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A method which serves to isolate the gonads from the sea cucumber (Holothuria polii) is outlined. Criteria that will secure a well determined status of maturity of the sperm are given. From this preparation a deoxyribonucleic acid is made, purified and analysed. It is concluded that the analytical data are in compliance with the theory of Crick and Watson. The ratio of Moles for this DNA while its nitrogen to phosphorus ratio on weight basis is 1,67.
G. Mackensen und W. Zeltmann: Wissenschaftliche Trickfilme für den Hochschulunterricht - mit eigenen Mitteln hergestellt; J. Rieck: Zusammenstellung von Schmalfilmbildwerfern für 16-mm-Film ; Veröffentlichungen aus dem Institut für den Wissenschaftlichen Film ; Referierung von wissenschaftlichen Filmen ; Neue Filme des Instituts ; Mitteilungen