Visnyk of Dnipropetrovsk University. Biology, medicine

8-14

Authors: M. S. Goncharenko, G. M. Timchenko

The paper describes the scientific basis of a complex estimation of functional state of the children's organisms as a whole and their adaptive responses to living conditions (anthropogenic stress, social conditions of training) depending on age and biorhythmic type. The scheme of complex estimation for the children's adaptive capacities, including estimation of functional state and functional parameters, considers age and biorhytmological characteristics. That scheme is presented as a methodological basis of the research. The necessity of determination of children's functional state depending on their age and biorhythmic type to control circadian rhythms of physiological functions is proved. It indicates the stability of the endogenous biological clocks due to interactions of nervous, endocrine, lymphatic, cardiovascular, urogenital and digestive systems.

23-27

Authors: N. S. Dyrda, O. A. Dregval, N. V. Cherevach, A. I. Vinnikov

The strain variation B-2-6 with a higher production of spores (3.93 × 109 КFU/ml in that variation vs 1.94 × 109 КFU/ml in the initial strain) and endotoxin (10.1 mcg/ml vs 4 mcg/ml respectively) was obtained by means of the ultraviolet irradiation of the В-2 strain Bacillus thuringiensis spores. Insecticidal activity of the obtained variation is characterized by the deaths of 64.3 % of the great brown twist Archips podana at the 3rd day and 97 % at the 10th day after the treatment, which is 20.4 % higher than B-2 strain activity. Possibility of the obtained variation implementation for the natural plants protection against the leaf-eating insects is under discussion.

33-40

Authors: A. V. Zhukov, T. M. Konovalova

The soil mounds emerged owing to the mole rats’ digging activity have been shown to be characterised by less electrical conductivity than surrounded soil. This effect is due to the changes of the mounds bulk’s density and moisture. The effect of the mole rats’ digging activity on the soil electrical conductivity has been found not to be restricted by the geometrical border of the mounds. The mounds are surrounded by 1–1.5 m halo of increased soil electrical conductivity. The halo size is increased with the aging of the mound and with the compacting of their aggregation.

49-55

Authors: O. N. Korinovskaya, V. N. Gryshko

The sensitivity of 33 micromycete species to nitric compounds of copper, lead, zinc, nickel and cadmium has been determined. Absidia butleri Lendn, Mortierella vanesae Dixon-Stewart, Cunninghamella echinulata Thaxte, Curvularia tuberculata Jain, Cladosporium cladosporiodes (Fresen) G. A. de Vries and Fusarium solani (C. Mart.) Appel et Wollenw are sensitive to minimal content of the heavy metals (0.75 of maximum permissible concentration (MPC)) in the growth medium. At the same time Trixoderma longibrachiatiim Rifai, Alternaria alternatа (Fr.) Keissl and Penicillium sp. 4 demonstrated moderate growth under maximal concentration (50 MPC). It is determined that minimal content of the heavy metals in the initial stage of influence (up to 48 h) promotes growth of only Fusarium oxysporum E. F. Sm. et Swingle, while retards growth of the other species.