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Full-Text Articles in Life Sciences

Slides: A Case Study Of The Roan Plateau Area, Mary Viviano Jun 2007

Slides: A Case Study Of The Roan Plateau Area, Mary Viviano

The Future of Natural Resources Law and Policy (Summer Conference, June 6-8)

Presenter: Mary Viviano, EnCana Oil & Gas (USA) Inc.

14 slides


Morphological And Histochemical Characterization Of The Seminiferous Epithelial And Leydig Cells Of The Turkey, M. R. Bakst, V. Akuffo, P. Trefil, J. P. Brillard Jan 2007

Morphological And Histochemical Characterization Of The Seminiferous Epithelial And Leydig Cells Of The Turkey, M. R. Bakst, V. Akuffo, P. Trefil, J. P. Brillard

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Unlike mammals, there is little fundamental information about spermatogenesis in birds. This study was undertaken to clarify the morphology, histochemistry, and lectin affinity of the seminiferous epithelial cells and Leydig cells in pre-pubertal (8- to 15-week old) and adult (40- to 44-week old) domestic turkeys. In adult turkeys, three types of spermatogonia were defined based on their chromatin distribution and nuclear morphology: the dark type A(Ad); the pale type A(Ap); and the type B. The Ad is the least numerous and least conspicuous and consequently difficult to locate. Based on its spatial distribution and overall …