Descriptive study of the flora of the "Relic Oaks" landscape reserve (Eastern Siberia) in the context of the protected area importance for maintaining biodiversity

The article shows the importance of specially protected areas for preserving the gene pool of rare and useful plants in Siberia on the example of the "Relic oaks" state landscape reserve. The landscape reserve is located on the territory of Eastern Siberia (Russia), on the two large floristic areas of Holarctic: Circumboreal and East-Asian. During the study, 696 species of higher vascular plants have been identified in the territory of the landscape reserve. The prevailing families are following: Asteraceae, Poaceae, Ranunculaceae, Rosaceae, Cyperaceae, Fabaceae, Caryophyllaceae, Brassicaceae, Apiaceae, and Scrophulariaceae. In the territory of landscape reserve, 4 floral complexes were identified: alpine, forest, steppe and meadow-alluvial, as well as 10 chorological groups. The feature of the flora was prevalence of forest and steppe plant species with the East Asian type of habitat. By the number of species, herbaceous plants in the landscape reserve dominate over arboreal plants, and shrubs have the largest share among arboreal plants. The spectrum of life forms of plants shows the climatic conditions of the territory at the border of large floral areas and zones of vegetation. On the studied territory, there are 171 species of higher vascular plants (24.5% of the total flora composition in the landscape reserve), are rare and protected in various regions of Siberia

Assessment of the diversity of vascular plants in phytocenoses with a share of Quercus mongolica on the territory of Relic Oaks State Reserve

In this paper, we assess the diversity of vascular plants in phytocenoses with Quercus mongolica (family Fagaceae) on the territory of the Relic Oaks State Reserve (Eastern Siberia, Transbaikal region), where Q. mongolica is located at the northwestern boundary of the areal. The descriptions of phytocenoses have been processed in the PAST3 application. The similarity of species composition has been determined using the Jaccard index. The resulting tree diagram shows two groups of descriptions at a similarity level of 0.14-0.15. The first group includes the descriptions of mixed forest quadrats, in which Q. mongolica is a co-edificator. The second group of descriptions presents the communities where Q. mongolica is the only species in the tree layer. The analysis of the tree diagram shows the dependence of species richness within the phytocenoses on the surface patterns and edaphoclimatic conditions. The phytocenoses located on steep southern slopes show less diversity

Seed morphology of some species in the family Gentianaceae

In this work, we investigated the outer and inner morphological characters of the seeds of 13 species in the family Gentianaceae. We also identified the main morphometric parameters and described the shape, coloration and sculpture of the seed surface. Some aspects of their internal structure were analyzed as well

ENERGY CONSERVATION AS ONE OF CRITERIA FOR ESTIMATION ELECTRICAL POWER SOLUTIONS

The paper deals with enlarged technical losses in electricity distribution devices of substations and power lines. Authors developed formula to calculate the annual values of power losses, the resulting expressions can be used as one of the criteria for estimation electrical power solutions.В работе рассматриваются укрупненные технические потери в элементах распределительных устройств подстанций и линий электропередач. Разработаны формулы для расчета значений годовых потерь электроэнергии, полученные выражения предлагается использовать как один из частных критериев оценки проектных решений

Pleiotropic effect of the ABCA1 rs2230806 polymorphism in cardiovascular diseases: a literature review

Cerebrovascular accident (CVA) in patients with various cardiovascular diseases is a life-threatening complication, the development of which can be contributed by both environmental and genetic factors, the understanding of which is necessary to determine the tactics of treatment and predict the disease course. The article presents a brief review of studies on genetic predictors of CVA, in particular the association of the ABCA1 rs2230806 polymorphism and the risk of CVA in cardiovascular patients. Targeted studies of associations of the ABCA1 rs2230806 polymorphism with cerebrovascular diseases in the Russian Federation, except for studies at our university, could not be found

