Imitation of artificial membrane system via mobile phases with Tween-80 and cholic acid in biopartitioning micellar chromatography.

The chromatographic behaviour of compounds of biomedical significance was studied using micellar mobile phases modified with polyoxyethylene (20) sorbitan monooleate (Tween-80). The influence of the surfactant within the 0.75-4% concentration range on the retention factor of model compounds was investigated.

Investigation of artificial biomembrane systems in biopartitioning micellar chromatography by method of mathematical design.

An attempt to create and study an artificial membrane system was realized via biopartitioning micellar liquid chromatography. Towards this end the known formula of membrane permeability (on the basis of Fick's diffusion equation) was modified so that membrane permeability may be estimated in terms of chromatographic characteristics. The two-factoral experiments on the basis of mathematical design of second order were carried out.

Interaction of surface-active drugs in rabbits.

The interaction of chlorpromazine and promethazine in vivo has been investigated. The drugs were administered to the rabbit orally as a single dose (100 mg of each drug) as well as simultaneously with an interval of 15 min. The presence of multiple peaks at the separate administration of promethazine and chlorpromazine on the one hand, and increase of number of peaks, symbathic character of kinetic curves of mentioned drugs and its prolonged appearance in the systemic circulation of the blood by simultaneous administration on the other hand, may be explained by the intensive presystem metabolism and surface-activity ability of these drugs, and by the periodic 'lassitude' of liver for their capture and elimination (either presystem or systemic).

The study of growth inhibitive protein factor by various mode of HPLC and estimation of its binding with drugs.

The protein fraction of the brain of white rat inhibiting the proliferation of homological cells was studied by hydrophobic interaction and reversed-phase liquid chromatography. The hybrid modification of hydrophobic interaction and biopartitional micellar chromatography was also applied for the elution of hydrophobic component of brain protein fraction. It was established that this protein fraction represents a hydrophilic-hydrophobic complex.

Influence of nonionic surfactants on the chromatographic behaviour of proteins in hydrophobic interaction chromatography.

The chromatographic characteristics of proteins in the presence of additives of nonionic surfactants Brij-35 and Tween-80 in the conditions of descending gradient of ammonium sulfate and phenyl-coated polymeric stationary phase were investigated. It was revealed that retention factors of proteins may be regulated by use of mentioned additives. The improvement of resolution is achieved for some hardly separated pairs of proteins, viz.

Interaction of carbamazepine and promethazine in rabbits.

The interaction of carbamazepine and promethazine in rabbits has been investigated. The influence of this interaction on the processes of biotransformation in the liver was revealed. The drugs were administered as single oral doses (100 mg of each drug) as well as simultaneously with an interval of 15 min.

Determination and pharmacokinetic study of ferrocene-A in blood serum of rabbits.

Ferrocene-A (ferrocenyl-1-phenyl-1-dioxy-1,4-butin-2) has significant antitumour and antibacterial properties. This study was designed to estimate main pharmacokinetic parameters of ferrocene-A (FC-A). These parameters are very important from the standpoint to elucidate the mechanism of pharmacological action of ferrocene-A.