The rates of Cryptosporidium infection in calves at cage and sectional management decreased to 2 month age with full elimination as while Eimeria prevalence values increased beginning from 20 day to 3 month age. At single examinations coccidian oocysts could not be detected in faeces of calves that is why one should perform repeated examination.

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Low-frequency electromagnetic field and hydrogel to increase survival rate and growth of European spruce (Picea abies L.) seedlings

FORESTRY BULLETIN (2021)

A.I. Smirnov F.S. Orlov P.A. Aksenov В. Ф. Никитин

This paper presents the results of a study that was conducted in the Sergiev Posad forestry of the Moscow region forestry Department with the participation of the laboratory of the Department of Forest crops, breeding and dendrology of the BMSTU (Mytishchi branch). This study shows the technology of planting European (Picea abies L.), seedlings in culture, which can significantly increase the survival rate of experimental samples and improve their biometric characteristics: height, diameter of the root neck, weight, and also the anatomical structure of seedlings. The experiments were performed using a low-frequency generator «Rost-Active», the author’s technology pre-sowing treatment of seeds and seedlings by an electromagnetic field, hydrogel (polymer water-retaining agent) and a method of histometric analysis of cross sections of control and experimental stems of European spruce seedlings. The results of the study indicate a clear positive effect of electromagnetic field and hydrogel on the increase in survival of experimental samples of seedlings of common European spruce in relation to the control. Also, the results of comparative histometric analysis indicate the effectiveness of methods for treating pine seedlings with low-frequency EMF and applying hydrogel to the soil.

10.18698/2542-1468-2021-1-45-52

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Комплексный препарат для лечения протозойных и острых желудочно-кишечных болезней у телят

Российский паразитологический журнал (2014)

С. Ш. Абдулмагомедов Р. М. Бакриева В. Ф. Никитин

The efficacy of a complex preparation (based on the antiprotozoal drug metronidazole) for treating associative course of cryptosporidiosis and colibacteriosis at a dose of 35 mg/kg and of the antibacterial drug levomicetine at a dose of 25 mg/kg is studied. Experiments were conducted on 110 calves with diarrhea signs. A complex preparation was administered to 75 animals of experimental group twice a day for 3-4 days. 35 calves of the control group were treated with antibiotics within 6-7 days according to the standard schedule. On the third day after treatment with the complex preparation the number of cryptosporidium oocysts in feces has been decreased, clinical status of calves has been improved, appetite restored, cattles recovered. Therapeutic efficacy of the complex preparation applied for treating associative course of cryptosporidiosis and colibacteriosis made 96,0 %, and of the base preparation 88,5 %. Course of treatment with the complex preparation has been reduced up to 3-4 days instead of 6-7 days when using a standard preparation.

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The use of detailed kinetics for modeling aerospace propulsion devices

Acta Astronautica (2022)

В. Ф. Никитин E.V. Mikhalchenko Л.И. Стамов

10.1016/j.actaastro.2022.09.045

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