[Release of DNA from the nuclei of hepatocytes of rats following their treatment with heparin]. / Vykhod DNK iz iader gepatotsitov krys pri obrabotke ikh geparinom.

The influence of heparin on the protein fractions and DNA of the isolated nuclei of hepatocytes was studied by biochemical and cytospectrophotometrical methods on Wistar rats. It was found that 0.05% sodium heparinate solution blocked 95% of the histones, not influencing the non-histone proteins of the cell nucleus. Histone blocking was connected with the DNA release into the incubation medium in the amounts proportional to the incubation period.

[Feulgen reaction conducted on unfixed smears]. / Provedenie reaktsii Fel'gena na nefiksirovannykh mazkakh.

After hydrolysis with 5N HCl at room temperature Feulgen's reaction either with Schiff's reagent or with some basic dyes instead of it can be carried out on the air-dried smears without any chemical fixation. Both reactions give quantitative results.