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Search Results: 1 - 10 of 223979 matches for " R; Videla Dorna "
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The Effect of hCG Treatment on Follicular Characteristics and Luteal Function in Seasonally Anestrous Ewes Lambs
R. Catalano,M. Teruel,C. Gonzalez,S. Williams,I. Videla Dorna,S. Callejas
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2012.2091.2096
Abstract: The objective of this research is to study the effect of hCG on follicular and luteal characteristics in anestrous ewe lambs. About 91 Corriedale ewe lambs of 8 months of age were used during non breeding season. Three experiments were performed: hCG was administered 36 h after sponge removal (Experiment 1) at day 13.5 after sponge removal (Experiment 2) and in both time (Experiment 3). Follicular characteristics, ovulation day, Corpus Luteum area (CLa) and Plasmatic Concentration of Progesterone (PCP) were not affected by 150 or 300 IU of hCG administered at the beginning of the estrous cycle (p>0.05). The CLa after the administration of 300 IU of hCG at day 13.5 was significantly higher than that in h150 and control groups (p<0.05). Furthermore, there was an effect of treatment by day interaction in the PCP (p<0.05). When the hCG was administered at the beginning of the estrus cycle and during the luteal phase, treatment by day interactions for the CLa and PCP were observed (p<0.05). The effect of hCG on luteal function of saeasonally anestrous ewes lambs is dose and time of administration dependent.
Efecto de un dispositivo intravaginal con progesterona sobre la actividad ovárica en yeguas cíclicas Effect of an intravaginal device containing progesterone on the ovarian activity in cyclic mares
C.P Bianchi,R Guerrero,I Videla Dorna,M.V Cavilla
InVet , 2011,
Abstract: Se evaluó el efecto de un dispositivo intravaginal conteniendo progesterona más una inyección de prostaglandina F2α (PGF2α) al retiro del dispositivo y la aplicación de Gonadotrofina Coriónica humana (hCG) al día 5 post retiro sobre la actividad ovárica en yeguas cíclicas. Adicionalmente, se evaluaron los porcentajes de pre ez. Los animales se dividieron en: grupo T: animales tratados a partir del día 0 con dispositivo intravaginal conteniendo 1,38 g de progesterona durante 8 días más aplicación de PGF2α al retiro y al 5to día hCG a aquellos animales con un folículo ≥ 30 mm y grupo C: animales controles; sin tratamiento. Al 4to día post retiro los animales fueron puestos en servicio por monta natural en manada. El dispositivo indujo concentraciones plasmáticas de progesterona superiores a 2,1 ng ml-1 durante su exposición. En el 83,4% de los animales del grupo T (25/30) se observó la presencia de un folículo ovulatorio entre el retiro del dispositivo y el día de inyección de hCG: el 68% (17/25) ovuló como respuesta a la hCG, mientras que el 32% (8/25) lo hizo espontáneamente en los primeros 4 días post retiro. En los animales controles se registraron ovulaciones aleatoriamente. Al día 45 del retiro, la ecografía demostró un mayor porcentaje de yeguas pre adas en los primeros días post tratamiento en el grupo T, aunque las diferencias no fueron estadísticamente significativas. Se concluye que la utilización de un dispositivo intravaginal en el protocolo descripto, resulta en una importante sincronización de la aparición de folículos ovulatorios alrededor del 5to día post retiro. The aim of the present study was to evaluate the effect of a progesterone releasing intravaginal device plus the injection of PGF2α at removal and the application of hCG on day 5 after withdrawal on the ovarian activity in cyclic mares. Additionally, pregnancy rates were evaluated at the end of the study. Animals were divided into two groups: Treated with an intravaginal device containing 1.38 g progesterone during 8 days plus PGF2α at the removal time and an hCG injection to animals with a follicle with a diameter ≥ 30 mm on day 5 and controls (no treatment). Four days after removal, animals were mated. Plasma progesterone concentrations remained 2.1 ng ml-1 during the period that the devices were kept into the vagina. An ovulatory follicle between the device removal and hCG application was observed in 83.4% (25/30) of the treated animals: 68% (17/25) ovulated in response to hCG while 32% (8/25) ovulated spontaneously during the first 4 days post device removal. In the control g
Efecto de un dispositivo intravaginal con progesterona sobre la actividad ovárica en yeguas cíclicas
Bianchi,C.P; Guerrero,R; Videla Dorna,I; Cavilla,M.V; Aba,M.A;
InVet , 2011,
