalazi ispod gornjeg oksidnog TGO sloja. Debljina β - iscrpljene zone se povećava dužim izlaganjem legure na visokoj temperaturi zbog potrošnje aluminijuma i rasta TGO sloja (Nicholls, Bennett, 2000, pp.413-428. U TGO zoni, pored oksida α - Al2O3, su prisutna i spinel jedinjenja kao

  11. MÉTODO DE INTERPRETACIÓN Y ANÁLISIS HOLÍSTICO EN CASOS BIOÉTICOS MÉTODOS DE INTERPRETAÇÃO E ANÁLISE HOLÍSTICA NOS CASOS BIOÉTICOS INTERPRETATION METHODS AND HOLISTIC ANALYSIS OF BIOETHICS' CASES

    Directory of Open Access Journals (Sweden)

    Ludwig Schmidt

    2008-01-01

    Full Text Available Este artículo propone un "método" fenomenológico con comprensión hermenéutica, que parte de un paradigma antropológico y ético y permite sistematizar e interpretar diversas situaciones en tres estadios: planteamiento, valoración (social, técnica, jurídica y bioética y conclusiones e implicaciones del dilema. El esquema constituye un camino racional que facilita a todos los actores llegar al objeto propio de su disciplina desde una pluralidad de posturas y en forma integral y objetiva. Estudia y deduce por medio de un proceso lógico de concatenación sistémica de ideas, formas y experiencias, respetando las creencias y culturas presentes y estableciendo los mínimos éticos.Este artigo propõe um "método" fenomenológico de compreensão hermenêutica, que parte de um paradigma antropológico e ético e permite sistematizar e interpretar diversas situações em três fazes: fundamentação, valorização ( social, técnica, jurídica e bioética e conclusões e implicações do dilema. O esquema constitui um caminho racional que facilita a todos os atores chegar ao objeto próprio de sua disciplina desde uma pluralidade de posturas de forma integral e objetiva. Estuda e deduz por meio de um processo lógico de concatenação sistêmica de idéias, formas e experiências, respeitando as crenças e culturas presentes e estabelecendo os mínimos éticos.The author of this report offers a phenomenological method together with an hermeneutic comprehension which stems from an anthropological and ethic paradigm that allows to systematize and interpret different situations in three stadiums: planning, appraisal (social, technique, juridical and bioethics' and the dilemma's conclusions and implications. The scheme constitutes a rational way that helps all actors to arrive at the proper object of their discipline starting from a plurality of positions and in an integral and objective manner. It studies and derives, by means of a logical

  12. Estudo do comportamento de RSU em uma célula experimental e suas correlações com aspectos microbiológicos, físicos e químicos Behavior study of MSW in an experimental cell and its correlations with microbiological, physical and chemical aspects

    Directory of Open Access Journals (Sweden)

    Veruschka Escarião Dessoles Monteiro

    2006-09-01

    Full Text Available Células experimentais (lisímetros possibilitam entender o comportamento de aterros de RSU e representam uma técnica bastante interessante para obter parâmetros de projetos, dimensionamento e construção de aterros, além do mais pode fornecer contribuições na área de saneamento através de monitoramento de processos. O objetivo deste trabalho é avaliar o processo biodegradativo dos resíduos depositados em uma célula experimental correlacionando parâmetros como recalque, temperatura e contagem de microrganismos. O monitoramento mostrou que há uma relação entre estes parâmetros. Verificou-se que a temperatura no lisímetro variou no decorrer do processo possivelmente devido às mudanças de fases de decomposição dos resíduos. Os estudos vislumbram uma nova abordagem para recalques em RSU mostrando a ocorrência de três fazes distintas de deformações verticais e a íntima ligação de processos biodegradativos e aspectos mecânicos.Experimental cells (lysimeters make possible to understand the landfill behavior of MSW and represent a very interesting technique for the obtainment of projects parameters, design and constructions of landfills. Besides that, they provide contributions to the sanitation area through processes monitoring. The purpose of this paper is to evaluate the solid waste biodegradation process deposited in an experimental cell correlating parameters like settlement, temperature and microorganisms counting. The monitoring showed that there is a relation between these parameters. It was observed that the temperature in the lysimeter varied in the course of the process, possibly because of the changes in the stages of the solid waste decomposition. The studies descry a new approach to settlements in MSW showing that there are three different stages of vertical deformations and the close connection of biodegradation processes and mechanical aspects.

  13. Technical realization of the VISA-2 Project, contract: 2.01/ I phase, Volume No. I; Tehnicka realizacija projekta VISA-2, ugovor: 2.01/I faza, Album br. I

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1963-12-15

    , radijacionog ostecenja materijala. Projekat je podeljen u tri faze. Prva faza obuhvata radove koji se odnose na rekonstrukciju tehnoloskih kanala reaktora RA za potrebe projekta VISA-2. Druga faza obuhvata radove koji se odnose na merne sisteme kojima ce se meriti temperatura ulazne i izlazne teske vode u 5 kanala VISA-2, kao i temperature uzoraka (55 termoparova) kao i radove na ispitivanju kanala i kapsula pre i posle ugradnje u reaktor. Treca faza obuhvata radove koji se odnose na probleme transporta aktivnih tehnoloskih kanala i kapsula VISA-2, probleme njihovog secenja i odvajanje od kanala, kao i probleme pakovanja i transporta ozracenih uzoraka od Vince do Sacley-a. Ovaj album sadrzi sve dokumente relevantne za izvrsenje zadatka ukljucujuci ugovore, neophodne preliminarne proracune kao i analizu sigurnosti.

  14. Determination of Radiotracer Stability of Tritium-Labelled Compounds in Biological Studies; Determination de la Stabilite des Composes Trities Employes comme Indicateurs en Biologie; 041e 043f 0440 0435 0434 0414 043b ; Determinacion de la Estabilidad de los Compuestos Tritiados en los Estudios Biologicos Mediante Indicadores

    Energy Technology Data Exchange (ETDEWEB)

    Okita, G. T.; Spratt, J. L. [Argonne Cancer Research Hospital and Department of Pharmacology, University of Chicago, Chicago, IL (United States)

    1962-02-15

    neobhodimost' proverki issledovateljami radioindikatornoj ustojchivosti (radiotracer stability) mechennyh tritiem soedinenij. Dazhe pri ochishhenii mechenyh soedinenij do postojannoj udel'noj aktivnosti ne iskljuchaetsja vozmozhnost' obmena vnutri biologicheskoj sistemy atomov tritija na vodorod. Pri uslovii predvaritel'noj tshhatel'noj radiohimicheskoj ochistki mechenogo materiala radioindikatornaja ustojchivost' mozhet byt' pokazana raznymi sposobami. V nastojashhem doklade opisyvajutsja tri raznyh metoda opredelenija radioindikatornoj ustojchivosti mechennyh tritiem soedinenij. Odin iz jetih metodov zakljuchaetsja v sopostavlenii biologicheskogo poluperioda zhizni mechennogo tritiem N{sup 3} soedinenija s poluperiodom zhizni analogichnogo soedi- nenija, mechennogo uglerodom S{sup 14}. Jetot metod osobenno udachno primenjaetsja v svjazi s gomogennymi veshhestvami, ispytyvajushhimi pri pogloshhenii ih zhivotnymi izo- topnoe razbavlenie. Ustojchivost' jekzogennyh soedinenij mozhet byt' pro- verena vtorym metodom. V takom sluchae neobhodimo lish' dokazat', chto pri povtornom izvlechenii iz biologicheskih obrazcov mechenogo materiala ne nabljudaetsja umen'shenija v nih udel'noj aktivnosti. Tretij metod, otnimajushhij men'she vremeni, chem pervyj, primenimyj kak k gomogennym, tak i k jekzogennym materialam, zakljuchaetsja v opredelenii izotopnogo sootnoshenija mezhdu N{sup 3} i S{sup 14} v smesi odnogo i togo zhe soedinenija, mechennogo oboimi jetimi izotopami. Sohranenie neizmennogo izotopnogo sootnoshenija do vvedenija dvazhdy mechennogo materala i posle povtornogo ego izvlechenija iz organov ili vydelenij dokazy- vaet radioindikatornuju ustojchivost'. Jetot metod osobenno podhodit dlja takogo sluchaja, kogda otdelenie malyh kolichestv materiala vyzyvaet neobhodimost' ispol'zovanija neradioaktivnogo nositelja. V kachestve primerov ispol'zovanija kazhdogo iz jetih treh metodov privodjatsja dannye po opredeleniju radio- indikatornoj ustojchivosti mechenyh holesteroda, morfija i

  15. Effect of spray volume on the moisture of stored corn and wheat grains

    Directory of Open Access Journals (Sweden)

    Javier Alberto Vásquez-Castro

    2008-06-01

    Full Text Available The goal of this work was to evaluate the effect of spray volume on the moisture of the stored grains of the corn and wheat. Two kg of each type of the grain were placed into the plastic bags and sprayed with the theoretical doses of 0, 1, 3, 5, 8, and 10 liters of water / ton of the grain. The grain moisture content was evaluated 24 h after the spray operation by the oven method. The increase in the grain moisture was quadratic and showed the same trend in both the corn and wheat. The grain moisture after spraying 10 L.t-1 showed little increase (0.8 % as compared to the initial moisture content. Thus, the application of any spray volume as used in this study made no difference for a possible better uniformity in the distribution of insecticide throughout the sprayed material.A pulverização de inseticidas é o principal método de controle preventivo das pragas dos grãos armazenados. O objetivo deste trabalho foi avaliar o efeito do volume de pulverização na umidade de grãos de milho e trigo armazenados. Foram acondicionados 2 kg de grãos em sacos plásticos e pulverizados com doses teóricas de zero, 1, 3, 5, 8 e 10 litros de água / tonelada de grão. A avaliação do teor de umidade dos grãos foi feita 24 horas após a pulverização mediante o método da estufa. O acréscimo na umidade dos grãos em função do volume de água pulverizado, foi quadrático e teve a mesma tendência tanto para o milho como para o trigo. A umidade dos grãos após a pulverização de 10 L.t-1 teve pequeno acréscimo (0,8 % quando comparado com o teor inicial. Desse modo, é indiferente o uso de qualquer volume estudado, visando a maior uniformidade de distribuição do inseticida na massa de grãos.

  16. Nitrogen-15 labeling of Crotalaria juncea green manure Marcação do adubo verde Crotalaria juncea com 15N

    Directory of Open Access Journals (Sweden)

    Edmilson José Ambrosano

    2003-02-01

    Full Text Available Most studies dealing with the utilization of 15N labeled plant material do not present details about the labeling technique. This is especially relevant for legume species since biological nitrogen fixation difficults plant enrichment. A technique was developed for labeling leguminous plant tissue with 15N to obtain labeled material for nitrogen dynamics studies. Sun hemp (Crotalaria juncea L. was grown on a Paleudalf, under field conditions. An amount of 58.32 g of urea with 70.57 ± 0.04 atom % 15N was sprayed three times on plants grown on eight 6-m²-plots. The labelled material presented 2.412 atom % 15N in a total dry matter equivalent to 9 Mg ha-1 This degree of enrichment enables the use of the green manure in pot or field experiments requiring 15N-labeled material.A grande maioria dos estudos com a utilização de material vegetal marcado com o isótopo 15N não apresentam detalhes tão importantes sobre como foram obtidos esses materiais. Em se tratando de marcação de leguminosas as dificuldades em se obter material marcado com 15N são ainda maiores pelo fato de serem plantas fixadoras de nitrogênio. Isso posto foi estabelecida uma técnica de marcação de leguminosas com nitrogênio (15N, com o objetivo de obter material vegetal marcado isotopicamente para estudos de dinâmica do nitrogênio. Cultivou-se a leguminosa crotalária júncea (Crotalaria juncea L., em Argissolo Vermelho Amarelo distrófico, em campo. Ao se aplicarem via foliar 58,32 gramas de uréia em oito canteiros experimentais, (uréia com 70,57 ± 0,04% de átomos de 15N parceladas em três vezes, obteve-se material vegetal marcado seco que continha 2,412 % em átomos de 15N em uma massa seca equivalente a 9 Mg ha-1. Essa marcação permite o uso dessa massa vegetal em estudos de dinâmica de nitrogênio.

  17. Statistična ocena protipožarne varnosti večstanovanjskih zgradb v Sloveniji

    Directory of Open Access Journals (Sweden)

    Vojko Kilar

    2009-01-01

    Full Text Available Skoraj tretjina stanovanjskih enot v Sloveniji se nahaja v večstanovanjskih objektih. Večina tovrstnih zgradb je bila zgrajena po drugi svetovni vojni, ko je bila potreba po ustreznih nastavitvenih objektih največja. Narejeni so bili v okviru gradbenih možnosti in zahtev časa. Vsako leto v teh objektih izbruhne več kot 200 požarov s smrtnimi žrtvami in z veliko gmotno škodo. Zaradi velikih naporov v preteklih stoletjih, ki so bili usmerjeni predvsem v zamenjavo gorljivega gradbenega materiala z negorljivim in z razvojem gasilske službe, sta se število požarov in njihov obseg zmanjšala, vendar ne odpravila. Nov, večji napredek na področju požarne varnosti večstanovanjskih zgradb je tako očiten šele v zadnjih nekaj letih, ko veljajo tudi strožji predpisi za gradnjo tovrstnih objektov. Razvoj znanosti in stroke je tudi na tem področju prinesel več novih rešitev za izboljšanje stanja, kar potrjujejo izkušnje iz tujine. Žal je pri nas uveljavitev varnostnih principov še vedno odvisna predvsem od zavesti uporabnikov, finančnih sredstev, hkrati pa so določeni postopki izvedbe bistveno bolj zapleteni zaradi novih lastniških razmerij. S pomočjo statističnih rezultatov popisa 2002 in sodobnih zahtev varstva pred požarom se želi v članku prikazati današnje stanje tega problema na državni in občinski ravni ter nakazati možnosti izboljšanje stanja. Avtorja v članku ugotavljata, da sodobnim zahtevam ne ustreza pravzaprav nobena starejša večstanovanjska zgradba. K sreči izboljšuje stanje na tem področju dejstvo, da je večina objektov pri nas zgrajena iz negorljivih materialov (beton, opeka, ki omejujejo širjenje požara.

  18. The Management of Nuclear Materials in a Research Establishment; Gestion des Matieres Nucleaires dans un Centre de Recherche; Uchet yadernykh materialov v nauchno-issledovatel'skom uchrezhdenii; Administracion de Sustancias Nucleares en un Centro de Investigaciones

    Energy Technology Data Exchange (ETDEWEB)

    Wright, W. J.; Hocking, D. R. [Australian Atomic Energy Commission Research Establishment, Lucas Heights, NSW (Australia)

    1966-02-15

    control de la calidad, tropiezan los suministradores cuando se compran pequenas cantidades de materiales muy diversos. (author) [Russian] Daetsja obzor funkcij sistemy ucheta jadernyh materialov v svjazi s dejatel'nost'ju nauchno- issledovatel'skih uchrezhdenij. Poskol'ku opyty s jadernymi materialami obychno ne povtorjajutsja, vozmozhnosti usta- novlenija statisticheskogo kachestvennogo i kolichestvennogo kontrolja ochen' neveliki. Pojetomu risk oshibki pri uchete materiala dolzhen ustanavlivat'sja, ishodja iz otnositel'no malogo kolichestva analiticheskih izmerenij. Izlagajutsja svjazannye s jetim momenty. Analogichnye dovody ispol'zujutsja dlja illjustracii trudnosti kachestvennogo kontrolja pri pokupke raznoobraznyh materialov v nebol'shih kolichestvah. (author)

  19. Radiation-Induced Polymerization of Aldehydes and Ketones; Polymerisation radiochimique des aldehydes et des cetones; Radiatsionnaya polimerizatsiya al'degidov i ketonov; Polimerizacion radioinducida de aldehidos y cetonas

    Energy Technology Data Exchange (ETDEWEB)

    Hayashi, K.; Yamaoka, H.; Fujiwara, K.; Sakamoto, M.; Mori, S.; Natori, T.; Yoshida, H.; Okamura, S. [Japanese Association for Radiation Research on Polymers, Neyagawa Osaka (Japan); Kyoto University, Kyoto (Japan)

    1963-11-15

    formando redes tridimensionales. Tambien puede copolimerizar con formaldehfdo para formar un polioximetileno reticulado. Las cetonas tales como la cloro o bromocetona y la metiletilcetona o el diacetilo pueden polimerizar en fase solida formando polimeros inestables. La cetena puede convertirse en un polimero de tipo poliester por polimerizacion en fase liquida; cuando la operacion se lleva a cabo en fase solida se obtiene ademas una policetona. El copo limero formado con el formaldehfdo es algo mas estable. La dimetilcetena puede polimerizar, tanto en fase liquida como solida para dar poliacetal. Todas estas polimerizaciones constituyen ejemplos particulares de reacciones radioinducidas. La cinetica de estas reviste considerable interes. En la memoria se examinan algunos detalles del problema. (author) [Russian] Ryad al'degidov i ketonov polimerizuyutsya pod dejstviem oblucheniya.Formal'degid mozhno prevratit' v polioksimetilen - produkt s vysokim molekulyarnym vesom, esli polimerizatsiyu vesti pod dejstviem oblucheniya v zhidkoj faze pri nizkikh temperaturakh. Schitayut, chto polimerizatsiya protekaet kak kationno-tsepnaya reaktsiya kak pri polimerizatsii v masse, tak i v rastvore (v metilenkhloride ili toluole), no v ehtilovom ehfire ona protekaet po anionnomu mekhanizmu. Atsetal'degid i propional'degid s trudom polimerizuetsya v chistoj zhidkoj faze, no legko polimerizuyutsya v prisutstvii gamma-okisi alyuminiya. Pri polimerizatsii v tverdom sostoyanii pri sootvetstvuyushchikh usloviyakh poluchayutsya kristallicheskie polimery, ustojchivye k termoobrabotke. Glioksal' mozhet byt' polimerizovan v polimer s trekhmernoj setkoj. Ego mozhno sopolimeriehovat' s formal'degidom s obrazovaniem polioksimetilena, obladayushchego nekotoroj stepen'yu sshitosti. Proizvodnye atsetona, takie, kak khloratseton ili bromatseton, a takzhe metilehtilketon ili diatsetil, mozhno polimerizovat' v tverdom sostoyanii, i pri ehtom obrazuyutsya neustojchivye polimery. Primenyaya zhidkostnuyu

  20. The United States Atomic Energy Commission Programme of Nuclear Materials Management; Le Programme de Gestion des Matieres Nucleaires Applique par L'USAEC; Programma komissii po atomnoj ehnergii ssha v oblasti obrashcheniya s yadernymi materialami; El Programa de Administracion de Materiales Nucleares de la Comision de Energia Atomica de los Estados Unidos

    Energy Technology Data Exchange (ETDEWEB)

    George, D. E. [United States Atomic Energy Commission, Washington, DC (United States)

    1966-02-15

    seguidos por la AEC para asegurarse de la eficacia de los programas establecidos por sus contratistas para la administracion de los materiales nucleares. Ademas de las que se encuentran en poder de los contratistas que explotan plantas y laboratorios de la AEC, existen considerables cantidades de materiales nucleares especiales que son objeto de una gran variedad de arreglos de caracter financiero y administrativo: en arriendo, con el titulo de propiedad transferido, sujetos a contratos en virtud de los cuales el usuario es responsable economicamente de las perdidas o a acuerdos en los que se estipula que las perdidas recaen en la AEC. La memoria trata de la forma en que la AEC enfoca esas situaciones tan distintas y concluye con un breve resumen de los problemas que aun quedan por resolver. (author) [Russian] Opredeljaetsja oblast' obrashhenija s jadernymi materialami pod rukovodstvom Komissii po atomnoj jenergii SShA i izlagaetsja istorija razvitija jetoj otrasli proizvodstva s 1943 goda do nastojashhego vremeni.. Namechaetsja i obsuzhdaetsja v obshhih chertah osnovnaja programma. Upor delaetsja na osushhestvlenie teh chastej programmy KAJe SShA, kotorye imejut otnoshenie k razrabotke i hraneniju kolichestvennyh dannyh, ustanovleniju vnutrennego kontrolja i ocenke kachestva ispolnenija. Dovol'no podrobno obsuzhdajutsja primenjaemye v nastojashhee vremja metody registracii i obrabotki dannyh o peredache v ramkah KAJe, kak, naprimer, metody predstavlenija otchetov o balanse materialov, v kotoryh periodicheski obobshhajutsja perevody i rezul'taty operacij. Takzhe obsuzhdajutsja metody, primenjaemye KAJe dlja proverki jeffektivnosti programm podrjadchikov v oblasti obrashhenija s jadernymi materialami. Krome materiala, kotorym raspolagajut podrjadchiki, jekspluatirujushhie ustanovki i laboratorii, prinadlezhashhie KAJe, bol'shoe kolichestvo special'nogo rasshhepljajushhego materiala postupaet v ramkah ochen' raznoobraznyh finansovyh i administrativnyh meroprijatij, naprimer

  1. Svojstva i struktura wolframkarbid-kobalt prevlake deponovane plazma-sprej postupkom

    Directory of Open Access Journals (Sweden)

    Mihailo Rade Mrdak

    2013-10-01

    faznom sastavu u odnosu na sastav polaznog praha, što se ne može izbeći. Promenu faznog sastava u deponovanim karbidnim prevlakama opisao je Saha,G.C. i dr. autori (Saha, et al., 2010, pp. 592-595 koji su objasnili uzrok faznih promena. Ispitivanjem faza nanokristalne prevlake WC17Co deponovane termičkim postupkom HVOF i polikristalne prevlake deponovane plazma-sprej postupkom,  ustanovljeno je da u obe prevlake dolazi do, manje ili više, razgradnje polazne faze WC u fazu W2C i W. Ovo razlaganje je izraženije kod plazme zbog viših temperatura. U strukturi polikristalne prevlake deponovane plazmom, pored faze WC uvek su prisutne i faze W2C,W,W3C i mešoviti karbid ή – Co3W3C (Saha, et al., 2010, pp. 592-595. Zbog inkorporiranja vazduha u mlaz plazme i njegovog uticaja na redukciju ugljenika iz karbida, depozicija praha radi se srednjom snagom napajanja plazma-pištolja i sa helijumom kao plazma gasom. Helijum kao plemeniti gas ima velike prednosti kao plazma gas u odnosu na druge gasove. Eksperimentalna istraživanja karakteristika mlazeva plazmi pokazala su da izoterme blizu izlaza iz anode imaju manji prečnik za plazmu Ar-He u odnosu na Ar-H2. Dužina izotermi je takođe manja kod plazme Ar-He zbog manje specifične entalpije i  većeg viskoziteta u odnosu na Ar-H2. Gušća plazma, kao što je Ar-He, može znatno da smanji inkorporiranje okolnog vazduha u mlaz plazme. Mešanje mlaza plazme sa okolnim vazduhom povećava se sa povećanjem jačine strujnog luka i protokom plazma gasa (Roumilhac, et al., 1988, pp. 105-119, (Roumilhac, Fauchais, 1988, pp. 121-126. Helijum zbog ovih osobina omogućuje deponovanje karbidnih prevlaka sa umanjenim procesom dekarburizacije i sa manjim sadržajem  pora. Osobine prevlaka su u direktnoj vezi sa parametrima depozicije. Prah WC17Co razvijen je za potrebe vazduhoplovne industrije. Prevlake na bazi WC17Co su otporne na habanje, abraziju, eroziju, koroziju i kavitaciju do 500°C (Material Product Data Sheet, 2011. U ovom

  2. A decisão de abortar: processo e sentimentos envolvidos

    Directory of Open Access Journals (Sweden)

    Costa Rosely G.

    1995-01-01

    Full Text Available No Brasil, o aborto provocado é considerado crime na maioria das vezes, razão pela qual existem poucos dados oficiais sobre o assunto. Pouco se sabe acerca das condições em que é praticado. A pesquisa em questão foi realizada para conhecer as características das mulheres que abortaram e estudar as razões pelas quais o fizeram e as condições em que isso ocorreu. Foi enviado a todas as funcionárias (7359 e alunas (2231 dos cursos de graduação de uma universidade paulista um questionário a ser auto-respondido e devolvido pelo correio. Acompanhava o questionário uma carta e um envelope resposta-comercial. Responderam ao questionário e o devolveram 27% das funcionárias e 42% das alunas. Dessas, 1314 funcionárias e 138 alunas tinham tido pelo menos uma gravidez. Os resultados apresentados neste trabalho correspondem a 465 dessas funcionárias e alunas que alguma vez pensaram em fazer aborto. Elas foram divididas em dois grupos, segundo a decisão tomada de faze-lo ou não. O objetivo foi analisar a associação de algumas características das mulheres com a decisão de fazer ou não um aborto e como se sentiram frente a essa decisão. A proporção de mulheres que abortou foi significativamente menor entre as casadas do que entre as que tinham engravidado em outro tipo de relacionamento. Mais mulheres que conversaram com amigo(a e/ou marido/namorado/companheiro para decidir se fariam aborto o fizeram, comparadas com as que conversaram com parentes ou não conversaram com ninguém. Mais mulheres que disseram não estar preparadas para criar/educar uma criança abortaram, comparadas com as que deram outras razões. Quase metade das mulheres que abortaram disse que depois, se sentiu mal emocional ou fisicamente. Entre as que não fizeram o aborto, quase dois quintos deram como motivo para isso medo das conseqüências e falta de coragem. Do total de mulheres que não abortaram, mais de quatro quintos relataram ter-se sentido bem, feliz

  3. La naturalización de la violencia: Un análisis de fotografías antropométricas de principios del siglo XX

    Directory of Open Access Journals (Sweden)

    Alejandro Martínez

    2006-12-01

    Full Text Available Este artículo surge como consecuencia de la experiencia de rescate, identificación y clasificación de una serie de fotografías halladas en el Archivo Fotográfico del Museo de La Plata, a la luz de los lineamientos teóricos desarrollados por el Laboratorio de Investigaciones en Antropología Social (LIAS, UNLP, en torno a conceptualizaciones tales como etnicidad, identidad e interculturalidad. Estas fotografías de trabajadores indígenas, obtenidas en el ingenio azucarero La Esperanza (Jujuy, Argentina en los albores del siglo XX, expresan con la mayor de las crudezas y sin los reparos de la posibilidad de algún censor, o sea con total poder e impunidad, las condiciones de sometimiento que sufrieron los pueblos preexistentes hace apenas 100 años en nuestro país. Entendemos que la recuperación del contexto socio-histórico en que se produjeron y el análisis crítico de estos documentos fotográficos es un valioso aporte a la reconstrucción de nuestra memoria colectiva, brindando, a al vez, elementos que permiten repensar lo sucedido en el pasado reciente de nuestra sociedad.Este artigo e o resultado de um trabalho de resgate, identificação e classificação de uma série de fotografias avindas no Arquivo Fotográfico do Museu de La Plata, à luz das aproximações teoricas desenvolvidas no Laboratório de Investigaciones en Antropología Social LIAS (UNLP, com reispeto à conceitos tais como etnicidade, identidade e interculturalidade. Essas fotografias de trabalhadores indígenas, conseguidas no engenho açucareiro La Esperanza (Jujuy, Argentina a começos do século XX, espessam com a maior das cruezas e sem os receios da possibilidade de algum censor, ou seja, com total poder e impunidade, a submissão e a exploração que sofreram os povos preexistentes faze apenas 100 anos em nosso país. Entendemos que a recuperação do contexto sócio-histórico em que se produzieron e o análise crítico de estes documentos fotogr

  4. Broncofibroscopia Flexível e Tomografia Helicoidal Computorizada no diagnóstico do Carcinoma Pulmonar Não de Peq uenas Células

    Directory of Open Access Journals (Sweden)

    Ram Cicero

    1998-11-01

    Full Text Available RESUMO: Actualmente a avaliação dos Tumores Pulmonares e as alterações intratorácicas provocadas pelos mesmos pode ser analisada por Tomografia Axial Computorizada e Tomografia Helicoidal Computorizada (THC.Parece haver uma correlação entre as imagens detectadas pela Tomografia Helicoidal Computorizada (THC e as alterações cndoscópicas encontradas por Broncofibroscopia Flexível (BFB.O objectivo deste trabalho foi demonstrar essa eventual correlação.Estudaram-se 18 doentes com Carcinoma do Pulmão Não de Pequenas Células (CPNPC. Houve uma boa correlação da Tomografia Helicoidal Computorizada (THC e dos aspectos encontrados por Broncofibroscopia Flexível (BFB, nas estenoses intrínsecas ou extrínsecas dos Brônquios Principais (BP e Brônquios Lobares (BL.A Tomografa Helicoidal Computorizada (THC pennite a localização espacial do tumor e visualizar as alterações estruturais circunvizinhas secundánas ao crescimento do tumor. A Tomografia Helicoidal Computorizada (THC pennitiu ainda a visualização da árvore brônquica para além da obstrução completa do lúmen brônquico, nos doentes em que não se conseguiu visualizar por broncofibroscopia.Nos tumores periféricos houve demonstração pela Tomografia Helicoidal Computorizada (THC de alterações estruturais da árvore brônquica que por Broncofibroscopia Flexível (BFB foram consideradas normais.Nesta série houve uma correlação directa entre a Tomografia Helicoidal Computorizada (THC e a Broncofibroscopia Flexível (BFB em quinze dos dezoito doentes estudados havendo uma sensibilidade de 83% no diagnóstico do tumor por broncofibroscopia. COMENTÁRIO: A Tomografia Helicoidal Computorizada (THC permite faze r o diagnóstico do cancro do pulmão em três dimensões visualizando as alterações estruturais circunvizinhas.As alterações endoscópicas visualizadas por Broncofibroscopia Flexível (BFB continuam a ser importantes, pela análise macroscópica das lesões e

  5. On the Conversion of UF{sub 6} to UO{sub 2}; Conversion de UF{sub 6} en UO{sub 2}; O prevrashchenii UF{sub 6} v UO{sub 2}; Transformacion del UF{sub 6} en UO{sub 2}

    Energy Technology Data Exchange (ETDEWEB)

    Kolar, D.; Slivnik, J.; Volavsek, B. [Jozef Stefan Nuclear Institute, Ljubljana, Yugoslavia (Slovenia)

