[Diagnostic capabilities of ultrasound biomicroscopy in phaco surgery].

Capabilities of ultrasound biomicroscopy (UBM) as a diagnostic method for surgical planning and outcome analysis in nonstandard situations in phaco surgery have been investigated. The study enrolled 270 patients (278 eyes) with pseudophakia and 26 patients (33 eyes) with aphakia. The scanning was done on OTI HF 35-50 Ultrasound System biomicroscope (UBM) - OTI, Canada.

[Regulation of key enzymes of L-alanine biosynthesis by Brevibacterium flavum producer strains].

The mechanisms of L-alanine overproduction by Brevibacterium flavum producer strains were studied. It was shown that beta-CI-L-alanine is an inhibitor of some key enzymes involved in the synthesis of L-alanine, including alanine transaminase and valine-pyruvate transaminase. Two highly active B.

[Catalytic properties of enzymes from Erwinia carotovora involved in transamination of phenylpyruvate].

Km for L-phenylalanine, L-glutamic acid, L-aspartic acid, and the corresponding keto acids were calculated, as well as Vmax, was measured for the following pairs of substrates: L-phenylalanine-2-ketoglutarate, L-phenylalanine-oxaloacetate, L-glutamic acid-phenylpyruvate, and L-aspartic acid-phenylpyruvate for aminotransferases PATI, PAT2, and PAT3 from Erwinia carotovora catalyzing transamination of phenylpyruvate. The ping-pong bi-bi mechanism was shown for the studied aminotransferases. The substrate inhibition (Ks) of PAT3 with 2-ketoglutarate and oxaloacetate was 10.

[Crystal formation peculiarities in pigmented cultures of Bacillus thuringiensis].

A direct correlation has been established between pink-colored pigmentation and the production of insecticide crystals (toxins) for some Bacillus thuringiensis (BT) pigmented cultures. This regularity was for the first time determined by us for BT strains ofthe H3, H10, and H16 serotype. Pigment-free clones of these serotypes do not produce crystals.

[Ultrasound biomicroscopy in diagnosis of uveal tumors].

Detailed analysis of ultrasound biomicroscopy (UBM) scanogrammes of 232 patients (232 eyes), aged 4-78 years old, with various uveal lesions was performed including comparison with morphologic study of specimens obtained after tumor removal. Results of the study showed UBM to allow to obtain objective data on location, configuration, size and structure of lesions of iris, ciliary body and preequatorial choroid. In a number of cases UBM virtually is the only option of vital visualization of the whole tumor.