Abstract: the aim of the present study was to evaluate the effect of a progesterone releasing intravaginal device plus the injection of pgf2α at removal and the application of hcg on day 5 after withdrawal on the ovarian activity in cyclic mares. additionally, pregnancy rates were evaluated at the end of the study. animals were divided into two groups: treated with an intravaginal device containing 1.38 g progesterone during 8 days plus pgf2α at the removal time and an hcg injection to animals with a follicle with a diameter ≥ 30 mm on day 5 and controls (no treatment). four days after removal, animals were mated. plasma progesterone concentrations remained 2.1 ng ml-1 during the period that the devices were kept into the vagina. an ovulatory follicle between the device removal and hcg application was observed in 83.4% (25/30) of the treated animals: 68% (17/25) ovulated in response to hcg while 32% (8/25) ovulated spontaneously during the first 4 days post device removal. in the control group, ovulations occurred randomly. on day 45, animals were ultrasonographed for pregnancy diagnosis. it was recorded a higher percentage of pregnant mares during the first days post treatment in the t group although differences were not statistically significant. in summary, the use of an intravaginal device containing progesterone in a protocol as presented in this study permit an important synchronization of the appearance of ovulatory follicles around day 5 after removal.
Quand la démocratie s’assoit sur des volcans : l’émergence des populismes charismatiques
Alexandre Dorna
Amnis , 2005, DOI: 10.4000/amnis.969
Abstract: Le populisme est inséparable des situations de crises politiques et d’une entropie démocratique. Le syndrome est connu : la formation de puissantes machines électorales, l’apathie des citoyens, l’aveuglement des élites. Or, le facteur psychologique reste dans le clair-obscur des modèles historiques. Autres éléments sont évoquées : les théories interprétatives du populisme, les indices du langagiers du discours, et le leadership émotionnel. El populismo no puede separarse de las situaciones de crisis políticas ni de la entropía democrática. El síndrome es conocido: la formación de maquinas electorales poderosas, la apatía de los ciudadanos, y la ceguera de las elites. Sin embargo, el factor psicológico permanece en el claro-oscuro de los modelos históricos. Otros elementos son evocados : las teorías interpretativas del populismo, los índices lingüísticos del discurso populista y el liderazgo emocional. the populism is indissociable with the political crises and democratic entropy. The syndrome is known: formation of powerful electoral machines, the apathy of the citizens, and blindness of the elites. However, the psychological factor remains in clearly-obscure historical models. Other elements evoked are: the theoretical interpretations of the populism, the linguistics marks of the speech, and the emotional leadership.
Avant-propos : Le populisme, une notion peuplée d’histoires particulières en quête d’un paradigme fédérateur
Alexandre Dorna
Amnis , 2005, DOI: 10.4000/amnis.967
Abstract: Les contributions dont nous avons l’honneur de faire ici la présentation se placent sur une problématique commune : le populisme. Cet ouvrage composé de dix articles souligne à quel point les études sur le populisme sont confrontées à la réalité récurrente d’une problématique à visages multiples, car l’absence d’une théorie explicative générale se manifeste sans cesse depuis des années.Pourtant, le populisme parcourt le monde en semant trouble et émoi au sein des sociétés politiques...
Deductivismo versus inductivismo? Croquis para una reflexión tolerante en psicologia
Alejandro Dorna
Revista Latinoamericana de Psicología , 1985,
Abstract:
La psicología del comportamíento en Chile entre los a os 1970 y 1973
Alejandro Dorna
Revista Latinoamericana de Psicología , 1982,
Abstract:
La psicología política: una disciplina en la encrucijada.
Maritza Montero,Alejandro Dorna
Revista Latinoamericana de Psicología , 1993,
Abstract:
Impacto persuasivo del gesto en el discurso político: una experiencia de consejo (asesoria) y de laboratorio
Alejandro Dorna,Gabriel Argentin
Revista Latinoamericana de Psicología , 1993,
Abstract:
Semantic-based Transfer
Michael Dorna,Martin C. Emele
Computer Science , 1996,
Abstract: This article presents a new semantic-based transfer approach developed and applied within the Verbmobil Machine Translation project. We give an overview of the declarative transfer formalism together with its procedural realization. Our approach is discussed and compared with several other approaches from the MT literature.
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