    1963-11-15

    reduccion del hexafluoruro de uranio con amoniaco en fase gaseosa a 40 deg. C. Mediante una pirohidrolisis con vapor de agua e hidrogeno entre 500 y 600 deg. C, transformaron en dioxido de uranio el producto de grano muy fino retenido en precipitadores electricos. Por analisis termodiferencial y termogravimetrico observaron el desarrollo de la reaccion. Determinaron el fluor y el oxigeno contenidos en el dioxido de uranio y examinaron su estructura cristalina por analisis roentgenografico. Evaluaron diversas caracteristicas fisicoquimicas tales como el area superficial especifica, las dimensiones de las particulas y la densidad del polvo vibrado. A partir del polvo, prepararon pastillas prensadas y sinterizadas a 1350 deg. C. Obtuvieron densidades, variables segun las diversas condiciones de preparacion, que alcanzaron hasta el 94% del valor teorico. (author) [Russian] Vosstanovleniem geksaftorida urana ammiakom v gazovoj faze pri 40 deg. C byl poluchen kompleksnyj ammonij ftorid urana. Ehtot melkij poroshok uderzhivalsya v ehlektroosaditelyakh i perevodilsya v dvuokis' urana metodom pirogidrolieha vodyanymi parami i vodorodom pri temperature ot 500 do 600 deg. C. Khod reaktsii kontrolirovalsya metodom termicheskogo i termogravimetricheskogo analizov. V dvuokisi urana analiticheski opredelyalos' soderzhanie ftora i kisloroda, a kristallicheskaya struktura proveryalas' metodom rentgenovskogo analiza. Opredeleny nekotorye fiziko- khimicheskie' kharakteristiki , kak udel'naya poverkhnost', razmer chastits i konechnaya plotnost' poroshka. Iz poroshka pressovalis' tabletki, kotorye spekalis' pri 1350 deg. C. V zavisimosti ot razlichnykh uslovij izgotovleniya byli dostignuty plotnosti do 94% teoreticheskoj. (author)

  6. Estudo comparativo das inclusões do alastrim e da vacina no macaco (Macacus rhesus A comparison of the inclusion bodies of alastrim and vaccinia in the monkey (Macacus rhesus

    Directory of Open Access Journals (Sweden)

    C. Magarinos Torres

    1934-02-01

    Full Text Available Vesiculas e pustulas contendo numerosas inclusões citoplasmicas nas celulas epidermicas, foram regularmente produzidas no macaco (Macacus rhesus, quer com o virus do alastrim, quer com o da vacina, após inoculação endovenosa e sem previa escarificação. O virus do alastrim parece menos virulento para essa especie de macaco que o da vacina. Ao passo que 12 macacos rhesus injetados por via endovenosa com sete amostras diferentes de virus do alastrim, após apresentarem com regularidade um infecção experimental, sobreviveram e se conservaram em boa saúde, a injecção endovenosa do virus da vacina recentemente preparado (polpa bruta produziu a morte em 2, dentre 4 animais experimentados. 2. - Foram notadas diferenças pequenas, mas nitidas, na morfologia das inclusões do alastrim e da vacina, em material fixado no liquido de Helly, incluido em parafina e corado pela hematoxilina-eosina. Dizem elas respeito ao numero de inclusões encontradas em cada celula epidermica e às suas reações de coloração. 3. - As inclusões do alastrim, quando apresentam grandes dimensões, conservam-se unicas ou solitarias no citoplasma das celulas epidermicas do macaco rhesus, e coram-se em tonalidade que varia do azul escuro ao cinzento-azulado. Comtudo, em celulas que sofreram necrose, ou naquelas contendo 2 a 4 inclusões de pequenas dimensões, por vezes elas se mostram coradas em roseo. 4. - As inclusões da vacina, quando em faze adeantada de desenvolvimento, são multiplas nas celulas epidermicas do macaco rhesus e mostram, regularmente, uma policromatofilia caracteristica.1. - Vesicles and pustules containing numerous cytoplasmic inclusion bodies within the epidermal cells were regularly produced in monkeys (Macacus rhesus by intravenous inoculation either of alastrim virus or of recently prepared vaccine emulsion, no previous scarifications being required. Alastrim virus seems less virulent for this species of monkey than the virus of vaccinia is

  7. A decisão de abortar: processo e sentimentos envolvidos

    Directory of Open Access Journals (Sweden)

    Rosely G. Costa

    1995-03-01

    Full Text Available No Brasil, o aborto provocado é considerado crime na maioria das vezes, razão pela qual existem poucos dados oficiais sobre o assunto. Pouco se sabe acerca das condições em que é praticado. A pesquisa em questão foi realizada para conhecer as características das mulheres que abortaram e estudar as razões pelas quais o fizeram e as condições em que isso ocorreu. Foi enviado a todas as funcionárias (7359 e alunas (2231 dos cursos de graduação de uma universidade paulista um questionário a ser auto-respondido e devolvido pelo correio. Acompanhava o questionário uma carta e um envelope resposta-comercial. Responderam ao questionário e o devolveram 27% das funcionárias e 42% das alunas. Dessas, 1314 funcionárias e 138 alunas tinham tido pelo menos uma gravidez. Os resultados apresentados neste trabalho correspondem a 465 dessas funcionárias e alunas que alguma vez pensaram em fazer aborto. Elas foram divididas em dois grupos, segundo a decisão tomada de faze-lo ou não. O objetivo foi analisar a associação de algumas características das mulheres com a decisão de fazer ou não um aborto e como se sentiram frente a essa decisão. A proporção de mulheres que abortou foi significativamente menor entre as casadas do que entre as que tinham engravidado em outro tipo de relacionamento. Mais mulheres que conversaram com amigo(a e/ou marido/namorado/companheiro para decidir se fariam aborto o fizeram, comparadas com as que conversaram com parentes ou não conversaram com ninguém. Mais mulheres que disseram não estar preparadas para criar/educar uma criança abortaram, comparadas com as que deram outras razões. Quase metade das mulheres que abortaram disse que depois, se sentiu mal emocional ou fisicamente. Entre as que não fizeram o aborto, quase dois quintos deram como motivo para isso medo das conseqüências e falta de coragem. Do total de mulheres que não abortaram, mais de quatro quintos relataram ter-se sentido bem, feliz

  8. The Problems of Controlling Defects in the Materials Used for the First Czechoslovak Nuclear-Power Station; Problemes de Controle des Defauts dans les Materiaux Utilises a la Premiere Centrale Nucleaire de Tchecoslovaquie; Problemy defektoskopicheskogo kontrolya stroitel'nykh materialov reaktora pervoj chekhoslovatskoj atomnoj ehlektrostantsii; Problemas de Control de Defectos en los Materiales Utilizados en la Primera Central Nuclear de Checoslovaquia

    Energy Technology Data Exchange (ETDEWEB)

    Radislav, Filipp [Zavody Im.V.I. Lenina, Pl' zen, Czechoslovakia (Czech Republic)

    1965-09-15

    . Igualmente, se compensa el efecto de la irregularidad del acoplamiento acustico; el dispositivo envia impulsos al dispositivo del registro a distancia. Las dimensiones del defecto se determinan con ayuda de un atenuador. En la actualidad, se esta montando una instalacion automatica que permitira proceder al control de la superficie de un cilindro vertical. En el caso de las soldaduras, es necesario efectuar el control en la parte exterior a temperatura elevada. Con esa finalidad, en la fabrica 'V.I. Lenin' d e Pilsen se ha construido un dispositivo especial que permite procecer a controles de gran exactitud a altas temperaturas. El control no destructivo de los elementos soldados se efectua igualmente por rayos X. La medicion de pequenosi espesores y del metal base de una soldadura se hace mediante rayos X caracteristicos, utilizando chasis especiales. En la radioscopia de piezas soldadas de gran espesor se recurre a un betatron de procedencia checoslovaca. En la memoria se describe la tecnica de los ensayos, los resultados obtenidos y se comparan las caracteristicas del mencionado betatron de 15 MeV con otro construido por la firma Siemens. (author) [Russian] Daetsja kratkoe opisanie korpusa reaktora pervoj chehoslovackoj atomnoj jelektrostancii. Vysokie tre- bovanija k konstrukcii i tehnologii izgotovlenija korpusa reaktora, vypolnennogo iz nizko- legirovannoj nestarejushhej stali (tolshhina stenok 650 mm), priveli k neobhodimosti razra- botki metoda 'svidetelej' dlja kontrolja prochnosti konstrukcii bez razrushenija osnovnogo materiala i svarnyh soedinenij. Dlja kontrolja kachestva osnovnogo materiala i svarnyh soedinenij v bol'shoj mere is- pol'zuetsja ul'trazvukovoj impul'snyj metod s primeneniem odnogo zonda. Daetsja opisanie metodiki ispytanij i ocenki pokazanij vo vremja issledovanija osnovnogo materiala, a takzhe metodiki ispytanija kachestva jelektroshlakovyh svarnyh soedinenij, svarnyh soedinenij, provedennyh v atmosfere uglekislogo gaza , i ruchnyh dugovyh

  9. Isotopic data to study the mechanism of the oxidation of mercaptoacetic acid; Donnees isotopiques pour l'etude du mecanisme d'oxydation de l'acide mercaptoacetique; Izotopnyj metod issledovaniya mekhanizma okisleniya merkapgouksusnoj kisloty; Estudio del mecanismo de oxidacion del acido mercaptoacetico por medio de datos obtenidos con radioisotopos

    Energy Technology Data Exchange (ETDEWEB)

    Gal, D [Central Isotope Laboratory, University of Szeged (Hungary); Guczi, L [Department of Radiology, Elelmiszeripari Kutato Intezet, Budapest (Hungary)

    1962-03-15

    comparacion de esos resultados con otros datos cineticos, se puede demostrar que la autooxidacion del acido mercaptoacetico en fase liquida constituye una reaccion en cadena ramificada, una de cuyas ramas principales es la formacion de Na{sub 2}S y su oxidacion subsiguiente. Los autores tambien comprobaron que el sulfato que aparece durante la reaccion, procede exclusivamente del sulfuro inorganico. El hierro cataliza la formacion de disulfuro organico y, por lo tanto, ejerce tambien influencia sobre la formacion del sulfuro. (author) [Russian] Mnogie issledovateli izuchali protsessy samookisleniya slozhnykh veshchestv, soderzhashchikh merkaptonovuyu gruppu, s pomoshch'yu molekulyarnogo kisloroda v zhidkoj faze. Ukazyvalos', chto vo vremya reaktsii obrazuetsya sul'fid, no do sikh por ne udavalos' opredelit' tochnogo mekhanizma ehtogo protsessa. Bylo provedeno issledovanie okisleniya merkaptouksusnoj kisloty pri 50{sup o} i pri pH = 8 kak v prisutstvii kompleksona IV, tak i v prisutstvii zheleza. V sistemu byl vveden Na{sub 2}S, mechennyj S{sup 35}, i bylo ustanovleno, chto Na{sub 2}S znachitel'no uvelichivaet skorost' zakhvata kisloroda kak pri protsesse katalizirovannym zhelezom, tak i v protsesse, svobodnom ot ionov zheleza. Vo vremya reaktsii byli izmereny kontsentratsiya sul'fida, ego udel'naya aktivnost' i obshchaya aktivnost'. Na osnovanii ehtikh dannykh i blagodarya vyrabotannomu Nejmanom i ego sotrudnikami kineticheskomu metodu izotopov, predstavilos' vozmozhnym podschitat' temp obrazovaniya sul'fida i ego dal'nejshego okisleniya. Sopostavlenie ehtikh dannykh s drugimi kineticheskimi dannymi pokazalo, chto okislenie merkaptouksusnoj kisloty v zhidkoj faze yavlyaetsya tsepnoj reaktsiej odna iz glavnykh tsepej v ehtoj reaktsii obrazuetsya posredstvom obrazovaniya Na{sub 2}S i ego dal'nejshego okisleniya. Krome togo, bylo ustanovleno, chto vo vremya reaktsii obrazuetsya sul'fat, no tol'ko cherez posredstvo neorganicheskogo sul'fida. Zhelezo katalizirovalo obrazovanie

  10. Recovery of Mice Thymus after X-Rays and 15 MeV Electrons. Comparative Study of the Cell Population Using Tritiated Thymidine; Regeneration du Thymus chez la Souris Apres Irradiation par des Rayons X et des Electrons de 15 MeV. Etude Comparee de la Population Cellulaire a l'Aide de Thymidine Tritiee; 0412 043e 0414 ; Restauracion del Timo de los Ratones Despues de Irradiarlo con Rayos X y Electrones de 15 MeV. Estudio Comparativo de la Poblacion Celular Utilizando Timidina Tritiada

    Energy Technology Data Exchange (ETDEWEB)

    Biagini, C.; Paleani Vettori, P. G.; Zito Bignami, R. [Istituto di Radiologia dell' Universita and Comitato Nazionale per l' Energia Nucleare, Rome (Italy)

    1962-02-15

    mamiferos por rayos X de 150 kVp y por electrones de 15 MeV emitidos por un betatron. En la memoria se exponen los resultados de un estudio autorradiografico sobre el comportamiento de diferentes clases de celulas del timo de los ratones, en el que se ha utilizado timidina tritiada como precursor del acido desoxirribonucleico. Los datos se relacionan con las modificaciones de la distribucion de tamanos en la poblacion celular y con el peso del organo. Despues de la irradiacion, aumenta la razon macrocitos/microcitos y la incorporacion de timidina tritiada disminuye tanto en los linfocitos grandes como en los pequenos. Durante la fase en que los efectos se manifiestan con mayor intensidad, no se observan diferencias significativas entre los rayos X y los electrones en cuanto al tamano de las celulas o la marcacion de los macrocitos. En la marcacion de los microcitos se advierte una variacion relativa que concuerda con los datos referentes al peso del organo y que puede estar relacionada con el valor de la EBR de los electrones rapidos. En la fase de restauracion, las celulas menos diferenciadas proliferan activamente, pero el porcentaje de linfocitos maduros sigue siendo bajo. Despues de la exposicion a electrones de 15 MeV, la actividad de proliferacion de los macrocitos aumenta, segun la curva de la atrofia del timo en funcion del tiempo. A juzgar por estos resultados, la capacidad de regeneracion parece estar relacionada con la gravedad de la lesion de las celulas primitivas; para una dosis determinada, esta ultima es mayor cuando la irradiacion se efectua con rayos X que cuando se realiza con electrones. (author) [Russian] Mehanizm vosstanovlenija posle ostrogo radiacionnogo porazhenija mozhet byt' izuchen pri pomoshhi ispol'- zovanija radiacii dvuh vidov s nebol'shoj raznicej v zhestkoj otnositel'noj biologicheskoj jeffektivnosti, no so znachitel'nymi rashozhdenijami rezul'tatov v faze vosstanovlenija. Na osnovanii nabljudenij pri predydushhih onpytah zto usldovie

  11. Measurement of the Anisotropy of Diffusion Constant in Media with Empty Channels; Mesure de l'Anisotropie de la Constante de Diffusion dans des Milieux a Canaux Vides; Izmerenie anizotropii postoyannoj diffuzii v srede s pustymi kanalami; Medicion de la Anisotropia de la Constante de Difusion en Varios Sistemas con Canales Vacios

    Energy Technology Data Exchange (ETDEWEB)

    Copic, M.; Kalin, T.; Pregl, G.; Zerdin, F. [Nuclear Institute Jozef Stefan, Ljubljana, Yugoslavia (Slovenia)

    1964-04-15

    medio de la constante de difusion a partir de mediciones efectuadas en cubos. La diferencia entre ambas constantes de difusion, D{sub Double-Up-Tack} y D{sub Up-Tack }, concuerda con los valores predichos teoricamente dentro de los limites de error experimental; sin embargo, la constante media de difusion es sistematicamente inferior a los valores calculados segun la teoria de Behrens. (author) [Russian] S pomoshh'ju istochnika impul'snyh nejtronov v sistemah s pustymi kanalami izmerjalas' postojannaja diffuzii. Organicheskoe steklo ispol'zovalos' v kachestve materiala dlja rasseivanija nejtronov. V rezul'tate provedenija razdel'nyh serij ispytanij na prjamougol'nyh blokah opredeljalis' postojannye diffuzii v napravlenijah parallel'no i perpendikuljarno kanalam. Srednee znachenie postojannoj diffuzii bylo polucheno takzhe opytnym putem v rezul'tate izmerenij na kubicheskih blokah. Razlichie mezhdu jetimi dvumja postojannymi diffuzii D{sub Double-Up-Tack} - D{sub Up-Tack} soglasuetsja s teoreticheskimi predpolozhenijami v predelah jeksperimental'nyh oshibok, tem ne meneee srednjaja postojannaja diffuzii sistematicheski lezhit nizhe predpolozhenij teorii Berensa. (author)

  12. The use of radiotracer techniques to study lubrication and wear in large diesel engines; Emploi des indicateurs radioactifs pour l'etude de la lubrification et de l'usure dans les moteurs diesel de grande puissance; Ispol'zovanie metodov radioaktivnykh indikatorov dlya izucheniya smazki i iznosa bol'shikh dizel'nykh motorov; Aplicacion de los indicadores radiactivos al estudio de la lubricacion y desgaste de los motores diesel de gran potencia

    Energy Technology Data Exchange (ETDEWEB)

    Howes, Jr, J E; Braun, W J; Sunderman, D N [Battelle Memorial Institute, Columbus, OH (United States)

    1962-01-15

    iznosa bol'shikh dizel'nykh motorov v masshtabe, kotoryj do sikh por schitalsya prakticheski neosushchestvimym. Kak potreblenie smazochnogo masla, tak i iznos rubashki tsilindra opredelyalis' v funktsii ot rabochikh uslovij dizelya moshchnost'yu okolo 1000 tormoznykh loshadinykh sil. Byl vyrabotan metod mecheniya 200 gallonov smazochnogo masla 60 millikyuri tsinka-65 i opredeleniya potrebleniya masla pri pomoshchi vzyatiya obraztsov gazov vykhlopa pri rabote motora v raznoobraznykh usloviyakh. Izmerenie potrebleniya smazochnogo masla moglo byt' proizvedeno za 10 minut vremeni, vmesto 24 ili 48 chasov, trebovavshikhsya ran'she. Byl vyrabotan metod aktivatsii nejtronami nizshej chasti tsilindra dlinoyu v 48 dyujmov i diametrom rubashki v 8 dyujmov. Nadlezhashchee ehkranirovanie teplovykh nej- tronov dalo vozmozhnost' poluchit' marganets-54 s 300-dnevnym periodom poluraspada; issledovanie iznosa privelo k udlineniyu poleznogo sroka sluzhby rubashki v 6-8 raz po sravneniyu s analogichnoj rubashkoj, aktivirovannoj termicheski dlya proizvodstva zheleza-59. To obstoyatel'stvo, chto issledovaniya s takimi bol'shimi kolichestvami radioaktivnogo materiala mogut vypolnyat'sya v oblasti dizelej na normal'noj issledovatel'skoj ustanovke, otkryvaet sovershenno novuyu oblast' primeneniya indikatorov. Izbiratel'naya aktivatsiya i tselesoobraznoe ispol'zovanie ehkranirovaniya teplovykh nejtronov uvelichivayut raznoobrazie vozmozhnostej ispol'zovaniya metodov indikatorov; izmereniya sosredotochivayutsya na interesuyushchem meste, i tem samym sokrashchaetsya obshchee kolichestvo trebuemogo dlya izucheniya iznosa krupnykh detalej radioaktivnogo materiala; vmeste s tem odnovremenno oblegchaetsya izmerenie iznosa detalej motora iz materialov s odinakovym khimicheskim sostavom. (author)

  13. The Formation of Polymeric Products in Reactions of Polyvalent Recoil Atoms; Formation de Polymeres lors de Reactions Provoquees par des Atomes de Recul Polyvalents; Obrazovanie polimernykh produktov pri reaktsiyakh polivalentnykh atomov otdachi; Formacion de Polimeros en las Reacciones de Atomos de Retroceso Polivalentes

    Energy Technology Data Exchange (ETDEWEB)

    Dzantiev, B. G.; Stukan, R. A.; Shvedchikov, A. P.; Shishkov, A. V. [Institut Himicheskoj Fiziki AN SSSR, Moskva, SSSR (Russian Federation)

    1965-04-15

    mechenyh polimernyh produktov v processe himicheskoj stabilizacii atomov otdachi sery-35 i ugleroda-14, poluchajushhihsja po jadernym reakcijam Cl{sup 35} /n, p/S{sup 35} i N{sup 14}/n, p/C{sup 14} v gazovoj i zhidkoj fazah. Mozhno predpolozhit', chto v processe stabilizacii gorjachie atomy ugleroda obrazujut metilenovye biradikaly, kotorye po svoej sposobnosti vstupat' v reakciju vo mnogom napominajut povedenie atomarnoj sery. Issledovanija provodilis' kak dlja parafinovyh (CH{sub 4}, C{sub 2}H{sub 6}), tak i dlja ciklicheskih (ciklogeksan, ciklogeksen, benzol) uglevodorod. Oblucheniju podvergalis' binarnye sistemy uglevodorod-datchik gorjachih atomov S{sup 35} i C{sup 14}. V kachestve poslednego ispol'zovalis' soedinenija CCI{sub 4}, HCl i ammiak. Obluchenie provodilos' na reaktore tipa IRT-1000 pri potoke teplovyh nejtronov 10{sup 11} - 10{sup 12} neJtron/cm{sup 2}sek. Pokazano, chto dlja razlichnyh soedinenij v zhidkoj faze do 60-90% sery-35 stabilizuetsja v forme polimera, vyhod kotorogo jekstremal'no zavisit ot sostava, prohodja cherez maksimum pri sootnoshenii komponentov, blizkom k jekvimolekuljarnomu. V gazovoj faze vyhod polimera sostavljaet 30 - 40% ot obshhej aktivnosti. Metodom radiohromatografii na bumage ustanovleno, chto mechenye polimernye produkty imejut slozhnyj sostav i predstavljajut soboj smes' dvuh kachestvenno otlichnyh tipov soedinenij, vyhod kotoryh po-raznomu menjaetsja v zavisimosti ot sootnoshenija komponentov. Uvelichenie vremeni obluchenija privodit k rostu vyhoda mechenogo polimera. V sluchae zhidkofaznoj sistemy C{sub 6}H{sub 12}-CCl{sub 4} molekuljarnyj ves S{sup 35}-soderzhashhego polimera, opredeljalsja metodom diffuzii iz kapilljara i okazalsja ravnym 5000 dlja polimera odnogo tipa i 500 - 1000 dlja drugogo. Obrazovanie vysokokipjashhego mechenogo produkta nabljudalos' takzhe pri obluchenii chistogo CCI{sub 4}. Analogichnye opyty provodilis' v sisteme jetilen -ammiak v gazovoj faze pri vysokom davlenii. Pokazano, chto v jetom sluchae

  14. Mehanička svojstva i mikrostruktura vakuum plazma naprskane Cr3C2 - 25(Ni20Cr prevlake / Mechanical properties and microstructure of vacuum plasma sprayed Cr3C2 – 25(Ni20Cr coatings / Механические свойства и микроструктура покрытия Cr3C2 - 25(Ni20Cr нанесенного методом вакуумного плазменного напыления

    Directory of Open Access Journals (Sweden)

    Mihailo R. Mrdak

    2015-04-01

    Full Text Available U radu je analizirana vakuum plazma sprej prevlaka VPS – Cr3C2 - 25(Ni20Cr. Upotrebljen je komercijalni prah oznake Sulzer Metco Woka 7205. Prah je deponovan sa plazma pištoljem F4 na odstojanju substrata od 340 mm. Glavni cilj rada bio je da se na smanjenom pritisku inertnog gasa Ar eliminiše razgradnja primarnog karbida Cr3C2 u karbid Cr23C6 koji bitno umanjuje mikrotvrdoću i mehaničke karakteristike prevlake. Prevlaka je deponovana debljine od 100 do 120 µm na čeličnom substratu. Mikrotvrdoća prevlake ispitana je metodom HV0.3. Vrednosti mikrotvrdoće bile su u rasponu od 1248 do 1342 HV0.3. Čvrstoća spoja prevlake ispitana je metodom na zatezanje. Utvrđeno je da čvrstoća spoja između substrata i prevlake ima vrednost 89 MPa. Mikrostruktura prevlake ispitana je tehnikom svetlosne mikroskopije. Struktura prevlake sastoji se od osnove NiCr legure sa dominantnom primarnom karbidnom fazom Cr3C2. Pored Cr3C2 faze prisutna je i faza Cr7C3. Nagrizanje prevlake urađeno je reagensom 1HNO3: 4HCl: 4H2O koji prvenstveno rastvara Ni da bi se videla raspodela karbidne faze u prevlaci. Nagrizanjem prevlake reagensom utvrđeno je da je u slojevima prevlake u velikom udelu prisutna primarna nerazgrađena karbidna faza Cr3C2 koja prevlaci daje visoke vrednosti mikrotvrdoće. / This paper analyzes vacuum plasma spray VPS - Cr3C2 - 25(Ni20Cr coatings. Commercial powder marked Sulzer Metco Woka 7205 is used. The powder is deposited with a plasma gun F4 at a distance of 340 mm from the substrate. The main objective of the study was to eliminate, at the reduced pressure of inert gas Ar, the degradation of primary Cr3C2 carbide into Cr23C6 carbide which significantly reduces the microhardness and mechanical properties of the coating. The coating is deposited with a thickness of 100 - 120 µm on a steel substrate. The microhardness of the coating was tested by HV0.3. The microhardness values were in the range of 1248 - 1342 HV0.3. The bond strength

  15. Non-Destructive Testing of Plutonium-Enriched Fuel Rods; Controles non Destructifs de Barreaux Combustibles Enrichis au Plutonium; Nedestruktivnyj-kontrol' toplivnykh sterzhnej''obogashchennykh plutoniem; Ensayo no Destructivo de Elementos Combustibles Enriquecidos en Plutonio

    Energy Technology Data Exchange (ETDEWEB)

    Libotte, P.; Inniger, H.; Leblanc, J. M. [Centre D' Etude de l' Energie Nucleaire, Societe Belge pour l' Industrie Nucleaire, S.A. (Belgonucleaire), Mol (Belgium)

    1965-09-15

    , germetichnost' sterzhnej, plotnost' toplivnogo materiala i ego raspredelenie, obogashhenie plutoniem i e g o radial'noe i osevoe rasprostranenie v toplivnom sterzhne. Metody, primenennye dlja opytov, sostojat v osnovnom iz issledovanij s pomoshh'ju radio- grafii, radioavtografii, gammagrafii i ul'trazvukov. Izlagaetsja princip kazhdogo iz provedennyh izmerenij, dlja kazhdogo sluchaja daetsja opisanie apparatury i jekspluatacionnyh metodov, primenennyh dlja poluchenija zhelaemoj chuvstvitel'nosti i tochnosti. S pomoshh'ju radiografii metod pozvoljaet obnaruzhivat' treshhiny ot 50 do 60 mikron na svarkah koncov toplivnyh sterzhnej. Poskol'ku toplivo uplotnjaetsja vibraciej treh chastej plotnogo poroshka, iz kotoryh tol'ko melkaja chast' neset v s e b e obogashhenie plutoniem, to vazhno, chtoby raspredelenie poslednego i raspredelenie plotnosti bylo tochno ustanovleno. Otschet vyhodjashhego gamma- izluchenija plutonija pozvoljaet opredelit' prodol'noe rasprostranenie poslednego s tochnost'ju vyshe {+-}2% v sluchae sovershenno radial'nogo raspredelenija, a ono opredeljaetsja glavnym obrazom oblucheniem fotojemul'sii. Osevoe raspredelenie plotnosti toplivnogo materiala ustanavlivaetsja s tochnost'ju vyshe {+-}1% putem izmerenija nepogloshhennoj frakcii gamma- izluchenija ot vneshnego istochnika, t.e. cezija-137 ili iridija-192. Treshhiny razmerom 10 mi- kron mogut byt' obnaruzheny s pomoshh'ju ul'trazvukov metodom otrazhenija voln. Otnositel'nye preimushhestva kazhdogo iz metodov bez razrushenija issledujutsja s uchetom zhelaemoj tochnosti i ih vozmozhnogo primenenija dlja avtomaticheskogo kontrolja za toplivny- mi sterzhnjami s plutoniem, kotorye byli izgotovleny v promyshlennosti. (author)

  16. Professional Nuclear Materials Management; Gestion Industrielle des Matieres Nucleaires; Obrashchenie s yadernymi materialami na professional'nom urovne; Administracion Eficiente de Materiales Nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Forcella, A. A.; O' Leary, W. J. [Allis-Chalmers Manufacturing Company, Bethesda, MD (United States)

    1966-02-15

    ) priobretenija topliva i toplivnyh jelementov do ih ispol'zovanija v reaktore, b) pri ispol'zovanii topliv- nyh jelementovv reaktore, i v) pri regeneracii topliva posle ispol'zovanija v reaktore. Vo vremja planirovanija i osushhestvlenija operacij s toplivom do e g o ispol'zovanija v reaktore vazhno, chtoby predusmatrivalas' jekonomija toplivnyh jelementov pri izgotovlenii, obrabotke, transportirovke, a takzhe predusmatrivalas' ih zamenimost'. Grafik provedenija proizvodstvennyh operacij dolzhen obespechivat' svedenie k minimumu poter' pribyli v rezul'tate neproduktivnogo ''mertvogo'' hranenija dorogostojashhih materialov. Pri provedenii operacij vnutri reaktora neobhodimo dobivat'sja maksimal'no vozmozh- noj stepeni vygoranija rasshhepljajushhegosja materiala putem osushhestvlenija sootvetstvujushhih shem peregruppirovki toplivnyh jelementov. Odnovremenno neobhodimo vsjacheski umen'shat' vremja, neproduktivno zatrachivaemoe na peregruppirovku toplivnyh jelementov na ostanovlennom reaktore, na inspekcii i t.d. Vo vremja operacij s jadernymi materialami posle ih ispol'zovanija v reaktore, kogda stepen' obogashhenija topliva dostigla urovnja predvaritel'no ustanovlennogo obednenija rasshhepljajushhegosja materiala, administrator v oblasti jadernyh materialov dolzhen obespechit' naibolee jekonomichnuju pererabotku i regeneraciju rasshhepljajushhihsja materialov i pobochnyh produktov. Obrashhenie s jadernymi materialami sootvetstvenno predstavljaet soboj vazhnyj faktor v dele osushhestvlenija konkurentosposobnogo toplivnogo cikla i podderzhanija sootvetstvujushhe- go urovnja rashodov na edinicu jenergii na jenergeticheskih reaktorah. (author)

