02603naa a2200277 a 450000100080000000500110000800800410001902400470006010000160010724502440012326000090036752016810037665000240205765000170208165000200209865000100211865000160212865000120214465000110215665000170216765000110218465300210219570000180221670000170223477300740225115237352025-06-11       1964    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1262/jrd1955.10.522DOI1 aIRITANI, A.  aStudies on the egg-yolk coagulating enzyme in goat semen. VII. Variations in the enzyme activity of the semen between breeding season and non-breeding season, and in each ejaculate collected three times successively.h[electronic resource]  c1964  aSome of the factors affecting the activity of the egg-yolk coagulating enzyme in goat semen have been reported in the previous report of this study. This experiment was performed to clarify the variations in the enzyme activity owing to the collection time and the season when the semen was collected throughout the year, March 1960 to April 1962. Besides, some seminal constituents, fructose, citric acid and protein, that are probably secreted from the seminal vesicle were determined quantitatively in comparison with the activity of the egg-yolk coagulating enzyme which may be secreted from the Cowper's gland. And thus we intended to examine the presence of any relationship between the seminal vesicle constituents and the Cowper's gland secretion. Principal results obtained are as follows. Activity of the egg-yolk coagulating enzyme was significantly higher in the breeding season, August to March, than in the non-breeding season in each goat. 2. It was recognized that the enzyme activity of the seminal plasma was enhanced significantly as the collection time was advanced, from the results of averaging 110 trials of three successive ejaculations on three goats throughout the year. 3. Concentrations of fructose, citric acid and protein in seminal plasma were significantly higher in the breeding season than in the non-breeding season as in the case of the coagulating enzyme, but there was no significant difference among the collection time, 1 st, 2 nd and the 3 rd in contrast to the results obtained in the enzyme activity. So it was suggested that some difference might be seen in the secreting mechanism between the seminal vesicle and the Cowper's gland  aAnimal reproduction  aBiochemistry  aEnzyme activity  aGoats  aBioquímica  aCaprino  aEnzima  aReprodução  aSêmen  aSemen collection1 aNISHIKAWA, Y.1 aNAGASAWA, S.  tJapanese Journal of Animal Reproductiongv. 10, n. 2, p. 52-56, 1964.