DSpace Собрание: Научные публикации, проиндексированные в SCOPUS и WoS CC
https://elar.usfeu.ru/handle/123456789/8759
Научные публикации, проиндексированные в SCOPUS и WoS CC
2024-03-27T09:40:01Z
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Сезонная динамика содержания компонентов антиокислительной системы хвои сосны обыкновенной (Pinus sylvestris L.) в зоне локального теплового воздействия
https://elar.usfeu.ru/handle/123456789/12662
Название: Сезонная динамика содержания компонентов антиокислительной системы хвои сосны обыкновенной (Pinus sylvestris L.) в зоне локального теплового воздействия
Авторы: Shavnin, S. A.; Yusupov, I. A.; Montile, A. A.; Golikov, D. Y.; Marina, N. V.; Шавнин, С. А.; Юсупов, И. А.; Монтиле, А. А.; Голиков, Д. Ю.; Марина, Н. В.
Аннотация: The seasonal changes in a period of low temperatures and characteristic correlations of some antioxidant system (AOS) components in pine needles influenced by a gas flare are investigated in this study. The parameters taken are total water content (TWC) in needles, peroxidase activity (AP) and selected elements of the antioxidant system of needles, such as content of carotenoids (Car), ascorbic acid (AA), catechins (Cat) and flavanols (Fl). The needles come from Scots pine trees (Pinus sylvestris L.), which grow in a gradient of environmental conditions formed in the zone of thermal field of the gas flare impact (at various distances). The gas flare is situated on the territory of the Khanty-Mansiysk Autonomous Okrug (UGRA) of Russia. Three hypotheses were subject to verification: 1) the thermal field of the gas flare during the low temperature period affects the water exchange and the AOS state of needles; 2) increase in temperature of the environment in the flare impact zone during the autumn-winter period causes the decrease in amount of moisture in needles, which is a trait of oxidative stress in cells; 3) in the functioning of a needle's AOS, there are correlations between its components, which values depend on distance from the gas flare and environment created by it. It was found that in the thermal field gradient of the flare, there is neither an additional reduction in TWC in needles compared to the background nor signs of change in the state of AOS corresponding to the oxidative stress in the cells. The greatest impact of the gas flare on characteristics of the physiological state of pine needles is observed in the section closest to the flare. It reveals in the higher values of AP, TWC, Car and decrease in concentration of Fl and AA. The seasonal dynamics of the studied traits values do not correlate with the temperature of the environment. It indicates the indirect effect on the regulation of needle's AOS activity. The factor and correlation analysis of the data indicate a difference in physiological state of pine needles at different distances from the flare. There is no domination of any processes in the functioning of AOS components. The observed correlations between the studied properties change according to distance to the flare. The most stable is a negative AP relationship with ofter parameters, which rise with the increased distance from the flare. The consistency degree of separate AOS components functioning is maximal in background conditions and decreases when approaching the flare. This fact is explained by the modifying effect of the flare on physiological and biochemical processes of the needle's adaptation to specific climatic conditions of the environment.; Исследовали сезонные изменения в период низких температур и характер корреляционных связей для содержания общей воды в хвое, пероксидазной активности и содержания отдельных компонентов антиокислительной системы хвои: каротиноидов, аскорбиновой кислоты, катехинов и флавонолов – у деревьев сосны обыкновенной (Pinus sylvestris L.), произрастающих в градиенте условий среды, формируемых в зоне влияния теплового поля газового факела (на разном удалении от него) на территории Ханты-Мансийского автономного округа – Югры (Россия). Проверены 3 гипотезы: 1) тепловое поле газового факела в условиях низких температур влияет на водный обмен и состояние антиокислительной системы хвои; 2) повышение температуры среды в зоне влияния факела в осенне-зимний период приводит к уменьшению количества влаги в хвое, которое вызывает состояние окислительного стресса в клетках; 3) в работе антиокислительной системы хвои между ее отдельными компонентами существуют взаимосвязи, характеристики которых трансформируются в зависимости от условий среды, определяемых удалением от газового факела. В градиенте действия теплового поля факела не наблюдается дополнительного по сравнению с фоном снижения содержания общей воды в хвое и признаков изменения состояния антиокислительной системы, характерных для окислительного стресса. Влияние газового факела на показатели физиологического состояния хвои максимально на ближней к факелу секции. Оно проявляется в виде увеличения пероксидазной активности, количества общей воды, каротиноидов и в снижении содержания флавоноидов и аскорбиновой кислоты. Сезонная динамика изученных показателей не коррелирует с температурой среды, что говорит о ее непрямом действии на регуляцию активности антиокислительной системы хвои. Факторный и корреляционный анализ данных свидетельствуют об отличии физиологического состояния хвои на разном удалении от факела. В функционировании компо- нентов антиокислительной системы хвои не наблюдается доминирования отдельных процессов. Взаимосвязи между изученными показателями изменяются с удалением от факела. Наиболее устойчивой является отрицательная связь пероксидазной активно- сти с остальными показателями, усиливающаяся с увеличением расстояния до факела. Степень согласованности работы отдельных компонентов антиокислительной системы максимальна в условиях фона и уменьшается с приближением к факелу. Это объясняется модифицирующим влиянием факела на физиолого-биохимические
2023-01-01T00:00:00Z
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An Investigation of Complexes of Lignin Found in Plant Raw Materials as a Natural Binder in Obtaining Plastic in Closed Molds
https://elar.usfeu.ru/handle/123456789/12660
Название: An Investigation of Complexes of Lignin Found in Plant Raw Materials as a Natural Binder in Obtaining Plastic in Closed Molds
Авторы: Artemov, A. V.; Buryndin, V. G.; Krivonogov, P. S.; Savinovskikh, A. V.; Kolpakova, M. V.; Stoyanov, O. V.
