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Animal Sciences

University of Richmond

Master's Theses

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Full-Text Articles in Biology

Regulatory Cell Biology Of Growth Hormone And Prolactin In The Cow Mammary Gland, David Andrew Walkup Jan 1989

Regulatory Cell Biology Of Growth Hormone And Prolactin In The Cow Mammary Gland, David Andrew Walkup

Master's Theses

Prolactin (PRL) acts directly on milk secretory cell nuclei to stimulate lactation in rats. In the cow, PRL has been detected in Golgi apparatus, endoplasmic reticulum, and secretory vesicle subcellular fractions of mammary gland , but not nuclear fractions. However, growth hormone {GH) is the galactopoeitic hormone in cows, not PRL. The possibility of GH acting directly on the cow milk secretory cells, and PRL acting on their nuclei was investigated using an immunocytochemical method. PRL and GH were detected in endoplasmic reticular and Golgi apparatus regions of the milk secretory cells, as well as, on nuclear and fat globule …


Growth And Food Habits Of Micropterus Salmoides In Westhampton Lake, Richmond, Virginia, Charles H. Rawls Jr. Aug 1979

Growth And Food Habits Of Micropterus Salmoides In Westhampton Lake, Richmond, Virginia, Charles H. Rawls Jr.

Master's Theses

Age, growth, and food habits of the population of Micropterus salmoides (largemouth bass) in Westhampton Lake were studied from September to November 1978. Two year classes (0 and I) were identified by determining numbers of annuli on the scales of the fish. Growth data indicated that the bass attain a size of 254 mm (10 in.) near the end of their second summer. The length-weight relationship was log W = -4.6829 + 2.9153 log TL. The Fulton condition factor for the population was 1.40. Food habits were described by numerical and frequency of occurrence methods. Young of the year sunfish …