  17. Non-Destructive Testing in Reactor Pressure-Vessel Fabrication; Essais non Destructifs dans la Fabrication des Caissons Etanches de Reacteurs; Nedestruktivnoe ispytanie pri izgotovlenii reaktornykh bakov vysokogo davleniya; Ensayo no Destructivo Durante la Fabricacion de Recipientes de Presion para Reactores

    Energy Technology Data Exchange (ETDEWEB)

    McGonnagle, W. J. [Fluids Dynamics Research, Iit Research Institute, Chicago, IL (United States)

    1965-09-15

    las tecnicas especializadas propias del ensayo no destructivo de recipientes de presion y sus componentes. Se da una idea general de las normas y especificaciones pertinentes, tales como el Codigo de Calderas y Recipientes de Presion, de la American Society for Mechanical Engineers, y de otras organizaciones de supervision. Se analiza la manera en que el ensayo no destructivo puede contribuir a satisfacer las especificaciones y requerimientos de esas diversas organizaciones, y tambien la conveniencia y posibilidad de aplicar las normas usadas en tales casos. Se sugieren criterios realistas, pero apropiados, de aceptacion y rechazo. Se esboza un procedimiento que permitira y ayudara al personal dedicado a estos ensayos, a cumplir adecuadamente sus funciones en el momento apropiado del ciclo de fabricacion. Se discute la relacion existente entre el grupo de ensayos no destructivos y los demas grupos que intervienen en la fabricacion de los recipientes de presion. (author) [Russian] Cel' raboty zakljuchaetsja v tom, chtoby dat' kratkoe opisanie programmy kontrolja kachestva konstrukcii i izgotovlenija reaktornogo baka vysokogo davlenija, kotoryj udovletvorjaet vsem trebovanijam s tochki zrenija jadernogo processa i bezopasnosti jekspluatacii, a takzhe pokazat' znachenie nedestruktivnogo ispytanija v dostizhenii jetoj celi. Defekty materialov, komponentov i sborki pokazali, chto nashi nyneshnie metody izgotovlenija javljajutsja nedostatochnymi dlja obespechenija mnogokratnoj nadezhnosti kriticheskih komponentov. Treshhiny i neodnorodnost' v strukture materiala byvajut dazhe togda, kogda ispol'zujutsja nailuchshie processy i dolzhnym obrazom kontroliruemye metody i procedury. Neobhodima bolee sovershennaja kompleksnaja programma nedestruktivnyh ispytanij dlja togo, chtoby obespechit' takoj uroven' kachestva, kotoryj trebuetsja dlja reaktornogo baka vysokogo davlenija. Izgotoviteli takih bakov ispol'zujut sledujushhie metody nedestruktivnyh ispytanij: vizual

  18. Analysis of the Volatile Constituents of Irradiated Apple Juice; Analyse des Constituants Volatils des Jus de Pommes Irradies; Mezhdunarodnyj proekt po oblucheniyu fruktov i fruktovykh sokov; Analisis de los Componentes Volatiles de los Zumos de Manzana Irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Dubois, P.; Zenz, H.; Stehlik, G.; Kaindl, K. [Agence Europeenne pour l' Energie Nucleaire, Seibersdorf (Austria)

    1966-11-15

    contenian ya sustancias volatiles antes de la irradiacion. En los zumos de manzana, la irradiacion hace aparecer cinco aldehidos: acetico, isobutirico, butirico, isovalerico y capronico; en los zumos concentrados solo se han observado tres: acetico, isobutirico e isovalerico. En estos zumos concentrados aparece, ademas, 2-butanona p'ero en los no concentrados el maximo que le corresponde en los cromatogramas queda enteramente cubierto por el del etanol. Se ha comprobado la formacion de.furano y de dos compuestos que solo aparecen como vestigios y que no han podido ser aun identificados. Se han obtenido resultados analogos mediante pasterizacion realizada por embotellamiento en caliente. (author) [Russian] V ramkah Mezhdunarodnogo issledovatel'skogo proekta po konservirovaniju fruktov i fruktovyh sokov metodom obluchenija (Zajbersdorf) organolepticheskie issledovanija, a takzhe ispytanija na bezvrednost' delajut neobhodimym .provedenie analiza aromaticheskih veshhestv, obluchennyh i neobluchennyh sokov. Analizirovalis' letuchie veshhestva obluchennyh jablochnyh sokov metodom hromatografii v gazovoj faze putem neposredstvennogo vvedenija parov', ispuskaemyh sokami, libo pri rabochej temperature libo pri 60 Degree-Sign - 100 Degree-Sign (Head Space Techniguede Weurman). Identifikacija proizvodilas' putem sravnenija ob{sup e}mov uderzhanija s ob{sup e}mami chistyh veshhestv i pri pomoshhi himicheskih reaktivov, kotorye pozvoljali ustranjat' nekotorye komponenty para. Dlja uproshhenija analizov pervye issledovanija provodilis' s koncentratami jablochnyh sokov, ne soderzhavshih pered oblucheniem letuchih veshhestv. Pri obluchenii v jablochnom soke pojavljajutsja pjat' al'degidov: acetal'degid, izomaslja- nyj al'degid, masljanyj al'degid, izovaler'janovyj al'degid i kapronal'degid. V koncentrirovannyh sokah pojavljajutsja tol'ko tri al'degida: acetal'degid, izomasljanyj al'degid i izovaler'janovyj al'degid. Krome togo, v koncentrirovannyh sokah pojavljaetsja 2-butanon, no

  19. Late Quaternary chronology of paleo-climatic changes in Caspian Sea region based on Lower Volga sections

    Science.gov (United States)

    Kurbanov, Redzhep; Yanina, Tamara; Murray, Andrew; Svitoch, Alexander; Tkach, Nikolai

    2017-04-01

    Valdai glaciation. Lower soil horizon that has no dating, logically refers to the maximum warm era of Mikulino interglacial (MIS 5e). In the history of Caspian Sea this era responded to Late Khazarian transgressive-regressive stage (MIS 5): Late Khazarian minor transgression (level of about -10 m), characterized by warm-water, and the Hirkanian transgression with slightly cool environmental conditions. Both transgressive basins did not reach latitude of Srednyaya Akhtuba. Continuous stage of continental development of the territory, reflected in the structure of the section (layers 13-8), in the stratigraphic scheme of the Caspian region refers to Atelian formation, situated between Late Khazarian and Khvalynian transgressive epochs of the basin. Different facies complex (layers 11-9) of alluvial deposits of the section reflects the stage of initial development stage of Khvalynian transgression of the Caspian Sea - the accumulation of alluvium strata in raising erosion basis conditions, responding to interstadial Inter-Valdai warming era (MIS 3). Late Pleistocene continental development stage ends with faze of accumulation of loess sandy loam (layer 8). Obviously, it correlates with the last glacial maximum (MIS 2), dry cold era, conditions of which were not conducive to the development of the Caspian transgression - it was regressive (eltonskaya regression?) stage. Thus, the continental Atelian era of the upper (Volgograd) area of the Lower Volga region reflects three distinct paleogeographic events of the Caspian Sea history: 1. Atelian Caspian regression in conditions of Kalinin glaciation (MIS 4); 2. The initial stage of Khvalynian transgression under interstadial warming (MIS 3); 3. Regression, corresponding Ostashkovski glaciation (MIS 2). This sediments complex represents Atelian formation in Caspian region stratigraphic scheme, the amount of which is beyond the scope of the same name regression (Atelian). "Marine" stage of area development is expressed in

  20. Korišćenje satelitskih snimaka za vođenje radne karte / Use of satellite images in situation map design

    Directory of Open Access Journals (Sweden)

    Miodrag D. Regodić

    2010-01-01

    Full Text Available Radna karta je nezaobilazan činilac pri neprekidnom praćenju situacije i donošenju odluka u svim periodima pripreme, vođenja i otklanjanja posledica ratovanja. Zato je neophodno da sadržaj radne karte omogući vizuelno jasan, pravovremen, tačan i proveren pregled situacije. Do podataka za radnu kartu dolazi se pomoću svih načina i sredstava za izviđanje i snimanje stanja i rasporeda snaga sukobljenih strana. Svi načini i sredstva za prikupljanje podataka za vođenje radne karte su značajni, jer se međusobno dopunjuju i doprinose da su podaci provereni i tačni. U radu su predstavljene faze obrade, analize i interpretacije digitalnih satelitskih snimaka za potrebe izrade i vođenja radne karte. / Introduction Working (situation map is one of the most important, and often the only military document necessary during preparations for combat actions, while taking them and after finishing them. The most important and the most reliable data for mapmaking and updating a working map are derived as a result of action of different systems for surveillance and reconnaissance. It is intended for situation estimation, decision-making, creating plans, monitoring of combat actions, reporting, communicating and information. The working map, as a graphic military document, is designed on a topographic or digital base, or on any other geo-space display form. On a working map, a real or modeled combat situation is presented by graphic symbols, abbreviations and some textual comments, for the purpose of commanding during preparation and deploying combat actions. PREPARATION, DESIGN AND UPDATING OF A WORKING MAP Preparation of a working map includes certain activities that depend on the method of design of a future situation map: manual or computer-based. Preparation for manual mapmaking Preparation for manual design of a working map includes: selection of the scale and sheets of the map; joining and gluing of the map; preparation of tools for updating

  1. A decisão de abortar: processo e sentimentos envolvidos The decision to abort: the process and feelings involved

    Directory of Open Access Journals (Sweden)

    Rosely G. Costa

    1995-03-01

    Full Text Available No Brasil, o aborto provocado é considerado crime na maioria das vezes, razão pela qual existem poucos dados oficiais sobre o assunto. Pouco se sabe acerca das condições em que é praticado. A pesquisa em questão foi realizada para conhecer as características das mulheres que abortaram e estudar as razões pelas quais o fizeram e as condições em que isso ocorreu. Foi enviado a todas as funcionárias (7359 e alunas (2231 dos cursos de graduação de uma universidade paulista um questionário a ser auto-respondido e devolvido pelo correio. Acompanhava o questionário uma carta e um envelope resposta-comercial. Responderam ao questionário e o devolveram 27% das funcionárias e 42% das alunas. Dessas, 1314 funcionárias e 138 alunas tinham tido pelo menos uma gravidez. Os resultados apresentados neste trabalho correspondem a 465 dessas funcionárias e alunas que alguma vez pensaram em fazer aborto. Elas foram divididas em dois grupos, segundo a decisão tomada de faze-lo ou não. O objetivo foi analisar a associação de algumas características das mulheres com a decisão de fazer ou não um aborto e como se sentiram frente a essa decisão. A proporção de mulheres que abortou foi significativamente menor entre as casadas do que entre as que tinham engravidado em outro tipo de relacionamento. Mais mulheres que conversaram com amigo(a e/ou marido/namorado/companheiro para decidir se fariam aborto o fizeram, comparadas com as que conversaram com parentes ou não conversaram com ninguém. Mais mulheres que disseram não estar preparadas para criar/educar uma criança abortaram, comparadas com as que deram outras razões. Quase metade das mulheres que abortaram disse que depois, se sentiu mal emocional ou fisicamente. Entre as que não fizeram o aborto, quase dois quintos deram como motivo para isso medo das conseqüências e falta de coragem. Do total de mulheres que não abortaram, mais de quatro quintos relataram ter-se sentido bem, feliz

  2. Optical Density Control of Autoradiographs After Photographic Processing (Preliminary Results); Controle de la Densite Optique des Autoradiogrammes Apres Developpement Photographique. (Resultats Preliminaires); Regulirovanie opticheskoj plotnosti avtoradiogramm posle fotoobrabotki; Control de la Densidad Optica de las Autorradiografias Despues del Tratamiento Fotografico. (Resultados Preliminares)

    Energy Technology Data Exchange (ETDEWEB)

    Baptista, A. M. [Comissao de Estudos de Energia Nuclear, Instituto de Alta Cultura, Lisbon (Portugal); Terrinha, A. [Instituto Portugues de Oncologia, Lisbon (Portugal)

    1965-10-15

    ) [Russian] Vo mnogih- sluchajah primenenija fotojemul'sij celesoobrazno regulirovat' opticheskuju plotnost' posle fotograficheskoj obrabotki. Jeto sleduet delat', naprimer, pri izuchenii opredelennyh problem fotograficheskoj dozimetrii, i osobenno vo mnogih sluchajah primenenija avtoradiografii v medicine i biologii. Pri jetom mozhno poluchit' informaciju, nesmotrja na perederzhku, kotoraja neizbezhno proishodit v nekotoryh sluchajah, v chastnosti, kogda v odnih i teh zhe avtoradiograficheskih obrazcah nabljudajutsja vazhnye variacii plotnosti zeren. Soobshhaetsja o pervyh rezul'tatah popytki regulirovat' plotnost' zerna posle projavlenija i zakreplenija fotograficheskogo materiala putem korrodirovanija obrabotannoj jemul'sii s pomoshh'ju razbavlennyh rastvorov tripsina. Izmenjaja koncentracii i temperaturu, mozhno regulirovat' po zhelaniju skorost' processa korrozii, i takim obrazom rastvor tripsina dejstvuet v kachestve ul'tramikrotoma, udaljaja tonchajshie sloi fotograficheskoj jemul'sii. Bolee togo, jetot process mozhno nabljudat' pod mikroskopom s pomosh'ju podhodjashej kameoy. Privodjatsja rezul'taty, kotorye govorjat o tom, chto s pomoshh'ju jetogo metoda mozhno sostavit' priblizitel'noe predstavlenie o vvedenii so vremenem radioizotopa v nabljudaemuju biologicheskuju strukturu. (author)

  3. Total Counting and Spectroscopy in the Assessment of Alpha Radioactivity in Human Tissues; Determination de la Radioactivite Alpha des Tissus Humains par Dosage de l'Activite Globale et Spectroscopie; Obshchee izmerenie i spektroskopiya pri opredelenii al'fa-radioaktivnosti tkanej cheloveka; Evaluacion de la Actividad Alfa en los Tejidos Humanos por Recuento Global y Espectroscopia

    Energy Technology Data Exchange (ETDEWEB)

    Mayneord, W. V.; Hill, C. R. [Physics Department, Institute of Cancer Research, Royal Cancer Hospital, Clifton Avenue, Belmont, Surrey (United Kingdom)

    1964-10-15

    atmosfera y se citan ejemplos de los resultados de las mediciones de aire ligeramente contaminado por esa sustancia. Se describen asimismo procedimientos de medicion del {sup 239}Pu en tejidos humanos normales y se exponen algunos resultados. Se estudia la contribucion aportada por el {sup 210}Po a la dosis de irradiacion natural proveniente del medio ambiente en el esqueleto y en los organos reproductores del hombre. Se demuestra que esa aportacion puede constituir una fraccion significativa de la dosis total recibida. (author) [Russian] Daetsja kratkij obzor programmy po izmereniju al'fa- radioaktivnosti. Vypolnenie programmy, kotoroe pervonachal'no osnovyvalos' na ispol'zovanii prostyh i chuvstvitel'nyh metodov podscheta s pomoshh'ju tonkih cink-kadmij-sul'fidnyh jekranov teper' vkljuchaet ispol'zovanie metoda al'fa-spektroskopii, razrabotannogo dlja bol'shogo kolichestva istochnikov s nizkoj specificheskoj aktivnost'ju. S pomoshh'ju jetih metodov mozhno izmerjat' urovni specificheskoj aktivnosti vplot' do 10{sup -13} kjuri/g i v nekotoryh sluchajah poluchat' razreshenie jenergii porjadka 40 kjev narjadu s nezavisimoj identifikaciej, osnovannoj na izmerenii perioda poluraspada. Daetsja opisanie dvuh al'fa-spektrometrov, ispol'zovannyh pri izmerenii bol'shogo kolichestva obrazcov, vzjatyh u ljudej, i materialov okruzhajushhej sredy. Osoboe vnimanie udeljalos' izucheniju Po{sup 210} , kotoryj, kak izvestno, prisutstvuet v rjade pishhevyh produktov i tkanjah chelovecheskogo organizma. Opisany metody issledovanija Pu{sup 239} v atmosfere i privedeny primery rezul'tatov izmerenija zagrjaznenija vozduha malymi kolichestvami jetogo materiala. Opisany metody izmerenija Pu{sup 239} v normal'nyh tkanjah u cheloveka i privedeny nekotorye rezul'taty. Obsuzhdaetsja rol' Ro{sup 210} v povyshenii urovnja estestvennogo fonovogo obluchenija kostej i reproduktivnyh organov cheloveka. Pokazano, chto jeta dolja mozhet sostavljat' znachitel'nuju chast' obshej poluchennoj dozy. (author)

  4. Use of Neutron Irradiations in the Brookhaven Mutations Programme; Irradiation Neutronique dans le Cadre du Programme de Mutations Radioinduites de Brookhaven; Primenenie nejtronnogo izlucheniya v brukkhejvenskoj programme po ispol'zovaniyu mutatsij; La Irradiacion Neutronica en el Marco del Programa de Mutaciones Radioinducidas de Brookhaven

    Energy Technology Data Exchange (ETDEWEB)

    Miksche, J. P.; Shapiro, S. [Biology Department, Brookhaven National Laboratory, Upton, NY (United States)

    1964-03-15

    colaboracion con expertos de Australia, Belgica, Costa Rica, Chile, Dinamarca, Ecuador, Formosa, Grecia, Guatemala, India, Irlanda, Italia, japon, Kenia, Mexico, Paises Bajos, Pakistan, Peru, Filipinas, Rumania, Sudafrica, Tailandia, Venezuela, Alemania Occidental y Yugoeslavia. Los autores presentaran una resefla de los proyectos precitados, deteniendose ante todo en el uso de los neutrones para inducir mutaciones. EBR, por ejemplo, la capacidad de restablecimiento y la manifestacion del efecto oxigeno, principalmente para dosis correspondientes a valores reducidos de la TLE. Si bien esta interpretacion debe considerarse provisional, la distribucion de la dosis en funcion de la TLE proporciona una base para la realizacion de nuevos experimentos sobre la relacion existente entre la EBR y la TLE. (author) [Russian] Programma sotrudnichestva po ispol'zovaniju radiomutacij byla razrabotana v Brukhejvenskoj nacional'noj laboratorii primerno desjat' let nazad, chtoby predostavit' vozmozhnost' rastenievodam i agronomam primenjat' metody obluchenija po programme uluchshenija sortov rastenija. V kachestve ustanovki dlja obluchenija po programme ispol'zovalis' teplovaja kolonna v Brukhejvenskom grafitovom jeksperimental'nom reaktore, rentgenovskij apparat (pikovoe naprjazhenie 250 kv) biologicheskogo otdela jadernoj tehniki, gamma-istochnik moshhnost'ju 12 kjuri v teplicah i istochnik Co{sup 60}, raspolozhennyj v pole ploshhad'ju 13 akrov. V jetoj programme sotrudnichestva na dolju Brukhejvenskoj laboratorii prihoditsja razrabotka oborudovanija metodov i teoreticheskih polozhenij, v to vremja kak rastitel'nyj material i semena predostavljajutsja jekspertami po sel'skomu hozjajstvu, o t vetstvennymi za vyrashhivanie obluchennogo materiala i otbor mutacij. Bo le e 150 uchenyh iz 45 shtatov i Pujerto-Riko uchastvujut v vypolnenii programmy. Nachato takzhe vypolnenie proektov s Avstraliej, Bel'giej, Chili, Ko sta'Rika, Daniej, Jekvadorom, Tajvanem, Greciej, G vatem a loj, Indiej

  5. X-Ray Equipment for Food Irradiation; Appareil a Rayons X pour Lirradiation des Denrees Alimentaires; Rentgenovskoe oborudovanie dlya oblucheniya pishchevykh produktov; Equipo de Rayos X para Irradiacion de Alimentos

    Energy Technology Data Exchange (ETDEWEB)

    Rajewsky, B. [Max Planck Institut fuer Biophysik, Frankfurt A. M., Federal Republic of Germany (Germany)

    1966-11-15

    con una intensidad de 2 A y una tension de 100 kV como maximo. La.dosis de irradiacion asciende a 10{sup 7} R/min. Utilizando una cinta transportadora continua ios tubos permiten irradiar una gran cantidad de material. Se describe el correspondiente equipo industrial realizado hasta la fecha. (author) [Russian] Neobhodimost' razrabotki oborudovanija s ochen' vysokim vyhodom rentgenovskih luchej dlja issledovanij razlichnyh problem radiacionnoj biofiziki i radiacionnoj biologii stala ochevidnoj uzhe v nachale sorokovyh godov. Jeto oborudovanie pozvolilo poluchat' bolee vysokuju dozu, chem mogli dat' sushhestvovavshie v to vremja tehnicheskie konstrukcii. Takoe oborudovanie bylo razrabotano v 1950- 1953 godah avtorom i ego kollegami v Institute biofiziki Maksa Planka i s togo vremeni ispol'zovalos' dlja nauchnyh issledovanij. Pozdnee stalo jasno, chto jeti rentgenovskie mashiny ochen' podhodjat takzhe dlja celej sterilizacii i dezinfekcii medikamentov, produktov pitanija i drugih materialov. V Institute biofiziki Maksa Planka ispol'zujutsja tri vida takogo oborudovanija. Posle sozdanija rentgenovskogo oborudovanija AEG na 120 kv i 500 ma promyshlennost' vosprinjala jeti idei i v nastojashhee vremja postepenno pretvorjaet ih v zhizn'. Oborudovanie, sozdannoe avtorom i ego kollegami, imeet tri razlichnyh vida rentgenovskih trubok, kotorye mozhno soedinjat' s transformatorom vysokogo naprjazhenija 240 kv/a. Cherez jeti trubki nepreryvnr ili v techenie korotkogo vremeni propuskaetsja tok v 2 a pri naprjazhenii do 100 kv. Doza radiacii sostavljaet do 10{sup 7} rentgen/min. Vidy trubok pozvoljajut nepreryvno obluchat' bol'shie kolichestva materiala. Daetsja opisanie sootvetstvujushhego promyshlennogo oborudovanija, sozdannogo do sih por. (author)

  6. Radioactive preparation of defects in solids; Creation de defauts dans les solides au moyen de radioisotopes; Ispol'zovanie radioaktivnosti dlya obrazovaniya defektov v tverdykh telakh; Creacion de deiectos en los solidos mediante radioisotopos

    Energy Technology Data Exchange (ETDEWEB)

    Lambe, J [Physics Department, Ford Motor Company, Scientific Laboratory, Dearborn, MI (United States)

    1962-01-15

    zaklyuchaetsya prosto v izgotovlenii po vozmozhnosti chistogo materiala, i vvedenii v nego kakikh libo postoronnikh radioaktivnykh atomov. Pri raspade ehtikh atomov dochernie produkty obrazuyut znachitel'noe kolichestvo defektov. V kachestve prostogo sposoba proverki osushchestvimosti takogo metoda on byl ispol'zovan dlya zakhvata atomov tritiya v kristall tverdogo molekulyarnogo tritiya. EHti opyty pokazyvayut, chto nastoyashchij metod osushchestvim i dolzhen najti sebe osoboe shirokoe primenenie v poluchenii svobodnykh radikalov v organicheskikh veshchestvakh, imeyushchikh dostatochnuyu stojkost' protiv radiatsii. (author)

  7. Mass dependence of intermetallic diffusion; Influence de la masse sur la diffusion intermetallique; Zavisimost' massy intermetallicheskoj diffuzii; Influencia de la masa sobre la difusion entre metales

    Energy Technology Data Exchange (ETDEWEB)

    Lazarus, D [Department of Physics, University of Illinois, Urbana, IL (United States)

    1962-01-15

    disolvente. El autor analiza tambien la influencia ejercida por la temperatura sobre ese efecto. (author) [Russian] Byli provedeny ehksperimenty dlya opredeleniya spetsificheskogo ehffekta izotopnykh mass na stepen' intermetallicheskoj diffuzii dlya togo, chtoby proverit' primenenie teorii ob{sup e}ma absolyutnoj reaktsii k protsessu diffuzii, a takzhe vychisleniya Bardina i KHerringa v otnoshenii korrelyatsii mezhdu izotopnym indikatorom i atomnymi perekhodami v rastvoritele. Primenyayutsya metody tochnykh sechenij s ispol'zovaniem izotopnykh indikatorov zheleza-55 i zheleza-59 v chistykh serebryanykh i mednykh odnokristallicheskikh obraztsakh. Dlya izmereniya nebol'shoj zavisimosti massy pri provedenii opyta trebuetsya bol'shaya tochnost'. Poskol'ku oba izotopa zheleza imeyut sovershenno razlichnye skhemy raspada, to tochnoe differentsirovannoe izmerenie aktivnosti mozhet byt' osushchestvleno s pomoshch'yu poglotitelej iz zolota i berilliya posle radiokhimicheskogo otdeleniya izotopnykh indikatorov ot osnovnogo materiala. Rezul'taty pokazyvayut, chto otnositel'naya skorost' diffuzii dvukh dannykh izotopov yavlyaetsya znachitel'no men'shej po sravneniyu s obychno ozhidaemoj skorost'yu blagodarya ili smeshcheniyu ot svoego polozheniya ravnovesiya vo vremya perekhodov v ehlementarnoj diffuzii ili sil'noj korrelyatsii mezhdu atomnymi perekhodami rastvoryaemogo veshchestva i rastvoritelya. Takzhe rassmatrivaetsya zavisimost' ehffekta ot temperatury. (author)

  8. A Contribution to the Study of the Oxidation of Uranium Monocarbide in Carbonic Anhydride at High Temperatures; Contribution a l'etude de l'oxydation du monocarbure d'uranium dans l'anhydride carbonique aux temperatures elevees; Vklad v izuchenie voprosa okisleniya monokarbida urana v ugol'nom angidride pri povyshennykh temperaturakh; Contribucion al estudio de la oxidacion del monocarburo de uranio en anhidrido carbonico a temperaturas elevadas

    Energy Technology Data Exchange (ETDEWEB)

    Desrues, R; Paidassi, J.; Darras, R. [Centre d' Etudes Nucleaires, Saclay (France)

    1963-11-15

    monocarburo, sea que provengan del uranio o bien del dicarburo, disminuye la resistencia de este compuesto a la oxidacion; ello puede atribuirse sobre todo al hecho de que aquellas sufren una oxidacion muy seria, especialmente a raiz de las tensiones mecanicas que causa. 3. En todos los casos, el proceso de oxidacion puede caracterizarse por una energia de activacion igual a 29 000 cal/M, valor muy proximo al correspondiente a la oxidacion del uranio metalico en el mismo gas y a la difusion del oxigeno en el oxido de uranio (UO{sub 2}) que se forma. (author) [Russian] Obraztsy monokarbida urana, poluchennogo dvumya razlichnymi metodami, i obraztsy ker- meta sostava 96,7 ves% U-3,3 ves% S podvergalis' dejstviyu ugol'nogo angidrida, tshchatel'no ochishchennogo ot kisloroda i vodyanykh parov, v intervalakh 350 - 600 deg. C, i nablyudalos' ikh okislenie odnovremenno mikrograficheskim i gravimetricheskim sposobami pri pomoshchi termovesov Ehjro. Bylo otmecheno sleduyushchee: 1) Krivye vyrazhayut uvelichenie vesa kak funktsiyu vremeni i vnachale nosyat yarko vyrazhennyj linejnyj kharakter, zatem bystro vozrastayut, chto ob{sup y}asnyaetsya, v osnovnom,progressivnym razlozheniem obraztsov. Vprochem, poluchennye dannye uvelicheniya vesa yavlyayutsya bolee nizkimi chem te, kotorye byli opublikovany do nastoyashchego vremeni, chto sleduet, ochevidno, pripisat' bolee vysokoj chistote upotreblennogo ugol'nogo angitrida i ochen' neznachitel'noj poristosti ispol'zovannogo monokarbida urana. 2) Nalichie vklyuchenij v monokarbid, kotorye sootvetstvuyut uranu ili dikarbidu, umen'shaet stojkost' ehtogo materiala k okisleniyu, chto sleduet pripisat', glavnym obrazom,katastroficheskomu okisleniyu samikh vklyuchenij iz-za mekhanicheskikh svyazej. 3) Vo vsekh sluchayakh protsess okisleniya mozhet byt' okharakterizovan ehnergiej aktivatsii, ravnoj 29 000 kal/mol', velichinoj, ochen' blizkoj k toj, kotoraya sootvetstvuet okisleniyu metallicheskogo urana v tom zhe gaze i diffuzii kisloroda v okisi

  9. Dispersion-Type Absorbing Materials for the Control Organs of Thermal Reactors; Absorbants du Type a Dispersion pour les Organes de Commande des Reacteurs a Neutrons Thermiques; Pogloshchayushchie materialy dispersionnogo tipa dlya organov regulirovaniya teplovykh reaktorov; Absorbentes de Tipo Dispersion para los Organos de Mando de los Reactores Termicos

    Energy Technology Data Exchange (ETDEWEB)

    Nosov, V. I.; Ponomarjov-Stepnoj, H. H.; Portnoj, K. I.; Savel' ev, E. G.

