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Количество страниц: 6 с.
- Чугунов Афанасий Васильевич > Труды и статьи,
- Прикладные науки. Медицина. Ветеринария. Техника. Сельское хозяйство > Сельское хозяйство. Лесное хозяйство. Охота. Рыболовное хозяйство,
- НАУКА ЯКУТИИ > ПРИКЛАДНЫЕ НАУКИ. МЕДИЦИНА. ТЕХНИКА. СЕЛЬСКОЕ ХОЗЯЙСТВО > Сельское хозяйство. Лесное хозяйство. Охота. Рыболовное хозяйство.
The article presents main results of comparative growth study and development of young animals, some biological features of local breeds: Yakut, Simmental and imported Kalmyk breed of cattle in Yakutia climate. The work was carried out in the subsidiary farm of the Yakut State Agricultural Academy. Experimental population consisted of 45 heads of bull calves, selected according to the method of pairs - analogues. We studied the technology of keeping and feeding, growth and development, the morphological and biochemical composition of blood, the physiological state of bull-calves of different breeds. Young animals (experimental group) energy growth was studied by the standard zootechnical method, which is weighing in every 3 months; hematological parameters were determined by hematological analyzer PCE-90Vet; total protein in the serum of blood was determined by a refractometric method; protein fractions - by electrophoresis method in the Yudelovich modification (5 heads from a group). The more intensive diurnal growth (increase) was established in the group of imported Kalmyk breed, which ensured the growing of bulls in this group by 20-30 kg alive weight than in peers (Yakut and Simmental cattle) at the same age. Young growth of Kalmyk cattle was distinguished by hypoalbumin and hyper gamma-2 globulin fractions of protein metabolism, which reflects the functional activity of their immune system in the conditions of the region.
Интенсивность роста и некоторые гематологические показатели молодняка разных пород скота Якутии / А. В. Чугунов, И. И. Слепцов, Н. М. Черноградская, Е. Н. Ильина, Н. И. Тарабукин // Наука и образование. — 2017. — N 4 (88), октябрь-декабрь. — С. 141-146.
Количество страниц: 6 с.
The purpose of this work is to study age-related changes in the critical values of blood pressure, heart rate and human temperature during the transition from the southern to the northern population groups. Volunteers of male and female (age from 17 to 79 years) of middle Russia (Moscow and the region), African countries and northern peoples of Siberia (Yakuts) took part in the work. Thermometry (thermometer in the armpit basin, 10 min) and tonometry (automatic tonometer "UA-787" offirm "AND ID Medical", Japan) were used as research methods. Age-related changes in the critical values of systolic and diastolic arterial blood pressure, heart rate and body temperature were established. Regional changes in critical physiological parameters associated with the regulatory influence of the autonomic nervous system (sympathetic and parasympathetic divisions) on the cardiovascular system are identified as one of the main compensatory and adaptive systems of the organism that participate in the processes of human adaptation to changes in environmental conditions.
Егоров, В. В. Возрастные и региональные изменения критических физиологических показателей сердечно-сосудистой системы организма человека / В. В. Егоров, О. Н. Колосова, Б. М. Кершенгольц // Наука и образование. — 2017. — N 4 (88), октябрь-декабрь. — С. 104-108.
Количество страниц: 6 с.
- Математика. Естественные науки > Ботаника,
- Прикладные науки. Медицина. Ветеринария. Техника. Сельское хозяйство > Сельское хозяйство. Лесное хозяйство. Охота. Рыболовное хозяйство,
- НАУКА ЯКУТИИ > МАТЕМАТИКА. ЕСТЕСТВЕННЫЕ НАУКИ > Ботаника,
- НАУКА ЯКУТИИ > ПРИКЛАДНЫЕ НАУКИ. МЕДИЦИНА. ТЕХНИКА. СЕЛЬСКОЕ ХОЗЯЙСТВО > Сельское хозяйство. Лесное хозяйство. Охота. Рыболовное хозяйство.
