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  • 1990-1994  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 115 (1992), S. 20-30 
    ISSN: 0942-0940
    Keywords: Progesterone receptor ; meningiomas ; immunocytochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Progesterone (PR) and oestrogen (ER) receptors were examined in meningiomas from 36 patients, using immunocytochemistry. The present experiments were performed to evaluate: (a) the presence and intracellular localization of these receptors, (b) whether PR immunostaining can be correlated (or not) with proliferation potential, as evaluated by histopathological features or the clinical evolution of this neuropathological tumour. Twenty six tumours (72%) tested were positive for PR but none for ER. The presence of PR immunostaining was more frequently observed in females (79% versus 58% in males) and premenopausal status (84% versus 3/5 in postmenopausal). Correlations of PR immunostaining with the histologic type showed 89% of meningothelial, 4/6 cases of transitional, 1/3 case of fibroblastic and 1/4 cases of anaplastic meningiomas to be immunostained for PR. Staining was confined to tumours arachnoidal cells. A heterogeneous distribution was observed in most PR-positive meningiomas. The preferential immunostaining in meningothelial histological types correlates with the presence of PR in normal arachnoidal cells. The proliferating potential of these meningiomas was evaluated by the immunostaining of an antigen only present in proliferating cells (Ki antigen). There was no significant correlation between PR status and the Ki labelling rate, or rapid clinical evolution. These data were compared with those previously reported. They confirm that the cellular biosynthesis of PR in meningiomas is not oestrogen regulated as it is in other sex steroid tissues, such as the breast and the endometrium.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Tropical animal health and production 26 (1994), S. 180-186 
    ISSN: 1573-7438
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Resumé Trois cents poussins femelles d'un jour de souche Warren Isabrown ont été élevés jusqu'à l'âge de 18 semaines dans 3 climats artificiels distincts, respectivement tempéré (20°C, 60% HR), chaud sec (32°C, 40% HR) et chaud humide (32°C, 90% HR). A l'âge de 18 semaines chaque lot d'oiseaux a été divisé en trois et réparti à nouveau en 3 cellules de ponte conditionnées de la même façon que les salles de croissance. Différentes rations alimentaires sont nourries aux oiseaux jusqu'à l'âge de 18 semaines. La consommation d'énergie nécessaire pour produire le même poids vif à 18 semaines a été sensiblement égale dans les 3 climats. L'effet des traitements en période de croissance n'a pas été significativement différent (P〉0·05) sur la presque totalité des paramètres étudiés en ponte, exception faite du gain de poids vif 18–38 semaines, des ingérés alimentaires et énérgétiques. Par contre, à l'exception de la maturité sexuelle, tous ces paramètres ont à chaque fois été influencés négativement (P〈0·05) par les effets des climats chauds en période de ponte, indépendamment du climat d'élevage. Les résultats de cette expérience semblent indiquer que la température expérimentée pendant les 18 premières semaines après l'éclosion a eu peu d'effet sur la productivité ultérieure, et que l'élevage des oiseaux à hautes températures ambiantes ne leur confère pas une meilleure acclimatation à ces mêmes conditions que lorsqu'ils sont élevés en milieux tempérés.
    Abstract: Resumen Se leavantaron 300 pollitas de un día de nacidas, Warren Isabrown, por 18 semanas en 3 climas diferentes; templado (20°C, 60% HR), seco caliente (32°C, 40% HR) y caliente húmedo (32°C, 90% HR). A las 18 semanas cada grupo fue dividido en 3 y re-instalado en 3 cuartos de postura con aire acondicionado durante el período de crecimiento. Los 3 grupos recibieron diferentes dietas hasta las 18 semanas. La energía necesaria para producir el mismo peso promedio a las 18 semanas fue el mismo en las tres cámaras climáticas. El efecto del tratamiento durante el período de crecimiento no fue significativamente diferente (P〉0·05) para la mayoría de parámetros medidos subsecuentemente durante el peródo de postura. La excepción fue el aumento en peso corporal entre las 18 y 38 semanas y la energía consumida. Sin embargo, aparte de la madurez sexual, todos los parámetros fueron afectados negativamente (P〈0·05) por el efecto de los climas cálidos durante el período de postura, irrespectivamente del manejo. Los resultados de este estudio parecen indicar, que la temperatura ambiente experimentada durante las primeras 18 semanas después del nacimiento, tuvo poco efecto sobre la productividad y que la crianza de aves a temperatura ambiente alta, no las aclimata para esas condiciones mejor que levantandolas bajo un clima templado.
    Notes: Summary Three hundred Warren Isabrown female day old chicks were raised for 18 weeks in 3 distinct artificial climates described as temperate (20°C, 60% RH), hot dry (32°C, 40% RH) and hot humid (32°C, 90% RH). At 18 weeks each group was divided into 3 and re-allocated to 3 similar air-conditioned laying rooms as during the growing period. Different diets were fed to the 3 groups up to 18 weeks. The energy needed in order to produce the same average live body weight at 18 weeks was similar in all the 3 climatic chambers. The effect of treatments in the growing period was not significantly different (P〉0·05) for most of the parameters subsequently measured during the laying period. The exception was the body weight gain between 18 and 38 weeks and the food and energy intakes. However, apart from the sexual maturity, all these parameters were negatively influenced (P〈0·05) by the effect of hot climates during the laying period irrespective of method of rearing. The results of this study seem to indicate that ambient temperature experienced during the first 18 weeks after hatching has little effect on subsequent productivity and that rearing birds at high ambient temperature does not acclimatise them to these conditions better than rearing them under temperate conditions.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Mathematical geology 24 (1992), S. 437-447 
    ISSN: 1573-8868
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Type of Medium: Electronic Resource
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