    1964-06-15

    'nyh jelementov (gadolinija, samarija, evropija it d.). Rassmatrivajutsja voprosy izmenenija pogloshhajushhej sposobnosti ot sostava materiala, mehanicheskie i teplofizicheskie svojstva pogloshhajushhih materialov v zavisimosti ot koncentracii vvodimogo v splav poglotitelja i, nakonec, rezul'taty izuchenija vlijanija obluchenija na svojstva ukazannyh materialov. Pokazano, chto pogloshhajushhie splavy s okislami redkozemel'nyh jelementov, dispergirovannymi v metallicheskuju matricu, obladajut znachitel'noj pogloshhajushhej sposobnost'ju pri sravnitel'no nebol'shom soderzhanii poglotitelja v splave - (5 - 10). Splavy tipa nimonik s dobavkami okislov redkozemel'nyh jelementov imejut sravnitel'no vysokie znachenija prochnostnyh i teplofizicheskih harakteristik (o{sub B}, E, {lambda}) pri povyshennyh temperaturah v oblasti koncentracij poglotitelja Tilde-Operator do (10% Dispersionnye materialy podobnogo tipa obladajut udovletvoritel'noj radiacionnoj stojkost'ju v pole obluchenija ( Tilde-Operator 3 x 10{sup 20} n/cm{sup 2}) v uslovijah vysokih temperatur. (author)

  10. New processing techniques for radioisotopes at Oak Ridge National Laboratory; Production de radioisotopes: nouvelles techniques employees au Laboratoire national d'Oak Ridge; Novye tekhnologicheskie metody polucheniya radioizotopov v Okridzhskoj natsional'noj laboratorii; Nuevos metodos de preparacion de radioisotopos aplicados en el Oak Ridge National Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Butler, T A; Lamb, E; Rupp, A F [Oak Ridge National Laboratory, Oak Ridge, TN (United States)

    1962-01-15

    vozmozhnost' otdeleniya i ochistki strontsiya-90 ot obshchej massy zagryaznitelej putem nepreryvnogo promyvaniya tonkim ehkstragiruyushchim sloem rastvoritelya. Udalos' dostich' proizvodstva 98-protsentnogo strontsiya iz iskhodnogo materiala, soderzhavshego 95 % inertnogo kal'tsievogo zagryaznitelya. Dalee strontsij-90 pererabatyvalsya dlya polucheniya keramicheskikh ehlementov titanata strontsiya. (author)

  11. Problems Arising from Disposal of Low-Activity Radioactive Waste in the Coastal Waters of the Netherlands; Problemes Poses par l'Evacuation des dechets de Faible Radioactivite dans les Eaux Cotieres des Pays-Bas; 041f 0420 041e 0414 ; Problemas que Plantea la Evacuacion de Desechos Radiactivos de Baja Actividad en las Aguas Costeras de los Paises Bajos

    Energy Technology Data Exchange (ETDEWEB)

    Korringa, P. [Netherlands Institute for Fishery Investigations, Ijmuiden (Netherlands)

    1960-07-01

    acumulacion puede alcanzar niveles alarmantes. Dado que los principales productos de pesqueria que se obtienen en las proximidades de la conduccion de descarga proyectada para el centro holandes de investigacion sobre reactores son los camarones, lenguados platijas y mejillones, habria que evitar que se produjese una acumulacion apreciable de desechos radiactivos en estos animales. La peculiar situacion internacional del mercado pesquero de los Paises Bajos exige particular cuidado, y la migracion de peces y camarones impide el evitar que exista una zona contaminada. (author) [Russian] Radioaktivnye othody s nizkoj aktivnost'ju, otvedennye v pribrezhnye vody, budut vkljuchat'sja v morskoj ''pishhevoj obmen'' dvumja sovershenno razlichnymi putjami. 1. Adsorbcija na poverhnosti planktonovyh organizmov i adsorbcija na chasticy ila. V poslednem sluchae ryby i drugie sushhestva mogut zaglotit' zagrjaznennye chastichki so svoej obychnoj pishhej. V tom sluchae, kogda rassmatrivaemye jelementy ne igrajut pervostepennoj biologicheskoj roli dlja dannyh organizmov, akkumuljacija ne budet vozrastat' v geometricheskoj progressij. Bol'shaja chast' radioaktivnogo materiala, proglochennogo vmeste s chasticami ila, pozdnee pokinet organizm. 2. Akkumuljacija cherez aktivnoe usvoenie jelementov, sobiraemyh v sostojanii rastvora organizmami, kotorye nosjat na sebe obolochki. Med', cink, marganec, kobal't i t.p. jelementy akkumulirujutsja v znachitel'noj stepeni sushhestvami, kotorye sozdajut sebe pokrytie, takimi kak moljuski, i sohranjajutsja v soedinitel'nyh tkanjah. Esli chast' takih jelementov javljaetsja radioaktivnoj, akkumuljacija mozhet dostignut' opasnyh predelov. Krevetki, morskie jazyki, kambala i dvustvorchatye rakoviny, javljajutsja osnovnym rybnym produktom v rajone, prilegajushhem k planiruemomu truboprovodu Datskogo centra po issledovaniju reaktorov, i sleduet predotvratit' znachitel'nuju akkumuljaciju radioaktivnyh othodov v jetih organizmah. Osoboe mezhdunarodnoe polozhenie

  12. Properties of silicium n-i-p junctions - application to the detection of relativist particles; Propriete des jonctions nip de silicium - Application a la detection des particules relativistes; Svojstva perekhoda p-i-n v kremnii - primenenie k obnaruzheniyu relyativistskikh chastits; Propiedades de estructuras nip de silicio - Aplicacion a la deteccion de particulas relativistas

    Energy Technology Data Exchange (ETDEWEB)

    Koch, L; Messier, J; Valin, J [Centre d' Etudes Nucleaires de Saclay (France)

    1962-04-15

    . (author) [Spanish] Los autores describen la experiencia adquirida en el CENS, en lo que se refiere a la deteccion de particulas nucleares por medio de semiconductores. Han estudiado especialmente cierto tipo de detector, de estructura pin. Suponiendo que se trabaje con materiales de igual pureza inicial, este dispositivo presenta, con respecto a los aparatos de estructura corriente pn o npp{sup +}, la ventaja de poseer un mayor volumen sensible. En efecto: a) a igual diferencia de potencial aplicada al cristal, el espesor total de las barreras es mayor; b) a igualdad de la corriente inversa, la maxima diferencia de potencial que admiten es mayor; c) siendo iguales todas las demas condiciones, su capacidad por unidad de superficie es menor y la maxima superficie admisible es, pues, mas elevada. Los autores describen detalladamente ciertos procedimientos que permiten obtener estructuras pin en el silicio, con un espesor de zona intermedia que alcanza a 1 mm. Finalmente, describen algunas aplicaciones de estos detectores, tales como la espectroscopia {alpha} y {gamma}, y la medida de dE/dX en el caso de las particulas relativistas. (author) [Russian] V dannoj rabote govoritsya ob opyte, provedennom v TSentre yadernykh issledovanij v Sakle, v oblasti obnaruzheniya yadernykh chastits s pomoshch'yu poluprovodnikov. V chastnosti, izuchalsya tip detektora s perekhodom p-i-n. Po sravneniyu s obychnymi perekhodami p-n ili npp{sup +} i pri uslovii ravnoj chistoty iskhodnogo materiala, ehtot perekhod imeet preimushchestvo, zaklyuchayushcheesya v bolee vysokoj chuvstvitel'nosti ; dejstvitel'no: 1) pri ravnoj raznosti potentsialov, prilozhennoj k kristallu, samym vazhnym yavlyaetsya obshchaya tolshchina bar'erov; 2) pri ravnom obratnom toke maksimal'naya raznost' potentsialov, kotoruyu oni vyderzhivayut, bolee vysoka; 3) pri drugikh ravnykh velichinakh ikh emkost' na edinitsu poverkhnosti nizhe, a maksimal'no dopustimaya poverkhnost' vyshe. V rabote podrobno opisyvayutsya nekotorye

  13. Measurement of {beta} Emitters by the Radiated Charge; Mesure des Emetteurs {beta} par la Charge Rayonnee. Mesure de l'activite des emetteurs {beta} a partir de la charge rayonnee; Izmerenie aktivnosti izluchatelya {beta}-chaetits na osnove izluchaemogo zaryada; Medicion de la actividad de los emisores {beta} a partir de la carga irradiada

    Energy Technology Data Exchange (ETDEWEB)

    Engelmann, J J [Centre d' Etudes Nucleaires de Saclay (France)

    1960-06-15

    choix. Les theories sur la retrodiffusion permettent d'expliquer ces resultats. (author) [Spanish] El metodo se basa en el principio recientemente descrito por Failla y sus colaboradores: En un recinto en que se ha hecho el vacio se disponen paralelamente y a poca distancia entre si dos electrodos planos del mismo material. Sobre uno de ellos se deposita la fuente que se ha de medir. La retrodispersion en el electrodo portador de la fuente queda compensada por la reflexion en el otro electrodo. Un campo magnetico o electrico permite eliminar el efecto de los electrones secundarios de escasa energia. Cuando la deflexion se efectua por medios magneticos, el dispositivo experimental se completa por una camara de extrapolacion y cuando la deflexion es. electrica, por una camara de rejilla muy fina. En el caso del Sr{sup 90}-Y{sup 90} y del P{sup 32}, los resultados obtenidos concuerdan satisfactoriamente con los de las mediciones efectuadas con ayuda de un contador 4 {pi} (precision superior a {+-} 2%). En el caso del S{sup 35}, las eperiencias realizadas ponen de manifiesto la influencia ejercida por el numero atomico del soporte de la fuente, lo cual obliga a utilizar determinados soportes. Los resultados obtenidos pueden explicarse con ayuda de las teorias sobre la retrodispersion. (author) [Russian] Printsip metoda opisan nedavno g-nom Pehlla i ego sotrudnikami: Dva takikh ehlektroda, sdelannye iz odnogo materiala i raspolozhenny e parallel'no i blizko drug ot druga, pomeshchayutsya v vakuumnyj sosud. Na odnom iz ehlektrodov pomeshchayut podlezhashchij izmereniyu istochnik. Obratnaya diffuziya na ehlektrode, na kotorom nakhoditsya istochnik, kompensiruets ya otrazheniem na drugom ehlektrode. Magnitnoe ili ehlektricheskoe pole pozvolyaet ustranit' dejstvie vtorostepenny kh ehlektronov slaboj moshchnosti. EHksperimental'ny j mekhanizm sostoit, v sluchae magnitnogo otkloneniya, iz ehkstrapolyatsionno j kamery, a v sluchae ehlektricheskogo otkloneniya, iz kamery s ochen

  14. Interim measure conceptual design for remediation at the former CCC/USDA grain storage facility at Centralia, Kansas : pilot test and remedy implementation.

    Energy Technology Data Exchange (ETDEWEB)

    LaFreniere, L. M.; Environmental Science Division

    2007-11-09

    carbon tetrachloride in groundwater and soil, the CCC/USDA recommends initial short-term, field-scale pilot testing of a remedial approach that employs in situ chemical reduction (ISCR), in the form of a commercially available material marketed by Adventus Americas, Inc., Freeport, Illinois (http://www.adventusgroup.com). If the pilot test is successful, it will be followed by a request for KDHE authorization of full implementation of the ISCR approach. In the recommended ISCR approach, the Adventus EHC{reg_sign} material--a proprietary mixture of food-grade organic carbon and zero-valent iron--is introduced into the subsurface, where the components are released slowly into the formation. The compounds create highly reducing conditions in the saturated zone and the overlying vadose zone. These conditions foster chemical and biological reductive dechlorination of carbon tetrachloride. The anticipated effective lifetime of the EHC compounds following injection is 1-5 yr. Although ISCR is a relatively innovative remedial approach, the EHC technology has been demonstrated to be effective in the treatment of carbon tetrachloride contamination in groundwater and has been employed at a carbon tetrachloride contamination site elsewhere in Kansas (Cargill Flour Mill and Elevator, Wellington, Kansas; KDHE Project Code C209670158), with the approval of the KDHE. At Centralia, the CCC/USDA recommends use of the ISCR approach initially in a short-term pilot test addressing the elevated carbon tetrachloride levels identified in one of three persistently highly contaminated areas ('hot-spot areas') in the groundwater plume. In this test, a three-dimensional grid pattern of direct-push injection points will be used to distribute the EHC material (in slurry or aqueous form) throughout the volume of the contaminated aquifer and (in selected locations) the vadose zone in the selected hot-spot area. Injection of the EHC material will be conducted by a licensed contractor, under

  15. The use of Kr{sup 85} for the measurement of leaks in hermetically sealed components; Emploi du krypton-85 pour la detection des fuites dans les pieces hermetiquement scellees; Opredelenie utechki germeticheski izolirovannykh komponentov pri pomoshchi Kr''8''5; Empleo del {sup 85}Kr para la deteccion de fugas en piezas hermeticamente selladas

    Energy Technology Data Exchange (ETDEWEB)

    Berry, P F; Cameron, J F [Wantage Research Laboratory (A. E. R. E.), Wantage, Berks. (United Kingdom); Wilson, E J [Radiochemical Centre, Amersham, Bucks. (United Kingdom)

    1962-01-15

    los poros del material constituye el principal factor que limita la sensibilidad del primer metodo; los autores tratan de la gravedad de este efecto al estudiar la aplicacion de este metodo a la deteccion de fugas en cartuchos para transistores. La introduccion de gas radiactivo en la pieza antes de cerrarla presenta la ventaja de que es posible controlar el contenido de la pieza durante un largo periodo de tiempo. Con esto se elimina la posibilidad de que el orificio por el que se produce la fuga se obture pasajeramente en el momento en que se aplican la presion o el vacio, obteniendose ademas un valor integrado de la magnitud de la fuga, esto es, un dato de mayor utilidad. (author) [Russian] Radioaktivnye gazy obespechivayut metod opredeleniya utechki germeticheski izolirovannykh komponentov, kotoryj v osobykh sluchayakh mozhet byt' bolee chuvstvitel'nym na neskol'ko poryadkov moshchnosti, nezheli obychnye metody opredeleniya utechki. Dlya ehtoj tseli v nastoyashchem doklade privoditsya opisanie ispol'zovaniya Kg{sup 85}. Gaz mozhno ispol'zovat' dvumya putyami. V pervom sluchae komponent pogruzhaetsya v gaz pri kontroliruemykh usloviyakh davleniya i vremeni, a ego prosochivsheesya kolichestvo pod davleniem izmeryaetsya posleduyushchim kontrolirovaniem radiatsii, pronikshej cherez stenki komponenta. Vo vtorom sluchae nekotoroe kolichestvo aktivnogo gaza vvoditsya do izolyatsii, a posleduyushchaya poterya aktivnosti yavlyaetsya meroj skorosti utechki. Vybor metoda zavisit ot razmerov komponenta i ego naznacheniya. Osnovnym ogranicheniem chuvstvitel'nosti v pervom metode yavlyaetsya zarazhenie poverkhnosti, blagodarya proniknoveniyu gaza v pory materiala komponenta; razmery ehtogo proniknoveniya obsuzhdayutsya v primenenii metoda po opredeleniyu utechki v obolochkakh poluprovodnikovykh triodov. Predvaritel'noe zapolnenie komponenta aktivnym gazom do germetizatsii imeet preimushchestvo v tom, chto dlitel'nyj kontrol' nad soderzhaniem komponenta vozmozhen. EHto

  16. Thermal Shock Tests on UO{sub 2} Small Spheres; Essais de choc thermique sur des elements spheriques de UO{sub 2}; Ispytaniya nebol'shikh sharikov iz UO{sub 2} teplovykh udarom; Ensayo de pequenas esferas de UO{sub 2} por choque.termico

    Energy Technology Data Exchange (ETDEWEB)

    Perona, G.; Brutto, E.; Galbusera, U.; Palladino, G.; Sesini, R. [Centro Informazioni Studi Esperienze, Milan (Italy)

    1963-11-15

    exponen los resultados obtenidos. La aplicacion de este metodo presenta, al parecer, considerable interes, sobre todo en lo que concierne a las investigaciones encaminadas a mejorar las caracteristicas de las esferas de UO{sub 2} por medio de aditivos. En e fecto, permite verificar el efecto global con una sola medicion. (author) [Russian] Ispol'zuya malye pariki iz UO{sub 2} v kachestve yadernogo topliva v reaktore, gde oni nakhodyatsya v soprikosnovenii s teplonositelem, neobkhodimo znat' maksimal'nuyu pri rabochem rezhime reaktora velichinu termicheskikh napryazhenij, kotorye mogut vyderzhivat' bez povrezhdeniya ehti shariki. Esli izvestny fizicheskie svojstva materiala, to mozhno rasschitat' ehti napryazheniya pri rabochem rezhime. Odnako vvidu mnogochislennosti podlezhashchikh uchetu faktorov i neizbezhnoj doli neopredelennosti kazhdogo iz nikh predstavlyaetsya predpochtitel'nym provesti neposredstvennye ispytaniya ehtikh sharikov, podvergnuv ikh tem zhe napryazheniyam, kakie oni ispytyvayut v reaktore. V nastoyashchej rabote byl izuchen metod teplovogo udara v primenenii k malym sharikam i ukazyvayutsya usloviya, pri kotorykh ehtot metod pozvolyaet proizvesti napryazheniya, neposredstvenno sravnimye s temi, kotorye sushchestvuyut v reaktore. V sluchae malykh sharikov zatrudnenie zaklyuchaetsya v osushchestvlenii okhlazhdeniya, pozvolyayushchego dostigat' ochen' bol'shikh znachenij koehffitsienta poverkhnostnoj teploperedachi. Opisyvayutsya ehksperimental'nye metody i soobshchayutsya poluchennye rezul'taty. Primenenie ehtogo' metoda, po-vidimomu., predstavlyaet bol'shoj interes, v osobennosti v oblasti tekhnologicheskikh izyskanij s tsel'yu uluchsheniya svojstv malykh sharikov iz UO{sub 2} putem vklyucheniya dobavochnykh komponentov. Fakticheski,ehtot metod daet vozmozhnost' pri pomoshchi odnogo tol'ko izmereniya kontrolirovat' izuchaemoe vozdejstvie. (author)

  17. Tyrosine Metabolism in the Blowfly, Calliphora Erythrocephala; Metabolisme de la tyrosine dans la Calliphora Erythrocephala; Metabolizm tirozina u myasnoj mukhi, Calliphora Erythrocephala; Metabolismo de la tirosina en la mosca Calliphora Erythrocephala

    Energy Technology Data Exchange (ETDEWEB)

    Sekeris, C. E. [Physiological Chemistry Institute, University of Munich, Munich (Germany)

    1963-09-15

    estadio las larvas catabolizan tirosina por transaminacion, dando acido p-hidroxifenilpinivico, y por reduccion, dando los acidos p-hidroxifenillactico y p-hidroxifenil propionico. Esta transicion metabolica desde la transaminacion a la hidroxilacion y descarboxilacion se debe a la hormona de la glandula protoracica (ecdyson) y se puede inhibir ligando o destruyendo la glandula anular. Si se inyecta ecdyson en los animales ligados se produce al cabo de 10 a 14 h una activacion de la dopadecarboxilasa, debida probablemente a la biosintesis de proteinas enzimaticas. La accion de la hormona sobre el mecanismo de biosintesis no es directa sino indirecta, dejandose sentir sus primeros efectos sobre los cromosomas (fenomeno de turgencia). La hipotesis de que se partio es que la hormona que actua sobre las sustancias geneticas y que sufre la accion de estas estimula la sintesis de un ARN especifico (vehiculo) que se traslada al citoplasma y produce proteinas enzimaticas. (author) [Russian] Sklerotizatsiya, t.e. prevrashchenie myagkoj beloj kutikuly lichinki v zatverdevshij temnyj puparij, proiskhodit blagodarya vzaimodejstviyu ortokhinonov s belkami kutikuly. S pomoshch'yu mechennykh izotopami aminokislot bylo pokazano, chto N-atsetildopamin yavlyaetsya blizhajshim predshestvennikom sklerotiziruitsikh khinonov u Calliphora erythrocephala. Promezhutochnymi stadiyami v biosinteze N-atsetildopamina yavlyayutsya gidroksilirova- nie tirozina v dopa, dekarboksilirovanie dopa do dopamina i N-atsetilirovanie dopamina do N-atsetildopamina. Ehtot metabolicheskij protsess prevrashcheniya tirozina proiskhodit tol'ko u lichinok na poslednej stadii razvitiya. U lichinok v rannej faze tret'ej stadii proiskhodit katabolizatsiya ti rozina putem pereaminirovaniya v para-oksifenilpirovikogradnuzeh kislotu i vosstanovlenie v paraoksifenilmolochnuyu para-oksifenilpropionovuyu kislotu. Metabolicheskoe smeshchenie ot pereaminirovaniya do gidroksilizatsii i dekarboksilizatsii vyzyvaetsya gormonom

  18. Automatic Sample Changing System for Gamma-Ray Spectrometry; Changeur Automatique d'Echantillons Pourla Spectrometrie Gamma; Avtomaticheskaya sistema dlya smeny obraztsov pri gamma-spektrometrii; Cambiador Automatico de Muestras para Espectroscopia Gamma

    Energy Technology Data Exchange (ETDEWEB)

    Lamson, K. C.; Sesko, W. J.; Nicholson, G. C. [Northeastern Radiological Health Laboratory, Winchester, MA (United States)

    1965-10-15

    ha solicitado una patente, viene funcionando satisfactoriamente desde hace mas de un ano en el Northeastern Radiological Health Laboratory. Su costo total, inclusive la mano de obra, fue inferior a 2000 dolares. (author) [Russian] Obnaruzhenie prirodnyh kolichestv gamma-izluchajushhih radioizotopov v biologicheskoj srede trebuet vysokoj chuvstvitel'nosti schetnoj sistemy. Dlja togo, chtoby poluchit' dostatochno tochnye dannye, trebuetsja mnogo vremeni, ot odnogo do neskol'kih chasov. Naibolee jeffektivnoe ispol'zovanie dorogostojashhego gamma-spektrometricheskogo schetnogo oborudovanija s nizkim fonom trebuet ego nepreryvnoj raboty. Dlja jetogo neobhodimo libo postojannoe prisutstvie personala, libo nalichie polnost'ju avtomatizirovannoj sistemy, vkljuchajushhej smenu obrazcov i registraciju dannyh. Cel'ju nastojashhego doklada javljaetsja opisanie avtomatizirovannoj gamma-spektrometricheskoj schetnoj sistemy, sproektirovannoj, izgotovlennoj i rabotajushhej v radiologicheskoj laboratorii v Uinchestere, shtat Massachusets. Prisposoblenie dlja smeny obrazcov bylo sproektirovano dlja raboty v sochetanii s bol'shim stal'nym jekranirovannym kontejnerom, i dlja jetoj celi mozhno legko primenit' ljuboe imejushheesja v prodazhe prisposoblenie takogo roda s otkryvajushhejsja perednej dvercej. Prisposoblenie oborudovano takim obrazom, chtoby obrabatyvat' razlichnye obrazcy, v tom chisle biologicheskie i medicinskie. Ono sostoit iz vrashhajushhegosja lotka, rasschitannogo na shestnadcat' obrazcov, sistemy periodicheskoj krugovoj podachi dlja ustanovki obrazcov v nuzhnoe polozhenie, mehanicheskoj ruki s jelektromagnitom dlja vvedenija i vyemki obrazcov iz kontejnera i rychaga dlja otkryvanija i zakryvanija dvercy kontejnera. Sistema dlja smeny obrazcov soedinena s mnogokanal'nym analizatorom, kotoryj obespechivaet bezopasnost', preryvaja cikl v sluchae neispravnosti v ljuboj faze. Posle zadannogo vremeni scheta dannye nanosjatsja putem punshirovanija na bumazhnuju lentu i

  19. Ethylene Polymerization by Gamma Irradiation; Polymerisation de l'ethylene par irradiation; Polimerizatsiya ehtilen a pod vliyaniem gamma-izlucheniya; Polimerizacion del etileno por irradiacion gamma

    Energy Technology Data Exchange (ETDEWEB)

    Medvedev, S S; Abkin, A D; Khomikovsky, P M [Fiziko-khimicheskij institut im. Karpova, SSSR, Moscow, Union of Soviet Socialist Republics (Russian Federation)

    1960-07-15

    presion del etileno (50-300 atmosferas), la dosis especifica (20-160 roentgens/segundo) y la temperatura (0-50{sup o}C). La velocidad del proceso, el rendimiento quimico obtenido por radioinduccion y el peso molecular medio de los polimeros aumentan considerablement e con la presion (entre 50 y 200 atmosferas, la velocidad de polimerizacion es proporcional a la cuarta potencia de la concentracion de etileno). La velocidad de polimerizacion depende poco de la dosis especifica, siendo proporcional a la intensidad de irradiacion elevada a la potencia 0,3, en tanto que el rendimiento quimico obtenido por radioinduccion y el peso molecular medio de los polimeros aumentan a medida que la dosis especifica disminuye. La velocidad del proceso y el peso molecular aumentan ligeramente al crecer la temperatura. Los autores estudian las posibles explicaciones de las leyes cineticas observadas. El polietileno obtenido por irradiacion se distingue del polimero producido a presiones elevadas por su mayor densidad y grado de cristalizacion. En lo que se refiere a sus propiedades mecanicas, el polimero de viscosidad intrinseca superior a la unidad (obtenido a presiones comprendidas entre 100 y 200 atmosferas) se asemeja al polietileno producido a presiones elevadas. (author) [Russian] Issledovan protsess radiatsionnoj polimerizatsii ehtilena. S tsel'yu uvelicheniya skorosti initsiirovaniya provedeno izuchenie polimerizatsii ztilena v rastvorakh organicheskikh veshchestv (spirty, atseton, alifaticheskie uglevodorody) i pokazano, chto pri postoyannom davlenii (50 atm) i komnatnoj temperature skorost' protsessa v rastvore v 10-15 raz vyshe, chem v gazovoj faze. Detal'no izuchen protsess polimerizatsii ehtilena pod vliyaniem izlucheniya kobal'ta{sup -60} v gaze v zavisimosti ot davleniya ehtilena (50-300 atm), moshchnosti dozy (20-160 rentg/sek) i temperatury (0-50{sup o}C). Skorost' protsessa, radiatsionno-khimicheskij vykhod i srednij molekulyarnyj ves polimerov rezko vozrastayut s davleniem

  20. Some solvent extraction studies of trivalent metal halides; Quelques etudes sur l'extraction par solvant d'halogenures de metaux trivalents; Izuchenie ehkstraktsii nekotorykh rastvoritelej iz trekhvalentnykh metallicheskikh galoidov; Algunos estudios de la extraccion mediante disolventes de haluros de metales trivalentes

    Energy Technology Data Exchange (ETDEWEB)

    Dietz, Jr, R J; Mendez, J; Irvine, Jr, J W [Department of Chemistry and Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, MA (United States)

    1962-03-15

    'no vysokimi diehlektricheskimi svojstvami. Po kolebaniyam koehffitsienta ehkstraktsii pri razlichnoj kontsentratsii metalla byla poluchena konstanta ionizatsii vspomogatel'nogo ehlektrolita, HCl ili HBr, v nevodnoj faze s ispol'zovaniem metoda, razrabotannogo Poskantserom. Variatsii koehffitsienta ehkstraktsii s kontsentratsiej HX ispol'zovalis' dlya rascheta konstant stabil'nosti dlya slozhnykh obraztsov MX{sub 3} i MX{sub 4}{sup -}. Tak kak oni yavlyayutsya reaktsiyami vodnoj fazy, to ne zavisyat ot ispol'zovannogo organicheskogo rastvoritelya, i poluchena polnaya soglasovannost' dlya In (III)-HCl pri ispol'zovanii dvojnogo ehfira (2-khloroehtil) i nitrobenzola. Popytki provedeniya otsenki obrazovaniya konstant dlya gallievogo khlorida i soedinenij broma okonchilis' neudachej, tak kak slozhnoe obrazovanie proiskhodit v ochen' uzkom diapazone kontsentratsii kisloty. Raschety na osnove rezul'tatov ehkstraktsii fraktsii (GaCl{sub 4}{sup -})/{Sigma} Ga (III) v kachestve funktsii ot kontsentratsii NS1 nakhodyatsya v kolichestvennom sootvetstvii s rezul'tatami, poluchennymi Krausom i Nel'sonom pri izmerenii ionnogo obmena. (author)

  1. Diagnosis and treatment of a local and afterwards generalized plutonium contamination; Diagnostic et traitement d'un cas d'intoxication par le plutonium local d'abord et generalise ensuite; Diagnoz i lechenie mestnogo i posledukshego generalizirovannogo porazheniya plutoniem; Diagnostico y tratamiento de una contaminacion local y luego general por plutonio

    Energy Technology Data Exchange (ETDEWEB)

    Lafuma, J. [Commissariat a l' Energie Atomique, Centre d' Etudes Nucleaires, Fontenay-aux-Roses (France)

    1963-02-15

    'yu DTRA. Posle avarii u postradavshego nemedlenno byli vzyaty dlya analiza i izmereniya aktivnosti krov', mocha i kal. Vposledstvii mocha bralas' ezhednevno. Vzyatie krovi i kala proizvodilos' v kazhdoj faze lecheniya. Rezul'taty izmerenij svidetel'stvuyut o bol'shoj ehffektivnosti DTRA pri vnutrennikh porazheniyakh plutoniem-239. Odnako predstavlyaetsya, chto protsentnoe soderzhanie v krovi plutoniya, kotoryj udalyaetsya pochkami, menyaetsya v zavisimosti ot vremeni. Ehtot protsentnyj pokazatel' vozrastaet, pokazyvaya tem samym, chto plutonij nakhoditsya v krovi v razlichnykh ionnykh i kolloidal'nykh formakh, kotorye udalyayutsya pochkami s razlichnoj skorost'yu. Poehtomu sozdaetsya vpechatlenie, chto aktivnost' mochi ne yavlyaetsya vernym priznakom vnutrennego zagryazneniya. (author)

  2. The Application of Non-Metallic Core Materials in a High-Temperature Reactor Experiment; Utilisation de materes non metalliques dans le coeur d'un reacteur experimental a haute temperature; Ispol'zovanie nemetallicheskikh materialov dlya aktivnoj zony vysokotemperaturnogo opytnogo reaktora; Empleo de materiales no metalicos en el nucleo de un reactor experimental de alta temperatura

    Energy Technology Data Exchange (ETDEWEB)

    Huddle, R. A.U.; Shepherd, L. R. [Organization for Economic Co-Operation and Development, Dragon Project, Atomic Energy Establishment, Winfrith, Dorset (United Kingdom)