In conditions of the Middle Lena valley, a growth regulator was used for the first time as a stimulant, which increases the germination of seeds, stimulates the initial growth ofplants, promotes resistance to diseases and generally improves the adaptability of perennial grasses in the first years of life. In the studies, the growth stimulator Krezacin was used. "Krezacin" (trekazin, irkutin) is an immunostimulant, adaptogen of a new generation. It is usedfor active rooting and strengthening ofplant immunity in the first years ofplant life. The mechanism of its action is based on optimization of biosynthesis of proteins, nucleic acids, enzymes. The preparation acts on the cellular level and activates adaptive reactions of plants. The studied areas of field experiments were located in the Middle Lena valley at the scientific station ҺMarkhinskyһ of the Institute for Biological Problems of Cryo-lithozone of the SB RAS, located 13 km away from Yakutsk city. For the first time in the conditions of cryogenic floodplain layered soils, the influence of the growth stimulant Kresacin on linear growth, productivity, shoot formation and the structure of shoots of a smooth brome of the variety SibNIISKhoz-189 was studied. Over the years of study, it was proven that an effective dose of a growth stimulant Krezacin is 75 ml /10 l. Three years studies have established that soaking of smooth brome seeds with Krezacin in a given dose promotes an increase in the linear height of smooth brome up to 110.8 cm, the productivity of the above-ground mass by 2 times, an increase in the number of generative shoots by 1.8 times, vegetatively elongated shoots by 2.3 times and vegetatively shortened ones by 1.6 times. At the same time, the mass of one generative shoots of smooth brome is 3.5 g, which exceeds the control by 16 %, which indicates the maturity and usefulness of the sown phytocenosis.
Барашкова, Н. В. Влияние стимулятора роста "Крезацин" на рост и развитие костреца безостого в условиях долины средней Лены / Н. В. Барашкова, Е. Р. Неустроева // Наука и образование. — 2017. — N 4 (88), октябрь. -декабрь. — С. 99-103.
Количество страниц: 6 с.
- Математика. Естественные науки > Математика,
- НАУКА ЯКУТИИ > МАТЕМАТИКА. ЕСТЕСТВЕННЫЕ НАУКИ > Математика,
- Прикладные науки. Медицина. Ветеринария. Техника. Сельское хозяйство > Инженерное дело. Техника в целом,
- НАУКА ЯКУТИИ > МАТЕМАТИКА. ЕСТЕСТВЕННЫЕ НАУКИ > Физика,
- НАУКА ЯКУТИИ > ПРИКЛАДНЫЕ НАУКИ. МЕДИЦИНА. ТЕХНИКА. СЕЛЬСКОЕ ХОЗЯЙСТВО > Инженерное дело. Техника в целом.
This paper considers a mathematical model of joint laying of water pipeline networks and district heat networks. The purpose of the work is to study the effect of radiation on the process of complex heat exchange taking place in the housing insulation between structural elements. The results of mathematical simulation of the heat loss taking into account the radiant component are given. When calculating the heat flows which are lost in the pipeline through thermal insulation at transporting the coolant, the heat transfer process is usually considered by means of conduction and convection. The radiant component is neglected in most cases. The influence of heat transfer by radiation and convection is particularly noticeable using thermal insulation products with large pores and air gaps. A ground configuration of a pipe line and water pipe line laid in a joint thermal insulation made of mineral wool is considered. When laying joint pipelines, complex radiative heat transfer occurs. It consists, for each one of these pipelines, of radiation reflected from the other pipeline and self-radiation. A non-stationary temperature field of the structure, consisting of two parallel stacked pipes with different diameters lying in a joint insulating structure made of mineral wool, is calculated. The construction elements exchange heat with each other and the environment by convection and radiation.
Степанов, А. В. Оценка влияния лучистой составляющей на сложный теплообмен между сетевым трубопроводом и водопроводом при совместной прокладке / А. В. Степанова, Г. Н. Егорова // Наука и образование. — 2017. — N 4 (88), октябрь-декабрь. — С. 93-98.
