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Steroidogenic cells reorganize into discrete colonies surrounded by fibroblastic cells when juvenile chicken testes cells are dissociated and cultivated in monolayers. Electron microscopic observations in combination with cytochemistry indicate the existence of electron opaque material in the intercellular spaces between the steroidogenic cells only. In the light microscope, the cell periphery of steroidogenic cells shows a positive colour reaction with Alcian blue when the cells are observed individually but a negative reaction when the cells are in groups. Results indicate that either there may be a change of the chemical nature of the intercellular material, or there may be two distinct substances reflecting two synthetic processes during cellular reaggregation and reorganization of steroidogenic cells in vitro.

Reaction of phenyl benzoate with tri-n-butyltin hydride has been found to give mainly toluene, benzyl benzoate, tri-n-butyltin phenoxide and tri-n-butyltin benzoate. Possible reaction paths leading to these products are discussed. A SH2 mechanism involving initial attack of tri-n-butyltin radical at the ethereal oxygen atom of the ester with displacement of the benzoyl moiety appears to be consistent with observed experimental evidence.

Two pigments isolated from the roots of Prismatomeris malayana have been shown to be rubiadin-1-methyl ether and rubiadin respectively.