    1963-11-15

    comportamiento de estos materiales en condiciones de funcionamiento normales. Se comunican los resultados de las investigaciones sobre irradiacion, asi como de los trabajos efectuados en los circuitos del reactor. El objetivo principal de este programa es el perfeccionamiento de los reactores de elevada temperatura refrigerados por gas para aplicarlos a la generacion de electricidad en condiciones rentables. (author) [Russian] Proekt vysokotemperaturnogo reaktora (DRAGON)sozdan dlya razrabotki tekhnologii vysokotemperaturnykh reaktorov s gazovym okhladitelem; v nem predusmatrivalos' sooruzhenie i ehkspluatatsiya opytnogo reaktora na 20 mgvt (tepl.). Reaktor, sooruzhenie kotorogo budet vskore zakoncheno, predstavlyaet soboj sistemu, okhlazhdaemuyu geliem; temperatura na vykhode iz aktivnoj zony budet dostigat' 750{sup o}C. V nem budet ispol'zovat'sya U-235 v kachestve goryuchego i torij v kachestve vosproizvodyashchego materiala. Kharakternoj osobennost'yu sistemy yavlyaetsya otsutstvie kakogo-libo metalla v aktivnoj zone. Vvidu togo, chto v reaktore dolzhny razvivat'sya ves'ma vysokie temperatury,' a imenno, 1050{sup o}C na poverkhnosti teplovydelyayushchego ehlementa i do 1500{sup o}C v naibolee sil'no nagrevaemykh tochkakh topliva, dlya ego sooruzheniya ispol'zovany ogneupornye nemetallicheskie materialy. Vse veshchestvo aktivnoj zony sosredotocheno v teplovydelyayushchem ehlemente, blagodarya chemu sootnoshenie mezhdu poverkhnost'yu teploperedachi i ob{sup e}mom aktivnoj zony dostigaet bol'shogo znacheniya, i, sledovatel'no, pozvolyaet dostigat' vysokoj srednej plotnosti ehnergii v sravnitel'no kompaktnoj sisteme. Kazhdyj teplovydelyayushchij ehlement sostoit ieh gruppy grafitovykh trubok, zapolnennykh grafitovymi tabletkami, soderzhashchimi rasshcheplyayushcheesya i vosproizvodyashchee veshchestva v vide karbidov. Gelievyj okhladitel' prokhodit po osi. kazhdogo teplovydelyayushchego sterzhnya i vyvoditsya u ego osnovaniya, okhladitel' zatem napravlyaetsya v ochistitel

  3. Theory of Pulsed Neutron Experiments in Highly Heterogeneous Multiplying Media; Theorie des Experiences au Moyen des Neutrons Pulses, dans les Milieux Multiplicateurs Tres Heterogenes; O teorii ehksperimentov s impul'snymi neitronami v geterogennykh razmnozhayushchikh sredakh; Aspectos Teoricos de los Experimentos con Neutrones Pulsados en Medios Multiplicadores Muy Heterogeneos

    Energy Technology Data Exchange (ETDEWEB)

    Corno, S. E. [Instituto di Fisica ' ' A. Volta' ' (Italy); Unversity of Pavia, Pavia (Italy); SNAM, Milan [Italy

    1965-10-15

    como punto singular absorbente y multiplicador del campo neutronico. Como el auto: estudia sobre todo la variacion espacial y temporal del flujo neutronico, utiliza valores relativamente poco precisos por lo que respecta a la variacion de la poblacion neutronica en funcion de la energia. Dentro de los limites de validez de la teorfe de la edad de difusion, la instalacion responde en forma analitica a una excitacion provocada por los neutrones. Cuando se trata de una fuente de modulacion sinusoidal de frecuencia determinada, puede demostrarse facilmente que si el punto singular axial fuese puramente absorbente, las ondas neutronicas que se propagaran a lo largo de la instalacion poseerfan una fase, una longitud de onda y una constante de atenuacion dependiente de las propiedades absorbentes del punto singular. Esto se complica en caso de multiplicacion neutronica. Para este caso general, la solucion presentada en la memoria depende, desde luego, de las propiedades absorbentes y multiplicadoras del punto singular. Esta circunstancia, entre otras, ha inducido a utilizar una instalacion como la que se acaba de describir para ensayar los elementos combustibles de los reactores heterogeneos. (author) [Russian] Issledovalis' vremennaja i prostranstvennaja zavisimosti nejtronnogo potoka na vysoko geterogennoj sborke, kuda inzhektirujutsja impul'snye ili sinusoidno modulirovannye nejtrony. Dlja prostoty rassmatrivaetsja ustrojstvo, sostojashhee iz cilindricheskogo bloka zamedlitelja tjazhelyh nejtronov, po osi kotorogo nahoditsja vytjanutaja oblast' rasshhepljajushhegosja materiala. Predpolagaetsja, chto usiljajushhij istochnik nejtronov razmeshhaetsja na odnoj iz storon cilindra. Razmer rasshhepljajushhejsja oblasti pozvoljaet rassmatrivat' ee kak absorbirujushhuju i razmnozhajushhuju singuljarnuju sostavljajushhuju nejtronnogo polja. Poskol'ku vnimanie koncentriruvalos' glavnym obrazom na prostranstvennom i vremennom izmenenii nejtronnogo potoka, to sdelany dovol'no grubye

  4. Solidification of Radioactive Waste Solutions; Solidification des Effluents Radioactifs; 041e 0422 0412 0415 0420 0416 0414 0415 041d 0418 0415 0420 0410 0414 0418 041e 0410 041a 0422 0418 0412 041d 042b 0425 0421 0411 0420 041e 0421 041d 042b 0425 0420 0410 0421 0422 0412 041e 0420 041e 0412 ; Solidificacion de Efluentes Radiactivos

    Energy Technology Data Exchange (ETDEWEB)

    Brezhneva, N. E.; Golovanov, Ju. N.; Oziraner, S. N.; Eremin, A. A.; Rozanova, V. N.

    1963-02-15

    osadkov gidrookisi zheleza, poluchennyh osazhdeniem iz radioaktivnyh ishodnyh rastvorov. Shema otverzhdenija razrabotana, ishodja iz uslovija umen'shenija do minimuma sbrosnyh sduvochnyh gazov, podlezhashhih ochistke, ot ajerozolej i letuchih radioaktivnyh komponent. V processe raboty ustanovleny optimal'nye uslovija poluchenija himicheski stojkogo stekla, a takzhe pokazana vozmozhnost' snizhenija temperatury plavki stekla var'irovaniem dobavok fljusov. Ustanovleno zametnoe snizhenie himicheskoj stojkosti stekla, podvergshegosja dlitel'nomu hraneniju pri temperature vyshe 300 - 350 Degree-Sign C. Izuchena vymyvaemost' radiocezija iz stekol. Issledovana letuchest' radiocezija i radiorutenija v processe sushki i plavki i pokazano, chto v atmosfere uglekislogo gaza letuchest' rutenija polnost'ju podavljaetsja. Letuchest' radiocezija v zametnyh kolichestvah stanovitsja zametnoj pri temperature vyshe 700 Degree-Sign C i rastet s povysheniem ee. Pokazano, chto radiocezij kondensiruetsja na otvodjashhih trubkah pri temperature nizhe 400 Degree-Sign C i legko smyvaetsja slabym rastvorom azotnoj kisloty i vody. Provedennyj raschet teplovydelenija radioaktivnyh stekol pokazal, chto radius sharovoj otlivki stekla iz vysokoaktivnogo materiala (10 kjuri/g) ne dolzhen prevyshat' 25 sm. Daetsja shema i apparaturnoe oformlenie processa sushki i osteklovyvanija radioaktivnyh pul'p, osnovannogo na ispol'zovanii gaza teplonositelja v sisteme. (author)

  5. Preparation of Uranium Dioxide by Electrochemical Reduction in Ammonium Carbonate Solutions and Subsequent Precipitation; Preparation de bioxyde d'uranium par reduction electrochimique dans des solutions de carbonate d'ammonium et precipitation; Prigotovlenie dvuokisi urana metodom ehlektrokhimicheskogo vosstanovleniya v rastvore karbonata ammoniya s posleduyushchim osazhdeniem; Preparacion de dioxido de uranio por reduccion electroquimica en soluciones de carbonato amonico u precipitacion subsiguiente

    Energy Technology Data Exchange (ETDEWEB)

    Pravdic, V.; Branica, M.; Pucar, Z. [Department of Physical Chemistry, Rudjer Boskovic Institute, Zagreb, Yugoslavia (Serbia)

    1963-11-15

    tecnologicos. Se construyo una celda electrolitica de cloruro de polivinilo duro con catodo de mercurio de aproximadamente 2,5dm{sup 2} de superficie y anodos de platino. El catolito estaba separado del anolito por membranas de intercambio cationico. El catolito se hizo circular entre dos depositos de 50 1 y se dirigio hacia el catodo de mercurio sometido a una agitacion energica. El potencial del mercurio se mantuvo constante en -1,5 V comprobandolo con un electrodo patron de Ag/AgCl/KCl (sat.). El rendimiento de la corriente es aproximadamente el 90% y la energia consumida para el proceso de reduccion esde unos 0,8 kWh/kg de dioxido de uranio. Una vez terminada la electrolisis, se inicio la precipitacion calentando simplemente a 70 deg. C la solucion limpida de color verde obscuro, en otro recipiente de vidrio de 60 1 de capacidad. A partir de 50 1 de solucion de catolito se obtuvo por centrifugacion 1 kg de producto (conteniendo alrededor de un 20% de agua). El analisis por culombimetria de la razon O/U dio resultados siempre comprendidos entre 2,04 y 2,09. El procedimiento descrito permite precipitar selectivamente el oxido hidratado de uranio (IV) observandose que la razon O/U en el precipitado es independiente del grado que haya alcanzado la reduccion. Analizando el polvo por difraccion de rayos X , se pudo identificar el producto como la fase alfa del dioxido de uranio. Se estan realizando experimentos de sinterizacion y caracterizacion del dioxido de uranio obtenido de esta manera a fin de comprobar en que medida responde a las especificaciones para combustibles nucleares ceramicos. (author) [Russian] Dlya polucheniya bol'shego kolichestva materiala, neobkhodimogo dlya tekhnologicheskikh ispytanij, sdelana popytka rasshirit' masshtab protsessa. Byl skonstruirovan ehlektrolizer iz tverdogo polivinil- khlorida s rtutnym katodom okolo 2,5dm''2 i platinovymi anodami. Katodnyj rastvor otdelyalsya ot anodnogo kationoobmennymi membranami. Katodnyj rastvor tsirkuliroval mezhdu

  6. Influence of Aerosol Properties and the Respiratory Pattern upon Hazards Evaluation following Inhalation Exposure; Influence des Caracteristiques des Aerosols et du Regime de la Respiration sur l'Evaluation des Risques, a la Suite d'une Exposition par Inhalation; Vliyanie svojstv aehrozolej i obraztsa respiratora na otsenku opasnosti oblucheniya pri vdykhanii radioaktivnykh veshchestv; Influencia de las Propriedades de los Aerosoles y de su Esquema Repiratorio en la Evaluacion de los Riesgos Consecutivos a una Exposicion por Inhalacion

    Energy Technology Data Exchange (ETDEWEB)

    Thomas, R. G. [Lovelace Foundation for Medical Education and Research, Albuquerque, NM (United States)

    1964-10-15

    diferentes caracteristicas fisicas y quimicas de las particulas inhaladas y las tres variables biologicas antes mencionadas. Se presentan datos acerca de la cantidad y localizacion de la sustancia depositada, determinados en funcion del tamano de las particulas inhaladas, en el caso de un compuesto soluble en los tejidos (cloruro de cesio) y en el caso de un compuesto insoluble en los tejidos (Cloruro de torio). Asimismo, se facilita informacion encaminada a explicar las variaciones que se producen en la distribucion de un elemento en los tejidos y en su excrecion, segun su forma fisicaca y quimica al ser inhalado. Se exponen datos proporcionados por los experimentos realizados con aerosoles de muchas sustancias, entre ellas las ya mencionadas, para poner de manifiesto la peculiar correlacion existente entre la carga corporal y la excrecion por via fecal durante los primeros dias consecutivos a la exposicion. Se demuestra la ventaja de efectuar a la vez analisis de orina y de heces para determinaciones biologicas. Utilizando los anteriores datos como ejemple, se ponen de relieve los errores inherentes a los actuales metodos de evaluacion practica de riesgos, basados en el analisis de muestras de aire y de sustancias biologicas. (author) [Russian] Imeetsja tri vazhnyh biologicheskih parametrov, neobhodimyh dlja ocenki opasnosti v rezul'tate popadanija soedinenij v organizm ljubym putem. K nim otnosjatsja: 1) kolichestvo otlozhivshegosja v organizme veshhestva; 2) raspredelenie i kinetika peremeshhenij v organizme; 3) skorost' vyvedenija veshhestva. Pri sluchajnom obluchenii v celom otsutstvujut dostatochnye kolichestvennye dannye po jetim punktam. V doklade izlagajutsja dannye jeksperimental'nyh issledovanij na zhivotnyh, pokazyvajushhie sootnoshenie mezhdu razlichnymi fizicheskimi i himicheskimi harakteristikami vdyhaemyh chastic i upomjanutymi vyshe tremja biologicheskimi peremennymi. Predstavleny dannye o kolichestve i lokalizacii otlozhivshegosja materiala kak funkcii

  7. Liquid Scintillation Detection of Tritium and other Radioisotopes in Insoluble or Quenching Organic Samples; Detection par compteur a scintillations a liquides du tritium et des autres radioelements contenus dans des echantillons organiques insolubles ou coupeurs; Obnaruzhenie tritiya metodom zhidkostnoj stsintillyatsii v nerastvorimykh ili sposo'nykh gasit' izluchenie organicheskikh o'raztsakh; Deteccion del tritio u otros radioisotopos por centelleo liquido en muestras organicas insolubles o que provocan extincion

    Energy Technology Data Exchange (ETDEWEB)

    Eastham, J F; Westbrook, H L; Gonzales, D [University of Tennessee, Knoxville, TN (United States)

    1962-01-15

    stsintillyatsionnoe gashenie mnogimi organicheskimi obraztsami i ogranichennaya rastvorimost ' drugikh, prisushchi takzhe biologicheskim veshchestvam. Razrabotannye protsedury vklyuchayut v sebya okislenie obernutogo v fil'troval'nuyu bumagu obraztsa v kolbe, napolnennoj kislorodom, obrazovanie rastvora okislennykh produktov v sootvetstvuyushchem rastvoritele, dobavlennom v kolbu pered okisleniem, i stsintillyatsionnyj schet rastvora. Preimushchestva razrabotannykh protsedur dlya preodoleniya ukazannykh ogranichenij vklyuchayut: kachestvo operatsii s obraztsami bol'shogo diapazona aktivnosti (nekotorye s takoj nizkoj aktivnost'yu kak 1{mu}c//mo1e), bol'shuyu tochnost' (takuyu zhe kak pri lyubom drugom obshchem metode izmereniya radioaktivnosti H{sup 3}), i primenimost' k drugim myagkim beta-izluchatelyam (C{sup 14} i k{sup 35}). S pomoshch'yu stsintillyatsionnogo spektrometra i razrabotannykh protsedur mozhet byt' razdel'no izmerena radioaktivnost ' obraztsov mechennykh trizhdy H{sup 3}, C{sup 14} i k{sup 35}. Detali, kasayushchiesya sistem rastvoritelya i razrabotannykh metodov, budut izlozheny v doklade, krome togo v nem budet dana rabochaya kharakteristika novogo, otnositel'no nedorogogo odnokanal'nogo stsintillyatsionnogo spektrometra. Budut izlozheny analiticheskie rezul'taty, kasayushchiesya takogo gasyashchego izluchenie materiala, kak 2,4-dinitro-fenilgidrozony i tiazolidy, a takzhe takikh nerastvorimykh materialov, kak proteiny i ugolevdy. Budet obsuzhdeno primenenie metodov k otsenke izotopnogo ehffekta H{sup 1}/H{sup 3} v opredelennykh reaktsiyakh vosstanovleniya. (author)

  8. The Use of Technetium-99m as a Clinical Scanning Agent for Thyroid, Liver and Brain; Utilisation du {sup 99m}Tc comme Agent d'Exploration Clinique de la Thyroide, du Foie et du Cerveau; Ispol'zovanie Tc{sup 99m} kak klinicheskogo agenta pri skennirovanii shchitovidnoj zhelezy, pecheni i mozga; Empleo del {sup 99m}Tc como Agente para la Exploracion Clinica de la Tiroides, el Higado y el Cerebro

    Energy Technology Data Exchange (ETDEWEB)

    Harper, P. V.; Lathrop, K. A.; McCardle, R. J.; Andros, G. [Argonne Cancer Research Hospital and Department of Surgery, University of Chicago Hospitals and Clinics, Chicago, IL (United States)

    1964-10-15

    zhelezy s raschetnoj dozoj obluchenija 100 mlrd. na zhelezu i 5 mlrd. na ves' organizm mogut byt' snjaty v period ot poluchasa do 1 chasa posle vvedenija 1 mkjuri jetogo materiala -jeto bol'shoe preimushhestvo po sravneniju s jodom-131. Tc{sup 99m} ne pronikaet cherez gemato-jencefalicheskij bar'er, pojetomu jeffektnye skennogrammy mozga byli polucheny v techenie 2 - 5 minut pri vysokoj skorosti scheta v rezul'tate ispol'zovanija 5 - 10 mkjutjei tehnecija-99 t. Poskol'ku pjativalentnyj tiocianat rastvoren v zhirovoj jemul'sii, tehnecij-99t v znachitel'noj stepeni lokalizuetsja i pecheni: ppi bol'shoj skooosti schetja snova mozhno poluchit' skennogoammm jetogo opgjanja s luchshim razresheniem. Predpolagaetsja, chto pri ispol'zovanii jetogo izotopa mozhno poluchit' luchshie rezul'taty pri primenenii bolee jeffektivnyh prob i podbora biologicheskih i himicheskih parametrov. (author)

  9. Wear studies in the shearing process by means of irradiated tools; Etudes d'usure dans les operations de cisaillement, au moyen d'outils irradies; Issledovaniya problemy iznosa v protsesse skalyvaniya posredstvom obluchennykh instrumentov; Estudios de desgaste en las operaciones de cizallamiento, realizados con ayuda de herramientas irradiadas

    Energy Technology Data Exchange (ETDEWEB)

    Sata, Toshio; Abe, Kunio; Nakajima, Kiyoshi [Institute of Physical and Chemical Research, Komagome, Bunkyo-Ku, Tokyo (Japan)

    1962-01-15

    del punzon y de la matriz al emplear lubricantes y laminas metalicas de distintos tipos, obteniendose los resultados siguientes: 1) Al comienzo de la operacion, los indices de desgaste del punzon y de la matriz son muy elevados, pero disminuyen rapidamente, para estabilizarse despues de haber recortado entre 400 y 500 piezas; 2) El desgaste del punzon supera en un 20 por ciento al de la matriz; 3) Los lubricantes con aditivos especiales para altas presiones (compuestos de cloro, fosforo o azufre) reducen el desgaste de las herramientas, mientras que los aceites minerales refinados ejercen poco efecto; 4) Cuanto mas duro es el metal trabajado, tanto mayor es el desgaste de las herramientas; el desgaste al punzonar acero inoxidable y acero al silicio es tres y seis veces superior, respectivamente, al observado en el caso del acero pobre en carbono. (author) [Russian] Iznos instrumenta v protsesse skalyvaniya metallicheskogo lista issledovalsya s pomoshch'yu probojnikov i stal'nykh puansonov s bol'shoj skorost'yu shtampovki, obluchennykh v yadernom reaktore. Kruglye diski diametrom 10 mm shtampuyutsya iz stal'nogo lista s nizkim soderzhaniem ugleroda tolshchinoj 0,5 mm, nerzhaveyushchej stali i kremnievoj stali, sukhim sposobom i so smazkoj. Posle shtampovki izmeryalas' radioaktivnost' diskov otverstij. Kogda radioaktivnyj puanson zamenyalsya neradioaktivnym, to na diskakh obnaruzhivalas' neznachitel'naya radioaktivnost' v to vremya, kak radioaktivnost' v otverstiyakh edva izmenyalas'. EHto pokazalo, chto iznos puansona mozhno opredelit' po radioaktivnosti diskov, a iznos probojnikov - po radioaktivnosti otverstij. S pomoshch'yu ehtogo metoda iznos probojnikov i puansonov proveryalsya pri ispol'zovanii razlichnykh vidov smazochnogo materiala i metallicheskogo lista i byli polucheny sleduyushchie rezul'taty: 1) V nachale shtampovki skorost' iznosa kak probojnika, tak i puansona ochen' bol'shaya, no ona bystro snizhaetsya i stanovitsya, nakonets, postoyannoj posle

  10. Design Experience on a Multi-Mecacurie Radiation Facility; Etudes et experiences concernant un emetteur de rayonnements de plusieurs megacuries; Opytnoe proektirovani e ustanovki, obladayushchej sverkhmoshchnym izlucheniem; Estudios sobre el proyecto de un dispositivo de irradiacion de varios megacuries

    Energy Technology Data Exchange (ETDEWEB)

    Brunton, D C; Donovan, J; Voyvodic, L [Curtiss-Wright Corporation, Princeton, NJ (United States); Armour Research Foundation, 10 W. 35th Street, Chicago 10, IL (United States)

    1960-07-15

    issledovanij mnogodiskovykh, mnogokanal'nykh sistem, a poehtomu ona vklyuchaet trekhrazmernuyu formu istochnika, a takzhe diskovye tipy izluchatelej. Potrebnosti inzhenernogo kharaktera, kasayushchiesya konvejerov dlya obrashcheniya s produktami, izuchayutsya sovmestno s proektom istochnika i vliyaniem na usloviya stroitel'stva . Podrobno izuchayutsya metody obrashcheniya s istochnikom, sistema bezopasnosti i kontrol'. Nakonets, daetsya opisanie podgotovki samogo iskhodnogo materiala, vklyuchaya izmereniya, zadelyvanie v kapsyulyu i ispytanie utechki. (author)

  11. The Role of Diffusion Measurements in the Study of Crystal Lattice Defects; Role des Mesures de la Diffusion dans l'Etude des Defauts des Reseaux Cristallins; Rol' diffuzionnykh izmerenij v izuchenii defektov kristallicheskikh reshetok.rol' diffuzionnykh izmerenij v izuchenii defektov kristallicheskikh reshetok; Las Mediciones de la Difusion en el Estudio de Defectos de los Reticulados Cristalinos

    Energy Technology Data Exchange (ETDEWEB)

    Kidson, G. V. [Chalk River Nuclear Laboratories, ON (Canada)

    1966-02-15

    aluminiopuros, y el mecanismo de difusion se interpreta en terminos de la estructura del reticulado compuesto. Los resultados indican que el ZrAl{sub 3} forma un reticulado con defectos, lo que conduce a la migracion relativamente rapida de los atomos de aluminio. (author) [Russian] Izmerenie podvizhnosti atomov v tverdyh telah chasto predstavljaet neposredst- vennyj interes dlja lic, zanimajushhihsja konstruirovaniem, razrabotkoj i ispol'zovaniem materialov v tehnike. Odnako v nastojashhee vremja vse bol'shee vnimanie udeljaetsja izucheniju takih svojstv s uchetom nalichija i haraktera tochechnyh i linejnyh defektov v kristallah. Rassmatrivajutsja nekotorye poslednie issledovanija diffuzii, provedennye v Jadernyh labora- torijah Chok-River, kotorye ne tol'ko dajut dannye, predstavljajushhie interes dlja jader- noj tehnologii, no i pozvoljajut bolee fundamental'no ponjat' harakter defektov reshetok, vstrechajushhihsja v materialah. Rassmatrivaemymi sistemami javljajutsja: 1) samodiffuzija v vysokotemperaturnoj faze chistogo cirkonija; 2) diffuzija rastvorennogo veshhestva v svin- ce i 3) vzaimnaja diffuzija aljuminija i cirkonija. Kratko rassmatrivajutsja neobychnye i v nastojashhee vremja ne polnost'ju ponjatye rezul'taty, soderzhashhiesja v punkte 1). Privodjatsja dannye, kotorye dajut osnovanie predpolagat', chto diffuzija proishodit ili cherez plot- nuju sistemu dislokacii, obrazovavshujusja v rezul'tate transformacii martensitovoj fazy, ili cherez izbytochnye vakansii v kristalle, svjazannye s primesjami. Vo vtorom punk- te budet obsuzhdat'sja vopros o chrezvychajno bystroj diffuzii rastvorennyh blagorodnyh metallov v monokristallah svinca vysokoj chistoty s tochki zrenija sostojanija atomov rastvo- rennogo veshhestva. Pokazano, chto ih diffuzionnoe povedenie mozhet byt' ponjato, esli predpolozhit', chto frakcija f{sub i} atomov rastvorennogo veshhestva zanimaet mezhdouzlija. Izmerennyj kojefficient diffuzii Ot s v jazans kojefficientom mezhdouzlovoj diffuzii otno- sheniem

  12. Incorporation of Radioisotopes into Melted Silicates; Incorporation de Radioisotopes dans des Silicates Fondus; 0412 0412 0415 0414 0415 041d 0418 0415 0420 0410 0414 0418 041e 0418 0417 041e 0422 041e 041f 041e 0412 0412 0420 0410 0421 041f 041b 0410 0412 041b 0415 041d 041d 042b 0415 0421 0418 041b 0418 041a 0410 0422 042b ; Incorporacion de Radioisotopos en Silicatos Fundidos

    Energy Technology Data Exchange (ETDEWEB)

    Rakova, J.; Saidl, J. [Nuclear Research Institute Rez near Prague, Czechoslovak Socialist Republic (Czech Republic)

    1963-02-15

    vyshhelachivanija cezija i stroncija iz rasplavlennyh porod bol'shaja chast' vyshhelochennoj radioaktivnosti byla obnaruzhena v nachal'noj faze processa vyshhelachivanija-. Po istechenii 100 chasov process vyshhelachennyh radioizotopov stal postojannoj velichinoj. Skorost' vyshhelachivanija po istechenii prodolzhitel'nogo vremeni, verojatno, opredeljaetsja obshhej korrozionnoj stojkost'ju, a takzhe vnutrennej diffuziej rastvorimyh jelementov iz serediny tverdogo tela k poverhnosti. Korrozionnaja stojkost' stekla i rasplavlennyh porod izuchalas' v staticheskom sostojanii pri postojannoj temperature (35, 60 i 90 Degree-Sign C), i najdennye kojefficienty vyshhelachivanija byli v predelah 10{sup -11} -10{sup -9} cm{sup -2}sec{sup -1} (pri 35 Degree-Sign C). Jeti rezul'taty pokazyvajut, chto issledovavshiesja mineraly javljajutsja prigodnoj osnovoj dlja vvedenija nekotoryh vysokoaktivnyh othodov. Esli vysokoaktivnye othody budu udaljat'sja pri kontroliruemyh uslovijah, iskljuchajushhih kakoj-libo kontakt s vodoj, mozhno garantirovat' bezopasnost' jetogo udalenija. (author)

  13. Open loop control of the five-axis missile and target flight motion simulator implementation / Внедрение системы управления пятиосевых имитаторов полета ракеты и воздушной цели в разомкнутом цикле / Implementacija upravljanja petoosnim simulatorom leta rakete i cilja u otvorenoj petlji

    Directory of Open Access Journals (Sweden)

    Nataša D. Kljajić

    2016-07-01

    вижения ракеты и воздушной цели, разработанного в лаборатории программно-аппаратного моделирования. Описанное в работе приложение имитатора обеспечивает эффективный контроль и безопасную среду, так как используя данную систему инженер-испытатель может сосредоточиться на функциональности устройства и быть уверенными в реальных параметрах движения ракеты. Решение разработано на платформе LabVIEW программного комплекса, с робастной архитектурой программного обеспечения, под названием «классический конечный автомат». / Razvoj raketnih sistema podrazumeva važne faze testiranja i simulacije leta rakete u uslovima okruženja koje diktira operacija za koju je sistem izrađen. Kako terenska ispitivanja ovako složenih sistema zahtevaju veliki utrošak finansijskih resursa, a i mnogo vremena, simulacije koje podrazumevaju hardver u petlji (Hardware in the loop - HIL predstavljaju vrlo efikasno rešenje za smanjenje troškova razvoja i testiranja. U ovom radu predstavljena je implementacija upravljanja, odnosno sinhronizovanog generisanja i akvizicije podataka na petoosnom simulatoru leta rakete i cilja laboratorije za hardver u petlji (HIL laboratorije. Opisana aplikacija za simulaciju javila se kao rezultat potrebe inženjera razvoja raketa za jednostavnim načinom akviziranja informacja o odzivu realne rakete na željena i zadata upravljanja. Rešenje je realizovano u LabVIEW softverskom paketu primenom robusne arhitekture softvera, takozvane klasične mašine stanja.