Количество страниц: 6 с.
In this work a quantitative assessment of protruding active diamond particles on the working surface of an experimental diamond drill with a metal-ceramic matrix during its operation was done. Previously a literature review on the methods of determining of the amount of abrasive grains on the working surface of a tool was performed. The main advantages and disadvantages of the methods for determining the cutting edges during a tool operation are discussed. The formation of microroughness occurs as a result of frictional interaction of contact surfaces of abrasive tool and material being processed. During processing, a mass micro-cutting with individual grains occurs, which together determines the productivity of a tool as a whole. Thus, one of the factors increasing the efficiency of a diamond tools is its surface condition. Other factors are connected with the improvement of its components and functional elements: diamond grains, ligaments, working layer structure. In this work, quantitative assessment of active diamond grains on the working surface of a tool was realized on the basis of metallographic analysis of the friction surface. The proposed method for determining the amount of cutting diamond grains on the working surface of the experimental diamond drill make it possible to evaluate and predict service properties of a working surface of a tool when operating in full-scale conditions.
Количественная оценка содержания алмазных частиц на рабочей поверхности алмазного сверла / М. И. Васильева, П. П. Шарин, Г. Г. Винокуров, М. В. Федоров // Наука и образование. — 2017. — N 4 (88), октябрь-декабрь. — С. 88-92.
Количество страниц: 6 с.
The article is devoted to the problem of wear and tear ofparts of mining equipment working with frozen soils under low climatic temperatures and the development of a method for restoring the crowns of excavator buckets teeth and bulldozer ripper with increased performance characteristics. Deposited layers obtained by overlaying surfacing with self-shielded flux cored wire and surfacing electrodes T590 (widely used in production) for surfacing with direct current and pulse mode modulated current are investigated. It is shown that when surfacing by a pulse-arc method with T590 electrodes, the content of the main alloying elements (manganese, silicon, nickel, chromium) in the weld layer is higher than in the case of surfacing by a direct current. It has been established that the microhardness of the deposited layers at surfacing by direct current is greater than when surfacing with modulated current. The way of rework of geometrical sizes of worn-out details of mining equipment using electrodes of the E-50A type at pulsed arc welding and further hardening of a surface layer of rework details using coating material with the increased physicomechanical properties is offered. Full-scale tests of the details reworked by this method and further operation at the enterprises of the Republic of Sakha (Yakutia) have shown their operability and economic reasonability.
Способ восстановления деталей горнодобывающей техники, эксплуатирующейся в условиях Севера / Н. И. Голиков, Ю. Н. Сараев, Р. П. Тихонов, С. В. Семенов, К. В. Степанова, Н. Н. Харбин // Наука и образование. — 2017. — N 4 (88), октябрь-декабрь. — С. 82-87.
Количество страниц: 6 с.
Potential of GPR data for evaluation of rocks humidity is considered. A method for evaluation of humidity of dispersed rocks by an empirical formula is proposed, which is based on determination of a relative change in the delay time (N) of GPR signals reflected from interfaces of media in frozen (tM, ns) and thawed (tT, ns) condition. The method was tested in field conditions at two sites in Central Yakutia. The GPR data are considered within an active layer, in a period of complete freezing and defrosting of the rocks. In the first site of testing the data values were taken from a part of a profile in the vicinity of the borehole test drilling. The average time delay of a GPR signal from the reference boundary at the depth of 1.7 m was calculated by three neighboring points of sounding. The relative change of the delay time of the signals Nt is evaluated. The average humidity content is calculated by the proposed formula. In accordance with the method the humidity distribution along the GPR profile in the second site of testing is also determined. Application of the method will allow to evaluate humidity of dispersed rocks remotely and its changes under the influence of various climatic and anthropogenic factors within the active layer of the permafrost zone rock mass.
Федорова, Л. Л. Методика георадиолокационной оценки влажности дисперсных горных пород / Л. Л. Федорова, Г. А. Куляндин // Наука и образование. — 2017. — N 4 (88), октябрь-декабрь. — С. 72-76.
