Centrifugation of the chitosan solution to remove air bubbles. Thanks to a collaboration between the start-up Kallistem and IMP, a bio-reactor using chitosan was designed. It is used for work on spermatogenesis: it ensures a perfect containment of the seminiferous tubes, conducive to an integral spermatogenesis. It allowed for the first time to obtain complete human spermatozoa in vitro.

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