Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 377 for “"Testosterone"”.
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Metabolism of testosterone by tissue enzymes
… existence of an enzyme system which metabolizes testosterone to [triangle]^4-androstene-3, 17-dione and "polar compounds" has been established. Several enzyme systems are felt to be active in testosterone breakdown by human skin; some of these from "polar compounds", one of them forms …
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Testosterone, Lycopene Isomers, and Prostate Cancer
… diet restriction on N-methyl-N-nitrosourea (NMU)-testosterone-induced prostate cancer in rats. Survival was analyzed to include only rats that died with adenocarcinomas of the accessory sex glands. Only tomato powder-fed (RR = 0.570; P = 0.009) rats experienced significantly increased survival as …
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Testosterone and behavior in female marmosets
This study examines the role of testosterone in mediating behavior in common marmosets (Callithrix jacchus) and across the primate order. Testosterone has been primarily studied in males. Male behaviors related to mating success (competition and finding mates) are positively associated with …
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Testosterone and competition in women and men
High testosterone is linked to dominance and competitive behaviors, but that link is less clear in humans, particularly in women. High testosterone women may hesitate to compete because they may suffer negative social consequences for behaving dominantly. We hypothesized that women in general would …
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Associations Between Testosterone, Androgen Receptor Polymorphism, And Mood
Recent findings suggest that insufficient testosterone levels may be associated with depressive affect in men. Genetic variability in the androgen receptor (polyglutamine [CAG] repeat length) may be important for this relationship. However, the relationship between testosterone, androgen receptor …
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Self-Construal Moderates Testosterone Reactivity To Competitive Outcomes
<p>Previous research shows that testosterone reactivity to competitive outcomes predicts aggressive behavior in men. However, some studies have failed to find these effects, and it has been suggested that individual differences moderate the relationships between competitive outcomes, testosterone …
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Mrp4 Is a Crucial Regulator of Testosterone Biosynthesis
… there is no current evidence that Mrp4 regulates testosterone biosynthesis. The role of Mrp4 was investigated in Leydig cells where testosterone production is regulated by cAMP, an intracellular second messenger formed when the luteinizing hormone (LH) receptor (Lhr) is activated. As Mrp4 …
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The effects of testosterone propionate on hindlimb immobilized rats
… diminished due to chronic limb immobilization.Testosterone is classified as an anabolic steroid which has the effect of increasing protein synthesis in many tissues. Recently, testosterone has been shown to have a definite anti-catabolic effect on skeletal muacle by competing with …
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Circulating and organizational testosterone and the perception of dominance
1 PDF file (v, 53 pages)
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Immunocompetence, testosterone and breeding success in red bishop (Euplectes orix)
The life-history theory postulates that individuals need to allocate limited resources (i.e. energy expenditure, time, effort) to multiple conflicting life functions (i.e. growth, health maintenance, reproduction). Resources available to any given individual are always finite and any investment in …
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Handling Risk: Testosterone and Risk Preference, Evidence from Dhaka, Bangladesh
<p>The relationship between testosterone and risk aversion is of increasing interest in the experimental economics. Using the ratio of the second digit to the fourth digit (2D:4D) as a rough indicator of level of prenatal testosterone exposure, this study attempts to replicate recent results from …
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Prenatal Testosterone, Empathy, Emotion Recognition, and Facial Mimicry in Women
… recognition, and empathy are related to prenatal testosterone (PT) exposure. Previous studies have found relationships among facial mimicry, emotion recognition, and selfreport empathy scores; further, imaging studies suggest that mimicry, emotion recognition, and empathy have shared neural bases. …
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Testosterone might be influenced by co-morbidities, not by aging
BACKGROUND: Total testosterone in men decreasing with age is well-established. However, observations on aging-related decrease in total testosterone (TT) are not consistent. The aim of this study is to seek the relationship between testosterone and health status and investigate the influence of the …
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The effects of testosterone on embodiment: implications for social power
… and behavior, this thesis examined the role of testosterone in mapping the state of the body. The general aim was thus to contribute to the literature on the embodied basis of power by asking whether a change in the neurochemistry associated with social power has any effect on embodiment? …
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Salivary testosterone and cortisol measurements in profesional elite rugby union players
… in monitoring plasma concentrations of testosterone (T) and cortisol (C). Study one investigated the relationship between total serum and saliva concentrations of T and C in healthy men (n = 4) under resting conditions. Blood and saliva were sampled simultaneously from 9:00 am until …
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Dare to approach: Effects of testosterone on avoidance in social anxiety
Contains fulltext : 170320.pdf (Publisher’s version ) (Open Access)
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FEMALE COMPETITION AND THE ROLE OF TESTOSTERONE IN A POLYGYNOUS SYSTEM
Testosterone plays an important role in male competitive ability, and it may play a similar function in females. Female-female competition for resources is often associated with high testosterone, both within females and in comparison to males. Positive associations between testosterone and …
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FEMALE COMPETITION AND THE ROLE OF TESTOSTERONE IN A POLYGYNOUS SYSTEM
Testosterone plays an important role in male competitive ability, and it may play a similar function in females. Female-female competition for resources is often associated with high testosterone, both within females and in comparison to males. Positive associations between testosterone and …
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The Effects of VO2max on Levels of Testosterone as Males Age
Purpose: The reduction of Testosterone secretion by the gonads is “hypogonadism” and development of age-related hypogonadism is known as “late-onset hypogonadism”. Late-onset hypogonadism is characterized by issues such as osteoporosis, Alzheimer’s disease, frailty, obesity, cardiac failure and …
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Appetite Regulatory Neural Circuitry in the Prenatal Testosterone Treated and Obese Ewe
… at increased risk of obesity following prenatal testosterone (T) treatment, or in diet-induced obese ewes. Using immunocytochemistry, we found that prenatal T-treated ewes showed increased expression of the appetite stimulatory peptide, AgRP, but not the inhibitory peptide, POMC, consistent with …
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