[Pigmentation of Serratia marcescens and spectral properties of prodigiosin].

Pigmentation of Serratia marcescens depends on the composition of the cultivation medium. The cultures grown on glycerol-peptone medium and on the medium with acetate are red and yellow (yellowish orange), respectively, with the color depending on the ambient pH. S.

Response of pigmented Serratia marcescens to the illumination.

Variations in the illumination conditions (light/darkness) affected both the biosynthesis of prodigiosin and energy metabolism of the pigmented strain ATCC 9986 Serratia marcescens growing aerobical in the batch culture were shown. In the process incubation the transition of the pigmented culture from illumination within (24 h, 48 h) in the dark conditions increased the prodigiosin synthesis by 2.0, 2.

Antiulcer activity of preparations containing ultralow doses of antibodies in modeled chronic ulcer in rats.

Screening of three potential antiulcer preparations containing ultralow doses of antibodies to endogenous regulators of ulcer formation (gastrin, histamine, and H2 histamine receptors) on the model of acetic acid-induced gastric ulcer in rats revealed pronounced antiulcer effect of ultralow doses of antibodies to histamine. The dynamics of regeneration of the ulcer focus by morphological and histological characteristics was similar during treatment with ultralow doses of antibodies to histamine and with famotidine.

[The effect of apoptosis inductor dexamethasone on the energy exchange and ultrastructure of plant cells].

Changes in respiration and cell ultrastructure induced by long-term incubation with dexamethasone (DM) in excised roots of 5-day old wheat (Triticum aestivum L.) seedlings were investigated. During 5 h incubation of roots with DM, oxygen consumption was inhibited by 20-30%, while respiratory coefficient did not change and its value was about 1.