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Sample records for 3m cavilon sobre

  1. Evaluación in vivo mediante microscopia confocal del efecto protector de la película barrera no irritante 3M Cavilon sobre la piel perilesional In vivo evaluation using confocal microscopy of protective effect of no-sting barrier film 3M Cavilon on periwound skin

    Teresa Segovia Gómez

    2008-03-01

    Full Text Available Tradicionalmente, el manejo de las úlceras cutáneas incluye medidas que facilitan la cicatrización, tales como el buen desbridamiento, ya sea médico o quirúrgico, apósitos oclusivos, tratamiento de infección y buena nutrición; sin embargo, es importante la valoración y el tratamiento de la piel perilesional. En este sentido, recientemente, diversos autores han descrito la coexistencia de trastornos nutricionales y tróficos en la misma, muchos de ellos de causa iatrogénica, y donde el uso de la película barrera no irritante 3M Cavilon puede ser un pilar importante para una buena respuesta al tratamiento. Los objetivos que se persiguen con el presente estudio pretenden identificar las características confocales de la piel perilesional de las úlceras venosas y evaluar los cambios dinámicos que experimenta la misma tras el uso adyuvante de la película barrera no irritante 3M Cavilon en su tratamiento. Para ello, pacientes afectos con úlceras venosas de larga evolución fueron tratados durante una semana de manera convencional utilizando, además del material de cura, 3M Cavilon en una sección de la piel perilesional. La zona de piel perilesional en la que no se utilizó 3M Cavilon nos sirvió como control. Las úlceras fueron evaluadas por inspección visual, fotografía digital y microscopía confocal in vivo previa al uso de 3M Cavilon y a la semana de aplicación diaria del producto. Las úlceras demostraron una mejoría clínica. La evaluación con microscopía confocal de reflectancia evidenció importante mejoría histológica del área tratada con 3M Cavilon comparada con el área no tratada con este apósito. En el momento inicial del estudio, la piel perilesional demostró la presencia de áreas de necrosis epidérmicas, espongiosis, infiltración por células inflamatorias y vasodilatación prominente. Tras la semana de tratamiento, aunque todo el área de piel perilesional demostró mejoría, en el área tratada con 3M

  2. Synthesis and elecrophysical properties of superionic conductors Li3M2(PO4)3 (M = Fe, Sc, Cr)

    Detailed study of a new class of superionic conductors Li3M2(PO4)3 (M = Fe, Sc, Cr) is conducted. Optimal conditions of synthesis and growing of monocrystals of individual compounds and solid solutions are found. Electrophysical characteristics of the matrials obtained are investigated. Effect of isomorphous substitutions in Li3M2(PO4)3 structural type on electrophysical properties is studied. 18 refs.; 10 figs.; 6 tabs

  3. Fabrication and metrology study for M3M of TMT

    Luo, Xiao

    2014-09-01

    The M3M (Mirror 3 Mirror) of TMT (Thirty Meter Telescope) project is a3.5m×2.5m solid flat elliptical mirror. CIOMP is responsible for the fabrication of the M3M. A primary study on the fabrication and metrology is done in the past 2 years, and this paper introduces our work on the project. The fabrication strategy is based on large orbital tools and a plan combining with multiple measure methods is developed based on the requirement of M3M. A concept of dualsupporting system is also studied in the program to reduce the effect of gravity deformation.

  4. Advancement of neutron radiography technique in JRR-3M

    The JRR-3M thermal neutron radiography facility (JRR-3M TNRF) was completed in the JRR-3M of the Japan Atomic Energy Research Institute in 1991 and has been utilized as research tools for various kinds of research fields such as thermal hydraulic researches, agricultural researches, medical researches, archaeological researches and so on. High performance of the JRR-3M TNRF such as high neutron flux, high collimator ratio and wide radiographing field has enabled advanced researches and stimulated developments of advanced neutron radiography (NR) systems for higher spatial resolution and for higher temporal resolution. Static NR systems using neutron imaging plates or cooled CCD camera with high spatial resolution, a real-time NR system using a silicon intensifier target tube camera and a high-frame-rate NR system using a combination of an image intensifier and a high speed digital video camera with high temporal resolution have been developed to fill the requirements from researchers. (author)

  5. MISC_0_3M_CLR_2008

    Vermont Center for Geographic Information — This dataset (MISC_0_3M_CLR_2008) includes truecolor ortho imagery covering an area north and south of the VT/Canadian border. VCGI extracted the imagery from a...

  6. MISC_0_3M_CLR_2009

    Vermont Center for Geographic Information — This dataset (MISC_0_3M_CLR_2009)includes truecolor ortho imagery covering the Barre-Monteplier (Capital Region) of Vermont. VCGI reprojected the imagery from its...

  7. Peripheral plasma characteristics near LCMS in URAGAN-3M

    The study of peripheral plasma parameters and of physical processes in this plasma will enable in particular to find out the mechanisms responsible for particle and energy transport from the confinement volume. The investigating of main peripheral plasma parameters in the URAGAN-3M (U-3M) torsatron was carried out when the bulk plasma was produced and heated in ICR conditions. The radial density, electron temperature, and floating potential profiles near the last closed magnetic surface (LCMS) have been measured at the active stage of the discharge. In particular, the effect of RF fields on generation of an additional positive potential near the LCMS has been shown. 11 refs, 4 figs

  8. Piezoelectric gravitational antennas for use at 3 m 0K

    The design of a gravitational antenna consisting of a relatively large piezoelectric quartz crystal cooled to 3 m 0K is presented. Calculations show that the use of the piezoelectric output to detect signals results in a simplification of the apparatus with no loss in sensitivity as compared to that attainable with similar antennas employing magnetic-displacement detectors. For both types of antennas the sensitivity is considerably better than that required to detect thermal oscillations at 3 m 0K and compares favorably with that attainable with massive room-temperature antennas

  9. Stephen Hawking bags big new 3m physics prize

    Johnston, Hamish

    2013-01-01

    A massive 3m in prize money has gone to the British cosmologist Stephen Hawking for his work on black holes, quantum gravity and the early universe. The award is one of two "special fundamental physics prizes" from the Fundamental Physics Prize Foundation, which was set up earlier this year by the Russian physicist-turned-entrepreneur Yuri Milner.

  10. 76 FR 70443 - Decision on Waiver Application From 3M

    2011-11-14

    ... waiver request and requested public comment in the Federal Register issue of September 27, 2011 (76 FR... AGENCY Decision on Waiver Application From 3M AGENCY: Environmental Protection Agency (EPA). ACTION..., excluding legal holidays. The telephone number of the EPA/DC Public Reading Room is (202) 566-1744, and...

  11. Centralized radiation monitoring system for the JRR-3M

    This paper describes the outline of centralized radiation monitoring system for the JRR-3M and its functions such as the acquisition, the monitoring, the filing, the display and the statistical analysis of the data measured and the diagnostic program for the projection of the phenomena of the events to offer the measures needed. (author)

  12. Testing of the 3M Company Composite Conductor

    Stovall, John P [ORNL; Rizy, D Tom [ORNL; Kisner, Roger A [ORNL

    2010-10-01

    The 3M Company has developed a high-temperature low-sag conductor referred to as Aluminum-Conductor Composite-Reinforced or ACCR. The conductor uses an aluminum metal matrix material to replace the steel in conventional conductors. The objective of this work is to accelerate the commercial acceptance by electric utilities of this new conductor design by testing four representative conductor classes in controlled conditions. A unique facility called the Powerline Conductor Accelerated Testing (PCAT) Facility was built at ORNL for testing overhead conductors. The PCAT has been uniquely designed for testing overhead bare transmission line conductors at high currents and temperatures after they have been installed and tensioned to the manufacturer's specifications. The ability to operate a transmission line conductor in this manner does not exist elsewhere in the United States. Four classes of ACCR cable designed by the 3M Company have been successfully test at ORNL small, medium, large and small/compact. Based on these and other manufacturer tests, the 3M Company has successfully introduced the ACCR into the commercial market and has completed over twenty installations for utility companies.

  13. GAM observation in the TUMAN-3M tokamak

    Bulanin, V. V.; Askinazi, L. G.; Belokurov, A. A.; Kornev, V. A.; Lebedev, V.; Petrov, A. V.; Tukachinsky, A. S.; Vildjunas, M. I.; Wagner, F.; Yashin, A. Yu

    2016-04-01

    Results of an experimental study of geodesic acoustic modes (GAM) in the TUMAN-3M tokamak are reported. With Doppler backscattering (DBS) the basic properties of the GAM such as frequency, conditions for the GAM existence and the GAM radial location have been identified. The two-frequency Doppler reflectometer system was employed to reveal an interplay between low frequency sheared poloidal rotation, ambient turbulence level and the GAM intensity. Bicoherence analysis of the DBS data evidences the presence of a nonlinear interaction between the GAM and plasma turbulence.

  14. Alloying behavior of Ni3M-type GCP compounds

    The site preference of ternary additions in Ni3M-type GCP compounds was determined from the direction of solubility lobe of the GCP phase on the ternary phase diagram that have been experimentally reported. In Ni3Nb (D0a), Co and Cu preferred the substitution for Ni-site, Ti, V and W the substitution for Nb-site, and Fe the substitution for both sites. In Ni3V (D022), Co preferred the substitution for Ni-site, Cr the substitution for both sites, and Ti the substitution for V-site. In Ni3Ti (D024), Fe, Co, Cu, and Si preferred the substitution for Ni-site, Nb, Mo and V the substitution for Ti-site. The thermodynamic model, which was based on the change in total bonding energy of the host compound by a small addition of ternary solute, was applied to predict the site preference of ternary additions. The bond energy of each nearest neighbor pair used in the thermodynamic calculation was derived from the heat of compound formation by Miedema's formula. The agreement between the thermodynamic model and the result of the literature search was excellent. From both experimental and theoretical results, it was shown in three Ni3M-type GCP compounds that both transition and B-subgroup elements have two possibilities, i.e., the case of substitution for Ni-site or the case for M-site, depending on the relative value of two interaction energies.

  15. Hamline/3M Corp. Project: Liason for Curricular Change*

    Artz, Jerry L.

    2002-04-01

    This project was designed to catalyze curricular changes to better prepare students for the workplace. Industrial managers provided a list of 16 characteristics valued in the workplace; most were NOT related to science course content. The project formed 5 teams each including 3M professionals and students. Each team developed curricular changes in one of the 16 areas. Team goals were to improve skills in communication, data analysis, business/economics, team problem solving, and cultural competency. Curricular changes realized include communication skill activities embodied in science courses and faculty communication teaching skill seminars; self learning tools in data analysis, statistics and model building; a new course developed with assistance from 3M personnel focusing on topics directly related to technological industries; high performance team problem solving training/coaching for faculty; workshops for students and faculty relative to importance of cultural competencies in the workplace; and a new course focusing on culture, team problem solving and conflict resolution in the technical workplace. Process for developing and content of curricular changes will be reported. *Thanks to: NSF GOALI CHE-99010782

  16. Hamline/3M Project: Liaison for Curricular Change

    Rundquist, Andy

    2002-03-01

    This project was designed to catalyze curricular changes to better prepare students for the workplace. Industrial managers provided a list of 16 characteristics valued in the workplace: most were NOT related to science course content. The project formed 5 teams each including 3M professionals and students. Each team developed curricular changes in one of the 16 areas. Team goals were to improve skills in communication, data analysis, business/economics, team problem solving, and culture competency. Curricular changes realized include communication skill activities embodied in science courses and faculty communication teaching skill seminars, self learning tools in data analysis, statistics and model building, a new course developed with assistance from 3M personnel focussing on topics directly related to technological industries, high performance team problem solving training/coaching for faculty and workshops for students and faculty relative to importance of cultural competencies in the workplace, and a new course focusing on culture, team problem solving and conflict resolution in the technical workplace. Process for developing and content of curricular changes will be reported.

  17. Testing of the 3M Company ACCR Conductor

    Stovall, J.P.; RIzy, D.T.; Kisner, R.A.; Deve, H.E. (3M Comp.)

    2010-09-15

    The 3M Company has developed a high-temperature low-sag conductor referred to as Aluminum- Conductor Composite-Reinforced or ACCR. The conductor uses an aluminum metal matrix material to replace the steel in conventional conductors so the core has a lower density and higher conductivity. The objective of this work is to accelerate the commercial acceptance by electric utilities of these new conductor designs by testing four representative conductor classes in controlled conditions. Overhead transmission lines use bare aluminum conductor strands wrapped around a steel core strands to transmit electricity. The typical cable is referred to as aluminum-conductor steel-reinforced (ACSR). The outer strands are aluminum, chosen for its conductivity, low weight, and low cost. The center strand is of steel for the strength required to support the weight without stretching the aluminum due to its ductility. The power density of a transmission corridor has been directly increased by increasing the voltage level. Transmission voltages have increased from 115-kV to 765- kV over the past 80 years. In the United States, further increasing the voltage level is not feasible at this point in time, so in order to further increase the power density of a transmission corridor, conductor designs that increase the current carrying capability have been examined. One of the key limiting factors in the design of a transmission line is the conductor sag which determines the clearance of the conductor above ground or underlying structures needed for electrical safety. Increasing the current carrying capability of a conductor increases the joule heating in the conductor which increases the conductor sag. A conductor designed for high-temperature and lowsag operation requires an engineered modification of the conductor materials. To make an advanced cable, the 3M Company solution has been the development of a composite conductor consisting of Nextel ceramic fibers to replace the steel core and

  18. 3m Vacuum Ultraviolet Spectrometer with Optical Multichannel Detector

    This paper describes the design and the performance of a normal incidence vacuum ultraviolet spectrometer, for the 300-2400 A spectral range. It is provided with a multichannel detection system. The monochromator is original design and it has been built at CIEMAT. It is equipped with a 3 m concave holographic grating with 2400 grooves/mm. The multichannel detector consists of a windowless double microchannel plate / phosphor screen image intensifier, coupled by fiber optic to a 1024 elements self-scanning linear photodiode array. The output from the array is digitized by a 12-bit analog to digital converter and stored in a computer, for its later analysis. The necessary software to store and display data has been developed. (Author) 18 refs

  19. 3m vacuum ultraviolet spectrometer with optical multichanel detector

    This paper, describes the design and the performance of a normal incidence vacuum ultraviolet spectrometer, for the 300-2400 A spectral range. It is provided with a multichannel detection system. The monochromator is original design and it has been built at CIEMAT: It is equipped with a 3 m concave holographic grating with 2400 grooves/mm. The multichannel detector consists of a windowless double microchannel plate/phosphor screen image intensifier, coupled by fiber optic to a 1024 elements self-scanning linear photodiode array. The output from the arrays is digitized by a 12-bit analog to digital converter and stored in a computer for its later analysis. The necessary software to store and display data has been developed. (Author)

  20. The High Resolution Neutron Powder Diffractometer at JRR-3M

    Characteristics of the High Resolution Neutron Powder Diffractometer (HRPD) installed and studied recently at the JRR-3M are reported. The HRPD is an ILL-D2B type diffractometer and has features such as a fine collimation system: 6' - 20' - 6', two high take-off angles of monochromator and sixty four 3rd-collimator and detector systems placed at every 2.5 degree of diffraction angle. Typical diffraction pattern can be taken an the scattering angle from 5 to 160 degrees in about several hours depending on the sample material, and analyzed by the Rietveld profile refinement method or others. The best resolution is 0.2 degree at the focusing position which corresponds to 0.2 % in Δd/d. In a series of study of the high Tc superconductors, La2NiO4.00 was investigated between 610K and 6K. The crystal structure below 60K was determined to be orthorhombic and the magnetic moment of Ni2+ was evaluated to be about 1.5 μB at 80K and 1.7 μB at 6K through a Rietveld analysis. (author)

  1. Modification of the Simpson moduli space M_{3m+1}(P_2) by vector bundles (I)

    Iena, Oleksandr

    2010-01-01

    We consider the moduli space of stable vector bundles on curves embedded in P_2 with Hilbert polynomial 3m+1 and construct a compactification of this space by vector bundles. The result is a blow up of the Simpson moduli space M_{3m+1}(P_2).

  2. 3M3200型高效防尘口罩佩戴试验应用%3M3200 -efficiency dust masks to wear test application

    周和军

    2011-01-01

    为了做好煤矿职业危害作业场所防护,杜绝煤矿职业尘肺病发病率,提升职工个体防护用品,分三个月时间在协庄煤矿、翟镇煤矿两矿进行了3M3200型高效防尘口罩全员佩戴试验,通过抽样调查得出结论:3M3200型高效防尘口罩具有阻垂效果好、体积小、重量轻、佩戴方便等特点,可以推广应用。%In order to make coal workplace occupational hazard protection, to prevent the incidence of pneumoconiosis Oeupational , improve employee personal protection products, sub - three months in the co - Mine, Mine Zhaizhen coal were the two high - efficiency dust masks, 3M 3200 full wear test', a sample survey concluded by : 3 M 3200 High - efficiency dust masks, dust with effective resistance, small size, light weight, convenient to wear, can be popularized.

  3. Digital signage sobre IP

    Casademont Filella, Albert

    2012-01-01

    Projecte que versa sobre el disseny i la implementació d'un sistema de Digital Signage (Cartelleria Digital) sobre IP, creant un gestor que permeti controlar de forma remota tot un conjunt de petits dispositius connectats a pantalles que emeten continguts multimèdia com vídeos, imatges, feeds rss...

  4. CRM System Using PA-AKD Approach of D3M

    Ajay kumar

    2010-04-01

    Full Text Available In today’s business world, Customer Relationship Management has become conventional. Inspite of the unpredictable economy, CRM is being forced into corporate budgets and is believed to be the leading and initiative factor by many companies. The custom of CRM system has become mandatory. An adequate CRM system helps in acquiring new customers and increasing the value of existing customers. Datawarehouse acts as the data resource for D3M on CRM. This paper introduces the CRM based on PA-AKD and managing relationships with customers which has become the critical competition betweenorganizations. Then the structure of CRM is described with the help of D3M, discusses the procedure to Data warehouse and the significance of D3M applied to CRM. At the end, the promoting effects of D3M to individual service are presented

  5. Pengaruh Penerapan Sistem Informasi Akuntansi Terhadap Pengambilan Keputusan Pada Politeknik Unggul LP3M Medan

    Nasir, Miftah Faridh

    2014-01-01

    The purpose of this study was to determine how the analysis of the application of information systems in the management accounting can affect decision-making at the Polytechnic Unggul LP3M Medan and to determine the accounting information system to ensure accurate decision-making in a company. Primary data were collected by interviewing management and data documenting the Polytechnic Superior LP3M Medan. The analytical method used is descriptive. Hypothesis in this study is a significa...

  6. Minimum core configuration with IRT-3M fuel in the VR-1 reactor

    The present paper shortly describes advances of the RERTR program in the Czech Republic. The minimum core configuration B2 with 9 fuel elements IRT-3M and Beryllium reflector was performed on the training reactor VR-1 Sparrow. The paper presents results of reactor calculations and experimental measurements on the core configuration B2, their evaluation as well as the operation experiences with the Russian fuel assemblies IRT-3M on the reactor VR-1. (author)

  7. Sobre el Paisaje Cultural

    Hernández León, Juan Miguel

    2008-01-01

    El 4º Congreso Europeo sobre Investigación Arquitectónica y Urbana EURAU’08, organizado por la Escuela Técnica Superior de Arquitectura de la Universidad Politécnica de Madrid y dedicado a reflexionar sobre el “Paisaje cultural”, continúa la tarea de intercambio de conocimientos científicos y experiencias docentes entre las escuelas y facultades europeas de Arquitectura emprendida en las ediciones anteriores de Marsella, acerca de “La cuestión doctoral”, de Lille, sobre “El espacio considerad...

  8. Ultrafiltros sobre ω.

    Mancilla Hernández, Salvador

    2012-01-01

    El objetivo del presente trabajo estudiar los ideales y filtros sobre conjuntos numerables, los que comúnmente conocemos como filtros sobre ω o ideales sobre ω. Dentro de estos, nos enfocaremos en la clase de I-ultrafiltros los cuales fueron estudiados por James Baumgartner en [11]. Y dentro de esta clase de ultrafiltros, nos concentraremos cuando I es {A ⊆ ω : n∈A g(n) < ∞}, también conocido como ideal sumable con respecto a g, donde g es una sucesión de números reales no negativ...

  9. Syntheses, structures, optical properties, and electronic structures of KBaMSe3 (M = As, Sb)

    Graphical abstract: KBaMSe3 (M = As, Sb) are isostructural and crystallize in the centrosymmetric monoclinic space group P21/c with zero-dimensional structures containing totally isolated MSe3 (M = As, Sb) pyramids with K+ and Ba2+ cations lying between them. - Highlights: • Two new quaternary chalcogenides KBaMSe3 (M = As, Sb) were synthesized. • They are isostructural and crystallize in the centrosymmetric space group P21/c. • They adopt a zero-dimensional structure containing isolated MSe3 trigonal pyramids. • The optical band gaps are 2.26 (2) eV for KBaAsSe3 and 2.04 (2) eV for KBaSbSe3. • KBaMSe3 (M = As, Sb) are indirect band gap semiconductors. - Abstract: The first two members in the quaternary A/A′/M/Q (A = alkali metal; A′ = alkaline-earth metal; M = As, Sb, Bi; Q = S, Se, Te) system, namely the KBaMSe3 (M = As, Sb) selenides, have been synthesized by solid state reactions. They are isostructural and crystallize in the centrosymmetric space group P21/c of the monoclinic system. In the structure, the trivalent M atom (M = As, Sb) is coordinated to three Se atoms forming a trigonal pyramid with the Se atoms serving as the triangle base, showing the stereochemical activity of the ns2 lone pair electron. The MSe3 (M = As, Sb) trigonal pyramids are totally isolated from each other with K+ and Ba2+ cations located between them. The optical band gaps of 2.26 (2) eV for KBaAsSe3 and 2.04 (2) eV for KBaSbSe3, were deduced from the diffuse reflectance spectra. The first principles calculations were performed to study the electronic structures of KBaMSe3 (M = As, Sb) compounds and the results indicated that these two compounds are indirect band gap semiconductors

  10. 3M Tecra Listeria Visual Immunoassay: AOAC Official Methods 995.22 and 2002.09.

    Benesh, Deann L; Crowley, Erin S; Bird, Patrick M

    2013-01-01

    A validation study of the 3M Tecra Listeria Visual Immunoassay (VIA; 3M Food Safety, St. Paul, MN) was conducted at Q Laboratories, Inc., Cincinnati, OH. The 3M Tecra Listeria VIA method was compared to the Health Canada MFHPB-30 reference method for the analysis of five ready-to-eat (RTE) meats: deli turkey, hot dogs, liver pate, raw fermented sausage, and deli ham, and on a stainless steel environmental surface. Twenty replicates of each of the five food matrixes were analyzed at a low and a high inoculum level. The low-level test portions were inoculated with 0.2-2 CFU/25 g, and the high-level test portions with 2-5 CFU/25 g. In addition, 20 replicates of one environmental surface were analyzed at a low and a high inoculum level. The low-level sampling area was inoculated with 0.2-2 CFU/5 cm2, and the high-level area with 2-5 CFU/5 cm2. Five control replicates were also analyzed at 0 CFU/25 g (uninoculated) for the foods and at 0 CFU/5 cm2 for the environmental sampling area. There was no significant difference in the number of positives detected by the 3M Tecra Listeria VIA and the Health Canada MFHPB-30 reference method for four of the RTE meats and the stainless steel environmental surface analyzed in this study. For the raw, fermented sausage, there was a significant difference in the number of positives detected for the high inoculum level by the 3M Tecra Listeria VIA and the Health Canada MFHPB-30 reference method, with the 3M Tecra Listeria VIA method detecting more positives. PMID:23767342

  11. Marketingová strategie hasících kapalin Novec firmy 3M

    Peřina, Matěj

    2012-01-01

    This thesis is concerned with B2B market segmentation, situational analysis and proposes a markting strategy for Novec 1230 fire protection fluid marketed by 3M Česko. Firstly a marketing literature rewiev is carried out in order to uncover the most suitabe theoretical approaches to the subject at hand. Then the 3M Company and its Czech subsidiary are presented. In the methodological part there is a description of utilized methods and approaches. Data colection and analysis are executed in th...

  12. Creation of low density starting plasma with small frame antenna at Uragan-3M device

    Deficient shot-to-shot stability of Uragan-3M discharges makes difficult to reproduce experimental results over the period of experimental session. An efficient way of reducing difference between shots is creation of initial low density plasma before the main discharge to start up. A RF pre-ionization in the same frequency range as that of the main discharge is used in the Uragan-3M torsatron. The pre-ionization provides stable discharges during the whole experimental campaign. The main parameters of the pre-ionization plasma are measured and discussed

  13. Automatizacija praćenja rada relativnih gravimetara Scintrex Autograv CG-3M

    Repanić, Marija

    2013-01-01

    U radu je prikazano automatizirano praćenje rada relativnih gravimetara Scintrex Autograv CG-3M primjenom aplikacije Pragra, izrađene u programskom paketu MATLAB. Scintrex Autograv CG-3M je moderni relativni gravimetar. Nakon postavljanja gravimetra na točku, horizontiranja i pokretanja mjerenja, mjerni proces je potpuno automatiziran. Mjerni signal se već u gravimetru, na temelju definirane kalibracijske funkcije, pretvara u očitanja ubrzanja sile teže na koje se primjenjuju instrumentalne k...

  14. 3m Vacuum Ultraviolet Spectrometer with Optical Multichannel Detector; Espectrometro de ultravioleta de vacio de 3m provisto de sistema de deteccion optical multicanal

    Martin, P.; Peraza, C.; Blanco, F.; Campos, J.

    1993-07-01

    This paper describes the design and the performance of a normal incidence vacuum ultraviolet spectrometer, for the 300-2400 A spectral range. It is provided with a multichannel detection system. The monochromator is original design and it has been built at CIEMAT. It is equipped with a 3 m concave holographic grating with 2400 grooves/mm. The multichannel detector consists of a windowless double microchannel plate / phosphor screen image intensifier, coupled by fiber optic to a 1024 elements self-scanning linear photodiode array. The output from the array is digitized by a 12-bit analog to digital converter and stored in a computer, for its later analysis. The necessary software to store and display data has been developed. (Author) 18 refs.

  15. Efficient use of electric power in corporative 3M Mexico; Uso eficiente de la energia electrica en el corporativo 3M Mexico

    Sanchez Perez, Alfredo; Quinones Bonilla, Antonio S. [3M Mexico, S.A. de C.V. (Mexico); Bustos Antunez, Jorge I.; Reyes Arce, Manuel [Hines Interests, S.A. de C.V. (Mexico)

    2003-07-01

    It is not enough to count on with the state of the art technology for the daily operation of a building, the challenge is to be able to make a clear analysis and with attainable goals for the optimization of rational use of the electrical energy in the operation of intelligent buildings without affecting the comfort and productivity for users as well as the functionality and profitability for the owner. This went our base to carry out control strategies that helped the efficient use of the electrical energy, obtaining important savings without neglecting the operative part, of services and human within the property. It is thus, that 3M Mexico wanting to reach these purposes, conducted actions to improve the efficiency of the equipment in the following items: electric network, general lighting, air conditioning system, ventilation and extraction, hydropneumatic system, and sumps operation. [Spanish] No basta contar con la tecnologia de punta para la operacion diaria de un edificio, el reto es ser capaces de realizar un analisis claro y con metas alcanzables para la optimizacion de uso racional de la energia electrica en las operaciones de edificios inteligentes sin afectar el confort y productividad para usuarios asi como la funcionalidad y rentabilidad para el propietario. Esta fue nuestra base para llevar a cabo estrategias de control que ayudaron al uso eficiente de la energia electrica, obteniendo ahorros importantes sin descuidar la parte operativa, de servicios y humana dentro de la propiedad. Es asi, que 3M Mexico queriendo alcanzar dichos propositos, realizo acciones para mejorar la eficiencia de los equipos en los siguientes rubros: red electrica, iluminacion general, sistema de aire acondicionado, ventilacion y extraccion, sistema hidroneumatico, y operacion de carcamos.

  16. Study of neutron medical irradiation facility with supermirror neutron guide tube in JRR-3M

    A medical irradiation facility using a supermirror guide tube has been designed for boron neutron capture therapy (BNCT) treatment at the JRR-3M. Intense thermal neutrons are obtained with lower fast neutrons and gamma rays contamination at the end of neutron guide tube. It would be a most suitable neutron field for BNCT treatment. (author)

  17. CRM System Using CM-AKD Approach of D3M

    I.Kali Pradeep,

    2010-03-01

    Full Text Available In the present days, the Customer Relationship Management (CRM for short system has entered into the mainstream despite the uncertainty of the economy. CRM is being trust into corporate budgets and talked about as a critical initiative by various companies. CRM is an important edge in the business world. Building an effective CRM system can get more effectively in acquiring new customers, increasing value of existing customers and retaining good customers. At the same time, the data and data warehouse will offer the best dataresource for the application of Domain Drive Data Mining (D3M for short on CRM. The managing relationships with the customer have become a critical organizational competency. In this paper we introduce CRM with the advanced technologies for getting winning strategies. Later on, we introduce the architecture of CRM based on D3M. Which involves in designing the main steps of data warehouse and also it describes the managing of D3M applied to CRM. Finally, the promoting effects of D3M to individual services are presented.

  18. A DS106 Thing Happened on the Way to the 3M Tech Forum

    Lockridge, Rochelle; Levine, Alan; Funes, Mariana

    2014-01-01

    This case study illustrates how DS106, a computer science course in Digital Storytelling from the University of Mary Washington (UMW) and accessible as an open course on the web, is being explored in a corporate environment at 3M, an American multinational corporation based in St. Paul, Minnesota, to build community, collaboration, and more…

  19. miR-155 targets Caspase-3 mRNA in activated macrophages.

    De Santis, Rebecca; Liepelt, Anke; Mossanen, Jana C; Dueck, Anne; Simons, Nadine; Mohs, Antje; Trautwein, Christian; Meister, Gunter; Marx, Gernot; Ostareck-Lederer, Antje; Ostareck, Dirk H

    2016-01-01

    To secure the functionality of activated macrophages in the innate immune response, efficient life span control is required. Recognition of bacterial lipopolysaccharides (LPS) by toll-like receptor 4 (TLR4) induces downstream signaling pathways, which merge to induce the expression of cytokine genes and anti-apoptotic genes. MicroRNAs (miRNAs) have emerged as important inflammatory response modulators, but information about their functional impact on apoptosis is scarce. To identify miRNAs differentially expressed in response to LPS, cDNA libraries from untreated and LPS-activated murine macrophages were analyzed by deep sequencing and regulated miRNA expression was verified by Northern blotting and qPCR. Employing TargetScan(TM) we identified CASPASE-3 (CASP-3) mRNA that encodes a key player in apoptosis as potential target of LPS-induced miR-155. LPS-dependent primary macrophage activation revealed TLR4-mediated enhancement of miR-155 expression and CASP-3 mRNA reduction. Endogenous CASP-3 and cleaved CASP-3 protein declined in LPS-activated macrophages. Accumulation of miR-155 and CASP-3 mRNA in miRNA-induced silencing complexes (miRISC) was demonstrated by ARGONAUTE 2 (AGO2) immunoprecipitation. Importantly, specific antagomir transfection effectively reduced mature miR-155 and resulted in significantly elevated CASP-3 mRNA levels in activated macrophages. In vitro translation assays demonstrated that the target site in the CASP-3 mRNA 3'UTR mediates miR-155-dependent Luciferase reporter mRNA destabilization. Strikingly, Annexin V staining of macrophages transfected with antagomir-155 and stimulated with LPS prior to staurosporine (SSP) treatment implied that LPS-induced miR-155 prevents apoptosis through CASP-3 mRNA down-regulation. In conclusion, we report that miR-155-mediated CASP-3 mRNA destabilization in LPS-activated RAW 264.7 macrophages suppresses apoptosis, as a prerequisite to maintain their crucial function in inflammation. PMID:26574931

  20. Syntheses, structures, optical properties, and electronic structures of KBaMSe{sub 3} (M = As, Sb)

    Yin, Wenlong [Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China); Institute of Chemical Materials, China Academy of Engineering Physics, P.O. Box 919-306 Mianyang 621900 (China); Feng, Kai; Kang, Lei [Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China); University of the Chinese Academy of Sciences, Beijing 100049 (China); Kang, Bin; Deng, Jianguo [Institute of Chemical Materials, China Academy of Engineering Physics, P.O. Box 919-306 Mianyang 621900 (China); Lin, Zheshuai [Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China); Yao, Jiyong, E-mail: jyao@mail.ipc.ac.cn [Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China); Wu, Yicheng [Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)

    2014-12-25

    Graphical abstract: KBaMSe{sub 3} (M = As, Sb) are isostructural and crystallize in the centrosymmetric monoclinic space group P2{sub 1}/c with zero-dimensional structures containing totally isolated MSe{sub 3} (M = As, Sb) pyramids with K{sup +} and Ba{sup 2+} cations lying between them. - Highlights: • Two new quaternary chalcogenides KBaMSe{sub 3} (M = As, Sb) were synthesized. • They are isostructural and crystallize in the centrosymmetric space group P2{sub 1}/c. • They adopt a zero-dimensional structure containing isolated MSe{sub 3} trigonal pyramids. • The optical band gaps are 2.26 (2) eV for KBaAsSe{sub 3} and 2.04 (2) eV for KBaSbSe{sub 3}. • KBaMSe{sub 3} (M = As, Sb) are indirect band gap semiconductors. - Abstract: The first two members in the quaternary A/A′/M/Q (A = alkali metal; A′ = alkaline-earth metal; M = As, Sb, Bi; Q = S, Se, Te) system, namely the KBaMSe{sub 3} (M = As, Sb) selenides, have been synthesized by solid state reactions. They are isostructural and crystallize in the centrosymmetric space group P2{sub 1}/c of the monoclinic system. In the structure, the trivalent M atom (M = As, Sb) is coordinated to three Se atoms forming a trigonal pyramid with the Se atoms serving as the triangle base, showing the stereochemical activity of the ns{sup 2} lone pair electron. The MSe{sub 3} (M = As, Sb) trigonal pyramids are totally isolated from each other with K{sup +} and Ba{sup 2+} cations located between them. The optical band gaps of 2.26 (2) eV for KBaAsSe{sub 3} and 2.04 (2) eV for KBaSbSe{sub 3}, were deduced from the diffuse reflectance spectra. The first principles calculations were performed to study the electronic structures of KBaMSe{sub 3} (M = As, Sb) compounds and the results indicated that these two compounds are indirect band gap semiconductors.

  1. Assessment of zenith tropospheric delay derived from UNB3m model over Asia area

    Huang, Liangke; Xie, Shaofeng; Liu, Lilong; Feng, Haiyang; Jiang, Maofang

    2015-12-01

    The tropospheric delay is one of the main errors for earth observation and a variety of radio navigation technologies, and the UNB3m model can be used to calculate the zenith tropospheric delay (ZTD) without any real measured meteorological data, which taking the major changes in water vapor profiles with latitude into account, and it widely applied in Wide Area Augmentation System in America. However, there are few researches carried out on the assessment of ZTD from UNB3m model over Asia area. In this study, three years of the ZTD data observed from 56 IGS (International GNSS service) sites distributed in Asia area is used to assess the effectiveness and accuracy of ZTD calculated from UNB3m model. The results are: (1) relative to IGS observed ZTD, the bias and root mean square (RMS) for ZTD calculated from UNB3m model are -0.1 cm and 6.0 cm, respectively. Besides, the bias shows significant periodic characteristics in Asia area. (2) The bias and RMS present seasonal variations, which generally show larger values in summer months. (3) The precision of ZTD calculated from UNB3m model increases with increasing altitude or latitude, and also the bias and RMS show inconsistently in different Asia areas. At last, the best results can be achieved in inland area where presents the mean yearly RMS of 2.4 cm. These results provide a reference for the study of the tropospheric delay correction model and the applications of real-time GNSS navigation and positioning.

  2. Mitos sobre agroecologia.

    Canuto, João Carlos

    2011-01-01

    O presente ensaio vem a discutir alguns aspectos do discurso sobre a Agroecologia, procurando evidenciar contradições do senso comum, advindas seja de parte da comunidade leiga, dos meios de comunicação ou da comunidade científica. Coloca em debate alguns mitos sobre os sistemas agroecológicos, tais como: que sejam tecnologicamente retrógrados, de baixa produtividade, exigentes em mão-de-obra, economicamente inviáveis e “puramente ideológicos”.

  3. Inferencias sobre Grafos

    Sira M. Allende; Carlos N. Bouza

    2002-01-01

    El estudio de un juego puede ser modelado asumiendo que solo algunas partidas son observadas. Entonces el árbol del juego debe ser estimado utilizando información muestral. Similarmente ocurre al obtener información sobre el comportamiento de las decisiones tomadas por individuos muestreados sobre un árbol de decisión teórico. Al considerar una medida de probabilidad que caracterice el comportamiento de redes aleatorias se puede obtener un estimado del árbol asociado. Este problema es el anal...

  4. How to convert SPME into P3M. Lattice green functions and error estimates

    Complete text of publication follows. Particle-Mesh methods, such as Particle-Particle Particle-Mesh (P3M) and Smooth Particle Mesh Ewald (SPME), are efficient methods to compute long-range Coulomb (or gravitational) forces in simulations of many-particle systems. These methods reduce the complexity of computing O(N2) pairwise interactions into an O(N logN) problem by discretizing the charge density onto a mesh and by using Fast-Fourier-Transforms to calculate the electrostatic potential. Several variants of particle-mesh methods exist, characterized by different choices for some ingredients, in particular the charge assignment function used to map the particles onto the mesh, the lattice Green function used in the computation of the electrostatic potential, and the differentiation scheme used to calculate forces from the mesh-based potential. The accuracy of particle-mesh methods can also be enhanced by using mesh interlacing (or staggering). In the SPME method, forces are computed for example by using the analytical differentiation (AD) scheme, which uses the exact gradient of the charge assignment function, while forces are usually computed in a P3M algorithm by using finite differences, or by differentiating the potential in reciprocal space (multiplication by i∼k). The accuracy of the P3M method has been studied in depths using Fourier and signal analysis methods. That analysis allowed to optimize the accuracy of the P3M method via the use of an error minimizing lattice Green function, and also to have full control over the accuracy of the method thanks to an a priori error estimate. In this work, we show that a similar analysis can also be applied to the commonly used SPME method. This enables to convert straightforwardly an SPME method into the corresponding P3M method, which allows to improve slightly the accuracy of the algorithm by using the optimized P3M lattice Green function. As a by-product, that analysis yields also an a priori error estimate for

  5. Relevance of the ligand exchange rate and mechanism of fac-[(CO)3M(H2O)3]+ (M = Mn, Tc, Re) complexes for new radiopharmaceuticals.

    Grundler, Pascal V; Helm, Lothar; Alberto, Roger; Merbach, André E

    2006-12-11

    The water exchange process on fac-[(CO)3Mn(H2O)3]+ and fac-[(CO)3Tc(H2O)3]+ was kinetically investigated by 17O NMR as a function of the acidity, temperature, and pressure. Up to pH 6.3 and 4.4, respectively, the exchange rate is not affected by the acidity, thus demonstrating that the contribution of the monohydroxo species fac-[(CO)3M(OH)(H2O)2] is not significant, which correlates well with a higher pKa for these complexes compared to the homologue fac-[(CO)3Re(H2O)3]+ complex. The water exchange rate K298ex/s(-1) (DeltaHex double dagger/kJ mol(-1); DeltaSex double dagger/J mol(-1) K(-1); DeltaV double dagger/cm3 mol-1) decreases down group 7 from Mn to Tc and Re: 23 (72.5; +24.4; +7.1) > 0.49 (78.3; +11.7; +3.8) > 5.4 x 10(-3) (90.3; +14.5; -). For the Mn complex only, an O exchange on the carbonyl ligand could be measured (K338co = 4.3 x 10(-6) s(-1)), which is several orders of magnitude slower than the water exchange. In the case of the Tc complex, the coupling between 17O (I = 5/2) and 99Tc (I = 9/2) nuclear spins has been observed (1J99Tc,17O = 80 +/- 5 Hz). The substitution of water in fac-[(CO)3M(H2O)3]+ by dimethyl sulfide (DMS) is slightly faster than that by CH3CN: 3 times faster for Mn, 1.5 times faster for Tc, and 1.2 times faster for Re. The pressure dependence behavior is different for Mn and Re. For Mn, the change in volume to reach the transition state is always clearly positive (water exchange, CH3CN, DMS), indicating an Id mechanism. In the case of Re, an Id/Ia changeover is assigned on the basis of reaction profiles with a strong volume maximum for pyrazine and a minimum for DMS as the entering ligand. PMID:17140248

  6. Local IGFBP-3 mRNA expression, apoptosis and risk of colorectal adenomas

    Omofoye Oluwaseun

    2008-05-01

    Full Text Available Abstract Background IGF binding protein-3 (IGFBP-3 regulates the bioavailability of insulin-like growth factors I and II, and has both anti-proliferative and pro-apoptotic properties. Elevated plasma IGFBP-3 has been associated with reduced risk of colorectal cancer (CRC, but the role of tissue IGFBP-3 is not well defined. We evaluated the association between tissue or plasma IGFBP-3 and risk of colorectal adenomas or low apoptosis. Methods Subjects were consenting patients who underwent a clinically indicated colonoscopy at UNC Hospitals and provided information on diet and lifestyle. IGFBP-3 mRNA in normal colon was assessed by real time RT-PCR. Plasma IGFBP-3 was measured by ELISA and apoptosis was determined by morphology on H & E slides. Logistic regression was used to compute odds ratio (OR and 95% confidence intervals. Results We observed a modest correlation between plasma IGFBP-3 and tissue IGFBP-3 expression (p = 0.007. There was no significant association between plasma IGFBP-3 and adenomas or apoptosis. Tissue IGFBP-3 mRNA expression was significantly lower in cases than controls. Subjects in the lowest three quartiles of tissue IGFBP-3 gene expression were more likely to have adenomas. Consistent with previous reports, low apoptosis was significantly associated with increased risk of adenomas (p = 0.003. Surprisingly, local IGFBP-3 mRNA expression was inversely associated with apoptosis. Conclusion Low expression of IGFBP-3 mRNA in normal colonic mucosa predicts increased risk of adenomas. Our findings suggest that local IGFBP-3 in the colon may directly increase adenoma risk but IGFBP-3 may act through a pathway other than apoptosis to influence adenoma risk.

  7. IGFBP3 mRNA expression in benign and malignant breast tumors

    Ren, Zefang; Shin, Aesun; Cai, Qiuyin; Shu, Xiao-Ou; Gao, Yu-Tang; Zheng, Wei

    2007-01-01

    Introduction Most previous studies have focused on evaluating the association between circulating insulin-like growth factor binding protein 3 (IGFBP-3) levels and breast cancer risk. Emerging evidence over the past few years suggests that IGFBP-3 may act directly on mammary epithelial cells. Methods To understand the role of IGFBP-3 in breast tumorigenesis, we investigated IGFBP3 mRNA expression levels in benign and malignant breast tumors and their adjacent normal tissues using real-time qu...

  8. El servicio edición digital en la UC3M

    Aguilera Ortega, Raúl; Sotoca, Blanca

    2009-01-01

    En esta comunicación se presenta el Servicio de Edición Digital (SED) de la Universidad Carlos III de Madrid. SED es el encargado de gestionar la producción y difusión de ediciones digitales, bajo demanda, de revistas y libros generados en el transcurso de la actividad científica y de investigación de los miembros de la Comunidad Universitaria de la UC3M.

  9. Modified Foxp3 mRNA protects against asthma through an IL-10 dependent mechanism

    Mays, Lauren E.; Ammon-Treiber, Susanne; Mothes, Benedikt; Alkhaled, Mohammed; Rottenberger, Jennifer; Müller-Hermelink, Eva Sophie; Grimm, Melanie; Mezger, Markus; Beer-Hammer, Sandra; von Stebut, Esther; Rieber, Nikolaus; Nürnberg, Bernd; Schwab, Matthias; Handgretinger, Rupert; Idzko, Marco

    2013-01-01

    Chemically modified mRNA is capable of inducing therapeutic levels of protein expression while circumventing the threat of genomic integration often associated with viral vectors. We utilized this novel therapeutic tool to express the regulatory T cell transcription factor, FOXP3, in a time- and site-specific fashion in murine lung, in order to prevent allergic asthma in vivo. We show that modified Foxp3 mRNA rebalanced pulmonary T helper cell responses and protected from allergen-induced tis...

  10. Local IGFBP-3 mRNA expression, apoptosis and risk of colorectal adenomas

    IGF binding protein-3 (IGFBP-3) regulates the bioavailability of insulin-like growth factors I and II, and has both anti-proliferative and pro-apoptotic properties. Elevated plasma IGFBP-3 has been associated with reduced risk of colorectal cancer (CRC), but the role of tissue IGFBP-3 is not well defined. We evaluated the association between tissue or plasma IGFBP-3 and risk of colorectal adenomas or low apoptosis. Subjects were consenting patients who underwent a clinically indicated colonoscopy at UNC Hospitals and provided information on diet and lifestyle. IGFBP-3 mRNA in normal colon was assessed by real time RT-PCR. Plasma IGFBP-3 was measured by ELISA and apoptosis was determined by morphology on H & E slides. Logistic regression was used to compute odds ratio (OR) and 95% confidence intervals. We observed a modest correlation between plasma IGFBP-3 and tissue IGFBP-3 expression (p = 0.007). There was no significant association between plasma IGFBP-3 and adenomas or apoptosis. Tissue IGFBP-3 mRNA expression was significantly lower in cases than controls. Subjects in the lowest three quartiles of tissue IGFBP-3 gene expression were more likely to have adenomas. Consistent with previous reports, low apoptosis was significantly associated with increased risk of adenomas (p = 0.003). Surprisingly, local IGFBP-3 mRNA expression was inversely associated with apoptosis. Low expression of IGFBP-3 mRNA in normal colonic mucosa predicts increased risk of adenomas. Our findings suggest that local IGFBP-3 in the colon may directly increase adenoma risk but IGFBP-3 may act through a pathway other than apoptosis to influence adenoma risk

  11. Ultra Barrier Topsheet Film for Flexible Photovoltaics with 3M Company

    Funkenbusch, Arnold W. [3M Company, Saint Paul, MN (United States); Charles, Ruth P. [3M Company, Saint Paul, MN (United States)

    2014-12-30

    In this DOE sponsored program, 3M achieved the critical UBT features to enable durable flexible high efficiency modules to be produced by a range of customers who have now certified the 3M UBT and are actively developing said flexible modules. The specific objectives and accomplishments of the work under this program were; Scale-up the current Generation-1 UBT from 12” width, as made on 3M’s pilot line, to 1+meter width full-scale manufacturing, while maintaining baseline performance metrics (see table below); This objective was fully met; Validate service life of Generation-1 UBT for the 25+ year lifetime demanded by the photovoltaic market; Aggressive testing revealed potential failure modes in the Gen 1 UBT. Deficiencies were identified and corrective action taken in the Gen 2 UBT; Develop a Generation-2 UBT on the pilot line, targeting improved performance relative to baseline, including higher %T (percent transmission), lower water vapor transmission rate (WVTR) with targets based on what the technology needs for 25 year lifetime, proven lifetime of 25 years in solar module construction in the field, and lower cost; Testing of UBT Gen 2 under a wide range of conditions presented in this report failed to reveal any failure mode. Therefore UBT Gen 2 is known to be highly durable. 3M will continue to test towards statistically validating a 25 year lifetime under 3M funding; Transfer Generation-2 UBT from the pilot line to the full-scale manufacturing line within three years; and This objective was fully met.

  12. First results of multichord soft x-ray detection array on the U-3m torsatron

    A miniature pinhole camera array for spatially and temporally resolved measurements of soft X-ray plasma emission has been recently installed on the U-3M. The diagnostics has been tested in different types of the U-3M discharge. In low density frame antenna discharges with so-called ''H-like'' transition a fast SXR emission profile modification is observed. A phase shift of the SXR perturbation induced by the transition as well as different shapes of the perturbation is observed in different channels. The transition can be associated with MHD instability. Different shapes of the SXR emission profile has been observed in different discharge conditions. The SXR array is en excellent tool for study different types of the MHD activity. Different types of the low frequency MHD activity have been observed in the U-3M torsatron. The recently installed SXR diagnostics opens opportunity of detailed studies of the MHD activity together with its driver - the plasma pressure gradient. In the paper we are presented recent experimental results obtained with the use of SXP, without deep analysis these experiments

  13. Localization of orphan receptor TR3 mRNA in early developmental follicles in rat

    2000-01-01

    By in situ hybridization, the localization of orphan receptor TR3 mRNA has been observed in early developmental follicles. TR3 mRNA is first expressed in the ovarian interstitial cells on day 2 after birth, and then in granulosa cells (GC) in primary follicles on day 4. The expression level of TR3 mRNA in GC increases following the follicular development. Its higher expression can be observed in the outer layer of GC and inner layer of theca cells (TC) on day 6, where the cells present active proliferation and differentiation. The expression of TR3 is in an increasing manner until the large antral follicles on day 30. The mRNA is only expressed in the healthy, but not atretic follicles in adult rat ovaries. Injection of epidermal growth factor (EGF) has dramatically enhanced its expression in the early stage of developmental follicles. It is therefore suggested that TR3 may play a role in regulating growth and differentiation of ovarian somatic cells in the early stage, and its expression is regulated by EGF.

  14. Customer Relationship Management System with USCM-AKD Approach of D3M

    Ch. Raja Ramesh

    2010-09-01

    Full Text Available Customer Relationship Management (CRM for short System emerged in the last decade to reflect the central role of the customer for the strategic positioning of a company. One of the most significant changes in the practice of marketing during the last decade is the shift in emphasis from a transaction orientation customer to the CRM. Now a day’s it is an important edge but now a necessary tool for survival. CRM competence is very important source for enterprises to build and sustain competitive advantage. With the extensive applications in CRM enterprises have plenty of customer data. Main view of CRM is customer understanding, which is properly done will helps to understand customers and thus increases customer life time value. Effectively build CRM will maintain good relationships with customers. Companies have invested or are planning to invest huge amounts to implement CRM strategies, tools and infrastructures inorder to attract and retain profitable customers in today’s increasingly competitive markets. This paper introduces the architecture of RM based on Domain Driven Data Mining (D3M for short and with advanced technologies for knowing winning strategies. Italso discusses the important steps of designing the data warehouseand describes the meaning of D3M applied to the CRM and finally evolving of D3M to individual service are presented.

  15. ICRF plasma production and heating in the URAGAN-3M torsatron

    The results of experimental and theoretical studies of Alfven wave production and heating of plasma in the frequency range below the ion cyclotron frequency (ω0 ci) are presented. Several types of antenna have been studied for plasma RF production and heating in the URAGAN-3M torsatron (R = 100 cm, apl ≤ 12.5 cm, B ≤ 1.3 T): A frame type antenna (FTA) conventionally used for plasma RF production and heating with the best operational properties at low and moderate plasma densities (n-bare ≤ 5 x 1012 cm-3); compact three-half-turn antenna (THTA) proposed for plasma heating and density ramp up (up to 3 x 1013 cm-3) after the low density target plasma (n-bare ≥ 4 x 1011 cm-3) had been produced by FTA; recently proposed antenna of combined type (''crankshaft''), which has the best properties of both above mentioned antennae in the whole range of densities. The excitation of the electromagnetic fields in URAGAN-3M plasmas by FTA, THTA and crankshaft antenna has been studied numerically using 1-D wave code. To study the dynamics of RF plasma production in the URAGAN-3M torsatron the 0-dimensional code have been used. The results of calculations showed better performance of crankshaft antenna compared with FTA and THTA in the whole range of plasma densities. When using the THTA at the scenario with FTA as a target plasma source, the experiments performed showed the possibility of dense plasma production (n-bare > 2 x 1013 cm-3) and heating, which had not been obtained earlier in the URAGAN-3M torsatron. The shifted towards the plasma core power deposition profile of THTA resulted in modification of plasma density profile and improvement in plasma confinement. The preliminary experiments with crankshaft antenna on plasma production showed that this antenna can produce the dense (up to 1013 cm-3) plasma in the URAGAN-3M without any additional source of target plasma and it can be used for subsequent Alfven heating. (author)

  16. Inferencias sobre Grafos

    Sira M. Allende

    2002-05-01

    Full Text Available El estudio de un juego puede ser modelado asumiendo que solo algunas partidas son observadas. Entonces el árbol del juego debe ser estimado utilizando información muestral. Similarmente ocurre al obtener información sobre el comportamiento de las decisiones tomadas por individuos muestreados sobre un árbol de decisión teórico. Al considerar una medida de probabilidad que caracterice el comportamiento de redes aleatorias se puede obtener un estimado del árbol asociado. Este problema es el analizado en este trabajo. Algunos resultados experimentales obtenidos usando Recocido Simulado ilustran el procedimiento. Su papel en el estudio de modelos económicos y de mercadeo es discutido.

  17. Escrito sobre el cuerpo

    Antonio Malalana Ureña

    2013-09-01

    Full Text Available El catálogo, en una edición bilingüe español-inglés, es una pequeña guía de la exposición Shirin Neshat. Escrito sobre el cuerpo, muestra que se integra dentro de los actos de PHOTOESPAÑA13, el festival internacional de fotografía y artes visuales. El esquema del libro es sencillo y los textos son extremadamente divulgativos. El primero de ellos, Escrito sobre el cuerpo (pp. 10-15, cuyo autor es Octavio Zaya, comisario de la exposición, resume la trayectoria de esta intelectual, que "interactúa" con la fotografía y los formatos audiovisuales, y nos presenta la argumentación narrativa de los documentos expuestos, contextualizando la obra recopilada.

  18. Estudios sobre Borges

    Facultad de Humanidades y Ciencias de la Educación

    1991-01-01

    Contenidos de la obra: De Barthes a Pierre Menard | José Luis De Diego Pierre Menard, autor del Quijote: De la poligrafía al fraude | Andrea Cucatto Homenaje a Roberto Arlt: La otra cara de la moneda | Fabio Espósito Emma a través del espejo: Una lectura de Emma Zunz | Graciela Beatriz Goldchluk Sobre el concepto de verdad en Borges | Sergio Pastormerlo

  19. Sobre genes y electrones

    Martín Pereda, José Antonio

    1992-01-01

    El autor reflexiona sobre un artículo publicado en una revista, en el que se pronosticaba un declive para los científicos dedicados a la física y la ciencia armamentística, debido al fin de la guerra fría, y un ascenso al poder de los biólogos y de todos aquellos relacionados con las ciencias y las tecnologías de la vida.

  20. Theoretical study of 'Mixed' ligands superhalogens: Cl-M-NO3 (M = Li, Na, K)

    Zhao, Xinghua; Liu, Weihui; Wang, Jiesheng; Li, Chun; Yuan, Guang

    2016-08-01

    MCl2-, M(NO3)2-, and (Cl-M-NO3)- (M = Li, Na, K) species are systematically investigated using the density functional theory. In all the cases studied, the vertical detachment energies (VDEs) exceed the electron affinity of chlorine atom, leading to the conclusion that MCl2-, M(NO3)2- and (Cl-M-NO3)- are superhalogens. The VDEs of (Cl-M-NO3)- are between that of MCl2- and M(NO3)2-, showing that replacing one ligand with a larger electronegative ligand leads to the higher VDE. Superhalogens with suitable VDEs can be built by using different ligands.

  1. Zinc finger protein TTP interacts with CCL3 mRNA and regulates tissue inflammation*

    Kang, Ju-Gyeong; Amar, Marcelo J.; Remaley, Alan T.; Kwon, Jaeyul; Blackshear, Perry J.; Wang, Ping-yuan; Hwang, Paul M.

    2011-01-01

    Zinc finger protein tristetraprolin (TTP) modulates macrophage inflammatory activity by destabilizing cytokine mRNAs. Here, through a screen of TTP-bound mRNAs in activated human macrophages, we have identified CC chemokine ligand 3 (CCL3) mRNA as the most abundantly bound TTP target mRNA and have characterized this interaction via conserved AU-rich elements. Compared to the wild-type cells, TTP−/− macrophages produced higher levels of LPS-induced CCL3. In addition, the plasma level of CCL3 i...

  2. Study on adaptation of radiation sterilization of 3M Steri-DrapeTM

    Based on ISO11137, bioburden of 3M Steri-DrapeTM and the sterilization dose were determined. Results indicated that the adjusted average bioburden was 3082.5 cfu per device, verification dose was 12.6 kGy and the minimum sterilization dose was 26.8 kGy (SAL 10-6). The irradiated sample products were tested to verify properties of the package materials and biocompatibility of the device. Results showed that after the irradiation and accelerated aging test, the sample products and the package were qualified. The device remained sterile and no adverse response was found in cytotoxicity test, and animal test and clinical applications

  3. Measurements of neutron fluxes and cadmium ratio at equilibrium core in JRR-3M

    Construction and characteristics tests of JRR-3M (Modified JRR-3) had been completed on October 1990, and the reactor reached to equilibrium core in July 1991. Measurements of neutron flux and cadmium ratio in Hydraulic irradiation facility (HR) and Pneumatic irradiation facility (PN) at 20 MW reactor power were carried out for the equilibrium core from May to August 1991 and for the latest core in April 1993. The results at the equilibrium core and the latest core are described in this paper. (author)

  4. 1H and 7Li NMR in li2-xhxmo3 (m = Ti, Zr)

    Baklanova, Ya

    2008-01-01

    Nuclear magnetic resonance (NMR), Raman spectroscopy and thermogravimetric methods were used to study the peculiarities of lithium ion replacement by protons in lithium metallates Li2MO3 (M=Ti, Zr). In this article we show that almost all protons in the final substitution products H2MO3 enter into the crystal structure. All protons in zirconium hydroxide belong to hydrogen-bonded OH-groups. Contrary, titanium hydroxide contains both hydrogen-bonded and isolated OH-groups. Protons in H2ZrO3 fo...

  5. Integrated acquisition system of experimental data for Uragan-2M and Uragan-3M

    The paper describes the integrated data acquisition system representing in real time the parameters of plasma confined in stellarator-type fusion devices Uragan-2M and Uragan-3M, which are under operation in the Institute of Plasma Physics of NSC KIPT. This system provides the synchronous multichannel high-speed measurements of electric signals coming from the sensors of the device equipment and plasma diagnostic equipment, data acquisition, transportation and graphical display of information, archiving it in the server and in the electronic data repository. The system gives to the users the possibility of access to the files with the registered diagnostic information.

  6. Assessment of irradiation effects on beryllium reflector and heavy water tank of JRR-3M

    Murayama, Yoji; Kakehuda, Kazuhiro [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment

    1998-10-01

    The JRR-3M, a swimming pool type research reactor with beryllium and heavy water reflectors, has been operated since 1990. Since the beryllium reflectors are close to fuel and receive high fast neutron fluence in a relatively short time, they may be subject to change their dimensions by swelling due mostly to entrapped helium gaseous. This may bend the reflectors to the outside and narrow gaps between the reflectors and the fuel elements. The gaps have been measured with an ultrasonic thickness gage in an annual inspection. The results in 1996 show that the maximum of expansion in the diametral directions was 0.6 mm against 1.6 mm of a managed value for replacement of the reflector. A heavy water tank of the JRR-3M is made of aluminum alloy A5052. Surveillance tests of the alloy have been conducted to evaluate irradiation effects of the heavy water tank. Five sets of specimens of the alloy have been irradiated in the beryllium reflectors where fast neutron flux is higher than that in the heavy water tank. In 1994, one set of specimens had been unloaded and carried out the post-irradiation tests. The results show that the heavy water tank preserved satisfactory mechanical properties. (author)

  7. Calculation of fine neutron spectrum in irradiation holes in fuel region of JRR-3M

    The authors have a plan to evaluate TRU neutron cross sections based on the activation experiments by using JRR-3M. Fine neutron spectrum expressed by 107 energy group structure at irradiation holes in fuel region of JRR-3M core, which was utilized to analyze experimental data, was calculated by 2 step calculation. The first step is the whole core calculation taking account of burnup history and control rod pattern, and the second step is the irradiation hole calculation without any homogenization of irradiation hole components by taking into account of the neutron spectrum of surrounding region. Fine neutron spectra calculated by 2 step calculation were compared with the experimental results on reaction rate, both agreed within several percents relatively. In the comparison of absolute values, however, the maximum difference was up to 30 percents in the vicinity of control rods. This originates from the neutron transport effect around control rods. An improvement for the treatment of neutron transport effect is needed to get higher accuracy. (author)

  8. Unique Roll-Off Roof for Housing 1.3 m Telescope at Devasthal, Nainital

    Bangia, Tarun

    2016-05-01

    Aryabhatta Research Institute of Observational Sciences (ARIES) had set up a 1.3 m telescope at Devasthal, Nainital, India in the year 2010. Country's largest roll-off roof was indigenously designed, fabricated and installed on top of a building (17 × 8 m) for housing 1.3 m telescope. Telescope was supplied by M/s DFM Engineering Inc., USA to ARIES and was installed in the building with unique roll-off roof to protect it from external environment. Roll-off roof was designed and fabricated considering various parameters and available manpower and resources at ARIES. This paper presents mechanical development work, simple but distinct design approach and innovative selection of materials to economically manufacture roll-off roof of large size (8 × 8 × 4 m) at hilly remote site of Devasthal situated in Central Himalayan region. All operations in the roof viz. opening of shutters and rolling of roof were motorized to facilitate observers during night observations.

  9. Apuntes sobre liderazgo

    Contreras, Manuel E.

    2010-01-01

    Este trabajo presenta una breve síntesis de las principales teorías de liderazgo y se centra sobre el enfoque de liderazgo adaptativo de Ronald Heifetz. El documento originalmente fue desarrollado para las sesiones de educación a distancia de INDES. Ha sido revisado para usar en otros ámbitos de capacitación y ha sido utilizado en sesiones presenciales llevadas a cabo por INDES, como por otras entidades en universidades y centros de capacitación de America Latina.

  10. Informe APEI sobre movilidad

    Arroyo Vázquez, Natalia

    2011-01-01

    Este informe incluye una amplia aproximación al concepto de movilidad, desde un punto de vista introductorio, que nunca antes en nuestro ámbito había abarcado todos los aspectos que tienen que ver con él, desde cuestiones técnicas como los dispositivos móviles, sistemas operativos y navegadores, conectividad y estándares —cuya intención es poder comprender todos aquellos aspectos relacionados con la movilidad y que tienen una incidencia directa sobre los contenidos— hasta otras más relacionad...

  11. Sobre el razonamiento judicial

    Asís Roig, Rafael de

    1998-01-01

    El trabajo elabora modelos a través de los cuáles es posible reconstruir la argumentación judicial plasmada en las sentencias y, a la vez, hacer explícitas las reglas que sirven de justificación a sus decisiones, y el marco normativo utilizado como referencia. El estudio analiza tanto los pronunciamientos sobre hechos como los que se refieren a la calificación jurídica, en principio, desde una perspectiva descriptiva. Ahora bien, también se llevan a cabo reflexiones y propuestas que van más a...

