CENTRIFUGAL PATTERNS AND MORPHOLOGICAL VARIATION OF BULL SPERMATOZOA
نویسندگان
چکیده
منابع مشابه
Study of Bull Spermatozoa
The electron microscope has been used to determine the characteristic dimensions and the distribution of the dry mass in bull spermatozoa. The most important result is that all characteristic data are occurring in logarithmic distributions. Furthermore, no correlation between such parameters as head weight and tail weight or head length and tail length was found. The occurrence in logarithmic d...
متن کاملThe Morphology of Bull Spermatozoa
It has been known since the nineteenth century that the microscopical structure of living cells may be modified by fixation and by post-mortem or sub-mortem changes (Hardy, 1899), but inadequate attention seems to have been paid to factors which may injure spermatozoa before fixation and microscopical examination. One such factor is the effect of sudden cooling. If semen is exposed to a sudden ...
متن کاملThe effect of sperm concentration in the ejaculate on morphological traits of bull spermatozoa.
Experiments were performed on 75 ejaculates obtained from 19 bulls representing different cattle breeds used at the Masovian Centre for Animal Breeding and Reproduction in Łowicz. Fresh ejaculates were measured in respect to their volume and sperm count in the ejaculates was determined. The ejaculates were classified based on the criterion of sperm concentration and divided into five groups. Sp...
متن کاملThe metabolism of pyruvate in bull spermatozoa.
1. Sugars present in nectar secreted by twelve species were separated on paper chromatograms, and quantitative determinations of the amounts of glucose and fructose were made. The total sugar content of each sample was measured with a refractometer. 2. The proportions of glucose and fructose varied greatly in nectar from different species. 3. For any one species, the proportions of the differen...
متن کاملDynamics of microRNAs in bull spermatozoa
BACKGROUND MicroRNAs are small non-coding RNAs that regulate gene expression and thus play important roles in mammalian development. However, the comprehensive lists of microRNAs, as well as, molecular mechanisms by which microRNAs regulate gene expression during gamete and embryo development are poorly defined. The objectives of this study were to determine microRNAs in bull sperm and predict ...
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ژورنال
عنوان ژورنال: Reproduction
سال: 1970
ISSN: 1470-1626,1741-7899
DOI: 10.1530/jrf.0.0230041