[The choice of the treatment procedure in complicated forms of gallstones]. / K vyboru taktiki lecheniia oslozhnennykh form zhelchnokamennoi bolezni.

The article is devoted to an assessment of results of treatment of patients with complicated forms of cholelithiasis. Results of the treatment with active surgical measures and use of the endoscopic surgery methods are compared. Advantages of using endoscopy in algorithm of diagnostic and medical measures are shown. Recommendations are given concerning the terms and consequence of using the endoscopic methods of treatment.

[Lactate dehydrogenase activity and changes in its isoenzyme spectrum in the liver of the bream Abramis brama parasitized by pleurocercoids of the cestode Digramma interrupta]. / Aktivnost' laktatdegidrogenazy i izmenenie spektra ee izofermentov v pecheni leshcha Abramis brama pri parazitirovanii plerotserkoidov tsestody Digramma interrupta.

Changes of lactate-dehydrogenase (KF 1.1.1.27) activity have been studied in the liver of the bream been infected with pleurocercoids of the cestode Digramma interrupta. It is showed, that an increase of enzyme activity depends upon a slowly migrating from LDH-6. Problems of interaction at the level of substrate within a system parasite-host is considered.

[The organization of purine and pyrimidine nucleotide biosynthesis in Sporozoa (Protozoa)]. / Organizatsiia biosinteza purinovykh i pirimidinovykh nukleotidov u sporovikov (Protozoa, Sporozoa).

Analysis of peculiarities in organization and functioning of metabolic ways of biosynthesis of purine and pyrimidine nucleotides in representatives of Sporozoa type has shown that molecular aftereffects of adaptation to intracellular parasitism in unicellular eukaryotes consists in the increase in the level of molecular organization, loss of some metabolic path ways and some enzymes, origin of a new metabolic system, a host-parasite one. Functioning of this system is achieved due to developing by the parasite mechanisms that are similar to the host's ones.

[The secretory proteins in the plerocercoids of the cestode Digramma interrupta and their enzymatic activity]. / Sekretornye belki plerotserkoidov tsestody Digramma interrupta i ikh fermentativnaia aktivnost'.

A composition of secretory proteins of plerocercoids of the cestode Digramma interrupta and their enzyme activity have been studied. It has been shown that plerocercoids produce 26 secretory proteins with molecular weight range of 3.9 to 112.2 kDa. These secretory polypeptides possess protease, DNAase and RNAase activities.

[Laparoscopy in penetrating abdominal injuries]. / Laparoskopiia pri pronikaiushchikh reneniiakh briushnoi polosti.

An experience with treatment of 138 patients with penetrating punctured-incised wounds of the abdominal cavity has shown advantages of laparoscopy in diagnostics of the character of injuries of internals. Laparoscopy used in cases with difficult diagnosis allowed to give up operative interventions in 53.8% of patients. High diagnostic value and relative safety of laparoscopy make it possible to widely use this method in wounds of the abdomen.

[Mathematical model of Thiobacillus ferrooxidans growth on a medium with ferrous iron]. / Matematicheskaia model' rosta Thiobacillus ferrooxidans na srede s zakisnym zhelezom.

A mathematical model is proposed for the growth of Thiobacillus ferrooxidans in the process of Fe2+ oxidation depending on the active acidity and temperature of the medium. The model was used to establish the correlation between the action of temperature and pH of the medium on the bacterial growth and oxidation of Fe2+. The range of pH values which had no effect on the bacterium is broader at 28 degrees C (from 2.5 to 2.8) than at 12 degrees C (from 2.3 to 2.4). Apparently, the growth of the bacterium and the enzymatic processes of Fe2+ oxidation are more susceptible to changes in the pH than in temperature, at least when it is lowered to 12 degrees C.