  12. 'Scorpion-like' dithiocarbamato-carboxylate ligands for linking M(CO)3+ (M = Tc, Re)

    Complexation of M(CO)3+ (M = Tc, Re) with dithiocarbamato-carboxylate ligands was studied. It was found that the dithiocarbamate chelation unit has rather high affinity to M(CO)3+ species and the resulting complexes are extremely stable in a wide pH range. The complex M(CO)3[S2CN(CH2COO)2] is monomeric in solution (ESI MS) and dimeric in the crystal phase (single-crystal XRD). The 'scorpion-like' dithiocarbamato-carboxylate ligands were prepared; it was shown that C5 chain is long enough to reach back to the free coordination vacancy in M(CO)3+ core and to block it. (author)

  13. Electronic structure and magnetism of KMF3 (M=Mn,Fe,Co,Ni)

    Pari, G.; Mathi Jaya, S.; Asokamani, R.

    1994-09-01

    Antiferromagnetic electronic-structure calculations of the perovskite fluorides KMF3 (M=Mn,Fe,Co,Ni) carried out using the linear muffin-tin orbital method are reported here. The calculations have successfully predicted the insulating gaps of the systems KMnF3 and KNiF3. However, in the cases of KFeF3 and KCoF3 the insulating gap could not be accounted for by these calculations and this is found to be due to the fact that the spin-density-functional theory is inadequate to show the splitting of the M t2g bands. However, the magnetic moments obtained from the calculations are comparable to the experimental values, and also the calculated density of states show good agreement overall with the photoemission data.

  14. Determination of the first hydrolysis constant of Europium (III) in 3 M of ionic strength

    The first hydrolysis constant of Eu3+ has been determined at 303 K and 3 M (NaCl) ionic strength. A solvent extraction method was used, the extractant was dibenzoylmethane in benzene and di glycolate anion in the aqueous phase provided competitive complexation. The tracer solution was 152m1 Eu (III) in water. The radioactive solution of europium was obtained by neutron irradiation of europium nitrate solutions at pH 3.0, in a TRIGA Mark III nuclear reactor at a neutron flux of 1 x 1013 cm-2 s-1. The half life of the produced isotope, 152m1 Eu (9.3 h), was verified by means of a Ge H detector and no interfering radiations were observed in the spectra. (Author)

  15. 嵌入式工控机系统ARK-6310-3M04E

    2009-01-01

    研华科技近期推出嵌入式工控机系统ARK-6310—3M04E,该产品配有Intel。ATOM处理器、Intel 945GSE芯片组和集成Mini—ITX母板,采用无风扇设计,可在恶劣环境中无噪声并可靠工作。该款紧凑、坚固型工业系统集成在一个多功能嵌入式机箱中,超紧凑的坚固构造,坚固的耳柄允许用户方便移动设备,扩展性能强,

  16. Automated 1.3-m near-infrared telescope system triggered by gamma-ray burst

    Murakami, Toshio; Yonetoku, Daisuke; Kinoshita, Shin; Masui, Hiroki; Okuno, Shinya; Yoshinari, Satoru; Kidamura, Takashi; Tanabe, Sachiko; Yokota, Satoshi; Kobayashi, Yukiyasu; Nakagawa, Takao; Nakamura, Takashi

    2006-06-01

    The design for robotic telescopes to observe Gamma-Ray Burst (GRB) afterglows and the results of observations are presented. Quickly fading bright GRB flashes and afterglows provide a good tool to study an extremely early universe. However, most large ground-based telescopes cannot afford to follow-up the afterglows and flashes quickly within a few hours since a GRB explosion. We re-modeled the existing middle-class 1.3 m ø telescope of the near infrared band at ISAS in Japan to match for the above requirement. We also set a small telescope of 30 cm diameter with a conventional CCD. These telescopes can monitor afterglows quickly within a few minutes in J, H, Ks and R band with a grism spectrometer.

  17. Spectroscopic study of Mq3 (M=Al, Ga, In, q=8-hydroxyquinolinate) at high pressure

    A high-pressure spectroscopic investigation of OLED materials with generic formula Mq3 (M=Al, Ga, In, q=8-hydroxyquinolinate) has been carried out. The meridional isomer of Alq3, Gaq3, Inq3 and facial isomer of Alq3 have been produced and their corresponding photoluminescence emission energy has been studied as a function of the cation, pressure, excitation wavelength and isomer. A redshift in the order of 0.3 eV takes place for the pure-meridional isomer compounds in the 0-8 GPa range. We have detected the occurrence of pressure-induced phase transitions presenting hysteresis to ambient conditions. In the case of the facial isomer, luminescence does not significantly redshift until very high pressure. We interpret these features in terms of the enhancement of the intermolecular interaction.

  18. Modeling the hydrothermal circulation and the hydrogen production at the Rainbow site with Cast3M

    Perez, F.; Mügler, C.; Charlou, J.; Jean-baptiste, P.

    2012-12-01

    On the Mid-Atlantic Ridge, the Rainbow venting site is described as an ultramafic-hosted active hydrothermal site and releases high fluxes of methane and hydrogen [1, 2]. This behavior has first been interpreted as the result of serpentinization processes. But geochemical reactions involving olivine and plagioclase assemblages, and leading to chlorite, tremolite, talc and magnetite assemblages, could contribute to the observed characteristics of the exiting fluid [2]. The predominance of one of these geochemical reactions or their coexistence strongly depend on the hydrothermal fluid circulation. We developed and validated a 2D/3D numerical model using a Finite Volume method to simulate heat driven fluid flows in the framework of the Cast3M code [3, 4]. We also developed a numerical model for hydrogen production and transport that is based on experimental studies of the serpentinization processes [5-6]. This geochemical model takes into account the exothermic and water-consuming behavior of the serpentinization reaction and it can be coupled to our thermo-hydrogeological model. Our simulations provide temperatures, mass fluxes and venting surface areas very close to those estimated in-situ [7]. We showed that a single-path model [8] was necessary to simulate high values such as the in-situ measured temperatures and estimated water mass fluxes of the Rainbow site [7]. This single-path model will be used to model the production and transport of hydrogen at the Rainbow hydrothermal site. References [1]Charlou et al. (2010) AGU Monograph series. [2]Seyfried et al. (2011) Geochim. Cosmochim. Acta 75, 1574-1593. [3]http://www-cast3m.cea.fr. [4]Martin & Fyfe (1970) Chem. Geol. 6, 185-202. [5] Marcaillou et al. (2011) Earth and Planet. Sci. Lett. 303, 281-290. [6]Malvoisin et al. (2012) JGR, 117, B01104. [7]Perez et al. (2012) submited to Computational Geosciences. [8]Lowell & Germanovich (2004) AGU, Washington DC, USA.

  19. Sobre historia mundial hoy

    Vera Weiler

    2010-08-01

    Full Text Available Los procesos de globalización son una realidad; su enorme impacto sobre la vida humana los ha convertido en un tema recurrente sobre el que se escribe y se comenta a diario también en Colombia. Los libros que de ellos tratan, ante todo los que 10 hacen en tono crítico, baten records en la industria editorial en todo el mundo. Las expectativas que acerca del futuro abrigan cientos de millones de personas se relacionan con 10 que ellas esperan, para bien o para mal, de la globalización. Las posturas que los gobernantes ocupan al respecto en el mundo son, cuando menos de aceptación, generalmente de activa participación en pos de la globalización. Por un lado, crece la preocupación y se multiplican las protestas; por el otro, dominan los razonamientos de los especialistas en materia de maximización de los rendimientos de los capitales que presentan la globalización, al estilo que se viene imponiendo, como el camino ineludible del gobierno universal de la eficiencia. ¿Tienen que decir algo los historiadores frente a todo esto?.

  20. Subproject plan for demonstration of 3M technology for treatment of N Basin water

    A dissolved radionuclides removal demonstration is being conducted at the 105-N Basin as part of the 100-N Area Projects' policy of aggressively integrating innovative technologies to achieve more cost effective, faster, and/or safer deactivation operations. This subproject plan demonstrates new technology (marketed by the 3M trademark Company) that absorbs specific ions from water. The demonstration will take place at the spent fuel basin at the N Reactor facility. The 105-N Basin contains 1 million gal of water consisting of approximately 32 Ci of dissolved 90Sr at a concentration of 8.4 uCi/L and 7.3 Ci of dissolved 137Cs at a concentration of 1.92 uCi/L. The Hanford Federal Facility Agreement and Consent Order (Tri-Party Agreement [Ecology et al. 1990]) Milestone M-16-01E-T2 requires the initiation of pretreatment and removal of all N Reactor fuel storage basin waters by September 30, 1996, pursuant to the N Reactor Deactivation Program Plan (WHC 1993). 105-N Basin dewatering is on the critical path for overall deactivation of N Reactor by March 1997. The 105-N Basin Deactivation Program Plan (BHI 1995) includes removing debris, hardware, algae and sediment from the basin, followed by pretreatment (filtration) and removal of the 1005-N Basin water. Final water removal is currently scheduled for September 30, 1996. The recommended method of the 105-N Basin water is the treatment of the water at the Effluent Treatment Facility (ETF) in the 200 East Area. The demonstration of the 3M technology could be a feasible treatment alternative to the ETF if the ETF is not available to meet the project schedule or if additional pretreatment is needed to reduce the inventory of radioactive species to be handled at the ETF. Demonstration of this technology could be of value for other fuel basins at the Hanford Site and possibly other US Department of Energy (DOE) sites and non- DOE nuclear power plants

  1. KEPADATAN JENTIK Aedes aegypti SEBAGAI INDIKATOR KEBERHASILAN PEMBERANTASAN SARANG NYAMUK (3M PLUS: DI KELURAHAN SRONDOL WETAN, SEMARANG

    Bhinuri

    2008-06-01

    Full Text Available Aedes aegypti larva density as an indicator of the success in mosquito breeding place irradication in East Srondol village, Semarang. Interventions have been done to reduce DHF incidence, such as fogging and suggestion to do 3 M plus, but ABJ (larva’s number of Semarang is still under the target. The best intervention is by doing 3M plus. The aims of this research are to know the relation between social characteristics, knowledge, and attitude with the habitual elimination 3 M Plus of mosquito sites, the relation between the habitual elimination 3 M Plus of mosquito sites with larva density, the larva density and also the prediction model of larva density from the habitual elimination 3 M Plus of mosquito sites. The research has been done at Kelurahan Srondol Wetan, with observational, quantitative, and explanatory research by using cross-sectional survey method. The population were the houses with the respondent-the person who did the habitual elimination 3 M Plus of mosquito sites. Sample number were 188 with stratified random sampling. The statistic test was the Kendalls Tau and multiple regresion. The result showed that there are relation between social characteristics such as education, family number, job, and salary, with the habitual elimination 3 M Plus of mosquito sites but there is no relation with age, knowledge and attitude. There are also relations between the habitual elimination 3 M Plus of mosquito sites at bath tub, water tub and also bucket with the larva density. Based on those results, Health Department of Semarang especially Community Health Center in Srondol Wetan expected to do health education about 3 M Plus at bath tub, bucket and water tub. Suggestion also addressed to the next researcher to use purposive sampling and water storage classification for the same research.

  2. Theoretical studies of the paramagnetic perovskites MTaO{sub 3} (M = Ca, Sr and Ba)

    Ali, Zahid, E-mail: zahidf82@gmail.com [Center for Computational Materials Science, University of Malakand, Chakdara, Dir (Lower) (Pakistan); Khan, Imad; Ahmad, Iftikhar; Khan, M. Salman [Center for Computational Materials Science, University of Malakand, Chakdara, Dir (Lower) (Pakistan); Asadabadi, S. Jalali [Department of Physics, Faculty of Science, University of Isfahan, Hezar Gerib Avenue, Isfahan, 81744 (Iran, Islamic Republic of)

    2015-07-15

    In the present density functional studies, structural, mechanical and magneto-electronic properties of CaTaO{sub 3,} SrTaO{sub 3} and BaTaO{sub 3} perovskites have been investigated. The calculated structural parameters by DFT and analytical methods are found consistent with the experiments. The analytically calculated tolerance factors of these compounds as well as their mechanical properties show that they are stable in the cubic phase. Furthermore elastic properties show that these materials are ductile in nature and confirm that BaTaO{sub 3} is harder than the rest compounds. The calculated spin dependent magneto-electronic properties reveal the paramagnetic metallic nature of these compounds. The electrical conductivity curve demonstrates significant conductivity above room temperature. On the basis of the presented properties it is expected that these compounds could be efficient electrode materials and need experimental investigations. - Highlights: • MTaO{sub 3} (M = Ca, Sr and Ba) perovskites are investigated theoretically in the frame work of density functional theory. • Mechanical properties explain the stability of these compounds and show that BaTaO{sub 3} is more ductile. • The magneto-electronic studies reveal the paramagnetic metallic nature of these compounds. • Significant electrical conductivity is observed above room temperature.

  3. Lattice relaxation and ferromagnetic character of (LaVO3) m/SrVO3superlattices

    Schuster, Cosima B.

    2013-08-01

    The experimental observation that vanadate superlattices (LaVO 3)m/SrVO3 show ferromagnetism up to room temperature (Lüders U. et al., Phys. Rev. B, 80 (2009) 241102(R)) is investigated by means of density functional theory, and the band structure for m = 5 and 6 is calculated. A buckling of the interface VO2 layers is found in both cases, but subtle differences in bond length lead to very different properties for even and odd values of m: in the even case, the two interface VO2 layers effectively decouple from the adjacent LaO layers due to a strong bond length enhancement. This results into a local inversion of the orbital occupancy and to the confinement of the charge carriers. In the odd case, the amplitude of the bond length variation is smaller, so that the charge carriers spill into the deeper-lying VO2 layers, and spin-polarised interfaces are obtained. © Copyright EPLA, 2013.

  4. Oxidation, Reduction, and Condensation of Alcohols over (MO3)3 (M=Mo, W) Nanoclusters

    Fang, Zongtang; Li, Zhenjun; Kelley, Matthew S.; Kay, Bruce D.; Li, Shenggang; Hennigan, Jamie M.; Rousseau, Roger J.; Dohnalek, Zdenek; Dixon, David A.

    2014-10-02

    The reactions of deuterated methanol, ethanol, 1-propanol, 1-butanol, 2-propanol, 2-butanol and t-butanol over cyclic (MO3)3 (M = Mo, W) clusters were studied experimentally with temperature programmed desorption (TPD) and theoretically with coupled cluster CCSD(T) theory and density functional theory. The reactions of two alcohols per M3O9 cluster are required to provide agreement with experiment for D2O release, dehydrogenation and dehydration. The reaction begins with the elimination of water by proton transfers and forms an intermediate dialkoxy species which can undergo further reaction. Dehydration proceeds by a β hydrogen transfer to a terminal M=O. Dehydrogenation takes place via an α hydrogen transfer to an adjacent MoVI = O atom or a WVI metal center with redox involved for M = Mo and no redox for M = W. The two channels have comparable activation energies. H/D exchange to produce alcohols can take place after olefin is released or via the dialkoxy species depending on the alcohol and the cluster. The Lewis acidity of the metal center with WVI being larger than MoVI results in the increased reactivity of W3O9 over Mo3O9 for dehydrogenation and dehydration.

  5. Visualization and measurement of pressurized multiphase flow using neutron radiography of JRR-3M system

    Katoh, Yasuo [Yamaguchi Univ. (Japan); Matsubayasi, Masahito

    1998-01-01

    Concerning the transient phenomenon of solid-gas two-phase flow, an attempt was made to visualize and measure a flow phenomenon in which three-dimensional bubbles occurred, grew and collapsed in the vicinity of a gas injection nozzle while solid particles were circulating. Such a phenomenon could not or hardly be visualized and measured by conventional methods. Such two-phase flow was visualized using neutron radiography, its characteristics measured and the usefulness of the visualization by neutron radiography confirmed. For this purpose, three-dimensional fluidized bed vessels, rectangular or cylindrical-shaped, made of steel or aluminum sheet, were prepared. Polyethylene or glass beads were used as solid particles and activated carbon particles as the tracer. In the experiment, nitrogen gas was blown into the vessel from one nozzle and distributors provided at the bottom of the vessel and exhausted from the top via the exhaust valve, by which the pressure in the vessel was controlled. The imaging was done in the following way: A test chamber was provided beside the vessel to receive neutron beams from the JRR-3M system, the intensity of transmitted neutrons was converted to visible light by scintillator and the images were videotaped. The initial objectives of visualizing and measuring bubbles occurring, growing and collapsing and solid particles circulating in the solid-gas two-phase flow have been achieved by means of neutron radiography. (N.H.)

  6. CRM System Using UI-AKD Approach of D3M

    J.N.V.R.Swarup kumar,

    2010-03-01

    Full Text Available Customer Relationship Management has entered the mainstream. Despite the uncertainty of the economy, CRM is being thrust into corporate budgets and talked about as a critical initiative by numerous of companies. It has gone from being an important edge in the business world to a necessary tool for survival. Building an effective CRM system can get more effectively in acquiring new customers, increasing value of existing customers and retaining good customers. At the same time, the data of data warehouse will offer the best dataresource for the application of Domain Driven Data Mining (D3M for short on CRM. This paper introduces CRM and managing relationships with customers has become a critical organizational competency. Get winning strategies with the latent advanced technologies. Then ntroduces the architecture of CRM based on Domain Driven Data Mining, discusses the main steps of designing the Data warehouse and describes the meaning of Domain Driven Data Mining applied to CRM. Atlast, the promoting effects of Domain Driven Data Mining to individual service are presented .

  7. High-pressure phase transition of MH3 (M: Er, Ho)

    Hou, Pugeng; Tian, Fubo; Li, Da; Chu, Binhua; Zhao, Zhonglong; Liu, Bingbing; Cui, Tian

    2014-08-01

    Motivated by the potential high temperature superconductivity in hydrogen-rich materials, high-pressure structures of ErH3 and HoH3 were studied by using genetic algorithm method. Our calculations indicate that both ErH3 and HoH3 transform from P-3c1 structure to a monoclinic C2/m structure at about 15 GPa, and then transforms into a cubic Fm-3m structure at about 40 GPa. ErH3 and HoH3 adopt the same P63/mmc structure with space group P63/mmc at above about 220 and 196 GPa, respectively. For ErH3, the P63/mmc phase is stable up to at least 300 GPa, while for HoH3, a phase transformation P63/mmc → Cmcm occurs at about 216 GPa, and the Cmcm phase is stable up to at least 300 GPa. The P-3c1 ErH3 and HoH3 are calculated to demonstrate non-metallic character, and the other phases are all metallic phases.

  8. Magnetic properties and specific heat of MPS3 (M=Mn, Fe, Zn)

    The magnetic properties and specific heat of MPS3 (M=Mn, Fe and Zn) have been investigated. While ZnPS3 is non-magnetic, MnPS3 and FePS3 are antiferromagnets with the Neel temperature TN of 78 and 118 K, respectively. Nevertheless, the specific heat of MnPS3 and FePS3 is smaller than that of ZnPS3 below about 20 K. The temperature dependence of the magnetic specific heat CM of MnPS3 shows a broad hump which is characteristic to the two dimensional magnetic materials and a small sharp peak at TN. On the other hand, that of FePS3 shows a large sharp peak at TN. As for FePS3, the temperature dependences of the magnetization M and CM are well reproduced by taking account of the magneto-elastic effect which introduces an additional term proportional to the square of the average value of the spin to the exchange coupling constant. As for MnPS3, marked two dimensional characters appear in the temperature dependence of M and CM. The observed TN is much smaller than the paramagnetic Curie temperature of 240 K obtained from the temperature dependence of the magnetic susceptibility at high temperature

  9. Low temperature specific heat and thermoelectric power of UCu3M2Al7 alloys

    The specific heat and thermoelectric power of the UCu3M2Al7 alloys where M = Cr, Mn and Fe are presented. The specific heat has been measured in the temperature range 2.6-70 K in magnetic field H = 0 and 3 T using a homemade and full automatic calorimeter, whereas the thermoelectric power has been measured from 6 to 300 K employing a differential method with copper as reference material. The temperature dependence of the specific heat exhibits only a minute influence of magnetic field and no anomaly in the investigated temperature region. However, the coefficients of the electronic specific heat of all alloys are very close, being enhanced amount to about 200 mJ mol-1 K-2 at high temperature and to about 400 mJ mol-1 K-2 at low temperature. Strongly correlated electrons or crystallographic disorder are considered as a reason for these values. The thermoelectric power demonstrates moderate values within whole investigated temperature range

  10. $P^{3}M-SPH$ simulations of the Lyman-$\\alpha $ Forest

    Theuns, T; Efstathiou, G P; Pearce, F R; Thomas, P A; Theuns, Tom; Leonard, Anthony; Efstathiou, George

    1998-01-01

    (Abridged) We investigate the importance of several numerical artifacts such as lack of resolution on spectral properties of the Lyman alpha forest as computed from cosmological hydrodynamic simulations in a standard cold dark matter universe. We assume an ionising background produced by quasars as computed by Haardt & Madau. We use a new simulation code based on P3M and SPH, which we compare in detail with a modified version of HYDRA (Couchman et al.) and published results of TREESPH (Hernquist et al.). The agreement is very good between all three codes. We then use our new code to investigate several numerical effects such as resolution on spectral statistics deduced from Voigt profile fitting. Our highest resolution simulation has a mass resolution of 2.1x10^5 solar masses. The column density distribution is converged but the b-parameter distribution is only marginally converged. The simulation reproduces both the HI column density and b-parameter distribution when we assume a high baryon density, Omeg...

  11. Voz sobre frame relay

    D´Elia, Gabriel Anibal

    2000-01-01

    Esta tesis trata el tema de VOFR, desde la digitalización de la voz hasta su transmisión a través de dicha red, así también como la comparación con otros medios de transporte como VOIP. Dada las características del protocolo frame relay y su disponibilidad se eligió como el medio más apropiado para la transmisión de voz y datos en forma integrada sobre una misma red. El trabajo comienza con una breve explicación de la voz, su digitalización y forma actual de transmisión a través de una red di...

  12. Excertos sobre o sedentarismo

    Alexandre Palma

    2014-09-01

    Full Text Available O sedentarismo tem sido tratado como algo perfeitamente determinável, objetivo e, portanto, que pode ser apreendido. Por outro lado, o conceito de sedentarismo ainda permanece questionável e, por conseguinte, os instrumentos mostram-se inconsistentes. Neste sentido, o objetivo do presente estudo foi mostrar que diferentes discursos de verdade vêm concorrendo por esse conceito, o que nos motiva a pensar qual é a verdade ou, até mesmo, se há alguma verdade sobre ele. Após apresentarmos diferentes possibilidades de compreender o sedentarismo, através do uso de aforismos, entendemos que postular um discurso como verdade talvez apenas signifique que as pessoas nele creem e que há uma vontade de verdade como uma vontade voltada para o poder.

  13. The first-principle studies of the crystal phase transitions: Fd3m-MgAl2O4→F4-3m-MgAl2O4

    Magnesium aluminum spinel (MgAl2O4) is a major constituent of the shallow upper mantle. It is of great geophysical importance to explore its physical properties under high pressure and temperature. The first-principle density functional theory (DFT) with the plane wave along with pseudopotential was employed to obtain the total energy for both Fd3m-MgAl2O4 and F4-3m-MgAl2O4, which was used to generate the Gibbs free energy as a function of temperature and pressure with the quasi-harmonic Debye model. It is found that the phase transition temperature from Fd3m-MgAl2O4 to F4-3m-MgAl2O4 is beyond 452.6 K in the pressure regime studied, which is consistent with the experiment. The phase transition temperature is related to pressure by a linear function, i.e. T=8.05P+452.6, which is the first equation of this kind to describe the phase transition Fd3m→F4-3m. The elastic constants, equation of states and thermodynamic properties of Fd3m-MgAl2O4 are also reported in this paper to make a complete study.

  14. Error analysis for CO and CH4 total column retrievals from SCIAMACHY 2.3 ?m spectra

    Aben, I.; O. P. Hasekamp; Schrijver, H.; Gloudemans, A. M. S.

    2008-01-01

    International audience A detailed sensitivity analysis of the Iterative Maximum Likelihood Method (IMLM) algorithm and its application to the SCIAMACHY 2.3 ?m spectra is presented. The sensitivity analysis includes a detailed assessment of the impact of aerosols in the 2.3 ?m range. Results show that near strong aerosol sources mineral dust and biomass aerosols can have an effect of ~7?10% on the CH4 total columns retrieved from this wavelength range. Similar but somewhat larger effects ar...

  15. ErbB3 mRNA leukocyte levels as a biomarker for major depressive disorder

    Milanesi Elena

    2012-09-01

    Full Text Available Abstract Background In recent years, the identification of peripheral biomarkers that are associated with psychiatric diseases, such as Major Depressive Disorder (MDD, has become relevant because these biomarkers may improve the efficiency of the differential diagnosis process and indicate targets for new antidepressant drugs. Two recent candidate genes, ErbB3 and Fgfr1, are growth factors whose mRNA levels have been found to be altered in the leukocytes of patients that are affected by bipolar disorder in a depressive state. On this basis, the aim of the study was to determine if ErbB3 and Fgfr1 mRNA levels could be a biomarkers of MDD. Methods We measured by Real Time PCR ErbB3 and Fgfr1 mRNA expression levels in leukocytes of MDD patients compared with controls. Successively, to assess whether ErbB3 mRNA levels were influenced by previous antidepressant treatment we stratified our patients sample in two cohorts, comparing drug-naive versus drug-free patients. Moreover, we evaluated the levels of the transcript in MDD patients after 12 weeks of antidepressant treatment, and in prefrontal cortex of rats stressed and treated with an antidepressant drug of the same class. Results These results showed that ErbB3 but not Fgfr1 mRNA levels were reduced in leukocytes of MDD patients compared to healthy subjects. Furthermore, ErbB3 levels were not affected by antidepressant treatment in either human or animal models Conclusions Our data suggest that ErbB3 might be considered as a biomarker for MDD and that its deficit may underlie the pathopsysiology of the disease and is not a consequence of treatment. Moreover the study supports the usefulness of leukocytes as a peripheral system for identifying biomarkers in psychiatric diseases.

  16. Initial operation and checkout of stratospheric aerosol gas experiment and Meteor-3M satellite

    Habib, Shahid; Makridenko, Leonid; Chu, William P.; Salikhov, Rashid; Moore, Alvah S., Jr.; Trepte, Charles R.; Cisewski, Michael S.

    2003-04-01

    Under a joint agreement between the National Aeronautics and Space Agency (NASA) and the Russian Aviation and Space Agency (RASA), the Stratospheric Aerosol Gas Experiment III (SAGE III) instrument was launched in low earth orbit on December 10, 2001 aboard the Russian Meteor-3M(1) satellite from the Baikonur Cosmodrome. SAGE III is a spectrometer that measures attenuated radiation in the 282 nm to 1550 nm wavelength range to obtain the vertical profiles of ozone, aerosols, and other chemical species that are critical in studying the trends for the global climate change phenomena. This instrument version is more advanced than any of the previous versions and has more spectral bands, elaborate data gathering and storage, and intelligent terrestrial software. There are a number of Russian scientific instruments aboard the Meteor satellite in addition to the SAGE III instrument. These instruments deal with land imaging and biomass changes, hydro-meteorological monitoring, and helio-geophysical research. This mission was under development for over a period of six years and offered a number of unique technical and program management challenges for both Agencies. SAGE III has a long space heritage, and four earlier versions of this instrument have flown in space for nearly two decades now. In fact, SAGE II, the fourth instrument, is still flying in space on NASA's Earth Radiation Budget Satellite (ERBS), and has been providing important atmospheric data over the last 18 years. It has provided vital ozone and aerosol data in the mid latitudes and has contributed vastly in ozone depletion research. Ball Aerospace built the instrument under Langley Research Center's (LaRC) management. This paper presents the process and approach deployed by the SAGE III and the Meteor teams in performing the initial on-orbit checkout. It further documents a number of early science results obtained by deploying low risk, carefully coordinated procedures in resolving the serious operational

  17. Design report for a cryostable 3m diameter superconducting solenoid for the Fermilab Collider Detector Facility

    The Fermilab Collider Detector Facility (CDF) is a large detector system designed td study anti pp collisions at very high center of mass energies. The central detector for the CDF employs a large axial magnetic field volume instrumented with a central tracking chamber composed of multiple layers of cylindrical drift chambers and a pair of intermediate tracking chambers. The purpose of this system is to determine the trajectories, sign of electric charge, and momenta of charged particles produced with polar angles between 10 and 170 degrees. The magnetic field volume required for tracking is approximately 4 m long and 3 m in diameter. To provide the desired Δp/sub T//p/sub T/ less than or equal to 15% at 50 GeV/c using drift chambers with approx. 200μ resolution the field inside this volume should be 1.5 T. This field should be as uniform as is practical to simplify both track finding and the reconstruction of particle trajectories with the drift chambers. Such a field can be produced by a cylindrical current sheet solenoid with a uniform current density of 1.2 x 106 A/m (1200 A/mm) surrounded by an iron return yoke. For practical coils and return yokes, both central electromagnetic and central hadronic calorimetry must be located outside the coil of the magnet. This geometry requires that the coil and cryostat be thin both in physical thickness and in radiation and absorption lengths. This dual requirement of high linear current density and minimal coil thickness can only be satisfied using superconducting technology. In this report we describe a design for a cryostable superconducting solenoid intended to meet the requirements of the Fermilab ies TDF

  18. Synthesis of LaMO3 (M = Fe, Co, Ni) using nitrate or nitrite molten salts

    Research highlights: → The molten salt, synthesis temperature, the oxidising properties, the basicity and oxidation states of the melt play an important role in LaMO3 synthesis. → The system needs a careful optimisation of these parameters to obtain pure orthorhombic LaFeO3, hexagonal LaCoO3 and LaNiO3. Purely hexagonal LaNiO3 nanocrystals were successfully synthesized. → SEM analyses were taken to investigate how the different parameters affect the microstructure of the samples. → The specific surface area and crystallite size of LaMO3 show much difference in different system. - Abstract: Perovskite compound LaMO3 (M = Fe, Co, Ni) nanocrystals were successfully synthesized in molten nitrates or nitrites from a mixture of lanthanum nitrate and an M-containing nitrate for 2 h. The effect of the various process parameters on the phase purity, crystallite size, specific surface area and morphology of the synthesized nanocrystals were systematically studied by XRD, scanning electron microscopy (SEM), simultaneous TG/DSC and BET measurements. The results showed that salt medium, annealing temperatures (mainly 450-850 oC), oxidising properties and basicity of the melt played an important role in the synthesis of LaMO3. The addition of Na2O2 facilitated the reaction between La2O3 and NiO or Co3O4, leading to the formation of LaNiO3 and LaCoO3 at a much lower temperature of 450 oC. Pure hexagonal LaNiO3 nanocrystals were obtained in molten NaNO3-KNO3 eutectic with Na2O2 at 550-750 oC.

  19. Tumor Necrosis Factor-related Apoptosis Ligand Induces Apoptosis in Prostate Cancer PC-3M Cell Line

    CHEN Zhohui; WANG Huafang; GU Longjie; YE Zhewei; XIAO Yajun

    2005-01-01

    To study the effect of tumor necrosis factor-related apoptosis inducing ligand (TRAIL)on PC-3M cell line, PC-3M cell line was incubated with gradient concentrations of TRAIL for 4-24h. Annixin-Ⅴ fluorescence staining and TUNEL method were employed to detect the apoptosis of PC-3M cells. The morphology of apoptotic PC-3M cells was observed by electron microscopy. The relationship between TRAIL concentrations and the percentage of apoptotic cells was evaluated by flow cytometry. The proliferation inhibitory ratio was calculated by using MTT colorimetry. Our results showed that apoptosis of PC-3M cells could be induced by treatment with TRAIL for at most 4 h. The results of flow cytometry and MTT colorimetry demonstrated a time- and concentration-dependent relationship between cell apoptosis rate and TRAIL concentration. It is concluded that apoptosis of PC-3M cells can be induced by TRAIL. Because of the selective killing effect of TRAIL on tumor ceils, it may become a potential alternative for the treatment of advanced prostate cancer.

  20. Sobre el nombre "Quechua"

    Rodolfo Cerrón-Palomino

    1985-06-01

    Full Text Available Uno de los primeros problemas con el que a menudo tropiezael estudioso de los idiomas ágrafos, como es el caso de las lenguasaborígenes de América, es el de su denominación (glotónimo.En la medida ,en que, por razones históricas, las noticias sobretales lenguas, y por consiguiente los primeros estudios sobre lasmismas, surgen a partir del contacto con los miembros de la civilización occidental, los nombres de los distintos idiomas, así comode los grupos étnicos que los manejan, son el resultado casi siempre arbitrario cie designaciones fortuitas hechas por viajeros, misiioneros y exploradores, quienes por lo general se basan, para ello, bien en descripciones físicas de los grupo étnicos, en ciertos indios geográficos que constituyen el habitat de los mismos, e incluso en prejuicios que se nutren de un marcado europocentrismo.

  1. Refletindo sobre idosos institucionalizado

    Cenir Gonçalves Tier

    2004-06-01

    Full Text Available Trata-se de uma pesquisa qualitativa, descritiva que teve por objetivo identificar como vem sendo o relacionamento idoso-família, identificando os motivos que levaram os familiares a optarem pela institucionalização do seu idoso, obtendo-se também a visão da família sobre o cuidado no lar. Para coleta dos dados utilizou-se um instrumento com perguntas abertas. A coleta dos dados efetivou-se nos meses de agosto de 2002 a julho de 2003, sendo sujeitos da pesquisa, familiares de idosos de uma instituição asilar em um município da região noroeste do Rio Grande do Sul. Através da análise de conteúdo constatou-se que a maior dificuldade encontrada pela família, visando dispensar cuidados ao idoso é a "falta de tempo para cuidar" do seu familiar idoso, pois a maioria deles exige cuidados em tempo integral.

  2. Downregulation of TIM-3 mRNA expression in peripheral blood mononuclear cells from patients with systemic lupus erythematosus

    Cai, X.Z. [Central Laboratory, First Affiliated Hospital, China Medical University, Shenyang (China); Department of Immunology, College of Basic Medical Sciences, China Medical University, Shenyang (China); Huang, W.Y.; Qiao, Y.; Chen, Y.; Du, S.Y.; Chen, D.; Yu, S. [Central Laboratory, First Affiliated Hospital, China Medical University, Shenyang (China); Liu, N. [Department of Nephrology, First Affiliated Hospital, China Medical University, Shenyang (China); Dou, L.Y. [Central Laboratory, First Affiliated Hospital, China Medical University, Shenyang (China); Jiang, Y. [Central Laboratory, First Affiliated Hospital, China Medical University, Shenyang (China); Department of Immunology, College of Basic Medical Sciences, China Medical University, Shenyang (China); Department of Dermatology, First Affiliated Hospital, China Medical University, Shenyang (China)

    2014-10-17

    The T-cell immunoglobulin and mucin domain (TIM) family is associated with autoimmune diseases, but its expression level in the immune cells of systemic lupus erythematosus (SLE) patients is not known. The aim of this study was to investigate whether the expression of TIM-3 mRNA is associated with pathogenesis of SLE. Quantitative real-time reverse transcription-polymerase chain reaction analysis (qRT-PCR) was used to determine TIM-1, TIM-3, and TIM-4 mRNA expression in peripheral blood mononuclear cells (PBMCs) from 132 patients with SLE and 62 healthy controls. The PBMC surface protein expression of TIMs in PBMCs from 20 SLE patients and 15 healthy controls was assayed by flow cytometry. Only TIM-3 mRNA expression decreased significantly in SLE patients compared with healthy controls (P<0.001). No significant differences in TIM family protein expression were observed in leukocytes from SLE patients and healthy controls (P>0.05). SLE patients with lupus nephritis (LN) had a significantly lower expression of TIM-3 mRNA than those without LN (P=0.001). There was no significant difference in the expression of TIM-3 mRNA within different classes of LN (P>0.05). Correlation of TIM-3 mRNA expression with serum IgA was highly significant (r=0.425, P=0.004), but was weakly correlated with total serum protein (r{sub s}=0.283, P=0.049) and serum albumin (r{sub s}=0.297, P=0.047). TIM-3 mRNA expression was weakly correlated with the Systemic Lupus Erythematosus Disease Activity Index (SLEDAI; r{sub s}=-0.272, P=0.032). Our results suggest that below-normal expression of TIM-3 mRNA in PBMC may be involved in the pathogenesis of SLE.

  3. Downregulation of TIM-3 mRNA expression in peripheral blood mononuclear cells from patients with systemic lupus erythematosus

    The T-cell immunoglobulin and mucin domain (TIM) family is associated with autoimmune diseases, but its expression level in the immune cells of systemic lupus erythematosus (SLE) patients is not known. The aim of this study was to investigate whether the expression of TIM-3 mRNA is associated with pathogenesis of SLE. Quantitative real-time reverse transcription-polymerase chain reaction analysis (qRT-PCR) was used to determine TIM-1, TIM-3, and TIM-4 mRNA expression in peripheral blood mononuclear cells (PBMCs) from 132 patients with SLE and 62 healthy controls. The PBMC surface protein expression of TIMs in PBMCs from 20 SLE patients and 15 healthy controls was assayed by flow cytometry. Only TIM-3 mRNA expression decreased significantly in SLE patients compared with healthy controls (P<0.001). No significant differences in TIM family protein expression were observed in leukocytes from SLE patients and healthy controls (P>0.05). SLE patients with lupus nephritis (LN) had a significantly lower expression of TIM-3 mRNA than those without LN (P=0.001). There was no significant difference in the expression of TIM-3 mRNA within different classes of LN (P>0.05). Correlation of TIM-3 mRNA expression with serum IgA was highly significant (r=0.425, P=0.004), but was weakly correlated with total serum protein (rs=0.283, P=0.049) and serum albumin (rs=0.297, P=0.047). TIM-3 mRNA expression was weakly correlated with the Systemic Lupus Erythematosus Disease Activity Index (SLEDAI; rs=-0.272, P=0.032). Our results suggest that below-normal expression of TIM-3 mRNA in PBMC may be involved in the pathogenesis of SLE

  4. An assessment of beaked redfish (S. mentella and S. fasciatus) in NAFO division 3M (with an approach to the likely impact of recent 3M cod growth on redfish natural mortality)

    Ávila de Melo, A.; SABORIDO-REY Fran; González-Troncoso, Diana; Pochtar, Maria; Alpoim, R. (Ricardo)

    2011-01-01

    The 3M redfish assessment is focused on the beaked redfish, regarded as a management unit composed of two populations from two very similar species: the Flemish Cap S. mentella and S. fasciatus. The reason for this approach is the historical dominance of this group in the 3M redfish commercial catch until 2005. However a new golden redfish fishery (S. marinus) started on September 2005 on shallower depths of the Flemish Cap bank above 300m. This new reality implied a revision of c...

  5. La trasferencia de tecnología en la UC3M: Centros Mixtos de I+D+i

    Hernán Gómez, Miguel

    2011-01-01

    La creación de los centros para la innovación en la Universidad Carlos III de Madrid promueve plataformas comunes de investigación y desarrollo entre la UC3M, las empresas, la administración pública y los usuarios, desarrollando ayudas técnicas, servicios y soluciones innovadoras para la sociedad. El objetivo general de dichos centros es promover plataformas de actuación conjunta entre la UC3M, las empresas y otros agentes sociales, para impulsar los procesos de innovación, generación y trans...

  6. The first results of beam study on C3-1-2. 'MINE' at JRR-3M

    We have constructed new beam-line 'MINE' at the cold neutron guide C3-1-2 of JRR-3M for our multilayer cold neutron interferometer experiments. The 'MINE' employs quadruple (++++) joined multilayer mirrors called 'QUAD' as its monochromator. The 'QUAD' supplies monochromatized long wave length (≥12A) neutron beam. This beam is also available for neutron reflectometers. (author)

  7. Decrease of FOXP3 mRNA in CD4~+ T cells in latent autoimmune diabetes in adult

    杨治芳

    2006-01-01

    Objective To study the percentage of peripheral blood CD4+ CD25+ T cells and the expression of F0XP3 mRNA in patients with latent autoimmune diabetes in adult (LADA). Methods Fresh peripheral blood samples were obtained from 60 patients with LADA,30 patients with type 2 diabetes and 30 age- and sex-matched

  8. Rhythmic control of mRNA stability modulates circadian amplitude of mouse Period3 mRNA.

    Kim, Sung-Hoon; Lee, Kyung-Ha; Kim, Do-Yeon; Kwak, Eunyee; Kim, Seunghwan; Kim, Kyong-Tai

    2015-03-01

    The daily oscillations observed in most living organisms are endogenously generated with a period of 24 h, and the underlying structure of periodic oscillation is an autoregulatory transcription-translation feedback loop. The mechanisms of untranslated region (UTR)-mediated post-transcriptional regulation (e.g., mRNA degradation and internal ribosomal entry site (IRES)-mediated translation) have been suggested to fine-tune the expression of clock genes. Mouse Period3 (mPer3) is one of the paralogs of Period gene and its function is important in peripheral clocks and sleep physiology. mPer3 mRNA displays a circadian oscillation as well as a circadian phase-dependent stability, while the stability regulators still remain unknown. In this study, we identify three proteins - heterogeneous nuclear ribonucleoprotein (hnRNP) K, polypyrimidine tract-binding protein (PTB), and hnRNP D - that bind to mPer3 mRNA 3'-UTR. We show that hnRNP K is a stabilizer that increases the amplitude of circadian mPer3 mRNA oscillation and hnRNP D is a destabilizer that decreases it, while PTB exhibits no effect on mPer3 mRNA expression. Our experiments describe their cytoplasmic roles for the mRNA stability regulation and the circadian amplitude formation. Moreover, our mathematical model suggests a mechanism through which post-transcriptional mRNA stability modulation provides not only the flexibility of oscillation amplitude, but also the robustness of the period and the phase for circadian mPer3 expression. Mouse Period3 (mPer3) is one of well-known clock genes. We identified three 3'-UTR-binding proteins that modulate the mRNA stability, and they influenced to the amplitude of circadian mPer3 mRNA oscillation. Our mathematical model not only showed the relationship between mRNA stability and its oscillation profile but provided the molecular mechanism for the robustness of the period and the phase in circadian oscillation. hnK, heterogeneous nuclear ribonucleoprotein (hnRNP) K; hnD, hn

  9. Lizonia baldini sobre Polytrichum formosum

    Girbal i Lladó, Josep; Lloret Maya, Francisco; Pérez Obiol, Ramon

    1982-01-01

    S'ha trobat al Montseny (UTM:DG 46 26) l'ascomicet briofil Lizonia baldini (Pir) Dobb (Ordre Dothideales) parasit sobre Polytrichum formosum Hedw. Es descriuen les característiques dels exemplars observats i s'indica la seva incidencia en la producció d'anteridis

  10. Visiones educativas sobre los MOOC

    Cabero Almenara, Julio

    2015-01-01

    Los “Cursos Masivos en Abiertos” o MOOC se están convirtiendo en una de las tecnologías de gran penetración en el terreno educativo en los últimos tiempos, considerándose por algunos como una tecnología que creará un tsunami sobre la educación

  11. Discurso sobre la historia colombiana

    Quijano Otero, José María

    2010-01-01

    Resumen de las lecciones de Historia Patria, desde la llegada de Colón hasta los primeros brotes independentistas. Sobre la manera de estudiar los hechos históricos: su enlace, las causas que los produjeron, i los efectos que de ellos derivaron.

  12. On the multi-index (3m-parametric) Mittag-Leffler functions, fractional calculus relations and series convergence

    Paneva-Konovska, Jordanka

    2013-10-01

    In this paper we consider a family of 3m-indices generalizations of the classical Mittag-Leffler function, called multi-index (3m-parametric) Mittag-Leffler functions. We survey the basic properties of these entire functions, find their order and type, and new representations by means of Mellin-Barnes type contour integrals, Wright pΨq-functions and Fox H-functions, asymptotic estimates. Formulas for integer and fractional order integration and differentiations are found, and these are extended also for the operators of the generalized fractional calculus (multiple Erdélyi-Kober operators). Some interesting particular cases of the multi-index Mittag-Leffler functions are discussed. The convergence of series of such type functions in the complex plane is considered, and analogues of the Cauchy-Hadamard, Abel, Tauber and Littlewood theorems are provided.

  13. Engineered proteins with Pumilio/fem-3 mRNA binding factor scaffold to manipulate RNA metabolism.

    Wang, Yang; Wang, Zefeng; Tanaka Hall, Traci M

    2013-08-01

    Pumilio/fem-3 mRNA binding factor proteins are characterized by a sequence-specific RNA-binding domain. This unique single-stranded RNA recognition module, whose sequence specificity can be reprogrammed, has been fused with functional modules to engineer protein factors with various functions. We summarize the advances made with respect to developing RNA regulatory tools, as well as opportunities for the future. PMID:23731364

  14. Tuning of the Thermoelectric Figure of Merit of CH$_3$NH$_3$MI$_3$ (M=Pb,Sn) Photovoltaic Perovskites

    Mettan, Xavier; Pisoni, Riccardo; Matus, Péter; Pisoni, Andrea; Jaćimović, Jaćim; Náfrádi, Bálint; Spina, Massimo; Pavuna, Davor; Forró, László; Horváth, Endre

    2015-01-01

    The hybrid halide perovskites, the very performant compounds in photovoltaic applications, possess large Seebeck coefficient and low thermal conductivity making them potentially interesting high figure of merit ($ZT$) materials. For this purpose one needs to tune the electrical conductivity of these semiconductors to higher values. We have studied the CH$_3$NH$_3$MI$_3$ (M=Pb,Sn) samples in pristine form showing very low $ZT$ values for both materials; however, photoinduced doping (in M=Pb) a...

  15. Fermi level tuning in (Y1-yMy)1-xUxPd3 (M=Th, La)

    The effects of the increase of the U 5f binding energy and the decrease in the localized U 5f electron-conduction electron hybridization on the Kondo temperature, with U intersite interactions held constant to first approximation, are under investigation by means of electrical resistivity, magnetic susceptibility, and specific heat as a function of y for fixed values of x in the (Y1-yMy)1-xUxPd3 (M=Th, La) systems. ((orig.))

  16. Separation of isotope mixtures of molecular hydrogen on NaX-3M zeolite. 2. Isotopic equilibrium

    Isotopic equilibrium in the molecular hydrogen-NaX-3M zeolite system was investigated. Sorption isotherms of H2, D2, HD, HT, DT, T2 on zeolite were used to calculate the dependencies of binary factors of separation of isotope mixtures of molecular hydrogen on temperature (30-100 K) and pressure (0.25x105-1x107 Pa), which were compared with experimentally obtained results. Satisfactory agreement of experimental and calculation data was obtained

  17. Room temperature syntheses and thermal behaviors of hydrogarnets Sr3M2(OH)12 (M = Al, Cr and Fe)

    Highlights: • All starting materials were common metal inorganic salts. • Hydrogarnets were synthesized by solid state reaction at room temperature. • The novel synthesis method has an advantage of quick reaction and easy operation. • As-synthesized hydrogarnets have different morphologies. - Abstract: Hydrogarnets Sr3M2(OH)12 (M = Al, Cr and Fe) were synthesized through a solid state reaction at room temperature with Al(NO3)3·9H2O, CrCl3·6H2O, FeCl3·6H2O, Sr(NO3)2 and NaOH as the starting materials. All X-ray diffraction (XRD) data of Sr3M2(OH)12 were indexed by the cubic system with the space group of Ia−3d. XRD, differential thermal analysis and thermogravimetric (DTA–TG), and scanning electron microscopy (SEM) were employed to investigate the structural stability, thermal properties and morphologies of Sr based hydrogarnets. The cause of room temperature synthesis and the thermal decomposition behaviors of Sr-based hydrogarnets Sr3M2(OH)12 (M = Al, Cr and Fe) are discussed

  18. Design of multichord Hα detector arrays for the U-3M torsatron and identification of rotating plasma perturbations

    Dreval, M. B.; Shapoval, A. M.; Ozherelyev, F. I.; Makhov, M. M.

    2016-07-01

    An Hα camera has been designed and installed in the U-3M torsatron for spatially and temporally resolved measurements. This device provides fast measurements of the emission brightness profile in the noisy environment of the radio frequency (RF) heated plasma. Unusual topology of diagnostics and the data acquisition system are applied. All the system components, including digitizers, are assembled in a single unit. It allows the suppression of a low-frequency electromagnetic interference by eliminating the ground loops. And the suppression of RF noises is achieved by eliminating the signal interface cables and digital interface cables in the design. The Wi-Fi interface is used to prevent a ground loop in the data transfer stage. The achieved sensitivity of our diagnostics is high enough for measuring the Hα emission from the low-density (ne ≈ (1-2)ṡ1010 cm-3) plasma with a temporal resolution of about 20 μs in the noisy environment. Different types of Hα emission fluctuations within the frequency range of 1-5 kHz and poloidal mode numbers m = 0 and m = 5 have been observed in U-3M. A simple technique of the line-of-sight data analysis, based on the U-3M magnetic surface asymmetry, is proposed and used for the spatial localization of the rotating mode and for the determination of mode numbers and its poloidal rotation direction using a single Hα array.

  19. SF3M 2.0: improvement of 3D photo-reconstruction interface based on freely available software

    Castillo, Carlos; James, Michael R.; Pérez, Rafael; Gómez, Jose A.

    2016-04-01

    During recent years, a number of tools based on Structure-from-Motion algorithms have been released for full image-based 3D reconstruction either freely (e.g. Bundler, PMVS2, VisualSFM, MicMac) or commercially (e.g. Agisoft PhotoScan). The SF3M interface was developed in Matlab® to use link software developments (VisualSFM, CloudCompare) and new applications to create a semi-automated workflow including reconstruction, georeferencing and point-cloud filtering, and has been tested for gully erosion assessment with terrestrial images (Castillo et al., 2015). The main aim of this work to provide an improved freely-available and easy-to-use alternative for 3D reconstruction intended for public agencies, non-profit organisations, researchers and other stakeholders interested in 3D modelling. In this communication we present SF3M 2.0, a new version of the graphical user interface. In this case, the SfM module is based on MicMac, an open-software tool (Pierrot-Deseilligny and Cléry, 2011) which provides advanced features such as camera calibration and constrained bundle adjustment using ground control points. SF3M 2.0 will be tested in two scenarios: a) using the same ground-based image set tested in Castillo et al. (2015) to compare the performance of both versions and b) using aerial images taken from a helium balloon to assess a gully network in a 40-hectares catchment. In this study we explore the advantages of SF3M 2.0, explain its operation and evaluate its accuracy and performance. This tool will be also available for free download. References Castillo, C., James, M.R., Redel-Macías, M. D., Pérez, R., and Gómez, J.A.: SF3M software: 3-D photo-reconstruction for non-expert users and its application to a gully network, SOIL, 1, 583-594. Pierrot-Deseilligny, M and Cléry, I. APERO, an Open Source Bundle Adjusment Software for Automatic Calibration and Orientation of a Set of Images. Proceedings of the ISPRS Commission V Symposium, Image Engineering and Vision

  20. Clinical significance of expression of Foxp3 mRNA in patients with asthma%哮喘患者外周血转录因子Foxp3mRNA表达水平及临床意义

    谭楠

    2012-01-01

    目的:探讨哮喘患者外周血叉头翼状螺旋转录因子3(Foxp3)mRNA表达水平及临床意义.方法:采用实时荧光定量PCR技术检测63例哮喘患者和40例正常对照组外周血中转录因子Foxp3 mRNA表达水平.结果:哮喘组患者外周血Foxp3 mRNA表达水平(0.32±0.13)较对照组(1.15±0.31)明显降低,差异有统计学意义(P<0.05);急性发作期患者外周血Foxp3 mRNA表达水平(0.22±0.06)较非急性发作期患者(0.47±0.15)明显降低,差异有统计学意义(P<0.05);急性发作期重度患者外周血Foxp3 mRNA表达水平(0.18±0.04)较对照组(0.29±0.07)明显降低,差异有统计学意义(P<0.05).结论:哮喘患者外周血中转录因子Foxp3 mRNA表达水平明显降低且与疾病分期及病情严重程度密切相关,Foxp3可能参与了哮喘发病过程.%Objective:To explore the expression of Foxp3 Mrna in peripheral blood from patients with asthma and its clinical significance. Methods: 63 patients with asthma and 40 controls were enrolled. The expressions of Foxp3 Mrna were analyzed by real-time PCR. Results:The Mrna levels of Foxp3 in peripheral blood from patients with asthma (0. 32 ± 0. 13) were significantly decreased. There were significantly different between the experimental group and control group (1. 15 ± 0. 31) (P <0. 05). The Mrna levels of Foxp3 in in peripheral blood from patients during acute phase (. 22 ± 0. 06) were in patients during chronic phase (0. 47+0. 15). The Mrna levels of Foxp3 in severe group (0. 18 ± 0. 04) were significantly decreased. There were significantly different between the severe group and slight, moderate group (0. 29 ± 0. 07) (P <0. 05). Conclusion:The Mrna levels of Foxp3 in peripheral blood from patients with asthma are significantly decreased and have association with disease stages and disease severity. Foxp3 may participate in the development of asthma.

  1. Bolt study - behaviour of bolts in drop accident scenarios of the Nirex 3m3 Box ILW package

    The mission of Nirex is to provide the UK with safe, environmentally sound and publicly acceptable options for the long-term management of radioactive materials. One of the key tasks is to ensure that waste is packaged by waste producers in a form which is suitable for safe storage, transport, handling and potential disposal. In pursuit of this key requirement, Nirex has developed specifications to set the standard for the design and performance of waste packages, and has developed standard containers for the packaging of intermediate level (ILW) and some low level waste (LLW) - one of these is the 3m3 Box for immobilised operational and decommissioning ILW. The dimension envelope of this package is 1716 mm x 1716 mm in plan with 430 mm corner radii, 1226 mm tall. The maximum loaded weight is 12 tonnes. A generic design of this container has been developed, which is a welded structure manufactured from austenitic stainless steel (EN 10088-2 steel number 1.4404). The lid is connected to the body by 28 stainless steel bolts. An extensive study was carried out to develop a robust FE model of the bolts. The specific focus of this work was to use improved bolt modelling to optimize the design of the 3m3 Box, although this work could be applied to other bolted containers. This paper presents a summary of the findings from the study as follows: 1. Development of a FE bolt model for application in a 3m3 Box model. 2. Development and execution of a bolt testing programme which included tensile and shear tests on a total of 88 bolts, representing four grades of stainless steel materials, three thread sizes, and two geometries at three strain rates. 3. Benchmarking of the FE bolt model that can be used with confidence in simulating waste package behaviour in drop scenarios

  2. Bolt study - behaviour of bolts in drop accident scenarios of the Nirex 3m{sup 3} Box ILW package

    Turner, G. [United Kingdom Nirex Ltd., Harwell (United Kingdom); Tso, C.F. [Arup, London (United Kingdom)

    2004-07-01

    The mission of Nirex is to provide the UK with safe, environmentally sound and publicly acceptable options for the long-term management of radioactive materials. One of the key tasks is to ensure that waste is packaged by waste producers in a form which is suitable for safe storage, transport, handling and potential disposal. In pursuit of this key requirement, Nirex has developed specifications to set the standard for the design and performance of waste packages, and has developed standard containers for the packaging of intermediate level (ILW) and some low level waste (LLW) - one of these is the 3m{sup 3} Box for immobilised operational and decommissioning ILW. The dimension envelope of this package is 1716 mm x 1716 mm in plan with 430 mm corner radii, 1226 mm tall. The maximum loaded weight is 12 tonnes. A generic design of this container has been developed, which is a welded structure manufactured from austenitic stainless steel (EN 10088-2 steel number 1.4404). The lid is connected to the body by 28 stainless steel bolts. An extensive study was carried out to develop a robust FE model of the bolts. The specific focus of this work was to use improved bolt modelling to optimize the design of the 3m{sup 3} Box, although this work could be applied to other bolted containers. This paper presents a summary of the findings from the study as follows: 1. Development of a FE bolt model for application in a 3m{sup 3} Box model. 2. Development and execution of a bolt testing programme which included tensile and shear tests on a total of 88 bolts, representing four grades of stainless steel materials, three thread sizes, and two geometries at three strain rates. 3. Benchmarking of the FE bolt model that can be used with confidence in simulating waste package behaviour in drop scenarios.

  3. First-order ion-optics calculations for an Accelerator Mass Spectrometry system using SRIM and S3M

    In this paper, we describe the transport of a simulated beam, created with the S3M beam generation module, along the real beam line of the Accelerator Mass Spectrometry (AMS) facility located at Centro Nacional de Aceleradores (CNA, Seville, Spain). The beam transport through the optical system was determined using the transfer-matrix method, which can easily calculate the beam envelopes without having to track all individual particles, evaluating the ability of such systems and saving computation time. The beam size results given by S3M were compared to the real beam size in three of the four image points that the system has (P1, P2 and P3), corresponding with the position of Faradays Cups where the 127I current was measured, obtaining a good agreement between them. This suggests that the first order approximation model is enough to simulate the optical behavior of the system. It is shown that the beam line has a focusing behavior, minimizing the beam size from ±3 mm at the exit of the ion source to ±1.09 mm at the detector’s entrance window. Using the beam emittance diagram simulations, it is shown that when ions pass through the stripper, the angles of their trajectories are altered by scattering with the gas molecules and the geometrical emittance enlarges, according to Liouville’s Theorem. The study presented in this work gives confidence and open new perspectives in simulations with S3M in AMS facilities contributing to the understanding of their optical behavior.

  4. Structural, electronic and optical properties of Li intercalated on MO3 (M: Mo, W): A first principle investigation

    Mahmoudi, A.; Faraoun, H. I.; Benabadji, M. K.; Abdellaoui, I.; Dergal, M.

    2016-03-01

    The correlations between electronic and optical properties of pure MO3 (M=Mo, W) and the effect of Li intercalated in the matrix are investigated within density functional theory using both the revised gradient-corrected Perdew-Burke-Ernzerhof (GGA-PBE), GGA+U and HSE06 functional frameworks along with ab initio pseudopotentials method. Calculation performed with HSE06 functional proves that all these compounds are wide band gap semiconductors. The energy gap value is found to decrease with lithium incorporation, affecting the visible absorption coefficients.

  5. Extension of Studies with 3M Empore TM and Selentec MAG *SEP SM Technologies for Improved Radionuclide Field Sampling

    Beals, D.M. [Westinghouse Savannah River Company, AIKEN, SC (United States); Bibler, J.P.; Brooks, D.A.

    1996-07-10

    The Savannah River Technology Center is evaluating new field sampling methodologies to more easily determine concentrations of radionuclides in aqueous systems. One methodology studied makes use of 3M EmporeTM disks. The disks are composed of selective resins embedded in a Teflon support. The disks remove the ion of interest from aqueous solutions when the solution is passed through the disk. The disk can then be counted directly to quantify the isotope of interest. Four types of disks were studied during this work: for the extraction of technetium (two types), cesium, plutonium, and strontium. A sampler has been developed for automated, unattended, in situ use of the EmporeTM disks.

  6. FABRICATION OF A 3 m Ø x 5 m SUPERCONDUCTING SOLENOID FOR THE FERMILAB COLLIDER DETECTOR FACILITY

    Minemura, H.; Mori, S.; Yoshizaki, R.; Kondo, K.(Yamagata University, Yamagata, 992-8510, Japan); Fast, R; Kephart, R.; Wands, R.; Yamada, R.

    1984-01-01

    The 3mØ x 5m (1.5 Tesla) superconducting solenoid for the Fermilab Collider Detector Facility (CDF) is under construction in Japan. The coil consists of a single layer aluminum-stabilized monolithic NbTi/Cu superconductor fabricated with the EFT (extrusion with front tension) method. The forced flow cooling method of two-phase helium is used. In order to minimize the material thickness of the solenoid the coil is built without a permanent inner bobbin. The radial electromagnetic forces are su...

  7. Design and performance estimate of a focal reducer for the 2.3 m Thai National Telescope.

    Buisset, Christophe; Deboos, Alexis; Lépine, Thierry; Poshyachinda, Saran; Soonthornthum, Boonrucksar

    2016-01-25

    We have designed a new kind of focal reducer for the 2.3 m Thai National Telescope (TNT) to image the TNT specified FOV Δθ = 14.6' with an angular resolution α ≈1.2 arcsec. This, at a minimum cost by using common glasses, spherical surfaces and by requiring comfortable mechanical tolerance. This focal reducer comprises 1 lens placed at the level of the fork entrance and 1 lens placed in front of the detector. In this paper, we present the focal reducer paraxial model, we describe the optical design and we present the performance. PMID:26832523

  8. MRI of the lung using hyperpolarized He-3 at very low magnetic field (3 mT)

    Bidinosti, C P; Tastevin, G; Vignaud, A; Nacher, P J

    2004-01-01

    Optical pumping of He-3 produces large (hyper) nuclear-spin polarizations independent of the magnetic resonance imaging (MRI) field strength. This allows lung MRI to be performed at reduced fields with many associated benefits, such as lower tissue susceptibility gradients and decreased power absorption rates. Here we present results of 2D imaging as well as accurate 1D gas diffusion mapping of the human lung using He-3 at very low field (3 mT). Furthermore, measurements of transverse relaxation in zero applied gradient are shown to accurately track pulmonary oxygen partial pressure, opening the way for novel imaging sequences.

  9. Mutual transformation of light waves by reflection holograms in photorefractive crystals of the 4-bar 3m symmetry

    Naunyka, V. N.; Shepelevich, V. V., E-mail: vasshep@inbox.ru [Mozyr State Pedagogical University (Belarus)

    2011-05-15

    The mutual transformation of light waves in the case of their simultaneous diffraction from a bulk reflection phase hologram, which was formed in a cubic photorefractive crystal of the 4-bar 3m symmetry class, has been studied. The indicator surfaces of the polarization-optimized values of the relative intensity of the object wave, which make it possible to determine the amplification of this wave for any crystal cut, are constructed. The linear polarization azimuths at which the energy exchange between the light waves reaches a maximum are found numerically for crystals of different cuts.

  10. Interactions among three proteins that specifically activate translation of the mitochondrial COX3 mRNA in Saccharomyces cerevisiae.

    Brown, N.G.; Costanzo, M. C.; Fox, T D

    1994-01-01

    The PET54, PET122, and PET494 proteins, which are associated with the yeast inner mitochondrial membrane, specifically activate translation of the mitochondrially encoded COX3 mRNA. We used the two-hybrid system to test whether pairs of these proteins, when fused to either the GAL4 DNA-binding or transcriptional activating domain, can physically associate as measured by the expression of the GAL4-dependent reporter, lacZ. PET54 and PET122 interacted in this system, and an amino-terminally tru...

