Results 81 to 90 of about 186,632 (207)

Review of the gonad index (GI) and an introduction to the concept of its "critical value" : application to the skipjack tuna Katsuwonus pelamis in the Atlantic ocean [PDF]

open access: yes, 1986
With special reference to tunas and using recent results obtained on the skipjack tuna #Katsuwonus pelamis$, the author point out that Gonad Index (GI, defined as the ratio between the weight of the gonads and the size of the fish to the cube) is an ...
Cayré, Patrice, laloë, Francis
core   +1 more source

Fertility induction associated with improved peripheral reproductive parameters in male Prop1df/dfmice subjected to GH and levothyroxine replacement [PDF]

open access: yesArchives of Endocrinology and Metabolism
Objective: The aim of this study was to characterize the parameters of reproductive anatomy and pituitary hormone expression levels in ames dwarf mice (Prop1df/df).
Bruna Viscardi Azevedo   +7 more
doaj   +1 more source

Mutational analysis of DAX1 in patients with hypogonadotropic hypogonadism or pubertal delay [PDF]

open access: yes, 1999
Although delayed puberty is relatively common and often familial, its molecular and pathophysiologic basis is poorly understood. In contrast, the molecular mechanisms underlying some forms of hypogonadotropic hypogonadism (HH) are clearer, following the ...
Achermann, JC   +12 more
core   +1 more source

Hormone Receptor Site Maturation in the Secondary Sex Organs of Immature Male and Female Rats [PDF]

open access: yes, 1976
The effect of a combined dose of pregnant mares\u27 serum (PAAS) and human chor ionic gonadotropin (HCG) on male and female rats 2-25 days old was studied. Groups of animals were given injections for three days, then sacrificed on the fourth day.
Thomas, K. J.
core   +2 more sources

The relationship between osteocalcin levels and sexual stages of puberty in male children

open access: yesThe Turkish Journal of Pediatrics, 2000
Osteocalcin is a specific and reliable marker which increases with rapid bone turnover and gives data about bone metabolism. The pubertal growth spurt is also known as a good example of rapid bone turnover.
A T Sen, O Derman, E Kinik
doaj  

Foliculogénesis Ovárica en la Raya Marmorada, Sympterygia bonapartii (Müller & Henle, 1841) (Chondrichthyes, Rajidae) [PDF]

open access: yes, 2011
Los Condrictios se han convertido en un recurso económico importante en las últimas décadas, siendo Argentina uno de los países que más explota tiburones y rayas, incluso a niveles que exceden los límites de varias especies.
Díaz Andrade, María Constanza   +3 more
core   +1 more source

Relations entre maturation sexuelle, structure familiale et revenu par habitant d’un échantillon d’élèves d’El Yopal, Casanare (Colombie)

open access: yesBulletins et Mémoires de la Société d’Anthropologie de Paris, 2002
The goal of this study is to define the sexual maturation characteristics of a population sample of 864 students (468 females and 396 males) from El Yopal, Casanare-Colombia, and to establish their relationship to two variables: family structure and per ...
Marie-José Ireton   +4 more
doaj   +1 more source

And If Your Friends Jumped Off A Bridge, Would You Do It Too? : How Developmental Neuroscience Can Inform Legal Regimes Governing Adolescents [PDF]

open access: yes, 2015
Legal models of adolescent autonomy and responsibility in various domains of law span a spectrum from categorical prohibitions of certain behaviors to recognitions of total adolescent autonomy.
Pustilnik, Amanda C, Tennison, Michael N
core   +1 more source

COLLEGE STUDENT ALCOHOL USE: USING CURRENT RESEARCH TO GUIDE PRACTICE [PDF]

open access: yes, 2009
Alcohol abuse has been described as the biggest health problem on college campuses today.This single statement illustrates the public health relevance of addressing college student alcohol use.
Guizzetti, Lisa M.
core  

Relations of environmental contaminants, algal toxins, and diet with the reproductive success of American alligators on Florida Lakes [PDF]

open access: yes, 2001
(113 page ...
Arnold, Beverly S.   +3 more
core  

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