[Lectin and mitotic activities in root meristems of winter wheat under oryzalin effect].

The effect of oryzalin, a microtubule polymerization inhibitor (10 MM), on lectin and mitotic activities (mitotic index and duration of mitotic phases) was studied in unhardened (23 degrees C) and hardened (7 days, 2-3 degrees C) winter wheat seedlings. Three wheat cultivars differing in their frost tolerance were compared. Oryzalin treatment (3 h) decreased activity of soluble lectins, increased activity of cell wall lectin mitotic index.

[Effect of modification of cell calcium status on lectin activity].

Effects of oryzalin (10 microM), an inhibitor of microtubule polymerization, on the activity of soluble and cell wall lectins were studied in 7 day-old seedlings of unhardened (23 degrees C) and cold acclimated (7 days at 2-3 degrees C) winter wheat (Triticum aestivum L.). Seedlings were grown in the presence of 25 microM and 1 mM Ca2+, 500 microM verapamil, 250 microM chlorpromazine or without modifiers of calcium status in the medium.

[Effect of sodium selenite and alpha-tocopherol on the microcirculation in massive blood loss in dogs].

Effect of little doses of sodium selenite combined with alpha-tocopherol on microcirculation was studied in experimental bloodletting in dogs. It was established that more rapid recovery, as compared to control, of blood flow in the visceral basin and more rapid elevation of arterial blood pressure after massive bloodletting occur following the pretreatment with sodium selenite at a dose of 30 micrograms/kg and alpha-tocopherol at a dose of 25 mg/kg. The blood flow gets recovered in small vessels (arterioles, vanules and capillaries) while in controls it recovers largely in greater vessels.

[Patterns in the formation of proteolytic enzymes by different strains of C1. botulinum type F].

The authors studied regularities attending the accumulation of proteolytic enzyme and toxin by C1. botulinum, type F, strains in the medium. Strains No.

[Contamination of fish by agents of botulism type F and differentiating it from type E].

A total of 1859 samples of fish and various sea animals were examined for contamination with causative agent of botulism. The cultural fluid of 4--5-day cultures of the samples was tested in the reaction of neutralization with the diagnostic antitoxic antibotulin sera. types A, B, C, E.

[Deaminase activity of Cl. botulinum type A, B, E and F cultures].

The authors present the results of a comparative study of desaminase activity in the suspensions of resting cells and in ultrasonic desintegrates of cells of Cl. botulinum types A, B, E and F against a number of amino acids and their amides. It was shown that types A, B, E and F possessed active desamination enzymes; this process, however coursed with a different degree of intensity depending on the substrate.