  11. Extension of Studies with 3M Empore TM and Selentec MAG *SEP SM Technologies for Improved Radionuclide Field Sampling

    The Savannah River Technology Center is evaluating new field sampling methodologies to more easily determine concentrations of radionuclides in aqueous systems. One methodology studied makes use of 3M EmporeTM disks. The disks are composed of selective resins embedded in a Teflon support. The disks remove the ion of interest from aqueous solutions when the solution is passed through the disk. The disk can then be counted directly to quantify the isotope of interest. Four types of disks were studied during this work: for the extraction of technetium (two types), cesium, plutonium, and strontium. A sampler has been developed for automated, unattended, in situ use of the EmporeTM disks

  12. OBSL1 mutations in 3-M syndrome are associated with a modulation of IGFBP2 and IGFBP5 expression levels

    Huber, Celine; Fradin, Mélanie; Edouard, Thomas; Le Merrer, Martine; Alanay, Yasemin; Da Silva, Daniela Bezerra; David, Albert; Hamamy, Hanan; van Hest, Liselotte; Lund, Allan M; Michaud, Jacques; Oley, Christine; Patel, Chirag; Rajab, Anna; Skidmore, David L; Stewart, Helen; Tauber, Maité; Munnich, Arnold; Cormier-Daire, Valerie

    2010-01-01

    3-M syndrome is an autosomal recessive disorder characterized by severe pre- and postnatal growth retardation and minor skeletal changes. We have previously identified CUL7 as a disease-causing gene but we have also provided evidence of genetic heterogeneity in the 3-M syndrome. By homozygosity m...... mutations (p.F697G; p.H814RfsX15). We found normal CUL7 mRNA levels but abnormal IGFBP2 and IGFBP5 mRNA levels in the two patients, suggesting that OBSL1 modulates the expression of IGFBP proteins....... mapping in two inbred families, we found a second disease locus on chromosome 2q35-36.1 in a 5.2-Mb interval that encompasses 60 genes. To select candidate genes, we performed microarray analysis of cultured skin fibroblast RNA from one patient, looking for genes with altered expression; we found...... decreased expression of IGFBP2 and increased expression of IGFBP5. However, direct sequencing of these two genes failed to detect any anomaly. We then considered other candidate genes by their function/location and found nine distinct mutations in the OBSL1 gene in 13 families including eight nonsense and...

  13. STUDY OF MORPHOLOGICAL CHANGES OF HEART IN VIRAL MYOCARDITIS CAUSED BY REPETITIVE INFECTION OF CVB3m

    2006-01-01

    Objective To investigate the morphological changes of heart in viral myocarditis caused by repetitive infection of CVB3m. Methods 4-week-old mice were infected four times intraperitoneally with a timedependent dose and killed at the 10th,30th and 60th day after the final infection respectively, then we examined the heart changes and collagen hyperplasia by HE, VG stain and IHC. Results Heart damage appeared very serious at the tenth day, even there were small necrotic foci at the day of 30th, but we could not see any injury of heart 2 months later after final infection. Collagen turned up at the tenth day and there was much more collagen in heart and increased PCVA, CVF index at the sixtieth day. The IHC of collagen demonstrated the collagen Ⅰ hyperplasia was much obvious compared to collagen Ⅲ. Conclusion It strongly indicated that repetitive infection of CVB3m could lead to heart fibrosis and ventricular remodeling, which resulted in decreased systolic and diastolic function of heart.

  14. PARTICIPAÇÃO DO CONSUMIDOR NO DESENVOLVIMENTO DO SISTEMA LINUX: APLICAÇÃO DO 3M DE MOWEN

    Alexandre Eugenio Pieske

    2012-03-01

    Full Text Available Este trabalho investiga o prosumidor, indivíduo parte produtor, parte consumidor. Para entender seu comportamento, selecionou-se o 3M (Modelo Metateórico de Motivação e Personalidade, de Mowen (2000, adaptado por Monteiro (2006, que interpreta o comportamento do consumidor por traços de personalidade. O objeto de estudo são prosumidores do Linux, já que este sistema operacional possibilita livre modifi cação. Foi realizada pesquisa em duas etapas: qualitativa preparatória e quantitativa, para testar a aplicação do modelo. Foram realizadas entrevistas individuais com usuários Linux, resultando na identifi cação de cinco níveis de participação. Na segunda fase, foi aplicado um survey, pela Internet, a membros de comunidades Linux. Por meio de modelagem em equações estruturais, o 3M foi aplicado, fazendo-se os devidos ajustes. Apesar de os coefi cientes de determinação terem sido signifi cativos, alguns índices de ajuste apresentaram-se baixos.

  15. SNaPshot技术检测Y-SNP位点O3-M122单倍群的应用%The application of Y-SNP genotyping by SNaPshot assay under the O3-M122 haplogroup

    孙亚男; 李安; 史斌; 董庆旭; 李貌; 何玮; 翟滇; 程宝文

    2013-01-01

    目的 采用SNaPshot技术检测案例检材O3-M122位点6个亚群的分型,并调查其在云南3个民族无关男性人群中的频率分布.方法 建立5-plex Y-SNPs复合扩增体系,采用SNaPshot Multiplex试剂盒,检测案例检材O3-M122单倍群下O3*-M122、O3a*-M324、O3a3*-P201、O3a3b*-M7、O3a3c*-M134、O3a3c1*-M117共6个Y-SNPs分型,并对上述6个Y-SNPs在云南佤族、白族、傣族共174名无关男性个体中的分布进行调查.结果 17份案例检材均得到良好的分型结果.上述3个民族分别在3个、5个、5个位点上发现多态性,其中佤族O3a3*-P201分布频率最高(0.430 0);白族O3a*-M324频率最高(0.2123);傣族O3a3c1*-M117频率最高(0.158 2).结论 多重PCR反应及SNaPshot技术的联合应用适用于法医案件检材DNA检测,3个民族多态性数据可为相关应用所参考.

  16. Measurements of radiation exposure on commercial aircraft with the LIULIN-3M instrument; Mesure de l'exposition aux radiations sur les vols commerciaux avec l'equipement LIULIN-3M

    Stassinopoulos, E.G. [NASA Centre des Vols Spatiaux Goddard, Greenbelt, MD (United States); Stauffer, C.A. [Stinger Gaffarian Technologies, Greenbelt, MD (United States); Dachev, T.P.; Tomov, B.T.; Dimitrov, P.G. [Academie des Sciences, Bulgarie, Lab. d' Etudes des Influences Soleil-Terre, Sofia (Bulgaria); Brucker, G.J. [Radiation Effects Consultants, Inc., West Long Branch, NJ (United States)

    1999-07-01

    The LIULIN-3M evolved from an international cooperative project by a group of Bulgarian, Russian, German, and American scientists. The radiometer is a low power, small size, light weight, and low cost instrument composed of a solid state detector (SSD) with supporting electronics that enable it to operate as a pulse height analyzer of energy deposited in the detector, and to obtain from these measurements the total dose or the dose rate produced by charged particles. The instrument has also been used as a low-LET radiation spectrometer for measuring biological doses of potential human exposures. A flash memory allows self-storage of data during flights and post flight retrieval. Results will be presented and discussed. (author)

  17. Phycocyanin for protecting brain ischemia-reperfusion injury and its effect on the expression of Caspase-3 mRNA

    Xuewei Yang; Yunliang Guo; Hongbing Chen

    2006-01-01

    BACKGROUND: Phycocyanin can anti-oxidize and clear free radial. Whether its protective effect on brain is related to Caspase-3, the promoter and operator of apoptosis, is highly concerned.OBJECTIVE: To observe phycocyanin for protecting nerve function and reducing the size of cerebral infarction of rats with brain ischemia-reperfusion and its effect on the expression of Caspase-3 mRNA.DESIGN: A randomized controlled experiment.SETrING: Institute of Cerebrovascular Disease, Affiliated Hospital of Medical College of Qingdao University.MATERIALS: Totally 84 adult healthy female Wistar rats, weighing 210 to 250 g, of clean grade, were provided by the Animal Experimental Center of Shandong University. Phycocyanin (Institute of Oceanography of Chinese Academy of Sciences) was used.METHODS: This experiment was carried out in the Key Laboratory for Prevention and Treatment of Brain Diseases during May to December 2005. ① The rats were randomized into sham-operation group (n=4),control group (n=40) and phycocyanin-treated group (n=40). Middle cerebral artery occlusion/reperfusion (MACO/R) models were created on the rats of control and phycocyanin-treated groups with suture-occluded method by inserting a thread into left side external-internal carotid artery. In the sham-operation group, inserting suture was omitted. After ischemia for 1 hour and reperfusion for 2 hours, suspension of phycocyanin was intragastrically administrated into the rats of the phycocyanin-treated group at 100 mg/kg , and the same volume of normal saline was isochronously administrated into the rats of control group as the same. ② Six rats were chosen respectively from the control group and phycocyanin-treated group, then neurologic impairment degrees of rats were evaluated according to Bederson's grading. ③ Six rats were chosen respectively from the control and phycocyanin-treated groups. The isolated brain tissue was stained with triphenyltetrazolium chloride, and then the size of cerebral

  18. Historicismo: notas sobre um paradigma

    José D’Assunção Barros

    2012-01-01

    Este artigo tem por objetivo desenvolver algumas considerações sobre o Historicismo e sua possibilidade de ser examinado como um dos paradigmas que concorrem para o estabelecimento de uma história científica no século XIX. O primeiro ponto tratado é relativo às origens do paradigma Historicista na transição do século XVIII para o século XIX. Na sequência, aproximamo-nos da apropriação conservadora do paradigma historicista no novo contexto no qual a burguesia européia está assentada no Poder,...

  19. COMENTARIOS SOBRE MEMORIA Y COMUNIDAD

    José A. Escalona Delfino

    2009-01-01

    El presente trabajo es una reflexión sobre aspectos esenciales en torno a la relación memoria-comunidad y su importancia para la investigación científica de las sociedades y los grupos humanos. Sin penetrar en profundidad en la trayectoria histórica del tema, ni en el tratamiento específico que importantes hombres de ciencia, considerados sus progenitores o procreadores, han dado a estos conceptos, hacemos particulares consideraciones con respecto al concepto de Memoria Histórica o Colectiva....

  20. Nota sobre Keynes y Brentano

    Crespo, Ricardo F.; IAE (Universidad Austral) y CONICET

    2013-01-01

    Este trabajo explora la posibilidad de una relación entre el pensamiento de John Maynard Keynes y el del filósofo alemán Franz Brentano (1839-1917) en los campos lógico y epistemológico. George E. Moore -profesor de Keynes- y Keynes mismo leyeron y alabaron el libro de Brentano El origen del conocimiento moral (1889). ¿Tomó Keynes algunas ideas lógicas o epistemológicas de Brentano? El trabajo sugiere que, a pesar de ciertas similitudes entre las ideas lógicas y sobre la verdad de Keynes y Br...

  1. Thomas Hobbes: sobre el miedo

    Carlos Bührle

    2004-01-01

    Este trabajo pretende echar cierta luz sobre el papel del miedo en el pensamiento político de Hobbes. Sabido es que esta pasión subyace al contrato social, en el sentido de que impulsa al hombre a abandonar el estado de naturaleza a fin de encontrar seguridad y de deshacerse de la amenaza de la muerte violenta. Teniendo en cuenta que el miedo y la muerte son inseparables en la filosofía de Hobbes, surge una pregunta fundamental: ¿hasta qué punto podemos decir que el miedo desaparece completam...

  2. Sobre la crisis financiera internacional

    Antonio Torrero Mañas

    2013-01-01

    Este trabajo es una reflexión sobre la crisis financiera internacional en la mitad de su sexto año. Respecto a la evolución de la crisis tengo una sensación agridulce. La parte positiva es que se ha evitado un descalabro inmediato de gran entidad. Mi mayor inquietud procede de los desequilibrios que pueden provocar las finanzas internacionales sin que exista ninguna institución moderadora y ordenadora de los flujos con un ámbito supranacional. Creo que una fuente válida de inspiración serí...

  3. Lumbalgias en hockey sobre cesped

    Rodríguez, Claudia

    2011-01-01

    Se realizó un estudio tomando como muestra a 84 jugadoras de hockey sobre hierba amateurs, mayores de 18 años de la primera categoría de la ciudad de Mar del Plata, en la cual el objetivo general fue determinar la incidencia del gesto deportivo en las lumbalgias de dichas jugadoras. El dolor lumbar tiene una alta prevalencia entre los deportistas, se ha relacionado con déficits en la fuerza extensora lumbar, y el hecho de padecerlo representa un obstáculo importante para la ...

  4. Modelos ambientales sobre la vejez

    Izal, María; Fernández-Ballesteros, Rocío

    1990-01-01

    La perspectiva ambiental en el estudio de la vejez es probablemente un ámbito poco conocido. En este trabajo se expone una revisión crítica de los principales modelos de explicación de las relaciones ambiente-conducta en la vejez. Finalmente, se discute sobre la superación de algunas limitaciones presentes en estas formulaciones teóricas, presentándose posibles alternativas teóricas y metodológicas para el desarrollo de esta área.

  5. Entorno colaborativo sobre laboratorios remotos

    Grosclaude, Eduardo; Sznek, Jorge Eduardo; Ramos Garcia, Vicente; Bertogna, Mario Leandro; López Luro, Francisco; Zanellato, Claudio

    2006-01-01

    El proyecto de investigación Software para Procesos Colaborativos incluye una línea de acción sobre el desarrollo de experiencias en Laboratorios Remotos. Esta línea está dedicada a complementar las tareas de aprendizaje con un soporte tecnológico de sistemas, entendido como todas aquellas actividades de infraestructura que promuevan la disponibilidad de recursos y apoyen la escalabilidad de procesos en la tarea educativa apuntalada por tecnologías de información. En este trabajo se describe ...

  6. Nonlinear elastic properties of superconducting antiperovskites MNNi 3 (M =Zn, Cd, Mg, Al, Ga, and In) from first principles

    Liu, Lili

    2014-05-22

    We present theoretical studies for the third-order elastic constants (TOECs) of superconducting antiperovskites MNNi 3 (M = Zn, Cd, Mg, Al, Ga, and In) using the density functional theory (DFT) and homogeneous deformation method. From the nonlinear least-square fitting, the elastic constants are extracted from a polynomial fit to the calculated strain-energy data. Calculated second-order elastic constants (SOECs) are compared with the previous theoretical calculations, and a very good agreement was found. The nonlinear effects often play an important role when the finite strains are larger than approximately 2.5 %. Besides, we have computed the pressure derivatives of SOECs and provided rough estimations for the Grüneisen constants of long-wavelength acoustic modes by using the calculated TOECs. © 2014 Springer Science+Business Media New York.

  7. Automated IBM PC/XT/AT based measurement and control system for the DRON-3M X-ray diffractometer

    An automated IBM PC/XT/AT based measurement and control system for the DRON-3M X-ray diffractometer is decribed. The system permits carrying out of real time diffractometer control automatic X-spectra measurement and data acquisition, as well as experimental information computing and representation. The electronic of the system consists of a CAMAC crate with analog and power modules, and a control and measurement organization module, performed as a single bord in the standard of PC electronics. The system provides X-spectra acquisition with volume up to 4K in the angle range from 100 to 160 degrees with a resolution of 0.01 degree, a dead time less than 1mks and an exposition time from tenths of a second to dozens of minutes. 3 refs.; 5 figs

  8. Trends in (LaMnO3)n/(SrTiO3)m superlattices with varying layer thicknesses

    Jilili, J.

    2015-09-01

    We investigate the thickness dependence of the structural, electronic, and magnetic properties of (LaMnO3)n/(SrTiO3)m (n, m = 2, 4, 6, 8) superlattices using density functional theory. The electronic structure turns out to be highly sensitive to the onsite Coulomb interaction. In contrast to bulk SrTiO3, strongly distorted O octahedra are observed in the SrTiO3 layers with a systematic off centering of the Ti atoms. The systems favour ferromagnetic spin ordering rather than the antiferromagnetic spin ordering of bulk LaMnO3 and all show half-metallicity, while a systematic reduction of the minority spin band gaps as a function of the LaMnO3 and SrTiO3 layer thicknesses originates from modifications of the Ti dxy states.

  9. Characteristics of the three-half-turn-antenna-driven RF discharge in the Uragan-3M torsatron

    Grigor’eva, L. I.; Chechkin, V. V., E-mail: chechkin@ipp.kharkov.ua; Moiseenko, V. E.; Grekov, D. L.; Pavlichenko, R. O.; Lozin, A. V.; Tarasov, I. K.; Kulaga, A. Ye.; Zamanov, N. V.; Tretiak, K. K.; Kozulya, M. M.; Beletskii, A. A.; Kasilov, A. A.; Mironov, Yu. K.; Romanov, V. S.; Voitsenya, V. S. [National Science Center Kharkiv Institute of Physics and Technology, Institute of Plasma Physics (Ukraine)

    2015-12-15

    In the ℓ = 3 Uragan-3M torsatron hydrogen plasma is produced by RF fields in the Alfvén range of frequencies (ω ≤ ω{sub ci}). The initial (target) plasma with the line-averaged density of units 10{sup 12} cm{sup −3} is produced by a frame antenna with a broad spectrum of generated parallel wavenumbers. After this, to heat the plasma and bring its density to ∼10{sup 13} cm{sup –3}, another, shorter wavelength three-half-turn antenna with large transverse currents is used. The behavior of the density, electron temperature, and loss of the plasma supported by the three-half-turn antenna is studied depending on the RF power fed to the antenna and initial values of the density and electron temperature supplied by the frame antenna.

  10. The over 3 m long SV25 steel props at an experimental stand and in underground site testing

    Homel, J.; Labonski, S.; Kozlowski, A.

    1991-07-01

    Presents results of an experimental stand and underground tests of installing long SV25 props in over 3 m high workings. Bench tests showed the bearing capacity of 3.5-4.86 m high props to be 285 kN on average for the first stage up to the point of sliding in joints and 160 kN in the second phase after straightening of stirrups. Characteristics of bending tests are also presented. Field tests were conducted in the Moszczenica black coal mine with satisfactory results. The conclusion is reached that props with two stirrups should be used only as auxiliary support reinforcement while application of a third stirrup is recommended if they are used as basic support elements. Application of double-yoke stirrups is also recommended. 3 refs.

  11. Evaluation of the 3M Petrifilm Enterobacteriaceae Count plate method for the enumeration of Enterobacteriaceae in foods.

    Silbernagel, Karen M; Lindberg, Kathryn G

    2002-09-01

    Results of the 3M Petrifilm Enterobacteriaceae Count (EB) plate method were compared with those of the standard violet red bile glucose agar (VRBG) method for the detection and enumeration of Enterobacteriaceae. Studies involving 107 bacterial strains demonstrated that the Petrifilm EB plate method is as sensitive as and more selective than the VRBG method. Sixty of the 62 pure Enterobacteriaceae cultures were recovered by both methods. In addition, 38 of the 45 non-Enterobacteriaceae organisms did not grow on the Petrifilm EB plate, while 28 of the 45 non-Enterobacteriaceae organisms did not grow on the VRBG plate. Colony counts from 174 naturally contaminated and 120 artificially inoculated dairy and nondairy food samples showed that the Petrifilm EB plate method performed as well as or better than the standard VRBG method for the enumeration of Enterobacteriaceae. PMID:12233857

  12. Theoretical prediction of structural, elastic and electronic properties of M5Si3 (M = Ti, Zr) compounds

    Structural, elastic, electronic and mechanical properties of the M5Si3 (M = Ti, Zr) compounds with (Mn5Si3) 16H crystal structure have been studied with respect to pressure. Our computational method is based on a pseudo-potential plane-wave (PP-PW) method. The exchange correlation has been treated using the generalized gradient approximation (GGA) in order to work out the densities of states. Ground-state quantities, such as lattice parameter and bulk modulus, have been evaluated, as well as elastic constants and their pressure derivative. Elastic constants and their pressure dependence have been calculated. Also, bulk and shear moduli, Young' modulus and Poisson's ratio for ideal polycrystalline phases have been derived. (author)

  13. Luminescence properties of Na3YSi3O9:M3+ (M = Sm, Tb, Tm) glass ceramics

    Highlights: •Sm3+, Tb3+, or Tm3+ doped-Na3YSi3O9 GC emit reddish, green, or blue light, respectively. •Emission intensities of these glass ceramics are superior to corresponding phosphors. •Color tones of Na3YSi3O9:Sm3+, Tb3+, Tm3+ GC can be changed from warm white to cool white. •These glass ceramics have potential application in white LED devices. -- Abstract: The transparent Na3YSi3O9:M3+ (M = Sm, Tb, Tm) glass ceramics were prepared by high temperature melting with a heat-treatment at 750 °C. X-ray diffraction, transmission electron microscopy, and photoluminescence spectroscopy were used to investigate their structure and optical properties. The M3+ ions were introduced as luminescence centers into the Na3YSi3O9 glass ceramics. Under ultraviolet (UV) excitation, the Na3YSi3O9:Sm3+, Na3YSi3O9:Tb3+, and Na3YSi3O9:Tm3+ glass ceramics exhibited the characteristic transitions of Sm3+ (4G5/2 → 6HJ, J = 5/2 and 7/2), Tb3+ (5D4 → 7FJ, J = 6, 5 and 4), and Tm3+ (1D2 → 3F4), respectively. The color tones of Na3YSi3O9:Sm3+, Tb3+, Tm3+ glass ceramic changed from cool white (0.2589, 0.3119) to warm white (0.3231, 0.4491) by adjusting the excitation wavelength. The results indicated that the Na3YSi3O9:M3+ (M = Sm, Tb, Tm) glass ceramic is a potential matrix material for white light-emitting diodes (LEDs) under UV-LED excitation

  14. Overview of the O3M SAF GOME-2 operational atmospheric composition and UV radiation data products and data availability

    S. Hassinen

    2015-07-01

    Full Text Available The three GOME-2 instruments will provide unique and long data sets for atmospheric research and applications. The complete time period will be 2007–2022, including the period of ozone depletion as well as the beginning of ozone layer recovery. Besides ozone chemistry, the GOME-2 products are important e.g. for air quality studies, climate modeling, policy monitoring and hazard warnings. The heritage for GOME-2 is in the ERS/GOME and Envisat/SCIAMACHY instruments. The current Level 2 (L2 data cover a wide range of products such as trace gas columns (NO2, BrO, H2CO, H2O, SO2, tropospheric columns of NO2, total ozone columns and vertical ozone profiles in high and low spatial resolution, absorbing aerosol indices from the main science channels as well as from the polarization channels (AAI, AAI-PMD, Lambertian-equivalent reflectivity database, clear-sky and cloud-corrected UV indices and surface UV fields with different weightings and photolysis rates. The Ozone Monitoring and Atmospheric Composition Satellite Application Facility (O3M SAF processing and data dissemination is operational and running 24/7. Data quality is quarantined by the detailed review processes for the algorithms, validation of the products as well as by a continuous quality monitoring of the products and processing. This is an overview paper providing the O3M SAF project background, current status and future plans to utilization of the GOME-2 data. An important focus is the provision of summaries of the GOME-2 products including product principles and validation examples together with the product sample images. Furthermore, this paper collects the references to the detailed product algorithm and validation papers.

  15. Overview of the O3M SAF GOME-2 operational atmospheric composition and UV radiation data products and data availability

    Hassinen, S.; Balis, D.; Bauer, H.; Begoin, M.; Delcloo, A.; Eleftheratos, K.; Gimeno Garcia, S.; Granville, J.; Grossi, M.; Hao, N.; Hedelt, P.; Hendrick, F.; Hess, M.; Heue, K.-P.; Hovila, J.; Jønch-Sørensen, H.; Kalakoski, N.; Kauppi, A.; Kiemle, S.; Kins, L.; Koukouli, M. E.; Kujanpää, J.; Lambert, J.-C.; Lang, R.; Lerot, C.; Loyola, D.; Pedergnana, M.; Pinardi, G.; Romahn, F.; van Roozendael, M.; Lutz, R.; De Smedt, I.; Stammes, P.; Steinbrecht, W.; Tamminen, J.; Theys, N.; Tilstra, L. G.; Tuinder, O. N. E.; Valks, P.; Zerefos, C.; Zimmer, W.; Zyrichidou, I.

    2016-02-01

    The three Global Ozone Monitoring Experiment-2 instruments will provide unique and long data sets for atmospheric research and applications. The complete time period will be 2007-2022, including the period of ozone depletion as well as the beginning of ozone layer recovery. Besides ozone chemistry, the GOME-2 (Global Ozone Monitoring Experiment-2) products are important e.g. for air quality studies, climate modelling, policy monitoring and hazard warnings. The heritage for GOME-2 is in the ERS/GOME and Envisat/SCIAMACHY instruments. The current Level 2 (L2) data cover a wide range of products such as ozone and minor trace gas columns (NO2, BrO, HCHO, H2O, SO2), vertical ozone profiles in high and low spatial resolution, absorbing aerosol indices, surface Lambertian-equivalent reflectivity database, clear-sky and cloud-corrected UV indices and surface UV fields with different weightings and photolysis rates. The Satellite Application Facility on Ozone and Atmospheric Chemistry Monitoring (O3M SAF) processes and disseminates data 24/7. Data quality is guaranteed by the detailed review processes for the algorithms, validation of the products as well as by a continuous quality monitoring of the products and processing. This paper provides an overview of the O3M SAF project background, current status and future plans for the utilisation of the GOME-2 data. An important focus is the provision of summaries of the GOME-2 products including product principles and validation examples together with sample images. Furthermore, this paper collects references to the detailed product algorithm and validation papers.

  16. Recursos y enlaces sobre comunidades de aprendizaje

    Ferrer Esteban, Gerard

    2005-01-01

    Obras y artículos sobre el proyecto Comunidades de Aprendizaje desarrollado en el Estado español. Tesis doctorales sobre comunidades de aprendizaje. Fundamentación teórica de las comunidades de aprendizaje. Sitios en Internet relacionados con las comunidades de aprendizaje y proyectos afines de desarrollo comunitario en contextos escolares.

  17. On GAMER, plataforma de continguts sobre videojocs

    Villegas Bonachera, José Ricardo

    2015-01-01

    Desenvolupament d'una plana web amb disseny responsiu sobre videojocs en català a partir del gestor de continguts WordPress. Desarrollo de una página web con diseño responsivo sobre videojuegos en catalán a partir del gestor de contenidos WordPress. Bachelor thesis for the Multimedia program on Computer Science.

  18. Historicismo: notas sobre um paradigma

    José D’Assunção Barros

    2012-08-01

    Full Text Available Este artigo tem por objetivo desenvolver algumas considerações sobre o Historicismo e sua possibilidade de ser examinado como um dos paradigmas que concorrem para o estabelecimento de uma história científica no século XIX. O primeiro ponto tratado é relativo às origens do paradigma Historicista na transição do século XVIII para o século XIX. Na sequência, aproximamo-nos da apropriação conservadora do paradigma historicista no novo contexto no qual a burguesia européia está assentada no Poder, combinando-se com a consolidação dos modernos estados-nações. A especificação das características deste paradigma constituem o principal ponto de análise

  19. SOLITONS: Dark spatial optical solitons in planar gradient waveguides in the Z-cut of the 3m symmetry crystals

    Frolova, M. N.; Borodin, M. V.; Shandarov, S. M.; Shandarov, V. M.; Larionov, Yu M.

    2003-11-01

    The propagation of light beams is studied in a planar photorefractive waveguide fabricated by high-temperature diffusion of metal ions in the Z-cut substrate of the 3m symmetry crystal. The wave equations are obtained for single-mode light beams with TE and TM polarisations in planar diffusion waveguides, which take into account the two-dimensional distribution of the optical field. Expressions are found for a nonlinear change in the refractive index when the photovoltaic mechanism makes a dominant contribution to the photorefractive effect. The propagation of single-mode light beams is analysed numerically for a Ti:Fe:LiNbO3 waveguide fabricated by the successive diffusion of titanium and iron into lithium niobate. It is shown that single-mode light beams with a smooth amplitude envelope can propagate without significant changes in the region of a dip in the intensity modelling a dark soliton. The relations between the amplitude and width of a dark spatial soliton are obtained for the TM modes of a photorefractive planar waveguide.

  20. The Horizontal Branch in the UV Colour Magnitude Diagrams. II. The case of M3, M13 and M79

    Dalessandro, Emanuele; Ferraro, Francesco R; Mucciarelli, Alessio; Cassisi, Santi

    2012-01-01

    We present a detailed comparison between far-UV/optical colour Magnitude Diagrams obtained with high-resolution Hubble Space Telescope data and suitable theoretical models for three Galactic Globular Clusters: M3, M13 and M79. These systems represents a classical example of clusters in the intermediate metallicity regime that, even sharing similar metal content and age, show remarkably different Horizontal Branch morphologies. As a consequence, the observed differences in the colour distributions of Horizontal Branch stars cannot be interpreted in terms of either first (metallicity) or a second parameter such as age. We investigate here the possible role of variations of initial Helium abundance (Y). Thanks to the use of a proper setup of far-UV filters, we are able to put strong constraints on the maximum Y (Y_{max}) values compatible with the data. We find differences Delta Y_{max} ~ 0.02-0.04 between the clusters with M13 showing the largest value (Y_{max} ~ 0.30) and M3 the smallest (Y_{max} ~ 0.27). In g...

  1. Patterns of mouse reticulon 3 mRNA and protein expression in the mouse central nervous system

    LIU Jin; QIANG Boqin; YUAN Jiangang; HUANG Xiaowei; PENG Xiaozhong; YANG Hongbo; YIN Bin; TAN Xinyu; FAN Ming; FAN Wenhong; LIU Bingyan

    2003-01-01

    Reticulons (RTN) are endoplasmic reticulumassociated protein complexes, which are localized in the endoplasmic reticulum (ER) and identified as markers for neuroendocrine differentiation. At least four different RTN genes have been identified in mammals, but in most cases,the functions of the encoded proteins except mammalian RTN4-A and RTN4-B are still elusive. In the present study,mouse reticulon 3 (mRTN3) is cloned and its expression pattern in a variety of tissues is investigated. Three alternatively spliced transcripts of 1.8, 2.8 and 4.2 kb are revealed by Northern blotting hybridization. The 1.8 and 2.8 kb transcripts are expressed in many tissues. The 2.8 kb transcript has a high level in brain and the 4.2 kb transcript is only found in brain. In situ hybridization and immunohistochemical analysis indicated its high expression in non-glial cells in some particular region of mouse central nervous system, such as hippocampus, sub-thalamus nucleus, thalamus nucleus and cerebrum cortex.

  2. Encapsulating MAl 2O 4:Eu 2+, Dy 3+ (M = Sr, Ca, Ba) phosphors with triethanolamine to enhance water resistance

    Ji, Ping Ting; Chen, Xiang Ying; Wu, Ye Qin

    2011-12-01

    Traditional aluminates phosphors with persistent luminescence are chemically unstable to water or moisture. Thus, how to improve the water-resistance of these phosphors is becoming a key issue in their practical applications. In this work, a series of alkaline earth aluminate phosphors including MAl 2O 4:Eu 2+, Dy 3+ (M = Sr, Ca, Ba) have been prepared by a co-precipitation synthesis and postannealing approach, using 8-hydroxyquinoline and sodium oxalate as precipitants. The samples before and after encapsulation were well characterized by means of XRPD, FESEM, FT-IR, TGA-DTG and PL techniques as well as water resistance measurements. The precipitants involved can react with Al 3+ and Sr 2+ (or Ca 2+, Ba 2+) to form complex compounds in aqueous solution, which further convert into porous phosphors by postannealing method under reducing atmosphere. Next, triethanolamine encapsulation at room temperature was conducted onto their surfaces to improve the water resistance. The results reveal that the encapsulation of aluminate phosphors with triethanolamine can effectively enhance the water resistance, and minimally affect on persistent phosphorescence.

  3. U-3M plasma start-up scenario sustained by gas puffing as a different plasma confinement scenario: first results

    In order to reduce flux of neutrals into the plasma confinement volume, discharge start-up scenario maintained by impulse gas puffing (GP) has been proposed. Absence of constant working gas feeding in this scenario opens a possibility to reduce working gas pressure in the U-3M vacuum vessel. It was shown that the time of entire vessel filling after sharp gas puffing pulse is about 10-20 ms. In discharges with 5-6 kV on the RF generators and proposed start-up scenario, a delay between GP pulse and plasma creation was shorter than the chamber filling time.The same level of the electron density has been achieved in the discharge under consideration and conventional 5-6 kV discharge maintained by the constant gas feeding only. The Halpha emission waveform in the considered discharges is similar to its waveforms in the conventional devices where the sizes of vacuum chamber and plasma are close each other.

  4. Steady state hemodynamic and energetic characterization of the Penn State/3M Health Care Total Artificial Heart.

    Weiss, W J; Rosenberg, G; Snyder, A J; Pierce, W S; Pae, W E; Kuroda, H; Rawhouser, M A; Felder, G; Reibson, J D; Cleary, T J; Ford, S K; Marlotte, J A; Nazarian, R A; Hicks, D L

    1999-01-01

    Total Artificial Heart (TAH) development at Penn State University and 3M Health Care has progressed from design improvements and manufacturing documentation to in vitro and in vivo testing to characterize the system's hemodynamic response and energetic performance. The TAH system is completely implantable and intended for use as an alternative to transplantation. It includes a dual pusher plate pump and rollerscrew actuator, welded electronics and battery assembly, transcutaneous energy transmission system, telemetry, and a compliance chamber. In vitro testing was conducted on a Penn State mock circulatory loop with glycerol/water solution at body temperature. Tests were performed to characterize the preload and afterload response, left atrial pressure control, and power consumption. A sensitive preload response was demonstrated with left atrial pressure safely maintained at less than 15 mm Hg for flow rates up to 7.5 L/min. Variations in aortic pressure and pulmonary vascular resistance were found to have minimal effects on the preload sensitivity and left atrial pressure control. In vivo testing of the completely implanted system in its final configuration was carried out in two acute studies using implanted temperature sensors mounted on the electronics, motor, and energy transmission coil in contact with adjacent tissue. The mean temperature at the device-tissue interface was less than 4 degrees C above core temperature. PMID:10360721

  5. NOAA ESRI Grid- 3m Bathymetric Slope of St. Croix (Buck Island), US Virgin Islands, Project NF-06-03, 2006, UTM 20 NAD83

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset contains an ESRI Grid representing the slope (in degrees) of the bathymetry of the north shore of St. Croix, US Virgin Islands, based on a 3 m...

  6. FoxP3 mRNA splice forms in synovial CD4+ T cells in rheumatoid arthritis and psoriatic arthritis

    Ryder, L. Rebekka; Bartels, Else Marie; Woetmann, Anders; Madsen, Hans Ole; Ødum, Niels; Bliddal, Henning; Danneskiold-Samsøe, Bente; Ribel-Madsen, Søren; Ryder, Lars P.

    2012-01-01

    Our aim was to elucidate the relative amount of the different splice forms of FoxP3 mRNA in CD4+ T cells in peripheral blood (PB) compared to synovial fluid (SF) in RA and PsA patients. FoxP3 mRNA was measured using a quantitative real-time PCR method. CD4+ T cells were isolated from 17 paired sa...

  7. Detailed DFT studies of the electronic structure and optical properties of KBaMSe3 (M = As, Sb)

    Highlights: • The compounds are studied by FP-LAPW method within LDA, GGA, EV-GGA approximations. • All the compounds show indirect band gap nature. • Bonding nature is mixed covalent and ionic. • High absorption peaks and reflectivity ensures there utility in optoelectronic devices. - Abstract: Bonding nature as well as the electronic band structure, electronic charge density and optical properties of KBaMSe3 (M = As, Sb) compounds have been calculated using a full-potential augmented plane wave (FP-LAPW) method within the density functional theory. The exchange–correlation potential was handled with LDA and PBE-GGA approximations. Moreover, the Engel–Vosko generalized gradient approximation (EV-GGA) and the modified Beck–Johnson potential (mBJ) were also applied to improve the electronic band structure calculations. The study of band structure shows that KBaAsSe3/KBaSbSe3 compounds have an indirect band gap of 2.08/2.10 eV which are in close agreement with the experimental data. The bonding nature has been studied as well using the electronic charge density (ECD) contour in the (1 0 1) crystallographic plane. It has been revealed that As/Sb–O atoms forms a strong covalent, while Ba–Se atoms form weak covalent bonding and the ionic bonding is mainly found between K and Ba atoms. Moreover, the complex dielectric function, absorption coefficient, refractive index, energy-loss spectrum and reflectivity have been estimated. From the reflectivity spectra, we found that KBaAsSe3 compound shows greater reflectivity than KBaSbSe3, which means that KBaAsSe3 compound can be used as shielding material in visible and also in ultra violet region

  8. An experimental study of temperatures in cloud from release of flashing liquid CO2 in 3m long channel

    Amrit Adhikari, André V. Gaathaug, Dag Bjerketvedt, Knut Vaagsaether

    2014-01-01

    Full Text Available Flashing of the liquid CO2 is an accidental hazards that may occurs in many industrial sector such as, process industries, carbon capture and storage projects, crude oil extraction process etc. Sometimes the accidental release of liquid CO2 that causes the health hazards which may costs loss of lives and properties. In order to alleviate the aforementioned probable hazards, the experiment will be highly beneficial. This research activity is conducted through the temperature measurement in the cloud of flashing liquid CO2 confirming the formation of dry ice and measuring frontal velocity of the cloud as well as its height formed from the vapour CO2 dispersion. The liquid CO2 was released in the 3m long channel from the cylinder through two nozzles of diameter 0.5mm and 1.0mm. This leads the formation of dry ice measuring -73oC and -71oC from the nozzle sized 0.5mm and 1.0mm respectively. 0.5mm nozzle and 1.0mm nozzle having mass flow rate of liquid CO2 as 0.0089 kg/s and 0.029 kg/s, overall frontal velocity of 0.52 m/s and 1.51 m/s thus formed cloud height measuring 0.05m and 0.1m respectively. Frontal velocity of the cloud was found to be highest at distance of 0.5m from nozzle with 1.49 m/s and 5.5 m/s for both nozzles 0.5mm and 1.0mm diameter respectively. Upon the increasing distance from the nozzle, the temperature of the formed cloud was seen to be in increasing order.

  9. Design report for an indirectly cooled 3-m diameter superconducting solenoid for the Fermilab Collider Detector Facility

    The Fermilab Collider Detector Facility (CDF) is a large detector system designed to study anti pp collisions at very high center of mass energies. The central detector for the CDF shown employs a large axial magnetic field volume instrumented with a central tracking chamber composed of multiple layers of cylindrical drift chambers and a pair of intermediate tracking chambers. The purpose of this system is to determine the trajectories, sign of electric charge, and momenta of charged particles produced with polar angles between 10 and 170 degrees. The magnetic field volume required for tracking is approximately 3.5 m long an 3 m in diameter. To provide the desired δp/sub T/p/sub T/ less than or equal to 1.5% at 50 GeV/c using drift chambers with approx. 200μ resolution the field inside this volume should be 1.5 T. The field should be as uniform as is practical to simplify both track finding and the reconstruction of particle trajectories with the drift chambers. Such a field can be produced by a cylindrical current sheet solenoid with a uniform current density of 1.2 x 106 A/m (1200 A/mm) surrounded by an iron return yoke. For practical coils and return yokes, both central electromagnetic and central hadronic calorimetry must be located outside the coil of the magnet. This geometry requires that the coil and the cryostat be thin both in physical thickness and in radiation and absorption lengths. This dual requirement of high linear current density and minimal coil thickness can only be satisfied using superconducting technology. In this report we describe the design for an indirectly cooled superconducting solenoid to meet the requirements of the Fermilab CDF. The components of the magnet system are discussed in the following chapters, with a summary of parameters listed in Appendix A

  10. Characterization and thermal behavior of PrMO3 (M = Co or Ni) ceramic materials obtained from gelatin

    Graphical abstract: The micrograph in figure shows sample calcined at temperature 900 °C. The sample exhibits morphology with considerable porosity and the formation of agglomerated nanometric particles. Gelatin provides the system with a large amount of organic matter, which is then removed during calcinations, favoring the appearance of pores in the material. Highlights: ► Oxides with PrNiO3 and PrCoO3 were prepared by new method synthesis. ► The gelatin, through its carboxylate groups and amine, is an efficient director. ► The obtained materials have magnetic properties and application in catalysis. ► The decomposition kinetic study of bonding groups of gelatin with metallic ions that takes part in the synthesis of PrMO3. -- Abstract: Metal oxides with perovskite-type structure have attracted considerable interest in recent years due to their magnetic and electrical properties, as well as their catalytic activity. In this study, oxides with PrNiO3 and PrCoO3 composition were prepared by using gelatin powder as a precursor agent for its use as a catalyst. The powders obtained were calcined at 700 °C and 900 °C and characterized using the X-ray diffraction, thermal analysis (thermogravimetry and differential thermal analysis), infrared spectroscopy, temperature programed reduction and scanning electron microscopy techniques. Thermogravimetric data using the non-isothermal kinetic models of Flynn and Wall and “Model-free Kinetics” were used to determine the activation energy to study the decomposition kinetics of the ligand groups with system's metallic ions that takes part in the synthesis of PrMO3 (M = Ni or Co).

  11. Site-preferential design of itinerant ferromagnetic borides: experimental and theoretical investigation of MRh6B3 (M = Fe, Co).

    Misse, Patrick R N; Gillessen, Michael; Fokwa, Boniface P T

    2011-10-17

    Single-phase polycrystalline samples of the compounds MRh(6)B(3) (M = Fe, Co) as well as single crystals of CoRh(6)B(3) have been synthesized by arc-melting the elements under a purified argon atmosphere in a water-cooled copper crucible. The characterization of the new phases was achieved by using single-crystal and powder X-ray diffraction as well as EDX measurements. The two phases are isotypic and crystallize in the hexagonal Th(7)Fe(3) structure type (space group P6(3)mc, no. 186, Z = 2). In this structure, the magnetically active atoms (Fe, Co) are preferentially found on only one of the three available rhodium sites, and together with rhodium they build a three-dimensional network of interconnected (Rh/M)(3) triangles. Magnetic properties investigations show that both phases order ferromagnetically below Curie temperatures of 240 K (for FeRh(6)B(3)) and 150 K (for CoRh(6)B(3)). First-principles DFT calculations correctly reproduce not only the lattice parameters but also the ground state magnetic ordering in the two phases. These calculations also show that the long-range magnetic ordering in both phases occurs via indirect ferromagnetic coupling between the iron atoms mediated by rhodium. This magnetic structural model also predicts the saturation magnetizations to be 4.02 μ(B) for FeRh(6)B(3) (3.60 μ(B) found experimentally) and 2.75 μ(B) for CoRh(6)B(3). Furthermore, both phases are predicted to be metallic conductors as expected for these intermetallic borides. PMID:21905755

  12. Deuterium kinetic isotope effect for oxidation of perdeuterated sodium butyrate with manganate in 3 M sodium hydrochloride solution

    Deuterium kinetic effect, D-KIE, for oxidation of perdeuterided sodium butyrate, CD3(CD2)2COONa, with manganate in the aqueous solution of 3M NaOH has been determined in the temperature range 323-373 K. The temperature dependent kH/kD ratios are in the range from 17.59 at 323 K to 11,25 at 373 K. The activation energy difference, δQ0 = Q0DD - Q0=HH δH0DD - δH0HH = 9.20 kJ mol-1, and the Arrhenius preexponential factors ratio A0DD/A0HH is equal to 1.76, corresponding to δS0DD - δS0HH = 4.70 k J-1 as deduced from the Arrhenius and Eyring diagrams. This is the main evidence of tunnelling in the transfer of methylene hydrogens of butyrate to the negatively charged oxygens of manganate in very basic solutions. The k0HH/k0DD ratios, corrected for the ionic strength, have been reproduced by multiplying the (k0HH/k0DD)KIE value, caused by zero point energy differences, by the Bell tunnel correction QtHH.QtDD. The half width of the energy barrier, as approximated by an inverted parabola, was found to be equal to 5x10-11 m. The physico-chemical origin of the energy barrier for the oxidation of n-chain aliphatic carboxylates with MnO42- ions in strongly alkaline solutions has been discussed. The mechanisms of the permanganate versus manganate oxidation i. e., in acidic versus alkaline media are compared. (author)

  13. Synthesis of LaMO{sub 3} (M = Fe, Co, Ni) using nitrate or nitrite molten salts

    Yang Jun, E-mail: tyangj@jnu.edu.c [Department of Chemistry, Jinan University, Shipai, Guangzhou, Guangdong Province 510632 (China); Li Runsheng; Zhou Junyi; Li Xiaoci; Zhang Yuanming; Long Yulin [Department of Chemistry, Jinan University, Shipai, Guangzhou, Guangdong Province 510632 (China); Li Yongwang [State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001 (China)

    2010-10-22

    Research highlights: {yields} The molten salt, synthesis temperature, the oxidising properties, the basicity and oxidation states of the melt play an important role in LaMO{sub 3} synthesis. {yields} The system needs a careful optimisation of these parameters to obtain pure orthorhombic LaFeO{sub 3}, hexagonal LaCoO{sub 3} and LaNiO{sub 3}. Purely hexagonal LaNiO{sub 3} nanocrystals were successfully synthesized. {yields} SEM analyses were taken to investigate how the different parameters affect the microstructure of the samples. {yields} The specific surface area and crystallite size of LaMO{sub 3} show much difference in different system. - Abstract: Perovskite compound LaMO{sub 3} (M = Fe, Co, Ni) nanocrystals were successfully synthesized in molten nitrates or nitrites from a mixture of lanthanum nitrate and an M-containing nitrate for 2 h. The effect of the various process parameters on the phase purity, crystallite size, specific surface area and morphology of the synthesized nanocrystals were systematically studied by XRD, scanning electron microscopy (SEM), simultaneous TG/DSC and BET measurements. The results showed that salt medium, annealing temperatures (mainly 450-850 {sup o}C), oxidising properties and basicity of the melt played an important role in the synthesis of LaMO{sub 3}. The addition of Na{sub 2}O{sub 2} facilitated the reaction between La{sub 2}O{sub 3} and NiO or Co{sub 3}O{sub 4}, leading to the formation of LaNiO{sub 3} and LaCoO{sub 3} at a much lower temperature of 450 {sup o}C. Pure hexagonal LaNiO{sub 3} nanocrystals were obtained in molten NaNO{sub 3}-KNO{sub 3} eutectic with Na{sub 2}O{sub 2} at 550-750 {sup o}C.

  14. Activity identification of chimeric anti-caspase-3 mRNA hammerhead ribozyme in vitro and in vivo

    XU; Renhuan; (

    2001-01-01

    [1]Andrew, F., Gerard, E., A license to kill, Cell, 1996, 85: 781-784.[2]Thornberry, N. A., Lazebnik, Y., Caspases: Enemies within, Science, 1998, 281: 1312-1316.[3]Kijima, H., Ishida, H., Ohkawa, T. et al., Therapeutic application of ribozymes, Pharmacol. Ther., 1995, 68: 247-264.[4]Phylactou, L. A., Kilpatrick, M. W., Wood, M. J., Ribozymes as therapeutic tools for genetic disease, Hum. Mol. Genet., 1998, 7(10): 1649-1653.[5]Bettrand, E., Pictet, R ., Grange, T., Can heamerhead ribozymes be efficient tools inactivate gene function? Nucleic Acids Res., 1994, 22: 293-300.[6]Lieber, A., Strauss, M., Selection of efficient cleavage sites in target RNAs by using a ribozyme expression library, Mol. Cell Biol., 1995, 15: 540-551.[7]Xu, R. H., Zhou, X. Q., Xie, Q. et al., Preparation and identification of hammerhead ribozyme in vitro against rat caspase-3 mRNA fragment, Chin. J. Hepatol., 2000,8: 361-363.[8]Liu, J., Jin, Y. X., Wang, D. B., A novel vector for abundant expression of antisense RNA, triplex-forming RNA and ribozyme in vivo, High Technology Letters, 2000, 6: 84-88.[9]Sambrook, J., Fritsch, E. F., Maniatis, T., Molecular Cloning: A Laboratory Manual, 2nd ed., New York: Cold Spring Harbor Laboratory Press, 1989.[10]Porter, A. G., J?nicke, R. U., Emerging roles of caspase-3 in apoptosis, Cell Death Differ, 1999, 6: 99-104.[11]Cryns, V., Yuan, J., Proteases to die for, Genes Dev., 1998, 12: 1551-1570.[12]Narendra, K. V., Anikumar, R. K., Fritz, E., Recent developments in the hammerhead ribozyme field, Nucleic Acids Research, 1998, 26: 5237-5242.

  15. CAST3M/ARCTURUS: A coupled heat transfer CFD code for thermal-hydraulic analyzes of gas cooled reactors

    The safety of gas cooled reactors (High Temperature Reactors (HTR), Very High Temperature Reactors (VHTR) or Gas Cooled Fast Reactors (GFR)) must be ensured by systems (active or passive) which maintain loads on component (fuel) and structures (vessel, containment) within acceptable limits under accidental conditions. To achieve this objective, thermal-hydraulics computer codes are necessary tools to design, enhance the performance and ensure a high safety level of the different reactors. Some key safety questions are related to the evaluation of decay heat removal and containment pressure and thermal loads. This requires accurate simulations of conduction, convection, thermal radiation transfers and energy storage. Coupling with neutronics is also an important modeling aspect for the determination of representative parameters such as neutronics coefficient (Doppler coefficient, Moderator coefficient, ...), critical position of control rods, reactivity insertion aspects, .... For GFR, the high power density of the core and its necessary reduced dimension cannot rely only on passive systems for decay heat removal. Therefore, forced convection using active safety systems (gas blowers, heat exchangers, ...) are highly recommended. Nevertheless, in case of station black-out, the safety demonstration of the concept should be guaranteed by natural circulation heat removal. This could be performed by keeping a relatively high back-up pressure for pure helium convection and also by heavy gas injection. So, it is also necessary to model mixing of different gases, the on-set of natural convection and the pressure and thermal loads onto the proximate or guard containment. In this paper, we report on the developments of the CAST3M/ARCTURUS thermal-hydraulics (Lumped Parameter and CFD) code developed at CEA, including its coupling to the neutronics code CRONOS2 and the system code CATHARE. Elementary validation cases are detailed, as well as application of the code to benchmark

  16. Detailed DFT studies of the electronic structure and optical properties of KBaMSe{sub 3} (M = As, Sb)

    Azam, Sikander; Khan, Saleem Ayaz; Khan, Wilayat [New Technologies – Research Center, University of West Bohemia, Univerzitni 8, 306 14 Pilsen (Czech Republic); Muhammad, Saleh; Udin, Haleem [Materials Modeling Lab, Department of Physics, Hazara University, Mansehra (Pakistan); Murtaza, G., E-mail: murtaza@icp.edu.pk [Materials Modeling Laboratory, Department of Physics, Islamia College University, Peshawar (Pakistan); Khenata, R., E-mail: khenata_rabah@yahoo.fr [Laboratoire de Physique Quantique et de Modélisation Mathématique (LPQ3M), Département de Technologie, Université de Mascara, Mascara 29000 (Algeria); Shah, Fahad Ali [Materials Modeling Lab, Department of Physics, Hazara University, Mansehra (Pakistan); Minar, Jan [New Technologies – Research Center, University of West Bohemia, Univerzitni 8, 306 14 Pilsen (Czech Republic); Ahmed, W.K. [ERU, College of Engineering, United Arab Emirates University, Al Ain (United Arab Emirates)

    2015-09-25

    Highlights: • The compounds are studied by FP-LAPW method within LDA, GGA, EV-GGA approximations. • All the compounds show indirect band gap nature. • Bonding nature is mixed covalent and ionic. • High absorption peaks and reflectivity ensures there utility in optoelectronic devices. - Abstract: Bonding nature as well as the electronic band structure, electronic charge density and optical properties of KBaMSe{sub 3} (M = As, Sb) compounds have been calculated using a full-potential augmented plane wave (FP-LAPW) method within the density functional theory. The exchange–correlation potential was handled with LDA and PBE-GGA approximations. Moreover, the Engel–Vosko generalized gradient approximation (EV-GGA) and the modified Beck–Johnson potential (mBJ) were also applied to improve the electronic band structure calculations. The study of band structure shows that KBaAsSe{sub 3}/KBaSbSe{sub 3} compounds have an indirect band gap of 2.08/2.10 eV which are in close agreement with the experimental data. The bonding nature has been studied as well using the electronic charge density (ECD) contour in the (1 0 1) crystallographic plane. It has been revealed that As/Sb–O atoms forms a strong covalent, while Ba–Se atoms form weak covalent bonding and the ionic bonding is mainly found between K and Ba atoms. Moreover, the complex dielectric function, absorption coefficient, refractive index, energy-loss spectrum and reflectivity have been estimated. From the reflectivity spectra, we found that KBaAsSe{sub 3} compound shows greater reflectivity than KBaSbSe{sub 3}, which means that KBaAsSe{sub 3} compound can be used as shielding material in visible and also in ultra violet region.

  17. Spacewatch Astrometry of Asteroids and Comets with the Bok 2.3-m and Mayall 4-m Telescopes.

    Scotti, James V.; McMillan, Robert S.; Larsen, Jeffrey A.

    2014-11-01

    We use the Bok 2.3-m and Mayall 4-m telescopes on Kitt Peak to improve knowledge of the orbits and magnitudes of high priority classes of Near Earth Objects (NEOs) and other small bodies in need of recovery that cannot be reached with the Spacewatch 0.9-m and 1.8-m telescopes. Targets include NEOs with potential close encounters with Earth (Virtual Impactors; VIs), future targets of radar, NEOs previously detected by NEOWISE with orbits or albedos suggesting potential for cometary activity, potential destinations for spacecraft, returning NEOs with hard-won albedos and diameters determined by NEOWISE, and faint Potentially Hazardous Asteroids (PHAs). Notable targets successfully recovered include the Earth Trojan 2010 TK7 and the faint almost-lost VI 2011 BY24 discovered by NEOWISE. Between 2010 June 6 and 2014 July 23 the MPC accepted 1316 lines of astrometry by us with these telescopes on 207 different NEOs including 84 PHAs. We made 343 observations of PHAs with V>=22. Our average arc extension on large PHAs (with Hprivate communication). Support of Spacewatch was/is from JPL subcontract 100319 (2010-2011), NASA/NEOO grants NNG06GJ42G, NNX11AB52G, NNX12AG11G, NNX13AP99G, NNX14AL13G, and NNX14AL14G, the Lunar and Planetary Laboratory, the Brinson Foundation of Chicago, IL, the estates of R. S. Vail and R. L. Waland, and other private donors. We are also indebted to the MPC for their web services and to NOAO/KPNO and Steward Observatory for telescope time.

  18. Somos un envase : Discursos sobre el aborto

    Löcher, Jennifer Irene

    2014-01-01

    No hay persona que no tenga opinión acerca del asunto y, cada vez más, la sociedad argentina debate sobre la pregunta de si se debe legalizar/despenalizar el aborto o no. Nunca antes se habló tanto sobre el tema públicamente: se publican artículos en los diarios, hay manifestaciones a favor y hay manifestaciones en contra de la legalización del aborto. El siguiente trabajo pretende relevar y analizar discursos que circulan socialmente alrededor del debate sobre el aborto. (Párrafo extraíd...

  19. Concepciones sobre la docencia universitaria de calidad

    Arbeláez López, Ruby; Fortes del Valle, M. Carmen; Grau Rubio, Claudia

    2008-01-01

    Con esta investigación hemos querido participar en el proceso de búsqueda y construcción del sentido de calidad aplicado a la docencia universitaria, con el objetivo general de evidenciar las concepciones sobre docencia de calidad que pueden deducirse de los procesos de evaluación de los profesores universitarios. Nuestra meta final intenta propiciar la revisión de las políticas educativas y el enriquecimiento de la cultura sobre docencia y sobre evaluación docente. La mayor aportación de nue...

  20. Ensaio sobre Saramago = Essay on Saramago

    Weigert, Sergio

    2013-01-01

    Partindo da obra de José Saramago, Ensaio sobre a Cegueira, constrói-se o “Ensaio sobre Saramago” sob perspectiva filosófica, fundamentada particularmente em Fredric Jameson. A interrupção da quotidianidade, matéria do desenvolvimento do conteúdo, faz aflorar a hipótese da temporalidade congelada, suporte da argumentação do teórico. Levanta-se a discussão sobre Modernidade e Pós-Modernidade da obra de Saramago, avançando no recurso da ironia, não como alicerce, mas como teia que tece, envolve...

  1. Puente sobre el Oosterschelde, Holanda

    Hoving, H. T.

    1967-03-01

    Full Text Available This new bridge, forming part of the Delta project, is made of concrete, and was built by successive overhangs. Precast units were mainly used. The bridge is 5,000 m long, and is 11.85 m wide. The main spans are 95 m in length, except one, which can be opened up to sea traffic, which is 40 m long. The free height of the bridge over the sea is 15 m, which is insufficient for large ships. This required that one of the spans, in deep water, should open up, on hinges, and provide free passage to large ships. The intermediate bridge supports are of special interest. They rest on piles which go down to 38 m. They are hollow, cylindrical, of 4.35 m external diameter, and are driven into the ground in several stages, as they penetrate through the sands at the bottom of the Oosterschelde. To drive them in, an excavating device, inside the pile, was utilised, and also a dredging and suction mechanism, to clean out the bottom, and allow the piles to sink by gravity. But when external friction did not allow this to happen, the piles were weighed down with up to 500 tons of ballast. A series of three of these piles, in a row, makes up each bridge support. A cross member over the pile heads supports, in turn, the bridge deck. The bridge was built in successive sections, overhanging from each support, and then finally connected with a central portion. Use of precast units has been very extensive, so that the bridge can be justiaflably regarded as being prefabricated.Este nuevo puente, que forma parte del Plan de obras denominadas del Delta, es de hormigón y se ha construido por el procedimiento de voladizos sucesivos, utilizando, en su mayor parte, elementos prefabricados. Tiene una longitud total de 5.000 m; una anchura de 11,85 m; tramos principales de 95 m de luz, salvo uno, levadizo, que tiene 40 m. La altura libre sobre las ag^uas del mar es de 15 m, que es insuficiente para las naves de gran tonelaje; esto exigió que uno de sus tramos, en aguas

  2. Puente sobre el rio Medway

    Freeman, Fox, Ingenieros

    1963-02-01

    have been prestressed both longitudinally and transversally. Between the two circulation roadways an elastic barrier has been placed, supported on metal posts.El puente sobre el río Medway tiene la misión de salvar dicho río en el nuevo trazado de carretera necesario para aliviar el denso tráfico estival entre Dower y Londres. Está situado en las proximidades de la ciudad de Rochester. La estructura se ha construido utilizando las vías de concurso. De todos los tipos presentados se eligió una estructura de hormigón armado. La longitud total de la obra es de 1.000 m. Los tres tramos principales de la obra salvan el río. El central es de 152 m de luz, y los dos adyacentes son de 103 m cada uno. Los accesos tienen un total de 18 tramos, que arrojan una longitud de 654 m. La anchura del puente es de 34 m, y la calzada se ha subdividido en dos direcciones de tráfico de 7,30 m cada una y, además, se han dejado dos espaldones laterales de 2,40 m de anchura. En planta se puede admitir que el puente tiene una alineación recta con una ligerísima curva, y que en el plano vertical presenta una pendiente de desagüe entre las pilas 9 y 10. Los estribos son de hormigón armado: tipo celular el del este y de hormigón en masa el del oeste. Los estribos se apoyan sobre pilotes hexagonales de hormigón armado cuya circunferencia circunscrita tiene 55 cm de radio y de 12 a 20 m de longitud. Cuando el firme se hallaba a profundidades inferiores a 6 m, los estribos se cimentaban directamente sobre el firme. Las pilas constituyen pórtico y tienen una altura variable de 9 a 30 m sobre el nivel del suelo. Los tramos de acceso forman una estructura continua simplemente apoyada. Cada tramo se compone de ocho vigas longitudinales de 30 a 41 m de longitud y de 190 toneladas cada una. Estas vigas son del tipo pretensado y prefabricado. El tramo central es del tipo cantilever, constituido por dos brazos, de 30 m de longitud, formados por vigas cajón. Cada una de estas vigas consta

  3. PERSPECTIVAS INFANTILES SOBRE LA TERRITORIALIDAD

    Noelia Enriz

    2009-12-01

    Full Text Available En este trabajo nos proponemos un acercamiento a las diversas ideas infantiles sobre el territorio habitado, en el contexto particular de la población mbyá guaraní de Misiones. La fragilidad territorialidad a la que es expuesta la población indígena en Argentina se manifiestan cotidianamente en diversas áreas. La población mbyá, ha sido surcada por los límites de los estados nacionales de Paraguay, Brasil y Argentina. La sedentarización y los cercamientos de tierras en los diferentes estados, han impulsado transformaciones de las lógicas de subsistencia, de habitación y organización comunitaria. En el caso de la provincia de Misiones la acreditación burocrática de los títulos de tierras se encuentra aplazada, el estado no se compromete con la concreción de este derecho.

  4. Estudo multicasos sobre atividades inovativas

    Sonia Regina Hierro Parolin

    2013-09-01

    Full Text Available Em estudos sobre competitividade argumenta-se que as empresas necessitam de estratégias baseadas em inovações e de capacidades internas em constantes e intensas transformações, não somente nos padrões tecnológicos, mas também no encadeamento do processo de gestão das atividades inovativas, como processos dinâmicos, não lineares e diversificados, em função de múltiplos fatores dos ambientes interno e externo. Para contribuir com essas discussões, neste artigo apresenta-se um estudo multicasos em quatro indústrias de médio e grande portes, de segmentos, densidades tecnológicas e históricos com inovações diferentes entre si. Como principais resultados, salientam-se o encadeamento das atividades inovativas como parte de uma estratégia organizacional para obter resultados com inovação e a afluência de todas as pessoas, e não somente as alocadas em pesquisa e desenvolvimento, para o cumprimento dessa estratégia.

  5. Sobre a psicopatologia dos atos

    Roberto Calazans

    2015-07-01

    Full Text Available Este artigo pretende apresentar a psicopatologia dos atos a partir do esquema de Jacques Lacan sobre a angústia. Diferenciamos os acting-out, a passagem ao ato, os sintomas, as inibições e a angústia fazendo uma duplicação do esquema de Lacan levando em consideração os registros do simbólico, do real e do imaginário. Esse esquema permite uma abordagem da questão dos atos do sujeito sem cair em uma perplexidade do clínico, nem na confusão entre os atos e a ação. Permite também uma melhor orientação do clínico em relação às diversas modalidades de respostas subjetivas que não se restringem à questão sintomática, que é o campo inaugural da clínica psicanalítica desde a sua fundação por Sigmund Freud. Acreditamos contribuir, assim, para um maior esclarecimento desse esquema no ensino de Lacan e para que ele possa servir de orientação para o tratamento dos atos do sujeito na clínica.

  6. El Impuesto sobre Sociedades - Tema 5

    Andrés Aucejo, Eva

    2008-01-01

    El Impuesto sobre Sociedades: Hecho imponible. Sujeto pasivo. Imputación temporal de ingresos y gastos. Régimen de transparencia fiscal. La base imponible: Ingresos computables, partidas deducibles y no deducibles. Reinversión de beneficios extraordinarios.