  14. Chemical Behaviour of C{sup 11} in Liquid Hydrocarbons; Comportement Chimique de {sup 11}C dans les Hydrocarbures Liquides; Khimicheskaya kharakteristika ugleroda-11 v zhidkikh uglevodorodakh; Comportamiento Quimico del {sup 11}C en Hidrocarburos Liquidos

    Energy Technology Data Exchange (ETDEWEB)

    Voigt, A. F.; Clark, D. E.; Mesich, F. G. [Institute of Atomic Research and Department of Chemistry, Iowa State University, Ames, IA (United States)

    1965-04-15

    obshhim kolichestvom obrazovavshegosja C{sub 11}, izmerennym vo vsem obrazce pered razdeleniem. Protochnye schetchiki kalibrovalis' pri uslovii obrazovanija vsego Si v hode jeksperimentov, v processe kotoryh ves' obrazec szhigalsja, prevrashhajas' v CO{sub 2}, i prohodil cherez protochnyj schetchik. Nashi bolee rannie jeksperimenty byli svjazany tol'ko s ispol'zovaniem gazoobraznyh produktov, kotorye v nastojashhee vremja horosho zarekomendovali sebja v otnoshenii molekul razlichnyh veshhestv misheni pri raznyh znachenijah dozy. Tekushhie jeksperimenty s proizvodnymi molekulami, podobnymi po razmeru molekulam materiala misheni, okazalis' ochen' poleznymi pri izuchenii voprosa o mehanizmah rekombinacii atomov otdachi. Osobyj interes predstavljaet vyhod produkta s odnim atomom ugleroda bol'she po sravneniju s mishen'ju, chto javljaetsja rezul'tatom novoj reakcii. Raspolozhenie dopolnitel'nogo atoma v molekule veshhestva misheni, kotoroe harakterizuetsja nalichiem neskol'kih dopolnitel'nyh tochek, daet informaciju otnositel'no samogo processa. Pri zamedlenii atoma otdachi do velichiny jenergii, pri kotoroj vozmozhno ustanovlenie svjazi, po krajnej mere vremenno, izlishnjaja jenergija, kotoruju prinosit v sistemu atom C{sub 11}, mozhet privesti k razryvu svjazi gde-libo v drugom meste v predelah aktiviruemogo kompleksa, chto obychno privodit k obrazovaniju dvuhuglerodnogo produkta. Esli kompleks mozhet byt' sohranen bez razryva, to obrazuetsja dopolnitel'nyj produkt. Takim obrazom, sravnenie vyhodov dvuhuglerodnyh soedinenij, acetilena, jetilena i jetana i dopolnitel'nyh produktov predostavljaet cennuju informaciju otnositel'no jenergii, pri kotoroj vozmozhno obrazovanie ustojchivoj svjazi, i haraktera soderzhashhej C{sub 11} gruppy, vstupajushhej v reakciju. (author)

  15. The Role of Non-Destructive Testing in the Los Alamos Reactor Programme; Role des Essais Non Destructifs dans le Programme de Reacteurs de los Alamos; Rol' nedestruktivnykh ispytanij materialov v Los-Alamosskoj reaktornoj programme; Papel de los Metodos de Ensayo No Destructivo en el Programa de Reactores de Los Alamos

    Energy Technology Data Exchange (ETDEWEB)

    Tenney, G. H. [University of California, Los Alamos Scientific Laboratory, Los Alamos, NM (United States)

    1965-10-15

    prokatannogo lista iz slitka. Osushhestvljalsja takzhe kontrol' za svarnymi shvami. Byl razrabotan metod proverki potenciala jelektroda dlja kontrolja zolotyh poverhnostej dlja obnaruzhenija soderzhashhihsja zagrjaznenij. Osnovnaja koncepcija LARJeRP (Los-Alamosskij reaktornyj jeksperiment s rasplavlennym plutoniem) zakljuchaetsja v ispol'zovanii v kachestve topliva skoree zhidkogo, chem tverdogo metallicheskogo plutonija. Tantalovye kapsuly soderzhali toplivo. Byli ispol'zovany novye metody kontrolja bez razrushenija dlja proverki prochnosti osnovnogo materiala i svarok vo vremja proizvodstva kapsul, a takzhe dlja izuchenija kapsul, zapolnennyh plutoniem do, vo vremja i posle kontrolja metodom ohlazhdennoj plavki. Za jeksperimentom po perekachke rasplavlennogo plutonija nabljudali s pomoshh'ju radiograficheskih metodov, vkljuchaja gamma- luchi, svjazannye s konturom televedenija. Dlja RJeUVT (Reaktornyj jeksperiment pri ul'tra-vysokojtemperature), kotoryj v nastojashhee vremja nahoditsja v stadii stroitel'stva, byli provedeny mikroradiograficheskie i jelektronno-mikroskopicheskie issledovanija na sharikah diametrom 150 mikron iz karbida urana, pokrytyh pirouglerodom, dlja ocenki migracii urana kak funkcija temperatury. Kolichestvo i odnorodnosti uranovoj zagruzki v grafitovyh jelementah RJeUVT opredeljajutsja s pomoshh'ju special'no skonstruirovannyh scintilljacionnyh schetchikov. Primerno 90% raboty po jetoj teme ranee ne bylo opublikovano. (author)

  16. Criteria for Special Nuclear Materials Inventory and Control Procedures; Criteres a Suivre Pour Proceder a l'Inventaire des Matieres Nucleaires Speciales et aux Mesures de Controle; Kriterii dlya inventarizatsii spetsial'nykh yadernykh materialov i metody ucheta; Criterios a Que Deben Ajustarse los Procedimientos de Inventario y Control de los Materiales Nucleares Especiales

    Energy Technology Data Exchange (ETDEWEB)

    Kinderman, E. M.; Tarrice, R. R. [Stanford Research Institute, Menlo Park, CA (United States)

    1966-02-15

    bol'shinstvom promyshlennyh materialov, naprimer v SShA ceny na uran 90%-go obogashhenija i na uran 3%-go obogashhenija v vide shestiftoristogo urana i na tjazheluju vodu sostavljajut so otvetstvenno 10 808, 254 i 61,60 doll. SShA za 1 k g . Bolee togo, vo mnogih sluchajah jeti materialy, kak togo trebu- et ohrana zdorov'ja i tehnika bezopasnosti, nahodjatsja pod special'nym pravitel'stvennym kontrolem, ne svjazannym neposredstvenno s ih denezhnoj stoimost'ju. Nesmotrja na bol'shuju stoimost' jetih materialov, predusmatrivaetsja primenjat' ih v bol'shom kolichestve; napri- mer, v reaktore s vodnym zamedlitelem moshhnost'ju 500 mgvt budet ispol'zovano priblizi- tel'no 50 - 75 t materiala 3%-go obogashhenija, i, verojatno, vo v s em mire k 1980 godu moshhnost' reaktorov, nahodjashhihsja v jekspluatacii, budet jekvivalentno ravna moshhnosti priblizi- tel'no 200 - 300 reaktorov takogo razmera. Na osnovanii proshlogo opyta razrabotany special'nye metody i nalazhena praktika promyshlennogo ucheta nedorogostojashhih materialov v bol'shom kolichestve, naprimer ugol' ili zheleznaja ruda, i dorogostojashhih materialov v nebol'shom kolichestve, naprimer dragocen- nye metally . Pri pochti odinakovyh cenah special'nye jadernye materialy razlichajutsja po vidu i budut ispol'zovat'sja v kolichestvah, znachitel'no ''ol'shih po sravneniju s dragocennymi metallami. Hotja, verojatno, potrebujutsja special'nye metody ili sootvetstvuju- shhee izmenenie staryh metodov, nadlezhashhee ispol'zovanie mnogoobraznoj ustanovlennoj praktiki proverki i ucheta dolzhno okazat'sja dostatochnym v bol'shinstve sluchaev dlja dolzhnoj zashhity kapitalovlozhenij stran i otdel'nyh lic v proizvodstvo jetih dorogostojashhih materialov. Ustanavlivajutsja kriterii dlja ucheta materialov. Special'no rassmatrivaetsja vopros o, sootvetstvii razlichnyh metodov inventarnogo kontrolja, nachinaja ot sostavlenija ezhegodnyh balansov uch et a postuplenij i otpravok do podrobnoj ezhednevnoj fizicheskoj inventarnoj

  17. In Vivo and Air Dosimetry of Fission-Spectrum Neutrons; Dosimetrie In Vivo et dans l'Air du Spectre des Neutrons de Fission; Dozimetriya v vozdukhe i dozimetriya In Vivo nejtronov spektra deleniya; Dosimetria In Vivo y en el Aire de Neutrones de un Espectro de Fision

    Energy Technology Data Exchange (ETDEWEB)

    Mobley, T. S.; Engel, R. E.; Godden, W. R. [Kirtland Airforce Base, New Mexico (United States); Penikas, V. T. [AFIT, Wright-Patterson Air Force Base, Ohio, with Duty Station at University of Rochester, School of Medicine and Dentistry, Rochester, NY (United States)

    1964-03-15

    rumenotomfa empleada. La dosis neutronica se determina mediante laminas de umbral. Para medir el flujo integrado de neutrones termicos, se utilizaron las laminas de oro y de oro recubierto de cadmio; para el flujo integrado de neutrones rapidos, se recurrio al plutonio-239, al neptunio-237, al uranio-238 y al azufre-32; la dosis gamma se determino con varillas de vidrio radiofotoluminiscentes. Las ovejas fueron sometidas a exposiciones laterales, a una distancia de linea media de 200 o 175 cm del centro del conjunto critico. La dosis neutronica medida en el aire, a 200 cm, fue 161 {+-} 5 ,5 rad; y a 175 cm, fue 242 {+-} 16,6 rad. A las mismas distancias, la dosis gamma fue, respectivamente, 33 {+-} 2,4 y 42 {+-}2,5 r. Las dosis de entrada y salida, asi como la dosis recibida por el aposito interno varian con el ascenso de temperatura, la distancia al reactor, la orientacion de las laminas con respecto a este y el espesor y composicion de los tejidos atenuadores. (author) [Russian] Dlja opredelenija glubinnoj dozy vo vremja obluchenija nejtronami spektra delenija na ovcah razrabotan metod dozimetrii nejtronov in vivo. Dlja issledovanij ispol'zovalas impul'snaja reaktornaja sborka podobnaja sborke Godiva I I Los-Alamosskoj nauchnoj laboratorii. Reak tor rabotal v impul'snom rezhime, proizvodja impul'sy prodolzhitel'nost'ju 50 mksek shirinoj v polovinu vysoty maksimal'nogo impul'sa, prichem temperatura toplivnogo materiala povyshalas' primerno do 100 Degree-Sign S. Podkozhnyj detektor soderzhal kadmij, pokrytyj zolotoj fol'goj, prostuju zolotuju fol'gu i tri stekljannyh termoljuminescentnyh sterzhnevyh dozimetra v stekljannom kontejnere, vylozhennom litiem i svincom. Jeti detektory pomeshhalis' v podkozhnoj tkani po obeim storonam tela dlja obnaruzhenija integrirovannogo potoka teplovyh nejtronov i gamma-dozy, tak kak potoki nejtronov napravljalis' sboku. Detektory dlja brjushnoj polosti byli podgotovleny takim zhe obrazom, kak i dlja podkozhnogo vvedenija, i sostojali iz

  18. Biological Monitoring for Plutonium-241; Detection du Plutonium-241 par Controles Biologiques; Dozimetriya Plutoniya-241 v biologicheskikh materialakh; Determinacion del Plutonio-241 en Sustancias Biologicas

    Energy Technology Data Exchange (ETDEWEB)

    Dalton, J. C.; McDonald, B. J.; Barnes, V. [United Kingdom Atomic Energy Authority, Windscale Works, Sellafield (United Kingdom)

    1965-10-15

    {pi}. El equipo construido hasta la fecha puede detectar 3 pCi de {sup 241}Pu en un recuento de 1 h. Esta cantidad representa la excretada por la orina durante 24 h a los 3 meses de absorber el 5% de la carga corporal maxima admisible (0,9 {mu}Ci). Seguidamente los discos se analizan para determinar los isotopos del plutonio emisores alfa colocandolos durante una semana sobre una placa nuclear, que se examina visualmente bajo el microscopio. (author) [Russian] Opisyvajutsja proishozhdenie i harakteristiki plutonija-241. Podcherkivajutsja soobrazhenija otnositel'no vreda jetogo jelementa dlja zdorov'ja i problemy ego opredelenija. Opisyvaetsja sistema scheta, vyrabatyvaemaja v nastojashhee vremja v Uindskejle dlja kolichestvennogo opredelenija plutonija-241 maloj aktivnosti v probah, sobiraemyh po programme biologicheskogo dozimetricheskogo kontrolja. Na nastojashhej stadii razrabotki jetot metod po men'shej mere stol' zhe chuvstvitelen, kak opisannye ranee, i obladae't preimushhestvami blagodarja prostote, bystrote i jekonomichnosti. Jetot metod prednaznachen v pervuju ochered' dlja analiza mochi dlja dopolnenija informacii, uzhe poluchennoj posredstvom radioavtograficheskogo analiza al'fa-aktivnyh radioizotopov plutonija. Dlja opredelenija kolichestva plutonija-241 ispol'zuetsja tot zhe samyj diskovyj istochnik, chto pozvoljaet sokratit' podgotovitel'nye raboty. Radioizotopy plutonija prezhde vsego izvlekajut iz proby mochi ili drugogo biologicheskogo materiala v sostojanii bol'shoj radiohimicheskoj chistoty posredstvom anionoobmena. V rezul'tate jelektroliza oni otkladyvajutsja na diske iz nerzhavejushhej stali. Neposredstvennyj otschet mjagkogo beta-spektra plutonija-241 (maksimal'naja jenergija 20 kjev, period poluraspada 13,3 goda) proizvoditsja s pomoshh'ju sistemy antisovpadenij, sostojashhej iz proporcional'nogo schetchika malogo ob{sup e}ma s gazovym potokom i iz zashhity s plasticheskim fosfornym scintilljatorom antisovpadenij. Razmery takovy, chto vse beta

  19. Integral physics data for fast-reactor design; Donnees de physique integrale intervenant dans les etudes de reacteur a neutrons rapides; Integral'nye fizicheskie dannye dlya raschetov reaktorov na bystrykh nejtronakh; Datos fisicos integrales para el diseno de reactores rapidos

    Energy Technology Data Exchange (ETDEWEB)

    Loewenstein, W B; Meneghetti, D [Argonne National Laboratory, Argonne, IL (United States)

    1962-03-15

    dannye po fakticheskim ehnergeticheskim reaktoram-razmnozhitelya m na bystrykh nejtronakh. EHti sistemy slishkom slozhny dlya prove- deniya prostogo teoreticheskogo analiza. Oni svidetel'stvuyut o slozhnosti fakticheskogo reaktora po sravneniyu s bolee idealizirovanny m i legko analiziruemym kriticheskim opytom. Integral'nye fizicheskie dannye dlya rascheta reaktora polucheny v rezul'tate provedennykh na reaktornykh sistemakh kriticheskikh ili nekriticheskikh izmerenij, razlichnykh velichin reaktornoj fiziki, imeyushchikh prakticheskoe j teoreticheskoe znacheniya, ili to ili drugoe znachenie. Oni kharakterizuyut i pozvolyayut ponyat' sistemu. Dany izmereniya kriticheskoj massy, koehffitsienta formy aktivnoj zony, koehffitsientov detektorov, spektrov nejtronov, opytov s zamenoj materiala, otrazhatel'noj dobavki, vremeni zhizni nejtronov, Rossi-{alpha} i podobnykh kharakteristik i velichin. V doklade rassmatrivayuts ya ehti dannye i opisyvayutsya oblasti ikh primeneniya. Pokazano, chto sushchestvuyut ogranicheniya i v ehksperimental'ny kh i v analiticheskikh rezultatakh pri analizakh spektra i kritichnosti sistemy. Dany nametki budushchikh ehksperimental'ny kh i analiticheskikh issledovanij. Ehti issledovaniya pomogut umen'shit' razryv mezhdu teoriej i opytom dlya 'izvestnykh' sistem. Namechayutsya takzhe issledovaniya po 'podkrepleniyu' dannykh fiziki krupnykh ehnergeticheskikh reaktorov-razmnozhitelej na bystrykh nejtronakh. (author)

  20. Materials Control in the Fabrication of Enriched Uranium Fuels; Controle des Matieres au Cours de la Fabrication des Combustibles a Base d'Uranium Enrichi; Uchet materialov pri izgotovlenii topliva na obogashchennom urane; Control de Materiales en la Elaboracion de Combustibles de Uranio Enriquecido

    Energy Technology Data Exchange (ETDEWEB)

    Cardwell, Jr., R. G. [Oak Ridge National Laboratory, Oak Ridge, TN (United States)

    1966-02-15

    densidad. La manipulacion de la chatarra tuvo una importante influencia en el balance de los materiales que confirmo el contenido de combustible y aseguro una buena contabilizacion. Los procedimientos de manipulacion y registro, y en particular los metodos de determinacion de las partidas y de marcacion fisica, se formularon de tal manera que constituyeron una buena ayuda para el fabricante en lo que respecta al control de la criticidad. (author) [Russian] Usilennaja dejatel'nost' v oblasti tehnologii teplovydeljajushhih jelementov, provodivshajasja v Okridzhskoj nacional'noj laboratorii na protjazhenii poslednih 15 let, privela k vyrabotke racional'nyh tehnologicheskih processov i metodov ucheta obogashhennyh materialov, kotorye sejchas shiroko primenjajutsja pri izgotovlenii teplovydeljajushhih jelementov v promyshlennom masshtabe. V hode proektirovanija i izgotovlenija prototipov teplovydeljajushhih jelementov dlja zapuska reaktora dlja ispytanija materialov, reaktora s massovoj zashhitoj ili {sup b}assejnovogo tipa{sup ,} kompaktnogo jenergeticheskogo reaktora voennogo obrazca, reaktora s bashennoj zashhitoj, pokazatel'nogo reaktora dlja Zhenevskoj konferencii, izotopnogo reaktora s potokom bol'shoj intensivnosti i jeksperimentol'nogo reaktora s gazovym ohlazhdeniem byli vyrabotany i prinjaty v kachestve ustanovlennyh norm nadezhnye metody obrashhenija s obogashhennym toplivom v vide splavov, suspenzii ili okisej. Nakoplennyj opyt posluzhil osnovoj dlja dannogo doklada, v kotorom podcherkivajutsja problemy ucheta materialov i ih razreshenie pri izgotovlenii razlichnyh sostavnyh chastej teplovydeljajushhih jelementov razlichnyh tipov na obogashhennom urane. Osnovnymi zadachami pri vyrabotke horoshej sistemy ucheta materialov javljajutsja: 1) sokrashhenie chisla edinic podotchetnogo materiala; 2) vyrabotka otdel'nyh uchetnyh dokumentov dlja kazhdoj vazhnoj stadii izgotovlenija i sostavlenie ih svodki sposobom, pozvoljajushhim s naimen'shej zatratoj truda vyjavljat' mesta

  1. Comparison Of The Worth Of Critical And Exponential Measurements For Heavy-Water-Moderated Reactors; Valeur Relative des Mesures Critiques et Exponentielles pour l'Etude des Reacteurs Ralentis a l'Eau Lourde; Sravnenie tsennosti kriticheskikh i ehksponentsial'nykh izmerenij dlya reaktorov s tyazhelovodnym zamedlitelem; Valor Relativo de las Mediciones Criticas y Exponenciales para los Reactores Moderados por Agua Pesada

    Energy Technology Data Exchange (ETDEWEB)

    Graves, W. E.; Hennelly, E. J. [Savannah River Laboratory, E.I. Du Pont De Nemours and Co., Aiken, SC (United States)

    1964-02-15

    izmerenijah tipa PCTR. V jeksponencial'nyh izmerenijah trudnosti, po-vidimomu, zakljuchajutsja edinstvenno v opredelenii radial'nogo laplasiana. Pri udachnom vypolnenii jeksponencial'nye izmerenija mogut uspeshno konkurirovat' s kriticheskimi. Naibol'shee kolichestvo materiala trebuetsja dlja odnozonnyh kriticheskih izmerenij, primerno odinakovoe kolichestvo-dlja podstanovochnokriticheskih i jeksponencial'nyh izmerenij i menee vsego-dlja izmerenij tipa PCTR. 2) Anizotropnyj i pustotnyj jeffekty Sravnenija jeksperimentov laboratorii s kriticheskimi i kriticheski-jeksponencial'nymi privodjatsja v dannoj rabote, a bolee podrobno oni izlagajutsja v rabote, kotoraja soprovozhdaet dannuju. 3) Ocenka sistem upravlenija Okazalos, chto horosho proanalizirovannye jeksponencial'nye jeksperimenty dajut horoshie rezul'taty dlja izmerenij obshhej znachimosti. Odnako dlja nadlezhashhego izuchenija formirovan- nija obshhego potoka, uglov naklona potoka i t.d. neobhodima polnomasshtabnaja kriticheskaja ustanovka napodobie PDP. 4) Temperaturnye kojefficienty Jeksponencial'nye jeksperimenty javljajutsja prevoshodnym metodom opredelenija temperaturnogo kojefficienta laplasiana dlja nagrevanija odnorodnoj reshetki. Imejushhajasja v laboratorii special'naja ustanovka PSE pozvoljaet proizvodit' takie izmerenija vplot' do temperatury 215 Degree-Sign S. Dlja nagrevanija neodnorodnyh reshetok predpovtenie, kak pravilo, otdavalos' kriticheskim jeksperimentam. 5) Smeshannye reshetki Dlja nastojashhih reaktorov redko primenjajutsja prostye odnorodnye reshetki, dlja kotoryh ispol'zujutsja v osnovnom jeksponencial'nye izmerenija. Kriticheskie jeksperimenty so smeshannymi zagruzkami ispol'zujutsja kak dlja izmerenija prjamyh jeffektov v maketah, tak i dlja ispytanija raschetov geterogennoj i dvuhrazmernoj diffuzii. 6) Issledovanija kritichnosti topliva, ispol'zuemogo v tjazhelovodnyh reshetkah, v obychnoj vode vode Jeksponencial'nye izmerenija okazalis' osobenno cennymi dlja issledovanija kritichnosti s cel

  2. High-Temperature Gas-Cooled Reactor Critical Experiment and its Application to Thorium Absorption Rates; Experience Critique pour l'Etude d'un Reacteur a Haute Temperature, Refroidi par un Gaz et son Application a la Determination des Taux d'Absorption du Thorium; Kriticheskij opyt, postavlennyj na vysokotemperaturnom reaktore s gazovym okhlazhdeniem, i primenenie ego dlya opredeleniya stepeni pogloshcheniya toriya; Experimento Critico Efectuado en un Reactor de Elevada Temperatura Refrigerado por Gas y su Aplicacion para Calcular los Indices de Absorcion del Torio

    Energy Technology Data Exchange (ETDEWEB)

    Bardes, R. G.; Brown, J. R.; Drake, M. K.; Fischer, P. U.; Pound, D. C.; Sampson, J. B.; Stewart, H. B. [General Dynamics Corporation,San Diego, CA (United States)

    1964-04-15

    . Daetsja opisanie izmerenija rezonansnogo integrala torija i ego zavisimosti ot temperatury. Pri jetom metode dlja izmerenija rezonansnogo zahvata v kachestve standarta ispol'zuetsja zoloto, a v kachestve materiala, dajushhego velichinu pogloshhenija, podchinjajushhujusja zakonu 1/v, -vanadij. Jetot metod obuslovlivaetsja tem faktom, chto torij dispergiruetsja v grafite i trudno primenjat' obychnyj metod kadmievogo otnoshenija. Sravnenie jeksperimental'nyh i teoreticheskih rezul'tatov svidetel'stvuet o prekrasnom soglasvi vo vsem diapazone peremennyh.. Krome togo, soglasujutsja rezul'taty izmerenija kojefficienta Dopplera kak metodom aktivacii, tak i metodom opredelenija reaktivnosti,-fakt, kotoryj, kak polagajut, javljaetsja vazhnym vvidu nalichija rashozhdenija mezhdu rezul'tatami primenenija jetih dvuh metodov, imejushhimisja v literature. (author)

  3. Movement of Radioactive Effluents in Natural Waters at Hanford; Le Mouvement des Effluents Radioactifs dans les Eaux Naturelles a Hanford; 0414 0412 0418 0416 0414 ; Movimiento de los Efluentes Radiactivos en Aguas Naturales en Hanford

    Energy Technology Data Exchange (ETDEWEB)

    Honstead, J. F.; Foster, R. F.; Bierschenk, W. H. [Hanford Laboratories Operation, Hanford Atomic Products Operation, General Electric Company, Richland, WA (United States)

    1960-07-01

    porod, prezhde chem dostignut podzemnyh vod. Bol'shinstvo radioaktivnyh materialov zaderzhivaetsja putem pogloshhenija ili drugih reakcij pri prohozhdenii cherez pochvu. Ochishhennaja takim obrazom voda i neznachitel'nye othody, dostigajushhie podzemnyh vod, napravljajutsja vmeste s nimi k reke Kolumbii. Skorost' i napravlenie opredeljajutsja formoj vodnogo gorizonta i gidravlicheskimi harakteristikami vodonosnyh plastov. Bol'shie ob{sup e}my vody, slivaemye v grunt, okazali korjonnoe izmenenie na harakter gorizonta podzemnyh vod. Ishodja iz izmerennoj pronicaemosti vodonosnyh plastov, srednee vremja prohozhdenija vody ocenivaetsja v 180 let. Priznaetsja takzhe to, chto maksimal'naja skorost' mozhet znachitel'no prevyshat' srednjuju velichinu. Odnako, vlijanie pogloshhenija ili drugih reakcij ochen' sil'no zamedljajut dvizhenie rastvorennogo materiala po otnosheniju k skorosti dvizhenija vody. Ne bylo obnaruzheno proniknovenija produktov delenija iz rajonov udalenija v rechnuju vodu. (author)

  4. Nuclear Materials Management in a Recovery Facility for Unirradiated Enriched Uranium; Gestion des Matieres Nucleaires dans une Installation de Recuperation d'Uranium Enrichi Non Irradie; Administrativno-khozyajstvennyj uchet yadernykh materialov na ustanovke po regeneratsii neobluchennogo obogashchennogo urana; Administracion de Materiales Nucleares en una Planta de Recuperacion para Uranio Enriquecido No Irradiado

    Energy Technology Data Exchange (ETDEWEB)

    Jasny, G. R. [Union Carbide Corporation, Oak Ridge, TN (United States)

    1966-02-15

    izvlekajutsja razlichnye vidy neobluchennogo obogashhennogo urana. V nastojashhee vremja usta- novka Y-12 po regeneracii osnashhena polunepreryvnoj potochnoj liniej, vkljuchaja rastvorenie, szhiganie, vyparivanie, izvlechenie, denitraciju i gidroflorinaciju produkta. Oborudovanie po pererabotke i hraneniju imeet ogranichennye razmery i obladaet obshhej propusknoj sposob- nost'ju v neskol'ko sot kilogrammov obogashhennogo urana v mesjac. Snabzhenie dlja processov izvlechenija postupaet kak s samoj ustanovki, tak i iz drugih predprijatij Komissii po atom- noj jenergii v Soedinennyh Shtatah. V tot ili inoj moment jeto snabzhenie vkljuchaet lom ne- obluchennogo obogashhennogo urana prakticheski vseh vozmozhnyh vidov. Fizicheskij kontrol' uspeshno osushhestvljaetsja blagodarja sledujushhim faktoram: 1. Tshhatel'nost' konstruirovanija oborudovanija, chto obespechivaet vozmozhnost' chistki i vyborki prob i svodit k minimumu zahvat materialov. 2. Nepreryvnyj dozimetricheskij kontrol' vseh othodov i putej prohozhdenija othodov i jeffluentov kak cherez sistemu kanalizacii, tak i cherez vytjazhnye truby, a takzhe nad radioak- tivno zagrjaznennym musorom. 3. Periodicheskie fizicheskie proverki nalichnyh materialov. 4. Tshhatel'naja vyborka prob i analiz ih kak po vneshnim putjam snabzhenija matermalami, tak i po putjam prohozhdenija produkta. 5. Strogij kontrol' nad kachestvom analiza i vyborki prob. 6. Vozlozhenie otvetstvennosti za uchet materialov na operativnyj, a ne na uchetnyj personal. 7. Tshhatel'nyj instruktazh operativnogo personala. Informacija, postupajushhaja v sistemu ucheta jadernyh materialov, sobiraetsja pri pomoshhi sistemy kartochek, blizko soprovozhdajushhih fizicheskij put' prohozhdenija materialov; inache govorja, tozhdestvo kazhdoj partii sohranjaetsja pri pomoshhi sootvetstvujushhej kartochki, i otdel pouch e tu jadernogo materiala uvedomljaetsja ob udalenii partii posredstvom peredachi emu sootvetstvujushhej kartochki jetoj partii. Bol'shaja chast' uchetnyh

  5. Non-Destructive Methods for Determining Burn-Up in Nuclear Fuel; Methodes Non Destructives d'Evaluation du Taux de Combustion dans le Combustible Nucleaire; Metody opredeleniya vygoraniya v yadernom toplive bez razrusheniya obraztsa; Metodos No Destructivos para Determinai el Grado de Combustion de los Elementos Combustibles Nucleares

    Energy Technology Data Exchange (ETDEWEB)

    McGonnagle, W. J. [Illinois Institute of Technology, Chicago, IL (United States)

    1966-02-15

    jadernyh reaktorah bez razrushenija obrazca javljajutsja poleznymi i zhelatel'nymi. Ideal'nym byl by metod, ne trebujushhij special'nyh dannyh o nejtronnom spektre, istorii radiacii ili vremeni ohlazhdenija. Obluchennye toplivnye jelementy sami po sebe javljajutsja nositeljami informacii o stepeni vygoranija topliva. Jeta informacija soderzhitsja v forme radioaktivnyh i stabil'nyh izotopov, obrazujushhihsja v processe delenija. K sozhaleniju,kak pri metodah analiza topliva bez razrushenija obrazca, tak i s razrusheniem obrazca nejtronnyj spektr, istorija radiacii i period ohlazhdenija vlijajut na jetu informaciju. Tochno tak zhe nedostatok tochnyh jadernyh dannyh, takih, kak znachenija jadernyh poperechnyh sechenij, vlijaet na ljubye vychislenija, kotorye mozhno bylo by proizvesti. Drugoj trudnost'ju pri analizah bez razrushenija obrazca javljaetsja nalichie polej vysokoj radiacii, kotoraja vnosit dopolnitel'nyj ''shum'' v fon pri izmerenijah. Razrabotka poleznyh i real'nyh standartov javljaetsja trudnym delom. Metody analiza stepeni vygoranija bez razrushenija obrazca osobenno polezny togda, kogda trebuetsja bystro i jekonomichno, dazhe pri sushhestvujushhem polozhenii s ih nedostatkom, poluchit' zhelatel'nuju tochnost' priblizitel'noj velichiny vygoranija. Ispol'zovalos' neskol'ko metodov dlja opredelenija stepeni vygoranija bez razrushenija obrazca; vedetsja ih ocenka ili oni predlagajutsja. Ispol'zovalis' razlichnye tipy spektrometrov, v tom chisle spektrometry s izognutym kristallom, magnitnyj komptonovskij spektrometr, komptonovskij spektrometr na sovpadenija i scintilljacionnyj spektrometr dlja analiza gamma-izluchenija radioaktivnogo materiala, obrazujushhegosja vo vremja processa delenija. Drugie metody analiza bez razrushenija obrazca vkljuchajut aktivaciju fol'gi, propuskanie nejtronov, aktivacionnyj analiz, izmerenie zahvata gamma-luchej i izmerenie mgnovennyh i zapazdyvajushhih nejtronov. Rassmatrivajutsja osnovnye principy kazhdogo iz vyshenazvannyh metodov i

  6. Study of Fluidized-Bed Control Rods; Etude de Barres de Controle Fluidisees; Izuchenie reguliruyushchej sistemy, ispol'zuyushchej suspenziyu pogloshchayushchikh chastits; Estudio Sobre Barras de Control de Lecho Fluidificado

    Energy Technology Data Exchange (ETDEWEB)

    Blair, D. J. [General Nuclear Engineering Corporation, Dunedin, FL (United States); Driscoll, M. J.; Dalton, G. R.; Parkinson, T. F. [Department of Nuclear Engineering, University of Florida, Gainesville, FL (United States)

