منابع مشابه
Studies of Spermatogenesis in the Hepaticae
An ultrastructural study of late-stage androgonial cells of Blasia pusilla, a thallose liverwort, showed the nearly spherical nuclei often lying close or appressed to the cell walls. In some cells the two membranes comprising the nuclear envelope separated, the inner membrane continuing intact as a limiting boundary of the nucleus and the membrane on the outer, cytoplasmic side recurving away f...
متن کاملpostnatal studies of bats (pipistrellus kuhlii and miniopterus schreibersii) & histomorphology and histochemistry studies of organs and diseases of (neurergus microspilotus and n. kaiseri)
1. to determine whether difference in birth body mass influenced growth performance in pipistrellus kuhlii we studied a total of 12 captive-born neonates. bats were assigned to two body mass groups: light birth body mass (lbw: 0.89 ± 0.05, n=8) and heavy birth body mass (hbw: 1.35 ± 0.08, n=4). heavier body mass at birth was associated with rapid postnatal growth (body mass and forearm length) ...
Comparative studies of spermatogenesis in fertile and subfertile men.
Testicular biopsy specimens from 16 fertile and 10 subfertile men with normal male karyotype were studied quantitatively to provide histological and cytogenetic data for a basis of reference in assessing abnormalities of spermatogenesis. Histological studies included estimation of the proportion and activity of germinal epithelium and an assessment of tubular morphology. In cytogenetic preparat...
متن کاملQuantitative studies on spermatogenesis in buffalo (Bubalus bubalis).
The qualitative behaviour of spermatogenetic cells and Sertoli cells in the buffalo (Bubalus bubalis) was studied by identifying 8 stages of the seminiferous epithelium cycle based on meiotic division and morphology as well as the position of more mature spermatids. To achieve better results, stages 1, 2, 3, 4 and 8 were sub-divided. Six peaks of spermatogonial mitosis suggested six generations...
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ژورنال
عنوان ژورنال: The Japanese Journal of Urology
سال: 1978
ISSN: 0021-5287,1884-7110
DOI: 10.5980/jpnjurol1928.69.12_1605