  7. Los derechos de autor sobre obtenciones vegetales

    Rosario Silva Gilli

    2015-01-01

    Full Text Available Contenido: Las creaciones en la agricultura. Los derechos de autor sobre obtenciones vegetales. El Convenio Internacional para la protección de las obtenciones vegetales (París 1961 y sus revisiones de Ginebra 1972, 1978,1991 Objeto de la protección legal. Condiciones del cultivar. Alcance de la protección. La protección de obtenciones vegetales en el Mercosur. Los Derechos de autor en el Mercosur. El Protocolo de Armonización de normas sobre Propiedad Intelectual en el Mercosur. El Acuerdo de Cooperación y facilitación sobre la protección de las obtenciones vegetales en los Estados Partes del Mercosur.  Alcance de la normativa Mercosur. Los Derechos sobre cultivares en Uruguay. Los Derechos de autor como derechos humanos. ¿Derechos de autor vs. derecho de propiedad intelectual? Reflexión final

  8. CAST3M/ARCTURUS: a coupled heat transfer / CFD code for thermal-hydraulic analyses of gas cooled reactors

    , heat exchangers...) are highly recommended. Nevertheless, in case of a total loss of station service power, the safety demonstration of the concept should be guaranteed by natural circulation decay heat removal. This could be performed by keeping a relatively high back-up pressure for pure He natural convection and also by heavy gas injection. So, it also necessary to compute the mixing of different gases and the on-set of natural convection. In this paper, we will report on the developments of the CAST3M/ARCTURUS thermal-hydraulics code developed at CEA, including its coupling to the neutronics code CRONOS2 and the system code CATHARE. Elementary validation cases will be detailed, as well as application of the code to benchmark problems such as the GT-MHR or the HTTR. Examples of thermal-hydraulic calculations decay heat removal of fast reactors designs (GCFR) will also be described. (authors)

  9. Overview of the O3M-SAF validation facility for operational GOME-2 NO2 column data

    Pinardi, Gaia; Lambert, Jean-Christopher; Granville, Jos; van Roozendael, Michel; Delcloo, Andy; Debacker, Hugo; Valks, Pieter; Hao, Nan

    In the framework of EUMETSAT's Satellite Application Facility on Ozone and Atmospheric Chemistry Monitoring (O3M-SAF,) nitrogen dioxide (NO2) total column and tropospheric column data are generated operationally from GOME-2 measurements in near-real-time (within 2:30 hours after sensing). NO2 column data are retrieved from the Earth radiance and solar irradiance spectra by a chain of several modules (currently, the level-0-to-1 processor v4.0 and the level-1-to-2 DOAS retrieval processor GDP v4.3). These intermediate modules calculates the parameters needed to derive the final column data: the slant column density along the optical path, the fractional cover and top pressure of clouds affecting the measurement scene, the geometrical enhancement factor (AMF, needed to convert slant into vertical columns), and the NO2 stratospheric reference to be subtracted from the total column to obtain the tropospheric column. In order to validate the final product (the total and tropospheric NO2 columns) in the best way, and due to the complexity of the GOME-2 retrieval chain and the existing issues related to the set-up of a validation strategy in an operational environment, an end-to-end validation ap-proach has been developed, as recommended by Reference Protocols and Guidelines. To ensure meaningful and continuous quality assessment of GOME-2 NO2 data products, the end-to-end validation approach performs the verification and validation of critical individual components of the level-1-to-2 retrieval chain. Particular interest is given to recurring validation issues, such as the particular way remote sensing samples and smoothes the significant variability of atmospheric NO2, the diurnal cycle of NO2, the poor availability of correlative measure-ments (especially for tropospheric column), as well as the current lack of homogenisation of the validation methods. The end-to-end validation process of GOME-2 NO2 data is based on a set of correlative obser-vations performed by

  10. Hyperfine interactions studies in perovskite oxides of the type LaMO3 (M = Fe, Cr, Mn and Co)

    ABO3-type perovskite oxides have ideal cubic structure and usually show distortions to the orthorhombic or rombohedric symmetry. The A and B siteshave 12-fold and 6-fold oxygen coordination, respectively. Distortions of thecubic structure give rise to new electric, structural and magnetic propertieswhich have great technological and scientific interests. Magnetic dipole and electric quadrupole hyperfine interaction measurements were obtained using111In -> 111 Cd , 181 Hf -> 181 Ta e 140 La -> 140Ceradioactive nuclei substituting for the A or B sites via Perturbed Angulargamma-gamma Correlation technique(1-4). LaMO3 (M = Fe, Cr, Mn and Co)samples were prepared through the chemical route known as Sol-Gel techniqueand analyzed with x-ray diffraction. Both 111In and 181 Hf nuclei wereintroduced in to the sample during the chemical procedure and the 140 Lawas obtained by irradiating with neutrons in the IPEN reactor the natural Lapresent in the samples. One of the aims of this work was the analysis of theElectric Field Gradient (EFG) in the A and B sites as function oftemperature, crystal structure or the electronic characteristic of thetransition metal in the B site. The temperature range of the measurements wasabout from 4 K to 1400 K. The experimental EFG showed to be dependent of thesite occupation and the nuclear probe used in the measurements. Spintransition phenomena were also observed in LaCoO3 samples, which confirmed amodel used to interpret the spin properties in such compound.Crystallographic phase transition effects on the hyperfine parameters inperovskites where M = Fe, Cr and K4n were also analyzed. An additional aim ofthis work was to carry out measurements in the antiferromagnetic region ofthe systems with M = Fe, Cr and Mn using the three radioactive nuclei. Theresults for the magnetic interaction measurements showed a strong influenceof the substitutional sites in the supertransferred magnetic hyperfine fieldfor all the three probe nuclei. The

  11. PERSPECTIVAS INFANTILES SOBRE LA TERRITORIALIDAD

    NOELIA ENRIZ

    2009-12-01

    Full Text Available In this paper we propose a different approach to children's ideas about the geographical area in the particular context of the Mbyá Guarani population, from Misiones (Argentine. The territorial fragility, that is exposed to the indigenous people in Argentina aremanifested daily in several areas. Mbyá population, has been crossed by the boundaries of national states of Paraguay, Brazil and Argentina. The sedentary and enclosures land processes in different states, have prompted changes in the logic of subsistence, housing and community organization. In Misiones province case, bureaucratic accreditation of land titles is postponed, the state is not committed to the realization of this right.RESUMEN: En este trabajo nos proponemos un acercamiento a las diversas ideas infantiles sobre el territorio habitado, en el contexto particular de la población mbyá guaraní de Misiones. La fragilidad territorialidad a la que es expuesta la población indígena en Argentina se manifiestan cotidianamente en diversas áreas. La población mbyá, ha sido surcada por los límites de los estados nacionales de Paraguay, Brasil y Argentina. La sedentarización y los cercamientos de tierras en los diferentes estados, han impulsado transformaciones de las lógicas de subsistencia, de habitación y organización comunitaria. En el caso de la provincia de Misiones la acreditación burocrática de los títulos de tierras se encuentra aplazada, el estado no se compromete con la concreción de este derecho.

  12. Consideraciones preliminares sobre la credibilidad

    Fernando Verdugo

    2004-01-01

    Full Text Available A modo de introducción al Seminario Interno de Profesores de la Facultad de Teología de la PUC, el autor recuerda, en primer lugar, lo que suele entenderse por "credibilidad" y, también, algunos de los criterios generales por los cuales algo o alguien adquiere la calidad de creíble (el que sea razonable, relevante o significativo, capaz de producir gozo estético, etc.. Luego, en la parte más extensa, el autor vuelve a llamar la atención sobre la necesidad de atender a los condicionamientos culturales de la fe cristiana. La fe, al igual que toda experiencia humana, está culturalmente mediada. Tomar conciencia de ese hecho y asumir las consecuencias metodológicas es indispensable para una teología que quiere poner atención a los desafíos actuales y contribuir así a la credibilidad del cristianismoThis article reprints the introductory session to the internal seminar of lecturers from the Faculty of Theology of the UC. In the first place, the author sums up what is usually understood by `credibility' and the general criteria through which something or someone gains credibility (being reasonable, relevant or significant, capable of producing aesthetic pleasure. Then the author deals at length with the need to take notice of the cultural conditionings of the Christian faith. The faith, the same as any other human experience, is culturally mediated. It is crucial for theology to become aware of this fact and come to terms with its methodological consequences, if it wants to face current challenges and so contribute to the credibility of Christianity

  13. Analysis of CD4+CD25+ Regulatory T Cells and Foxp3 mRNA in the Peripheral Blood of Patients with Asthma

    XUE Keying; ZHOU Yongming; XIONG Shengdao; XIONG Weining; TANG Tao

    2007-01-01

    The changes of CD4+CD25+ regulatory T cells (CD4+CD25+ Treg) and Foxp3 mRNA in peripheral blood mononuclear cells (PBMCs) from patients with asthma were investigated in order to elucidate the possible roles of CD4+CD25+ Treg in the development of asthma. The peripheral blood samples were collected from 29 healthy controls (normal control group) and 78 patients with asthma which included 30 patients in exacerbation group, 25 patients in persistent group, and 23 patients in remission group. By using flow cytometry and RT-PCR, the CD4+CD25+ Treg ratio and Foxp3 mRNA in PBMCs were detected. The CD4+CD25+ Treg ratio and Foxp3 mRNA in PBMCs of exacerbation and persistent groups were lower than that of remission and normal control groups (P<0.05). Although the CD4+CD25+ Treg ratio and Foxp3 mRNA of remission group were also lower than that of normal control group, there was no significant difference between them (P>0.05). As compared with persistent group, exacerbation group had lower CD4+CD25+ Treg ratio and Foxp3 mRNA (P<0.05). It was indicated that the decrease of CD4+CD25+Treg ratio and its function in PBMCs may be responsible for pathogenesis of asthma.

  14. Mass spectrometry detection of G3m and IGHG3 alleles and follow-up of differential mother and neonate IgG3.

    Célia Dechavanne

    Full Text Available Mass spectrometry (MS analysis for detection of immunoglobulins (IG of the human IgG3 subclass is described that relies on polymorphic amino acids of the heavy gamma3 chains. IgG3 is the most polymorphic human IgG subclass with thirteen G3m allotypes located on the constant CH2 and CH3 domains of the gamma3 chain, the combination of which leads to six major G3m alleles. Amino acid changes resulting of extensive sequencing previously led to the definition of 19 IGHG3 alleles that have been correlated to the G3m alleles. As a proof of concept, MS proteotypic peptides were defined which encompass discriminatory amino acids for the identification of the G3m and IGHG3 alleles. Plasma samples originating from ten individuals either homozygous or heterozygous for different G3m alleles, and including one mother and her baby (drawn sequentially from birth to 9 months of age, were analyzed. Total IgG3 were purified using affinity chromatography and then digested by a combination of AspN and trypsin proteases, and peptides of interest were detected by mass spectrometry. The sensitivity of the method was assessed by mixing variable amounts of two plasma samples bearing distinct G3m allotypes. A label-free approach using the high-performance liquid chromatography (HPLC retention time of peptides and their MS mass analyzer peak intensity gave semi-quantitative information. Quantification was realized by selected reaction monitoring (SRM using synthetic peptides as internal standards. The possibility offered by this new methodology to detect and quantify neo-synthesized IgG in newborns will improve knowledge on the first acquisition of antibodies in infants and constitutes a promising diagnostic tool for vertically-transmitted diseases.

  15. Ligand exchange and complex formation kinetics studied by NMR exemplified on fac-[(CO)3M(H2O)]+ (M = Mn, Tc, Re)

    Helm, Lothar

    2008-01-01

    In this review ligand exchange and complex formation reactions on fac-[(CO)3M(H2O)3]+ (M = Mn, Tc, Re) and on fac-[(CO)2(NO)Re(H2O)3]2+ are presented. A variety of experimental NMR techniques are described and it is shown that sometimes combinations of techniques applied at variable temperature or variable pressure allowed to measure exchange rate constants and their activation parameters as well as thermodynamic parameters. Furthermore, the use of uncommon nuclei for NMR like 17O or 99Tc ext...

  16. Impacto psicosocial del Downsizing sobre los trabajadores

    CRISTÓBAL JIMÉNEZ JIMÉNEZ

    2006-01-01

    Full Text Available El presente trabajo intenta ahondar en lo expuesto en un trabajo anterior sobre el downsizing como fenómeno psicosociolaboral, analizando su impacto psicosocial. En primer lugar, se exponen los diferentes niveles de comprensión de este fenómeno, para pasar al análisis de los efectos y consecuencias sobre las personas, diferenciando entre dos tipos de víctimas: a los que se van de la organización (despedidos y b los que se quedan en la organización (supervivientes, prestando especial atención a lo que se conoce ya como el "síndrome del superviviente", para lo que se aporta información sobre sus características, las variables moderadoras que intervienen y los modelos explicativos del mismo. Se termina con algunas consideraciones sobre la actualidad y relevancia de dicho síndrome sugiriendo la idea de que el fenómeno del downsizing y sus consecuencias sobre las personas nos enfrenta a lo que podríamos ya considerar como un nuevo síndrome de la Psicopatología Laboral: el síndrome del superviviente.

  17. DISERTACIÓN SOBRE JUSTICIA Y EQUIDAD

    Sayuri P. Tamura M.

    2001-01-01

    Full Text Available «Disertación sobre equidad y justicia» es básicamente una respuesta a una inquietud en particular que yo tenía sobre las distintas posiciones que existen sobre estos dos temas y cómo definir cuál es la más acertada. Hice una descripción del punto de vista de Amartya Sen –la violación de los derechos sobre la propiedad privada es justificable si evitan las hambrunas2– frente al de Robert Nozick –la propiedad privada es un derecho fundamental y como tal debe ser respetado3–, sin embargo, aunque ambos enfoques son totalmente contrarios tienen mucho sentido, por lo cual es bastante difícil decidirse por uno en particular. Fue de esta forma, enfrentando sus opiniones, que yo logré desarrollar una posición frente a estas dos perspectivas, y así dar mi opinión al DISERTACIÓN SOBRE JUSTICIA Y EQUIDAD SAYURI P. TAMURA M. Estudiante de Economía y Negocios Internacionales de la Universidad ICESI. respecto. Al final, llegué a una conclusión, que aunque no es la más original y tampoco es la única, tiene mucho sentido y seguramente de ser posible, la situación del país podría cambiar para bien.

  18. Ensaio sobre Saramago = Essay on Saramago

    Weigert, Sergio

    2013-01-01

    Full Text Available Partindo da obra de José Saramago, Ensaio sobre a Cegueira, constrói-se o “Ensaio sobre Saramago” sob perspectiva filosófica, fundamentada particularmente em Fredric Jameson. A interrupção da quotidianidade, matéria do desenvolvimento do conteúdo, faz aflorar a hipótese da temporalidade congelada, suporte da argumentação do teórico. Levanta-se a discussão sobre Modernidade e Pós-Modernidade da obra de Saramago, avançando no recurso da ironia, não como alicerce, mas como teia que tece, envolvendo tecido e artista.

  19. First-principles investigation of electronic, mechanical and thermodynamic properties of L12 ordered Co3(M, W) (M = Al, Ge, Ga) phases

    Studies were carried out on the equilibrium structural, temperature-dependent mechanical and thermodynamic properties of the Co3(M, W) (M = Al, Ge, Ga) phases in terms of first-principles calculations. The results of the ground-state elastic constants revealed that Co3(M, W) phases are mechanically stable and possess intrinsic ductility. It was found that the elastic heat-resistant properties of Co3(Ge, W) phase are inferior to those of Co3(Al, W) and Co3(Ga, W). Analyzing the charge density difference provides the explanation that the sharp decrease in mechanical properties is mainly due to the weakening of Co–Ge bonding at elevated temperatures for Co3(Ge, W). The elastic anisotropy as a function of temperature is discussed using a universal index. It is observed that Co3(M, W) phases show a high degree of elastic anisotropy. The degree of elastic anisotropy could be significantly decreased by an increase in temperature for Co3(M, W). The lattice vibration is treated with the quasiharmonic phonon approach, considering both the vibrational and thermal electronic contributions. The thermodynamic properties as a function of temperature are computed without any adjustable parameters, including heat capacity, entropy, enthalpy and thermal expansion coefficient

  20. Developmentally Regulated Expression of HDNF/NT-3 mRNA in Rat Spinal Cord Motoneurons and Expression of BDNF mRNA in Embryonic Dorsal Root Ganglion.

    Ernfors, Patrik; Persson, Håkan

    1991-01-01

    Northern blot analysis was used to demonstrate high levels of hippocampus-derived neurotrophic factor/neurotrophin-3 (HDNF/NT-3) mRNA in the embryonic day (E) 13 - 14 and 15 - 16 spinal cord. The level decreased at E18 - 19 and remained the same until postnatal day (P) 1, after which it decreased further to a level below the detection limit in the adult. In situ hybridization revealed that the NT-3 mRNA detected in the developing spinal cord was derived from motoneurons and the decrease seen at E18 - 19 was caused by a reduction in the number of motoneurons expressing NT-3 mRNA. The distribution of NT-3 mRNA-expressing cells in the E15 spinal cord was very similar to the distribution of cells expressing choline acetyltransferase or nerve growth factor receptor (NGFR) mRNA. Moreover, a striking similarity between the developmentally regulated expression of NT-3 and NGFR mRNA was noted in spinal cord motoneurons. A subpopulation of all neurons in the dorsal root ganglia expressed brain-derived neurotrophic factor (BDNF) mRNA from E13, the earliest time examined, to adulthood. These results are consistent with a trophic role of NT-3 for proprioceptive sensory neurons innervating the ventral horn, and imply a local action of BDNF for developing sensory neurons within the dorsal root ganglia. PMID:12106253

  1. Influência do "primer" sobre o esmalte na resistência ao cisalhamento de sistemas adesivos

    RUSSO Eliza Maria Agueda; Garone NETTO Narciso; Rubens Corte Real de CARVALHO; Márcio Garcia dos SANTOS

    1998-01-01

    A proposta deste estudo foi comparar a adesão ao esmalte de dois sistemas adesivos de frasco único com sistemas que usam "primer" e "bond" separadamente, com o objetivo de verificar se a força de adesão da resina composta ao esmalte é influenciada pela presença do "primer" de dentina sobre o esmalte. Foram avaliados quatro sistemas adesivos: ONE STEP (Bisco), PRIME & BOND (Dentsply), SCOTCHBOND MULTI-PURPOSE PLUS (3M) e PROBOND (Dentsply). Molares humanos foram seccionados no sentido ocluso-c...

  2. Impacto psicosocial del Downsizing sobre los trabajadores

    CRISTÓBAL JIMÉNEZ JIMÉNEZ; JOSÉ LUIS SÁNCHEZ LAGUNA

    2006-01-01

    El presente trabajo intenta ahondar en lo expuesto en un trabajo anterior sobre el downsizing como fenómeno psicosociolaboral, analizando su impacto psicosocial. En primer lugar, se exponen los diferentes niveles de comprensión de este fenómeno, para pasar al análisis de los efectos y consecuencias sobre las personas, diferenciando entre dos tipos de víctimas: a) los que se van de la organización (despedidos) y b) los que se quedan en la organización (supervivientes), prestando especial atenc...

  3. Principios sobre semáforos

    VALENCIA ALAIX, VÍCTOR GABRIEL

    2000-01-01

    Debido a la ausencia de una publicación que reuniese los aspectos más relevantes sobre semáforos y en el marco académico sobre ingeniería de tránsito de los cursos de pregrado y posgrado en Vías y Transporte de la Universidad Nacional de Colombia - Sede Medellín, se ha preparado este documento como guía introductoria a dicho tema. En su preparación se han recogido los tópicos principales de varias publicaciones internacionales y nacionales, además, su desarrollo ha considerado la experi...

  4. Sobre la esclavitud: libro de artista

    MACHADO JIMÉNEZ, ALBERTO

    2015-01-01

    Sobre la esclavitud es un libro de artista, donde encontraremos imágenes acompañadas de breves frases que hacen referencia al tema propuesto en cada ilustración para que así se pueda comprender mejor la intención de este trabajo, reflexionar sobre la manera que tenemos de ver las cosas, en este caso, con respecto a la esclavitud. Dar a conocer distintas formas de ser esclavo en este sistema sería uno de los objetivos principales. Hacer litografías, dibujos con el uso de acua...

  5. Rastros: dizendo sobre os fazeres/dizeres

    MELLO MARISOL BARENCO CORRÊA DE

    2001-01-01

    Com vistas ao aclaramento de noções erroneamente herdadas do contexto social e histórico da cultura moderna ocidental, que teve/tem como um de seus projetos o "apagamento" do sujeito, ou o distanciamento entre os sujeitos e suas formas de fazer, dizer, pensar, este artigo pretende contribuir com elementos para a construção de um outro paradigma nas ciências humanas. Trata-se de um relato sobre o processo de construção de nossa própria pesquisa, articulado à reflexão sobre as diversas formas d...

  6. Consideraciones sobre diferentes procesos productivos y sus consecuencias sobre el medio ambiente

    Caridad Ramos Alvariño

    2004-01-01

    En el presente trabajo se exponen algunas consideraciones sobre diferentes procesos productivos y sus consecuencias sobre el medio ambiente. La disminución del impacto negativo de algunas producciones sobre el medio ambiente es favorable, pero el problema va más allá y de lo que se trata es de la necesidad de una transformación sostenible de las producciones que puedan conducir a una vida agradable y una naturaleza conservada entre otras muchas cuestiones que agobian hoy al mundo. La solución...

  7. Las fuentes cristianas sobre Jesús

    Melero Martínez, J.M.

    2010-01-01

    Full Text Available El artículo es una presentación de las fuentes históricas sobre Jesús de Nazaret: fuentes sinópticas, fuente Q, fuentes afines a la gnosis, fragmentos de evangelio con material sinóptico o joánico, evangelios judeocristianos y otras fuentes.

  8. Sobre o natural e o actor

    Tavares, Margarida

    2010-01-01

    Neste artigo, procura-se reflectir sobre o conceito de natural quando aplicado ao trabalho do actor. Parte-se de quatro relevantes textos da dramaturgia ocidental, a saber: Hamlet, de Shakespeare; Crítica da ‘Escola das mulheres’ e O improviso de Versalhes, de Molière; e O teatro cómico, de Goldoni.

  9. Sobre un sistema no lineal de epidemias

    Ortega S., Luis

    2012-01-01

    Un modelo sobre epidemias que describe la población infectada y la población susceptible de ser infectada en el cual se toma en consideraci6n el efecto de difusión es el siguiente: [Formula Matemática].

  10. Comparisons of fission track age-determination and radioactivation analysis among radiation fields. Characteristic values for pneumatic tube, JRR-3M PN2

    Suzuki, Tatsuro [Kagoshima Univ. (Japan). Faculty of Education; Tomura, Kenji

    1996-01-01

    It is necessary for Fission track age determination and radioactivation analysis to define the energy spectrum of a reactor neutron as the basis for calculating the nuclear reaction rate. This study was made aiming to define the spectrum for PN2 pneumatic tube of No. 3 plant of Japan Atomic Energy Research Institute (JAERI). Characteristics such as conventional flux, cross reaction, neutron temperature and integral fast flux were examined for 3 facilities; JRR-2, JRR-4 and JRR-3M. And the neutron spectrum for each facility was estimated based on the assumptions; Maxwell distribution for thermal neutrons, 1/E for intermediate neutrons and Watt`s formula for fast neutrons. The present results showed that the spectrum for JRR-3M, PN2 was discontinuous in the range from the intermediate to the fast neutron, whereas those for other facilities were found considerably improved. (M.N.)

  11. Behaviour of the radiation of the suprathermal electrons at the Uragan-3M torsatron after rf heating off from ECE measurements

    The microwave radiometry is a well-known diagnostics to obtain the information on temporal evolution and radial profile of the electron temperature at U-3M torsatron plasma experiments. However, under low plasma density with this diagnostics we report on the large production of runaway electrons after RF heating pulse off. We notice a gradually increasing of the radiometer signal at the frequencies that match the second and third harmonics of electron cyclotron emission of the extraordinary mode. This effect could be explained with the existence of the ''runaway'' electrons in U-3M discharge. A phenomenological description of this process is presented, where the time evolution of the ECE radiation signal is compared to the electron density evolution

  12. Feasibility of CDP seismic reflection to image structures in a 200-m deep, 3-m thick coal zone near Palau, Coahuila, Mexico

    Miller, R.D.; Saenz, V.; Huggins, R.J. (Kansas University, Lawrence, KS (USA). Kansas Geological Survey)

    1992-10-01

    The common-depth-point (CDP) seismic-reflection method was used to delineate subsurface structure in a 3-m thick, 220-m deep coal zone in the Palau area of Coahuila, Mexico. An extensive series of walkaway-noise tests was performed to optimize recording parameters and equipment. Reflection events can be interpreted from depths of approximately 100 to 300 m on CDP stacked seismic sections. The seismic data allow accurate identification of the horizontal location of the structure responsible for a drill-discovered 3-m difference in coal-zone depth between boreholes 150m apart. The reflection method can discriminate folding with wavelengths in excess of 20 m and faulting with offset greater than 2 m at this site.

  13. Temporal information needs in ResPubliQA: an attempt to improve accuracy. The UC3M Participation at CLEF 2010

    Vicente-Díez, María Teresa; Moreno Schneider, Julián; Paloma MARTÍNEZ

    2010-01-01

    The UC3M team participates in 2010 in the second ResPubliQA evaluation campaign taking part in the monolingual Spanish task. On this occasion we have completely redesigned our Question Answering system, product of multiple efforts while being part of the MIRACLE team, by creating a whole new architecture. The aim was to gain in modularity, flexibility and evaluation capabilities that previous versions left pending. Despite its initial open-domain philosophy, the new system was tes...

  14. One step synthesis of lamellar R-3m LiCoO2 thin films by an electrochemical-hydrothermal method

    Highlights: · Theoretical calculation of the potential-pH diagram at temperatures between 150 and 200 deg. C. · LiCoO2 films deposited by an original electrochemical and hydrothermal process. · Synthesis of the lamellar R-3m LiCoO2 at temperature as low as 150 deg. C. · Relevant electrochemical performances of as-synthesized films in liquid electrolyte. - Abstract: In this study, we report the synthesis of lamellar R-3m LiCoO2 thin films electrodes for lithium rechargeable batteries by a single step method based on an electrochemical-hydrothermal synthesis in a concentrated LiOH solution with a cobalt salt. This process combines the effect of temperature (between 150 deg. C and 200 deg. C), pressure and galvanostatic current. The obtained films were not annealed after the electrochemical-hydrothermal synthesis. For the first time, the theoretical study of the potential-pH diagram of cobalt was carried out at high temperature and high concentration. These calculations show that a pH value higher than 12 is necessary to avoid the direct precipitation of cobalt hydroxide Co(OH)2 inside the solution. An improvement of the soluble species stability with an increase of the temperature and a decrease of the cobalt concentration is predicted. The influence of the deposition conditions (temperature and concentration) at a constant current density was experimentally studied. X-ray diffraction (XRD) shows the formation of well-crystallized LiCoO2 thin films. Raman spectroscopy confirmed the achievement of the electrochemically active R-3m LiCoO2 phase without any trace of the Fd3m phase at temperatures as low as 150 deg. C. Electrochemical measurements demonstrate good performances of the material synthesized between 150 deg. C and 200 deg. C with better capacity retention at higher temperature.

  15. Analýza obchodních a marketingových aktivit společnosti 3M

    Stašová, Jana

    2010-01-01

    The subject of this diploma thesis is besides the general introduction of the 3M Company and the B2B orientation which becomes more and more important nowadays also the practical part in form of situation analysis of the Automotive Aftermarket Division (AAD) as well as its marketing mix. The target market conditions, customer and competitive environment much like available human resources are important factors having influence on the components of the 4P concept. The objective of the thesis i...

  16. Nature of the Darwin term and (Zα)4m3/M2 contribution to the Lamb shift for an arbitrary spin of the nucleus

    The contact Darwin term is demonstrated to be of the same origin as the spin-orbit interactions. The (Zα)4m3/M2 correction to the Lamb shift, generated by the Darwin term, is found for an arbitrary nonvanishing spin of the nucleus, both half-integer and integer. There is also a contribution of the same nature to the nuclear quadrupole moment

  17. c-jun N-terminal kinase is involved in AUUUA-mediated interleukin-3 mRNA turnover in mast cells.

    Ming, X F; Kaiser, M.; Moroni, C

    1998-01-01

    Whereas signalling pathways involved in transcriptional control have been studied extensively, the pathways regulating mRNA turnover remain poorly understood. We are interested in the role of mRNA stability in cell activation and oncogenesis using PB-3c mast cells as a model system. In these cells the short-lived interleukin-3 (IL-3) mRNA is stabilized by ionomycin treatment and following oncogenesis. To identify the signalling pathways involved in these mechanisms, we analysed the effect of ...

  18. Measurement of the radiative L3-M vacancy transfer probabilities of some 4f elements and compounds using Indus-2 synchrotron radiation

    Krishnananda; Mirji, Santosh; Badiger, N. M.; Tiwari, M. K.

    2016-08-01

    The L X-ray intensity ratios (ILα/ILl, ILα/ILβ, ILα/ILγ) and the radiative L3-M vacancy transfer probabilities (ηL3-M) of some 4f elements such as Gd, Tb, Ho and compounds; Pr2O3, Pr2(CO3)3·8H2O, Nd2O3, Sm2O3, Sm2(CO3)3·2.85H2O, Sm2(SO4)3·8H2O, Gd2(CO3)3, Tb2O3, Dy2(SO4)3, Ho2O3 and HoF3 have been measured using Indus-2 synchrotron radiation. The elements and compounds are excited by synchrotron radiation and the emitted characteristic L X-ray photons are measured with high resolution silicon drift detector. The measured intensity ratios of compounds are not influenced by the chemical environment. However, the ηL3-M values of compound targets indicate the effect of crystal structure.

  19. SRG3/mBAF155 stabilizes the SWI/SNF-like BAF complex by blocking CHFR mediated ubiquitination and degradation of its major components

    Highlights: ► CHFR mediates the ubiquitination of the major components of the SWI/SNF complex. ► CHFR mediated-ubiquitination induces the degradation of the major components. ► SRG3 stabilizes the SWI/SNF-like BAF complex by blocking the CHFR activity. -- Abstract: The murine SWI/SNF-like BAF complex is an ATP-dependent chromatin remodeling complex that functions as a transcriptional regulator in cell proliferation, differentiation and development. The SWI/SNF-like BAF complex consists of several components including core subunits such as BRG1, BAF155/SRG3, BAF47/SNF5/INI1, and BAF170. We have previously shown that the interaction between SRG3/mBAF155 and other components of the complex stabilizes them by attenuating their proteasomal degradation. However, it has not been known how the major components of the SWI/SNF-like BAF complex such as BRG1, SNF5, and BAF60a are targeted for the ubiquitination and degradation, and how SRG3/mBAF155 protects them from the degradation process. Here we report that CHFR interacts with BRG1, SNF5, and BAF60a of the SWI/SNF-like BAF complex and ubiquitinates them to target for degradation through a proteasome-mediated pathway, and that SRG3/mBAF155 stabilizes these components by blocking their interaction with CHFR.

  20. Ferroelectric and magnetic properties of Aurivillius Bi{sub m+1}Ti{sub 3}Fe{sub m−3}O{sub 3m+3} thin films

    Jia, Tingting, E-mail: jia.tingting@nims.go.jp; Kimura, Hideo, E-mail: KIMURA.Hideo@nims.go.jp [National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan); Cheng, Zhenxiang [Institute for Superconducting and Electronic Materials, University of Wollongong, Squires Way, North Wollongong, New South Wales 2500 (Australia); Zhao, Hongyang [Department of Materials Science and Engineering, Wuhan Institute of Technology, No. 693 Xiongchu Road, Wuhan 430074 (China)

    2015-11-15

    Aurivillius Bi{sub m+1}Ti{sub 3}Fe{sub m−3}O{sub 3m+3} (m = 4, 5, 6) thin films have been deposited by a pulsed laser deposition system. The x-ray diffraction patterns indicate the formation of orthorhombic phase. The remanent polarization (2P{sub r}) of Bi{sub m+1}Ti{sub 3}Fe{sub m−3}O{sub 3m+3} thin films is decreased with the m-number. Positive-up-negative-down measurements indicate the presence of ferroelectric (FE) polarization in as-obtained thin films. Piezoresponse force microscopy investigations confirm the existence of FE domains and the switchable polarization. Weak magnetic moment is detected in the Aurivillius films at room temperature. The present work suggests the possibility of Aurivillius Bi{sub m+1}Ti{sub 3}Fe{sub m−3}O{sub 3m+3} (m = 4, 5, 6) materials as potential room-temperature multiferroics.

  1. Expression of CYP2A3 mRNA and its regulation by 3-methylcholanthrene, pyrazole, and ß-ionone in rat tissues

    A.B. Robottom-Ferreira

    2003-07-01

    Full Text Available Cytochrome P450 (CYP 2A enzymes are involved in the metabolism of numerous drugs and hormones and activate different carcinogens. Human CYP2A6, mouse CYP2A5 and rat CYP2A3 are orthologous enzymes that present high similarity in their amino acid sequence and share substrate specificities. However, different from the human and mouse enzyme, CYP2A3 is not expressed in the rat liver. There are limited data about expression of CYP2A3 in extrahepatic tissues and its regulation by typical CYP inducers. Therefore, the objective of the present study was to analyze CYP2A3 mRNA expression in different rat tissues by RT-PCR, and to study the influence of 3-methylcholanthrene, pyrazole and ß-ionone treatment on its expression. Male Wistar rats were divided into four groups of 5 rats each, and were treated ip for 4 days with 3-methylcholanthrene (25 mg/kg body weight, pyrazole (150 mg/kg body weight, ß-ionone (1 g/kg body weight, or vehicle. Total RNA was extracted from tissues and CYP2A3 mRNA levels were analyzed by semiquantitative RT-PCR. CYP2A3 mRNA was constitutively expressed in the esophagus, lung and nasal epithelium, but not along the intestine, liver, or kidney. CYP2A3 mRNA levels were increased in the esophagus by treatment with 3-methylcholanthrene and pyrazole (17- and 7-fold, respectively, in lung by pyrazole and ß-ionone (3- and 4-fold, respectively, although not statistically significant, in the distal part of the intestine and kidney by 3-methylcholanthrene and pyrazole, and in the proximal part of the intestine by pyrazole. CYP2A3 mRNA was not induced in nasal epithelium, liver or in the middle part of the intestine. These data show that, in the rat, CYP2A3 is constitutively expressed in several extrahepatic tissues and its regulation occurs through a complex mechanism that is essentially tissue specific.

  2. Influence of chisel width on shear bond strength of composite to enamel = Influência da largura do cinzel sobre a resistência ao cisalhamento da união esmalte/resina composta

    Oliveira, Antônio Carlos Castellan de

    2009-01-01

    Objetivo: Avaliar a influência de diferentes larguras de cinzel sobre a resistência de união ao cisalhamento na interface esmalte dental/resina composta. Metodologia: As coroas de 60 dentes incisivos bovinos foram incluídas em resina acrílica e as superfícies vestibulares de esmalte foram planificadas e condicionadas com ácido fosfórico a 35 %. O sistema adesivo Single Bond (3M/ESPE) e de resina composta Z-250 (3M/ESPE) foram utilizados para fabricar restaurações cilíndricas de resina compost...

  3. 前列腺癌患者手术前后外周血调节性T细胞和FOXP3mRNA的表达及临床意义%Levels of CD4+CD25+Regulatory T Cells & Expression of FOXP3 mRNA after Operation in Peripheral Blood from Patients with Prostate Cancer and its Clinical Significance

    章更生

    2011-01-01

    目的 探讨前列腺癌(Pca)患者手术前后外周血CD4+CD25+调节性T细胞(Tregs)及其特异标志物FOXP3mRNA的表达比例的变化及临床意义.方法 应用流式细胞术检测50例前列腺癌及50例正常对照组外周血单个核细胞(PBMC)中Tregs占CD4+T细胞的比例,应用RT-PCR技术检测人外周血PBMC FOXP3 mRNA的表达.结果 随着Gleason分级升高,CD4+CD25+Tregs/CD4+T比值和FOXP3 mRNA表达量均有升高趋势;Pca患者术前CD4+CD25+ Treg细胞占CD4+T细胞的比例和FOXP3 mRNA表达水平高于正常对照组(均P<0.05),术后水平与正常对照组差异无统计学意义;Pca组Tregs表达率与FOXP3 mRNA呈正相关(r=0.623,P<0.01).结论 Tregs及其特异标志物FOXP3具有维持自身免疫稳定和抑制肿瘤免疫作用,可能参与前列腺癌的发生.%Objective To explore the rate change of CD4+ CD25+ regulatory T cells and expression of F0XP3 mRNA after operation in peripheral blood from patients with prostate cancer and its clinical significance. Methods Flow cytometry was used to analyze the proportion of CD4+CD25+ regulatory T cells/CD4T cells in peripheral blood mononuclear cells (PBMC) among 50 patients with prostate cancer and 50 healthy controls. The expression of FOXP3 mRNA in PBMC was detected by RT-PCR. Results The value of CD4+CU25+Tregs/CD4+ T cells and expression of FOXP3 mRNA were increased with Gleason pathological parameters increased. And the value of CD4+CD25+ regulatory T cells/CD4+T cells and expression of FOXP3 mRNA in PBMC from patients with prostate cancer before operation were significantly higher than that of the healthy controls. But there were no statistical significance between patients with prostate cancer after operation and healthy controls. Correlative analysis showed that there was a positive correlation between the CD4+CD25+ regulatory T cells and the expression of F0XP3 mRNA in PBMC of the patients with prostate cancer (r=0.623,p<0.01). Conclusion CD4+CD25

  4. Diferentes visões sobre a cidade

    Veriano Takuji Miura

    2010-06-01

    Full Text Available A paisagem urbana sempre exerceu um fascínio sobre os homens. Ela tem sido, ao mesmo tempo, sonho e pesadelo de um tempo. Em diferentes momentos, a paisagem urbana tem sido abordada de modo a expressar as singularidades de seu tempo. Nesse sentido, o objetivo deste artigo é trazer uma discussão sobre as diferentes visões da cidade propostas por acadêmicos, cineastas e romancistas. Desde a visão romantizada das cidades da Idade Média, de Ítalo Calvino, até as “cidades virtuais” de Pierre Lévy, destaca-se o longo percurso da chamada “aventura da modernidade”.

  5. El problema de Steklov sobre el cono

    Óscar Andrés Montaño Carreño

    2012-01-01

    Sea (Mn, g) un cono de altura 0 ≤ xn+1 ≤ 1 en R n+1, dotado con una métrica rotacionalmente invariante 2ds2 + f 2 (s)dw2 , donde dw2 representa la métrica estándar sobre S n−1 , la esfera unitaria (n − 1)-dimensional. Supongamos que Ric(g) ≥ 0. En este artículo demostramos que si h > 0 es la curvatura media sobre ∂M y ν1 es el primer valor propio del problema de Steklov, entonces ν1 ≥ h. Abstract. Let (Mn, g) be a cone of height 0 ≤ xn+1 ≤ 1 in R ...

  6. Productos derivados sobre bienes de consumo

    Francisco Venegas Martinez; Salvador Cruz Ake

    2010-01-01

    Este trabajo de investigacion desarrolla un modelo de equilibrio general con expectativas racionales en tiempo continuo util para la determinacion de precios de contratos forward, contratos futuros, bonos cupon cero y opciones europeas (de compra y venta) sobre bienes de consumo. Para ello, el modelo considera un individuo representativo en una economia con dos bienes, los cuales son producidos con tecnologias estocasticas. Por ultimo, el modelo propuesto permite examinar estrategias para obt...

  7. Apuntes sobre la flora gallega, XVII

    Amigo Vázquez, Javier; Pulgar Sañudo, Íñigo

    2005-01-01

    Presentamos un nuevo capítulo dentro de la serie de contribuciones al conocimiento actualizado de la Flora de Galicia, aportando información de interés corológico sobre 11 taxa recolectados: Bidens frondosa L., Crypsis alopecuroides (Piller & Mitterp.) Schrad., Cyperus fuscus L., Cyperus michelianus (L.) Link, Dittrichia graveolens (L.) Desf., Echinochloa crus-galli (L.) P. Beauv. subsp. hispidula (Retz.) Honda, Eragrostis curvula (Schrad.) Nees, Hypericum hirsutum L., Lindernia dubia (L.) Pe...

  8. Reflexiones sobre el concepto de justicia

    Víctor C. Pascual Planchuelo

    2005-06-01

    Full Text Available Este ensayo constituye una reflexión sobre el concepto de Justicia. No se centra, como tantos estudios al respecto, en el plano teórico y metafísico, sino que atiende problemas de mayor actualidad: la opinión de los ciudadanos, la postura de los profesionales y otros asuntos controvertidos del ámbito del Derecho.

  9. Neopolares de problemas de empaquetamiento sobre semigrupos

    Aráoz Durand, Julián Arturo

    1982-01-01

    Los neopolares permiten caracterizar las caras de un poliedro combinatorio como vértices de poliedros altamente estructurados. Esto sirve para generar planos de cortes y para obtener propiedades duales en problemas de programación entera. Gomory caracterizó neopolares para problemas sobre grupos, Aráoz en "Polyhedral Neopolarities" extendió estos resultados a semigrupos de cubrimiento. En este trabajo se caracterizan neopolares importantes de semigrupos de empaquetamiento que incluyen los pro...

  10. Consideraciones sobre la motricidad del violinista

    Allende, Pablo

    2009-01-01

    Comienza la exposición hablando de que intenta prevenir las patologías en los violinistas mediante secuencias de ejercicios específicos, de diferentes técnicas corporales y fisioterapéuticas. Presenta datos estadísticos sobre el índice de patologías que se encuentran entre estos intérpretes para por último presentar tablas de ejercicios propiamente dichas para intentar paliar estas dolencias

  11. First-order ion-optics calculations for an Accelerator Mass Spectrometry system using SRIM and S{sup 3}M

    Gomez-Guzman, J.M., E-mail: jm_gomez@us.es [Centro Nacional de Aceleradores (CNA), Avda. Thomas Alva Edison 7, Isla de la Cartuja, 41092 Seville (Spain); Dpto. de Fisica Atomica, Molecular y Nuclear, University of Seville (Spain); Gomez-Morilla, I. [Technische Universitaet Dresden, Fakultaet Maschinenwesen, Professur fuer Magnetofluiddynamik (Germany); Enamorado-Baez, S.M.; Moreno Suarez, A.I.; Pinto-Gomez, A.R. [Centro Nacional de Aceleradores (CNA), Avda. Thomas Alva Edison 7, Isla de la Cartuja, 41092 Seville (Spain)

    2012-06-15

    In this paper, we describe the transport of a simulated beam, created with the S{sup 3}M beam generation module, along the real beam line of the Accelerator Mass Spectrometry (AMS) facility located at Centro Nacional de Aceleradores (CNA, Seville, Spain). The beam transport through the optical system was determined using the transfer-matrix method, which can easily calculate the beam envelopes without having to track all individual particles, evaluating the ability of such systems and saving computation time. The beam size results given by S{sup 3}M were compared to the real beam size in three of the four image points that the system has (P1, P2 and P3), corresponding with the position of Faradays Cups where the {sup 127}I current was measured, obtaining a good agreement between them. This suggests that the first order approximation model is enough to simulate the optical behavior of the system. It is shown that the beam line has a focusing behavior, minimizing the beam size from {+-}3 mm at the exit of the ion source to {+-}1.09 mm at the detector's entrance window. Using the beam emittance diagram simulations, it is shown that when ions pass through the stripper, the angles of their trajectories are altered by scattering with the gas molecules and the geometrical emittance enlarges, according to Liouville's Theorem. The study presented in this work gives confidence and open new perspectives in simulations with S{sup 3}M in AMS facilities contributing to the understanding of their optical behavior.

  12. Vocación de referente internacional. La UC3M y la Fundación Juan March crean un instituto de Ciencias Sociales

    Gomá, Javier; Sánchez-Cuenca, Ignacio; Peña, Daniel

    2013-01-01

    El pasado 31 de enero Daniel Peña, rector de la UC3M; Javier Gomá, director de la Fundación Juan March; e Ignacio Sánchez-Cuenca, director del Centro de Estudios Avanzados en Ciencias Sociales (CEACS) de dicha fundación, presentaron el Instituto Carlos III – Juan March de Ciencias Sociales. Este nuevo centro mixto tiene la misión de continuar y desarrollar las actividades y la investigación del CEACS y convertirse en un centro de referencia internacional en su ámbito.

  13. Determination of boron in ceramic reference materials by prompt gamma activation analysis using focused neutron guided beam of JRR-3M

    Prompt gamma activation analysis using a focused thermal neutron guided beam at JAEA JRR-3M was applied to the determination of B in ceramic certified reference materials (BAM CRM S-003 Silicon Carbide Powder and NMIJ CRM 8004-a Silicon Nitride Powder). Cl and Si were used as internal standards to obtain linear calibration curves of B. The analytical result of B in BAM CRM S-003 was in good agreement with the certified value. The relative expanded measurement uncertainties (k = 2) were 4.8% for BAM CRM S-003 and 4.9% for NMIJ CRM 8004-a. (author)

  14. Structural and electronic properties of ScnOm (n=1~3, m=1~2n) clusters: Theoretical study using screened hybrid density functional theory

    Yang, Yu; Liu, Haitao; Zhang, Ping

    2011-01-01

    The structural and electronic properties of small scandium oxide clusters ScnOm (n = 1 - 3, m = 1 - 2n) are systematically studied within the screened hybrid density functional theory. It is found that the ground states of these scandium oxide clusters can be obtained by the sequential oxidation of small "core" scandium clusters. The fragmentation analysis demonstrates that the ScO, Sc2O2, Sc2O3, Sc3O3, and Sc3O4 clusters are especially stable. Strong hybridizations between O-2p and Sc-3d orb...

  15. The expression of DcR3 mRNA in peripheral blood mononuclear cells from patients with Guillain-Barré syndrome%吉兰-巴雷综合征外周血单个核细胞DcR3mRNA表达

    陆嘉茵; 李静; 朱太卿; 田发发; 杨欢; 陈毓茜

    2011-01-01

    Objective To investigate the expression of DcR3 mRNA in peripheral blood mononuclear cells (PBMCs) from patients with Guillain-Barré syndrome (GBS).And to discuss the correlation among cerebrospinal fluid (CSF) -Ig, the severity of GBS and DcR3 mRNA.Methods Thirty-six patients with GBS and 20 healthy controls were included.The expression of DcR3 mRNA in PBMCs was detected by reverse transcription-polymerase chain reaction (RT-PCR).The correlation between the severity of GBS and the expression of DcR3 mRNA was analyzed.The CSF level of CSF-Ig was also analyzed.Results DcR3 mRNA level in GBS patients (0.40 ± 0.08) was significantly higher than in the healthy control (0.17 ± 0.04) (P<0.01).The expression of DcR3 mRNA was comparable between the mild group (0.39 ±0.07) and the severe group (0.41±0.05) (P>0.05).The level of CSF-Ig was also comparable between the mild group [IgG (0.l23 ±0.113) g/L, IgA (0.016± 0.012) g/L, IgM (0.012 ±0.011) g/L]and the severe group [IgG (0.128 ±0.112) g/L, IgA (0.015 ± 0.011) g/L, IgM (0.013±0.013) g/L](P>0.05).There was no correlation between the levels of CSF-Ig and DcR3 mRNA (rIgG = 0.0083, rIgA = 0.0056, rIgM = 0.0015, P> 0.05).Conclusions The expression of DcR3 mRNA in PBMCs increased significantly in GBS patients, indicating that DcR3 could be involved in the pathogenesis of GBS.There was no correlation between GBS severity and DcR3 mRNA level or between CSF-Ig and DcR3 mRNA levels.%目的 研究吉兰-巴雷综合征(Guillain-Barré syndrome,GBS)患者外周血单个核细胞(PBMCs)中凋亡相关基因诱骗受体(DCR3)mRNA的表达水平.探讨DcR3与GBS疾病严重程度及脑脊液免疫球蛋白(CSFIg,包括IgG、IgA、IgM)水平之间的关联性.方法 以36例GBS患者和20名健康人为研究对象,应用反转录聚合酶链反应(RT-PCR)检测外周静脉血PBMCs DcR3 mRNA表达水平,并对GBS患者CSF-Ig水平与疾病严重程度和DcR3 mRNA表达的相关性进行分析.结果 GBS

  16. 寻常型银屑病患者外周血单个核细胞SOCS-1、SOCS-3 mRNA的表达%The expression of SOCS-1 and SOCS-3 mRNA in patients with psoriasis vulgaris

    郭红卫; 王京滨; 李国明; 李顺凡; 吴志华

    2007-01-01

    目的: 检测细胞因子信号抑制因子SOCS-1、SOCS-3 mRNA在寻常型银屑病患者外周血单个核细胞(PBMC)中的表达.方法: 从20例银屑病患者及20例健康志愿者外周血中分离PBMC,提取RNA,应用逆转录-聚合酶链反应(RT-PCR)方法检测SOCS-1、SOCS-3 mRNA的表达.结果: SOCS-1、SOCS-3 mRNA在银屑病患者中表达,在正常人中无表达,活动期银屑病患者较静止期患者SOCS-1、SOCS-3 mRNA表达增高.结论: SOCS-1、SOCS-3可能在银屑病的Th1免疫反应中发挥作用.

  17. Expressions of T-bet, GATA-3, RORγt and FoxP3 mRNA in peripheral blood of patients with allergic asthma%过敏性哮喘患者外周血T-bet、GATA-3、RORγt和FoxP3 mRNA的表达变化

    施宇衡; 时国朝; 马佳韵; 艾香艳; 朱海星; 万欢英

    2011-01-01

    Objective To investigate the expressions of T-bet, GA TA-3, RORγt and FoxP3 mRNA in peripheral blood of patients with allergic asthma. Methods Seventeen patients with mild persistent and 13 patients with moderate-severe persistent house dust mite allergic asthma and 14 healthy controls were enrolled in this study.Expressions of T-bet,GATA-3,RORγt and FoxP3 mRNA in peripheral blood mononuclear cell (PBMC) were determined by quantitative fluorescence PCR. Results Expression of GATA-3 mRNA in mild and moderate-severe asthma patients was significantly higher than that in normal controls (P<0.01). Furthermore, expression of RORγt mRNA in patients with moderate-severe asthma was significantly higher than that in mild asthma patients and normal controls (P<0.01). However, there was no difference in expressions of T-bet and FoxP3 mRNA among these three groups (P>0.05). Conclusions GATA-3 expression was increased in allergic asthma,and RORγt expression was increased in moderate-severe allergic asthma. GA TA-3 and RORγt may play important role in the pathogenesis of allergic asthma.%目的:探讨特异性转录因子T-bet、GATA-3、RORγt和FoxP3 mRNA在过敏性哮喘患者外周血中的表达变化.方法:选择30例慢性持续期的屋尘螨过敏性哮喘患者,其中轻度哮喘17例、中重度哮喘13例,14名正常人作为对照.通过荧光实时定量PCR方法检测3组患者外周血单个核细胞(PBMC)中T-bet、GATA-3、RORγt和FoxP3mRNA的表达.结果:轻度和中重度哮喘患者的GATA-3 mRNA表达均显著高于正常人(均P0.05).结论:过敏性哮喘中GATA-3表达增加,中重度哮喘中RORγt表达增加,GATA-3和RORγt在哮喘发病中起着重要的作用.

  18. Pensamiento ciceroniano sobre el rol del ciudadano en la obra “Sobre los deberes”

    Luis Diego Brenes Villalobos

    2013-01-01

    Full Text Available : El ensayo repasa -en los orígenes del republicanismo- el aporte realizado por uno de sus autores clásicos más importante, Marco Tulio Cicerón. En concreto, se revisa la visión de este sobre el rol del ciudadano y el concepto de ciudadanía como intrínsecamente ligada a la República y a la concepción del humanismo. Al efecto, el ensayo se centra en la obra “Sobre los deberes” (De officiis.

  19. The degree of leukocytosis and urine GATA-3 mRNA levels are risk factors for severe acute kidney injury in Puumala virus nephropathia epidemica.

    Daniel H Libraty

    Full Text Available Puumala hantavirus (PUUV infection, also known as nephropathia epidemica, is the most common cause of hemorrhagic fever with renal syndrome (HFRS in Europe. The pathogenesis of PUUV nephropathia epidemica is complex and multifactorial, and the risk factors for severe acute kidney injury (AKI during acute PUUV infection are not well defined. We conducted a prospective study of hospitalized patients with PUUV infection in Tampere, Finland to identify acute illness risk factors for HFRS severity. Serial daily blood and urine samples were collected throughout acute illness and at 2 week and 6 month convalescent visits. By univariate analyses, the maximum white blood cell count during acute illness was a risk factor for severe AKI. There were no significant associations between PUUV-induced AKI severity and platelet counts, C-reactive protein, or alanine aminotransferase levels. Maximum plasma interleukin (IL-6, urine IL-6, and urine IL-8 concentrations were positively associated with PUUV-induced AKI. Finally, the maximum urinary sediment GATA-3 mRNA level was positively correlated with the peak fold-change in serum creatinine, regardless of AKI severity classification. By multivariate analyses, we found that the maximum levels of leukocytes and urinary sediment GATA-3 mRNA during acute illness were independent risk factors for severe PUUV-induced AKI. We have identified novel acute illness risk factors for severe PUUV-induced AKI.

  20. Epidermal growth factor potentiates in vitro metastatic behaviour of human prostate cancer PC-3M cells: involvement of voltage-gated sodium channel

    Uysal-Onganer Pinar

    2007-11-01

    Full Text Available Abstract Background Although a high level of functional voltage-gated sodium channel (VGSC expression has been found in strongly metastatic human and rat prostate cancer (PCa cells, the mechanism(s responsible for the upregulation is unknown. The concentration of epidermal growth factor (EGF, a modulator of ion channels, in the body is highest in prostatic fluid. Thus, EGF could be involved in the VGSC upregulation in PCa. The effects of EGF on VGSC expression in the highly metastatic human PCa PC-3M cell line, which was shown previously to express both functional VGSCs and EGF receptors, were investigated. A quantitative approach, from gene level to cell behaviour, was used. mRNA levels were determined by real-time PCR. Protein expression was studied by Western blots and immunocytochemistry and digital image analysis. Functional assays involved measurements of transverse migration, endocytic membrane activity and Matrigel invasion. Results Exogenous EGF enhanced the cells' in vitro metastatic behaviours (migration, endocytosis and invasion. Endogenous EGF had a similar involvement. EGF increased VGSC Nav1.7 (predominant isoform in PCa mRNA and protein expressions. Co-application of the highly specific VGSC blocker tetrodotoxin (TTX suppressed the effect of EGF on all three metastatic cell behaviours studied. Conclusion 1 EGF has a major involvement in the upregulation of functional VGSC expression in human PCa PC-3M cells. (2 VGSC activity has a significant intermediary role in potentiating effect of EGF in human PCa.

  1. Y chromosome haplotype diversity in Mongolic-speaking populations and gene conversion at the duplicated STR DYS385a,b in haplogroup C3-M407.

    Malyarchuk, Boris A; Derenko, Miroslava; Denisova, Galina; Woźniak, Marcin; Rogalla, Urszula; Dambueva, Irina; Grzybowski, Tomasz

    2016-06-01

    Y chromosome microsatellite (Y-STR) diversity has been studied in different Mongolic-speaking populations from South Siberia, Mongolia, North-East China and East Europe. The results obtained indicate that the Mongolic-speaking populations clustered into two groups, with one group including populations from eastern part of South Siberia and Central Asia (the Buryats, Barghuts and Khamnigans) and the other group including populations from western part of Central Asia and East Europe (the Mongols and Kalmyks). High frequency of haplogroup C3-M407 (>50%) is present in the Buryats, Barghuts and Khamnigans, whereas in the Mongols and Kalmyks its frequency is much lower. In addition, two allelic combinations in DYS385a,b loci of C3-M407 haplotypes have been observed: the combination 11,18 (as well as 11,17 and 11,19) is frequent in different Mongolic-speaking populations, but the 11,11 branch is present mainly in the Kalmyks and Mongols. Results of locus-specific sequencing suggest that the action of gene conversion is a more likely explanation for origin of homoallelic 11,11 combination. Moreover, analysis of median networks of Y-STR haplotypes demonstrates that at least two gene conversion events can be revealed-one of them has probably occurred among the Mongols, and the other event occurred in the Barghuts. These two events give an average gene conversion rate range of 0.24-7.1 × 10(-3) per generation. PMID:26911356

  2. Exploring artificial layered heterostructures of LaM'O3/LaM''O3 (M'M''= NiCr, FeCr and NiV).

    Liu, J.; Kareev, M.; Freeland, J. W.; Kareev, A.; Lee, H. N.; Chakhalian, J.

    2008-03-01

    Digital synthesis of atomically sharp interfaces between strongly correlated electron systems can provide a template to build completely new materials. Here we present our results on magnetism and electronic structure in LaM'O3/LaM''O3 (M'M''= NiCr, FeCr and NiV) superlattices by using polarized X-ray spectroscopies. Using laser MBE, the (111) and (100) oriented ultra-thin superlattices were grown with alternating layer thicknesses of 1 unit cell. In the bulk, LaMO3 (M=Cr,Fe,V) are antiferromagnetic insulators while LaNiO3 is a paramagnetic metal. The evolution of element specific magnetism and charge at the interface of LFO/LCO, LNO/LVO and LNO/LCO superlattices with temperature and an applied magnetic field will be discussed in detail. The superlattice results will be contrasted to the bulk magnetic properties of the constituent layers. The work has been supported by U.S. DOD-ARO under Contract No. 0402-17291.

  3. New rock salt-related oxides Li{sub 3}M{sub 2}RuO{sub 6} (M=Co, Ni): Synthesis, structure, magnetism and electrochemistry

    Laha, S. [Departamento de Químicas Inorganica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid (Spain); Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012 (India); Morán, E., E-mail: emoran@quim.ucm.es [Departamento de Químicas Inorganica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid (Spain); Sáez-Puche, R.; Alario-Franco, M.Á.; Dos santos-Garcia, A.J. [Departamento de Químicas Inorganica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid (Spain); Gonzalo, E.; Kuhn, A.; García-Alvarado, F. [Universidad CEU San Pablo, Facultad de Farmacia, Departamento de Química, 28668 Boadilla del Monte, Madrid (Spain); Sivakumar, T.; Tamilarasan, S.; Natarajan, S.; Gopalakrishnan, J. [Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012 (India)

    2013-07-15

    We describe the synthesis, crystal structure, magnetic and electrochemical characterization of new rock salt-related oxides of formula, Li{sub 3}M{sub 2}RuO{sub 6} (M=Co, Ni). The M=Co oxide adopts the LiCoO{sub 2} (R-3m) structure, where sheets of LiO{sub 6} and (Co{sub 2}/Ru)O{sub 6} octahedra are alternately stacked along the c-direction. The M=Ni oxide also adopts a similar layered structure related to Li{sub 2}TiO{sub 3}, where partial mixing of Li and Ni/Ru atoms lowers the symmetry to monoclinic (C2/c). Magnetic susceptibility measurements reveal that in Li{sub 3}Co{sub 2}RuO{sub 6}, the oxidation states of transition metal ions are Co{sup 3+} (S=0), Co{sup 2+} (S=1/2) and Ru{sup 4+} (S=1), all of them in low-spin configuration and at 10 K, the material orders antiferromagnetically. Analogous Li{sub 3}Ni{sub 2}RuO{sub 6} presents a ferrimagnetic behavior with a Curie temperature of 100 K. The differences in the magnetic behavior have been explained in terms of differences in the crystal structure. Electrochemical studies correlate well with both magnetic properties and crystal structure. Li-transition metal intermixing may be at the origin of the more impeded oxidation of Li{sub 3}Ni{sub 2}RuO{sub 6} when compared to Li{sub 3}Co{sub 2}RuO{sub 6}. Interestingly high first charge capacities (between ca. 160 and 180 mAh g{sup −1}) corresponding to ca. 2/3 of theoretical capacity are reached albeit, in both cases, capacity retention and cyclability are not satisfactory enough to consider these materials as alternatives to LiCoO{sub 2}. - Graphical abstract: Two new rock salt related oxides of formula, Li{sub 3}M{sub 2}RuO{sub 6}, (M=Co, Ni) have been prepared. The M=Co oxide adopts the LiCoO{sub 2} (R-3m) structure and the M=Ni oxide adopts a similar layered structure related to Li{sub 2}TiO{sub 3,} monoclinic (C2/c), with partial mixing of Li and Ni/Ru atoms. For Li{sub 3}Co{sub 2}RuO{sub 6}, oxidation state for Ru is 4+ and antiferromagnetic (AFM) order is

  4. New rock salt-related oxides Li3M2RuO6 (M=Co, Ni): Synthesis, structure, magnetism and electrochemistry

    We describe the synthesis, crystal structure, magnetic and electrochemical characterization of new rock salt-related oxides of formula, Li3M2RuO6 (M=Co, Ni). The M=Co oxide adopts the LiCoO2 (R-3m) structure, where sheets of LiO6 and (Co2/Ru)O6 octahedra are alternately stacked along the c-direction. The M=Ni oxide also adopts a similar layered structure related to Li2TiO3, where partial mixing of Li and Ni/Ru atoms lowers the symmetry to monoclinic (C2/c). Magnetic susceptibility measurements reveal that in Li3Co2RuO6, the oxidation states of transition metal ions are Co3+ (S=0), Co2+ (S=1/2) and Ru4+ (S=1), all of them in low-spin configuration and at 10 K, the material orders antiferromagnetically. Analogous Li3Ni2RuO6 presents a ferrimagnetic behavior with a Curie temperature of 100 K. The differences in the magnetic behavior have been explained in terms of differences in the crystal structure. Electrochemical studies correlate well with both magnetic properties and crystal structure. Li-transition metal intermixing may be at the origin of the more impeded oxidation of Li3Ni2RuO6 when compared to Li3Co2RuO6. Interestingly high first charge capacities (between ca. 160 and 180 mAh g−1) corresponding to ca. 2/3 of theoretical capacity are reached albeit, in both cases, capacity retention and cyclability are not satisfactory enough to consider these materials as alternatives to LiCoO2. - Graphical abstract: Two new rock salt related oxides of formula, Li3M2RuO6, (M=Co, Ni) have been prepared. The M=Co oxide adopts the LiCoO2 (R-3m) structure and the M=Ni oxide adopts a similar layered structure related to Li2TiO3, monoclinic (C2/c), with partial mixing of Li and Ni/Ru atoms. For Li3Co2RuO6, oxidation state for Ru is 4+ and antiferromagnetic (AFM) order is found below 10 K while for the analogous Li3Ni2RuO6 , Ru oxidation state is 5+ and a ferrimagnetic (FM) behavior with a Curie temperature of 100 K is found. Electrochemical studies correlate well with both

  5. Soportes apoyados sobre vigas pretensadas (EE. UU.

    Editorial, Equipo

    1965-12-01

    Full Text Available This work has been awarded a prize by the Prestreesed Concrete Institute. It refers to a number of flyovers on the Arroyo Seco, of California. This river has been canalized, to help drainage in case of heavy rainfall. The canal runs through a highly populated zone, and a motor road and accessory ramps had to cross the canal. The resulting design involves three prestressed girders, lightly arched in a parabolic outline, resting on each river shore, running along the line of the bridge, over the canal. It was decided that the bridge piles should not rest on the river bed, in order not to reduce its flow capacity. The girders of a maximum length of 39 ms, are box shaped, and stiffened with thin diaphragms. The cylindrical pile, 1.50 m in diameter, is an integral part of the girder, and applies to it a concentrated load of about 4000 tons. The girders rest on reinforced concrete cubes, which in turn are supported by concrete slabs and piles driven into the soil.Esta obra ha sido premiada por el Prestressed Concrete Institute y se refiere a una serie de pasos superiores sobre el Arroyo Seco, en California, que se ha canalizado para servir de desagüe en el caso de avenidas torrenciales. El canal se halla en una zona de edificación densa y se trata del paso—sobre aquél—de una autopista y rampas de acceso. La solución adoptada consistió en tres vigas pretensadas, ligeramente arqueadas con perfil parabólico, apoyadas en las dos márgenes y situadas en correspondencia con los tres soportes, sobre el propio canal, ya que ninguno de aquéllos debía apoyarse en el lecho de este último al objeto de no disminuir su capacidad de desagüe. Las vigas—de unos 39 m de longitud la mayor—son del tipo cajón, rigidizadas con unos diafragmas de pequeño espesor. El soporte cilíndrico, de 1,50 m de diámetro, se solidariza con la viga y le transmite una notable carga concentrada, del orden de 4.000 toneladas. Los apoyos de estas vigas son simples dados

  6. Comentarios sobre dibujo analítico

    Mata Botella, Elena

    2004-01-01

    Cuaderno de apoyo a la docencia del DIBUJO DE ARQUITECTURA que pretende hacer reflexionar al alumno (de primero o segundo de carrera) sobre un tipo de dibujo que aquí se ha llamado “dibujo analítico”. Un dibujo que a través de operaciones gráficas y conceptuales como la esquematización y la selección de información, tiende a alejarse de la descripción del objeto arquitectónico para adentrarse en determinados aspectos o dimensiones que subyacen en el proyecto arquitectónico. Unas notas intr...

