Prevention of viral hepatitis of ducks     

M G Nikitin  I I Panikar  G Ia Kononiuk  E I Starkov  M K Kharagezov 《Veterinariia》1973,(4):58-59

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Prevention of metrorrhagia in cows     

V Ia Nikitin  G P Nezhdanov  L G Nezhdanova 《Veterinariia》1973,49(6):75-77

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Economic effectiveness of antiepizootic measures in Aujeszky's disease of swine     

G Kh Kamalov  I N Nikitin 《Veterinariia》1973,49(5):71-72

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The rational periods for insemination of cows     

V Ia Nikitin 《Veterinariia》1966,43(3):89-91

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Molecular Biological Characteristics of Soil Microbiome in the Northern Part of the Novaya Zemlya Archipelago     

Nikitin  D. A.  Lysak  L. V.  Badmadashiev  D. V. 《Eurasian Soil Science》2022,55(8):1106-1115

Eurasian Soil Science - Microbiomes of strongly skeletal residual calcareous pelozems (Skeletal Leptosols (Loamic)), carbopetrozems (Calcaric Leptosols (Protic)), petrozems (Skeletal Leptosols...  相似文献   

Microbial biomass and biological activity of soils and soil-like bodies in coastal oases of Antarctica     

D. A. Nikitin  O. E. Marfenina  A. G. Kudinova  L. V. Lysak  N. S. Mergelov  A. V. Dolgikh  A. V. Lupachev 《Eurasian Soil Science》2017,50(9):1086-1097

The method of luminescent microscopy has been applied to study the structure of the microbial biomass of soils and soil-like bodies in East (the Thala Hills and Larsemann Hills oases) and West (Cape Burks, Hobbs coast) Antarctica. According to Soil Taxonomy, the studied soils mainly belong to the subgroups of Aquic Haploturbels, Typic Haploturbels, Typic Haplorthels, and Lithic Haplorthels. The major contribution to their microbial biomass belongs to fungi. The highest fungal biomass (up to 790 μg C/g soil) has been found in the soils with surface organic horizons in the form of thin moss/lichen litters, in which the development of fungal mycelium is most active. A larger part of fungal biomass (70–98%) is represented by spores. For the soils without vegetation cover, the accumulation of bacterial and fungal biomass takes place in the horizons under surface desert pavements. In the upper parts of the soils without vegetation cover and in the organic soil horizons, the major part (>60%) of fungal mycelium contains protective melanin pigments. Among bacteria, the high portion (up to 50%) of small filtering forms is observed. A considerable increase (up to 290.2 ± 27 μg C/g soil) in the fungal biomass owing to the development of yeasts has been shown for gley soils (gleyzems) developing from sapropel sediments under subaquatic conditions and for the algal–bacterial mat on the bottom of the lake (920.7 ± 46 μg C/g soil). The production of carbon dioxide by the soils varies from 0.47 to 2.34 μg C–CO₂/(g day). The intensity of nitrogen fixation in the studied samples is generally low: from 0.08 to 55.85 ng С₂Н₄/(g day). The intensity of denitrification varies from 0.09 to 19.28 μg N–N₂O/(g day).  相似文献