Topochemical localization of lipids in dinosaur bone by means of Sudan B black

A dinosaur bone was examined with the aim to demonstrate in it the presence of lipids and to determine their localization. Ground sections of the bone in question revealed the presence of substances yielding positive reactions on application of a histochemical method used for identification of lipids. Moreover, these substances were found to be localized in the vascular canal, precisely, in the perivascular space. Localization of lipids in a dinosaur bone appeared to be comparable with the distribution of these substances in human bone and in bone of contemporary animals.