  7. Claves sobre el poder de las mujeres

    García de León Álvarez, María Antonia

    2012-01-01

    El objeto de este texto es esbozar una síntesis sobre algunos nudos de mi obra en el área de Género y Poder. El estudio del poder es un punto de partida ineludible para abordar todo tema de Género, es decir, es necesario arrancar desde la comprensión del fenómeno social del poder, ya que el Patriarcado es un sistema estructurado de poder por género. Este punto de partida indica la relevancia del tema (nada más ni nada menos que el poder, tema clave en las Ciencias Sociales).

  8. Mapping sobre arquitecturas heterogéneas

    De Giusti, Laura Cristina

    2008-01-01

    La programación de algoritmos paralelos, a diferencia de los algoritmos secuenciales, no cuenta para su representación con un único modelo. Esa carencia ocasiona que su aplicación sobre una arquitectura heterogénea, a través de modelos existentes, no halle el resultado que se ambiciona. La computación paralela ha propuesto, como pocas, significativos quiebres en el ámbito de la Ciencia de la Computación, al provocar la reformulación y generación de nuevos conceptos. El desarrollo de nuevos mo...

  9. Sobre la hiperinflación peruana

    Oscar Dancourt; Ivory Yong

    1989-01-01

    El propósito de este artículo es contar una historia que ya ha sido muy bien contada en otras circunstancias: la historia de las hiperinflaciones. La deuda que tenemos con esa literatura económica clásica (Van Walre de Bordes (1924), Keynes (1971), Bresciani-Turroni (1968); Schacht (1927), Graham (1930). Robinson (1976)) no puede contabilizarse ni en una bibliografía, ni en unas cuantas citas. También debemos mucho a la literatura maierrta sobre las hiperinflaciones (especialmente Cagan (1967...

  10. Nota sobre Phelipaea reuteriana Rchb. F. (Orobanchaceae)

    Pujadas-Salvá, Antonio J.; Crespo Villalba, Manuel Benito

    2006-01-01

    Recientemente se ha demostrado que Phelipaea reuteriana Rchb. f. es el nombre prioritario para Orobanche tunetana Beck, habiéndose rescatado aquél en el género Phelipanche Pomel (= Orobanche sect. Trionychon Wallr.). En la presente nota, sobre la base de los datos moleculares accesibles, se discute la conveniencia de separar las distintas secciones de Orobanche en géneros independientes y, por el contrario, se propone la nueva combinación Orobanche reuteriana (Rchb. f.) M.B. Crespo & A. Pujad...

  11. Notas sobre Phelipaea reuteriana Rchb. f. (Orobanchaceae)

    Crespo Villalba, Manuel Benito; Pujadas Salvá, Antonio

    2006-01-01

    Recientemente se ha demostrado que Phelipaea reuteriana Rchb. f. es el nombre prioritario para Orobanche tunetana Beck, habiéndose rescatado aquél en el género Phelipanche Pomel (= Orobanche sect. Trionychon Wallr.). En la presente nota, sobre la base de los datos moleculares accesibles, se discute la conveniencia de separar las distintas secciones de Orobanche en géneros independientes y, por el contrario, se propone la nueva combinación Orobanche reuteriana (Rchb. f.) M.B. Crespo & A. Pujad...

  12. El tullido. Un cuento sobre los cuentos

    Fernández-Urtasun, R. (Rosa)

    2005-01-01

    Este artículo realiza una lectura literaria y simbólica de El tullido, uno de los cuentos de Christian Andersen que pasó desapercibido entre los relatos que se publicaron tras su muerte. El relato del argumento va acompañado de una reflexión sobre los temas que aparecen recogidos en el texto: las tradiciones orales, la belleza del arte, la esperanza, la creación, la importancia de la escritura y de la lectura, la esencia de la literatura.

  13. Notas sobre envidia, equilibrio y optimalidad

    Cristini, Marcela; Chisari, Omar Osvaldo

    1980-01-01

    Demostramos aquí -aún para coeficientes de producción distintos de la unidad- la suficiencia de las características del equilibrio para determinar el efecto aludido sobre la situación de ambos agentes. Damos otra condición suficiente, que no supone necesariamente el equilibrio; generalizamos los resultados a un número mayor de consumidores y deducimos propiedades del óptimo de Pareto, definido como aquella situación en la que no es posible mejorar el nivel de utilidad de un agente sin reducir...

  14. Productos derivados sobre bienes de consumo

    Francisco Venegas Martínez; Salvador Cruz Ake

    2010-01-01

    Este trabajo de investigación desarrolla un modelo de equilibrio general con expectativas racionales en tiempo continuo útil para la determinación de precios de contratos forward , contratos futuros, bonos cupón cero y opciones europeas (de compra y venta) sobre bienes de consumo. Para ello, el modelo considera un individuo representativo en una economía con dos bienes, los cuales son producidos con tecnologías estocásticas. Por último, el modelo propuesto permite examinar estrategias para o...

  15. Observaciones sobre colostomía

    Escobar T., Jaime; Castro, Augusto de; Peñalosa, Federico

    2011-01-01

    Se hace una revisión sobre 133 casos de colostomías hechas en pacientes del Hospital San Juan de Dios de Bogotá en un período de cinco años; el 43.7 por ciento de los casos eran heridas por arma de fuego. La mortalidad global fue de 16.5 por ciento. La colostomía derivativa, en ASA, ha bajado la mortalidad en las heridas de colon en dicho hospital.

  16. Avances sobre bases de datos no convencionales

    Arroyuelo, Jorge; Esquivel, Susana Cecilia; Grosso, Alejandro; Ludueña, Verónica; Reyes, Nora Susana; Chávez, Edgar; Navarro, Gonzalo

    2014-01-01

    En la actualidad han surgido, debido a los avances alcanzados en tecnologías de información y comunicación, aplicaciones no tradicionales sobre bases de datos de todo tipo de datos, valga la redundancia. Éstos pueden ser imágenes, texto libre, secuencias de ADN, audio, video, etc., pueden estar o no estructurados y provenir de diversas fuentes (satélites, telescopios, revistas, fotografías, música, etc.), como también ser de diferentes tamaños, generalmente muy grandes. Por otro lado, las con...

  17. Literatura infantil sobre problemas infantiles: la diabetes

    Lázaro Fernández, Patricia

    2015-01-01

    Debido al creciente número de casos de diabetes infantil que se está dando en la sociedad actual, no es raro encontrarse en las aulas cada vez más casos de esta enfermedad. Por esta razón, he decidido analizar dos libros sobre esta temática, para hacer un acercamiento del material seleccionado a las aulas y poder desarrollar junto con los niños un aprendizaje colectivo y cooperativo. En este trabajo se expone la importancia de la literatura y la literatura infantil como una ...

  18. Algunas reflexiones sobre la supervivencia empresarial

    Sarabia Alzaga, José María

    1995-01-01

    Dos bloques-tópico, bien conocidos, configuran el esquema lógico de las reflexiones que se proponen. El primero de ellos se centra en nuestra realidad global: el entorno; el segundo, en los impactos que éste ha generado en la empresa, exponiendo una síntesis contrastada -y hoy día vigente- sobre cómo las empresas de éxito están consiguiendo sobrevivir. Como conclusión, se sintetizan algunas ideas o lineas generales de actuación que pudieran ayudar a mejorar o reforzar las propias experiencias...

  19. Sentencias Constitucionales sobre la muerte digna

    Serrano, J. M.

    2006-01-01

    La sentencia comentada ha sido considerada como relevante en la discusión sobre el derecho a la vida en relación con la eutanasia. Sin embargo, las peculiaridades del caso qeu le dio origen y la propia argumentación del tribunal la alejan d euna interpretación relevante en torno a los dos tópicos del derecho a la vida y a la dignidad. Por el contrario la sentencia resulta decepcionate en su argumentación más propia. Primero respecto a la propia huelga de hambre que condena sin matices en rela...

  20. Consideraciones sobre de la ética

    Enrique Cantolla Bernal

    2005-01-01

    El presente ensayo muestra como el hombre, a través de la historia, a estado constantemente buscando beneficios para su vida y ha debido cumplir con varias tareas, que con el tiempo han dado origen a costumbres y comportamientos que han llevado a constituir la moral y la ética. Esta última, nos permite definir y determinar los principales fines de la vida del hombre y cuales son los principios y normas que lo rigen. Así, el estudio de la ética nos plantea la interrogante sobre "los fines de l...

  1. Recursos sobre propiedad intelectual en internet

    Sorli Rojo, Ángela; Merlo Vega, José Antonio

    2001-01-01

    El concepto de propiedad intelectual, entendido en su sentido más amplio, englobaría todos los aspectos relacionados con los derechos que se obtienen de una creación, tanto en su forma original, como de sus posibles reproducciones y transformaciones. En este trabajo se recopilan y analizan una serie de fuentes de información accesibles en Internet sobre este tema. No obstante, la idea de propiedad intelectual no coincide plenamente con la de propiedad industrial, que es mucho m...

  2. Efecto de masticar chicle sobre la halitosis

    De Luca Monasterios, Fiorella; Chimenos Küstner, Eduardo; López López, José

    2014-01-01

    Fundamento y objetivo: Este estudio pretende estimar la prevalencia de halitosis oral en una población joven y mostrar el efecto del chicle sobre el aliento. Pacientes y método: Estudio prospectivo de campo descriptivo correlacional, de corte transversal. Se seleccionaron a conveniencia 121 jóvenes, de los que 98 concluyeron el estudio, el cual se realizó en el Hospital Odontológico Universitario-Universidad de Barcelona. El protocolo consistió en: cuestionario, evaluación clínica oral, prueb...

  3. Futuros: estudo de caso sobre futuros cambiais

    Santo, Paula Cristina Rosa da Silva Espírito

    2010-01-01

    Mestrado em Contabilidade A presente dissertação foi realizada com vista à obtenção do grau de mestre em Contabilidade pelo Instituto Superior de Contabilidade e Administração de Lisboa. Para o desenvolvimento desta dissertação foi escolhido o tema “Contratos de Futuros”. Em termos estruturais esta monografia divide-se em duas partes. Na primeira parte faz-se uma exposição sobre o tema os “Futuros”. Na segunda parte é apresentado o trabalho de investigação que foi desenvolvido. Na...

  4. ALGUNAS CONSIDERACIONES SOBRE GUARDA Y CUIDADO

    Antonio A. Salomón Salomón; Yusleidys Arteaga Gónzalez; Beatriz Figueraz González; Diosbel Fuentes Guilarte

    2011-01-01

    Desde comienzos del segundo tercio del pasado siglo, la mayor parte de los ordenamientos jurídicos se ocuparon de reformar el derecho de familia. Las nuevas concepciones sociales sobre la familia estaban fuertemente inspiradas en el principio de igualdad acogido por la Organización de Naciones unidas. La igualdad de los cónyuges y las relaciones de igualdad de los progenitores respecto a los hijos encontró un respaldo jurídico para fundamentar las reformas del derecho de familia en la igualda...

  5. Reflexiones sobre contabilidad privada y contabilidad nacional

    José Arturo Gutiérrez

    1995-01-01

    Se discuten las interrelaciones de la contabilidad privada y la contabilidad nacional, insistiendo en sus condicionantes internos contradictorios en relación con la sobredeterminación de la formación económico-social vigente. En relación con ello se introduce la reflexión sobre la unidad contradictoria entre empresa y capital, esto es, la base técnica frente a su determinante socioeconómico, conflicto que la propia contabilidad privada expresa: al describir el capital aporta necesariamente el...

  6. Puntualizaciones sobre el concepto de latencia

    Bortolazzo, Antonela

    2007-01-01

    El presente escrito revisa un concepto elaborado por Freud, como es la noción de Período de latencia sexual. Antes de hacer explícito el enfoque desde el cual será abordado quisiera mencionar que, lo que a continuación se desarrolla se enmarca en el trabajo de investigación que sobre el concepto de Latencia realiza, desde hace catorce años, la Cátedra de Psicología Evolutiva I, de la cual formo parte. En esta oportunidad me propongo indagar el concepto de latencia en el marco de la teoría ...

  7. Consideraciones criminológicas sobre las bandas juveniles

    Medina, Juanjo, Ralphs, Robert, Aldridge, Judith

    2010-01-01

    Este artículo ofrece una serie de reflexiones originales sobre la definición de las bandas juveniles y resume algunos de los debates claves en el campo de investigación sobre bandas. En particular, se presta especial atención a los estudios sobre la relación entre bandas y delincuencia, las teorías que explican la formación de las bandas y los factores que empujan a los jóvenes a vincularse a las mismas, los estudios sobre respuestas de política criminal a este fenómeno, ...

  8. Más sobre Abalone y algo sobre tuercas: los tetrahexos

    Rupérez, José Antonio; García, Manuel

    2012-01-01

    Comentamos los problemas planteados en anterior artículo sobre jugadas del ABALONE, describiéndolo de nuevo y presentamos el puzle de los Polihexos, fácil de construir y entretenido de resolver; útil para plantear ejercicios de combinatoria y simetrías.

  9. Expression of T cell immunogloblin and mucin domain-containing molecule 3 mRNA and its relationship with asthma%T淋巴细胞免疫球蛋白黏蛋白-3 mRNA表达在支气管哮喘中的作用

    韩锋; 陆小霞; 王莹

    2014-01-01

    Objective To detect the expression of T cell immunogloblin and mucin domain-containing molecule 3 (Tim-3) mRNA in peripheral blood mononuclear cells (PBMC) isolated from asthmatic children and asthmatic murine,and to explore the role of Tim-3 in bronchial asthma.Methods Recruiting 97 cases asthmatic children,47 children with acute asthma exacerbation(acute attack group),50 children with asthma remission (remittent group)and 42 children as the healthy control group.The Tim-3 mRNA expression was measured by using reverse transcription-polymerase chain reaction(RT-PCR) method.The levels of interleukin-6 (IL-6) and transforming growth factor-5 (TGF-β)were determined with enzyme-linked immunosorbent assay (ELISA),and to analyze the correlation between Tim-3 mRNA and the level of IL-6.The asthmatic murine models were randomly divided into 2 groups:normal control group and asthma group.There were 10 mice in each group.PBMC in each group were collected.Expression of Tim-3 mRNA was detected by using real-time PCR.The level of CD4 + IL-17 + and CD4 + CD~ + FoxP3 + which reflected Th17 and regulatory T cells(Treg) expression respectively were detected by using flow cytometry,and the correlation between Tim-3 and Thl7/Treg level was analyzed.Results Expression of Tim-3 mRNA in children with acute asthma exacerbation was significantly higher than those in remission stage and healthy control group (all P < 0.05).The expression of Tim-3 mRNA in children with asthma remission was significantly higher than that in healthy control group (P < 0.05),and the level of IL-6 in children with acute asthma exacerbation was significantly higher than those in remission stage and healthy control group (all P < 0.05).In the murine model of asthma group,the level of Tim-3 mRNA in PBMC was significantly higher than that in normal control group (P < 0.01),and in asthma group CD4 + IL-17 + expression was significantly higher than normal control group but CD4 + CD25 + FoxP3 + was

  10. Synthesis and structure of new framework phosphates Li1/4M7/4(PO4)3(M = Nb, Ta)

    New lithium-niobium and lithium-tantalum phosphates Li1/4M7/4(PO4)3(M = Nb, Ta) are synthesized by the solid-phase method. The compounds prepared are characterized using electron microprobe analysis, X-ray powder diffraction, and IR spectroscopy. The crystal structure of the Li1/4Ta7/4(PO4)3 phosphate is determined from the X-ray powder diffraction data (the Rietveld method) and belongs to the framework type. The framework of the structure consists of TaO6 and LiO6 vertex-shared octahedra and PO4 tetrahedra. The isostructural phosphates Li1/4M7/4(PO4)3 crystallize in the trigonal crystal system (space group R3-barc, Z = 6) and belong to the NaZr2(PO4)3 structure type.

  11. Synthesis, crystal structure, and Moessbauer study of a series of perovskite-like compounds [ACu3](M,Fe)4O12

    A series of cubic perovskite-like compounds with the general formula [ACu3](M,Fe)4O12 is synthesized. The A-sites are occupied by large cations such as Th4+ or rare earths R3+. The B-sites are statistically occupied by Fe3+ cations and by tetravalent M4+ cations such as Mn4+ or Ti4+. The structure of [NdCu3](Ti3Fe)O12 (space group Im3) is refined from room temperature neutron diffraction data. Moessbauer spectroscopy data performed on [NdCu3](Ti3Fe)O12 and on [ThCu3](Mn2Fe2)O12 show that a magnetic order takes place below 14 K for the first compound and below 200 K for the second one. (author)

  12. 3M Petrifilm Staph Express Count plate method for the enumeration of Staphylococcus aureus in selected types of meat, seafood, and poultry: collaborative study.

    McMahon, Wendy A; Aleo, Victoria A; Schultz, Ann M; Horter, Barbara L; Lindberg, Kathryn G

    2003-01-01

    The 3M Petrifilm Staph Express Count plate method was compared with AOAC Official Method 975.55 for the enumeration of Staphylococcus aureus in selected foods. Four foods--cooked, diced chicken; cured ham; smoked salmon; and pepperoni--were analyzed for S. aureus by 12 collaborating laboratories. For each food tested, the collaborators received 8 blind test samples consisting of a control sample, a low inoculation level, a medium inoculation level, and a medium inoculation level with background flora, each in duplicate. The mean log10 counts for the methods were comparable for all 4 foods. The repeatability and reproducibility variances of the 24 h Petrifilm Staph Express Count plate method were similar to those of the 72 h standard method. PMID:14632396

  13. The Effects of 0.3 mA and 0.5 mA Threshold Currents on Axillary Brachial Plexus Block

    Halit Demir

    2011-09-01

    levobupivacaine (0.5% and 200 mg of lidocaine (2% in a total volume of 40 ml was injected around the radial nerve. The duration of postoperative sensory and motor block and the first analgesic requirement were measured. Results; The onset of sensory and motor block of the musculocutaneus (p=0.01 and p=0.004 respectively and the onset of motor block of the median and ulnar nerve (p=0.009 and p=0.02 respectively were significantly shorter in group 1 than in group 2. The duration of postoperative sensory and motor block and the time to first analgesic requirement were significantly longer in group 1 than in group 2 (p=0.0001. Conclusions; The 0.3 mA current is more beneficial than 0.5 mA current in shortening the onset of sensory and motor block, lengthening the postoperative sensory and motor block and the duration of first analgesic requirement.

  14. Charge transfer and orbital reconstruction in the (La2/3Sr1/3MnO3)m/(SrRuO3)n superlattices

    The structural, electronic, and magnetic properties of (La2/3Sr1/3MnO3)m/(SrRuO3)n superlattices have been investigated based on the first principles calculations. An obvious Jahn-Teller distortion, which depends on m, n, appears in MnO6 octahedron in the superlattices. The stretch along c-axis of MnO6 octahedron at the interface lifts the Mn eg orbital degeneracy, with electrons preferring the lower energy 3z2−r2 to the higher energy x2−y2. Benefitting from the charge transfer at the interface, the still occupied x2−y2 orbital can mediate a robust in-plane double exchange interaction. La2/3Sr1/3MnO3 block is ferromagnetic and metallic, even for the superlattice with m = n = 1

  15. Structural and electronic properties of ScnOm (n=1~3, m=1~2n) clusters: Theoretical study using screened hybrid density functional theory

    Yang, Yu; Zhang, Ping; 10.1103/PhysRevB.84.205430

    2011-01-01

    The structural and electronic properties of small scandium oxide clusters ScnOm (n = 1 - 3, m = 1 - 2n) are systematically studied within the screened hybrid density functional theory. It is found that the ground states of these scandium oxide clusters can be obtained by the sequential oxidation of small "core" scandium clusters. The fragmentation analysis demonstrates that the ScO, Sc2O2, Sc2O3, Sc3O3, and Sc3O4 clusters are especially stable. Strong hybridizations between O-2p and Sc-3d orbitals are found to be the most significant character around the Fermi level. In comparison with standard density functional theory calculations, we find that the screened hybrid density functional theory can correct the wrong symmetries and yield more precise description for the localized 3d electronic states of scandium.

  16. Theoretical prediction of structural, elastic and electronic properties of M{sub 5}Si{sub 3} (M = Ti, Zr) compounds

    Chihi, T.; Fatmi, M.; Ghebouli, M.A., E-mail: fatmimessaoud@yahoo.fr [Research Unit on Emerging Materials (RUEM), Setif 1 University (Algeria); Ghebouli, B. [Laboratory for Studying Surfaces and Interfaces of Solids Materials, Department of Physics, Faculty of Sciences, Setif 1 University, Setif (Algeria); Bouhemadou, A. [Laboratory for Developing New Materials and their Characterization, Department of Physics, Faculty of Science, Setif 1 University, Setif (Algeria)

    2015-06-15

    Structural, elastic, electronic and mechanical properties of the M{sub 5}Si{sub 3} (M = Ti, Zr) compounds with (Mn{sub 5}Si{sub 3}) 16H crystal structure have been studied with respect to pressure. Our computational method is based on a pseudo-potential plane-wave (PP-PW) method. The exchange correlation has been treated using the generalized gradient approximation (GGA) in order to work out the densities of states. Ground-state quantities, such as lattice parameter and bulk modulus, have been evaluated, as well as elastic constants and their pressure derivative. Elastic constants and their pressure dependence have been calculated. Also, bulk and shear moduli, Young' modulus and Poisson's ratio for ideal polycrystalline phases have been derived. (author)

  17. Commissioning ShARCS: the Shane Adaptive optics infraRed Camera-Spectrograph for the Lick Observatory 3-m telescope

    McGurk, Rosalie; Gavel, Donald; Kupke, Renate; Peck, Michael; Pfister, Terry; Ward, Jim; Deich, William; Gates, John; Gates, Elinor; Alcott, Barry; Cowley, David; Dillon, Daren; Lanclos, Kyle; Sandford, Dale; Saylor, Mike; Srinath, Srikar; Weiss, Jason; Norton, Andrew

    2014-01-01

    We describe the design and first-light early science performance of the Shane Adaptive optics infraRed Camera-Spectrograph (ShARCS) on Lick Observatory's 3-m Shane telescope. Designed to work with the new ShaneAO adaptive optics system, ShARCS is capable of high-efficiency, diffraction-limited imaging and low-dispersion grism spectroscopy in J, H, and K-bands. ShARCS uses a HAWAII-2RG infrared detector, giving high quantum efficiency (>80%) and Nyquist sampling the diffraction limit in all three wavelength bands. The ShARCS instrument is also equipped for linear polarimetry and is sensitive down to 650 nm to support future visible-light adaptive optics capability. We report on the early science data taken during commissioning.

  18. Yellow phosphors doping with Gd3+, Tb3+ and Lu3+ in MTiO3 (M = Mg and Sr) luminescence properties

    Esra Korkmaz; Nilgun Ozpozan Kalaycioglu; V Emir Kafadar

    2013-11-01

    This paper reports Gd3+, Tb3+ and Lu3+ doped MTiO3 (M = Mg and Sr)-based phosphors which were synthesized by the conventional solid-state reaction method, their crystal structures and luminescence properties were investigated. X-ray diffraction patterns (XRD) showed that phosphors sintered at 1000 °C for 2 h were the pure SrTiO3 and MgTiO3 phases. The optimization of reaction conditions was carried out by thermogravimetry and differential thermal analysis (DTA/TG) methods. Surface and elemental analyses were performed by using SEM instrument. The excitation and emission spectra were recorded by a photoluminescence spectrophotometer (PL). The thermoluminescence (TL) properties of MgTiO3:RE (RE = Gd3+, Tb3+, Lu3+) and SrTiO3:RE (RE = Gd3+, Tb3+, Lu3+) were investigated.

  19. Debate sobre estudios postcoloniales y subalternos

    David Morris

    2001-01-01

    Full Text Available A partir de los comentarios a la reseña elaborada por Ian S. Mclean sobre el libro: Cuerpos incas y el cuerpo de Cristo. El Corpus Christi en Cuzco colonial, Perú, escrito por Carolyn Dean, surge un debate sobre los Estudios Postcoloniales y Subalternos, que se desarrolló entre el 12 de agosto y el 3 de septiembre de 2001, a través de la lista de correo electrónico de H-Latam, grupo de discusión dedicado a la historia latinoamericana. En él participaron destacados especialistas en el tema, quienes analizaron, entre otras cuestiones, el uso de la jerga y las formas de escritura, la novedad de sus planteamientos, sus influencias filosóficas y epistemológicas, su pretensión de captar el punto de vista de los vencidos y subordinados, la pertinencia de unas ideas originalmente desarrolladas para el estudio del colonialismo inglés y luego aplicadas al colonialismo español en América Latina.

  20. El problema de Steklov sobre el cono

    Óscar Andrés Montaño Carreño

    2012-12-01

    Full Text Available Sea (Mn, g un cono de altura 0 ≤ xn+1 ≤ 1 en R n+1, dotado con una métrica rotacionalmente invariante 2ds2 + f 2 (sdw2 , donde dw2 representa la métrica estándar sobre S n−1 , la esfera unitaria (n − 1-dimensional. Supongamos que Ric(g ≥ 0. En este artículo demostramos que si h > 0 es la curvatura media sobre ∂M y ν1 es el primer valor propio del problema de Steklov, entonces ν1 ≥ h. Abstract. Let (Mn, g be a cone of height 0 ≤ xn+1 ≤ 1 in R n+1, endowed with a rotationally invariant metric 2ds2 + f 2 (sdw2 , where dw2 represents the standard metric on S n−1 , the (n − 1-dimensional unit sphere. Assume Ric(g ≥ 0. In this paper we prove that if h > 0 is the mean curvature on ∂M and ν1 is the first eigenvalue of the Steklov problem, then ν1 ≥ h.

  1. Sobre la aplicabilidad del Principialismo Norteamericano

    Pablo Requena Meana

    2008-01-01

    Full Text Available La propuesta de cuatro principios prima facie que Beauchamp y Childress han sugerido para la bioética (el principialismo se ha impuesto como uno de los paradigmas más seguidos, no sólo en los Estados Unidos, sino también en muchas otras partes del mundo. Este modelo ha sido criticado desde distintos puntos de vista, sobre todo en los últimos quince años. Una de las mayores objeciones que se hace al principialismo es la dificultad de aplicar la propuesta a los casos de la vida real. El problema de fondo está en que, a la falta de jerarquización de principios, se suma la ausencia casi total de indicaciones antropológicas sobre los bienes morales que deberían proteger dichos principios. El resultado es que ante un dilema ético se pueden sacar conclusiones opuestas, según se utilice un principio u otro. Los autores proponen como instrumentos para superar estos conflictos la especificación y ponderación de los principios y reglas morales; pero, en bastantes casos, no resultan suficientes.

  2. Structure, phase transitions and molecular dynamics of [C(NH{sub 2}){sub 3}]{sub 3}[M{sub 2}I{sub 9}], M = Sb, Bi

    Szklarz, P; Jakubas, R; Bator, G [Faculty of Chemistry, University of Wroclaw, Joliot-Curie 14, 50-383 Wroclaw (Poland); Pietraszko, A [Institute of Low Temperature and Structure Research, PAS, Okolna 2, 50-950 Wroclaw 2, PO Box 937 (Poland); Zielinski, P; Galazka, M [The H Niewodniczanski Institute of Nuclear Physics PAS, Radzikowskiego 152, PL-31-342 Krakow (Poland)], E-mail: pszklarz@eto.wchuwr.pl

    2008-06-25

    Two novel guanidinium iodoantimonate(III) and iodobismuthate(III) crystals, [C(NH{sub 2}){sub 3}]{sub 3}[Sb{sub 2}I{sub 9}] and [C(NH{sub 2}){sub 3}]{sub 3}[Bi{sub 2}I{sub 9}], have been synthesized and their structures have been determined by means of single-crystal x-ray diffraction studies at three temperatures (293, 348 and 362 K). Both compounds appeared to be isomorphous in corresponding phases. The crystal structure of the title compounds is composed of discrete M{sub 2}I{sub 9}{sup 3-} (M = Sb, Bi) anions and C(NH{sub 2}){sup 3+} guanidinium cations. A non-equivalence of two guanidinium cations has been found. Both guanidinium analogs exhibit a rich sequence of phase transitions. In Gu{sub 3}Sb{sub 2}I{sub 9}, three solid-solid structural phase transformations of the first order type are detected at 119/121, 341/344 and 355/362 K (on cooling/heating) by the DSC and dilatometric techniques. Gu{sub 3}Bi{sub 2}I{sub 9} displays four first order phase transitions: 179/185, 202/215, 287/291 and 358/368 K. The low temperature phases appear to have ferroic (ferroelastic) properties. The prototypic paraelastic phase for both compounds belongs to hexagonal symmetry (space group P6{sub 3}/mmc). The dielectric response has been measured in a wide frequency region (100 Hz-1 MHz), but no dielectric dispersion has been detected. Possible mechanisms of the phase transitions in Gu{sub 3}M{sub 2}I{sub 9} (M = Sb, Bi) are discussed on the basis of the presented results.

  3. Divergence of Pumilio/fem-3 mRNA Binding Factor (PUF) Protein Specificity through Variations in an RNA-binding Pocket*

    Qiu, Chen; Kershner, Aaron; Wang, Yeming; Holley, Cynthia P.; Wilinski, Daniel; Keles, Sunduz; Kimble, Judith; Wickens, Marvin; Hall, Traci M. Tanaka

    2012-01-01

    mRNA control networks depend on recognition of specific RNA sequences. Pumilio-fem-3 mRNA binding factor (PUF) RNA-binding proteins achieve that specificity through variations on a conserved scaffold. Saccharomyces cerevisiae Puf3p achieves specificity through an additional binding pocket for a cytosine base upstream of the core RNA recognition site. Here we demonstrate that this chemically simple adaptation is prevalent and contributes to the diversity of RNA specificities among PUF proteins. Bioinformatics analysis shows that mRNAs associated with Caenorhabditis elegans fem-3 mRNA binding factor (FBF)-2 in vivo contain an upstream cytosine required for biological regulation. Crystal structures of FBF-2 and C. elegans PUF-6 reveal binding pockets structurally similar to that of Puf3p, whereas sequence alignments predict a pocket in PUF-11. For Puf3p, FBF-2, PUF-6, and PUF-11, the upstream pockets and a cytosine are required for maximal binding to RNA, but the quantitative impact on binding affinity varies. Furthermore, the position of the upstream cytosine relative to the core PUF recognition site can differ, which in the case of FBF-2 originally masked the identification of this consensus sequence feature. Importantly, other PUF proteins lack the pocket and so do not discriminate upstream bases. A structure-based alignment reveals that these proteins lack key residues that would contact the cytosine, and in some instances, they also present amino acid side chains that interfere with binding. Loss of the pocket requires only substitution of one serine, as appears to have occurred during the evolution of certain fungal species. PMID:22205700

  4. Divergence of Pumilio/fem-3 mRNA binding factor (PUF) protein specificity through variations in an RNA-binding pocket.

    Qiu, Chen; Kershner, Aaron; Wang, Yeming; Holley, Cynthia P; Wilinski, Daniel; Keles, Sunduz; Kimble, Judith; Wickens, Marvin; Hall, Traci M Tanaka

    2012-02-24

    mRNA control networks depend on recognition of specific RNA sequences. Pumilio-fem-3 mRNA binding factor (PUF) RNA-binding proteins achieve that specificity through variations on a conserved scaffold. Saccharomyces cerevisiae Puf3p achieves specificity through an additional binding pocket for a cytosine base upstream of the core RNA recognition site. Here we demonstrate that this chemically simple adaptation is prevalent and contributes to the diversity of RNA specificities among PUF proteins. Bioinformatics analysis shows that mRNAs associated with Caenorhabditis elegans fem-3 mRNA binding factor (FBF)-2 in vivo contain an upstream cytosine required for biological regulation. Crystal structures of FBF-2 and C. elegans PUF-6 reveal binding pockets structurally similar to that of Puf3p, whereas sequence alignments predict a pocket in PUF-11. For Puf3p, FBF-2, PUF-6, and PUF-11, the upstream pockets and a cytosine are required for maximal binding to RNA, but the quantitative impact on binding affinity varies. Furthermore, the position of the upstream cytosine relative to the core PUF recognition site can differ, which in the case of FBF-2 originally masked the identification of this consensus sequence feature. Importantly, other PUF proteins lack the pocket and so do not discriminate upstream bases. A structure-based alignment reveals that these proteins lack key residues that would contact the cytosine, and in some instances, they also present amino acid side chains that interfere with binding. Loss of the pocket requires only substitution of one serine, as appears to have occurred during the evolution of certain fungal species. PMID:22205700

  5. CAST3M modelling of a spent fuel assembly bending during a handling accident Rod failure risk evaluation from the experimental results of spent fuel rod bending test

    The fuel handling operating rules exclude any accidental risk. However in the framework of the PRECCI R and D project, the bending of a spent fuel assembly resulting from its locking during a translation displacement is taken into account. This enabled us to develop an approach based on experiments and calculations that allows us to simulate the behaviour of an assembly under such loading. This study was carried out in CEA laboratories with the funding and the technical support of EDF. A three points bending test on a spent fuel rod segment was performed at the Laboratory for Mechanical Behaviour of Irradiated Materials (LCMI). From the experimental strength-displacement curve, a maximum failure strain, a maximum failure curvature and an equivalent constitutive equation were determined. CAST3M modelling of the fuel rod taking into account the elasto-plastic behaviour of the clad and the cracking of the UO2 fuel pellets was verified by the experimental results. Consequently, the identification of the respective contributions of the clad and of the pellets to the rod global behaviour was made possible. A two dimensional assembly with beam elements was modelled with CAST3M. The properties of the beams modelling the different parts of the assembly (top and bottom nozzle, grids) were chosen and adjusted according to their materials (zirconium alloys, steel) in order to obtain stiffness, tensile and shear behaviour, sliding and holding functions close to the experimental ones. Assembly bending calculations were performed. In order to obtain a rod integrity estimator, their maximum calculated strains and curvatures as a function of the bending angles can be compared to the failure experimental ones. (authors)

  6. Influences of Inhaled Corticosteroids on CD4+ CD25+ Regulatory T Cells and Foxp3 mRNA of Asthmatic Patients%吸入激素对哮喘患者外周血CD4+CD25+调节性T细胞水平及Foxp3mRNA表达的影响

    薛克营; 柯明耀; 姜燕; 陈玲玲; 吴雪梅; 谢红旗

    2011-01-01

    目的 观察支气管哮喘患者外周血CD4 CD25调节性T细胞(CD4CD25Treg)、Foxp3 mRNA的水平及吸入糖皮质激素对其的影响.方法 流式细胞仪检测非急性发作期哮喘患者吸入激素前、后和健康志愿者(正常对照组)外周血单个核细胞(PBMCs)中CD4CD25Treg的比例,RT-PCR检测Foxp3 mRNA表达变化,肺功能仪检测第1秒用力呼气容积占预计值百分比(FEV.%pred)和呼气峰流量(PEF).结果 哮喘组治疗前CD4CD25Treg水平及Foxp3 mRNA的表达显著低于正常对照组(PCD25Treg水平及Foxp3 mRNA的表达较治疗前显著升高(P%pred、PEF显著低于正常对照组(P%pred、PEF较治疗前显著增加(PCD25Treg数量减少,功能下降,参与了哮喘的发病过程;吸入激素可以上调哮喘患者外周血CD4CD25Treg及Foxp3 mRNA的水平,改善哮喘患者的肺功能.%Objective To investigate the percentage of CD4+ CD25+ Treg cells and expression of Foxp3 mRNA in asthmatic patients and the impacts of inhaled steroids.Methods The percentages of CD4 + CID25 + Treg cells was assayed by flow cytometry and the expression of Foxp3 mRNA was detected by RT-PCR in peripheral blood mononuclear cells from the patients with chronic persistent asthma before and after steroids inhalation in comparison with healthy control.The forced expired volum in one second/predicted value( FEV1 % pred)and peak expired flow (PEF) were measured by spirometry.Results The level of CD4 + CD25 + Treg cells and the expression of Foxp3 mRNA were lower in asthmatics before steroids treatment than those in control ( P < 0.05 ) which were increased significantly after steroids treatment ( P < 0.05 ).FEV1 % pred and PEF were declined significantly than those in control but improved markedly after treatment (P < 0.05 ).Conclusions The insufficiency of amount and function of immue-suppressive CD4 + CD25 + Treg cells may play a role in the pathogenesis of asthma.Inhaled steroids can improve the lung function of asthmatics

  7. Expression and Significance of RORC and Foxp3 mRNA in Peripheral Blood Mononuclear Cells (PBMC) in Children with Bronchial Asthma%哮喘患儿外周血RORC和Foxp3mRNA表达水平的变化及其意义

    黄雪琼; 檀卫平; 麦贤弟; 吴葆菁; 蓝丹

    2012-01-01

    [Objective] To investigate the mRNA expression and significance of RORC (the transcription factor of Thl7 cells) and Foxp3 (the transcription factor of Treg cells) in PBMC in children with bronchial asthma. [Methods] To detect the mRNA expressions of RORC and Foxp3 in PBMC by quantitative real-time PCR in 40 asthmatic children, including 20 children of acute attack group (age 8.5 ±2.3) , 20 children of remission group (age 9.2 ±1.8) and 10 children of healthy control (age 8.0 ± 1.6). To analyze the relationship between the RORC and Foxp3 mRNA expressions and the FEV1 of pulmonary function in asthmatic children. [Results] It was showed that RORC mRNA expressions in asthmatic children was higher in attack stage than in remission stage and in control group (5.41 ± 0.12 vs 3.33 ± 0.27 vs 3.78 ±0.13, P 0.05). The ratio of RORC/Foxp3 mRNA in PBMCs of asthmatic children in attack stage was significantly higher than those in remission stage and healthy controls (1.68 ± 0.09 vs 0.76 ± 0.06 vs 0.92 ± 0.04, P < 0.01). Pearson correlation analysis revealed that RORC mRNA was negatively correlated with FEV,, but Foxp3 mRNA was positively correlated with FEV,(r = -0.58 and 0.52, P < 0.01). [Conclusions] The imbalance of RORC/Foxp3 mRNA expression exists in asthmatic children, suggesting a potential role forThl7/Treg imbalance in the pathogenesis and reduction of lung function in asthmatic children.%[目的]研究淋巴细胞亚群Th17与Treg上游调控基因维甲酸相关孤儿核受体(RORC)、叉状头转录因子P3( Foxp3) mRNA在支气管哮喘患儿外周血单个核细胞中的表达变化,并探讨其临床意义.[方法]采用荧光实时定量PCR技术分别检测20例哮喘发作期(年龄8.5±2.3)和20例哮喘缓解期(年龄9.2±1.8)外周血单个核细胞的RORC和Foxp3mRNA表达水平,并与10例健康对照组(年龄8.0±1.6)进行比较.并将哮喘患儿RORC和Foxp3 mRNA表达水平与其同期肺功能第一秒用力呼气容积(FEV1)进行相关

  8. Hábitos de consumo sobre la cerveza

    Velasco Matilla, Débora

    2015-01-01

    Estudio de los hábitos de consumo de cerveza en un pueblo determinado situado en la provincia de Segovia, Cantalejo. Contiene un resumen sobre la historia de la cerveza y su tipología y un estudio de mercado sobre la cerveza partiendo de una encuesta.

  9. Violência sobre Crianças

    Sacadura, Catarina Brito; Aragão, Maria José

    2014-01-01

    Trata-se de um estudo de revisão sobre a violência exercida sobre crianças, os agentes da violência, os sujeitos da violência, os factores de risco, as consequências na idade adulta e a recidividade de violência sexual.

  10. 新型材料3M Ketac Molar超硬玻璃离子与银汞合金充填后牙窝洞的对比%Comparative study on filling dental cavities with new material 3M Ketac Molar ultrahard glass ionomer cements and silver amalgams

    熊轶

    2009-01-01

    背景:近年来,传统的银汞合金充填修复的缺点已日益显现.寻找其替代产品是目前研究的热点,而新型材料3M Ketac Molar 超硬玻璃离子充填修复的报道尚不多见.目的:比较3M Ketac Molar超硬玻璃离子与银汞合金充填后牙窝洞的临床效果.设计、时间及地点:回顾性分析,对照观察,于2002-02/2006-04在南昌市第九医院口腔科完成.对象:选择南昌市第九医院口腔科门诊就诊的后牙龋病患者187例307颗牙,平均年龄45岁.方法:用3M Ketac Molar后牙超硬玻璃离子填162颗后牙窝洞,银汞合金充填145颗后牙窝洞,连续观察1,2年,评价其临床效果,以充填材料完好,边缘密合,无继发龋、无磨损者为治疗成功.主要观察指标:两种材料修复后牙窝洞1,2年临床疗效.结果:3M Ketac Molar后牙超硬玻璃离子和银汞合金充填1年复查,成功率分别为96.30%,91.03%;2年复查,成功率分别为91.36%,90.34%.两组疗效差异无显著性意义(P>0.05).结论:3M Ketac Molar后牙超硬玻璃离子既能修复缺损牙面,而且改善美观,防龋,是替代银汞合金的较好材料.

  11. 支气管哮喘患者外周血CD4+ CD25+调节性T细胞水平及Foxp3 mRNA表达的分析%CD4+ CD25+ regulatory T cells and expressions of forkhead/winged helix transcription factor ( Foxp 3 ) mRNA in peripheral blood of patients with asthma

    薛克营; 周咏明; 熊盛道; 熊维宁

    2006-01-01

    目的 观察支气管哮喘(哮喘)患者外周血单个核细胞(PBMCs)中CD4+ CD25+调节性T细胞(Treg)水平及叉状头/翅膀状螺旋转录因子(Foxp3)mRNA表达的变化,探讨CD4+ CD25+ Treg在哮喘发病中的作用.方法采用流式细胞仪检测78例哮喘患者(急性发作期组30例,慢性持续期组25例,缓解期组23例)和29例健康志愿者(正常对照组)PBMCs中CD4+ CD25+ Treg的比例;反转录-聚合酶链反应(RT-PCR)检测PBMCs中Foxp3 mRNA的表达.结果 急性发作期组和慢性持续期组PBMCs中CD4+ CD25+ Treg的比例及Foxp3 mRNA的表达明显低于缓解期组和正常对照组(P<0.05);缓解期组CD4+ CD25+ Treg的比例及Foxp3 mRNA的表达虽亦低于正常对照组,但差异无统计学意义(P>0.05);急性发作期组CD4+ CD25+ Treg的比例及Foxp3 mRNA的表达低于慢性持续期组(P<0.05).结论 哮喘患者外周血中具有免疫抑制活性的CD4+ CD25+ Treg数量减少,功能下降,可能参与哮喘的发生和发展.

  12. The ICRP Proposed Maximum Public Dose Constraints of o.3 mSv/y: a Major Issue for the Nuclear Industry

    The International Commission on Radiological Protection (ICRP) is currently developing a new set of Recommendations on Radiological Protection. A value of 0.3mSv/y for the maximum public dose constraint has been discussed by ICRP. This value represents a major concern for the nuclear industry at large. The primary issue arises from the lack of any new scientific evidence on public health effects from ionising radiation to support, in practice, the proposed reduction by about a factor of 3 (from 1 to 0.3 mSv/y) of the upper bound value for public dose impact from a nuclear activity or site. Such a change would create a de facto limit on public exposure from specific sources at a dose level of about one tenth of average natural background and an even smaller fraction of the typical range of background exposures and exposures from medical sources. This cannot be justified on public health grounds. The WNA supports ICRP's renewed intention, as expressed at the NEA-ICRP Stakeholder Forum in Lanzarote (April 2003), to retain the concept of a public dose limit at 1 mSv/y. We strongly believe that the current system comprising of the dose limit and the ALARA Principle provides the necessary flexibility and tools for regulators to address all situations in all countries. The WNA consider that the question of setting an upper bound dose constraint (below 1 mSv/y) at the country/site specific level is best left for discussion and agreement between the local stakeholders rather than at an international level. When considering the potential practical implications of a maximum dose constraint, it is important to look beyond the very low off-site dose impacts (on the public) resulting from annual routine radioactive discharges of nuclear industrial sites. There are many off-site and on-site practical situations, related to public exposures (both workers and the public) and worker classification as well as activities such transportation, decommissioning and site remediation, for

  13. Argentina neodesarrollista : Debates sobre el modelo

    Féliz, Mariano

    2015-01-01

    En este libro desarrollamos estudios diversos sobre la economía argentina; las políticas públicas y la estructura social; el proyecto de desarrollo en el país y la región; y la dinámica del capitalismo a escala global. En todos los casos, el objetivo de los textos es analítico y pedagógico a la vez. Pretenden aportar a la comprensión de los diversos problemas, presentando elementos de una propuesta superadora partiendo de la crítica de la economía dominante y desde una lectura que se nutra de...

  14. Algunas observaciones sobre el mundo actual

    Tello, Ángel Pablo

    1993-01-01

    El artículo expone las nuevas condiciones políticas creadas en el mundo a partir de la caída del Muro de Brelín y la disolución de la Unión Soviética. Desde allí, el autor intenta reflexionar sobre las líneas de acción que emergen en el planeta como consecuencia de ello y de la ausencia de referencias globales que se observaron durante décadas. En particular, el ascenso de los nacionalismos que no sólo es un fenómeno que afecta a los países en desarrollo, sino también a las potencias industri...

  15. Sobre a moralidade do direito em Kant

    Joãosinho Beckenkamp

    2009-07-01

    Full Text Available http://dx.doi.org/10.5007/1677-2954.2009v8n1p63Na atual literatura sobre a fi losofi a prática de Kant há uma tendência a negligenciar a distinção feita na Metaphysik der Sitten entre direito (Jus e ética (Ethica, a ponto de ser a doutrina do direito de Kant vista como uma mera aplicação do imperativo categórico. Este artigo procura mostrar que Kant apresenta em sua doutrina do direito uma série de argumentos que logram estabelecer o direito de modo inteiramente independente da ética.

  16. NOTAS SOBRE A LÓGICA ESTOICA

    Valter Duarte Moreira Júnior

    2014-02-01

    Full Text Available Diante do grande desenvolvimento da Lógica e do cálculo proposicional no século XX, estudiosos do assunto em todo o mundo se concentraram em um rigoroso estudo dessa disciplina e sua história. Nesse processo, o eminente lógico polonês Jan Lukaziewicz descobriu em sua pesquisa sobre história da lógica a Lógica Estoica, que, já em III a. C., havia antecipado diversos métodos e conceitos da Lógica Moderna. Nossa intenção neste artigo é fazer um breve esboço da lógica desenvolvida pelos Estoicos.

  17. Apuntes sobre el Cultivo del Cacao

    Ochoa Horacio

    1940-03-01

    Full Text Available Por muchos años permaneció el cultivo del cacao en nuestro país, en un deplorable atraso técnico; el agricultor a duras penas si tenía conocimientos generales de su explotación y, de una industria que tuvo su auge debido a la extensividad de las plantaciones, hoy sólo resta una reducida porción de ella. ¿Qué factores operaron esa tan notoria reducción hasta el punto de que exportadores en otros tiempos nos convertimos en importadores obligados de ese producto? Hay muchas razones de orden técnico y de orden económico. Los cacaotaleros obtenían halagadoras retribuciones cuando el jornal consistía en la alimentación que se le daba a la peonada y cuando, generoso, añadía una sobretasa en dinero. Bajo ese sistema de explotación, el descuadre que pudiera ocasionar tanto las enfermedades criptogámicas como los plagas, no era suficiente como para provocar el pesimismo en el hacendado y por tanto inducirlo al abandono de la plantación. A medida que las condiciones sociales del campesino se fueron modificando y su standard de vida aumentaba, cambió fundamentalmente el mecanismo de la industria Se observó entonces que los árboles morían y que era pobre la producción; que lo que en tiempos pasados fuera un negocio lucrativo, se les había convertido en una actividad improductiva y, para controlar estos fenómenos que se generalizaban en todas las zonas cacaotaleras, opusieron la ignorancia, el rutinarismo y la desidia. Lentamente se han ido modificando los conceptos antiguos sobre el trabajo cultural y los cuidados que con relación a las enfermedades y plagas requiere este delicado cultivo; la rutina está echando paso atrás y las experiencias científicas que procuran la prosperidad del plantío, se ponen en práctica en algunas zonas . Esto da esperanza para la reconstitución de la industria cacaotalera en nuestro país, que cuenta con inmensas regiones de óptima calidad para hacerla florecer sobre bases nuevas, con

  18. Sobre el Boletín

    Andrés Arias

    2014-03-01

    Full Text Available En la página de Internet de la Biblioteca Luis Ángel Arango se indica que una de la funciones principales del Boletín es la de reseñar la novedades bibliográfica que van apareciendo en el país. "Novedades": de lo nuevo, tanto en las publicaciones como en las reseñas. Es decir, si lo que asegura la página de la Biblioteca es cierto, quien se acerca al Boletín debe encontrarse con comentarios recientes sobre libros recientes. Con guía que le ayuden a elegir entre las mil ofertas que hay en el mercado bibliográfico. Pero bien sabemos que este objetivo no se cumple.

  19. NOTAS SOBRE A LÓGICA ESTOICA

    Valter Duarte Moreira Júnior

    2014-01-01

    Diante do grande desenvolvimento da Lógica e do cálculo proposicional no século XX, estudiosos do assunto em todo o mundo se concentraram em um rigoroso estudo dessa disciplina e sua história. Nesse processo, o eminente lógico polonês Jan Lukaziewicz descobriu em sua pesquisa sobre história da lógica a Lógica Estoica, que, já em III a. C., havia antecipado diversos métodos e conceitos da Lógica Moderna. Nossa intenção neste artigo é fazer um breve esboço da lógica desenvolvida pelos Estoicos....

  20. Magnetic properties of BaTiO3 and BaTi1−xMxO3 (M=Co, Fe) nanocrystals by hydrothermal method

    BaTiO3 and BaTi1−xMxO3 (M=Co, Fe) nanocrystals were prepared by hydrothermal method. X-ray diffraction analysis indicated that all of the samples were of single-phase with tetragonal perovskite structure. The BaTiO3 prepared exhibited weak ferromagnetism rather than diamagnetism, probably due to the oxygen vacancies at the surface. Paramagnetism was observed for all BaTi1−xCoxO3 samples with 0.05≤x≤0.25. The Curie-Weiss fit revealed the paramagnetic moment per Co ion were 4.09 μB, 4.12 μB, and 4.36 μB for x=0.15, 0.20, and 0.25 respectively. Room temperature hysteresis loops of the Fe-doped BaTiO3 samples were observed at the doping level x between 0.2 and 0.5. The saturation magnetization firstly increased with increasing Fe content, but gradually decreased. The divergence was observed in the temperature dependence of the field cooling (FC) and zero-FC (ZFC) magnetization curves, indicating a spin-glass behavior arising from micromagnetic state, i.e. the mixing of ferromagnetic, and antiferromagnetic phases. The observed ferromagnetism may originate from the coupling between the secondary-nearest Fe ions and the antiferromagnetism may be due to the coupling between the nearest Fe ions. The ferromagnetic coupling competes with the antiferromagnetic coupling. Therefore, the ferromagnetic properties are predominant when the Fe doping level are at a certain range. - Highlights: • We prepare BaTiO3 and BaTi1−xMxO3 (M=Co, Fe) by the hydrothermal method. • BaTiO3 nanocrystals by hydrothermal method exhibit weak ferromagnetism. • BaTi1−xCoxO3 (0.05≤x≤0.25) nanocrystals exhibit paramagnetism. • BaTi1−xFexO3 (0.10≤x≤0.50) nanocrystals exhibit ferromagnetism

  1. Tim-3 mRNA Expression in Peripheral Blood Mononuclear Cells and Its Relationship with CD4+CD25+ Regulatory T Cells from Asthmatic Children%哮喘儿童外周血单个核细胞Tim-3mRNA的表达及其与CD4+CD25+调节性T细胞的关系

    陆小霞

    2011-01-01

    目的 观察哮喘患儿外周血单个核细胞(PBMC)中Tim-3 mRNA的表达及其与CD4+CD25+调节性T细胞(Treg)的关系,探讨Tim-3在哮喘发生发展中的作用.方法 收集哮喘门诊或住院患儿73例,其中哮喘缓解期38例(缓解组),轻至中度急性发作期35例(发作组).利用RT-PCR检测哮喘患儿PBMC中Tim-3 mRNA的表达并做半定量分析,流式细胞术检测PBMC中的CD4+CD25+ Treg的水平(CD4+CD25+ Treg占CD4+T细胞的百分比).利用酶联免疫吸附试验(ELISA)检测血浆中白细胞介素6(IL-6)、转化生长因子β(TGF-β)的水平,并分析Tim-3 mRNA与CD4+CD25+ Treg、IL-6水平的相关性.结果 哮喘发作组PBMC中Tim-3 mRNA吸光度值为(0.86±0.17),与缓解组(0.39±0.11)和正常对照组(0.06±0.03)比较,差异具有统计学意义(均P<0.05),并且缓解组与正常对照组比较差异亦具有统计学意义(P<0.05).哮喘发作组外周血CD4+CD25+ Treg百分率为(8.35±1.67)%,与缓解组[(10.21±2.04)%]和正常对照组[(12.43±2.58)%]比较,差异均具有统计学意义(P<0.05),并且缓解组与正常对照组比较差异亦具有统计学意义(P<0.05);哮喘发作组血浆中IL-6水平为(78.35±14.59)pg/mL,与缓解组[(36.48±9.18)pg/mL]和正常对照组[(10.24±3.57)pg/mL]比较,差异均具有统计学意义(P<0.05),缓解组与正常对照组比较差异亦有统计学意义(P<0.05).3组血浆中TGF-β水平没有明显差异;哮喘发作组和缓解组PBMC中Tim-3 mRNA的表达水平与CD4+CD25+ Treg百分率均呈负相关(r=-0.81,-0.79,均P<0.05),与IL-6的水平呈正相关(r=0.87,0.83,均P<0.01).结论 哮喘患儿PBMC中Tim-3 mRNA表达增高参与哮喘的发生与发展,其机制可能与升高血浆IL-6,抑制CD4+CD25+ Treg的生成有关.%Objective To detect the expression of T cell immunoglobulin mucin 3 ( Tim-3)mRNA in pcripheral blood mono nuclear cells(PBMC)isolated from asthmatic children and analyze its rclationship with CD4+ CD25+ rcgulatory T cells

  2. BaMO3 (M=Zr, Hf, Sn) material dependence of Tc reduction in BaMO3-doped SmBa2Cu3Oy, films

    For the improvement of superconducting properties of BaMO3 (M=Zr, Sn, HQ-doped REBa2Cu3Oy films, we focused on the Tc reduction caused by lattice misfit between BaMO3 and REBa2Cu3Oy. We compared the influence on the Tc reduction of BaZrO3, BaSnO3 and BaHfO3-doped SmBa2Cu3Or (SmBCO) films with various BMO contents. From the correlation between configuration of nanorods and c-axis expansion, it was suggested that the lattice strain working on the SmBCO matrix became stronger in the order of BaHfO3, BaZrO3 and BaSnO3. Therefore, the combination of SmBCO and BaHfO3 is better regarding the suppression of the Tc reduction compared with other combinations of SmBCO and BaMO3.

  3. Antiferromagnetic spin glass-like behavior in sintered multiferroic Aurivillius Bim+1Ti3Fem-3O3m+3 compounds

    Jartych, E.; Pikula, T.; Mazurek, M.; Lisinska-Czekaj, A.; Czekaj, D.; Gaska, K.; Przewoznik, J.; Kapusta, C.; Surowiec, Z.

    2013-09-01

    The structure, hyperfine interactions and magnetic properties of the series of multiferroic Bim+1Ti3Fem-3O3m+3 Aurivillius compounds with m=4-8 were studied using X-ray diffraction, 57Fe Mössbauer spectroscopy and vibrating sample magnetometry. Samples were prepared by the conventional solid-state sintering method. Bulk magnetic measurements showed that for m=4 the compound is paramagnetic down to 2 K while in the compound with m=5 the antiferromagnetic type transition was observed at 11 K. In the case of compounds with m=6-8 much more complex magnetic behavior was found. For these compounds a gradual spin freezing and antiferromagnetic spin glass-like ordering were observed on decreasing temperature. The temperature of spin glass freezing was determined as 260, 280 and 350 K for m=6, 7 and 8, respectively. Room-temperature Mössbauer spectra of all the compounds studied confirm their paramagnetic state. However, liquid nitrogen and liquid helium temperature measurements reveal magnetic ordering with a residual paramagnetic phase contribution for the compounds with m=5-8.

  4. Selective stripping of uranium from 0.3 M D2EHPA + 0.075 M TOPO/kerosene in the second extraction cycle

    Selective stripping of uranium and iron, from 0.3 M D2EHPA + 0.075 M TOPO/kerosene containing 0.0252 M uranium and 0.0064 M iron was investigated using alkaline and acidic media. It was found that, uranium yield increased, when the alkaline stripping agent concentration was increased, and the stripping yield followed the following order: Na2CO3 > (NH4)2 CO3 > NH4 HCO3. However, the selectivity for uranium against iron followed the reverse order: NH4 HCO3 > (NH4)2 CO3 > Na2CO3. Moreover temperature in the range of (25 - 55 Centigrade) was found to have a positive effect on both uranium and iron stripping. Stripping by perchloride acid and nitric acid was not efficient. Hydrochloric and sulfuric acid showed a week stripping yield which increased as the acids concentrations were increased. Stripping by phosphoric acid was found to be efficient. Moreover, the selectivity of stripping by 2 M H3PO4 was high for iron as opposite to uranium. Therefore it was found advantageous to carry out stripping in two stages. The first stage would by 2 M H3PO4 to strip the iron and the second stage using one of the alkaline media mentioned previously to strip uranium completely. (authors)

  5. Rapid identification of a novel complex I MT-ND3 m.10134C>A mutation in a Leigh syndrome patient.

    David K Miller

    Full Text Available Leigh syndrome (LS is a rare progressive multi-system neurodegenerative disorder, the genetics of which is frequently difficult to resolve. Rapid determination of the genetic etiology of LS in a 5-year-old girl facilitated inclusion in Edison Pharmaceutical's phase 2B clinical trial of EPI-743. SNP-arrays and high-coverage whole exome sequencing were performed on the proband, both parents and three unaffected siblings. Subsequent multi-tissue targeted high-depth mitochondrial sequencing was performed using custom long-range PCR amplicons. Tissue-specific mutant load was also assessed by qPCR. Complex I was interrogated by spectrophotometric enzyme assays and Western Blot. No putatively causal mutations were identified in nuclear-encoded genes. Analysis of low-coverage off-target mitochondrial reads revealed a previously unreported mitochondrial mutation in the proband in MT-ND3 (m.10134C>A, p.Q26K, a Complex I mitochondrial gene previously associated with LS. Targeted investigations demonstrated that this mutation was 1% heteroplasmic in the mother's blood and homoplasmic in the proband's blood, fibroblasts, liver and muscle. Enzyme assays revealed decreased Complex I activity. The identification of this novel LS MT-ND3 variant, the genomics of which was accomplished in less than 3.5 weeks, indicates that rapid genomic approaches may prove useful in time-sensitive cases with an unresolved genetic diagnosis.

  6. Rapid identification of a novel complex I MT-ND3 m.10134C>A mutation in a Leigh syndrome patient.

    Miller, David K; Menezes, Minal J; Simons, Cas; Riley, Lisa G; Cooper, Sandra T; Grimmond, Sean M; Thorburn, David R; Christodoulou, John; Taft, Ryan J

    2014-01-01

    Leigh syndrome (LS) is a rare progressive multi-system neurodegenerative disorder, the genetics of which is frequently difficult to resolve. Rapid determination of the genetic etiology of LS in a 5-year-old girl facilitated inclusion in Edison Pharmaceutical's phase 2B clinical trial of EPI-743. SNP-arrays and high-coverage whole exome sequencing were performed on the proband, both parents and three unaffected siblings. Subsequent multi-tissue targeted high-depth mitochondrial sequencing was performed using custom long-range PCR amplicons. Tissue-specific mutant load was also assessed by qPCR. Complex I was interrogated by spectrophotometric enzyme assays and Western Blot. No putatively causal mutations were identified in nuclear-encoded genes. Analysis of low-coverage off-target mitochondrial reads revealed a previously unreported mitochondrial mutation in the proband in MT-ND3 (m.10134C>A, p.Q26K), a Complex I mitochondrial gene previously associated with LS. Targeted investigations demonstrated that this mutation was 1% heteroplasmic in the mother's blood and homoplasmic in the proband's blood, fibroblasts, liver and muscle. Enzyme assays revealed decreased Complex I activity. The identification of this novel LS MT-ND3 variant, the genomics of which was accomplished in less than 3.5 weeks, indicates that rapid genomic approaches may prove useful in time-sensitive cases with an unresolved genetic diagnosis. PMID:25118196

  7. Strain-dependent ferroic properties of doped LaMO{sub 3}(M=Mn or Co) and BiFeO{sub 3}

    Doerr, Kathrin; Rata, Diana; Herklotz, Andreas; Bilani, Orkidia; Dekker, Martina; Schultz, Ludwig [IFW Dresden, Postfach 270116, 01171 Dresden (Germany); Reibold, Marianne [Technische Universitaet Dresden, Speziallabor Triebenberg, 01328 Dresden (Germany); Biegalski, Michael; Christen, Hans [Oak Ridge National Laboratory, CNMS, PO Box 2008, Bethel Valley Rd., Oak Ridge, TN 37831 (United States)

    2010-07-01

    Elastic strain at epitaxially grown interfaces provides an efficient coupling mechanism in two-phase multiferroics: piezoelectric or magnetostrictive strain arising from application of an electric or a magnetic field is transferred readily between the components. We employ a piezoelectric single-crystalline substrate to apply reversible biaxial strain to epitaxially grown magnetic or ferroelectric films and study the strain response of their ferroic properties. The relaxor-based 0.72PbMg{sub 1/3}Nb{sub 2/3}O{sub 3} -0.28PbTiO{sub 3}(001) (PMN-PT) proved to be a favourable piezo-substrate with large, reversible, uniform in-plane strain which shows little temperature dependence. The magnetization vs. strain of doped LaMO{sub 3} (M=Mn or Co) phases has been studied. It reveals the impact of the strain-induced tetragonal lattice distortion on the ferromagnetic double exchange and the magnetic moment of Co ions that leads to moderate or large magnetization modulation. Further, the strain dependence of ferroelectric switching has been investigated for multiferroic BiFeO{sub 3}. It displays a large response of unexpected sign attributed to a strain influence on kinetics.

