917 resultados para Bollinger, Lee C., 1946-
Resumo:
Stejnulxin, a novel snake C-type lectin-like protein with potent platelet activating activity, was purified and characterized from Trimeresurus stejnegeri venom. Under non-reducing conditions, it migrated on a SDS-polyacrylamide gel with an apparent molecular mass of 120 kDa. On reduction, it separated into three polypeptide subunits with apparent molecular masses of 16 kDa (alpha), 20 kDa (beta1) and 22 kDa (beta2), respectively. The complete amino acid sequences of its subunits were deduced from cloned cDNAs. The N-terminal sequencing and cDNA cloning indicated that beta1 and beta2 subunits of stejnulxin have identical amino acid sequences and each contains two N-glycosylation sites. Accordingly, the molecular mass difference between beta1 and beta2 is caused by glycosylation heterogenity. The subunit amino acid sequences of stejnulxin are similar to those of convulxin, with sequence identities of 52.6% and 66.4% for the alpha and beta, respectively. Stejnulxin induced human platelet aggregation in a dose-dependent manner. Antibodies against alphaIIbbeta3 inhibited the aggregation response to stejnulxin, indicating that activation of alphaIIbbeta3 and binding of fibrinogen are involved in stejnulxin-induced platelet aggregation. Antibodies against GPIbalpha or alpha2beta1 as well as echicetin or rhodocetin had no significant effect on stejnulxin-induced platelet aggregation. However, platelet activation induced by stejnulxin was blocked by anti-GPVI antibodies. In addition, stejnulxin induced a tyrosine phosphorylation profile in platelets that resembled that produced by convulxin. Biotinylated stejnulxin bound specifically to platelet membrane GPVI.
René Sand (1877-1953) and His Contribution to International Social Work, IASSW-President 1946 – 1953
Resumo:
The extraordinary significance of the life and work of René Sand lies in his central position as a mediator, promoter and coordinator of social work on an increasingly international level during the interwar-period and it can hardly be overestimated. To approach the achievements of Sand’s life and work you have to work archaeologically as he does not seem to have left any traces in the literature on social history. In Germany, even within the field of social work his name is hardly known. His biographical sketch and his importance for the development of the profession of social work have fallen into oblivion. The situation is a little different in the French-speaking countries where a biography has been published (compare Anciaux 1988a, b, c) which contains a detailed record of Sand’s writings. Altogether this lack of interest is regrettable because it doesn’t consider that René Sand is exemplary and in some parts fundamental to the emergence of professional social work in the 1920s in Belgium and Europe. Professional social work was established by a consequent international orientation and an emancipation from neighbouring fields such as social medicine and hygiene. Therefore it is a rewarding task to draw attention to this pioneer of social work and make the public appreciate his work. I want to emphasize explicitly that in this portrait Sand’s achievements concerning social work will be the main focus, even if this is an inevitable reduction of his accomplishments in the field of medicine and social medicine.
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von F. Th. Wangenheim
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The purpose of this research is to develop a new statistical method to determine the minimum set of rows (R) in a R x C contingency table of discrete data that explains the dependence of observations. The statistical power of the method will be empirically determined by computer simulation to judge its efficiency over the presently existing methods. The method will be applied to data on DNA fragment length variation at six VNTR loci in over 72 populations from five major racial groups of human (total sample size is over 15,000 individuals; each sample having at least 50 individuals). DNA fragment lengths grouped in bins will form the basis of studying inter-population DNA variation within the racial groups are significant, will provide a rigorous re-binning procedure for forensic computation of DNA profile frequencies that takes into account intra-racial DNA variation among populations. ^
Resumo:
La importancia de las labores de las mujeres del mundo rural había sido entendida en términos de arraigo familiar y mayor productividad desde los tiempos del Centenario y enfatizada por el Estado intervencionista desde 1930. El Estado peronista (1946-1955) interpela a las mujeres vinculándolas a los hogares, a la educación de los hijos y a la economía doméstica, profundizando estas pautas culturales anteriores. La Revolución Libertadora (1955-1958) provoca la ruptura de la hegemonía y promueve cambios en la política económica que favorecen a la elite agropecuaria y a la modernización del sistema productivo. El Estado desarrollista (1958-1962) promueve la integración regional y la tecnificación del campo, generando a la vez, una apertura al ingreso de capital extranjero. La dependencia de la economía argentina del mundo rural sustenta, para estos gobiernos, el desarrollo industrial. Estos cambios políticos y económicos en relación al agro permiten preguntar sobre el espacio de las mujeres del ámbito rural y su vida cotidiana en estos discursos. Se pretende, entonces, avanzar sobre las diversas reconstrucciones discursivas de los roles y el trabajo de las mujeres del campo argentino. En este sentido, este trabajo se plantea estudiar cuáles son los roles de las mujeres de campo que se (re)producen en las revistas y libros de lectura desde 1946 a 1962 como legitimados en el orden social de los discursos.
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Este artículo se propone analizar la concepción médica respecto de aquellas identidades transgresoras de los roles de género asignados socialmente y que no se ajustaban a un modelo dual y heteronormativo, durante los dos primeros gobiernos peronistas. Nos basamos en el análisis de artículos de la revista La Semana Médica. Esta fuente nos ha permitido contemplar cómo la medicina constituida como campo de poder y de saber reforzó el discurso familiarista que se difundía desde el estado. Sin embargo, el poder médico fue constantemente cuestionado por las demás disciplinas, y por las personas que fueron objeto de la inspección médica
Resumo:
Con la llegada del peronismo al gobierno se produjeron reformas en relación a la organización y funcionamiento del sistema de salud pública. Pero más allá de sus éxitos o fracasos, el cuidado y la preservación de la salud de la población, incluyendo la de las zonas más apartadas y atrasadas del interior del país, fue una de las metas principales del gobierno de Juan Domingo Perón. A partir de esto, nuestro objetivo central es estudiar las políticas sanitarias en los municipios de la provincia de Mendoza durante el período 1946-1955, atendiendo a dos aspectos: el primero de ellos, relacionado con el rol del gobierno nacional y provincial en la ejecución de esta política pública, y el segundo, con los resultados, logros y efectos de la misma en los departamentos mendocinos. Este estudio empírico, en el cual se cotejan programas con resultados, permitirá conocer entonces el real cumplimiento de los objetivos establecidos por el peronismo.