On the relative roles of increased and constant periods of illumination in the sexual photoperiodic activation of the male starling

Some effects of colored illumination on

Some effects of colored illumination on the sexual activation of the male starling

✍ Burger, J. Wendell 📂 Article 📅 1943 🏛 John Wiley and Sons 🌐 English ⚖ 398 KB

Role of zinc in regulating the testicula

Role of zinc in regulating the testicular function. Part 2. Effect of dietary zinc deficiency on gonadotropins, prolactin and testosterone levels as well as 3β-hydroxysteroid dehydrogenase activity in testes of male albino rats

✍ Mansour, M. M. S. ;Hafiez, A. A. ;El-Kirdassy, Z. H. M. ;El-Malkh, M. N. ;Halawa 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 English ⚖ 386 KB 👁 2 views

Induced zinc deficiency in male albino rats caused a great reduction in the testicular levels of testosterone as compared to control and zinc-supplemented (ZS) rats. Estimation of the testicular levels of follicle-stimulating hormone, luteinizing hormone and prolactin (PRL) in the zinc-deficient (ZD