  8. The central dynamics of M3, M13, and M92: Stringent limits on the masses of intermediate-mass black holes

    Kamann, Sebastian; Roth, Martin M; Gerssen, Joris; Husser, Tim-Oliver; Sandin, Christer; Weilbacher, Peter

    2014-01-01

    We used the PMAS integral field spectrograph to obtain large sets of radial velocities in the central regions of three northern Galactic globular clusters: M3, M13, and M92. By applying the novel technique of crowded field 3D spectroscopy, we measured radial velocities for about 80 stars within the central ~ 10 arcsec of each cluster. These are by far the largest spectroscopic datasets obtained in the innermost parts of these clusters up to now. To obtain kinematical data across the whole extent of the clusters, we complement our data with measurements available in the literature. We combine our velocity measurements with surface brightness profiles to analyse the internal dynamics of each cluster using spherical Jeans models, and investigate whether our data provide evidence for an intermediate-mass black hole in any of the clusters. The surface brightness profiles reveal that all three clusters are consistent with a core profile, although shallow cusps cannot be excluded. We find that spherical Jeans models...

  9. Competition between Alkalide Characteristics and Nonlinear Optical Properties in OLi3-M-Li3O (M=Li, Na and K) Complexes

    Srivastava, Ambrish Kumar

    2016-01-01

    Alkalides possess enhanced nonlinear optical (NLO) responses due to localization of excess electrons on alkali metals. We have proposed a new class of alkalides by sandwiching alkali atoms (M) between two Li3O superalkali clusters at MP2/6-311++G(d,p) level. We notice a competition between alkalide characteristics and NLO properties in OLi3-M-Li3O (M=Li, Na and K) isomers. For instance, the atomic charge on M (qM) in D2h structure is -0.58e for M=Li and its first static mean hyperpolarizablity (\\b{eta}o) is 1 a.u., but in C2v structure, qM=-0.12e and \\b{eta}o= 3.4*103 a.u. More interestingly, the \\b{eta}o value for M=K (C2v) increases to 1.9*104 a.u. in which qM=0.24e. These findings may provide new insights into the design of alkalides, an unusual class of salts and consequently, lead to further researches in this direction.

  10. Selective stripping of uranium from 0.3 M D2EHPA + 0.075 M TOPO/kerosene in the second extraction cycle

    Selective stripping of uranium and iron, from 0.3 M D2EHPA + 0.075 M TOPO/kerosene containing 0.0252 M uranium and 0.0064 M iron was investigated using alkaline and acidic media. It was found that, uranium yield increased, when the alkaline stripping agent concentration was increased, and the stripping yield followed the following order: Na2CO3 > (NH4)2 CO3> NH4 HCO3. However, the selectivity for uranium against iron followed the reverse order: NH4 HCO3 > (NH4)2 CO3 > Na2CO3. Moreover temperature in the range of (25 - 55 Centigrade) was found to have a positive effect on both uranium and iron stripping. Stripping by perchloride acid and nitric acid was not efficient. Hydrochloric and sulfuric acid showed a week stripping yield which increased as the acids concentrations were increased. Stripping by phosphoric acid was found to be efficient. Moreover, the selectivity of stripping by 2 M H3PO4 was high for iron as opposite to uranium. Therefore it was found advantageous to carry out stripping in two stages. The first stage would by 2 M H3PO4 to strip the iron and the second stage using one of the alkaline media mentioned previously to strip uranium completely. (authors)

  11. Antiferromagnetic spin glass-like behavior in sintered multiferroic Aurivillius Bim+1Ti3Fem−3O3m+3 compounds

    The structure, hyperfine interactions and magnetic properties of the series of multiferroic Bim+1Ti3Fem−3O3m+3 Aurivillius compounds with m=4–8 were studied using X-ray diffraction, 57Fe Mössbauer spectroscopy and vibrating sample magnetometry. Samples were prepared by the conventional solid-state sintering method. Bulk magnetic measurements showed that for m=4 the compound is paramagnetic down to 2 K while in the compound with m=5 the antiferromagnetic type transition was observed at 11 K. In the case of compounds with m=6–8 much more complex magnetic behavior was found. For these compounds a gradual spin freezing and antiferromagnetic spin glass-like ordering were observed on decreasing temperature. The temperature of spin glass freezing was determined as 260, 280 and 350 K for m=6, 7 and 8, respectively. Room-temperature Mössbauer spectra of all the compounds studied confirm their paramagnetic state. However, liquid nitrogen and liquid helium temperature measurements reveal magnetic ordering with a residual paramagnetic phase contribution for the compounds with m=5–8. - Highlights: • Aurivillius compounds prepared by solid-state sintering. • Coexistence of antiferromagnetic and paramagnetic phases seen by Mössbauer spectra. • Hyperfine interactions parameters of compounds determined. • Antiferromagnetic spin glass-like ordering observed down to 10 K

  12. Strain-dependent ferroic properties of doped LaMO3(M=Mn or Co) and BiFeO3

    Elastic strain at epitaxially grown interfaces provides an efficient coupling mechanism in two-phase multiferroics: piezoelectric or magnetostrictive strain arising from application of an electric or a magnetic field is transferred readily between the components. We employ a piezoelectric single-crystalline substrate to apply reversible biaxial strain to epitaxially grown magnetic or ferroelectric films and study the strain response of their ferroic properties. The relaxor-based 0.72PbMg1/3Nb2/3O3 -0.28PbTiO3(001) (PMN-PT) proved to be a favourable piezo-substrate with large, reversible, uniform in-plane strain which shows little temperature dependence. The magnetization vs. strain of doped LaMO3 (M=Mn or Co) phases has been studied. It reveals the impact of the strain-induced tetragonal lattice distortion on the ferromagnetic double exchange and the magnetic moment of Co ions that leads to moderate or large magnetization modulation. Further, the strain dependence of ferroelectric switching has been investigated for multiferroic BiFeO3. It displays a large response of unexpected sign attributed to a strain influence on kinetics.

  13. Photolabeling of membrane-bound Torpedo nicotinic acetylcholine receptor with the hydrophobic probe 3-trifluoromethyl-3-(m-[125I]iodophenyl)diazirine

    The hydrophobic, photoactivatable probe 3-trifluoromethyl-3-(m-[125I]iodophenyl)diazirine ([125I]TID) was used to label acetylcholine receptor rich membranes purified from Torpedo californica electric organ. All four subunits of the acetylcholine receptor (AChR) were found to incorporate label, with the γ-subunit incorporating approximately 4 times as much as each of the other subunits. Carbamylcholine, an agonist, and histrionicotoxin, a noncompetitive antagonist, both strongly inhibited labeling of all AChR subunits in a specific and dose-dependent manner. In contrast, the competitive antagonist α-bungarotoxin and the noncompetitive antagonist phencyclidine had only modest effect on [125I]TID labeling of the AChR. The regions of the AChR α-subunit that incorporate [125]TID were mapped by Staphylococcus aureus V8 protest digestion. The carbamylcholine-sensitive site of labeling was localized to a 20-kDa V8 cleavage fragment that begins at Ser-173 and is of sufficient length to contain the three hydrophobic regions M1, M2, and M3. A 10-kDa fragment beginning at Asn-339 and containing the hydrophobic region M4 also incorporated [125I]TID but in a carbamylcholine-insensitive manner. Two further cleavage fragments, which together span about one-third of the α-subunit amino terminus, incorporated no detectable [125I]TID. The mapping results place constraints on suggested models of AChR subunit topology

  14. EMR study of electronic and magnetic ordering in doped CaMn1-x,yMx,yO3 (M = Ru, Mo) perovskites

    X-band electron magnetic resonance of polycrystalline CaMn1-x,yMx,yO3 (M = Ru, 0 ≤ x≤ 0.5, M = Mo, 0≤ y ≤ 0.14) samples were performed at 120 K ≤ T ≤ 540 K. The observed anomalies of electron magnetic resonance parameters correlate pretty well with the temperatures of antiferro-, ferromagnetic-like and orbital/charge ordering transitions in these systems and specify phase diagrams obtained by order techniques. However, a strong difference between resonant properties of Ru- and Mo-doped series is observed in both paramagnetic and magnetically ordered states. To describe such a difference, the energy band diagrams, which comprise the deep impurity t2g-like states = eg-like conductive band for Ca Mn1-xRuxO3 and shallow impurity states + conductive band, both having eg-like symmetry, for CaMn1-yMoyO3, are proposed. Specific electrons' contribution to the electron magnetic resonance line width explains concentration and temperature dependences of this parameter in the paramagnetic state in considered systems. (author)

  15. Expression and relationship of microRNA-31 and FOXP3 mRNAs in CD4 + T cells from a mouse asthma model%哮喘小鼠CD4+T细胞中microRNA-31和FOXP3mRNA的表达及相互关系的研究

    酆孟洁; 史菲; 邱晨

    2012-01-01

    Objective To determine the expression levels of microRNA-31 and FOXP3 mRNAs in the spleen CD4 + T cells from asthma mice, and identify their relationship. Methods A total of 15 Balb/c mice were randomly divided into 3 groups, normal control group, model group, and dexamethasone treatment group. The murine asthma model was sensitized and challenged by ovalbumin ( OVA). The inflammatory cytokines IL-4 and IFN-γ in the bronchoalveolar lavage fluid ( BALF) in the 3 groups were measured by ELISA. Expression of microRNA-31 and FOXP3 mRNAs in spleen CD4 + T cells from the 3 groups were detected by quantitative real time-PCR assay. The relationship of the expression were also analyzed. Results The BALF level of IL-4 was increased in the model group (228.29 ±66. 18 pg/ml) compared with the normal control group (66.63 ± 17.33 pg/ml, P 0.05). There was no significant difference in levels of IFN-γ among the three groups( P > 0.05). The expression of FOXP3 Mrna in the spleen CD4 + T cells in the model group was 0. 10 times as great as in the normal control group (P 0. 05 ). The expressions of microRNA-31 Mrna in the splenn CD4+ T lymphocytes in the model group were 4.79 times as great as in the normal control (P 0. 05). Pearson correlation coefficient between microRNA-31 and FOXP3 Mrna was -0.609 (P<0.05). Conclusion There is a negative linear correlation between microRNA-31 and FOXP3 Mrna in asthma, and microRNA-31 and dexamethasone mayaffect the expression of FOXP3 Mrna via different pathways.%目的 初步探讨哮喘CD4+T细胞中microRNA-31和FOXP3的表达水平、两者的相关性及激素对它们的影响.方法 以卵蛋白(OVA)致敏激发建立哮喘小鼠模型.将15只BALB/c小鼠分为正常对照组、OVA组和地塞米松组,EHSA检测小鼠支气管肺泡灌洗液(BALF)中IL-4和IFN-γ水平;实时荧光定量PCR检测小鼠脾脏CD4+T细胞的microRNA-31和FOXP3 mRNA的水平,并分析二者之间的相关性.结果 OVA组BALF中IL-4

  16. Concretando la tercera misión (3m de la Universidad Pública Regional. Impactos y percepciones de un proyecto de extensión. Caso Universidad del Magdalena

    Pablo Hernán Vera Salazar

    2014-08-01

    Full Text Available El propósito de este artículo es presentar un análisis de la orientación asumida por una universidad de la región Caribe colombiana para desarrollar acciones ubicadas en lo que se ha denominado “la tercera misión de la universidad”. Adicionalmente, se hace análisis del efecto generado en la universidad por la ejecución de proyectos de extensión. El enfoque metodológico utilizado fue el de estudio de caso tomando un proyecto de intervención de alcance regional como unidad de análisis. En este contexto, las fuentes de información utilizadas fueron: información documental de la ejecución del proyecto, entrevistas semiestructuradas a los coordinadores del proyecto y una encuesta de percepción sobre la tercera misión dirigida a una muestra de profesores de la universidad. El principal hallazgo de este estudio fue la identificación y caracterización de la orientación asumida por la universidad objeto de estudio para desarrollar la tercera misión con énfasis en el desarrollo social del entorno. Aunque este estudio se limitó a un único caso en un contexto particular, los hallazgos obtenidos permitieron evidenciar algunos rasgos de la materialización de la tercera misión de la universidad, los cuales pueden servir de referencia para desarrollar estudios similares en otros contextos institucionales de la región y del país.Palabras clave: Tercera misión; extensión universitaria; responsabilidad social Universitaria; gestión de proyectos; innovación social.Specifying the third mission (3m of the Regional Public University. Impacts and perceptions of extension project. Case: University of MagdalenaAbstractThe purpose of this paper is to present an analysis of the orientation that is assumed by a university in the Colombian Caribbean region for developing actions in what has been known as “the university’s third mission”. In addition, an analysis about the effect on the university that is generated by the execution of

  17. Sobre la rehabilitación de la arquitectura

    Iglesia Salgado, Félix de la

    2012-01-01

    El presente ensayo reflexiona sobre el papel actual de la técnica de la arquitectura ante determinadas estrategias y comportamientos urbanos que, volcadas sobre nuevas situaciones resultado del cambio cualitativo y cuantitativo que se produce en nuestras ciudades, proponen una nueva urbanidad; una búsqueda, a partir de la rehabilitación del tejido residencial y los espacios de relación, sobre el control de los nuevos lugares y formas de habitabilidad que se hacen visibles como partes de una r...

  18. Pistas para pensar las significaciones imaginarias sobre la invariancia

    Bilyk, Pablo Andrés

    2011-01-01

    Este escrito propone un primer esbozo de nominalizaciones sobre las significaciones imaginarias en torno a la idea de invariancia, con el fin de comenzar a mapear categorías para transitar que nos permitan pensar las construcciones fantasmáticas sobre el no-cambio. En definitiva, se trata de avanzar sobre la problematización de los modos de funcionamiento, constitución y reconfiguraciones de las hegemonías en los entramados sociales contemporáneos.

  19. Pilas de arena sobre grafos dirigidos y algo de complejidad

    Carolina Mejía Moreno

    2006-01-01

    Full Text Available En este artículo estudiamos el Modelo de Pilas de Arena sobre grafos dirigidos. El comportamiento del modelo sobre grafos dirigidos es más complejo (en término estrictos que sobre grafos no dirigidos; es por ello que, para muchas de las preguntas centrales de la teoría, no se conoce la respuesta en el caso dirigido. En este artículo se ha sintetizado la teoría para digrafos, se han simplificado algunas pruebas y se concretan algunos resultados relacionados con la complejidad de predicción del autómata.

  20. Structure, phase transitions and molecular dynamics of [C(NH2)3]3[M2I9], M = Sb, Bi

    Two novel guanidinium iodoantimonate(III) and iodobismuthate(III) crystals, [C(NH2)3]3[Sb2I9] and [C(NH2)3]3[Bi2I9], have been synthesized and their structures have been determined by means of single-crystal x-ray diffraction studies at three temperatures (293, 348 and 362 K). Both compounds appeared to be isomorphous in corresponding phases. The crystal structure of the title compounds is composed of discrete M2I93- (M = Sb, Bi) anions and C(NH2)3+ guanidinium cations. A non-equivalence of two guanidinium cations has been found. Both guanidinium analogs exhibit a rich sequence of phase transitions. In Gu3Sb2I9, three solid-solid structural phase transformations of the first order type are detected at 119/121, 341/344 and 355/362 K (on cooling/heating) by the DSC and dilatometric techniques. Gu3Bi2I9 displays four first order phase transitions: 179/185, 202/215, 287/291 and 358/368 K. The low temperature phases appear to have ferroic (ferroelastic) properties. The prototypic paraelastic phase for both compounds belongs to hexagonal symmetry (space group P63/mmc). The dielectric response has been measured in a wide frequency region (100 Hz-1 MHz), but no dielectric dispersion has been detected. Possible mechanisms of the phase transitions in Gu3M2I9 (M = Sb, Bi) are discussed on the basis of the presented results

  1. Structure, phase transitions and molecular dynamics of [C(NH2)3]3[M2I9], M = Sb, Bi

    Szklarz, P.; Pietraszko, A.; Jakubas, R.; Bator, G.; Zieliński, P.; Gałazka, M.

    2008-06-01

    Two novel guanidinium iodoantimonate(III) and iodobismuthate(III) crystals, [C(NH2)3]3[Sb2I9] and [C(NH2)3]3[Bi2I9], have been synthesized and their structures have been determined by means of single-crystal x-ray diffraction studies at three temperatures (293, 348 and 362 K). Both compounds appeared to be isomorphous in corresponding phases. The crystal structure of the title compounds is composed of discrete M2I93- (M = Sb, Bi) anions and C(NH2)3+ guanidinium cations. A non-equivalence of two guanidinium cations has been found. Both guanidinium analogs exhibit a rich sequence of phase transitions. In Gu3Sb2I9, three solid-solid structural phase transformations of the first order type are detected at 119/121, 341/344 and 355/362 K (on cooling/heating) by the DSC and dilatometric techniques. Gu3Bi2I9 displays four first order phase transitions: 179/185, 202/215, 287/291 and 358/368 K. The low temperature phases appear to have ferroic (ferroelastic) properties. The prototypic paraelastic phase for both compounds belongs to hexagonal symmetry (space group P63/mmc). The dielectric response has been measured in a wide frequency region (100 Hz-1 MHz), but no dielectric dispersion has been detected. Possible mechanisms of the phase transitions in Gu3M2I9 (M = Sb, Bi) are discussed on the basis of the presented results.

  2. CG3TOOL: an interactive computer program to process Scintrex CG-3/3M gravity data for high-resolution applications

    Gabalda, G.; Bonvalot, S.; Hipkin, R.

    2003-03-01

    A newly developed interactive computer program, CG3TOOL, has been dedicated to the processing of the gravity data acquired by the Scintrex CG-3/3M automated gravity meter. The aim of CG3TOOL is two fold: to allow for an objective evaluation of Scintrex data and to provide a higher resolution in data reductions than those computed in real time by the microprocessor-controlled instrument. The program reads the gravity data acquired in either field or cycle mode (field surveys and continuous recordings, respectively) and then downloaded from the meter to a PC computer. The processing tasks are divided into two successive levels. Level 1 is dedicated to the reduction of the daily data files by applying standard or accurate corrections (earth tide, instrumental drift, atmospheric pressure). The precise corrections are performed up to the microGal (μGal) level, in accordance with the specifications of high-resolution surveys. Level 2 contains a series of processing tools (including network adjustment, anomaly computation, and gravity meter calibration) that will precisely compute and adjust the gravity values with error estimates. The interactive procedures and the program output (plot and text files) have been designed to ease data handling and archiving as well as to provide useful information for future purposes of data interpretation or modeling. CG3TOOL was developed in a standard C language for Unix Sun workstations and uses the standard graphical and mathematical Generic Mapping Tools (GMT) free library, available from the web. The objectives and principles of the computer program are presented below along with corresponding examples of the main processing tasks applied to observed data.

  3. Photoluminescence properties of M{sub 2}Mg(BO{sub 3}){sub 2}:Sm{sup 3+} (M:Sr and Ba)

    PEKGOeZLUe, Ilhan, E-mail: pekgozluilhan@yahoo.com [Bartin University, Faculty of Engineering, Department of Environmental Engineering, Bartin 74100 (Turkey)

    2013-02-15

    M{sub 2}Mg(BO{sub 3}){sub 2}:Sm{sup 3+} (M:Sr and Ba) phosphors were synthesized by a solution combustion synthesis method followed by heating of the precursor combustion ash at 900 Degree-Sign C in air. The synthesized materials were characterized by using the powder XRD. The emission and excitation spectra of these materials were measured at room temperature with a spectrofluorometer. Both Sr{sub 2}Mg(BO{sub 3}){sub 2}:Sm{sup 3+} and Ba{sub 2}Mg(BO{sub 3}){sub 2}:Sm{sup 3+} phosphors emit a strong in orange-red region. It was observed that the optimum concentration of Sm{sup 3+} in Sr{sub 2}Mg(BO{sub 3}){sub 2} and Ba{sub 2}Mg(BO{sub 3}){sub 2} are 0.01 and 0.04 mol, respectively. Finally, the relation between the photoluminescence properties of Sm{sup 3+} and host compositions was discussed in detail. - Highlights: Black-Right-Pointing-Pointer It has synthesized two novel inorganic borate phosphors for the first time. Black-Right-Pointing-Pointer The synthesized materials were characterized by using the powder X Ray Diffraction. Black-Right-Pointing-Pointer The photoluminescence properties of both phosphors were investigated using a spectrofluorometer. Black-Right-Pointing-Pointer Both Sr{sub 2}Mg(BO{sub 3}){sub 2}: Sm{sup 3+} and Ba{sub 2}Mg(BO{sub 3}){sub 2}: Sm{sup 3+} phosphors emit a strong in orange-red region.

  4. Alkaline Earth Metal Zirconate Perovskites MZrO3 (M=Ba(2+), Sr(2+), Ca(2+)) Derived from Molecular Precursors and Doped with Eu(3+) Ions.

    Drąg-Jarząbek, Anna; John, Łukasz; Petrus, Rafał; Kosińska-Klähn, Magdalena; Sobota, Piotr

    2016-03-24

    The effect of alkaline earth metal alkoxides on the protonation of zirconocene dichloride was investigated. This approach enabled the design of compounds with preset molecular structures for generating high-purity binary metal oxide perovskites MZrO3 (M=Ba(2+), Sr(2+), Ca(2+)). Single-source molecular precursors [Ba4 Zr2 (μ6 -O)(μ3 ,η(2)-OR)8 (OR)2(η(2) -HOR)2 (HOR)2 Cl4], [Sr4 Zr2 (μ6 -O)(μ3 ,η(2)-OR)8 (OR)2 (HOR)4 Cl4], [Ca4 Zr2 (μ6-O)(μ3 ,η(2)-OR)8 (OR)2 Cl4], and [Ca6 Zr2 (μ2 ,η(2)-OR)12 (μ-Cl)2 (η(2) -HOR)4 Cl6 ]⋅8 CH2 Cl2 were prepared via elimination of the cyclopentadienyl ring from Cp2 ZrCl2 as CpH in the presence of M(OR)2 and alcohol ROH (ROH=CH3OCH2 CH2OH) as a source of protons. The resulting complexes were characterized by elemental analysis, IR and NMR spectroscopy, and single-crystal X-ray diffraction. The compounds were then thermally decomposed to MCl2 /MZrO3 mixtures. Leaching of MCl2 from the raw powder with deionized water produced highly pure perovskite-like oxide particles of 40-80 nm in size. Luminescence studies on Eu(3+)-doped MZrO3 revealed that the perovskites are attractive host lattices for potential applications in display technology. PMID:26891039

  5. Investigation of exchange bias in 0.1MFe2O4/0.9BiFeO3 (M=Co, Cu, Ni) nanocomposite

    The 0.1MFe2O4/0.9BiFeO3 (M=Co, Cu, Ni) nanocomposite samples were synthesized by the sol–gel method. Phase composition analysis was carried out, which showed that these bulk samples were composed of a ferrimagnetic MFe2O4 (M=Co, Cu, Ni) and a ferroelectric antiferromagnet (FEAF) BiFeO3 phases, respectively. The magnetic properties of all the samples were investigated by measuring their magnetization as a function of temperature and magnetic field. These results indicated that the magnetic hysteresis loops of 0.1CuFe2O4/0.9BiFeO3 sample sintered in air atmosphere at 550 °C for 3 h exhibited a negative shift and an enhanced coercivity at low temperature ascribed to strong exchange coupling between the BiFeO3 and CuFe2O4 grains. However, there were no magnetic hysteresis loops in both the 0.1CoFe2O4/0.9BiFeO3 sample and the 0.1NiFe2O4/0.9BiFeO3 sample. In view of these results, we tend to think the CuFe2O4/BiFeO3 nanocomposite system may be a useful multifunctional material. - Highlights: ► Exchange bias effect in ferroelectric antiferromagnet (FEAF)/ferromagnet (FM) nanocomposites. ► Exchange bias effect is only observed in the 0.1CuFe2O4/0.9BiFeO3 nanocomposite. ► Lower saturation magnetization is important for producing exchange bias in FEAF/FM system.

  6. Na2M2(SO4)3 (M = Fe, Mn, Co and Ni): towards high-voltage sodium battery applications.

    Araujo, Rafael B; Chakraborty, Sudip; Barpanda, Prabeer; Ahuja, Rajeev

    2016-04-14

    Sodium-ion-based batteries have evolved as excellent alternatives to their lithium-ion-based counterparts due to the abundance, uniform geographical distribution and low price of Na resources. In the pursuit of sodium chemistry, recently the alluaudite framework Na2M2(SO4)3 has been unveiled as a high-voltage sodium insertion system. In this context, the framework of density functional theory has been applied to systematically investigate the crystal structure evolution, density of states and charge transfer with sodium ions insertion, and the corresponding average redox potential, for Na2M2(SO4)3 (M = Fe, Mn, Co and Ni). It is shown that full removal of sodium atoms from the Fe-based device is not a favorable process due to the 8% volume shrinkage. The imaginary frequencies obtained in the phonon dispersion also reflect this instability and the possible phase transition. This high volume change has not been observed in the cases of the Co- and Ni-based compounds. This is because the redox reaction assumes a different mechanism for each of the compounds investigated. For the polyanion with Fe, the removal of sodium ions induces a charge reorganization at the Fe centers. For the Mn case, the redox process induces a charge reorganization of the Mn centers with a small participation of the oxygen atoms. The Co and Ni compounds present a distinct trend with the redox reaction occurring with a strong participation of the oxygen sublattice, resulting in a very small volume change upon desodiation. Moreover, the average deintercalation potential for each of the compounds has been computed. The implications of our findings have been discussed both from the scientific perspective and in terms of technological aspects. PMID:26996444

  7. Structural and soft magnetic properties of Fe73.5Nb3M1Si13.5B9 (M=Cu, Mn, Pt)

    The magnetic and the structural properties have been investigated for Fe73.5Nb3M1Si13.5B9 (M=Cu, Mn, Pt) alloys in their as-received and heat-treated state. Differential scanning calorimeter and scanning electrical resistivity were used to study crystallization behaviour and to examine the influence of the nucleation elements Cu, Mn and Pt on the structural and magnetic properties of Fe-based nanocrystalline materials. The temperature coefficient of resistivity above Curie temperature was found to be very low (0.2x10-4 K-1) in the Cu containing alloy as compared to the alloys which contained Mn or Pt. A broad exothermic DSC peak for the formation of Fe3Si nanoparticles was absent when Cu was replaced by Mn or Pt. Instead, a sharp exothermic peak for the formation of Fe3(SiB) phase was observed with an onset at 875 K. The magnetic properties of the three alloys measured after stress relaxed annealing were similar. However, after first-stage crystallization, the soft magnetic properties were further enhanced only in Cu containing alloys due to the formation of Fe3Si nanoparticles. Such nanoparticles together with different intermetallic phases like FeMn3 or FePt3 were formed in Mn or Pt containing alloys. Moreover, the NbFeSi phase was also formed in the latter alloys after higher temperature annealing which reduced not only the amount of the Fe3Si phase but also the grain refining effect due to the lesser amount of Nb available at the grain boundary. When Cu was replaced by Mn or Pt, the formation of different intermetallics reduced the volume fraction of Fe3Si nanoparticles and the lesser amount of grain refining Nb made the materials magnetically inferior after annealing above 775 K

  8. σ-Aromatic cyclic M3(+) (M = Cu, Ag, Au) clusters and their complexation with dimethyl imidazol-2-ylidene, pyridine, isoxazole, furan, noble gases and carbon monoxide.

    Pan, Sudip; Saha, Ranajit; Mandal, Subhajit; Chattaraj, Pratim K

    2016-04-28

    The σ-aromaticity of M3(+) (M = Cu, Ag, Au) is analyzed and compared with that of Li3(+) and a prototype σ-aromatic system, H3(+). Ligands (L) like dimethyl imidazol-2-ylidene, pyridine, isoxazole and furan are employed to stabilize these monocationic M3(+) clusters. They all bind M3(+) with favorable interaction energy. Dimethyl imidazol-2-ylidene forms the strongest bond with M3(+) followed by pyridine, isoxazole and furan. Electrostatic contribution is considerably more than that of orbital contribution in these M-L bonds. The orbital interaction arises from both L → M σ donation and L ← M back donation. M3(+) clusters also bind noble gas atoms and carbon monoxide effectively. In general, among the studied systems Au3(+) binds a given L most strongly followed by Cu3(+) and Ag3(+). Computation of the nucleus-independent chemical shift (NICS) and its different extensions like the NICS-rate and NICS in-plane component vs. NICS out-of-plane component shows that the σ-aromaticity in L bound M3(+) increases compared to that of bare clusters. The aromaticity in pyridine, isoxazole and furan bound Au3(+) complexes is quite comparable with that in the recently synthesized Zn3(C5(CH3)5)3(+). The energy gap between the highest occupied molecular orbital and the lowest unoccupied molecular orbital also increases upon binding with L. The blue-shift and red-shift in the C-O stretching frequency of M3(CO)3(+) and M3(OC)3(+), respectively, are analyzed through reverse polarization of the σ- and π-orbitals of CO as well as the relative amount of OC → M σ donation and M → CO π back donation. The electron density analysis is also performed to gain further insight into the nature of interaction. PMID:26624276

  9. El puente Bendorf sobre el Rin (Alemania

    Hirschfeld, Kurt

    1966-03-01

    Full Text Available This recently completed bridge over the Rhine is 524 m long, and is a reinforced concrete structure, built by successive overhangs, without the aid of formwork or scaffolding. The centre span is 208 m in length, and the other six vary between 43 and 71 m. The deck consists of two independent parts, including a continuous box girder, with a hinge at the crown of the main span. It is stiffened with transversal diaphragms, spaced every 34 m. The piles rest on pneumatic caissons, which go down to 16 m below the river bed. The attachment between the piles and the caissons is rigid, at the central pile, and at the other piles it operates through a roller bearing. The central span was constructed without intermediate supports for the first 40 m, and beyond that stage, for greater safety, a provisional movable tower was built, as a temporary point of support for the free overhang. The various sections were concreted and post-tensioned with 32 mm bars, by the Dywidag procedure. Account was taken of the varying deformations that took place at each section, so as to add the necessary counter-deflection that finally enabled the two sides of the arch to meet at the crown at the calculated point.Este puente, recientemente construido, sobre el Rin, tiene una longitud total de 524 m, es de hormigón armado y se ha realizado por el procedimiento de voladizos sucesivos, sin entramado auxiliar ni cimbras. La luz del tramo central es de 208 m, y las de los otros seis oscilan entre 43 y 71 m. La estructura del tablero se compone de dos partes independientes, formadas por una viga tipo cajón, continua, con una articulación en la clave del tramo central y rigidizada con diafragmas transversales espaciados a 34 m. Las pilas centrales se apoyan sobre cajones neumáticos que descienden 16 m debajo del fondo del río. La unión entre estas pilas y la estructura cajón es rígida, y de tipo rodillo en las otras pilas. El tramo central se ha construido por voladizos

  10. Algunas reflexiones sobre el poder itinerante almohade.

    Maribel FIERRO

    2009-12-01

    Full Text Available La primera parte del artículo consiste en la presentación de dos estudios sobre el poder itinerante en el Magreb: Jocelyne Dakhlia (1988 para las épocas hafsí y posteriores; Manuela Marín (2005 sobre el caso almohade. En la segunda parte, primeramente se analiza la convergencia del itinerario de Ibn Tumart con las conquistas de ‘Abd al-Mu’min: el movimiento –real o legendario– del fundador mesiánico del imperio marca el territorio conquistado por su sucesor el califa y su presencia inserta el espacio en la memoria, la geografía y el poder imperiales. A continuación, se plantea la compleja cuestión de la «capitalidad» almohade: se puede hablar de una capital sagrada (Tinmal, una capital central (Marrakech, capitales regionales (Sevilla, Túnez y de una nueva capital inacabada (Rabat. Pero es la presencia (hadar del propio califa la que determina dónde está el centro del imperio.La première partie de cet article présente deux études sur le pouvoir itinérant au Mahgreb : celle de Jocelyne Dakhlia (1986 sur la période hafside et les suivantes, celle de Manuela Marín (2005 sur le cas almohade.Dans la seconde partie, on analyse d’abord la convergence de l’itinéraire d’Ibn Tumart avec les conquêtes d’‘Abd al-Mu’min : le  trajet – réel ou légendaire – du fondateur messianique de l’empire marque le territoire conquis par son successeur le calife et sa présence ancre l’espace dans la mémoire, la géographie et le pouvoir impériaux. Ensuite, on examine la question complexe de la « capitalité » almohade : on peut parler d’une capitale sacrée (Tinmal, d’une capitale centrale (Marrakech, de capitales régionales (Séville, Tunis et d’une nouvelle capitale inachevée (Rabat. Mais c’est la présence (hadar du calife lui-même qui détermine où est le centre de l’empire.

  11. Ab initio investigation of the oxygen reduction reaction activity on noble metal (Pt, Au, Pd), Pt3M (M = Fe, Co, Ni, Cu) and Pd3M (M = Fe, Co, Ni, Cu) alloy surfaces, for Lisbnd O2 cells

    Sankarasubramanian, Shrihari; Singh, Nikhilendra; Mizuno, Fuminori; Prakash, Jai

    2016-07-01

    First principles, density functional theory (DFT) modelling of the oxygen reduction reaction (ORR) on noble metal (Pt, Au, Pd), Pt3M (M = Fe, Co, Ni, Cu) and Pd3M (M = Fe, Co, Ni, Cu) alloy surfaces, was carried out. Periodic models of close-packed (111) surfaces were constructed, their geometry was optimized and the most stable geometric surface configuration was identified. The correlation between the intermediate species binding energy and the favored reaction pathway from amongst 1e-, 2e-, and 4e- mechanisms were studied by calculating the binding energies of a 1/4 monolayer of O, O2, LiO, LiO2, Li2O2, and Li2O on various sites and orientations. The reaction free energies (ΔGrxn) were calculated and used to compute the catalytic activity of the surfaces using molecular kinetics theory. Plots of the catalytic activity vs. Oxygen binding energy (EBinding (O)) showed a typical "volcano" profile. The insights gained from this study can be used to guide the choice of cathode catalysts in Lisbnd O2 cells.

  12. Ação da melatonina sobre a dinâmica sanguínea de ratas prenhes e sobre a histogênese do baço e do timo da prole

    A.C.C. Araújo

    2013-04-01

    Full Text Available Investigou-se a influência da melatonina sobre o hemograma de ratas prenhes e dos filhotes e sobre a histogênese e morfometria do baço e do timo dos filhotes. A melatonina foi administrada na dose 0,5mg/kg de peso corporal, dissolvida em 0,1mL de etanol e diluída em 0,3mL de solução salina. Para análise do hematócrito, contagem total de hemácias e contagem total e diferencial dos leucócitos, amostras de sangue foram coletadas no sétimo, 14ºe 21ºdias de prenhez e aos 10 dias de nascimento dos filhotes. Cortes histológicos do baço e do timo da prole foram utilizados para histoquímica e morfometria. A ausência da melatonina promoveu alterações no hemograma apenas no terço final da gestação, sem interferir no hemograma dos filhotes, e induziu modificações morfológicas e morfométricas no timo e no baço nos primeiros dias de vida dos filhotes. Concluiu-se que a melatonina materna é importante para a modulação do hemograma em ratas prenhes e para o desenvolvimento normal do baço e do timo dos filhotes.

  13. NOTAS SOBRE A IRRACIONALIDADE DA GUERRA

    Edilene Leal

    2014-08-01

    Full Text Available Nesse artigo, procedemos a uma análise sobre a irracionalidade da guerra em tempos cada vez mais caracterizados pela evolução da racionalidade técnica, ou seja, em tempos contemporâneos. Esse é o ponto a partir do qual traçamos, aqui, um percurso argumentativo dividido em duas partes. Na primeira, reconstituímos elementos da concepção de guerra de filósofos como Maquiavel, Clausewitz e Kant, destacando, nos dois primeiros pensadores, a prerrogativa de que a guerra é racional quando se configura meio para fins políticos. Na segunda parte, confrontamos essa racionalidade política da guerra com a dupla dimensão técnica que a guerra assumiu: de um lado, a guerra como um fim em si mesmo e não mais como meio da ação política; de outro, a dimensão racionalizante da guerra como resultado do progresso técnico e científico, atualizada como guerra do terror.

  14. sobre la población

    Mauricio Schoijet

    2005-01-01

    Full Text Available En este artículo se analizan varios elementos de la obra de Thomas Malthus sobre población, en particular la recepción de su teoría y su posición política. Se resumen las críticas políticas, ideológicas y científicas que ha recibido, y se examinan asuntos hasta ahora no tratados por otros comentaristas, como es el caso de las excepciones admitidas por Malthus respecto al papel de las relaciones sociales feudales en la agricultura de Polonia y Rusia. Se sugiere que pese a que su teoría tendía a reforzar la pesada represión social y sexual existente, Malthus no fue apoyado por la burguesía británica (contrariamente a la apreciación de Marx. Se deduce que Malthus no percibió cabalmente los avances de la agricultura, y se refuta la tesis de Donald Winch de que habría sido un liberal de izquierda en política pues si bien en algunos aspectos se le puede considerar progresista, en otros, esenciales, conservador extremadamente represivo o protofascista, incluso precursor de la teoría de los golpes de Estado.

  15. Consideraciones sobre de la ética

    Enrique Cantolla Bernal

    2005-12-01

    Full Text Available El presente ensayo muestra como el hombre, a través de la historia, a estado constantemente buscando beneficios para su vida y ha debido cumplir con varias tareas, que con el tiempo han dado origen a costumbres y comportamientos que han llevado a constituir la moral y la ética. Esta última, nos permite definir y determinar los principales fines de la vida del hombre y cuales son los principios y normas que lo rigen. Así, el estudio de la ética nos plantea la interrogante sobre "los fines de la vida en este mundo" y cuales son las conductas para conseguirlos. Sin embargo, el autor plantea que el hombre se enfrenta a la elección de valores alternativos y ante la interrogante de ¿cuál es el sumo bien del ser humano y de la sociedad?, han surgido diversas teorías que muestran como, casi todas las sociedades, han elegido la búsqueda de la felicidad como "el sumo bien", pero este concepto de "la felicidad" ha variando producto de las diversas teorías y doctrinas, que han emergido a lo largo de su historia.

  16. Fechas y sospechas sobre Lucas de Tuy

    Linehan, Peter

    2002-06-01

    Full Text Available The present essay seeks to establish what we know, as opposed to what we think we know, about the author of the Chronicon Mundi. Amongst the issues investigated are those of don Lucas's origins, the nature of his connections with León, the date of his activity as chronicler, and the use which may have been made of that work by D. Rodrigo Jiménez de Rada in the De rebus Hispaniae.

    El presente estudio busca establecer qué es lo que sabemos, en oposición a qué es lo que pensamos que sabemos, sobre el autor del Chronicon mundi. Entre los aspectos investigados están los orígenes de don Lucas de Tuy, la naturaleza de sus conexiones con León, la datación de su actividad como cronista así como el uso que pudiera haber hecho Rodrigo Jiménez de Rada de su obra en el De rebus Hispaniae.

  17. Estudio sobre encofrados de madera modernos

    de la Peña Aznar, Juan M.

    1980-06-01

    Full Text Available This article is a compendium of almost all of the existing literature, in addition to important contributions by the author, on forms —an important aspect of the building industry, as their cost is not infrequently as high or higher than that of the actual concrete poured. Thus, to the benefit of architects, engineers, site supervisors and carpenters, data are provided, as well as charts and calculations for a rational use of these forms, whether wooden, metal or of other material.

    En este artículo se compendia casi toda la literatura existente, así como importantes aportaciones del autor, sobre encofrados, capítulo importante en la construcción, ya que su costo resulta no pocas veces tan elevado o más que el propio hormigón vertido. Así pues en beneficio de arquitectos, ingenieros, encargados y carpinteros se dan datos, cuadros y ábacos para el empleo racional de los citados encofrados, sean de madera, metálicos, etc.

  18. Estudio sobre encofrados de madera modernos

    de la Peña Aznar, Juan M.

    1980-10-01

    Full Text Available This article is a compendium of almost all of the existing literature, in addition to important contributions by the author, on forms —an important aspect of the building industry, as their cost is not infrequently as high or higher than that of the actual concrete poured. Thus, to the benefit of architects, engineers, site supervisors and carpenters, data are provided, as well as charts and calculations for a rational use of these forms, whether wooden, metal or of other material.

    En este artículo se compendia casi toda la literatura existente, así como importantes aportaciones del autor, sobre encofrados, capítulo importante en la construcción, ya que su costo resulta no pocas veces tan elevado o más que el propio hormigón vertido. Así pues en beneficio de arquitectos, ingenieros, encargados y carpinteros se dan datos, cuadros y ábacos para el empleo racional de los citados encofrados, sean de madera, metálicos, etc.

  19. Estudio sobre encofrados de madera modernos

    de la Peña Aznar, Juan M.

    1980-03-01

    Full Text Available This article is a compendium of almost all of the existing literature, in addition to important contributions by the author, on forms —an important aspect of the building industry, as their cost is not infrequently as high or higher than that of the actual concrete poured. Thus, to the benefit of architects, engineers, site supervisors and carpenters, data are provided, as well as charts and calculations for a rational use of these forms, whether wooden, metal or of other material.

    En esta artículo sa compendia casi toda la literatura existente, así como importantes aportaciones del autor, sobre encofrados, capítulo importante en la construcción, ya que su costo resulta no pocas veces tan elevado o más que el propio hormigón vertido. Así, pues, en beneficio de arquKectos, ingenieros, encargados y carpinteros, se dan datos, cuadros y abacos para el empleo racional de los citados encofrados, sean de madera, metálicos, etcétera.

  20. Consideraciones sobre diferentes procesos productivos y sus consecuencias sobre el medio ambiente

    Caridad Ramos Alvariño

    2004-01-01

    Full Text Available En el presente trabajo se exponen algunas consideraciones sobre diferentes procesos productivos y sus consecuencias sobre el medio ambiente. La disminución del impacto negativo de algunas producciones sobre el medio ambiente es favorable, pero el problema va más allá y de lo que se trata es de la necesidad de una transformación sostenible de las producciones que puedan conducir a una vida agradable y una naturaleza conservada entre otras muchas cuestiones que agobian hoy al mundo. La solución al problema puede ser alcanzada con mayor prioridad en la reducci ón de la fuente primaria de la contaminación, seguida por el reciclaje y el desarrollo de tecnologías limpias. La reducción en la fuente se aplica por los cambios de productos y procesos. El cambio de la fuente se relaciona con la composición o el uso de los productos intermedios y finales, que reduzcan los residuos de producción, su uso o la disposición de los productos. Los cambios de procesos están relacionados con la sustitución de las materias primas de entrada, la modificación de las tecnologías y las mejoras operacionales. Las opciones específicas pueden incluir: el uso de materiales menos tóxicos, el aumento de la automatización, los procedimientos para las operaciones y el mantenimiento, el control de inventario, entre otros.

  1. Algunas reflexiones acerca de la encuesta sobre trabajo colaborativo

    Gargiulo, Sandra; Ponz, María Jimena

    2014-01-01

    Comenzamos el mes de noviembre con un nuevo tema del mes: Dinámicas de trabajo colaborativo virtual. Para ello, queremos compartir los resultados arrojados por la encuesta sobre el trabajo colaborativo que muchos de ustedes han completado.

  2. Normativa sobre el impuesto sobre los gases efecto hivernadero (Green house gases tax)

    Rodrigo de Larrucea, Jaime

    2013-01-01

    Como dice el apartado V de la Exposición de motivos de la Ley 16/2013, se crea un nuevo impuesto sobre los gases de efecto invernadero, relativo a los gases fluorados que se utilizan habitualmente en numerosos sectores como refrigerantes, disolventes, agentes espumantes o agentes extintores de incendios, para paliar de alguna manera su negativa contribución al calentamiento de la atmósfera, con un potencial de calentamiento global mucho más elevado que el CO2.

  3. Notas sobre o bicho-da-seda no folclore Chinês

    Nelson Papavero

    2011-03-01

    Full Text Available Notas sobre o bicho-da-seda no folclore chinês. Duas lendas sobre o bicho-da-seda (Bombyx mori Linnaeus, 1758 no folclore chinês são apresentadas: uma sobre a sua origem, a outra sobre os gatos como protetores do bicho-da-seda e da sericultura.

  4. Banco Interamericano de Desarrollo informe sobre sostenibilidad 2011

    Banco Interamericano de Desarrollo (BID)

    2012-01-01

    El Informe de Sostenibilidad contiene información sobre las contribuciones del BID a la sostenibilidad durante el año 2011. También proporciona información sobre las tendencias fundamentales del desarrollo y las dimensiones de sostenibilidad en América Latina y el Caribe. Este año, el informe se centra en la sostenibilidad y la agricultura en la región

  5. Reflexiones sobre el género y la censura

    Daniel Cazés Menache

    2006-01-01

    Este trabajo analiza y reflexiona sobre la primera censura social: la censura genérica, es decir, la estructurada sobre la adscripción de género, arena en la que se sintetizan todas las censuras sociales destinadas a controlar a cada sujeto y a mantenerlo sometido a dominios de los que no podrá librarse ni para aceptarlos ni para ejercerlos.

  6. BTG/Tob family members Tob1 and Tob2 inhibit proliferation of mouse embryonic stem cells via Id3 mRNA degradation

    Chen, Yuanfan; Wang, Chenchen [Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191 (China); Peking University Stem Cell Research Center, China National Center for International Research, Peking University Health Science Center, Beijing 100191 (China); SARI Center for Stem Cell and Nanomedicine, Shanghai Advanced Research Institute, University of Chinese Academy of Sciences, Shanghai 200120 (China); Wu, Jenny [SARI Center for Stem Cell and Nanomedicine, Shanghai Advanced Research Institute, University of Chinese Academy of Sciences, Shanghai 200120 (China); Li, Lingsong, E-mail: lils@sari.ac.cn [Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191 (China); Peking University Stem Cell Research Center, China National Center for International Research, Peking University Health Science Center, Beijing 100191 (China); SARI Center for Stem Cell and Nanomedicine, Shanghai Advanced Research Institute, University of Chinese Academy of Sciences, Shanghai 200120 (China)

    2015-07-03

    The mammalian BTG/Tob family is a group of proteins with anti-proliferative ability, and there are six members including BTG1, BTG2/PC3/Tis21, BTG3/ANA, BTG4/PC3B, Tob1/Tob and Tob2. Among them, Tob subfamily members, specifically Tob1/Tob and Tob2, have the most extensive C-terminal regions. As previously reported, overexpression of BTG/Tob proteins is associated with the inhibition of G1 to S-phase cell cycle progression and decreased cell proliferation in a variety of cell types. Tob subfamily proteins have similar anti-proliferative effects on cell cycle progression in cultured tumor cells. An important unresolved question is whether or not they have function in rapidly proliferating cells, such as embryonic stem cells (ESCs). Tob1 and Tob2 were expressed ubiquitously in mouse ESCs (mESCs), suggesting a possible role in early embryonic development and mESCs. To address the above question and explore the possible functions of the Tob subfamily in ESCs, we established ESCs from different genotypic knockout inner cell mass (ICM). We found that Tob1{sup −/−}, Tob2{sup −/−}, and Tob1/2 double knockout (DKO, Tob1{sup −/−} & Tob2{sup −/−}) ESCs grew faster than wild type (WT) ESCs without losing pluripotency, and we provide a possible mechanistic explanation for these observations: Tob1 and Tob2 inhibit the cell cycle via degradation of Id3 mRNA, which is a set of directly targeted genes of BMP4 signaling in mESCs that play critical roles in the maintenance of ESC properties. Together, our data suggest that BTG/Tob family protein Tob1 and Tob2 regulation cell proliferation does not compromise the basic properties of mESCs. - Highlights: • We established mouse Tob1/2 double knockout embryonic stem cells. • Tob1 and Tob2 inhibit the proliferation of ESCs without effect on pluripotency. • Tob1 and Tob2 involved in the degradation of Id3 in mESCs.

  7. Elastic relaxations associated with the Pm3m-R3c transition in LaA103 III: superattenuation of acoustic resonances

    Darling, Timothy W [Los Alamos National Laboratory; Carpenter, M A [UNIV OF CAMBRIDGE; Buckley, A [UNIV OF CAMBRIDGE; Taylor, P A [UNIV OF CAMBRIDGE; Mcknight, R E A [UNIV OF CAMBRIDGE

    2009-01-01

    Resonant Ultrasound Spectroscopy has been used to characterize elastic softening and a variety of new acoustic dissipation processes associated with the Pm{bar 3}m {leftrightarrow} R{bar 3}c transition in single crystal and ceramic samples of LaAlO{sub 3}. Softening of the cubic structure ahead of the transition point is not accompanied by an increase in dissipation but follows different temperature dependences for the bulk modulus, 1/3(C{sub 11} + 2C{sub 12}), and the shear components 1/2(C{sub 11}-C{sub 12}) and C{sub 44} as if the tilting instability contains two slightly different critical temperatures. The transition itself is marked by the complete disappearance of resonance peaks (superattenuation), which then reappear below {approx}700 K in spectra from single crystals. Comparison with low frequency, high stress data from the literature indicate that the dissipation is not due to macroscopic displacement of needle twins. An alternative mechanism, local bowing of twin walls under low dynamic stress, is proposed. Pinning of the walls with respect to this displacement process occurs below {approx}350 K. Anelasticity maps, analogous to plastic deformation mechanism maps, are proposed to display dispersion relations and temperature/frequency/stress fields for different twin wall related dissipation mechanisms. An additional dissipation process, with an activation energy of 43 {+-} 6 kJ.mole{sup -1}, occurs in the vicinity of 250 K. The mechanism for this is not known, but it is associated with C{sub 44} and therefore appears to be related in some way to the cubic {leftrightarrow} rhombohedral transition at {approx}817 K. Slight softening in the temperature interval {approx}220 {yields} 70 K of resonance peaks determined by shear elastic constants hints at an incipient E{sub g} ferroelastic instability in LaAlO{sub 3}. The softening interval ends with a further dissipation peak at {approx} 60 K, the origin of which is discussed in terms of freezing of atomic

  8. Comparison of the Baird-Parker agar and 3M Petrifilm Staph Express Count plate methods for enumeration of Staphylococcus aureus in naturally and artificially contaminated foods.

    Ingham, Steven C; Becker, Katie L; Fanslau, Melody A

    2003-11-01

    The recently developed 3M Petrifilm Staph Express Count plate (PFSE) method was compared with the U.S. Food and Drug Administration Bacteriological Analytical Manual's Baird-Parker agar spread plate (B-P) method for enumeration of Staphylococcus aureus in naturally contaminated, mechanically separated poultry (MSP; n = 92) and raw milk (n = 12). In addition, mozzarella and Parmesan cheeses and hot-smoked rainbow trout and chub were surface inoculated with a three-strain mixture of S. aureus, stored at 5 degrees C, and periodically analyzed with both methods for numbers of S. aureus. For naturally contaminated raw milk and MSP samples, the PFSE method yielded counts that were not significantly different (P > 0.05) from counts obtained using the B-P method. From raw milk and MSP samples, 60% (21 of 35) and 55% (124 of 226), respectively, of confirmed (DNAse-positive) isolates from PFSE plates were identified by further testing as S. aureus. Corresponding S. aureus identification rates for isolates forming typical colonies on B-P plates were 53% (19 of 36) and 50% (125 of 248). For both methods, other staphylococci composed the vast majority of tested isolates that were not identified as S. aureus. For inoculated hot-smoked fish, S. aureus counts from the PFSE method were not significantly different from counts from the B-P method. Compared to the B-P method, significantly lower numbers of inoculated S. aureus were recovered using the PFSE method in analyses of mozzarella cheese stored 28 and 42 days at 4 degrees C. The PFSE and B-P methods were not significantly different for inoculated cheeses at all other sampling times. DNAse-positive isolates from PFSE analyses of inoculated cheeses and smoked fish were identified as S. aureus 98% (51 of 52) and 86% (36 of 42) of the time, respectively, as compared with 100% (58 of 58) and 95% (40 of 42) of the time for typical B-P isolates. Overall, the PFSE and B-P methods appeared to perform similarly in enumeration of S

  9. BTG/Tob family members Tob1 and Tob2 inhibit proliferation of mouse embryonic stem cells via Id3 mRNA degradation

    The mammalian BTG/Tob family is a group of proteins with anti-proliferative ability, and there are six members including BTG1, BTG2/PC3/Tis21, BTG3/ANA, BTG4/PC3B, Tob1/Tob and Tob2. Among them, Tob subfamily members, specifically Tob1/Tob and Tob2, have the most extensive C-terminal regions. As previously reported, overexpression of BTG/Tob proteins is associated with the inhibition of G1 to S-phase cell cycle progression and decreased cell proliferation in a variety of cell types. Tob subfamily proteins have similar anti-proliferative effects on cell cycle progression in cultured tumor cells. An important unresolved question is whether or not they have function in rapidly proliferating cells, such as embryonic stem cells (ESCs). Tob1 and Tob2 were expressed ubiquitously in mouse ESCs (mESCs), suggesting a possible role in early embryonic development and mESCs. To address the above question and explore the possible functions of the Tob subfamily in ESCs, we established ESCs from different genotypic knockout inner cell mass (ICM). We found that Tob1−/−, Tob2−/−, and Tob1/2 double knockout (DKO, Tob1−/− & Tob2−/−) ESCs grew faster than wild type (WT) ESCs without losing pluripotency, and we provide a possible mechanistic explanation for these observations: Tob1 and Tob2 inhibit the cell cycle via degradation of Id3 mRNA, which is a set of directly targeted genes of BMP4 signaling in mESCs that play critical roles in the maintenance of ESC properties. Together, our data suggest that BTG/Tob family protein Tob1 and Tob2 regulation cell proliferation does not compromise the basic properties of mESCs. - Highlights: • We established mouse Tob1/2 double knockout embryonic stem cells. • Tob1 and Tob2 inhibit the proliferation of ESCs without effect on pluripotency. • Tob1 and Tob2 involved in the degradation of Id3 in mESCs

  10. EFEITO DE CALDAS SOBRE Corynespora cassiicola

    Mercia Celoto

    2014-11-01

    Full Text Available The target spot (Corynespora cassiicola, main leaf disease occurred in barbados cherry in the regionof Junqueirópolis, SP, causing severe defoliates of plants. After the cleaning prune, producers apply line sulfhur in plants, for presenting fungicidal, insecticide and acaricide action. The objective of this study was to assess the effect of line sulfhur (75% and 3% - used by producers, bordeaux mixture (75% and „calda Viçosa‟ (75% on Corynespora cassiicola. The syrups were incorporate into potato-dextrose-agar or spore suspension for determination of inhibition of the mycelia growth and spores germination. Leaves barbados cherry, with symptoms of target spot, were treated with syrups. In wet champer, high humidity, was verified that sporulation occured in lesions, however the spores lost viability by presence of syrups in surface. In vitro, line sulfhur to 75% inhibited completely the mycelia growth of the fungus. Line sulfhur, Bordeaux mixture and „calda Viçosa‟ inhibited completely the spores germination. For the reasons, the use of syrups in barbados cherry, can contribute in reduction of souce of inoculum of the pathogen. A mancha alvo (Corynespora cassiicola é a principal doença da cultura da acerola, na região de Junqueirópolis, SP, causando desfolha precoce nas plantas. Após a realização da poda de limpeza anual, os produtores aplicam a calda sulfocálcica nas plantas, por apresentar ação fungicida, inseticida e acaricida. O objetivo deste trabalho foi avaliar em condições in vitro e in vivo o efeito das caldas sulfocálcica, bordalesa e Viçosa sobre Corynespora cassiicola. As caldas foram utilizadas nas seguintes concentrações: calda sulfocálcica (75 e 3% - concentração utilizada por produtores, calda Bordalesa (75% e calda Viçosa (75%. As caldas foram incorporadas em meio de batata-dextrose-ágar ou suspensão de esporos para determinação das inibições do crescimento micelial e da germinação de esporos

  11. Construcciones en yeso proyectado sobre vegetales

    Martínez, Hubert

    1986-07-01

    Full Text Available A construction method developed in early 1981 in Senegal, whose main objective is the evaluation of natural and human sources, specially those of wild vegetables and the phosphogypsum (a waste of chemical industry in Senegal. The introduction of the mechanical projection allows a noticeably growth in work performances and an improvement of the quality. The projection reduces de number of trades intervening in the work, doing away with plasters, watertightness systems and paintings, and simplifying the setting of technical installations and of carpentry. The acquisition of this projecting material is not very expensive, so, it is easy for small and medium enterprises to reach an expertness in gypsum work. Its finantial rentability is assured for a prize of the gypsum of 180% of the prize of the cement.Procedimiento de construcción desarrollado al comienzo de 1981 en el Senegal, teniendo como objetivo la valoración de las fuentes naturales y humanas, especialmente los vegetales en estado silvestre y el fosfoyeso, residuo de la industria química del Senegal. La introducción de la proyección mecánica permite aumentar sensiblemente el rendimiento del trabajo y mejorar la calidad. La proyección reduce el número de oficios que intervienen en la obra por la supresión de enlucidos, sistemas de estanquidad y pinturas sobre la gruesa obra y simplifica la colocación de las instalaciones técnicas y de carpintería. La adquisición del material de proyección, necesitando un capital relativamente modesto, se encuentra al alcance de pequeñas y medianas empresas que deseen especializarse en los trabajos de yeso. La rentabilidad financiera del procedimiento está asegurada para un precio del yeso de hasta el 180% del precio del cemento.

  12. Estudio sobre encofrados de madera modernos

    de la Peña Aznar, Juan M.

    1980-12-01

    Full Text Available The author continues the development of the subject «Modern Timber Formwork», by summing up the comparative examination —already carried out in Part III of this Study— of the different types of glued timber existing on the market. In addition, the loads and stresses allovk/able for coniferous timber and the proposal for establishing Regulations for the Timber Section of the Research and Experimental Forestry Institute of Spain are given. In part V of the author's Study, published in this article, the important subject of the glues used for joining timber, a truly vital point in order to obtain louvered timber beams which are simply glued together, is approached.

    El autor continúa el desarrollo del tema sobre «Encofrados de madera modernos», resumiendo el estudio comparativo —ya hecho en la Parte III de este Estudio— de las diferentes vigas de madera encolada existentes en el mercado dando, además, las cargas y tensiones admisibles para maderas coníferas y la propuesta de Reglamentación de la Sección de Maderas del Instituto Forestal de Investigaciones y Experiencias de España. En la parte V del Estudio del autor, publicada en este artículo, se aborda el importante tema de las colas empleadas para las uniones de madera, algo realmente vital para la obtención de vigas de madera en celosía simplemente encoladas.

  13. Sobre o campo da Psicologia Social

    Belinda Mandelbaum

    2012-03-01

    Full Text Available O campo da Psicologia Social é apresentado como território fértil, na contemporaneidade, para constituir-se como um laboratório para a produção em Ciências Humanas, uma vez que, no século XX, cada vez mais o social foi em direção ao psicológico. Neste campo, nosso embate dá-se no modo como entendemos o hífen pressuposto na integração psicossocial. A autora propõe que, entre o psicológico e o social, o hífen domina, pois ele é a própria essência relacional que é inerente a cada um dos elementos. Sugere que o modelo para entender o homem e suas circunstâncias proposto por Freud imbrica de forma indissociável o psicológico e o social, a ontogênese e a filogênese, com uma potência que teve impacto sobre todo o campo das Ciências Humanas. A Psicanálise é um instrumento hermenêutico para colaborar na elucidação dos fenômenos sociais. A autora utiliza imagens construídas por Freud e Walter Benjamin e poemas de Carlos Drummond de Andrade para fortalecer o entendimento do hífen psicossocial tanto em sua ação multidimensional quanto em sua organização.

  14. Sobre el genio de las mujeres

    Valcárcel, Amelia

    1992-11-01

    Full Text Available Not available.

    A los varones, desde Tácito a Schopenhauer, nunca les ha parecido que las verdaderas mujeres son las que tienen en casa, sino las que tienen los otros varones (los germanos, los orientales. Por su parte, Wojtyla ha hecho profesión de fe «en el genio de las mujeres», reclutando enternecidos agradecimientos como el de Macciochi. La autora del presente artículo adopta una perspectiva histórica y una actitud analítica para aclarar qué es ese genio que como genérico nos adjudican. En primer lugar, la idea de genio es romántica y va emparejada con la de destino, sobre todo en el caso de los genios colectivos. Se trata de nociones que se construyen estipulativamente con fines pragmáticos y no admiten, por definición, contraejemplos. En el caso del genio de las mujeres, los llamados «valores femeninos» que lo constituyen pertenecen al ámbito de la Siulichkeit, y su eventual convalidación en el de la Moralitiit no puede obviar el proceso consistente en la crítica y el desmarcarse de una Sittlichkeit adjudicada como estereotipia que se contrasta, no con otra estereotipia simétrica, sino con lo universal, que se solapa con el genérico masculino. La autora, por último, nos recuerda que la fabricación de este genio que, a título de colectivo, se nos atribuye a las mujeres tiene lugar a costa de la usurpación de nuestra individualidad y de la ausencia de esquemas pragmáticos de reconocimiento de la genialidad individual que pueda producirse en el genérico femenino. Ahora bien: es esta última la que las mujeres necesitamos para poder romper con las tradiciones establecidas e instituir nuevos relatos.

