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Updated: Aug 4, 2026

09:48
Separation of Spermatogenic Cell Types Using STA-PUT Velocity Sedimentation
Published on: October 9, 2013
Identification of the volatile factor involved in spermatocyte differentiation in vitro
Abstract:
Ketchel and Williams postulated a "volatile factor" which participates in the differentiation of insect spermatocytes in vitro. It was found not to be a specific product of developing cysts. Instead, its effects are duplicated by a number of reagents which have only a high water content in common. The hypothesis that the volatile factor is water was experimentally confirmed.
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