Количество страниц: 8 с.
- Математика. Естественные науки > Геология. Геологические и геофизические науки,
- Прикладные науки. Медицина. Ветеринария. Техника. Сельское хозяйство > Сельское хозяйство. Лесное хозяйство. Охота. Рыболовное хозяйство,
- НАУКА ЯКУТИИ > МАТЕМАТИКА. ЕСТЕСТВЕННЫЕ НАУКИ > Геология. Геологические и геофизические науки,
- НАУКА ЯКУТИИ > ПРИКЛАДНЫЕ НАУКИ. МЕДИЦИНА. ТЕХНИКА. СЕЛЬСКОЕ ХОЗЯЙСТВО > Сельское хозяйство. Лесное хозяйство. Охота. Рыболовное хозяйство.
In view of climate warming, there is a need for parameterization of boundary conditions in predictive assessments of the ground temperature regime in cold regions. For this, an experimental study has been conducted at the Tuymaada monitoring site of Melnikov Permafrost Institute of the SB RAS to investigate the ground thermal regime following the removal of snow and vegetation covers. Field data have been collected for a two-year cycle. These data are compared with the findings from a similar study performed by A. V. Pavlov in the early 1970s. During this period, the mean annual air temperature has increased by 2.6 °C. As a result, the mean annual ground temperature at a depth of 3 m has warmed by 0.6 °C at the undisturbed site and by 1.4 °C at the disturbed site, with the ground properties remaining virtually unchanged. It is therefore evident that the current changes in climate and its elements should be taking into account during engineering design and ground temperature regime forecasts.
Варламов, С. П. Температурный режим почвогрунтов при нарушении покровов в современных климатических условиях Центральной Якутии / С. П. Варламов, А. Ф. Жирков, Д. А. Находкин // Наука и образование. — 2017. — N 4 (88), октябрь-декабрь. — С. 65-71.
Количество страниц: 4 с.
This article presents a review of the literature. The authors conducted a scientific search on the epidemiology of obesity and overweight in different ethnic groups. Most of the epidemiological studies conducted to identify obesity and overweight used the most accessible method - the determination of body mass index. Data on ethnic origin can provide additional information for a personalized prognosis; to date, there is no single classification for obesity and overweight for Asians.
Ожирение в различных этнических популяциях / О. Л. Москаленко, О. В. Смирнова, Э. В. Каспаров // Якутский медицинский журнал. — 2019. — N 3 (67). — С. 101-104.
DOI: 10.25789/YMJ.2019.67.28
Количество страниц: 6 с.
- Математика. Естественные науки > Общая биология. Антропология. Вирусология. Микробиология,
- Прикладные науки. Медицина. Ветеринария. Техника. Сельское хозяйство > Медицина > Анатомия. Физиология,
- НАУКА ЯКУТИИ > МАТЕМАТИКА. ЕСТЕСТВЕННЫЕ НАУКИ > Общая биология. Антропология. Вирусология. Микробиология,
- НАУКА ЯКУТИИ > ПРИКЛАДНЫЕ НАУКИ. МЕДИЦИНА. ТЕХНИКА. СЕЛЬСКОЕ ХОЗЯЙСТВО > Медицина.
Northern climatic factors lead to significant changes in human’s physiological functions based on modified functional condition of the endocrine system, metabolic processes, and lipid metabolism in particular. Adequate assessment and correct interpretation of lipid metabolism variables are of major importance for early detection and timely prevention of cardiovascular pathology. The review considers key lipid metabolism indices. We also present our own data about the role of compound indices in lipid metabolism assessment in healthy inhabitants of the North.
Индексы липидного обмена в ранней диагностике сердечно-сосудистой патологии у человека на Севере / Е. Р. Бойко, А. М. Канева // Якутский медицинский журнал. — 2019. — N 3 (67). — С. 96-101.
DOI: 10.25789/YMJ.2019.67.27