  15. Estudos sobre a Esquistosomose em Pernambuco, Brasil

    Aggeu Magalhães

    1940-01-01

    Full Text Available Os autores referem os resultados dos estudos sobre esquistosomose realisados, em Pernambuco, de Novembro de 1938 a Dezembro de 1939. Não se extendem em discussão, nem comentarios, tampouco, relacionam suas verificações com o que já foi relatado sobre o assunto em trabalhos nacionais e estrangeiros, pelo fato de que, não se trata de um resultado definitivo e sim de atividades que irão proseguir. Os estudos sistematicos em torno da endemia esquistosomica foram executados em duas localidades diversas pela população e pela situação geografica e ecologica. Pontezinha é uma povoação de 1200 habitantes localizada proximo a um conjunto de charcos e lagõas de agua dôce onde pululam caramujos do tipo olivaceus de Spix, e apresenta uma taxa de infestação de 21,4% para individuos do sexo masculino, e de 14,7% para os do sexo feminino. A distribuição por grupos de idade mostra que a incidencia cresce até o grupo de 16 a 20 anos de idade, quando atinge a percentagem de 37,8%, para decrescer em seguida. Em Vitoria a incidencia foi maior nos indivíduos do sexo feminino, atingindo a taxa de 41,4%, dando o sexo masculino a taxa de 36,9%. Por idade a percentagem maxima é atingida pelo grupo de 11 a 15 anos. Vitoria é uma cidade de 1500 habitantes, construida á margem do rio Tapacurá, onde se encontram numerosos caramujos do tipo centimetralis Lutz. A divergencia de incidencia corre por conta dos habitos da população e pela utilização que ela faz do rio, sendo maior em Vitoria porque a proximidade do rio facilita o uso de suas aguas para banho e serviços domesticos, condicionando este ultimo fato, a maior infestação das mulheres. O estudo da frequencia da infestação dos caramujos por cercarias de diversos trematodios, permite suspeitar uma relação inversa entre a taxa de infestação e o diametro maximo atingido pelos caramujos, parecendo este fato confirmar os trabalhos de Vianna Martins sobre a identidade dos hospedeiros

  16. As vicissitudes do "ensaio sobre o dom"

    Lygia Sigaud

    1999-10-01

    Full Text Available A partir dos anos 60, antropólogos de diferentes tradições nacionais passaram a convergir no sentido de considerar que o texto de Marcel Mauss, "Ensaio sobre o Dom", contivesse uma teoria da troca, que atribui à identificação entre a coisa dada e o espírito do doador o princípio de explicação das transações. Esta interpretação contrasta com a que tiveram os contemporâneos de Mauss, os quais resgataram do trabalho suas dimensões relativas ao direito, às obrigações e às prestações totais. Partindo desta constatação, o artigo problematiza o destino do ensaio e busca torná-lo inteligível. Para tanto examina as condições sociointelectuais que contribuíram para que se produzisse a inflexão na leitura e a consolidação de uma espécie de crença coletiva em relação ao trabalho. Através deste estudo de caso, a autora identifica mecanismos que operam no processo de construção de teorias, na conformação de representações acerca de textos e na sua consagração no âmbito da antropologia.From the 1960s, anthropologists of different national traditions came to share the view that Marcel Mauss’s text, "Essay on the Gift," contained a theory of exchange which takes the identification between the thing given and the spirit of the donor as the explanatory principle of transactions. This interpretation contrasts with that held by Mauss’s contemporaries, who lifted from the work aspects relating to law, obligations and total prestations. Starting from this fact, the article problematizes the essay’s fate and seeks to make it intelligible. To this end, it examines the socio-intellectual conditions which contributed to producing this inflection in the readings of the work and the consolidation of a kind of collective belief concerning it. Through this case study, the author identifies mechanisms which operate in the process of constructing theories, in the conformity found in representations of certain texts, and in the

  17. Marginalia: algumas notas adicionais sobre o dom

    Pierre Bourdieu

    1996-10-01

    Full Text Available Prosseguindo a análise do dom, este artigo busca ultrapassar as visões fenomenológica, estruturalista e economicista do fenômeno. Para tanto, desloca o eixo de interrogação na direção do tempo e da incerteza ligados ao intervalo entre o dom e o contradom, do agente e da ação ligados às práticas, da economia de bens simbólicos e o habitus específico que a funda. Demonstrase assim, contra todo reducionismo (à consciência, ao cálculo inconsciente ou ao cálculo propriamente dito, que a razão do dom só pode repousar sobre sua dupla verdade, seu caráter generoso e obrigatório. Por outro lado, demonstrase também que foi somente através de uma revolução simbólica, e não o desenvolvimento de uma suposta natureza humana, que uma economia da troca pôde, historicamente, se destacar da economia do dom, cuja possibilidade continua aberta, dependendo apenas dos investimentos coletivos que sejam efetuados em sua direção.Resuming an analysis of the gift, this article seeks to go beyond the phenomenological, structuralist, and economicist view of this phenomenon. It thereby shifts the trust of questioning towards the time and uncertainty linked with the interval between the gift and the counter-gift, the agent and the action linked to such practices, the economy of symbolic goods, and the specific habitus underlying it. It thus demonstrates against any and all reductionism (to consciousness, to unconcious calculation, and to calculation per se that the gift's reason can only lie in its double truth, its generous and obligatory nature, both disinterested and interested. The author also demonstrates historically that it is only through a symbolic revolution, and not the development of a supposed human nature, that an economy of exchange can stand out from the economy of the gift, whose possibility remains open, requiring collective investments in its direction.

  18. Dois estudos sobre o trabalho dos petroleiros

    Leda Leal Ferreira

    1996-06-01

    Full Text Available O presente artigo traz um resumo de dois estudos realizados na área do petróleo, o primeiro feito em uma unidade de refino e o segundo abarcando o trabalho de operadores exercendo várias funções dentro de uma refinaria e de terminais marítimos de petróleo. Nos dois casos, o ponto central foi a análise da atividade dos trabalhadores, isto é, o que eles faziam e como o faziam para dai conta das exigências de produção que lhes eram atribuídas. No entanto, os métodos utilizados foram diferentes: no primeiro caso utilizou-se a Análise Ergonômica do Trabalho (AET e no segundo, a Análise Coletiva do Trabalho (ACT. Além de apresentar os principais resultados destes estudos, a autora faz considerações sobre as diferenças entre os dois métodos e um apelo à comunidade científica para que se preocupe mais em estudar a atividade real dos trabalhadores e assim contribuir para um melhor conhecimento do que se passa no interior das unidades produtivas, evitando que sofrimentos humanos inúteis e até catástrofes industriais continuem a ocorrer.This paper describes two studies about petroleum industry. The first was developed in a refinery and the second focuses on the work of operators in various jobs within a refinery and maritime petroleum units. In both cases, the focal point was the analyses of activities, that is, what the workers do and how they do it in order to meet production demandai put on them. However, two different methods were applied in the studies. Ergonomics Work Analyses (EWA was used on the first case and Collective Work Analyses (CWA, on the second. Besides showing the main results, the author compares the two methods. She also draws the scientific community attention to the importance of studding the workers actual activity in order to contribute to a better understanding of what is going on inside production units, avoiding useless human suffering, and the still ocurring undustrial disasters.

  19. Comentarios sobre la Ley de Ordenamiento Territorial Sostenible

    Arturo J. Yglesias

    2014-04-01

    Full Text Available La denominada Ley de Ordenamiento Territorial Sostenible, no fue bien recibida en el medio jurídico. Tanto los profesores de las diferentes materias de Derecho de nuestra Facultad como las asociaciones profesionales y otros grupos e juristas de nuestro medio, formularon reservas de diverso calibre sobre el texto de la ley que van desde sus aspectos adjetivos como la terminología y redacción hasta cuestiones sustanciales como lo que ella dice sobre el régimen de la propiedad territorial y otras cuestiones vinculadas.Desde el discurso político vimos lanzar opiniones iracundas y alarmistas sobre las modificaciones que la ley estaría haciendo al régimen de la propiedad privada, sobre su supuesta inconstitucionalidad.Nosotros nos vamos a referir a la ley a sus antecedentes y de las críticas que se le hacían, en la parte que toca a nuestra materia, esto es en lo relativo al régimen de la propiedad y debemos decir, a vía de adelanto, que no vemos en ella nada que afecte el derecho de propiedad consagrado por la Constitución de la República, ni los principios generales que regulan la propiedad territorial conforme al Código Civil, conforme a la vieja ley de Centros Poblados, sus modificativas ni demás normas sobre la materia.

  20. Plumbagin, a medicinal plant (Plumbago zeylanica) - derived 1,4-naphthoquinone, inhibits growth and metastasis of human prostate cancer PC-3M-luciferase cells in an orthotopic xenograft mouse model

    Hafeez, Bilal Bin; Zhong, Weixiong; Fischer, Joseph W.; Mustafa, Ala; Shi, Xudong Daniel; Meske, Louise; Hong, Hao; Cai, Weibo; Havighurst, Thomas; Kim, KyungMann; Verma, Ajit K.

    2012-01-01

    We present here first time that Plumbagin (PL), a medicinal plant-derived 1,4-naphthoquinone, inhibits the growth and metastasis of prostate cancer (PCa) in an orthotopic xenograft mouse model. In this study, human PCa PC-3M-luciferase cells (2X106) were injected into the prostate of athymic nude mice. Three days post cell implantation, mice were treated with PL (2 mg/kg body wt. i.p five days in a week) for 8 weeks. Growth and metastasis of PC-3M-luciferase cells was examined weekly by biolu...

  1. The glycine binding site of the N-methyl-D-aspartate receptor subunit NR1: identification of novel determinants of co-agonist potentiation in the extracellular M3-M4 loop region.

    Hirai, H; Kirsch, J.; Laube, B; Betz, H.; Kuhse, J

    1996-01-01

    The N-methyl-D-aspartate (NMDA) subtype of ionotropic glutamate receptors is a heterooligomeric membrane protein composed of homologous subunits. Here, the contribution of the M3-M4 loop of the NR1 subunit to the binding of glutamate and the co-agonist glycine was investigated by site-directed mutagenesis. Substitution of the phenylalanine residues at positions 735 or 736 of the M3-M4 loop produced a 15- to 30-fold reduction in apparent glycine affinity without affecting the binding of glutam...

  2. Revisitando uma carta em português sobre Sabbatai Zvi

    Rodrigues da Silva Tavim, José Alberto

    2007-06-01

    Full Text Available The present paper deals with the Iberian context of the production-translation of a text in Portuguese language about Shabbatai Zevi, in 1666. We refer the production of similar texts and the information about the adherents in Spain, mostly in Malaga. We reflect on the various messsianic currents that crossed the different social groups in Portugal. We present a text that proves the spreading of news about Shabbatai in Portuguese Lands, and the interest kindled among the Portuguese Conversos. And we place the hypothesis that this text to the movement of Shabbatai, could have different readings, among them one that could be convenient to the conversos.

    Este artículo aborda el contexto de la producción-traducción de un texto en portugués sobre Sabetay Sebí, en 1666. Se alude a la producción de otros textos similares y a la información sobre los adeptos del movimiento en España, sobre todo en Málaga. Se reflexiona sobre las varias corrrientes mesiánicas que cruzaban los diferentes grupos sociales en Portugal. Se presenta un texto que prueba la divulgación de noticias sobre Sabetay, en tierras portuguesas y del interés desperttado entre los medios conversos sobre el movimiento. Y se plantea la hipótesis de que este texto contrario al movimiento de Sabbatai pudiera tener varias lecturas, entre ellas una que debería ser conveniente para los conversos.

  3. Efecto in vitro de aceites esenciales de tres especies de lippia sobre moniliophthora roreri (cif. y par.) evans et al., agente causante de la moniliasis del cacao (theobroma cacao l.)

    Lozada, Betty Stefany; Herrera, Laura Viviana; Perea, Janeth Aidé; Stashenko, Elena; Escobar, Patricia

    2012-01-01

    Se evaluó el efecto antifúngico in vitro de cinco aceites esenciales (AEs) (AE1, AE2, AE3, AE4 y AE5) extraídos de Lippia origanoides, L. citriodora y L. alba sobre aislados de monilia (Moniliophthora roreri) obtenidos de frutos de cacao infectados provenientes de San Vicente de Chucurí, Santander, Colombia. Las plantas de Lippia fueron colectadas en cinco localidades colombianas. Los aislados de monilia (M1, M2, M3, M4 y M5) fueron caracterizados por su morfología, germinación y crecimiento ...

  4. Perspectivas sobre la comunicación

    Naranjo Pereira, María Luisa

    2005-12-01

    Full Text Available Existen diversas teorías, enfoques y modelos de comunicación; de cada uno de ellos pueden rescatarse aspectos de gran valor para el logro de una comunicación eficaz. Este documento presenta una revisión de esos aspectos, para que se pueda comprender mejor y enriquecer uno de los procesos más importantes para el ser humano: el proceso de comunicación. Este es un ensayo en el cual se da a conocer la posición de la autora sobre el tema abordado. Se rescata el acento del enfoque humanista en la relación humana y en las etapas donde se desarrolla. A partir de la comunicación pragmática, se analizan los axiomas comunicacionales en que se fundamenta y lo que se conoce como patologías de esos axiomas. Además se revisan las principales características que distinguen la asertividad en la comunicación y las distintas formas de manipulación que la entorpecen. Del enfoque de Virginia Satir, se presentan los diversos aspectos de la comunicación, tanto funcional como disfuncional y los modelos de comunicación propuestos por esta autora. Se revisan aspectos importantes del enfoque de la comunicación educativa, tales como el control de la distancia, la voz y el cuerpo, las palabras y el situacional; así como los elementos que bloquean el proceso de comunicación y las sugerencias acerca de formas correctas de escuchar. Además, se hace referencia a la necesidad de emplear procesos educativos más holísticos y constructivistas y una comunicación-interrelación horizontal y con equidad. Each of the diverse theories, approaches, and models of communication can provide valuable elements for the attainment of effective communication. This article presents a review of those elements with the goal of providing a better understanding and enhancement of one of the most important processes for human beings: the process of communication. This essay presents the author´s position on the topic. The importance given to human relationships and the stages

  5. Datos sobre la vida sexual en dos ciudades colombianas

    Giraldo Neira, Octavio

    2012-01-01

    Uno de los temas más difíciles de investigar científicamente es el referente a la vida sexual, principalmente por la dificultad de obtener datos precisos y verídicos sobre la conducta de los individuos. Este es un tema que se trata vagamente ó solo a través de la consulta médica ó el chiste. Resulta difícil preguntar a la gente sobre su conducta sexual y más difícil aun obtener una respuesta verdadera y clara. Este informe, aunque breve, ha logrado en parte eludir estos escollos. En primer lu...

  6. Concepciones implícitas sobre el desarrollo infantil

    Vilar Martínez, C.; Blasco Cubedo, María Jesús; Hernández Blasi, Carlos

    2001-01-01

    Setenes Jornades de Foment de la Investigació de la FCHS (Any 2001-2002) Partiendo del trabajo de Martí, E. et al. (1994) “ Ideas previas de una población universitaria sobre el desarrollo infantil” hemos realizado un estudio descriptivo para identificar las concepciones implícitas del conocimiento que tienen estudiantes universitarios sobre el desarrollo infantil. La muestra estaba constituida por 111 estudiantes de la Universitat Jaume I, con una media de edad de 19 años. Median...

  7. Impacto de la enfermedad inflamatoria intestinal sobre la sexualidad

    Carrera Alonso, Elisa

    2015-01-01

    Introducción. La enfermedad inflamatoria intestinal (EII) tiene un impacto significativo en la calidad de vida de los pacientes que la padecen. Aunque parece razonable pensar que la enfermedad puede tener un impacto negativo sobre la sexualidad, existe escasa evidencia sobre este tema. Con nuestro estudio pretendemos aclarar algunas de estas incógnitas. Hipótesis y Objetivos. Se planteó si los pacientes con EII tenían una calidad de vida sexual alterada en los momentos en los que su enfermed...

  8. EL PENSAMIENTO SOCIAL SOBRE EL SUICIDIO EN ESTUDIANTES DE BACHILLERATO

    Gabriel Montes Sosa; Francisco Montes Villegas

    2009-01-01

    En este estudio se analiza desde el marco de las representaciones sociales cómo los jóvenes preparatorianos manifiestan su pensamiento social sobre el suicidio. Se aplicaron cuestionarios abiertos a 169 jóvenes, mujeres y varones de bachillerato, para conocer la ocurrencia potencial de suicidio, las situaciones a las que se debe y su definición. Los resultados muestran que los jóvenes organizan su idea sobre el suicidio a partir de varios elementos en común: problemas diversos, depresión, baj...

  9. Estudos sobre o comportamento do consumidor na SciELO

    Santana, Dhione Oliveira; Reis, Ana Alinny Cruz dos; Oliveira, Rafaela Santana

    2016-01-01

    Os estudos sobre o comportamento do consumidor têm chamado à atenção de pesquisadores de diversos países e de diversas áreas do conhecimento com objetivos dos mais variados possíveis. O presente artigo faz um estudo bibliométrico interdisciplinar sobre o comportamento do consumidor no contexto internacional (países Ibero-americanos e da África do Sul) da plataforma SciELO (Scientific Electronic Library Online). O presente estudo analisou 153 artigos científicos, como conclusão, observou-se qu...

  10. Miradas de viajeros sobre Oriente (siglos xii-xiv)

    Guglielmi, Nilda

    2016-01-01

    Hemos titulado estas páginas Miradas de viajeros sobre Oriente. En efecto, hablaremos de ciertas miradas, de modos particulares de pasar y de testimoniar. Creo que la elección del término mirada no es azarosa. Coincido en esto con lo expresado por Houari Touati al referirse al primado del ojo sobre el oído en la cultura musulmana. La mirada es fundamental para el conocimiento de la Verdad que implica también un conocimiento de sí. Dice la sura 6, Del ganado: “103. Les regards (des hommes) ne ...

  11. (I) Informe sobre conflicto violento en colombia (2011–2012)

    2014-01-01

    Las negociaciones de paz entre el gobierno nacional y las FARC avanzan de modo considerable. Al momento del cierre del presente informe –julio de 2014–, se construyó un acuerdo sobre los tres primeros puntos de la agenda –la reforma agraria, la participación política y las drogas ilícitas–. Sin duda la negociación progresa, los puntos sobre los que se trazó un acuerdo tocan dimensiones neurálgicas de la vida colectiva: el agro y su atraso histórico, la democracia y sus cierres, el narcotráfic...

  12. Banco Interamericano de Desarrollo informe sobre sostenibilidad 2010

    Banco Interamericano de Desarrollo (BID)

    2011-01-01

    Este es el sexto Informe Anual sobre Sostenibilidad del Banco. Cubre el progreso y desempeño del Banco Interamericano de Desarrollo en materia de sostenibilidad durante el año fiscal 2010. El documento proporciona información sobre las tendencias fundamentales del desarrollo y las dimensiones relacionadas con la sostenibilidad en América Latina y el Caribe. Estas tendencias afectan, tanto positiva como negativamente, la capacidad de los países para garantizar la sostenibilidad, el crecimiento...

  13. Diálogos sobre juventudes : Estudios de otras miradas

    Fornasari, María Elisa; Decca, Lorena

    2012-01-01

    Medina, Gabriel (ed.) (2009). Juventudes, territorios de identidad y tecnologías. Círculo de Reflexiones de Estudios Poscoloniales. Universidad Autónoma de la Ciudad de México. México. Los estudios sobre juventud/es han seguido diversas trayectorias y han sido abordados desde diferentes perspectivas a partir de su visibilización como problemática. El libro de Gabriel Medina parte de un diagnóstico: la existencia de importantes vacíos en los estudios sobre lo joven y la vigencia de trabajos...

  14. La perspectiva cualitativa en los estudios sobre pobreza

    Mateo Pérez, Miguel A.

    2002-01-01

    Los estudios sobre pobreza internacional han estado marcados por el enfoque cuantitativo. Sin embargo desde hace unos años los estudios cualitativos están adquiriendo una gran relevancia. Este artículo presenta las características de un estudio cualitativo sobre pobreza y género realizado en España durante los últimos tres años, estableciendo algunas líneas de trabajo básicas para el estudio de la pobreza desde la perspectiva cualitativa.

  15. Códigos y grafos sobre anillos de enteros complejos

    Martínez Fernández, María del Carmen

    2007-01-01

    RESUMEN: El objetivo de esta tesis es definir códigos perfectos sobre diferentes espacios de señal multidimensionales. Para resolver este problema, esta memoria presenta una relación original entre las Teorías de Grafos, Números y Códigos. Uno de nuestros principales resultados es la propuesta de una métrica adecuada sobre constelaciones de señal de tipo cuadrático, hexagonal y cuatro-dimensional. Esta métrica es la distancia entre los vértices de una nueva clase de grafos de Cayley definidos...

  16. La tributación estatal sobre los residuos nucleares

    Rozas Valdés, José Andrés

    2014-01-01

    Este trabajo se dedica al análisis pormenorizado de los nuevos impuestos estatales -'Impuesto de la producción de combustible nuclear gastado y residuos radiactivos resultantes de la generación de energía nucleoeléctrica' y el 'Impuesto sobre el almacenamiento del combustible nuclear gestado y residuos radiactivos en instalaciones centralizadas'- a partir de sus fundamentos, para terminar con unas consideraciones sobre su compatibilidad con las tasas equivalentes y con los impuestos autonómic...

  17. Notas sobre palmas colombianas y una del brasil

    2012-01-01

    Por mucho tiempo se ha creído que la palma de moriche de los Llanos orientales, en la región del Meta, era la Mauritia flexuosa L. f., especie típica del genero y originaria de Surinam. Al menos todas las obras botánicas publicadas por autores colombianos sobre la flora de nuestro país coinciden en la identificación anotada, incluso mi reciente trabajo sobre las Palmas de Colombia (Caldasia: 1: 22 y 32. 1940). Sin embargo, en este último trabajo, -que no es más que una nómina preliminar de la...

  18. UN PENSAMIENTO EMERGENTE SOBRE EL ARTE CONTEMPORÁNEO

    Ingrid Solana

    2009-01-01

    Este artículo trata de configurar un pensamiento emergente en torno a la reflexividad actual sobre el arte. Para ello, se analizan el stencil y el net.art como medios expresivos eminentemente autocríticos. Este ensayo recoge algunos aspectos teóricos sobre el pensamiento actual en torno al arte. Se basa, en su mayor parte, en las teorías estéticas de Gilles Deleuze y de Félix Guattari en ¿Qué es la filosofía?, aunque señala múltiples problemáticas que conciernen al pensamiento posmoderno. Las...

  19. Fiscalidad de las entidades financieras. Impuesto sobre Sociedades

    Muñoz Ortega, Julián

    2015-01-01

    Las entidades de crédito experimentan cambios de calado en su tributación directa con la reforma 2014 del Impuesto sobre Sociedades, en especial por lo que respecta a la nueva regulación de las pérdidas por deterioro y la doble imposición nacional e internacional Archivo con presentación de las novedades más relevantes a aplicar por entidades de crédito a partir de la Ley 27/2014, de 27 de noviembre, del Impuesto sobre Sociedades

  20. Miradas de adolescentes argentinos sobre la intimidad en Facebook

    Dillon, Alfredo

    2013-01-01

    A partir d'entrevistes a adolescents de diferents barris de la ciutat de Buenos Aires, aquest treball explora com es reconfigura per part d'aquests usuaris l'esfera de l'íntim en Facebook. L'objectiu va ser indagar sobre les representacions de joves de 17 i 18 anys en relació amb aquest tema. Per mitjà d'entrevistes en profunditat, es va interrogar als adolescents sobre els seus criteris per publicar continguts a la xarxa social, la proliferació de rumors en la plataforma i la necessitat de p...

  1. Santa sexualidad: concepciones de dos monjas sobre feminidad y sexualidad

    Isabel Cristina Giraldo Quijano

    2009-01-01

    En el contexto de la religión católica, la feminidad y la sexualidad femenina se configuran según dogmas y representaciones sociales específicos, en los que la imagen de Cristo -y todo lo que ello implica- actúa como elemento fundamental en la construcción de las concepciones de las mujeres consagradas a la vida religiosa sobre sex ualidad, erotismo, cuerpo. amor. Este artículo pretende explorar desde un punto de vista sociológico las concepciones de dos monjas sobre los temas mencionados....

  2. Effect of gold subsurface layer on the surface activity and segregation in Pt/Au/Pt3M (where M = 3d transition metals) alloy catalyst from first-principles

    The effect of a subsurface hetero layer (thin gold) on the activity and stability of Pt skin surface in Pt3M system (M = 3d transition metals) is investigated using the spin-polarized density functional theory calculation. First, we find that the heterometallic interaction between the Pt skin surface and the gold subsurface in Pt/Au/Pt3M system can significantly modify the electronic structure of the Pt skin surface. In particular, the local density of states projected onto the d states of Pt skin surface near the Fermi level is drastically decreased compared to the Pt/Pt/Pt3M case, leading to the reduction of the oxygen binding strength of the Pt skin surface. This modification is related to the increase of surface charge polarization of outmost Pt skin atoms by the electron transfer from the gold subsurface atoms. Furthermore, a subsurface gold layer is found to cast the energetic barrier to the segregation loss of metal atoms from the bulk (inside) region, which can enhance the durability of Pt3M based catalytic system in oxygen reduction condition at fuel cell devices. This study highlights that a gold subsurface hetero layer can provide an additional mean to tune the surface activity toward oxygen species and in turn the oxygen reduction reaction, where the utilization of geometric strain already reaches its practical limit

  3. Protocolo de kyoto: debate sobre ambiente y desarrollo en las discusiones sobre cambio climático

    Rodríguez S. Liliana

    2008-01-01

    El comportamiento climático del planeta y sus consecuencias han propiciado debates sobre los modelos de desarrollo de los países responsables del deterioro acelerado del ambiente y de los fenómenos naturales por estos días recurrentes. Sin embargo, países como Estados Unidos, luego de firmar compromisos como la Convención sobre Cambio Climático, rehúsan adquirir las obligaciones del Protocolo de Kyoto, por temor a sufrir deterioro en sus economías. En este escenario, donde la nació...

  4. "Meu prazer agora é risco": sentidos sobre sexualidade entre jovens de um grupo sobre saúde

    João Paulo Pereira Barros; Veriana de Fátima Rodrigues Colaço

    2013-01-01

    A sexualidade assumiu a condição de centralidade subjetiva pelo entrecruzamento de diversos demarcadores da Modernidade, como a legitimação do saber-verdade da ciência, a afirmação da individualidade e a institucionalização dos segmentos infanto-juvenis. Partindo dessa premissa, este artigo analisa sentidos produzidos por jovens sobre "sexualidade" em um grupo de discussão sobre saúde, com base em uma pesquisa-intervenção operacionalizada por observações-participantes e pela formação de ofici...

  5. Controversia sobre el origen del anime. Una nueva perspectiva sobre el primer dibujo animado japonés

    Horno López, Antonio

    2012-01-01

    Recientes descubrimientos sobre los orígenes de la animación japonesa muestran indicios consistentes de que la primera animación nipona en formato cinematográfico data de la década de 1900, lo que puede llegar a cuestionar algunos aspectos fundamentales que sustentan la historia de la animación tradicional. En este artículo se realiza un análisis de la documentación existente sobre las primeras animaciones japonesas, demostrando que este peculiar estilo de animación tuvo en realidad un origen...

  6. Integración de las actuales definiciones sobre función ejecutiva

    Cadavid Ruiz, Natalia; Río Pereda, Pablo del; Martínez, R.

    2007-01-01

    Cartel expositivo del curso sobre Integración de las actuales definiciones sobre función ejecutiva realizado por la Universidad de Salamanca en colaboración con la Universidad Carlos III de Madrid.

  7. Expression of regulatory CD4+CD25+ Treg,CD4+CD25higTreg cells and Foxp3 mRNA in wheezing infants and its clinical significance%CD4+CD25+、CD4+CD25hig调节性T细胞和Foxp3mRNA在婴幼儿喘息中的表达及意义

    彭力; 钟礼立; 黄寒; 厉娟; 梁沫; 李云

    2012-01-01

    Objective To evaluate the changes of CD4+ CD25+ Treg,CD4 +CD25hig Treg and Foxp3 mRNA in peripheral blood from wheezing infantsMethods Fifty-one wheezing infants and twenty healthy volunteers were included in this study. The proportion of CD4 + CD25 + Treg and CD4 + CD25hig Treg population in total T cells was evaluated by flow cytometric analysis. The expression of Foxp3 mRNA was tested by flow cytometry. Total serum IgE of wheezy infants was detected by enzyme immunoassay. Results Compared with those of healthy control, the frequency of CD4 + CD25 + Treg and CD4 + CD25hig Treg in the peripheral blood from wheezing infants showed a significant increase (6. 31 + 2. 96) % / (3.52 + 1.46) % ,P<0. 01 ,P<0. 01, respectively).The expression of CD4 + CD25+ Treg,CD4 + CD25hig Treg and Foxp3 mRNA in peripheral blood from wheezing infants with atopy burden was lower than those from non-wheezing infants(P<0. 05). The correlation analysis showed that CD4 + CD25hig Treg (r= -0. 75 , P<0.01) and Foxp3 mRNA(r= -0. 61,P<0. 01) had significantly positive relation with total serum IgE,while CD4+CD25 + Treg had significantly negative relation with total serum IgE(r=0. 36,P<0. 05). Conclusion CD4+CD25+ Treg, CD4+CD25hig Treg and Foxp3 mRNA play an important role in activation of wheezing infants.%目的 探讨婴幼儿喘息CD4+CD25+、CD4+CD25hig调节性T细胞(Treg)和叉头/翼状螺旋转录因子(Foxp3)mRNA的表达及意义.方法 采用流式细胞术检测51例首次喘息婴幼儿外周血CD4+CD25+Treg和CD4+CD25higTreg的比例,RT-PCR检测Foxp3 mRNA的表达量,酶联免疫吸附法(ELASA)检测总IgE水平,并与正常婴幼儿对照.结果 喘息婴幼儿外周血CD4+CD25+Treg、CD4+CD25higTreg占CD4+T细胞的百分比分别为(6.31+2.96)%和(3.52+1.46)%,均明显低于健康对照组(P<0.01);特应征喘息组CD4+CD25+Treg、CD4+CD25higTreg及Foxp3 mRNA表达均低于非特应征喘息组(P<0.05).喘息患儿CD4+CD25higTreg百分率及Foxp3 mRNA表达与

  8. Apuntes de José Antonio Valverde sobre dientes

    Valverde Gómez, José Antonio, 1926-2003

    2008-01-01

    Apuntes sobre dientes, que el autor utilizó para elaborar su conferencia "L'Evolution Humaine Apercue Generale", impartida en el Musèe de l'Homme de París, y patrocinada por la Société d’Anthropologie de Paris, el 21 de marzo de 1963.

  9. Apuntes de José Antonio Valverde sobre manos

    Valverde Gómez, José Antonio, 1926-2003

    2008-01-01

    Apuntes sobre manos, que el autor utilizó para elaborar su conferencia "L'Evolution Humaine Apercue Generale", impartida en el Musèe de l'Homme de París, y patrocinada por la Société d’Anthropologie de Paris, el 21 de marzo de 1963.

  10. Sobre-educación en el mercado laboral colombiano

    Jhon James Mora

    2008-12-01

    Full Text Available Este artículo analiza la sobre-educación en Colombia con datos de individuos y empresas compilados por el Servicio Nacional de Aprendizaje de Colombia en 2006, encuentra que la probabilidad de estar sobre-educado es del 14% y que depende de la movilidad entre áreas de desempeño, la experiencia, el género, el tamaño de la empresa y el nivel de educación. Los trabajadores sobre-educados ganan un 2% menos que los trabajadores correctamente educados, conforme al patrón internacional. Los resultados también muestran que la probabilidad de que los profesionales permanezcan en la misma área de desempeño aumenta con la experiencia, que cuanto mayor es la sobre-educación menor es la probabilidad de permanecer en dicha área y que los trabajadores con postgrado tienen menor probabilidad de permanecer en su área de desempeño.

  11. Aspectos sobresalientes del Informe sobre Sostenibilidad de 2012

    Banco Interamericano de Desarrollo (BID)

    2013-01-01

    Este Informe sobre Sostenibilidad abarca el progreso y desempeño del Banco Interamericano de Desarrollo en materia de sostenibilidad durante el ejercicio fiscal de 2012. En este informe nos enfocamos en el tema emergente de la gestión de recursos hídricos.

  12. Reflexiones sobre la dirección de centros

    Felpeto, Ángel

    2004-01-01

    Se presenta una reflexión sobre el modelo de dirección de centros desde la experiencia en la gestión de dos centros educativos de muy diferente tamaño y en diferentes épocas. El autor plantea la necesidad de un director líder, que encabece un proyecto educativo gestionado por un equipo.

  13. Sobre o estilo e o modo de falar e escrever

    Pedro Caruso

    2001-02-01

    Full Text Available

    Este trabalho apresenta o texto crítico de uma Lei ou Provisão de Filipe I , rei de Portugal, sobre as diversas formas de tratamento no período arcaico da língua portuguesa.

  14. Las competencias sobre cooperativas y econom??a social

    P??rez-Villalobos, M. Concepci??n

    2007-01-01

    El cap??tulo desarrolla la competencia sobre cooperativas y econom??a social de las Comunidades Aut??nomas espa??olas. El t??rmino "econom??a social" es nuevo en los Estatutos de autonom??a, aunque la constituci??n espa??ola apost?? fuerte por ??l como instituci??n que coopera al desarrollo del Estado social

  15. Reflexiones y recomendaciones sobre la poda de frutales

    Urbina Vallejo, Valero; Dalmases Mestre, Josep; Pascual Roca, Miquel

    1999-01-01

    Ante la nueva campaña de poda invernal se plantean una serie de consideraciones que pueden ser de utilidad para el fruticultor a la hora de tomar decisiones en la planificación de la poda y en la ejecución de las diferentes intervenciones que se llevan a cabo sobre el árbol.

  16. Sobre el costo de los protocolos de commitment

    Zanconi, Marcelo; Ardenghi, Jorge Raúl

    1995-01-01

    Se presenta en este trabajo, una evaluación sobre los costos de los protocolos de terminación en dos fases, relacionados con la correctitud y la serializabilidad, considerando los mecanismos de apropiación de recursos basados en locking, time-sta.mping y control optimista.

  17. Construcciones sociales sobre mujeres desde el discurso jurídico en sentencias penales sobre infanticidio

    María Eugenia Gastiazoro

    2015-12-01

    Full Text Available El infanticidio como figura penal se suprime del Código Penal Argentino en 1994, para ser una figura de homicidio agravado por el vínculo con prisión o reclusión perpetua. Diez años después de su última derogación, el caso Romina Tejerina en Jujuy generó una serie de cuestionamientos respecto de su penalización. Otro caso, que tomó estado público fue el de Eli Díaz en la ciudad de Villa Dolores en Córdoba, juzgada en el 2006, siendo (en contraposición al caso Tejerina absuelta por una mayoría compuesta solo de ciudadanos comunes (jurados. En el presente trabajo se analiza la construcción y la producción que desde el discurso jurídico se hace de las diferentes mujeres en los casos de infanticidio. A su vez, estas imágenes se comparan con las representaciones que los legisladores tuvieron en el debate del Congreso del año 2010 cuando se intentó reponer la figura. La sujeción del género centrada en la buena o mala madre, mujer, esposa, en intersección con otras dimensiones de clase social, y edad, se categoriza en el discurso de los tribunales de acuerdo a imaginarios sociales que sostienen una identidad normativa sobre estas mujeres.

  18. "Meu prazer agora é risco": sentidos sobre sexualidade entre jovens de um grupo sobre saúde

    João Paulo Pereira Barros

    2013-04-01

    Full Text Available A sexualidade assumiu a condição de centralidade subjetiva pelo entrecruzamento de diversos demarcadores da Modernidade, como a legitimação do saber-verdade da ciência, a afirmação da individualidade e a institucionalização dos segmentos infanto-juvenis. Partindo dessa premissa, este artigo analisa sentidos produzidos por jovens sobre "sexualidade" em um grupo de discussão sobre saúde, com base em uma pesquisa-intervenção operacionalizada por observações-participantes e pela formação de oficinas sobre saúde, em uma escola pública de Fortaleza. Acerca dos sentidos sobre "sexualidade", as articulações entre "sexualidade" e "risco" se sobressaíram em relação às conexões entre "sexualidade" e "prazer". Isso sugere a força de um viés educativo baseado na scientia sexualis, aludido por Michael Foucault, operando com uma visão normativa-prescritiva da sexualidade, reiterando-a, mediante o signo da "prevenção", como tecnologia de governo. Usando como ferramenta o conceito de biopolítica, aponta-se que tais questões remetem à instalação de um paradigma de "gestão do risco" na contemporaneidade.

  19. Influences of androgen on the growth of human prostate cancer PC-3M model in nude mice and the changes of the androgen receptor levels and protein kinase C activity

    Nude mice bearing transplanted human prostate cancer cell line PC-3M were treated with male sex hormone. Results demonstrated that low dose of testosterone propionate (TP) (50 mg/kg wt.) stimulated the tumor growth, and the androgen receptor (AR) levels and protein kinase C (PKC) activity were elevated in the tumor tissue. On the contrary higher dose of TP (400 mg/kg wt.) inhibited the tumor growth, and the AR level and PKC activity in tumor tissue were reduced significantly. These results showed that TP has a biphasic effect on the growth of human prostate cancer PC-3M cell line. The mechanism of the biphasic effect and its relationship between AR and PKC levels are also discussed

  20. Comparison of 3M Petrifilm Aerobic Count Plates to standard plating methodology for use with AOAC antimicrobial efficacy methods 955.14, 955.15, 964.02, and 966.04 as an alternative enumeration procedure: collaborative study.

    Nelson, Maria T; LaBudde, Robert A; Tomasino, Stephen F; Pines, Rebecca M

    2013-01-01

    A multilaboratory study was conducted to determine the equivalence of the 3M Petrifilm Aerobic Count Plate and standard plating methodology for measuring viable bacteria and spores recovered from hard-surface carriers (stainless steel and porcelain), also known as "control carrier counts," used in AOAC antimicrobial efficacy test methods. Six laboratories participated in the study in which carriers inoculated with Staphylococcus aureus, Pseudomonas aeruginosa, Salmonella enterica, and spores of Bacillus subtilis were evaluated using 3M Petrifilm Aerobic Count (AC) plates and standard plating side-by-side. The data were analyzed using a matched-pair t-test to determine the between-method effect with confidence intervals. For all test organisms pooled across all laboratories, the mean difference in log10 concentration between the standard plate count method and 3M Petrifilm AC Plates was -0.012, with a 95% confidence interval of (-0.090, +0.066), which was well within the -0.5, +0.5 interval established as the acceptance criterion. The between-carrier SD averaged 0.139; the between-replicate SD was 0.050. The carrier reproducibility, given that a single replicate per carrier is done, was estimated to be 0.148. Although differences were seen in the final concentrations of the test organisms among laboratories, there were no statistical differences between the enumeration methods. Based on the results from this study, 3M Petrifilm AC Plates are equivalent to standard plating methodology and can be used as an alternative procedure for the enumeration of test organisms used in AOAC Methods 955.14, 955.15, 964.02, and 966.04. PMID:24000742

  1. Corrosion behaviour of groundnut shell ash and silicon carbide hybrid reinforced Al-Mg-Si alloy matrix composites in 3.5% NaCl and 0.3M H2SO4 solutions

    Kenneth Kanayo ALANEME

    2015-05-01

    Full Text Available The corrosion behaviour of Al-Mg-Si alloy based composites reinforced with groundnut shell ash (GSA and silicon carbide (SiC was investigated. The aim is to assess the corrosion properties of Al-Mg-Si alloy based hybrid reinforced composites developed using different mix ratios of GSA (a cheaply processed agro waste derivative which served as partial replacement for SiC and SiC as reinforcing materials. GSA and SiC mixed in weight ratios 0:1, 1:3, 1:1, 3:1, and 1:0 were utilized to prepare 6 and 10 wt% of the reinforcing phase with Al‐Mg‐Si alloy as matrix using two‐step stir casting method. Mass loss and corrosion rate measurement was used to study the corrosion behaviour of the produced composites in 3.5% NaCl and 0.3M H2SO4 solutions. The results show that the Al-Mg-Si alloy based composites containing 6 and 10 wt% GSA and SiC in varied weight ratios were resistant to corrosion in 3.5% NaCl solution. The composites were however more susceptible to corrosion in 0.3M H2SO4 solution (in comparison with the 3.5% NaCl solution. It was noted that the Al-Mg-Si/6 wt% GSA-SiC hybrid composite grades containing GSA and SiC in weight ratio 1:3 and 3:1 respectively exhibited superior corrosion resistance in the 0.3M H2SO4 solution compared to other composites produced for this series. In the case of the Al-Mg-Si/10 wt% GSA-SiC hybrid composite grades, the corrosion resistance was relatively superior for the composites containing a greater weight ratio of GSA (75% and 100% in 0.3M H2SO4 solution.

  2. Cultivares e portaenxertos sobre o vigor de plantas de pereira europeias

    Bruno Dalazen Machado

    2013-09-01

    Full Text Available A cultura da pereira (Pyrus communis possui grande potencial de expansão no sul do Brasil devido às condições climáticas e solo. A carência de informações a respeito da(s melhor(es combinação(ões de cultivares copa de pereira europeia e portaenxertos, quanto ao aspecto vegetativo e potencial produtivo, tem limitado o cultivo. O objetivo do trabalho foi avaliar a influência de cultivares copa de pereira europeia e portaenxertos de marmeleiro (Cydonia oblonga sobre o vigor e variáveis de plantas. Os experimentos foram conduzidos em pomares comerciais da cidade de Fraiburgo, Estado de Santa Catarina, durante os ciclos de cultivo 2008/09, 09/10 e 10/11. As cultivares avaliadas foram 'Packham's Triumph', 'Santa Maria', 'Rocha' e 'Abbè Fetel' e os portaenxertos de marmeleiro EMC e Adams. O espaçamento de plantio foi de 0,3m entre plantas e 4m entre linhas. As variáveis analisadas foram: a. incremento de altura de plantas (m; b. incremento de volume de copa (m³; c. incremento de diâmetro do tronco da cv. 'copa' (mm; d. incremento de diâmetro do tronco do portaenxerto (mm; e. diferença de diâmetro do tronco entre a cultivar copa e o portaenxerto (mm; f. índice de fertilidade (no de gemas cm-1; g. massa fresca média total acumulada do material vegetativo das três podas de inverno (kg; h. diferença cumulativa entre a massa fresca e a massa seca dos ramos podados (kg. As diferentes combinações de cultivares e portaenxertos interferiram nas diferentes variáveis analisadas. As combinações Abbè Fetel e Rocha sobre marmelo Adams, foram significativamente mais vigorosas em termos de incremento de diâmetro do tronco da cultivar copa, incremento de altura de plantas, incremento de volume de copa e massa fresca média total acumulada do material vegetativo das podas de inverno dos três anos. A combinação Santa Maria sobre marmelo Adams apresentou vigor intermediário significativo de plantas de acordo com o incremento em volume

  3. EL PENSAMIENTO SOCIAL SOBRE EL SUICIDIO EN ESTUDIANTES DE BACHILLERATO

    Gabriel Montes Sosa

    2009-01-01

    Full Text Available En este estudio se analiza desde el marco de las representaciones sociales cómo los jóvenes preparatorianos manifiestan su pensamiento social sobre el suicidio. Se aplicaron cuestionarios abiertos a 169 jóvenes, mujeres y varones de bachillerato, para conocer la ocurrencia potencial de suicidio, las situaciones a las que se debe y su definición. Los resultados muestran que los jóvenes organizan su idea sobre el suicidio a partir de varios elementos en común: problemas diversos, depresión, baja autoestima y comunicación deficiente. Así, el suicidio se objetiviza en estos esquemas y se ancla en sus relaciones existentes. Para contextualizar el estudio, en la primera parte del trabajo los autores incluyen una somera descripción de los datos estadísticos más importantes respecto del suicidio en el estado de Puebla.

  4. Consenso Cultural sobre el Intento de Suicidio en Adolescentes

    Javier Eduardo García de Alba García

    2011-01-01

    Full Text Available Este estudio buscó identificar la estructura semántica del dominio cultural, el promedio de conocimiento y el grado de consenso cultural manifestado por los adolescentes sobre el intento de suicidio. Fue un estudio cualitativo de listas libres, con un muestreo propositivo no aleatorizado de 27 adolescentes entre 13 y 18 años. Los resultados evidenciaron un solo modelo semántico. En lo estructural se identificó el problema familiar como una causa importante del intento suicida; las categorías depresión y tristeza se consideraron como signos y síntomas previos a esta tentativa y no como causas. Como estrategias de prevención, se consideró recibir información mediante pláticas o establecer conversaciones sobre los problemas. Este modelo permite proponer estrategias de prevención que privilegien el núcleo familiar.

  5. Passagens sobre o moderno na cidade de Georg Simmel

    Felipe Ziotti Narita

    2013-07-01

    Full Text Available Este trabalho sugere alguns pontos para reflexão sobre o ensaio “As grandes cidades e a vida do espírito” (publicado em 1903, de Georg Simmel. Trata-se, fundamentalmente, de discutir as principais balizas teóricas e conceituais construídas pelo autor para refletir sobre a vida urbana, analisando, a partir das formas das interações sociais, as próprias especificidades da modernidade. Além do citado ensaio, este artigo discute as análises de Simmel à luz de alguns debates sociológicos de seu tempo, tomando como referência o conjunto mais amplo de seus trabalhos e interlocutores.

  6. Preguntas y consideraciones sobre anestesia en el anciano

    Evangelina Dávila Cabo de Villa

    2011-01-01

    El avance en los conocimientos sobre la fisiopatología de las enfermedades, apoyado por los adelantos científicos ha hecho posible la realización de mayor número de procedimientos quirúrgicos y con más complejidad, bajo la aplicación de métodos anestésicos y con calidad en los desempeños. El empleo juicioso de fármacos, la actualización tecnológica, la preocupación por crear mayores beneficios en los enfermos, conforman objetivos fundamentales en la anestesiología, sobre todo en ancianos. Es...

  7. Teoría sobre la estructura de capital

    Jorge Alberto Rivera Godoy

    2002-01-01

    Full Text Available Este ensayo presenta las teorías sobre la estructura de capital más difundidas y reconocidas en el mundo financiero desde los años cincuenta hasta nuestros días. Siguiendo una secuencia cronológica, se identifican los representantes y trabajos investigativos más notables, los factores analizados, las hipótesis, los escenarios y teorías económicas anexas que han servido de soporte, como también los puntos más cuestionados, sus resultados se comparan y se analiza la relación entre el endeudamiento, costo de capital y valor de la empresa. Este ensayo permite tener una idea general del estado del arte sobre la estructura de capital de las empresas.

  8. La undécima tesis de Marx sobre Feuerbach

    Federico Camino Macedo

    1993-01-01

    El artículo pretende ser una reflexión libre sobre la legitimidad de la exigencia a la filosofía formulada en la undécima tesis de Marx sobre Feuerbach. Esta, sin embargo,se refiere a un grupo determinado y a una manera de entender la filosofía, los neohegelianos llamados de izquierda y su concepción de la crítica, así como a Feuerbache inclusive a Hegel. Es en este contexto filosófico que hay que entenderla. Pese ala contraposición entre interpretación y tranformación que la tesis parece sug...

  9. Sobre inundaciones y anegamientos / Reflections on floods and flooding

    Ferrando A., Francisco J.

    2006-11-01

    Full Text Available Respecto a anegamientos e inundaciones, el autor realiza algunas precisiones conceptuales que afectan la gestión de acciones preventivas, la planificación y el ordenamiento territorial; además se ofrece una sistematización del quehacer sobre las inundaciones./ The author punctualizes the concepts regarding preventive actions and territorial planning. Also the article includes a systematized list of actions related to flood management.

  10. El buen vivir repolitiza los debates sobre el desarrollo

    Gudynas, Eduardo

    2014-01-01

    El presente texto relaciona una importante entrevista realizado por Eduardo Gydynas, Investigador en el Centro Latino Americano de Ecología Social (CLAES), de Montevideo, Uruguay, al pensador Arturo Escobar. Se trató de un abierto diálogo donde el entrevistado, comenta algunas vertientes sobre las alternativas al desarrollo y el Buen Vivir. Encuentro personal, realizado en la Universidad de North Carolina, en mayo de 2015.

  11. Indios mayas en Cuba Algunas reflexiones sobre su comercio

    2002-01-01

    Como consecuencia de la Guerra de Castas desatada en Yucatán (1847- 1855) las autoridades locales decidieron «limpiar el territorio de indios» con su venta a los hacendados cubanos faltos de mano de obra para trabajar en sus ingenios. Este artículo es una reflexión sobre los interrogantes y nuevas líneas de investigación que plantea el tema.

  12. BRIOFITAS SOBRE CARPOFOROS DE HONGOS BRYOPHYTES ON CARPOPHORES OF FUNGI

    Victor Ardiles Huerta; Felipe Osorio-Zúñiga; Elizabeth Barrera Moscoso

    2009-01-01

    Se registra el desarrollo de briófitas sobre carpóforos de hongos de estructura coriácea, leñosa y perenne. Los resultados revelan la presencia de siete especies de hepáticas fo liosas: Bazzania peruviana, Heteroscyphus integrifolius, Leiomitria elegans, Lepidozia chordulifem, Plagiochila bispinosa, Porella chilensis, Telaranea blepharostoma y dos musgos: Dicranoloma robustum e Hypnum chrysogaster. Se propone que los hongos de estas características son un apropiado sustrato para el desarrollo...

  13. Los escritos de F. Nietzsche sobre R. Wagner

    Llinares Chover, Joan B.

    2003-01-01

    Exposición general e introductoria al conjunto de textos del legado nietzscheano que hacen referencia a R. Wagner (obras, escritos, fragmentos póstumos y epistolario) con especial atención y comentarios detallados sobre el proceso de gestación y los significados de los 4 escritos que el filósofo consagró al gran compositor, en su juventud y en su madurez.

  14. Dialogos negativos anotaciones sobre el montaje de Medea Okupa

    Marcelo José Islas

    2013-09-01

    Full Text Available En este texto hablamos de dos temas: la adaptación de una obra de Eurípides, ]Medea, y su montaje en el contexto de un espacio público a partir de un trabajo de investigación en actuación sobre la poética de la tragedia.Estos dos temas, que exponemos por separado una mejor comprensión.

  15. Alguns considerandos sobre o canal do crédito

    José Alberto Fuinhas

    2002-01-01

    Com o presente artigo, tecem-se alguns considerandos sobre o método de avaliação da admissibilidade teórica do canal do crédito, baseando-nos na sua decomposição em condição de existência e condição de eficácia.

  16. Propiedades beneficiosas de los terpenos iridoides sobre la salud

    López-Carreras, Noemi; Miguel, Marta; Aleixandre, Amaya

    2012-01-01

    [ES]: Algunos componentes de los alimentos presentan actividad biológica y pueden producir un efecto beneficioso sobre la salud. Aquellos que provienen de las plantas se conocen con el nombre de fitoquímicos. Muchos de estos compuestos proceden de la condensación del isopreno y presentan la estructura propia de los terpenos. Entre ellos, destacan algunos monoterpenos bicíclicos derivados del geraniol, que se denominan iridoides. Los iridoides pueden encontrarse como estructuras abiertas...

  17. Variações sobre a porta barroca

    Roger Bastide

    2006-07-01

    Full Text Available Publicado em francês no segundo número da revista Habitat (São Paulo, 1951, com fotografias de Pierre Verger, "Variações sobre a porta barroca" é um ensaio que sintetiza linhas de força da obra de Roger Bastide. Com foco em igrejas da Bahia e de Pernambuco, o autor tece formulações iluminadoras sobre a função sociológica da porta e, por extensão, da ornamentação no barroco brasileiro.First published in French in the second issue of Habitat (São Paulo, 1951, with photographs by Pierre Verger, "Variações sobre a porta barroca" is an essay that is representative of Roger Bastide’s work in Brazil. Taking churches in Bahia and Pernambuco as an example, the author formulates challenging interpretations about the sociologial function of the door and ornaments during Baroque period in Brazil.

  18. Two Twin Judgements of Cienfuegos Dos juicios gemelos sobre Cienfuegos

    René ANDIOC

    2011-01-01

    Full Text Available Manuel eduardo de Gorostiza, in London after the constitutional triennium, signed four articles about Spanish theatre in The New Monthly Magazine using just the letter «G». At the end of that same year, 1824, an author signing with an «M», in all likelihood Prosper Mérimée, published a set of articles in Le Globe in Paris regarding the same topic. these were literal translations of those written by Gorostiza about cienfuegos, but his authorship is not mentioned.Manuel eduardo de Gorostiza, en Londres después del trienio constitucional, firmó «G» cuatro artículos sobre teatro español moderno en The New Monthly Magazine. Al final del mismo año de 1824, un tal «M», con toda probabilidad el joven Próspero Mérimée, publicó en el periódico Le Globe, de París, otros tantos sobre el propio tema, traduciendo literalmente en particular, sin mención de fuente, lo escrito por Gorostiza sobre cienfuegos.

  19. La red sobre trabajo infantil peligroso (Red Tip

    Walter Varillas

    2003-01-01

    Full Text Available En el mundo, aproximadamente 351.7 millones de niños entre 5 y 17 años realizaban algún tipo de actividad económica, de ellos 170.5 millones (48.5% realizaban algún tipo de trabajo considerado peligroso. Un alto porcentaje se encuentra en la agricultura, otros en minas, manufacturas, ladrilleras, predominantemente en la economía informal. El Convenio 138 (cobre la edad mínima de admisión en el empleo de la OIT y el Convenio 182 (sobre las peores formas de trabajo infantil, definen como trabajo infantil peligroso el que puede afectar la salud, seguridad y moralidad de los menores. Estudios específicos sobre los menores muestran su susceptibilidad particular frente a los riesgos laborales, aumentando la peligrosidad para su normal desarrollo y crecimiento: "los niños no son adultos pequeños". Los profesionales de la seguridad y salud en el trabajo pueden colaborar con los profesionales y las organizaciones especializadas en el trabajo infantil, en la definición y caracterización de lo que significa el trabajo infantil peligroso. Para ello se ha conformado la Red sobre Trabajo Infantil Peligroso (Red TIP, con la finalidad de articular estos dos espacios, orientados a eliminar el trabajo infantil peligroso y rescatar al menor y devolverle la oportunidad de sonreír ahora y en el futuro.

  20. Hegel sobre Tácito y la libertad teutona

    Valerio Rocco Lozano

    2015-09-01

    Full Text Available Una investigación sobre la presencia (así como sobre la ausencia de Tácito en Hegel es crucial para entender la posición política y filosófica de este pensador, especialmente en la época de Jena. Tras algunas consideraciones sobre el conocimiento hegeliano de la historia y la cultura romanas, se abordará un análisis de su noción de "libertad teutona": Hegel se opone tanto a la neo-romanidad de los revolucionarios franceses como al esencialismo teutómano de los conservadores alemanes (derivado fundamentalmente de un uso fuertemente ideológico de la "Germania" de Tácito, así como a las caducas instituciones imperiales. Esta doble oposición sitúa a Hegel en medio de dos corrientes políticas (e incluso de dos ejércitos en guerra y se lleva a cabo desde una actitud que puede denominarse como “mediación sin nostalgia”

  1. Sobre os conceitos de risco em Luhmann e Giddens

    Marília Luz David

    2011-11-01

    Full Text Available http://dx.doi.org/10.5007/1806-5023.2011v8n1p30 O presente artigo discute as contribuições de Anthony Giddens e Niklas Luhmann para uma melhor definição do conceito de risco, tendo em vista o rigor teórico de ambos os autores. Inicialmente é feita uma breve exposição sobre como o conceito de risco passou a ser utilizado na Modernidade e recebeu a atenção de autores das Ciências Sociais, principalmente a partir da abordagem cultura proposta por Mary Douglas. Em seguida, as definições e correspondentes argumentos sobre o conceito de risco em Luhmann e Giddens são apresentados respectivamente. Finalmente, alguns pontos de distanciamento entre os autores são discutidos e de que maneira cada um contribuiu para o debate sobre os riscos na teoria social e para o diagnóstico da Modernidade.

  2. O Impacto do Mobbing sobre o estresse no trabalho

    Tássia Donadello Ferreira Lima

    2015-07-01

    Full Text Available Definido como um conjunto de ações hostis e antiéticas, desenvolvidas no ambiente de trabalho de forma sistemática e recorrente que deixa o trabalhador em uma posição indefesa, o mobbing tem sido investigado na sua relação com a saúde e qualidade de vida do trabalhador. Neste sentido, o objetivo no presente trabalho foi (1 o desenvolvimento de três instrumentos para mensuração do mobbing, considerando sua prática por chefes, colegas e subordinados e (2 investigar o impacto do mobbing sobre o estresse no trabalho. Participaram do estudo 300 servidores de uma universidade federal do estado do Rio de Janeiro, sendo 157 homens e 143 mulheres. Os participantes preencheram os três instrumentos para mensuração do mobbing e a EET (Escala de Estresse no Trabalho. A análise fatorial exploratória dos principais eixos com rotação promax revelou uma estrutura ideal de dois fatores em cada instrumento, sendo nomeados de (1 comportamento respeitoso e (2 mobbing praticado por chefes, colegas ou subordinados, conforme o caso. A Modelagem por Equações Estruturais revelou um impacto positivo significativo do mobbing sobre o estresse no trabalho. Da mesma maneira, o comportamento respeitoso por parte de chefes, colegas e subordinados teve influência negativa significativa sobre o estresse no trabalho.

  3. Efectos del D-003 sobre patrones conductuales de roedores

    Lilia Fernández Dorta

    2005-01-01

    Full Text Available El D-003 es una mezcla de ácidos alifáticos de muy alto peso molecular purificada de la cera de la caña de azúcar con efectos hipocolesterolemizante y antiagregante plaquetario demostrados experimentalmente y en estudios clínicos Fase I y II. Los estudios experimentales y clínicos culminados han mostrado que el D-003 es seguro y bien tolerado. Sin embargo, la farmacología de la seguridad de nuevos medicamentos investiga sus efectos sobre diversos sistemas que pudieran ser blancos potenciales de toxicidad. Teniendo en cuenta que los efectos adversos relacionados con el Sistema Nervioso (SN están entre los más frecuentes para diversas áreas terapéuticas, estos estudios suelen investigar los efectos de las sustancias sobre la función y estructura del SN. La investigación de los efectos sobre patrones conductuales de roedores comúnmente representa la primera etapa de estos estudios. De acuerdo con ello, el presente estudio tuvo como objetivo investigar los efectos del tratamiento oral con D-003 (dosis únicas y repetidas sobre la actividad exploratoria, la respuesta al plato caliente, la sujeción y ejecución en varilla rotatoria y la evitación pasiva de una sola prueba de aprendizaje en ratones. Los animales se distribuyeron aleatoriamente en cinco grupos experimentales (10 animales/grupo: uno control que recibió el vehículo goma acacia-H20 y cuatro tratados con D-003 (5, 25, 100 y 400 mg/kg, respectivamente. El tratamiento oral con dosis únicas y repetidas de D-003 (400 mg/kg aumentó de forma modesta, pero significativa, la actividad exploratoria con respecto al grupo control. Sin embargo, el D-003 no modificó la respuesta en el ensayo de plato caliente, la capacidad de sujeción y ejecución motora en varilla rotatoria ni la retención del aprendizaje en el ensayo de evitación pasiva. Se necesitan estudios ulteriores que diluciden las causas por las cuales el D-003 aumenta la actividad exploratoria en ratones y que

  4. Efecto del D-004 sobre patrones conductuales en roedores

    Daisy Carbajal Quintana

    2007-01-01

    Full Text Available El D-004 es un extracto lipídico de los frutos de la palma real cubana (Roystonea regia que ha mostrado efectos protectores sobre la hyperplasia prostática (HP inducida en roedores con testosterona, pero no con dihidrotestosterona y que además, antagoniza respuestas mediadas por los ¿1-adrenoreceptores prostáticos. El D-004 mostró una modesta acción antiinflamatoria en el modelo de granuloma por algodón, modelo que se acerca más a la condición de inflamación crónica aparejada a la hiperplasia prostatica benigna (HPB en el hombre, lo que podría contribuir, en alguna medida, a su efecto en los modelos de HP. Teniendo en cuenta que los efectos adversos relacionados con el sistema nervioso (SN están entre los más frecuentes para diversas áreas terapéuticas, es obligado investigar los efectos de las sustancias sobre la función y estructura del SN. La investigación de los efectos sobre patrones conductuales de roedores comúnmente representa la primera etapa de estos estudios. El presente estudio investigó los efectos del tratamiento oral con D-004 (dosis únicas y repetidas sobre la actividad exploratoria, la respuesta al plato caliente y a las contracciones inducidas con ácido acético (200, 400 y 800 mg/kg, así como sobre la sujeción en varilla rotatoria y la fuerza de agarre en ratones (250, 500 y 1 000 mg/kg. El tratamiento oral con D-004 no modificó la actividad exploratoria, la respuesta al plato caliente y a las contracciones inducidas con ácido acético, así como la sujeción en varilla y la fuerza de agarre . El tratamiento oral con D-004 en el intervalo de dosis indicado no indujo efectos neurotóxicos, ya que no modificó ninguna de las conductas estudiadas.

  5. Investigaciones sobre la Producción del Trigo en México y Observaciones sobre su Cultivo en Colombia.

    Yepes Y. Emilio A.

    1948-04-01

    Full Text Available En seis partes he tratado de enfocar el estudio de los principales factores que gobiernan el trigo. Las cinco primeras comprenden una compilación bibliográfica sobre las investigaciones realizadas acerca de la acción de los factores históricos y económicos, climáticos, edafológicos, fitopatológicos y fitotécnicos, además de las observaciones personales sobre las condiciones especiales de dicho cultivo en México y en Colombia. La sexta parte es descriptiva del estudio experimental que adelanté para determinar la influencia combinada de los factores: agua, fertilidad del suelo, infección de las royas o polvillo, abonos, métodos y densidades de siembra y la mejor época de verificar ésta, sobre una variedad de trigo bajo las condiciones ambientales de una localidad del Valle de México.

  6. Functionalization of N2 to NH3 via direct N ≡ N bond cleavage using M(III)(NMe2)3 (M=W/Mo): A theoretical study

    Sambath Baskaran; Perumal Balu; Chinnappan Sivasankar

    2015-01-01

    Atmospheric N2 can be cleaved directly to yield metal-nitride (before proceeding to the functionalization of N of coordinated N2) and subsequently functionalized to ammonia using M(III)(NMe2)3 (M = W/Mo) as a catalyst, and suitable proton and electron sources. The calculated energies of thermodynamic and kinetic states of the various intermediates and transition states in the reaction coordinate to yield ammonia confirmed the viability of the proposed reaction pathway. Rationale of different pathways have been examined and discussed in detail. Changes in the structural features of the catalyst and some important intermediates and transition states have also been examined.

  7. Effect of the A-site cation on methane oxidation of perovskite-type (La{sub 1-x}M{sub x})CoO{sub 3} (M=Ca, Sr, and Ba)

    Taguchi, Hideki, E-mail: htaguchi@cc.okayama-u.ac.jp [Graduate School of Natural Science and Technology (Science), Okayama University, 3-1-1 Tsushima-Naka, Kita-Ku, Okayama 700-8530 (Japan); Matsu-ura, Keiko [Graduate School of Natural Science and Technology (Science), Okayama University, 3-1-1 Tsushima-Naka, Kita-Ku, Okayama 700-8530 (Japan); Takada, Masao; Hirota, Ken [Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyo-Tanabe 610-0321 (Japan)

    2012-06-15

    Perovskite-type (La{sub 1-x}M{sub x})CoO{sub 3} (M=Ca, Sr, and Ba) synthesized at 700 Degree-Sign C in air using the polymerizable complex method had a rhombohedral perovskite-type structure in the range of x{<=}0.06. The oxygen content of the samples was 2.98-2.99, and the specific surface area was 3.5-8.3 m{sup 2}/g regardless of the M ion or x. The Rietveld method indicated that the Co-O distance was also constant regardless of the M ion or x, and that the Co-O-Co angle between two CoO{sub 6} octahedra increased with an increase in the ionic radius of the M ion. The temperature corresponding to the 50% conversion (T{sub 1/2}) of CH{sub 4} oxidation was almost constant for the samples with x=0.04, while the T{sub 1/2} of the samples with x=0.06 was linearly lowered with increases in the ionic radius of the M ion. - Graphical abstract: The conversion from CH{sub 4} to CO{sub 2} and H{sub 2}O on (La{sub 0.94}M{sub 0.06})CoO{sub 3} (M=Ca, Sr, and Ba). Highlights: Black-Right-Pointing-Pointer (La{sub 1-x}M{sub x})CoO{sub 3} (M=Ca, Sr, and Ba) was synthesized using the polymerizable complex method. Black-Right-Pointing-Pointer The Co-O distance was constant regardless of the M ion or x. Black-Right-Pointing-Pointer The Co-O-Co angle increased with an increase in the ionic radius of the M ion. Black-Right-Pointing-Pointer CH{sub 4} oxidation started above 300 Degree-Sign C and finished at 700 Degree-Sign C. Black-Right-Pointing-Pointer The catalytic activity increased with increases in the ionic radius of the M ion.