    1964-06-15

    sistemu trub podobno sistemam upravlenija, razrabatyvaemym dlja reaktorov s suspenziej topliva. Nekotorye iz vozmozhnyh preimushhestv koncepcii SPCh: 1) ustranjaetsja bol'shinstvo vvodov v verhnjuju chast' korpusa i uproshhaetsja process peregruzki topliva; 2) pri vozniknovenij avarii v rezul'tate poteri potoka proishodit avtomaticheskaja bystraja ostanovka reaktora; 3) osevoe raspredelenie moshhnosti mozhet izmenjat'sja v rezul'tate primenenija special'nyh kanalov ili chastic peremennoj velichiny; 4) rezkoe vozrastanie potoka v vodjanom zazore mozhet byt' umen'sheno dlja chastichno izvlechennogo upravljajushhego sterzhnja; 5) mozhno umen'shit' temperaturnyj ''zapas'' reaktivnosti,esli sistema imeet otricatel'nyj temperaturnyj kojefficient; 6) rashody po izgotovleniju znachitel'no nizhe, chem dlja jelektromehanicheskih sistem. Provedena ocenka koncepcii SMCh, v tom chisle bylo osushhestvleno stroitel'stvo pro- totipnyh modelej i proverka gidravlicheskih i jadernyh harakteristik. Izuchalis' dva tipa: propuskajushhie ''sterzhni'' (tolshhina 2 srednih svbbodnyh probega) i otrazhajushhie ''sterzhni'' (tolshhina 4 srednih svobodnyh probega). Dlja oboih tipov mozhno poluchit' priemlimye gidravlicheskie i jadernye harakteristiki. Obosnovana vozmozhnost' upravlenija reaktorami nizkoj moshhnosti s pomoshh'ju propuskajushhih ili otrazhajushhih upravljajushhih ' sterzhnej''. Dalee bylo pokazano, chto SPCh obladajut horoshimi regulirujushhimi svojstvami, kotorye mozhno rasschitat' standartnymi metodami. V sluchae bol'shoj moshhnosti i vysokoj temperatury neobhodima dopolnitel'naja informacija otnositel'no harakteristik materiala chastic. Bol'shoe preimushhestvo SPCh zakljuchaetsja v vozmozhnosti formirovanija osevogo potoka libo putem ispol'zovanija chastic razlichnoj velichiny i pogloshhenija, libo zhe putem.sootvetstvujushhego formirovanija oblasti poperechnogo sechenija SPCh. (author)

  7. Nuclear Accident Dosimetry at Argonne National Laboratory; Dosimetrie dans les Cas d'Accidents Nucleaires au Laboratoire National d'Argonne; 0421 041b 0423 0416 0411 0410 0414 ; Dosimetria en Casos de Accidente Nuclear en el Laboratorio Nacional de Argonne

    Energy Technology Data Exchange (ETDEWEB)

    Anderson, L. L.; Duffy, T. L.; Sedlet, J.; O' Neil, D. P. [Argonne National Laboratory, Argonne, IL (United States)

    1965-06-15

    propuesto metodos para valorar el ftisforo-32 en materiales biologicos con el fin de obtener la dosis de neutrones rapidos, analizar los productos de activacion neutronica en las sustancias de que se compone el medio ambiente, y determinar el numero total de fisiones. El control administrativo de las operaciones dosimetricas se vera facilitado por el empleo de un manual que enumera el emplazamiento de los dosimetros, la manera de manejarlos y los procedimientos de recuento, e indica las formulas que se han de utilizar en el calculo de las dosis. (author) [Russian] V doklade obobshhaetsja problema tekushhego planirovanija v Argonskoj nacional'noj laboratorii v otnoshenii opredelenija dozy obluchenija posle avarijnoj kritichnosti. Obsuzhdenie svjazano v osnovnom s dvumja tipami izgotovljaemyh promyshlennost'ju kompaktnyh dozimetricheskih ustrojstJo i vkljuchaet rezul'taty provedennyh nezavisimo kolibrovanij, vypolnennyh v laboratorii. V pervichnuju dozimetricheskuju sistemu vkljuchajutsja porogovye detektory, razrabotannye v Okridzhskoj nacional'noj laboratorii dlja izmerenija spektrov nejtronov. Jeksperimental'no vyvedeny kalibrovochnye krivye raspada fol'gi iz deljashhegosja materiala dlja postojanno ispol'zuemogo v Argone scintilljacionnogo schetnogo oborudovanija. Jeto oborudovanie kalibrovano takzhe dlja opredelenija aktivnosti natrija-24 v krovi. Dozimetricheskie bloki razrabotannogo v laboratorii Savanna River tipa ispol'zujutsja v kachjostve vtorichnyh stancij. Dannye, postupajushhie ot komponentov jetih blokov, svjazannyh s aktivaciej nejtronami, budut ispol'zovat'sja dlja vnesenija izmenenij v nejtronnyj spektr dlja promezhutochnyh, a takzhe teplovyh znachenij jenergii. Zakadmievaja aktivacija mednoj fol'gi pri dannom znachenii nejtronov promezhutochnoj jenergii okazalas' sravnitel'no nechuvstvitel'noj k izmenenijam v nejtronnom spektre v jetoj oblasti. Byla opredelena znachimaja srednjaja velichina poperechnogo sechenija medi. Kojefficienty kalibrovanija schetchika

  8. Scanning Techniques for Brain-Tumour, Localization; Techniques Scintigraphies pour la Iocalisation des Tumeurs Cerebrales; Tekhnika skennirovaniya pri opredelenii lokalizatsii opukholej mozga; Tecnicas Centelleograficas para la Localizacion de Tumores Cerebrales

    Energy Technology Data Exchange (ETDEWEB)

    Duggan, M. H.; Brice, J.; Jones, E.; Mallard, J. R.; Myers, M. L. [Department Of Medical Physics, Postgraduate Medical School, Hammersmith Hospital, London (United Kingdom)

    1964-10-15

    facilitar la percepcion de anomalias no muy alejadas de los limites de deteccion en sistemas detectores moviles. En la memoria se estudia la posibilidad de utilizar analizadores multicanales para aplicar esas tecnicas y permitir al mismo tiempo un nuevo y util procedimiento de presentacion del centelleograma tanto en los sistemas moviles como en los estacionarios. (author) [Russian] Ustanovka dlja cvetnogo skennirovanija (Annotacija SM-51/25) ispol'zovalas' dlja sken- nirovanija dvuh vidov opuholej mozga: v odnom sluchae po pozitronnomu izlucheniju As{sup 74} , v drugom-po gamma-izlucheniju mechennogo J{sup 131} al'bumina s ispol'zovaniem fokusirujushhego kollimatora. Sravnivajutsja rezul'taty jetih dvuh vidov issledovanij. Mjet'jus,pri issledovanii opuholej u krys,pokazal, chto limonnokislyj Bi'uti javljaetsja osobenno udobnym materialom dlja opredelenija lokalizacii opuholej mozga, i v nastojashhee vremja provoditsja tret'ja serija klinicheskih issledovanij s primeneniem jetogo materiala, ispol'zovaniem gamma-detektirovanija i fokusirujushhego kollimatora. Privodjatsja predvaritel'nye rezul'taty jetih issledovanij . Fokusirujushhie kollimatory, primenennye vmeste s gamma-izluchajushhimi izotopami, imejut glubokij geometricheskij fokus; polucheny izoschetnye harakteristiki dlja tochechnyh istochnikov, ne zavisjashhie ot glubiny do 20sm. Jeksperimental'nye rezul'taty, poluchennye dlja celogo rjada kollimatorov, javilis' osnovoj dlja konstrukcii takih kollimatorov s zadannoj specifikaciej. Stacionarnoe detektornoe skennirovanie u bol'nyh s opuholjami mozga bylo provedeno s pomoshh'ju gamma-kamery s vosproizvodjashhim zapominajushhim ustrojstvom. Preimushhestva takoj apparatury zakljuchajutsja v bol'shej chuvstvitel'nosti i bolee bystroj vizualizacii kartiny raspredelenija radioaktivnosti, chto daet vozmozhnost' provedenija issledovanij v dinamike. K problemam, voznikajushhim v svjazi s jetoj apparaturoj, otnosjatsja trudnost' markirovki anatomicheskih struktur i

  9. Low-Level {beta} and {gamma} Counting in the Region 0-10 Disintegrations Per Minute; Comptage {beta} et {gamma} d'echantillons de faible activite (0 a 10 desintegrations par minute); Izmerenie {beta}- i {gamma}-izlucheniya maloj moshchnosti (0-10 raspadov v minutu); Recuento {beta} y {gamma} de muestras de baja actividad (0 a 10 desintegraciones por minuto)

    Energy Technology Data Exchange (ETDEWEB)

    Manov, George G [Tracerlab Inc. (United States)

    1960-06-15

    (antisovpadenij) dlya umen'sheniya fona. Izmereniya proizvodilis' s pomoshch'yu sleduyushchikh tipov schetchikov: a) toptsevym, b) tsilindricheskim, s) stsitillyatsionnym 4 {pi}. V dokumente udelyaetsya nekotoroe vnimanie trudnostyam polucheniya svobodnogo ot aktivnosti materiala, ispol'zuemogo dlya proizvodstva schetchikov. V nem privodyatsya dannye o materialakh s razlichnym soderzhaniem aktivnosti, kotorye mozhno svobodno priobresti. Nakoplenie takikh materialov, poluchennykh preimushchestvenn o eshche do vtoroj mirovoj vojny, bystro prevrashchaetsya v neobkhodimost'. Nadezhnost' ehlektronnoj sistemy yavlyaetsya neobkhodimoj dlya izmerenij izlucheniya maloj moshchnosti, v chastnosti, dlya togo, chtoby isklyuchit' podschet pobochnykh impul'sov. V dokumente daetsya opisanie sistemy, v kotoroj redkie impul'sy, posle izmereniya ikh skorosti, napravlyayutsya v ehlektronnuyu tsep', prokhodyat cherez usilitel' i vyvodyatsya cherez osnovnoj vykhodnoj kanal schetnogo mekhanizma. V osnovnom tranzistornaya skhema, vklyuchayushchaya predvaritel'noe usilenie i (ehlektro)pitanie , yavlyaetsya bolee udovletvoritel'noj, chem skhema, ispol'zuyushchaya vakuumnuyu lampu. (author)

  10. Special Nuclear Material Control by the Power Reactor Operator; Controle des Matieres Nucleaires Speciales par l'Exploitant d'une Centrale Nucleaire; Spetsial'nyj kontrol' nalichiya yadernykh materialov operatorom ehnergeticheskogo reaktora; Control de Materiales Nucleares Especiales por Parte de Quienes Operan el Reactor de Potencia

    Energy Technology Data Exchange (ETDEWEB)

    Cordin, R. A. [Yankee Atomic Electric Company, Boston, MA (United States)

    1966-02-15

    sushhestvovanija reaktorov nashi inzhenery i uchenye nepreryvno sovershenstvovali konstrukciju ustanovok i uluchshali metody jekspluatacii s cel'ju snizit' sebestoimost' s tem, chtoby nashi jadernye ustanovki mogli byt' konkurentosposoonymi s rabotajushhimi na iskopaemom toplive jelektrostancijami obychnogo tipa. Administrativnohozjajstvennyj uchet jadernyh materialov dolzhen byt' po mere vozmozhnosti sovremennym i jeffektivnym s tem, chtoby tehnologicheskij process, napravlennyj na snizhenie sebestoimosti, ne stradal by iz-za rastochenija jadernogo topliva i nebrezhnogo ego ucheta. Administrativno-hozjajstvennyj uchet trebuet so storony operatora jenergeticheskogo reaktora vedenija polnyh i podrobnyh uchetnyh dokumentov. Dlja udovletvorenija trebovanijam polnoty i nadezhnosti jeti dokumenty vovse ne dolzhny byt' slozhnymi. Naoborot, prostota ih javljaetsja chrezvychajno zhelatel'noj. Nesmotrja na to, chto jadernoe toplivo javljaetsja chem-to novym i sovershenno otlichnym ot topliva obychnogo tipa, nel'zja oblekat' ego pokrovom tainstvennosti. Kontrol' nalichija jadernyh materialov kak chast' administrativno-hozjajstvennogo ucheta jadernyh materialov ne ogranichivaetsja odnoj lish' rabotoj po proverke nalichija materialov, no on lezhit v osnove mnogih drugih vidov dejatel'nosti, javljajushhihsja neot{sup e}mlemoj chast'ju jekspluatacii ljubogo jenergeticheskogo reaktora, kak naprimer, otpravok obluchennogo topliva, pereobrabotki otrabotannogo topliva so svjazannoj s jetim otchetnost'ju pri regeneracii topliva i materiala, proizvedennogo pri rabote reaktora. K jetomu krugu problem otnosjatsja takzhe vyrabotka i osushhestvlenie nadlezhashhej programmy strahovanija. (author)

  11. Studies on radiation-image detectors; Etudes sur les detecteurs a images de rayonnements; Izuchenie detektorov izobrazheniya radiatsii; Estudios sobre detectores de radiaciones productores de imagenes

    Energy Technology Data Exchange (ETDEWEB)

    Reiffel, L [Armour Research Foundation, Chicago, IL (United States)

    1962-04-15

    }mkoj raspredeleniya iskr. Pri rabote s issledovatel'skim reaktorom Armor na rezhime maloj moshchnosti za desyat' MINUT byla zasnyata kartina raspredeleniya nejtronov po Laueh; pikovyj potok aktivnoj zony sostavlyal 10{sup 11} nv, a kollimator sostoyal iz pryamoj trubki diametrom 1 X 1 cm. Opisano primenenie ehtikh schetchikov dlya drugikh nejtronnykh issledovanij s ukazaniem nailuchshej dostizhimoj razreshayushchej sposobnosti, kotoraya mozhet byt' poluchena pri men'shikh rasstoyaniyakh mezhdu ehlektrodami, ispol'zovanii dinamicheskoj razvertki, a, vozmozhno, i pri prostranstvennom fil'trovanii opticheskogo izobrazheniya. Vtorym obshchim podkhodom k obnaruzheniyu izobrazheniya, vyzyvaemogo radiatsiej, yavlyaetsya ispol'zovanie v preobrazovatele lyuminestsiruyushchikh i fosforestsiruyushchikh ehkranov. V nastoyashchee vremya ispytyvayutsya matritsy lyuminestsiruyushchikh volokon, sostoyashchikh iz ves'ma tonkikh steklyannykh trubok, napolnennykh stsintillyatsionnoj zhidkost'yu. EHti matritsy oka- zyvayutsya poleznymi pri obnaruzhenii rentgenovskikh luchej i gamma-izluchenij; dlya polucheniya chuvstvitel'nosti k nejtronam MOGUT ''zaryazhat'sya'' libo materialy stenok, libo soderzhashchayasya vnutri trubok zhidkost'. BUDUT izlozheny novye metody vyrabotki lyuminestsiruyushchikh voloknistykh ehkranov razlichnogo tipa s ukazaniem ikh opticheskikh svojstv, chto takzhe tesno svyazano s tekhnologiej stsintillyatsionnykh kamer. BUDUT kratko obsuzhdeny vozmozhnosti postrojki vosproizvodyashchikh izobrazheniya detektorov s ispol'zovaniem tolstykh blokov materiala, sposobnykh khranit' znachitel'nyj zapas ehnergii i vyzyvat' fosforestsentsiyu pri ikh obluchenii; budut takzhe opisany metody otscheta pokazanij pri pomoshchi opticheskoj razvertki luchej dlya ustraneniya poter' v razreshayushchej sposobnosti iz-za konechnoj tolshchiny lyuminofora. (author)

  12. High-Volume Non-Destructive Test Applications at the Hanford Atomic Products Operation; Applications Industrielles des Essais Non Destructifs a l'Etablissement Nucleaire de Hanford; Provedenie bol'shogo chisla nedestruktivnykh ispytanii v ''khenford atomik prodakts opereishen''; Ensayos No Destructivos en Gran Escala Aplicados en Hanford

    Energy Technology Data Exchange (ETDEWEB)

    Worlton, D. C. [Pacific Northwest Laboratory, Battelle Memorial Institute, Richland, WA (United States)

    1965-10-15

    resultados obtenidos con este metodo de ensayo, que se ha aplicado en condiciones dificiles a 250 000 m de tuberia instalada. (author) [Russian] Bezopasnost' i jeffektivnost' kriticheskih processov Henforda garantiruetsja bystrym, nadezhnym i avtomaticheskim sposobom ispytanija obrazcov bez razrushenija obolochki. Vysokochuvstvitel'nye toki Fuko i ul'trazvuk nahodjat svoe obychnoe primenenie v jetoj oblasti i v processah izgotovlenija izdelij dlja togo, chtoby obespechit' maksimal'nuju garantiju kachestva bol'shih kolichestv materiala za mini- mal'nyj period vremeni. Opisyvajutsja sistemy, ispol'zuemye dlja togo, chtoby obespechit' kachestvennost' processov Henforda po izgotovleniju izdelij jadernogo topliva. Dejstvujushhie kak obychnoe oborudovanie jeti sistemy ispol'zujut izmerenija ul'trazvukovogo zatuhanija dlja togo, chtoby prokontrolirovat' strukturu zerna aktivnyh zon nejekranirovannogo uranovogo topliva, a ul'trazvukovoj metod i metod tokov Fuko dlja togo, chtoby obespechit' sootvetstvujushhuju po- losnost' i tolshhinu 0,040 djujma aljuminievogo pokrytija jelementov ' kassetah, i novyj shirokopolosnyj metod s vysokorazreshajushhej sposobnost'ju ul'trazvukovogo obsledovanija dlja obnaruzhenija defektov v svarnyh shvah na stykah obolochki. Ob{sup e}dinenie ispytanij s pomoshh'ju ul'trazvuka i tokov Fuko primenjaetsja odnovremenno dlja togo, chtoby provesti polnoe obsledovanie toplivnogo jelementa v devjatisekundnom cikle. Jelementy s defektom avtomaticheski udaljajutsja s potochnoj linii proizvodstva. Osobyj upor delaetsja na usovershenstvovannye metody ispytanij s pomoshh'ju ul'trazvuka po obsledovaniju tonkostennyh obolochnyh trub dlja toplivnyh jelementov. Ispol'zujutsja special'nye preryvateli s vysokoj fokusirovkoj vmeste s shirokopolosnoj shemoj dlja togo, chtoby poluchit' chistyj srez volny v trubah tolshhinoj 0,015 djujma. Prostejshie i bolee slozhnye volnovye dvizhenija iskljuchajutsja, poskol'ku rezul'taty ispytanij legko istolkovyvajutsja i vosproizvodjatsja

  13. Fast Plasma from a Coaxial Gun; Plasma Rapide Produit par un Canon Coaxial; Bystraya plazma iz koaksial'nogo inzhektora; Produccion de Plasma Rapido Mediante un Inyector Coaxial

    Energy Technology Data Exchange (ETDEWEB)

    Marshall, J.; Henins, I. [Los Alamos Scientific Laboratory, Los Alamos, NM (United States)

    1966-04-15

    . Vysokoe naprjazhenie, kotoroe uskorjaet bystrye dejtrony, uskorjaet takzhe iony materiala stenok, esli bystraja plazma bombardiruet stekljannuju stenku i isparjaet ee. (author)

  14. Molecular Dynamics Investigated by Neutron Scattering; Etude de la Dynamique Moleculaire au Moyen de la Diffusion des Neutrons; 0418 0421 0421 041b 0415 0414 041e 0412 0410 041d 0418 0415 041c 041e 041b 0415 041a 0423 041b 042f 0420 041d 041e 0419 0414 0418 041d 0410 041c 0418 041a 0418 0421 041f 041e 041c 041e 0429 042c 042e 0420 0410 0421 0421 0415 042f 041d 0418 042f 041d 0415 0419 0422 0420 041e 041d 041e 0412 ; Estudio de la Dinamica Molecular por Dispersion Neutronica

    Energy Technology Data Exchange (ETDEWEB)

    Janik, J. A. [Institute for Nuclear Physics, Cracow (Poland)

    1965-06-15

    }OClO{sub 4} sobre la base de experimentos de dispersion inelastica de neutrones. Los resultados obtenidos indican que la rotacion del grupo NH4 en el perclorato amonico es libre, incluso a temperaturas tan bajas como la del nitrogeno liquido. En lo que respecta al H{sub 3}OClO{sub 4}, se ha observado una vibracion torsional del grupo H{sub 3}O con una frecuencia de 497 cm{sup -1}. Por tanto, a pesar de la identidad de las redes cristalinas del NH{sub 4}CIO{sub 4} y del H{sub 3}OCIO{sub 4}, la dinamica de los grupos NH{sub 4} es diferente de la de los grupos H{sub 3}O. Los resultados se comparan con los obtenidos por espectroscopia Raman y resonancia magnetica nuclear. Por ultimo, se estudia una serie de sustancias desde el punto de vista de su dinamica molecular. (author) [Russian] Kratko rassmatrivaetsja polozhenie s voprosom o primenimosti teorii Krigera- Nel'kina i teorii Griffinga v otnoshenii gazov. Zatem na osnovanii jeksperimentov s zhidkim metanom kriticheski rassmatrivaetsja vopros o primenimosti koncepcii tenzora massy v otnoshenii molekul v kondensirovannom sostojanii. Ubeditel'nymi dovodami protiv primenenija teorii Krigera-Nel'kina v otnoshenii kondensirovannyh sostojanij javljajutsja: sdvig raspredelenija jenergii nejtronov posle rassejanija v storonu bolee vysokih jenergij i otsutstvie zavisimosti neuprugoj chasti ot ugla rassejanija. Sledujushhie razdely posvjashheny rotacionnoj dinamike ammonievyh grupp v soedinenijah ammonija. Bol'shaja chast' jeksperimental'nogo materiala rassmatrivaetsja v svjazi s galoidami ammonija, ishodja iz rezul'tatov jeksperimentov razlichnyh avtorov. Dlja nekotoryh veshhestv svoboda vrashhenija grupp NH{sub 4} poluchena na osnovanii izmerenija nejtronov, togda kak dlja nekotoryh drugih jeto vrashhenie perehodit v krutil'noe kolebanie. V jetom sluchae chastoty krutil'nyh kolebanij, poluchennye razlichnymi avtorami v rezul'tate izmerenija nejtronov, sravnivalis' s chastotami, poluchennymi s pomoshh'ju infrakrasnoj

  15. Calcination of Radioactive Waste in Molten Sulphur; Calcination de Dechets Radioactifs dans le Soufre Fondu; 041a 0410 041b 042c 0426 0418 041d 0418 0420 041e 0412 0410 041d 0418 0415 0420 0410 0414 0418 041e 0410 041a 0422 0418 0412 041d 042b 0425 041e 0422 0425 041e 0414 041e 0412 0412 0420 0410 0421 041f 041b 0410 0412 041b 0415 041d 041d 041e 0419 0421 0415 0420 0415 ; Calcinacion de Desechos Radiactivos en Azufre Fundido

    Energy Technology Data Exchange (ETDEWEB)

    Winsche, W. E.; Davis, Jr., M. W.; Goodlett, Jr., C. B.; Occhipinti, E. S.; Webster, D. S. [E.I. Du Pont de Nemours and Co., Aiken, SC (United States)

    1963-02-15

    odnogo - pjati chasov dlja udalenija sernoj kisloty i ostavshejsja vody i dlja dal'nejshego kvl'ninirovanija i vosstanovlenija himicheskih soedinenij v sbrosnom sernom shlamme. Na jetih stadijah rasplavlennaja sera sluzhit v kachestve teploprovodnoj sredy, prepjatstvuet uvlecheniju radioaktivnyh tverdyh chastic obrazujushhimisja parami i gazami, a takzhe uletuchivaniju radioaktivnogo rutenija ne dopuskaja obrazovanija chetyrehokiela. Laboratornye opyty s ispol'zovaniem v kachestve pitajushhego rastvora koncentrirovannyh othodov vysokoj aktivnosti (1.3 x 10{sup 9} {gamma} c/(min)(ml), 2.0M Al(N0{sub 3}){sub 3}, i 1.5M HNO{sub 3}) pokazali, chto na jetih stadijah processa vyhodjashhimi gazami uvlekaetsja priblizitel'no lish' odna chast' na 100 000 chastej aktivnosti, soderzhashhejsja v ishodnom produkte. Po okonchanii vysokotemperaturnoj obrabotki sbrosnoj sernyj shlamm ohlazhdaetsja do 120 Degree-Sign C - 150 Degree-Sign C i slivaetsja v emkosti dlja okonchatel'nogo hranenija, v kotoryh on zatverdevaet. Stojkost' zatverdevshego sbrosnogo sernogo olamma protiv vozdejstvija vody byla ispol'zovana v kachestve mery jeffektivnosti jetogo metoda obrabotki, hotja avtory ne otkazyvajutsja ot zashhity sistemy emkostej protiv vozdejstvija vody. Iz imitirujushhih rastvorov, soderzhashhih Al(NO{sub 3}){sub 3} jeili nitraty rastvorennoj nerzhavejushhej stali s indikatornymi kolichestvami radioaktivnogo stroncija i cezija, a takzhe iz koncentrirovannyh vysokoradioaktivnyh othodov, soderzhashhih Al(NO{sub 3}){sub 3}, byli izgotovleny nebol'shie cilindry otverzhdennogo shlamma. Jeti cilindry podvergalis' dlitel'nomu vozdejstviju vody. Skorost' vyshhelachivanija opredeljalas' iz rascheta polnogo udalenija materiala iz poverhnostnogo sloja. Posle pervonachal'nogo perioda (6-8 nedel'), kogda vyshhelachivanie proishodit sravnitel'no bystro, nabljudaemaja skorost' vyshhelachivanija sostavljala 0,25 - 0,50 mm v god. (author)

  16. Economic Criteria Applied to Nuclear Materials Management; Criteres Economiques Applicables a la Gestion des Matieres Nucleaires; Ehkonomicheskie kriterii, primenyaemye pri kontrole i uchete yadernykh materialov; Criterios Economicos Aplicados a la Administracion de Materiales Nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Shelley, W. J.; Kuehn, M. N. [Mallinckrodt Chemical Works, St. Charles, MS (United States)

    1966-02-15

    procedimientos, las tecnicas, el proceso de las operaciones y la forma en que el personal lleva a cabo su cometido. Esta atencion y la voluntad de corregir los. errores permitiran asegurar el equilibrio optimo de los costos y las necesidades. (author) [Russian] Kontrol' i uchet jadernyh materialov dolzhny vsegda igrat' vspomogatel'nuju rol' pri vypolnenii osnovnoj zadachi obrabotki jadernyh materialov, t.e. vyrabotki jenergii ili proizvodstva konechnyh produktov. V svjazi s jetim otvetstvennye za kontrol' i uchet jadernyh materialov dolzhny postojanno reagirovat' na nuzhdy, svjazannye s vypolneniem osnovnoj proizvodstvennoj zadachi, i prisposablivat' neobhodimye sistemy k jetomu processu s tem, chtoby osushhestvljat' kontrol' i uchet jadernyh materialov pri optimal'nyh zatratah. V svjazi s sistemoj kontrolja i ucheta jadernyh materialov neobhodimo tshhatel'no izuchat' rjad faktorov, kotorye vlijajut na ee stoimost'. Razrabotannaja sistema kontrolja dolzhna dopolnjat' proizvodstvennyj process, obespechivaja minimal'nye rashody na soderzhanie personala, analizy i minimal'nyj pereryv proizvodstvennogo processa. Sistema kontrolja dolzhna sochetat'sja s proizvodstvnnymi potrebnostjami dlja togo, chtoby poluchennaja kolichestvennaja informacija bystro postupala licam, osushhestvljajushhim kontrol' za rabotoj. Sistema registracii i vydachi svedenij dolzhna obespechivat' maksimum dopolnitel'nyh dannyh. Ona dolzhna byt' shodnoj s sistemami, kotorye ispol'zujut postavshhiki i potrebiteli, i davat', pri vozmozhnosti, dopolnitel'nuju informaciju, svjazannuju s partijami jadernogo materiala. Dannye,poluchaemye dlja kontrolja za jadernymi materialami, dolzhny byt' tol'ko takimi, kotorye neobhodimye celjah obespechenija togo, chtoby ne bylo nikakih znachitel'nyh poter', hishhenij, nezakonnogo prisvoenija ili ispol'zovanija ne po naznacheniju jadernyh materialov. Dopolnitel'nye dannye dolzhny podvergat'sja tochno takoj zhe neobhodimoj strogoj proverke, kotoroj podvergajutsja dannye

  17. The physics design of EBR-II; Physique du reacteur EBR-II; Fizicheskij raschet ehksperimental'nogo reaktora - razmnozhitelya EVR-II; Aspectos fisicos del reactor EBR-II

    Energy Technology Data Exchange (ETDEWEB)

    Loewenstein, W. B. [Argonne National Laboratory, Argonne, IL (United States)

    1962-03-15

    spetsifikatsiya razmerov aktivnoj zony reaktora i/ili obogashchenie topliva, znacheniya reaktivnosti dlya normal'nogo rezhima raboty i ostanovki reaktora, opredelenie rabochej temperatury i ehnergeticheskikh koehffitsientov reaktivnosti i raspredelenie ehnergii i potoka kak funktsii polozheniya v reaktore. Opisyvaetsya obshchaya problema ehkstrapolyatsii ot prostoj ideal'noj analiticheskoj ili ehksperimental'no j geometrii k fakticheskoj geksagonal'noj geometrii reaktora. YAdernye kharakteristiki, vklyuchaya vosproizvodstvo , fakticheskoj reaktornoj sistemy sravnivayutsya s yadernymi kharakteristikam i ideal'noj printsipial'noj reaktornoj sistemy. Povedenie reaktivnosti v techenie dlitel'nogo vremeni raboty i ehnergeticheskij rezhim zony vosproizvodstva reaktora opisyvayutsya v ramkakh predpolagaemogo toplivnogo tsikla i materiala zony vosproizvodstva. V doklade analiziruyutsya soobrazheniya po bezopasnosti, vklyuchaya normal'nye i anormal'nye skorosti prirosta reaktivnosti, posledstviya ozhidaemykh ehffektov reaktivnosti, osnovannye na fizicheskom povedenii splava topliva i struktury reaktora, a takzhe ehkstrapolyatsiya ehksperimentov, provedennykh na opytnom reaktore dlya izucheniya perekhodnykh protsessov TREAT, na reaktore EBR-II. Izuchaetsya problema rasplavleniya v aktivnoj zone reaktora EBR-II. (author)