Аннотация: Abstract: It has been suggested that lignin of wood and plant origin is directly involved in the formation of plastics without the addition of binders due to the formation of a net structure. The performed studies using DSC showed the presence of two peaks under the influence of temperature and water—hydrolytic destruction of the lignin–carbohydrate complex and further polycondensation of its “fragments” into a cross-linked polymer with the formation of plastic. The use of catalysts such as polyoxometalates (by the example of manganese-containing sodium vanadomolybdophosphate) makes it possible to carry out preliminary partial destruction of lignin and obtain plastics under “softer” conditions. In this case, it is necessary to take into account the different chemical structure and lignin content in the initial molding material, which determines not only the conditions for obtaining, but also the properties of the resulting material. © 2023, Pleiades Publishing, Ltd.
2023-01-01T00:00:00Z
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Justification of technologies of minimum (surface) tillage
https://elar.usfeu.ru/handle/123456789/12659
Название: Justification of technologies of minimum (surface) tillage
Авторы: Iovlev, G. A.; Pobedinsky, V. V.; Goldina, I. I.; Zorkov, V. S.; Nesgovorov, A. G.
Аннотация: With the modern development of agricultural production, the introduction of resource-saving technologies, technologies based on intelligent systems, there is a need to introduce a system of machines for the implementation of surface tillage technologies (mini-till, no-till). The main factor largely determining the choice of an agricultural machine, its working bodies, and processing technology are the agrophysical properties of the soil. The research was based on experiments to determine the hardness after various types of treatment of various soils with different granulometric composition. The research was carried out for one year (autumn 2021, spring 2022, autumn 2022), a total of 12 fields were examined, the sample was about 300 measurements. As a result, mathematical dependences were obtained for determining the change in the depth of processing at different soil hardness and the working speed of the machine-tractor unit when performing the technological operation cultivation to a depth of 10 cm. Theoretical studies on the effect of different soil hardness and working speed on the resistivity of the cultivator were carried out according to the formulas of Kirtbay Yu.K. (1982) and Iofinov S.A. (1985). When processing experimental data obtained in determining the resistivity on soils of different hardness and different operating speeds, using the Matlab program, more precise mathematical dependences were obtained that determine the dependence of resistivity on the operating speed on soils with different hardness. Calculations on the formation of optimal aggregates of tractors with toothed chain harrows, performed considering theoretical and experimental studies on the effect of soil hardness and operating speeds on processing depth and resistivity revealed that the optimal unit with a harrow with a working width of 12 m is the Belarus 2022 + BZC-12 unit, with a harrow width of 18 m and 24 m - in a unit with a tractor K-744R1. © The Authors, published by EDP Sciences.
2023-01-01T00:00:00Z
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Characterization of the size and spatiotemporal structure of the cenopopulation Caragana arborescens Lam. in the forest park of Yekaterinburg
https://elar.usfeu.ru/handle/123456789/12655
Название: Characterization of the size and spatiotemporal structure of the cenopopulation Caragana arborescens Lam. in the forest park of Yekaterinburg
Авторы: Montile, A.; Tishkina, E.; Filisteev, A.
Аннотация: The article is devoted to the study of the dimensional and space-Time structure of Caragana arborescens Lam. in various ecological and cenotic conditions in the forest park named after. Foresters of Russia in Yekaterinburg on the basis of population and organismal parameters. For the first time, a quantitative characteristic of the manifestation of organismal indicators in each ontogenetic state of the caragana was obtained. Regularities in the manifestation of traits depending on the ontogenetic conditions of plants and forest type, as well as features of changes in traits that occur during the growth of individuals during the life period, are revealed. Features of the average values of the manifestation of traits in ontogenetic states can be associated with the number of individuals of a given state in the corresponding samples, while there is an influence of habitat conditions. A one-way analysis of variance, in which the habitat type of a coenopopulation fragment was a factor, showed a significant effect of the factor for traits of crown height and width. Significant differences in these traits of the habitat of the mixed herb meadow from other habitats and the reduced values of the traits in the forb pine forest are explained by the predominance of medium generative individuals in the first case, and juvenile individuals in the second. The ability of the species to successfully adapt in fragmented and urbanized areas affected by recreational impacts and other forms of pollution and survive in a wide range of environmental conditions has been established. © 2023 EDP Sciences. All rights reserved.
2023-01-01T00:00:00Z