  8. Synthesis and characterization of aluminum and gallium complexes of heterocyclic thiosemicarbazones. crystal structures of Me2M[SC4H3CHNNC(S)SCH3] (M=Al, Ga)

    The synthesis and characterization of the monomeric group 13 heterocyclic thiosemicarbazone complexes Me2M[SC4H3CHNNC(S)SCH3] (M=Al (2), Ga (3)) are described. Compounds 2-3 were prepared using MMe3 (M=Al, Ga) in toluene with 2-thiophenecarboxaldehyde-S-methyldithiocarbazate under anaerobic conditions. These complexes have been characterized by 1H NMR, 13C NMR, elemental analyses, and single-crystal X-ray diffraction. 2 crystallizes in the monoclinic space group P21/c with unit cell parameters a=10.2930(5) A, b=18.564 (1) A, c=7.3812(6) A, V=1347.9(2) A3, Dcalc=1.342 gcm-3 for Z=4, 9281 reflections with Ibca with unit cell parameters a=13.340(3) A, b=19.9070(5) A, c=11.3690(2) A, V=2673.88(9) A3, Dcalc=1.511 gcm-3 for Z=8, 17004 reflections with I>3σ(I), R1=0.0480 and wR2=0.0524. Compound 3 is a monomeric gallium compound with a weak interaction between the pendant thiophene and the gallium center

  9. Investigation of the R{sub 2}Te{sub 3}-M{sub 2}Te-PbTe (R = Tb, Dy; M = Cu, Ag) systems at 770 K

    Marchuk, O.V. [Department of Physical and Colloidal Chemistry, Volyn State University, Voli Ave 13, 43009 Lutsk (Ukraine); Daszkiewicz, M. [W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okolna str. 2, P.O. Box 1410, 50-950 Wroclaw (Poland); Gulay, L.D. [Department of General and Inorganic Chemistry, Volyn State University, Voli Ave 13, 43009 Lutsk (Ukraine)], E-mail: gulay@lab.univer.lutsk.ua; Olekseyuk, I.D. [Department of General and Inorganic Chemistry, Volyn State University, Voli Ave 13, 43009 Lutsk (Ukraine); Pietraszko, A. [W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okolna str. 2, P.O. Box 1410, 50-950 Wroclaw (Poland)

    2008-05-08

    The interactions between the components in the R{sub 2}Te{sub 3}-M{sub 2}Te-PbTe (R Tb, Dy; M = Cu, Ag) systems at 770 K were determined using X-ray powder diffraction. The formation of the compounds R{sub 7}Cu{sub 3}Te{sub 12} (Ho{sub 7}Cu{sub 3}Te{sub 12} structure type, space group R3-barm), RCu{sub 5}Te{sub 4} (unknown structure), RAgTe{sub 2} (ErAgTe{sub 2} structure type, space group P4-bar2{sub 1}m) and the solid solutions R{sub (2+x)/3}Cu{sub 2-x}Te{sub 2} (0 {<=} x {<=} 1) (Er{sub 2/3}Cu{sub 2}S{sub 2} structure type, space group P3-bar) in the R{sub 2}Te{sub 3}-M{sub 2}Te sections was observed. No compounds exist in the R{sub 2}Te{sub 3}-PbTe and M{sub 2}Te-PbTe sections. The formation of quaternary compounds was not observed in the investigated systems.

  10. Ternary Phosphide Ho 2Cu 6- xP 5- y, Its Crystal Structure, and REm+ n(Cu 2P 3) m(Cu 4P 2) n Relationship with Other Rhombohedral Rare-Earth Copper Phosphides

    Mozharivskyj, Yurij; Kuz'ma, Yurij B.

    2000-04-01

    Crystals of the phosphide Ho2Cu6-xP5-y (x=0.41, y=0.50) have been prepared by annealing pressed powders of the elements at 800°C for 2 weeks. The structure was determined by single-crystal methods: space group Roverline3m (No. 166), Z=3, a=3.976(1) Å, c=40.554(8) Å, R=0.045 for 243 independent reflections [F>4σ(F)]. The unit cell of Ho2Cu6-xP5-y can be built from a close packing of Ho atoms and fragments of Cu3P, with one of the fragments containing additional P atoms. It can be also considered as an intercalation of additional P atoms in the YbCu3-xP2 structure (P. Klüfers, A. Mewis, and H. U. Schuster, Z. Kristallogr. 149, 211 (1979)). The REm+n(Cu2P3)m(Cu4P2)n relationship with other rare-earth copper phosphides, having similar structural characteristics is discussed.

  11. GATA3 mRNA expression, but not mutation, associates with longer progression-free survival in ER-positive breast cancer patients treated with first-line tamoxifen for recurrent disease.

    Liu, Jingjing; Prager-van der Smissen, Wendy J C; Look, Maxime P; Sieuwerts, Anieta M; Smid, Marcel; Meijer-van Gelder, Marion E; Foekens, John A; Hollestelle, Antoinette; Martens, John W M

    2016-06-28

    In breast cancer, GATA3 mutations have been associated with a favorable prognosis and the response to neoadjuvant aromatase inhibitor treatment. Therefore, we investigated whether GATA3 mutations predict the outcome of tamoxifen treatment in the advanced setting. In a retrospective study consisting of 235 hormone-naive patients with ER-positive breast cancer who received tamoxifen as first-line treatment for recurrent disease, GATA3 mutations (in 14.0% of patients) did not significantly associate with either the overall response rate (ORR) or with the length of progression-free survival (PFS) after the start of tamoxifen therapy. Interestingly, among 148 patients for whom both mutation and mRNA expression data were available, GATA3 mutations associated with an increased expression of GATA3. However, only 23.7% of GATA3 high tumors had a mutation. Evaluation of the clinical significance of GATA3 mRNA revealed that it was associated with prolonged PFS, but not with the ORR, also in multivariate analysis. Thus, GATA3 mRNA expression, but not GATA3 mutation, is an independent predictor of prolonged PFS in ER-positive breast cancer patients who received first-line tamoxifen for recurrent disease. Besides GATA3 mutation, other mechanisms must exist that underlie increased GATA3 levels. PMID:27018307

  12. Envejecimiento en red, cauce de información sobre experiencias innovadoras

    Fernández Morales, Isabel

    2015-01-01

    Póster en que se explica el objetivo del portal Envejecimiento En Red: transferir conocimiento sobre envejecimiento y personas mayores, ofreciendo información sobre la investigación que se realiza en los campos de la Gerontología y la Geriatría y sobre recursos de utilidad para profesionales de los servicios sociales y para la sociedad en general.

  13. Confianza como consecuencia del compromiso percibido: Implicaciones sobre el aprendizaje y la innovación

    García Cruz, Joaquín; Real Fernández, Juan Carlos

    2013-01-01

    En este trabajo pretendemos alcanzar un doble objetivo. En primer lugar, estudiamos la influencia del compromiso afectivo de los empleados percibido por el directivo, tanto sobre su nivel de confianza, como sobre la capacidad de aprendizaje organizativo (CAO). Igualmente, analizamos cómo influye sobre la CAO esta predisposición del directivo a confiar en sus empleados. En segundo lugar, examinamos si el compromiso afectivo de los empleados percibido por el directivo, la confianza del directiv...

  14. Estado del arte del conocimiento sobre perifiton en Colombia

    Yimmy Montoya Moreno

    2013-12-01

    Full Text Available El perifiton es un componente de las comunidades bióticas acuáticas, su estudio es importante tanto desde la perspectiva ecológica, para comprender el funcionamiento de los ecosistemas acuáticos, como desde el punto de vista ambiental, pues su composición y estructura pueden servir como indicadores de la calidad del agua y de procesos que como la contaminación puedan estar afectando a los ecosistemas. La investigación sobre el perifiton es compleja; la definición misma de perifiton aún genera controversias. Sumado a esto, la variedad de metodologías para su estudio integral, la diversidad de arquitecturas de la matriz perifítica, la gran diversidad de ecosistemas y la ausencia de escuelas taxonómicas en el país, contribuyen a que sean pocos los trabajos que se publican sobre el tema, lo que incrementa el valor e importancia de los estudios reseñados en esta revisión. El objetivo de este artículo es dar a conocer el estado del arte en la investigación sobre el perifiton en Colombia, mediante el análisis de diferentes líneas de investigación que se han desarrollado y su grado de avance. Con este fin, se examinaron 84 trabajos a los que los autores tuvieron acceso. La mayoría de investigaciones consultadas en este trabajo (90%, corresponden al estudio de ficoperifiton, el 10% restante incluyó ambos componentes del perifiton y se encontró una dedicada exclusivamente al zooperifiton. Sólo el 10,5% de las investigaciones (8 trabajos se han dedicado al estudio taxonómico detallado, el resto de publicaciones se orientan al estudio de la estructura y dinámica de la comunidad perifítica.

  15. Dos hipótesis sobre el presidencialismo autoritario

    Soledad Loaeza

    2013-01-01

    Full Text Available El presidencialismo autoritario mexicano ha sido objeto de muchas reflexiones y opiniones. No obstante, se ha impuesto un paradigma presidencialista que privilegia la perspectiva personalizada e idiosincrática del ejercicio del poder, con un importante componente cultu- ralista. Aquí se propone, por una parte, una perspectiva histórica que contextualiza las accio- nes presidenciales en el período 1944-1970; por la otra, se parte de dos presupuestos generales. Uno, sostiene que los presidentes mexicanos actuaban bajo importantes restricciones y según los ritmos de un proceso que avanzó en episodios, más que en forma lineal o acumulativa; el otro destaca la limitación geopolítica que se deriva de la vecindad con Estados Unidos que incidió sobre las acciones presidenciales, pero también sobre el desarrollo institucional del país. La evolución del presidencialismo autoritario lleva la huella de esta influencia. Este artículo introduce elementos para la discusión de las hipótesis. La primera parte hace una revisión crítica del paradigma presidencialista; la segunda expone las restricciones que se derivaban de la vecindad con Estados Unidos. La tercera y última está dedicada a la descripción del tipo de episodios que Pueden servir para ilustrar la evolución del presidencialismo autoritario. Las dos hipótesis que aquí se presentan han guiado una investigación más amplia sobre el impacto de la Guerra Fría en México y el desarrollo del presidencialismo.

  16. Propuesta de programa educativo sobre enfermedades del cuello uterino

    Grisel Mariela Mass Basulto

    2011-10-01

    Full Text Available Fundamento: El cáncer ginecológico está entre las más frecuentes causas de muerte en la población femenina. En Cuba, el diagnóstico precoz de tal afección está entre los programas priorizados del Sistema de Salud Pública; pero también es necesario enfatizar en la prevención, que puede lograse, sobre todo, desde la atención primaria de salud, mediante la implementación de programas educativos. Objetivo: Diseñar un programa educativo sobre afecciones del cuello uterino. Métodos: Estudio descriptivo y retrospectivo, en el período comprendido del 1 de enero de 2008 al 1 de enero de 2009. Se analizaron variables como edad, escolaridad, primeras relaciones sexuales, número de partos, número de compañeros sexuales, uso de anticonceptivo, antecedentes de infecciones de transmisión sexual, hábitos tóxicos y nivel de conocimiento. Se aplicó el criterio de expertos para la validación de la propuesta educativa. Resultados: La mayoría de las mujeres tuvieron relaciones sexuales precoces, cuatro o más compañeros sexuales y eran fumadoras, mientras que el total de ellas había presentado alguna vez infecciones vaginales. El nivel de conocimiento que predominó fue regular. Conclusiones: Es evidente que en la población estudiada se concentran varios factores de riesgo para el cáncer de cuello uterino. El Programa Educativo sobre enfermedades del cuello uterino, fue validado mediante criterio de expertos, los cuales coincidieron en que tiene gran actualidad científica, congruencia interna y en que favorece el proceso de preparación de la mujer para evitar ese tipo de enfermedades.

  17. Anotaciones sobre la escritura de lo político

    Markus Schultze-Kraft

    2009-06-01

    Full Text Available Escribir bien sobre lo político es una forma de arte. Hoy, pocos escritores entienden el significado de esta premisa. Constantemente nos enfrentamos a artículos, ensayos, informes y libros mediocres y sesgados que pretenden ser “políticos” y “científicos”, pero que en realidad son expresiones de sensacionalismo y confusión ideológica o de falta de conocimiento empírico del autor, y generalmente de perspectiva.

  18. Sobre la industria ósea de Altamira

    Giménez la Rosa, Marta; Cabrera Valdés, Victoria

    1991-01-01

    Las últimas excavaciones en Altamira ofrecen cierta luz sobre el yacimiento y la probabilidad de interpretaciones que hasta el momento implicaban dificultades en cuanto a la atribución de industria. Con las dos referencias publicadas que ya existen (FREEMAN, L. G., 1988 y GONZÁLEZ ECHEGARAY, J., 1988) esta aportación se suma para completar en lo posible la visión del yacimiento desde el apartado de la industria ósea, con el estudio de la serie de piezas que se obtuvieron en ...

  19. Sobre nuevas miradas del peronismo y la prensa escrita

    Ruvituso, Clara Inés

    2008-01-01

    Antes de que los académicos llenaran las numerosas páginas que almacena el debate sobre los orígenes y desarrollo del peronismo, la prensa fue uno de los ámbitos de producción de diferentes y dicotómicas representaciones, juicios y prejuicios respecto de la naturaleza y accionar del heterogéneo movimiento político liderado por Juan D. Perón. La compilación de artículos realizada por los historiadores Raanan Rein y Claudio Panella es una significativa contribución a la historia de la intrin...

  20. Notas Sobre o Significado Político do Futebol

    Nildo Viana

    2010-08-01

    Full Text Available

    O presente artigo traz uma breve discussão na forma de notas sobre o significado político do futebol. Neste contexto, mostra o significado conservador do futebol através de vários aspectos: construção de identidade nacional, axiologia, representações ilusórias, evasão e a sua possibilidade de carregar uma potencialidade emancipadora.

  1. Bibliografía selecta sobre otros autores

    Farré Vidal, Judith

    2013-01-01

    TC/12, Patrimonio teatral clásico español. Textos e instrumentos de investigación. Programa Consolider Ingenio CSD 2009-00033, es un macroproyecto de investigación sobre el teatro clásico español que ha sido seleccionado por el programa ministerial Consolider, la punta de lanza del Plan Nacional de I+D+i. El proyecto, con 12 equipos y más de 150 investigadores de 52 universidades y centros de investigación de todo el mundo, está coordinado por el catedrático de la Universitat de València Joan...

  2. Algunas reflexiones metodológicas sobre la Historia Constitucional

    Varela Suanzes-Carpegna, Joaquín Victoriano

    2007-01-01

    En este artículo defino la Historia Constitucional como una rama de la Historia, de marcado contenido jurídico, que se ocupa de la génesis y desarrollo del Estado liberal y liberal-democrático, de acuerdo con un concepto axiológico de Constitución. Conforme a esta definición abordo algun o de los problemas que plantea el estudio histórico de las normas y de las instituciones, así como sobre todo de las doctrinas y de los conceptos constitucionales. A este respecto, insisto en la necesidad de ...

  3. Sociedad posindustrial, memoria e identidad : Sobre Marcelo Cohen

    Chiani, Miriam

    1999-01-01

    "Contra la habitual dicotomía literatura fantástica-literatura realista, reafirmada con el perfil genérico predominante en la novela latinoamericana a partir de los 70, Cohen configura en sus últimos textos -Insomnio, El oído absoluto, El fin de lo mismo, El testamento de O ’Jaral, Inolvidables veladas- un espacio urbano donde se abre una hipótesis sobre el presente en clave anticipatoria”. Al ubicar el momento hipotético en el presente, no en el futuro, la ajustada expresión que Beatriz Sarl...

  4. Percepções da elite sobre pobreza e desigualdade

    Reis Elisa P.

    2000-01-01

    O artigo analisa a visão de setores da elite brasileira sobre a pobreza e a desigualdade. Com base no argumento de que as percepções daqueles que comandam recursos estratégicos afetam diretamente a formulação e implementação de políticas sociais, e amparada por alguns estudos pioneiros realizados na Europa e nos Estados Unidos, a autora se propõe a investigar como as conseqüências da pobreza e da desigualdade são vistas fora do mundo dos pobres. A partir de dados de survey, entrevistas em pro...

  5. Debate propositivo sobre os biossimilares de enoxaparina no Brasil

    Paulo A. S. Mourão; Glauser, Bianca F.; Bruno C. Vairo; Mariana S. Pereira

    2012-01-01

    Algumas patentes das heparinas de baixo peso molecular expiraram e outras estão vencendo. Versões biossimilares desses fármacos estão disponíveis para o uso clínico em vários países. Entretanto, ainda persiste ceticismo sobre a possibilidade de se obter preparações semelhantes ao medicamento original em razão do complexo processo para gerar heparina de baixo peso molecular. Nosso laboratório analisou, nos últimos anos, amostras de enoxaparina disponíveis para uso clínico no Brasil. Já analisa...

  6. Nota sobre el archivo de la familia Pardo Gil Taboada

    Saurín de la Iglesia, María Rosa

    2007-12-01

    Full Text Available The intention of the bequest of the archives of Pardo Gil-Taboada to the Archive of the Kingdom of Galicia was that of establishing the genealogy of those who were the original source of such document. These notes attempt to sketch the profile of a noble family from they left the first traces of their existence, to well into the XX century. Going beyond the simple enumeration of individuals – “as if the nobility had no other function than the reproductive” – requires the addition of evidence about the way individuals behaved and collective traits and predispositions of the family group. Hence it is hoped that in future researchs this guide will facilitate and provide data about the formation of a family heritage and criteria on its administration, on the role played by women in the accumulation of wealth, attitudes towards life and the participacion by the nobility in the economic development of Galicia, and other aspects which may be of interest to both historians of sociology and economics.

    La donación del archivo Pardo Gil-Taboada al del Reino de Galicia requería establecer la genealogía de quienes originaron tales documentos. Estos apuntes intentan trazar el perfil de una familia hidalga desde que empezó a dejar señales de su existencia hasta bien entrado el siglo XX. Superar la simple enumeración de personas - “como si la nobleza no hubiera tenido más función que la reproductora”, en palabras de Domínguez Ortiz – suponía añadir indicaciones sobre comportamientos individuales y tendencias colectivas del grupo familiar y eso es lo que se ofrece aquí sinteticamente, como una guía de urgencia que anuncie a futuros investigadores lo que podrán hallar en esta documentación: datos sobre la formación de un patrimonio familiar y sobre los criterios de administrarlo, sobre el papel de las mujeres en la acumulación de bienes, actitudes ante la vida, participación de la hidalguía en el crecimiento económico de

  7. Reflexiones Sobre el Contrato en el Derecho Colombiano

    Vargas-Chaves, Ivan

    2015-01-01

    Spanish Abstract: En este capítulo de libro se realiza una aproximación al contrato en el derecho colombiano, a través de una guía de estudio que abarca su conceptualización doctrinal. Ello con el fin de motivar el interés para los estudiosos y estudiantes del derecho comparado iberoamericano, quienes son los destinatarios finales del libro que tiene por título: Reflexiones sobre Derecho Privado Patrimonial (Universidad de Salamanca, 2015). English Abstract: This book chapter makes an approac...

  8. Estudio sobre turbina tubular de pequeña potencia

    Saralegui, Gustavo David; Lopardo, Carlos E.; Sanmarco, Enrique Daniel; Liscia, Sergio O.; Suarez, Victor

    2011-01-01

    La energía eléctrica es una necesidad social básica, muchas veces ausente en comunidades relativamente alejadas de los principales centros urbanos. Es por ello que estudiar la posibilidad de dotar de energía a centros de escaso consumo mediante la construcción de pequeñas o medianas centrales hidroeléctricas resulta de gran interés, sobre todo donde se dispone de un recurso hídrico cercano, pasible de ser aprovechado. La necesidad de este estudio surgió en el marco de una coyuntura nacional, ...

  9. Proceedings XIV Jornadas sobre Programaci\\'on y Lenguajes

    Escobar, Santiago

    2015-01-01

    This volume contains a selection of the papers presented at the XIV Jornadas sobre Programaci\\'on y Lenguajes (PROLE 2014), held at C\\'adiz, Spain, during September 17th-19th, 2014. Previous editions of the workshop were held in Madrid (2013), Almer\\'ia (2012), A Coru\\~na (2011), Val\\'encia (2010), San Sebasti\\'an (2009), Gij\\'on (2008), Zaragoza (2007), Sitges (2006), Granada (2005), M\\'alaga (2004), Alicante (2003), El Escorial (2002), and Almagro (2001). Programming languages provide a con...

  10. Proceedings XV Jornadas sobre Programaci\\'on y Lenguajes

    Navarro, Marisa

    2015-01-01

    This volume contains a selection of the papers presented at the XV Jornadas sobre Programaci\\'on y Lenguajes (PROLE 2015), held at Santander, Spain, during September 15th-17th, 2015. Previous editions of the workshop were held in C\\'adiz (2014), Madrid (2013), Almer\\'ia (2012), A Coru\\~na (2011), Val\\`encia (2010), San Sebasti\\'an (2009), Gij\\'on (2008), Zaragoza (2007), Sitges (2006), Granada (2005), M\\'alaga (2004), Alicante (2003), El Escorial (2002), and Almagro (2001). Programming langua...

  11. Estudios sobre la vegetacion del estado de Parana (Brasil meridional)

    de Bolòs, Oriol; Cervi, Armando Carlos; Hatschbach, G. (Gert)

    1991-01-01

    BOLOS, O. DE, A.C. CERVI & G. HATSCHBACH (1991). Estudios sobre la vegetación del estado de Paraná (Brasil meridional). Collect. Bot. (Barcelona) 20: 79-182. Aportación al conocimiento de la vegetación del estado de Paraná en el Brasil meridional (Serra do Mar, Planaltos, valle del Iguacú). Se describen numerosas asociaciones vegetales agrupadas en las clases siguientes: Pistio-Eichhornietea (comunidades de cormófitas flotantes). Xyrido-Typhetea (vegetación herbácea helofítica). Polypodio-Til...

  12. Los tratados sobre temas agropecuarios en la historia de Inglaterra

    Cerrizuela, Edmundo A.

    2013-01-01

    Los antecedentes más antiguos sobre la agricultura y la ganadería de Inglaterra, se los encuentran en el Domesday Book, un gran libro preparado por los Normandos, en base a una disposición del Rey Guillermo el Conquistador, en el año 1085. Su objetivo fue conocer el estado de la economía del campo, especialmente en lo referente a: superficie de los fundos de cada agricultor, así como los cultivos agrícolas y especies de ganado en cada uno de ellos, cuantos arados tenían, cuantos obreros y esc...

  13. Ensayos sobre la sonrisa de volatilidad en mercados de opciones

    Serna Calvo, Gregorio

    2000-01-01

    La tesis comienza analizando los determinantes de la "sonrisa de volatilidad" en el mercado de opciones sobre el indice IBEX-35,obteniendose evidencia de causalidad lineal en el sentido de Granger de los costes de transacción, representados por el diferencial "bid-ask" relativo, ala forma de la sonrisa. A continuación, se propone un modelo de Black-Scholes ampliando donde la volatilidad depende del precio de ejercicio y del diferencial "bid-ask" relativo, obteniendose que dicho modelo no mejo...

  14. Sobre el amor en Proust: de Stendhal a Ortega

    Julio César Moran

    2002-01-01

    En diversos trabajos y en el desarrollo de un proyecto de investigación he sostenido las siguientes hipótesis sobre la concepción del amor en Marcel Proust: 1) se trata de una construcción ficcional, de un monólogo constituido desde la conciencia; 2) Proust recoge una tradición subjetiva propia de la época moderna que se manifiesta en diferentes artistas y pensadores; 3) se ha establecido una barrera ontológica entre la mujer amada y la mujer real que supuestamente inspira ese amor, a la que ...

  15. Sobre espacios y álgebras de funciones holomorfas

    Sevilla Peris, Pablo

    2001-01-01

    RESUMEN La Tesis Sobre espacios y ´algebras de funciones holomorfas se estructura en tres cap´ýtulos diferentes. En cada uno de ellos se aborda un problema diferente. El primer cap´ýtulo se dedica al estudio de los operadores de composici´on. La idea original es bastante sencilla y natural. Tomamos el disco unidad complejo, que denotamos D, y una funci´on holomorfa : D −! D. Con esto se define un operador f 7! f donde f : D −! C es una funci´on holomorfa. Consideramos el cas...

  16. Apuntes sobre la flora antioqueña

    H. Tomás Alberto

    2012-01-01

    En el presente artículo me propongo informar, a quienes tengan la amabilidad de leer estas líneas, sobre unos pocos de los ejemplares coleccionados y ya debidamente determinados, en especial por los señores Killip, Standly, Trelease y por el Hermano Daniel, para quienes dejo constancia de mi sincero agradecimiento. Dejo así anotadas más de 40 especies de la flora antioqueña, pequeño pero generoso aporte que pongo en manos de quienes con singular acierto levantan actualmente el grandioso ...

  17. Sobre el presente de la Arqueología Púnica

    Miquel TARRADELL

    2009-10-01

    Full Text Available Notas sobre un viaje a Túnez y Argelia podría titularse también este articulo. En efecto, la información que puede dar y las novedades que para los investigadores que trabajan en el ámbitoi arqueológico peninsular en él se contienen son debidas en gran parte a la estancia que en la primavera de 1951 he podido hacer en estos territorios, aparte de la aportación respecto a Marruecos, fruto de mis propias excavaciones.

  18. ESTUDIO SOBRE LA PERCEPCIONES Y LA EDUCACIÓN AMBIENTAL

    Raúl Calixto Flores; Lucila Herrera Reyes

    2010-01-01

    La educación ambiental como un campo emergente de construcción de nuevas propuestas, demanda de otros campos de estudio, información para comprender el origen de los comportamientos ambientales desfavorables hacia el medio ambiente. Se asume que la forma en que la persona percibe y construye los problemas ambientales, no se sustenta, necesariamente, en una forma neutral de contemplar el mundo; estas percepciones y los sesgos que las llevan a privilegiar ciertos problemas por sobre otros con d...

  19. Sobre los cambios de perspectiva en el conocimiento

    Barreo, Luz Marina

    2008-01-01

    El propósito de este artículo es explorar el significado y los alcances de los cambios de perspectiva que a veces ocurren cuando vemos las cosas desde el punto de vista teórico, al producirse un cambio de paradigma en el conocimiento, o, si las vemos desde el uso práctico de la razón, cuando se produce un cambio en la personalidad o una “conversión”. La mera cuestión sobre la posibilidad de un cambio radical de perspectiva es filosófica en un sentido profundo: sugiere la existencia de un camp...

  20. Notas sobre tres especies de Gigartinaceae (Rhodophyta del litoral peruano

    Martha Calderón

    2011-05-01

    Full Text Available La gran variabilidad morfológica de la familia Gigartinaceae ha producido constantes cambios taxonómicos en sus especies miembros. Tradicionalmente su taxonomía ha estado basada en caracteres de la morfología externa; sin embargo, recientes estudios morfológicos, respaldados con trabajos moleculares, han delimitado los géneros en base a al desarrollo del cistocarpo y de los tetrasporangios. El presente trabajo revisa y comenta sobre las estructuras morfológicas vegetativas y reproductivas de tres especies presentes en Perú: Chondracanthus chamissoi, Mazzaella denticulata y Chondrus canaliculatus.

  1. Ferropenia: impacto sobre el estado de salud mental

    Sánchez Jiménez, Apolonia

    2015-01-01

    La deficiencia de hierro y la anemia por déficit del mismo, son trastornos nutricionales y hematológicos frecuentes en el mundo y afectan a una población estimada de 2.000.000 de personas. La deficiencia de hierro tiene efectos adversos sobre la actividad de numerosas enzimas y en bebés pueden provocar alteraciones del crecimiento y del desarrollo intelectual. Los aspectos hematológicos de la deficiencia de hierro no son específicos, y con demasiada frecuencia se confunden con otras causas d...

  2. Un estudio de la IV Conferencia Mundial sobre las mujeres.

    Giménez Armentia, Pilar

    2007-01-01

    La IV Conferencia Mundial sobre las Mujeres, celebrada en la ciudad de Pekín, en septiembre de 1995 es hasta el momento la última que Naciones Unidas ha convocado para tratar específicamente los temas referidos a las mujeres. En este artículo se exponen los avances objetivos que se dieron a partir de la Conferencia, como fueron entre otros, el incremento del compromiso de la comunidad internacional en la potenciación del papel de la mujer –el llamado “empowerment”- y la integración sistemátic...

  3. Estudio sobre la presencia de Legionella en agua sanitaria

    Bonet Ivars, Verónica

    2012-01-01

    RESUM: Estudi sobre la variabilitat de la legionel·losi en funció del tamany de la mostra. L'objectiu és, d'una banda, estudiar la presència i concentracions de Legionella a diversos hospitals durant un any, i per un altre, demostrar la variabilitat de l'inòcul segons els punts de mostreig recollits en aquests hospitals. El resultat ha estat que tots els hospitals testats estaven colonitzats per Legionella encara que els inòculs han variat durant un mateix mostreig i amb diferents mostrejos e...

  4. Reflexiones sobre los medios de comunicación de masas en la Europa moderna

    Burke, Peter

    2005-01-01

    Este artículo muestra las reflexiones que Peter Burke se hace sobre los últimos estudios y la más reciente bibliografía aparecidos tras la publicación del libro De Gutenberg a Internet: Una historia social de los medios de comunicación, escrito por el propio Burke y A. Briggs sobre este tema. Sus reflexiones se centran y tratan la comunicación oral, los manuscritos, el debate Eisenstein sobre la revolución de la imprenta y sus consecuencias y la polémica Habermas sobre la esfera pública. Adem...

  5. Apuntes para un debate sobre el impacto cognoscitivo de la televisión

    Orozco-Gómez, Guillermo

    1986-01-01

    Artículo que presenta un análisis sobre el impacto cognoscitivo de la televisión y que sustenta la tesis de que la falta de conocimiento sobre el impacto negativo de este medio es consecuencia de la forma en que los investigadores han abordado el tema. Se habla sobre el libro “Mind and media. The effects of TV, videogames and computers” de Patricia Marks Greenfield, como un buen ejemplo del paradigma de investigación dominante, y porque es uno de los primeros intentos de estudio sobre los efe...

  6. Uma Análise sobre Materialismo Eliminativo a Partir do Pensamento de Nagel

    José Aparecido Pereira

    2015-01-01

    RESUMO:Fazer uma abordagem sobre a análise de Nagel sobre o materialismo eliminativo no âmbito da filosofia da mente e, com base nisso, refletir sobre a relação entre ciência e filosofia constituem o objetivo fundamental desse artigo. A nossa abordagem encontra-se organizada a partir de dois momentos. Em primeiro lugar, pretendemos discorrer sobre o materialismo eliminativo, visto que essa corrente de pensamento, no contexto da filosofia da mente, condensa e circunscreve de modo mais explícit...

  7. El punzante pasado : sobre arte, historia y memoria en el estado español

    Vicente Aliaga, Juan

    2012-01-01

    En el texto se plantea la pregunta, y se trata de ofrecer algunas respuestas, sobre la ausencia durante muchos años de trabajos artísticos surgidos en el estado español sobre el pasado histórico, y concretamente sobre el periodo de la II República, la guerra civil y la dictadura franquista. Asimismo se propone una reflexión sobre la amnesia generada en la etapa de la transición a la democracia tras la muerte de Franco. Se estudian distintas propuestas artísticas que han abordado desde finales...

  8. Socialismo y peronismo en la historiografía sobre el Partido Socialista

    Silvana Ferreyra

    2011-01-01

    Este artículo es un estado de la cuestión sobre el lugar del peronismo en la historiografía sobre el socialismo en la Argentina. Por un lado, analizamos cómo influyó el peronismo en la formulación de los interrogantes que guiaron las investigaciones sobre la historia del Partido Socialista. A tal efecto nos detendremos en los trabajos del revisionismo de izquierda, la historiografía de la transición democrática y el campo de estudio sobre la historia de la izquierda. A continuación analizamos...

  9. La ceguera como motivo en Ensayo sobre la ceguera de José Saramago e Informe sobre ciegos de Ernesto Sábato

    Fonseca, Marco Antonio

    2008-01-01

    El trabajo de investigación, El motivo de la ceguera en el Ensayo sobre la ceguera de José Saramago e Informe sobre ciegos de Ernesto Sábato, analiza desde el área y la metodología de la literatura comparada el uso del motivo literario de la ceguera en los dos textos mencionados, resaltando las similitudes y diferencias del tratamiento del motivo dentro de las dos obras y como éste sostiene una serie de obsesiones e ideas sobre el estado actual del mundo que comparten los autores de las dos n...

  10. Descontruindo mapas, revelando espacializações: reflexões sobre o uso da cartografia em estudos sobre o Brasil colonial

    Tiago Kramer de Oliveira

    2014-01-01

    O artigo discute o uso da cartografia em estudos históricos com base em obras recentes no campo da Cartografia Histórica e da História da Cartografia, em particular nas pesquisas sobre o Brasil Colonial. Na primeira parte refletimos sobre o uso de ferramentas digitais em estudos de cartografia histórica. Na segunda, discutimos algumas definições sobre a "natureza dos mapas" e suas implicações teóricas e metodológicas. Por fim, fazemos um pequeno exercício de interpretação com base em um fragm...

  11. Intervenção sobre intervenção: sobre a transferência em um trabalho social

    Fabio Azeredo

    2014-05-01

    Full Text Available Este trabalho visa a refletir sobre a relação de trabalho estabelecida entre a família assistida pelo Projeto de Reinserção Familiar (PRF, junto à Fundação para a Infância e Adolescência (FIA, e a equipe técnica de um dispositivo de atenção diária para pessoas com deficiência. Será feita uma exposição da nossa intervenção sobre a intervenção da referida equipe. O PRF destina-se a crianças e adolescentes portadores de necessidades especiais institucionalizados, realizando um acompanhamento psicossocial sistemático aos familiares dos mesmos, mediante visitas domiciliares e contatos de rede, que residem em comunidades carentes do estado do Rio de Janeiro. Um caso será relatado à luz da nossa linha de pesquisa, intitulada A pobreza como direito à exceção. O texto Intervenção sobre a transferência, do psicanalista Jacques Lacan, será utilizado para explicitar as peculiaridades de uma intervenção de orientação psicanalítica em oposição a uma intervenção de cunho assistencialista. Ademais, utilizar-se-á a discussão que o sociólogo francês Serge Paugam propõe no texto A desqualificação social, no intuito de ressaltar as principais diferenças entre a intervenção realizada por uma equipe de trabalhadores sociais e a nossa intervenção, calcada na interpretação psicanalítica, não só junto à família assistida como junto a esta equipe.

  12. Clinical observation of 3M polyester foam dressing for bedsore intervention%3M聚酯泡沫敷料用于压疮高危患者的临床疗效观察

    黄菊; 何功永

    2014-01-01

    Objective To investigate the prevention effect of 3M polyester foam dressing for patients with high risk of bedsore. Methods Made 240 cases of patients with high risk of bedsore as the object of study, 160 patients using 3M polyester foam dressing intervention as the dressing group, and collected 80 cases using the traditional method of intervention patients as control. Results the incidence of bedsore in dressing group were 11.3% (18/160), which was significantly lower than the control group 46.3% (37/80), the differences of the bedsore rate, efficacy and the total efficiency in two groups were statistically significant (P<0.05).Conclusion Using 3M polyester foam dressing in the prevention of high-risk bedsore patients, bedsore rate is low, effect is significant, which worthy of further clinical use.%目的:探讨3M聚酯泡沫敷料对压疮高危患者的预防效果。方法以240例压疮高危患者作为研究对象,160例用3M聚酯泡沫敷料进行干预为敷料组,80例采用传统方法干预患者为对照组。结果敷料组患者中压疮发生率11.3%(18/160),明显低于对照组的46.3%(37/80),2组压疮发生率、以及总有效率比较差异均有统计学意义(P<0.05)。结论对高危压疮患者应用3M聚酯泡沫敷料进行压疮预防,压疮发生率低,疗效显著,值得临床推广使用。

  13. El proyecto de reforma constitucional sobre los efectos de las sentencias del Tribunal Constitucional sobre la justicia ordinaria

    José Luis Cea Egaña

    2005-01-01

    El artículo analiza el efecto vinculante y de irradiación de las sentencias del Tribunal Constitucional sobre el conjunto del ordenamiento jurídico y de sus órganos. El autor toma partido por la consideración de la ratio decidendi del fallo como vinculante junto al dictum de la sentencia respectiva. Se plantea la necesidad que la LOC del Tribunal Constitucional explicite los efectos vinculantes de los fallos respecto de los tribunales ordinarios y especiales. Finalmente analiza...

  14. La insolvencia de Lehman Brothers en septiembre de 2008: Sobre su previsibilidad y sobre algunos "profetas a posteriori"

    Fernandez, Pablo; Aguirreamalloa, Javier

    2012-01-01

    Este documento analiza: - 106 informes de analistas sobre Lehman publicados entre enero y septiembre de 2008, - publicaciones de la CNMV - la evolución de la cotización de Lehman - la evolución del rating de la deuda de Lehman. - la evolución del CDS (Credit Default Swap) de Lehman - la evolución de la contabilidad auditada de Lehman, para tratar de dar una respuesta a la pregunta: ¿Era previsible, con la información pública de la que se disponía, predecir la quiebra de Lehman Brothers? Si hu...

  15. Efecto in vitro de aceites esenciales de tres especies de Lippia sobre Moniliophthora roreri (Cif. y Par. Evans et al., agente causante de la moniliasis del cacao (Theobroma cacao L.

    Betty Stefany Lozada

    2012-04-01

    Full Text Available Se evaluó el efecto antifúngico in vitro de cinco aceites esenciales (AEs (AE1, AE2, AE3, AE4 y AE5 extraídos de Lippia origanoides, L. citriodora y L. alba sobre aislados de monilia (Moniliophthora roreri obtenidos de frutos de cacao infectados provenientes de San Vicente de Chucurí, Santander, Colombia. Las plantas de Lippia fueron colectadas en cinco localidades colombianas. Los aislados de monilia (M1, M2, M3, M4 y M5 fueron caracterizados por su morfología, germinación y crecimiento en medios de cultivo. La actividad antifúngica de diferentes concentraciones de los AEs fue evaluada contra el aislado M2 y la cepa de M. roreri (ATCC 64239, para determinar su efecto sobre la germinación y la inhibición del crecimiento micelial. Los AEs estudiados inhibieron 100% de la germinación y del crecimiento micelial cuando fueron utilizados en concentraciones de 800 - 1000 µg/ml. Concentraciones de 200 µg/ml también mostraron efecto sobre los aislamientos fúngicos, siendo los AEs obtenidos de L. origanoides (AE2 y AE3 los más activos. Estos estaban compuestos principalmente por timol, p-cimeno, g-terpineno, acetato de timilo, carvacrol, b-mirceno, trans-b-cariofileno. Diferencias significativas (P < 0.05 sobre la susceptibilidad se observaron entre las dos cepas fúngicas estudiadas, siendo en general más susceptible el aislado M2 que la cepa ATCC. Los AEs de L. origanoides son candidatos para ser usados como posibles biofungicidas en el control de la moniliasis. Son necesarios estudios futuros orientados a determinar la actividad in vivo antifúngica de estos AEs y sus principales componentes.

  16. A etnografia das ruas: notas sobre estudar e ser estudado

    Hecht, Tobias

    2002-01-01

    Full Text Available Passeando entre as notas e as lembranças de dois períodos distintos de trabalho de campo, este ensaio "impressionista" trata da dinâmica em mudança de uma relação de pesquisa com crianças de rua. Em 1992-1993, conduzi trabalho de campo para uma dissertação sobre crianças de rua no nordeste brasileiro. Retornando à região seis anos mais tarde, descobri que a maioria das crianças estudadas apenas uma fração de geração antes estavam então mortas. Estas anotações enfocam minhas conversas com um dos sobreviventes e com quem (e sobre quem estou agora escrevendo uma biografia. Esse esforço colaborativo, voltado de certo modo a reconsiderar as implicações éticas da pesquisa com crianças que levam vidas violentas e vulneráveis, levanta uma gama de novos desafios éticos, alguns dos quais inteiramente imprevistos

  17. Puente sobre el río Severn – Inglaterra

    Editorial, Equipo

    1970-09-01

    Full Text Available The bridge described in this article has solved the increasing traffic problem in the South West of Wales. The total project involves the suspension bridge itself, a second bridge over the river Wye, and a 10 span metal viaduct, which joins both bridges, and runs over the Beachley peninsula. The suspension bridge is outstanding because of its main towers and the compact construction of the main deck, as well as for the oblique positioning of the secondary cables.El puente que se describe en el artículo ha venido a resolver el problema del tráfico creciente en el SO. del País de Gales. La obra completa comprende: el puente colgante propiamente dicho, otro puente sobre el río Wye y un viaducto metálico, de 10 tramos, que une a ambos, sobre la península de Beachley. Se trata de una solución muy interesante, por sus torres de suspensión, por la construcción compacta de su tablero y por la disposición oblicua de los cables, entre otros detalles.

  18. Precisiones sobre la luz en el Pantheon de Roma

    Oscar Linares de la Torre

    2015-04-01

    Full Text Available El Pantheon de Adriano es una de las obras más celebradas de la historia de la arquitectura. Han sido muchas las cuestiones que han cautivado a cuantos han entrado en él, pero es la luz la que ha acaparado el mayor protagonismo: una vez despojado el edificio de su originaria carga simbólica, la manifestación de su luz interior parece ser el único fin de este inmenso espacio-luz que tanto ha fascinado a arquitectos, historiadores del arte, pintores y fotógrafos. Parece difícil poder aportar nada nuevo. Consciente de ello, el autor del presente artículo sólo pretende apuntar algunas cuestiones sobre distintos aspectos de la luz en el Pantheon que considera que no han sido aún suficientemente desarrolladas: el por qué de la orientación solar y urbana del templo con respecto al eje norte-sur; la reconstrucción de la secuencia de luz y sombra que debió de darse en el recorrido original de acceso al interior del templo; la interpretación del haz de luz ocular como reminiscencia inmaterial del soporte central de las falsas cúpulas etruscas, convertida en una columna de materia sutil que, sin alcanzar nunca la vertical, incide de manera variada sobre los paramentos que conforman el interior.

  19. La undécima tesis de Marx sobre Feuerbach

    Federico Camino Macedo

    1993-06-01

    Full Text Available El artículo pretende ser una reflexión libre sobre la legitimidad de la exigencia a la filosofía formulada en la undécima tesis de Marx sobre Feuerbach. Esta, sin embargo,se refiere a un grupo determinado y a una manera de entender la filosofía, los neohegelianos llamados de izquierda y su concepción de la crítica, así como a Feuerbache inclusive a Hegel. Es en este contexto filosófico que hay que entenderla. Pese ala contraposición entre interpretación y tranformación que la tesis parece sugerir,el autor desarrolla la idea de que la unidadestá dada por el hombre que interpreta cosas,las ordena en teorías y actúa en el mundo.De allí que si se le pide a la filosofía que transforme el mundo se extralimita su poder,pero sin ella toda transformación es impensable

  20. Percepções da adolescente sobre a maternidade

    Janice Regina Rangel Porto

    2002-08-01

    Full Text Available O presente estudo tem por objetivo conhecer as percepções da mãe adolescente sobre a maternidade nesta etapa da vida; conhecer a percepção das adolescentes sobre o atendimento de saúde prestado pela equipe hospitalar; e conhecer o modo como gostariam de ser cuidadas no periodo de maternidade. Trata-se de um estudo exploratório descritivo, com abordagem qualitativa, realizado com 11 puérperas adolescentes, na Unidade de Internação Obstétrica de um hospital-ensino. As informações foram coletadas através de entrevistas semi-estruturadas e submetidas à análise de conteúdo temático. As informações obtidas revelam quatro temas: Estou grávida! Agora, é assumir...; Vivenciando o parto; Ser mãe é... e A gente se sente à vontade com os profissionais daqui. A faia destas jovens demonstra que um atendimento humanizado è possível, revelando nesta maternidade, profissionais sensibilizados e comprometidos com a melhoria da saúde materna.

  1. Apontamentos para o debate sobre o pleno emprego no Brasil

    Fernando Augusto Mansor de Mattos

    2015-08-01

    Full Text Available RESUMOEste artigo analisa a evolução dos indicadores de emprego e de desemprego na economia brasileira desde o início dos anos 2000 até os dados referentes a 2012, tomando como referências teóricas a formulação de Keynes sobre o desemprego involuntário e também os estudos sobre a dinâmica das relações entre setor formal e setor informal dos mercados de trabalho formulados por autores ligados ao Prealc. O artigo apresenta um exercício econométrico (que teve por base a função emprego de Keynes explicada pelo Princípio da Demanda Efetiva que revela que o crescimento do emprego é uma função positiva do crescimento econômico. Dados adicionais mostram que, a despeito do crescimento da ocupação e da formalização do emprego ocorrida no período, com consequente queda da taxa de desemprego para patamares historicamente baixos, a economia brasileira não conseguiu, segundo as referências teóricas adotadas, atingir o pleno emprego ao final do período analisado, devido à persistência de parcela expressiva de mão de obra subutilizada no mercado de trabalho.

  2. Movimientos correctos a la velocidad correcta sobre los ciclos correctos

    Jorge Enrique Mejía Q.

    2006-05-01

    Full Text Available El propósito del estudio fue explicar cómo una pequeña empresa colombiana compite en el mercado de telecomunicaciones de Estados Unidos. Esto fue posible usando el modelo de la Doble Hélice de Fine, que muestra los ciclos estructurales de cambios tecnológicos, sobre los que la compañía tuvo que tomar las decisiones estratégicas correctas para seguir la dinámica sectorial a la velocidad correcta. El estudio de caso consistió en una síntesis histórica sectorial y de la empresa, incluyendo hitos claves, después, la velocidad fue medida y finalmente una decisión fue recomendada para poder sobrevivir sobre el patrón de movimientos y cambios sectoriales. / The purpose of this study was to explain how a little Colombian company competes in the dynamic US telecomm market. It was possible by using Fine´s Double Helix Model that shows two structural cycles to explain technological movements, in each cycle, the company studied had to do the correct strategic decisions to follow the industrial dynamics at the right clockspeed. The case study consisted of an industrial and a company historical synthesis, including key issues, afterwards, clockspeed is measured and finally a decision is recommended to survive on the pattern of industrial changes and movements.

  3. Percepções de adolescentes sobre sua sexualidade

    Kelly Ribeiro de Freitas

    2010-01-01

    Full Text Available Es un estudio cualitativo de naturaleza descriptiva, con el objetivo de conocer las percepciones de los adolescentes sobre el desarrollo de su sexualidad. Se utilizó el enfoque del método creativo y sensible que presenta una alternativa a la investigación en enfermería a través de la dinámica de grupos de "creatividad y sensibilidad". Los participantes del estudio son 12 adolescentes de una escuela estatal de Porto Alegre. Para la recolección de los datos se hicieron cuatro talleres. El análisis siguió las etapas del método en el contexto de la pedagogía crítica de Paulo Freire. Tres temas emergieron del análisis: el adolescente: conflictos y dificultades de vida; la sexualidad para los adolescentes; y el acto sexual. Se considera importante hacer hincapié en que las percepciones de los adolescentes sobre su sexualidad surgieron en los debates y la alianza de conocimientos durante las reuniones, lo que contribuyó a la creación de un nuevo ambiente de diálogo en el contexto escolar que promovió y ayudó a la profundización del tema en un lenguaje accesible, en colaboración con los adolescentes.

  4. Efecto in vitro de aceites esenciales de tres especies de Lippia sobre Moniliophthora roreri (Cif. y Par.) Evans et al., agente causante de la moniliasis del cacao (Theobroma cacao L.) In vitro effect of essential oils of three Lippia species on Moniliophthora roreri (Cif. and Par.) Evans et al., causative agent of moniliasis of cocoa (Theobroma cacao L.)

    Betty Stefany Lozada; Laura Viviana Herrera; Janeth Aidé Perea; Elena Stashenko; Patricia Escobar

    2012-01-01

    Se evaluó el efecto antifúngico in vitro de cinco aceites esenciales (AEs) (AE1, AE2, AE3, AE4 y AE5) extraídos de Lippia origanoides, L. citriodora y L. alba sobre aislados de monilia (Moniliophthora roreri) obtenidos de frutos de cacao infectados provenientes de San Vicente de Chucurí, Santander, Colombia. Las plantas de Lippia fueron colectadas en cinco localidades colombianas. Los aislados de monilia (M1, M2, M3, M4 y M5) fueron caracterizados por su morfología, germinación y crecimiento ...

  5. Synthesis and characterization of aluminum and gallium complexes of heterocyclic thiosemicarbazones. crystal structures of Me{sub 2}M[SC{sub 4}H{sub 3}CHNNC(S)SCH{sub 3}] (M=Al, Ga)

    Kang, Young Jin; Yoo, Byung Woo; Kang, Sang Ook; Ko, Jae Jung [Korea Univ., Chochiwon (Korea, Republic of); Kang, Seung Joo [Korea National University of Education, Chongwon (Korea, Republic of)

    1998-01-01

    The synthesis and characterization of the monomeric group 13 heterocyclic thiosemicarbazone complexes Me{sub 2}M[SC{sub 4}H{sub 3}CHNNC(S)SCH{sub 3}] (M=Al (2), Ga (3)) are described. Compounds 2-3 were prepared using MMe{sub 3} (M=Al, Ga) in toluene with 2-thiophenecarboxaldehyde-S-methyldithiocarbazate under anaerobic conditions. These complexes have been characterized by {sup 1}H NMR, {sup 13}C NMR, elemental analyses, and single-crystal X-ray diffraction. 2 crystallizes in the monoclinic space group P2{sub 1}/c with unit cell parameters a=10.2930(5) A, b=18.564 (1) A, c=7.3812(6) A, V=1347.9(2) A{sup 3}, D{sub calc}=1.342 gcm{sup -3} for Z=4, 9281 reflections with I<3{sigma} (I), R1=0.0500 and wR2=0.0526. 3 crystallizes in the orthorhombic space group P{sub bca} with unit cell parameters a=13.340(3) A, b=19.9070(5) A, c=11.3690(2) A, V=2673.88(9) A{sup 3}, D{sub calc}=1.511 gcm{sup -3} for Z=8, 17004 reflections with I>3{sigma}(I), R1=0.0480 and wR2=0.0524. Compound 3 is a monomeric gallium compound with a weak interaction between the pendant thiophene and the gallium center.

  6. Considerações sobre cuidado paliativo e trabalho hospitalar: uma abordagem plural sobre o processo de trabalho de enfermagem

    Miguel de Simoni

    2003-01-01

    Full Text Available O objetivo deste artigo é apresentar o esforço de síntese dos autores sobre material de pesquisa em cuidados paliativos e bibliografia estudada. Inicialmente, apresentamos algumas considerações sobre cuidado paliativo em dois países estruturalmente distintos, Brasil e França. A discussão está centrada nas experiências de pesquisa dos autores em um serviço de AIDS no Brasil e em um serviço de Medicina Interna na França, que adotava a lógica dos cuidados paliativos e abrigava predominantemente pacientes com AIDS e câncer. Abordamos, em seguida, aspectos referidos à dor e à morte, considerando conceitos da Bioética e a dimensão relacional do cuidado em saúde. Os conceitos assinalados são os de justiça, autonomia, beneficência e não-maleficência. Concluímos, apresentando algumas possíveis contribuições da Ergonomia e da Psicodinâmica do Trabalho na área de Cuidados Paliativos, considerando especialmente a dimensão psicológica deste debate.

  7. Anotaciones sobre patología del esófago

    Ibañez Castro, H.

    2010-01-01

    Actualidad sobre el tratamiento de la patología de esta parte del tubo digestivo. El artículo quiere llamar la atención sobre puntos poco frecuentados en general: Ampula frénica - Hernia diafragmática - Estemosis extrínsecas - Megaesófago - Causas locales - Causas extrínsecas

  8. Estudio muestra importancia de conversaciones tempranas sobre el cuidado en etapa final de la vida

    Artículo sobre la importancia de hablar en forma temprana sobre el cuidado paliativo para asegurar que la atención prestada en la etapa final de la vida sea más acorde con las preferencias de los pacientes.

  9. Eflorescencias y costras sobre areniscas de Villamayor. Ensayos de laboratorio

    Madruga, F.

    1994-06-01

    Full Text Available Accelerated tests carried out in the laboratory allow us to study the crystalline material settled over the surface of the sandstones when in contact with watery solutions of different compositions. Sandstone specimens of three different textures were placed on trays containing watery solutions, putting one surface in contact with the liquid. In order to accelarate the capillary absorption, a flow of air was established over the opposite surfaces. The humidity and dryness cycles were repeated 45 times. The crystallized salts were identified by X-ray diffraction, SEM and chemical microanalysis by X-rays dispersive energy. The following results were obtained: gypsum, hexahydrite, picromerite, natrone, arcanite in saline solutions; trone, aftitalite, and presence of gypsy m in cement solutions; gypsum and syngenite in the guano solution test. These salts are analogous to those found in the superficially damaged stones of the Cathedral of Salamanca.

    Ensayos acelerados realizados en el laboratorio, permiten estudiar el material cristalino depositado sobre la superficie de areniscas cuando están en contacto con disoluciones acuosas de diferente composición. Probetas de areniscas de tres texturas diferentes se colocan sobre bandejas que contienen las disoluciones acuosas, de tal forma que una de las superficies esté en contacto con el líquido. Sobre las superficies opuestas se establece una corriente de aire que acelere la absorción capilar del líquido. Ciclos de humedad y secado se repiten 45 veces. Las sales cristalizadas se identifican por difracción de rayos-X, SEM y microanálisis químico por energía dispersiva de rayos-X. Los resultados son los siguientes; yeso, hexahidrita, picromerita, natrón y arcanita cuando se trata de disoluciones salinas; trona, aftitalita y presencia de yeso cuando la disolución es de cemento; yeso y syngenita en el ensayo con disolución de guano. Estas sales son análogas a las encontradas en las

  10. Say, Sismondi e o debate continental sobre os mercados

    Rogério Arthmar

    2009-06-01

    Full Text Available O artigo versa sobre o debate travado entre Say e Sismondi a respeito da possibilidade de saturação geral dos mercados. Na primeira seção, descreve-se o contexto histórico da Europa continental nas primeiras décadas do século 19, destacando-se as particularidades da experiência francesa de industrialização ante a liderança britânica nesse campo. A seguir, traça-se breve perfil da formação intelectual de Say a fim de apresentar sua visão sobre o funcionamento dos mercados. Na continuação, examina-se a perspectiva histórica de Sismondi em sua crítica da ortodoxia clássica, bem como sua versão para a tendência do sistema capitalista à superprodução. Nas duas últimas partes, recuperam-se os comentários recíprocos de Say e Sismondi a respeito de suas divergências teóricas sobre os limites da acumulação de capital.This paper deals with the debate happened between Say and Sismondi regarding the possibility of a general glut. The first section describes the historical context of the first decades of nineteenth century continental Europe, focusing on the French industrialization experience vis-à-vis the British leadership in this field. Next, a brief intellectual profile of the evolution of Say's thought is made in order to present his vision about the proper working of markets. After that, the historical approach used by Sismondi in his criticism of classical orthodoxy is examined, as well as his own version to the capitalistic system inner tendency towards overproduction. The last two sections retrieve the exchange between Say and Sismondi over their theoretical disagreements on the limits to capital accumulation.

  11. Estudos sobre a toxicologia da ε-caprolactama

    Marcus Vinicius Justo Bomfim

    2009-03-01

    Full Text Available A ε-caprolactama (CAP é um monômero precursor de polímeros denominados nylon 6. Esses polímeros destinam-se à produção de tapetes, vestuário e materiais plásticos tais como equipamentos, sistemas e componentes automotivos, conectores, além de embalagens plásticas. Resíduos de CAP podem migrar de embalagens plásticas de nylon 6 para os alimentos. Diante disso, foi de interesse realizar uma revisão dos efeitos relativos à exposição à CAP e o seu impacto sobre a saúde humana. Estudos epidemiológicos indicam a possibilidade da CAP causar inflamações oculares e cutâneas, além de irritações no sistema respiratório. Pode ocorrer ainda hipotensão, taquicardia, palpitações, rinorréia, ressecamento nasal, efeitos geniturinários e sobre a reprodução como distúrbios nas funções menstrual e ovariana, e complicações no parto; além de problemas neurológicos e hematológicos. Estudos com animais são consistentes com tais relatos. Os estudos de genotoxicidade in vitro e in vivo por via oral e intraperitoneal mostram em sua grande maioria, resultados negativos, bem como ausência de efeitos carcinogênicos em ratos e camundongos e sobre o desenvolvimento e reprodução em ratos e coelhos.ε -Caprolactam (CAP is a precursor monomer of nylon 6 polymers. Nylon 6 is used in the manufacture of carpets, clothes and plastic materials, such as equipment, systems and automotive components, connectors and plastic packaging. CAP residues can migrate from nylon 6 plastic packaging to foods. Given this fact, this review was realized concerning the effects of CAP exposure and its impact on human health. Epidemiological studies indicate that CAP could cause ocular, cutaneous and respiratory irritations, as well as hypotension, tachycardia, palpitations, rhinorrhea, nose dryness, neurological and blood problems, and genitourinary and reproductive effects, such as alterations in ovarian-menstrual functions and pregnancy

  12. Perspectivas sobre el proyecto de ley de salud mental

    Luciano N. García

    2009-01-01

    La legislación sobre el campo profesional y disciplinar de la psicología en la Argentina ha sido un asunto espinoso y engorroso desde la constitución misma de las carreras de psicología en el país, hace ya cincuenta años. En ese entonces, el grupo más corporativo de la psiquiatría se oponía a que los psicólogos ejerciesen psicoterapias. Los psicólogos sin embargo trataron pacientes con diversos métodos terapéuticos y consolidaron su profesión dentro de la clínica y la salud mental durante más...

  13. Apuntes para hilvanar una historia sobre las mujeres

    Teresa Fallas Arias

    2013-11-01

    Full Text Available Para abordar la historia sobre las mujeres debe considerarse que fue escrita por los varones, fuente plagada de prejuicios, de estereotipos y reproductora de la retórica androcéntrica que convirtió la diferencia sexual femenina en desigualdad e inferioridad. En esta indagación se valora la diferencia sexual como complementariedad y riqueza, pues posibilita la puesta en escena de los lenguajes y los saberes menospreciados, invisibilizados o anulados durante milenios. Pensar a la mitad de la humanidad en estos tiempos, implica rechazar la historia unívoca e idéntica que ocultó las experiencias de las mujeres, para contarlas sin intermediarios e intérpretes proclives a la historia institucionalizada.

  14. Teorías sobre cobertura con contratos de futuro

    Aragó Mananza Vicent

    2009-10-01

    Full Text Available En este trabajo se presenta una revisión de las principales teorías sobre cobertura con contratos de futuro y de los distintos métodos de estimación utilizados para determinar el ratio de cobertura óptimo. La aproximación a la cobertura más utilizada en la literatura especializada es la basada en el modelo de la teoría de carteras. No obstante, debido a sus hipótesis relacionadas con la función de utilidad del inversor y con las propiedades de la función de distribución de los rendimientos, XI han surgido nuevas propuestas (por ejemplo, las construidas a partir del coeficiente de Gini y el concepto de Lower Partial Moments, que intentan reducir dichas restricciones.

  15. Resumen sobre tecnología de suelos

    Catton, Miles D.

    1962-12-01

    Full Text Available Not availableRecoge las experiencias internacionales de laboratorio y trabajos de campo, durante más de un cuarto de siglo, sobre mezclas controladas científicamente de suelo-cemento, y revisa los conocimientos y principios científicos y tecnológicos propios del tema. Para obtener un material estructural único como el suelo-cemento, puede ser necesario emplear técnicas distintas e independientes. Su empleo incluye los pavimentos baratos para carreteras y caminos, la base y subbase para pistas de aeropuertos y carreteras, las medidas contra la erosión en malecones, diques y terraplenes, los lechos de canales y otras muchas aplicaciones de ingeniería, etc. Este resumen se limita solamente a la aplicación del cemento a suelos de grano fino, principalmente, con el fin de obtener un material estructural barato de suelo-cemento compactado para pavimentos.

  16. Sobre las bases prejurídicas del derecho ambiental

    Souvirón Morenilla, José María

    2015-01-01

    La preocupación por el ambiente, en sí mismo considerado y en su relación con el ser humano, son un fenómeno característico de nuestro tiempo. Sobre este soporte científico y la paralela reflexión ética, el ambiente se ha incorporado de modo progresivo también al campo del Derecho y la protección del ambiente se ha convertido en un título legitimador de la intervención de los poderes públicos decididamente expansivo.Dado el riesgo global que el problema ambiental hoy suscita, n...

  17. Sobre Análise do Relato Verbal

    Tunes Elizabeth

    1998-01-01

    Full Text Available Neste artigo caracterizamos descritivamente aspectos básicos de um trabalho coordenado pela Professora Carolina Bori, junto ao Ciclo Básico da Universidade Federal de São Carlos, em 1977, trabalho este que desencadeou duas vertentes de pesquisa no Brasil: uma no âmbito do ensino de Química e a outra no âmbito da pesquisa com relatos verbais em Psicologia. Descrevemos, em seguida, as principais características de cada uma dessas vertentes, em termos das questões que as originaram e dos primeiros trabalhos que daí resultaram. Finalmente, contextualizamos a contribuição da abordagem ao relato verbal assim construída para a pesquisa em psicologia, especialmente à luz de colocações de Vygotsky sobre o papel dos relatos verbais na pesquisa experimental.

  18. Sobre el allanamiento al interior de los grupos societarios

    Cubillos Garzón, Camilo

    2014-01-01

    Comprender cómo una teoría jurídica societaria afecta el desarrollo de un fenómeno económico es una tarea compleja, pero si además se considera que esta anomalía se inmiscuye en otro suceso mercantil, como es el de una situación patrimonial de hecho, el asunto aparece aún más confuso; comenzando de esta manera, y a partir de tales supuestos, es un deber concretar el marco sobre el cual girará esta investigación. Los partícipes de una economía perciben separadamente las políticas de crecimi...

  19. Los procesos ante los juzgados de violencia sobre la mujer

    Laguna Pontanilla, Gonzalo

    2015-01-01

    La entrada en vigor de la "Ley Organica 1/2004, de 28 de diciembre, de Medidas de Protección integral contra la Violencia de Género, generó desde su origen graves críticas, a nivel ideológico, dogmático y doctrinal, y una compleja y heterogénea problemática en la práctica judicial que cristalizó en diversas cuestiones interpretativas que plantea la aplicación práctica de la Ley Integral a diario en los proxcesos seguidos ante los juzgados de Violencia sobre la Mujer. La tesis aborda la neces...

  20. Personajes: notas sobre Deleuze y la novela modernista

    Juan Carlos Gorlier

    2012-12-01

    Full Text Available Las contribuciones de Deleuze revelan nuevas dimensiones en la literatura modernista. Para muchos escritores modernistas, lo que la conciencia puede captar es menos relevante que lo que afecta al cuerpo; esta convicción se plasma en la aparición de personajes difíciles de clasificar. La primera sección del ensayo explora la relación entre acontecimiento y personaje; la segunda indaga las reflexiones de Nietzsche sobre Zaratustra; la tercera está dedicada a la noción de personaje original en Melville; la cuarta presenta la idea de los personajes como fuerzas impersonales en Lawrence; y la última la concepción del personaje ausente en Woolf.