  18. Studies of the Solid and Liquid Phases of HF, HCl and HBr by Slow-Neutron Inelastic Scattering; Etude des Phases Solide et Liquide de HF, HCl Et HBr par la Diffusion Inelastique des Neutrons Lents; 0418 0417 0423 0427 0415 041d 0418 0415 0422 0412 0415 0420 0414 042b 0425 0418 0416 0418 0414 041a 0418 0425 0424 0410 0417 HF, HCl I HBr 0421 041f 041e 041c 041e 0429 042c 042e 041d 0415 0423 041f 0420 0423 0413 041e 0413 041e 0420 0410 0421 0421 0415 042f 041d 0418 042f 041c 0415 0414 041b 0415 041d 041d 042b 0425 041d 0415 0419 0422 0420 041e 041d 041e 0412 ; Estudio de las Fases Solida y Liquida del HF, HCl Y HBr por Dispersion Inelastica de Neutrones Lentos

    Energy Technology Data Exchange (ETDEWEB)

    Boutin, H. [Picatinny Arsenal, Dover, NJ (United States); Brookhaven National Laboratory, Upton, NY (United States); Safford, G. J. [Brookhaven National Laboratory, Upton, NY (United States)

    1965-06-15

    ). Jeti izmerenija proizvodilis' s cel'ju sistematicheskogo izuchenija vlijanija uvelichenija otricatel'nogo jelektricheskogo zarjada i razmerov anionov na nizkochastotnye molekuljarnye dvizhenija kak v tverdoj, tak i v zhidkoj fazah. HF issledovalsja pervym, t.k. dannye difrakcii rentgenovskih luchej pokazyvali, chto v tverdom sostojanii on obrazuet dlinnye zigzagoobraznye cepi s vodorodnoj svjaz'ju. Spektry nejaronov, neuprugo rassejannyh ot zhidkoj i tverdoj faz HF, jasno pokazali vysokuju stepen' associacii, sushhestvujushhuju vo vsej zhidkoj faze blagodarja vodorodnoj svjazi. S cel'ju interpretacii dannye po HF byli sopostavleny s dannymi analogichnogo rassejanija ionov HF i H{sub 2}F{sub 3}{sup -}, kotorye imejut struktury, analogichnye tem sostavnym chastjam v HF, kotorye vkljuchajut zigzagoobraznye cepi s vodorodnoj svjaz'ju. Jeti dannye byli takzhe sopostavleny s rezul'tatami izmerenij s pomoshh'ju infrakrasnyh luchej i izmerenij po metodu Ramana na ionah HF Pound-Sign . Jeti sopostavlenija pozvolili otlichit' chastotnuju harakteristiku otdel'noj sostavnoj chasti ot chastotnoj harakteristiki vsej cepi i ot nizkochastotnyh kolebanij reshetki. Linija, nabljudavshajasja pri 0,067 jev, byla associirovana s chastotoj deformacii v{sub 2} gruppy F-N...F v tverdom HF, i byla ustanovlena ee svjaz' s analogichnymi chastotami v ionah H{sub 2}F{sub 3}{sup -} i HF{sub 2}{sup -} kak frakcii rasstojanija F-F. Krome togo, shirokij pik, otmechennyj pri 0,007 jev, byl pripisan vrashhatel'nomu dvizheniju sostavnoj chasti F -F vokrug svjazi F -F. Spektr zhidkogo HF takzhe budet rassmatrivat'sja s tochki zrenija jetih dvizhenij. Spektry zhidkogo NS1 (180 Degree-Sign K), faz I i III tverdogo NS1 (143 i 85 Degree-Sign K sootvetstvenno), zhidkogo NVg (193 Degree-Sign K) i faz I i II tverdogo NVg (153 i 103 Degree-Sign K sootvetstvenno) byli sopostavleny s vysheukazannymi dannymi dlja HF. Jeti spektry pokazyvajut eshhe bol'shuju slozhnost', chem u HF. Jeto mozhet byt' ob{sup j

  19. Applications of Fluorine-18 in Biological Studies with Special Reference to Bone and Thyroid Physiology; Emploi du Fluor-18 dans des Études Biologiques, Notamment sur la Physiologie des Os et de la Thyroïde; ИСПОЛЬЗОВАНИЕ ФТОРА-18 В БИОЛОГИЧЕСКИХ ИССЛЕДОВАНИЯХ С УДЕЛЕНИЕМ ОСОБОГО ВНИМАНИЯ ВОПРОСАМ ФИЗИОЛОГИИ КОСТЕЙ И ФИЗИОЛОГИИ ПИТОВИДНОЙ ЖЕЛЕЗЫ; Aplicaciones del Fluor-18 en Estudios Biologicos, con Especial Referencia a la Fisiologia del Esqueleto y de la Tiroides

    Energy Technology Data Exchange (ETDEWEB)

    Anbar, M. [Weizmann Institute of Science (Israel); IAEC Soreq Research Establishment, Rehovot (Israel)

    1963-03-15

    , chto fiziologicheskoe povedenie F{sup -} vo mnogom analogichno povedeniju kal'cija; okazalos', chto nakoplenie R {approx} v kostjah uvelichivaetsja pod vlijaniem vitamina D i teosterona, v to vremja kak kortizon i jestrogeny umen'shajut stepen' nakoplenija ftora. Pri vvedenii ftora v vide kationnogo kompleksa harakter ego raspredelenija v organizme izmenjalsja. Bylo ustanovleno, chto mechennye F{sup 18}YF{sup ++} i ZF{sup +3} podchinjajutsja pravilam raspredelenija ishodnyh kationov. Bylo pokazano, chto iony ftoroboratov nakaplivajutsja v shhitovidnoj zheleze v kolichestve, sravnimom s nakopleniem ionov ioda. Iony ftoroboratov ne vstupajut v kakie-libo organicheokie svjazi v shhitovidnoj zheleze, i ih pogloshhenie javljaetsja specificheskim pokazatelem funkcii stadii zahvata dlja zhelezy. Ftoroboraty, mechennye R1v primenjajutsja d.;ja reshenija razlichnyh problem fiziologii shhitovidnoj zhelezy. Pokazano, chto TSH umen'shaet pogloshhenie BF; v pervye neskol'ko chasov posle vvedenija i uvelichivaet cherez 24 chasa. BF{sub 4}{sup -} okazyval takoe zhe tormozjashhee dejstvie na process pogloshhenija joda, kak i zhelezo, med', cink, kadmij, ftoristme soedinenija, tiocianat i drugie ionm, chto ukazyvaet na narushenie' fazy zahvata. Pri provedenii analogichnoj serii opytov bylo obnaruzheno, chto soedinenija, soderzhashhie sul'fgidril'nye gruppy, ravno kak i iony azida, uvelichivajut zahvat vtoro- boratov, hotja i umen'shajut obshhee pogloshhenie joda. Dalee, bylo pokazano, chto v faze zahvata chuvstvitel'nost' k oblucheniju znachitel'no men'she, chem v stadijah obrazovanija i vydelenija tiroksina. Ftoroboraty, mechennye F{sup 18}, shiroko primenjalis' dlja opredelenija lokalizacii mozgovyh opuholej o pomoshh'ju napravlennogo skanniruhvcego ustrojstva na sovpadenijah, vvidu ogranichennoj pronicaeyooti Dlja jetih ionov nepovrezhdennogo gematojencefalicheskogo bar'era. Byod polucheny i primenjalis' v issledovanijah fiziologii kostej ftoroaromaticheskie komplekso- obrazuhhcie

  20. Shipment of Gross Quantities of Radiostrontium; Transport de Grandes Quantites de Radiostrontium; 0422 0420 0410 041d 0421 041f 041e 0420 0422 0418 0420 041e 0412 041a 0410 0411 041e 041b 042c 0428 0418 0425 041a 041e 041b 0418 0427 0415 0421 0422 0412 0420 0410 0414 0418 041e 0418 0417 041e 0422 041e 041f 041e 0412 ; Transporte de Grandes Cantidades de Radioestroncio

    Energy Technology Data Exchange (ETDEWEB)

    Zahn, L. L.; Smith, C. W.; Junkins, R. L. [Hanford Laboratories General Electric Co., Richland, WA (United States)

    1963-02-15

    vodosnabzhenija; pojetomu fizicheskie i himicheskie svojstva materiala, v kotoryj vveden transportiruemyj produkt, imejut bol'shoe znachenie. V avarijnyh sluchajah rassejanija dolgozhivushhih radioizotopov v naselennyh rajonah pridetsja proizvodit' shirokuju dezaktivaciju imushhestva i jevakuirovat' naselenie. Vvidu tjazhelyh posledstvij avarijnogo vybrosa radioaktivnogo veshhestva, hotja verojatnost' takih sluchaev i ne velika, bylo sochteno umestnym vvodit' objazatel'nye administrativnye mery kontrolja, chtoby preduprezhdat' takie avarii, a v sluchae, esli oni proizojdut - svodit' do minimuma ushherb ot nih. Ocenka ushherba ot podobnyh avarij vyjavila nekotorye oblasti, v kotoryh trebuetsja dal'nejshee uluchshenie uslovij transportirovki. V nastojashhee vremja vedutsja raboty po izyskaniju sposobov transportirovki, kotorye ne ugrozhajut zagrjazneniem produktov shirokogo potreblenija i obespechivajut bol'tuju ustojchivost' v avarijnyh uslovijah. Ispytyvajutsja na udar kontejnery obychnoj konstrukcii, i rezul'taty jetih ispytanij analizirujutsja dlja vyjavlenija optimal'nyh dannyh otnositel'no zhestkosti kontejnera i sootvetstvujushhej amortizacii v celjah povyshenija nadezhnosti konstrukcii. (author)

  1. Food Irradiation Research and Pilot Facilities in Operation or Planned in India; Recherches sur l'irradiation des Denrees Alimentaires et Installations Pilotes en Service ou a l'Etude en Inde; Izuchenie oblucheniya pishchevykh produktov' i dejstvuyushchie'i zaplanirovannye opytnye ustanovki v Indii; Irradiacion de Alimentos en la India: Investigaciones y Plantas Piloto en Servicio o en Proyecto

    Energy Technology Data Exchange (ETDEWEB)

    Kumta, U. S.; Sreenivasan, A. [Atomic Energy Establishment Trombay, Bombay (India)

    1966-11-15

    (40% vlazhnosti) pri komnatnoj temperature (25 - 28 Degree-Sign S) bolee chem do 150 dnej. Jetot process byl issledovan s tochki zrenija dopustimoj dozy obluchenija, sinergichnogo jeffekta sarbinovoj kisloty, uluchshenija kachestva v rezul'tate drugih vidov fizicheskoj i himicheskoj obrabotki i vida upakovochnogo materiala. Pojavlenie pleseni i nezhelatel'nyh zapahov okislenija u syra mozhet byt' zaderzhano primerno na 20 dnej pri komnatnoj temperature v rezul'tate obluchenija slabymi dozami (0,1 i 0,2 Mrad) i primenenija obertki, pokrytoj sarbinovoj kislotoj. Radiacionnoe povrezhdenie belkov ryby bylo izucheno s tochki zrenija stepeni ih rasshheplenija, skoplenija, jeffekta raskrytija i jelektroforeznoj podvizhnosti. Obnadezhivajushhie rezul'taty byli polucheny pri primenenii radiacii dlja dezinfesta- cii zerna i prodlenija sroka hranenija indijskogo hleba. Prodolzhaetsja izuchenie izmenenij sostava i pitatel'nosti obluchennoj pshenicy. Opisany sushhestvujushhie i zaplanirovannye ustanovki dlja obluchenija. Laboratorija obluchenija i obrabotki pishhevyh produktov, kotoraja budet gotova v skorom vremeni, budet imet' sbornyj obluchatel' s kobal'tom-60 (100 000 kjuri), portativnyj obluchatel' dlja zerna s kobal'tom-60 (28000 kjuri) i drugie ustanovki dlja obluchenija pishhevyh produktov, a takzhe analiticheskie i issledovatel'skie laboratorii. Predusmotrennaja proizvoditel'nost' sbornogo obluchatelja sostavljaet 100 funtov/chas pri doze. 0,5 Mrad, a portativnogo obluchatelja - 500 funtov/chas zerna pri doze 15 krad. (author)

  2. Perspectives for the Use of Ionizing Radiation in the Decontamination (Salmonella Radicidation) of Some Frozen Proteinaceous Foods and Dry Mixed Feed Ingredients; Perspectives de l'Emploi des Rayonnements pour la Decontamination (Radicidation de Salmonella) de Certains Aliments Proteiques Congeles et des Constituants de Melanges Alimentaires Secs pour Animaux; Perspektivy ispol'zovaniya ioniziruyushchego izlucheniya dlya unichtozheniya bakterij (Gruppy Salmonella) nekotorykh zamorozhennykh belkovykh osnovnykh pishchevykh produktov i sukhikh komponentov smeshannogo'fura; Radiodescontaminacion (Radicidacion de la Salmonella) de Algunos Alimentos Proteicos Basicos Congelados y de Componentes de Alimentos Secos para Animales

    Energy Technology Data Exchange (ETDEWEB)

    Mossel, D. A.A. [Central Institute for Nutrition and Food Research T.N.O., Zeist (Netherlands)

    1966-11-15

    escala comercial. (author) [Russian] Radiacionnaja dezaktivacija, osobenno belkovyh osnovnyh pishhevyh produktov nizkoj vodnoj aktivnosti, kak predstavljalos', dolzhna byla ispol'zovat'sja v kachestve odnogo iz pervyh primenenij ionizirujushhej jenergii v obrabotke pishhevyh produktov i furazha v silu a) ogranichennogo radiohimicheskogo povrezhdenija sootvetstvujushhih predmetov potreblenija; b) otsutstvija mikrobnoj proliferacii posle obluchenija; v) nekotoryh, chasto edinstvennyh v svoem rode, tehnologicheskih preimushhestv, kak, naprimer, primenimosti k uzhe upakovannym materialam, naprimer, k komponentam smeshannogo furazha, i jeffektivnoj dezaktivacii bez odnovremennoj poteri svezhesti, chto imeet mesto v sluchae s obychnym mjasom i mjasom domashnej pticy. V kachestve pervogo shaga byli provedeny laboratornye opyty po opredeleniju diapazona doz v jetoj oblasti odnovremenno s pochti maksimal'nym ispytaniem na sohranenie vkusovyh i pitatel'nyh kachestv. Poskol'ku rezul'taty jetih opytov javljalis' ves'ma obnadezhivajushhimi, byli provedeny opytnye ispytanija, hotja odnovremenno nauchnye issledovanija na sohranenie vkusovyh i pitatel'nyh kachestv byli prodleny na polnye dva goda, i prove- . deny opyty na treh pokolenijah krys. V hode jetih opytov bylo podtverzhdeno, chto doza porjadka 0,7{+-}0,1 megarad ves'ma dostatochna dlja udalenija salmonelly iz zamorozhennyh i zasushennyh belkovyh produktov, kak, naprimer, kurjatiny, rybnoj muki i smeshannogo furazha. Esli po prichinam analiticheskogo haraktera nuzhno bylo otdat' predpochtenie otricatel'nomu jenterobakterial'nomu ispytaniju dlja znachitel'nogo chisla obrazcov porjadka 10 g materiala, podvergnutogo dejstviju ionizirujushhego izluchenija, doza izluchenija dolzhna byla byt' neskol'ko uvelichena; strogaja maksimal'naja doza dolzhna sostavljat' v takom sluchae 1,0 megarad, naprimer, esli nuzhno obrabotat' smeshannyj furazh, pervonachal'no soderzhavshij bol'shoe chislo otnositel'no ustojchivyh k izlucheniju

  3. Legislation and Identification of Irradiated Foodstuffs; Reglementation et Identification des Denrees Irradiees; Zakonodatel'stvo po obluchennym pishchevym produktam i metody ikh identifikatsii; Legislacion y'Identificacion de los Alimentos Irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Lafontaine, A. [Institut d' Hygiene et d' Epidemiologie, Ministere de la Sante Publique, Bruxelles (Belgium)

    1966-11-15

    , mikrobiologija, izmenenie upakovochnogo materiala i izmenenie organolepticheskih svojstv. Do nastojashhego vremeni spektrofotometrija, hromatografija, jelektroforez, izmenenija potenciala okislitel'no-vosstanovitel'nogo processa i dozirovka nekotoryh okislov, po-vidimomu, javljajutsja naibolee obeshhajushhimi. Neobhodimo provedenie vazhnyh issledovanij s uchetom razlichnyh trebovanij: - metod dolzhen byt' po vozmozhnosti specificheskim, kachestvennym i, esli vozmozhno, kolichestvennym; - rezul'taty dolzhny vytekat' iz issledovanij, parallel'no vedushhihsja s obluchennymi produktami, s neobrabotannymi produktami i s produktami, sohranjaemymi drugimi sposobami; - issledovanija dolzhny provodit'sja v techenie takogo vremeni, kotoroe vozmozhno dlja obychnogo hranenija pishhevyh produktov do ih potreblenija, s tem, chtoby vyjasnit', sohranjajutsja, usilivajutsja ili ischezajut nabljudaemye v izvestnyh sluchajah modifikacii; - nakonec, metod dolzhen byt' po vozmozhnosti universal'nym, uchityvaja bol'shoe kolichestvo produktov, kotorye mogut byt' oblucheny, sposoby obluchenija i ispol'zuemye dozy. (author)

  4. Improved Techniques for Low-Flux Measurement of Prompt Neutron Lifetime, Conversion Ratio and Fast Spectra; Methodes Perfectionnees de Mesure de la Duree de Vie des Neutrons Instantanes, du Rapport de Conversion et des Spectres de Neutrons Rapides, dans un Reacteur a Bas Flux; Usovershenstvovannye metody izmereniya vremeni zhizni mgnovennykh nejtronov, koehffitsienta konversii i spektra bystrykh nejtronov pri slabykh potokakh nejtronov; Tecnicas Perfeccionadas para la Determinacion del Periodo de los Neutrones Inmediatos, la Razon de Conversion y los Espectros de Neutrones Rapidos, con Flujos Reducidos

    Energy Technology Data Exchange (ETDEWEB)

    Armani, R. J.; Bennett, E. F.; Brenner, M. W.; Bretscher, M. M.; Cohn, C. E.; Huber, R. J.; Kaufmann, S. G.; Redman, W. C. [Argonne National Laboratory, Argonne, IL (United States)

    1964-02-15

    'sov schet- chika kak funkcii vremeni zapazdyvanija i izmerenie otnositel'nogo otklonenija integralov vo vremeni potoka nejtronov kak funkcii integriruemogo vremeni, byli uluchsheny. Izu- cheny oblasti naibolee uspeshnogo primenenija razlichnyh metodov. Bylo udeleno takzhe vni- manie interpretacii rezul'tatov jetih izmenenij, i bylo pokazano, chto interpretacija na osnove prostoj kineticheskoj modeli primenima dlja shirokogo kruga konkretnyh sluchaev. Opisyvajutsja neskol'ko usovershenstvovanij nashego pervonachal'nogo aktivacionnogo metoda opredelenija otnoshenija obrazovanija k razrusheniju deljashhegosja veshhestva pri slabyh potokah nejtronov. Sjuda vhodit primenenie ochen' chuvstvitel'nyh radiohimicheskih metodov dlja proverki poluchennyh rezul'tatov; vnesenie popravok s cel'ju ucheta pomeh; primenenie fol'g razlichnoj stepeni obogashhenija dlja dobavlenija aktivnosti deljashhegosja materiala k aktivnosti produktov delenija; primenenie fol'g. obluchennyh nejtronami razlichnyh jenergij, dlja scheta delenij pri opredelenii zahvata; i ispol'zovanie scheta sovpadenij dlja obnaruzhenija raspada Np{sup 239}. Dlja poluchenija znachenija kojefficienta konversii po dannym aktivacii ne- obhodimo znat' otnoshenie kolichestva zahvatov k kolichestvu aktov delenija v toplive ({alpha}). V nastojashhee vremja ne sushhestvuet tochnogo jeksperimental'nogo metoda dlja izmerenija jetoj velichiny v reaktore so slabym potokom nejtronov; issledujutsja neskol'ko metodov, koto- rye, vozmozhno, pozvoljat opredelit' jetu velichinu. Opisyvajutsja dva ili tri perspektivnyh metoda. Usilija po sozdaniju nebol'shogo spektrometra bystryh nejtronov, imejushhego horoshuju stabil'nost', razreshajushhuju sposobnost' i chuvstvitel'nost' dlja izmerenija v reaktore spekt- ra nejtronov v oblasti jenegrii v desjatki i sotni kilovol't, byli sosredotocheny na prime- nenii analiza formy impul'sov dlja iskljuchenija vyzyvaemyh gamma-luchami javlenij v vodo- rodnyh proporcional'nyh schetchikah otdachi i na

  5. Radioisotopes and Radiation in Animal and Plant Insect Pest Control; Emploi des radioisotopes et des rayonnements dans la lutte contre les insectes nuisibles aux plantes et aux animaux; Ispol'zovanie radioizotopov i radiashchi v bor'be s nasekomymi-vreditelyami rastenij i zhivotnykh; Utilizacion de los radioisotopos y de las radiaciones en la lucha contra los insectos nocivos para las plantas y los animales

    Energy Technology Data Exchange (ETDEWEB)

    Andreev, S. V.; Martens, B. K.; Samojlova, V. A.; Molchanova, Z. I. [Vsesoyuznyj Institut Zashchity Rastenij, Leningrad, SSSR (Russian Federation)

    1963-09-15

    . Krome togo, metod daet vozmozhnost' issledovat' slozhnejshij kompleks voprosov parazitizma i khishchnichestva (voprosy izucheniya pishchevykh tsiklov promekhutochnogo pitaniya i khemataksisa). Primenenie metoda samomarkirovki polevykh gryzunov s pomoshch'yu radioaktivnykh primanok pozvolilo ustanovit' razmery pishchevykh arealov. Ispol'zovanie pestitsidov, sintezirovannykh o radioaktivnymi izotopami, v sochetanii s metodom radiokhromatografii, flyuorometrii i drugimi pozvolilo issledovat' slozhnejshie biokhimicheskie protsessy, protekayushchie v rasteniyakh i nasekomykh pod vliyaniem toksikantov. Na primere fosfornoorganicheskikh soedinenij tipa tiofosa i metafosa byla ustanovlena skorost' gidroliza ehtikh insektitsidov v zavisimosti ot fazy razvitiya rasteniya i ego fiziologicheskogo sostoyaniya, a takkhe uslovij vneshnej sredy. Opredelena dlitel'nost' sokhraneniya ostatochnykh kolichestv toksikantov na sel'skokhozyajstvennoj produktsii v zavisimosti ot srokov khimicheskikh obrabotok. S pomoshch'yu radioaktivnykh izotopov vyyavleny osobennosti metaboliticheskikh protsessov, ustojchivykh i neustojchivykh k gerbitsidam rastenij. Vnesenie v pestitsidy izotopov s korotkim periodom poluraspada v indikatornykh kolichestvakh daet vozmozhnost' proizvodit' otsenku kachestva obrabotki semennogo materiala i posevov sel'skokhozyajstvennykh rastenij pestitsidami pri ispol'zovanii razlichnykh sistem opryskivatelej, a takzhe opredelyat' optimal'nye normy ikh raskhoda. Putem vozdejstviya ioniziruyushchikh izluchenij na ehntomopatogennye mikroorganizmy (Beauverla basslana Unill.) dokazana vozmozhnost' povysit' ikh virulentnost' v tselyakh uluchsheniya mikrobiologicheskogo metoda bor'by s vrednymi nasekomymi. Sterilizutatsee i letal'noe dejstvie ionizirudtsikh izluchenij mozhet byt' ispol'zovano kak aktivnoe sredstvo bor'by s vrednymi nasekomymi. Primeneniem gamma radiatsii ustanovleny sterilizukhkhtsie dozy dlya ryada nasekomykh-vreditelej zapasov (Calandra granarla L., Acanthoscelides

  6. The Control of Fast Reactors: Current Methods and Future Prospects; Controle des Reacteurs a Neutrons Rapides. Methodes Actuelles et Perspectives d'Avenir; Upravlenie reaktorami na bystrykh nejtronakh. sushchestvuyushchie metody i dal'nejshie perspektivy; Control de Reactores Rapidos: Metodos Actuales y Perspectivas

    Energy Technology Data Exchange (ETDEWEB)

    Loewenstein, W. B. [Argonne National Laboratory, IL (United States)

    1964-06-15

    efectividad de los mecanismos de control han evolucionado desde evaluaciones poco precisas hasta calculos muy fidedignos confirmados experimentalmente en conjuntos criticos. El autor describe los resultados experimentales y las tecnicas analiticas, que suelen ser seguras. Los experimentos criticos que precedieron la construccion de los actuales modelos de reactores de neutrones rapidos comprendieron muchas investigaciones sobre la efectividad de sus mecanismos de control y experimentos marginales para sistemas perfeccionados en los que el cuerpo tiene un volumen mayor. El autor cita algunos estudios analiticos provisionales de los que se puede deducir que no habra necesidad de efectuar en lo sucesivo investigaciones experimentales detalladas en maquetas. (author) [Russian] Obsuzhdajutsja prakticheskie aspekty obespechenija sootvetstvujushhej reaktivnosti dlja upravlenija reaktorami na bystryh nejtronah, kotorye sushhestvenno otlichajutsja ot analogichnyh aspektov pri osushhestvlenii kontrolja sistem teplovyh nejtronov. Jeti razlichija vyzvany glavnym obrazom blagodarja nebol'shim sechenijam na bystryh nejtronah. V sistemah na bystryh nejtronah otsutstvujut sil'nye poglotiteli nejtronov. V rezul'tate jetogo takie sil'nye poglotiteli nejtronov v teplovyh reaktorah, kak produkty raspada (naprimer He i Zt)trebujut znachitel'no men'she reaktivnosti na ih kompensaciju, chem poterja reaktivnosti, vyzvannaja deleniem i zahvatom rasshhepljajushhihsja materialov. Poskol'ku atomnye sechenija bystrogo spektra dovol'no maly po sravneniju s sechenijami dlja teplovyh nejtronov atomnaja plotnost' materiala igraet vazhnuju rol' pri vybore materialov dlja regulirujushhih sterzhnej. Opisyvajutsja sushhestvujushhie tipy kontrol'nyh mehanizmov reaktorov na bystryh nejtronah. Jeti sposoby napravleny na vozmozhnost' ispol'zovanija, tam, gde jeto priemlemo,, kontrolja za utechkoj nejtronov. Kogda takoj kontrol' prakticheski neosushhestvim, to pri menjaetsja kontrol' s pomoshh'ju peredvizhenija

  7. Some Applications of Surface Barrier Solid-State Detectors for Alpha-Activity Detection and Measurement; Quelques Applications des Detecteurs a Semi-Conducteurs a Barriere de Surface pour Deceler et Mesurer l'Activite Alpha; Nekotorye vidy primeneniya detektorov tverdogo sostoyaniya s poverkhnostnym bar'erom dlya izmereniya i obnaruzheniya al'fa-aktivnosti; Aplicaciones de los Detectores de Semiconductores de Barrera Superficial a la Deteccion y Medicion de Emisores Alfa

    Energy Technology Data Exchange (ETDEWEB)

    Perry, K. E.G. [Atomic Energy Establishment, Winfrith, Dorset (United Kingdom)

    1965-10-15

    , chto oni ne reagirujut na gamma-luchi (po sravneniju s obychnymi scintilljacionnymi schetchikami, rabotajushhimi na sernistom cinke); jeto imeet bol'shoe znachenie dlja dozimetricheskogo kontrolja zagrjaznenija al'fa-izluchenijami v prisutstvii sil'nogo gamma-fona, naprimer pri obnaruzhenii materiala utechki iz radievyh igl ili radonovyh zeren. Daetsja podrobnoe opisanie jetih zondov. (author)

  8. Nuclear Materials Management in Relation to Safety and Criticality Control: A Study of Non-Inherently Safe Systems; La Gestion des Matieres Nucleaires dans ses Rapports avec la Securite et le Controle de la Criticite; Etude des Systemes a Securite Non Inherente; Obrashchenie s yadernymi materialami s uchetom bezopasnosti i kontrolya za kritichnost'yu. izuchenie sistem dopolnitel'noj avarijnoj zashchity; La Administracion de Materiales Nucleares y sus Relaciones con la Seguridad y el Control de la Criticidad; Estudio de los Sistemas de Seguridad No Inherente

    Energy Technology Data Exchange (ETDEWEB)

    Fruchard, Y. [Commissariat a l' Energie Atomique, Marcoule (France)

    1966-02-15

    fisionables. Por ultimo, conviene subrayar la importancia 'global' de las relaciones que existen entre la seguridad y la administracion de los materiales nucleares; en efecto, si esta administracion no constituye siempre la base del control 'primario' de la criticidad, sigue siendo indispensable a lo largo de todo un proceso, ya que la administracion de los materiales en una parte de la planta repercute en la seguridad de las partes vecinas, en particular de la destinada al tratamiento de los desechos. (author) [Russian] Proizvodstvo, ispol'zovanie i obrabotka nekotoryh deljashhihsja materialov predstavljajut bol'shuju opasnost', osobenno opasnost', svjazannuju s kritichnost'ju. Umenie inzhenera zakljuchaetsja v tom, chtoby izbezhat' jetu opasnost' s naimen'shej cenoj i ne meshaja slishkom rabote, svjazannoj s proizvodstvom ili pererabotkoj jadernyh materialov. Dlja ustranenija jetoj opasnosti sushhestvujut,na pervyj vzgljad, tri profilakticheskih metoda: ogranichenie koncentracii rastvorov, ogranichenie massy, tshhatel'nyj vybor geometrij. Tendencija sostoit v maksimal'nom ispol'zovanii tret'ego metoda, inache govorja, v rabote s sistemami dopolnitel'noj avarijnoj zashhity. Odnako na jadernyh ustanovkah imeetsja mnogo sistem dopolnitel'noj avarijnoj zashhity, i primenenie togo ili drugogo iz dvuh metodov stanovitsja neobhodimym. Jeti metody imejut otnoshenie k obrashheniju s jadernymi materialami. Na ustanovkah, gde rabotajut s nebol'shimi kolichestvami deljashhihsja materialov, zachastuju mozhno obespechit' jadernuju bezopasnost', dopuskaja dlja kazhdogo pomeshhenija takuju massu deljashhegosja materiala, kotoraja nizhe minimal'noj kriticheskoj massy. V otnoshenii bolee krupnyh ustanovok podobnyj kontrol', kotoryj polnost'ju osnovan na obrashhenii s materialami, stanovitsja nevozmozhnym. Izuchim, kak vygljadit svjaz' mezhdu obrashheniem i jadernoj bezopasnost'ju na zavode po obrabotke obluchennogo topliva vodnym metodom (toplivo na osnove prirodnogo urana). Takoj zavod