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Institution

Russian State Agricultural University

EducationMoscow, Russia
About: Russian State Agricultural University is a education organization based out in Moscow, Russia. It is known for research contribution in the topics: Population & Materials science. The organization has 80 authors who have published 61 publications receiving 446 citations.


Papers
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Journal ArticleDOI
TL;DR: The morphometric analysis and the bone-breaking strength tests can prove the higher resistance to limb disorders in the domestic Brown Swiss and Red Steppe livestock bred for a long time under the strong pressure of natural selection when compared to the American Holsteins imported into the North Caucasus area and kept under the effect of hypokinesia.
Abstract: Monitoring of the morbidity caused by limb disorders has been conducted. The morphofunctional status and the strength of the bone system in the cattle of domestic selection compared to the imported animals in the modern cattle industrial system were determined. The morphological properties of the experimental animal locomotor apparatus were analyzed with the methods of V.Ya. Brovar. Limb bone physical properties were examined for tension-compression with a UIM 10 universal test device. The ultimate compressive bone strength was estimated with the ratio of the maximum applied load that the bone sample could sustain to the area of that sample. The surveys proved that the higher limb disease rates both in the absolute (per 58–72 head) and relative units (19.3–24.4%) were recorded in the American Holstein cows compared to the domestic cattle populations. It was ascertained that it required significantly more effort to destroy a bone sampled from the animals of a domestic population than the material obtained from the imported livestock. With respect to the metacarpal and metatarsal bones, the differences comprised 888–1315 kg (P > 0.95–0.99) and 937–1335 kg (P > 0.95), respectively. The bone-breaking strength in the Brown Swiss, Red Steppe, and American Holstein animals comprised 374.6 kg/cm2, 359.3 kg/cm2, and 291.7 kg/cm2, respectively. This indicates the greater bone-strength properties in the animals of the domestic populations, which can provide the opportunity to keep them both in the distant high-pasture system and the stall housing system. The morphometric analysis and the bone-breaking strength tests can prove the higher resistance to limb disorders in the domestic Brown Swiss and Red Steppe livestock bred for a long time under the strong pressure of natural selection when compared to the American Holsteins imported into the North Caucasus area and kept under the effect of hypokinesia.
Journal ArticleDOI
TL;DR: In this article , the authors describe the features of the formation of the structure of gas-thermal coatings and propose an approach to modeling technological processes of forming the structure and an assessment of their functional characteristics.
Abstract: This paper describes the features of the formation of the structure of gas-thermal coatings. Statistical methods for constructing mathematical models of the process are examined, on the basis of which the regularities of the influence of technological modes on the distribution of the thickness of plasma coatings are established, recommendations are developed for choosing their optimal values, guaranteeing the production of layers with uniform thickness. The paper proposes an approach to modeling technological processes of forming the structure of plasma coatings and an assessment of their functional characteristics. The results of experimental studies illustrating the performance of the developed optimization technology are presented.

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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20239
202210
20219
20208
201910
20184