SOME EFFECTS OF A SINGLE INJECTION OF CHLORMADINONE ACETATE ON SEXUAL DEVELOPMENT IN SUFFOLK RAMS

1967 ◽  
Vol 56 (1_Suppl) ◽  
pp. S146 ◽  
Author(s):  
J. D. Skinner
Keyword(s):  
Sexual Development ◽  
Single Injection ◽  
Chlormadinone Acetate

Limites et améliorations du sexage des salmonidés par dosage de la 11-cétotestostérone circulante

1983 ◽  
Vol 61 (2) ◽  
pp. 457-460 ◽  
Author(s):  
P.-Y. Le Bail ◽  
A. Fostier ◽  
O. Marcuzzi
Keyword(s):  
Sex Determination ◽  
Organic Solvents ◽  
Sexual Development ◽  
Single Injection ◽  
Plasma Concentrations ◽  
Pituitary Extract

The use of plasma concentrations of 11-ketotestosterone for determining sex has been studied in various species of salmonids (O. kisutch, S. salar, S. gairdneri, S. trutta) at different stages of their sexual development. Radioimmunological titrations were performed; though they are less sensitive than filtrations with an extraction by organic solvents, they are quicker to use. The percentage of error in sex determination is low (5%) in animals that have developing gonads or that are still in prepuberty, but is much higher in immature animals. A single injection of total pituitary extract (equivalent to 100 ng of s-GtH per gram) will reduce this error to 2% by stimulating 11-ketotestosterone secretion.[Journal translation]

The Fine Structure of Rat Granulosa Cell Cultures Correlated with Progestin Secretion

1973 ◽  
Vol 31 ◽  
pp. 552-553
Author(s):  
T. M. Crisp ◽  
F.R. Denys
Keyword(s):  
Fine Structure ◽  
Granulosa Cell ◽  
Cell Cultures ◽  
Single Injection ◽  
Surrounding Medium ◽  
Petri Dish ◽  
Female Rats ◽  
Vaginal Smear ◽  
Immature Female ◽  
Serum Gonadotropin

The purpose of this paper is to present observations on the fine structure of rat granulosa cell cultures grown in the presence of an adenohypophyseal explant and to correlate the morphology of these cells with progestin secretion. Twenty-six day old immature female rats were given a single injection of 5 IU pregnant mares serum gonadotropin (PMS) in order to obtain ovaries with large vesicular follicles. At 66 hrs. post-PMS administration (estrus indicated by vaginal smear cytology), the ovaries were removed and placed in a petri dish containing medium 199 and 100 U penicillin/streptomycin (P/S)/ml. Under a 20X magnification dissecting microscope, some 5-8 vesicular follicles/ovary were punctured and the granulosa cells were expressed into the surrounding medium. The cells were transferred to centrifuge tubes and spun down at 1000 rpm for 5 mins.

Parenting and Adolescents’ Sexual Development in Western Societies

2011 ◽  
Vol 16 (1) ◽  
pp. 21-31 ◽  
Author(s):  
Hanneke de Graaf ◽  
Ine Vanwesenbeeck ◽  
Liesbeth Woertman ◽  
Wim Meeus
Keyword(s):  
Sexual Behavior ◽  
Parenting Styles ◽  
Sexual Development ◽  
Parental Support ◽  
Empirical Studies ◽  
Sexual Practices ◽  
Psychosexual Development ◽  
First Sexual Intercourse ◽  
Parenting Influences ◽  
Reciprocal Associations

This review examines associations between parenting styles and the psychosexual development of adolescents. Methods and results of empirical studies of associations between parental support, control, and knowledge and the sexual behavior and sexual health of adolescents are described and evaluated. The results show that, in general, higher scores on support, control, and knowledge relate to a delay of first sexual intercourse, safer sexual practices, and higher sexual competence. Despite the vast amount of literature on this subject, the majority of these studies focus on single dimensions of parenting and unidirectional parenting influences. This review generates hypotheses regarding interactions of different parenting styles and reciprocal associations between parents and their children. There is a need for more dynamic, dialectical studies of parenting, and children’s sexual development.

Quantifying in vivo dopaminergic D2-receptors Bmax and KdVr with microPET® focus after a single injection of [11C]raclopride

2005 ◽  
Vol 25 (1_suppl) ◽  
pp. S649-S649
Author(s):  
Laurent Besret ◽  
Jean-Dominique Gallezot ◽  
Frédéric Dollé ◽  
Philippe Hantraye ◽  
Marie-Claude Grégoire
Keyword(s):  
Single Injection ◽  
D2 Receptors ◽  
Quantifying In

CORTICOTROPIN-BESTIMMUNG ANHAND DES CORTICOSTERONANSTIEGES IM NEBENNIEREN-VENENBLUT HYPOPHYSEKTOMIERTER RATTEN

1962 ◽  
Vol 41 (2) ◽  
pp. 211-218 ◽  
Author(s):  
K. Retiene ◽  
H. Ditschuneit ◽  
M. Fischer ◽  
K. Kopp ◽  
E. F. Pfeiffer
Keyword(s):  
Peripheral Blood ◽  
Single Injection ◽  
Venous Blood ◽  
Corticosterone Level ◽  
The Other ◽  
Adrenal Vein ◽  
Major Surgery ◽  
Other Hand ◽  
Hypophysectomized Rats

ABSTRACT Corticotrophin has been measured by using the corticotrophin-induced increase of corticosterone in adrenal venous blood of rats, the corticotrophin secretion of which has been blocked by preliminary injection of dexamethasone. Sensitivity and precision of this technique have not been higher than in the simpler procedure using corticosterone increase in peripheral blood. Single injection of dexamethasone on the other hand did not prevent release of endogenous corticotrophin following major surgery, required for canulation of the adrenal vein. In hypophysectomized rats corticotrophin can be measured by using adrenal venous blood. 0.05 mU corticotrophin (US-P-Standard) has been determined with an index of precision of λ = 0.13. The consistent relation between initial and elevated corticosterone level following corticotrophin in both peripheral and adrenal venous blood makes it highly unlikely that other modifications of this kind of assay will increase sensitivity.

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