Yuta Kamiguchi

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Chinese hamster spermatozoa gain their ability to move when they descend from the testis to the distal part of the caput epididymis, but it is not until they enter the corpus epididymis that they become capable of fertilizing eggs. The maturation of the spermatozoa proceeds as they further descend the tract and perhaps continues even in the vas deferens.(More)
BACKGROUND Although mouse spermatozoa can be freeze-dried without losing their reproductive capacity, the technique needs further improvements to reduce the incidence of chromosomal damage to spermatozoa. Effects of freeze-drying on human spermatozoa are unknown. METHODS Mouse spermatozoa were suspended in a Tris-buffered EGTA solution briefly (10 min at(More)
Synaptic ribbons (SR) in pinealocytes of adult (120-130 day-old) male Chinese hamsters (Cricetulus griseus) were classified into types 1, 2 and 3; these have a central dense structure showing rod-like, various and ring-like profiles, respectively. The central structure of the type-2 SR usually appeared as round, oval or comma-like bodies, and occasionally(More)
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