Gas chromatographic-mass spectrometric analysis of high purity germane

Изучена возможность применения капиллярных адсорбционных колонок в сочетании с масс-спектрометрическим детектированием для определения содержания примесей в высокочистом германе. Исследовано влияние количества основного вещества на определение примесей. Увеличение количества дозируемого германа приводит к значительному уширению пиков примесей, расположенных на тыле его хроматографической полосы, и ограничивает снижение пределов их обнаружения. Исследован примесный состав германа. Определены примеси постоянных газов, углеводородов С₁-С₉, фтор-, хлорсодержащих и ароматических углеводородов, эфиров, сероводорода, гомологов германа, алкилпроизводных германа, хлоргермана. Примеси углеводородов С₆-С₉, тригермана, этилдигермана и ряда хлор-, фторсодержащих углеводородов определены впервые. Содержание отдельных примесей в германе высокой чистоты составляет 1.2∙10⁻³-2∙10⁻⁶ % об. Пределы обнаружения примесей составляют 5∙10⁻⁵-4∙10⁻⁸ % об. Достигнутые пределы обнаружения находятся на уровне лучших известных из литературы, а для ряда примесей ниже в 2-5000 раз. Правильность анализа подтверждена методом варьирования величины пробы и сравнением с результатами независимого газохроматографического анализа.The use of capillary adsorption columns in combination with mass spectrometric detection for determining the content of impurities in high-purity germane has been studied. The influence of the amount of the main substance on the separation and determination of impurities was investigated. Increase in the number of dosed germane leads to the substantial broadening of the peaks of impurities located at the end of its chromatographic band and limits the lowering of their limits of detection. The impurity composition of germane has been investigated. The impurities of permanent gases, hydrocarbons С₁-С₉, fluorine-, chlorine-containing and aromatic hydrocarbons, esters, hydrogen sulfide, homologs of germane, alkyl-derivatives of germane, and chlorogermane have been determined. It is for the first time that the impurities of С₆-С₉ hydrocarbons, trigermane, ethyl germane and a number of chlorine- and fluorine-containing hydrocarbons have been discovered. The content of the individual impurities in high-purity germane was 1.2∙10⁻³-2∙10⁻⁶ % vol. The achieved limits of detection correspond to the best results available in the literature and for a number of substances they are by 2-5000 times less. The accuracy of the analysis has been proven by the method of varying the sample volume and by comparison with the results of the independent gas-chromatographic analysis

GAS CHROMATOGRAPHIC-MASS SPECTROMETRIC ANALYSIS OF HIGH PURITY GERMANE

The use of capillary adsorption columns in combination with mass spectrometric detection for determining the content of impurities in high-purity germane has been studied. The influence of the amount of the main substance on the separation and determination of impurities was investigated. Increase in the number of dosed germane leads to the substantial broadening of the peaks of impurities located at the end of its chromatographic band and limits the lowering of their limits of detection. The impurity composition of germane has been investigated. The impurities of permanent gases, hydrocarbons С1–С9, fluorine-, chlorine-containing and aromatic hydrocarbons, esters, hydrogen sulfide, homologs of germane, alkyl-derivatives of germane, and chlorogermane have been determined. It is for the first time that the impurities of С6–С9 hydrocarbons, trigermane, ethyl germane and a number of chlorine- and fluorine-containing hydrocarbons have been discovered. The content of the individual impurities in high-purity germane was 1.2∙10–3-2∙10–6 % vol. The achieved limits of detection correspond to the best results available in the literature and for a number of substances they are by 2-5000 times less. The accuracy of the analysis has been proven by the method of varying the sample volume and by comparison with the results of the independent gas-chromatographic analysis.         Keywords: gas chromatography–mass spectrometry, germane, impurities, detection limit, trueness(Russian)DOI:http://dx.doi.org/10.15826/analitika.2015.19.1.010 V.A. Krylov1, 2,  O.Iu. Chernova1, A.Iu. Sozin1, A.D. Zorin 2 1G.G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, Russian Federation, Nizhny Novgorod 2N.I. Lobachevsky Nizhny Novgorod State University, Russian Federation, Nizhny Novgoro

Spatial variability of oil properties within oil fields of the Republic of Tatarstan

The purpose of this research is to establish the relation between variability of physical and chemical properties of oil and geodynamic activity of the oil fields of the Republic of Tatarstan on the basis of generalization, systematization and analysis of information on physical properties of oil collected during the period from 1956 to 2004. It has been experimentally established that oil extracted from reservoirs located within zones with low geodynamic activity differs a lot by its mean density from the oil related to geodynamically active areas. The results of the study show the significant role of processes of destruction and re-formation of oil deposits of the Tatar Arc and surrounding areas during the last neotectonic phase

Ecological and morphological features of Rhodiola rosea L. in natural populations in the Altai Mountains

The paper presents the results of the comprehensive study of Rhodiola rosea L. in natural populations in the Altai Mountains. The phytocoenotic confinement, demographic structure, and morphological characters of 9 coenopopulations of Rh. rosea were studied in different ecological and coenotic conditions in the Chemal and Kosh-Agach regions of the Republic of Altai. Correlation between the morphometric parameters and their calculated values for the shoot and sex of the studied individuals, as well as environmental factors, was revealed. Rhodiola rosea L. is a valuable medicinal plant used for functional diseases of the central nervous system. At present, the natural reserves and areas of natural growth of the golden root have decreased significantly. The species is included in the Red Data Book of the Russian Federation (2008) and many regional Red Data Books of Siberia. In the Altai Mountains, Rh. rosea is widespread throughout the highlands, where it has occupied a wide range of habitats. The study showed that the highest values of ecological and effective density are characteristic of coenopopulations which are part of various hygrophytic variants of alpine and subalpine miscellaneous herbs with a high total projective cover of the herbaceous layer (CP 1, 2, 3, 4). The lowest values were found for coenopopulations growing in communities with a scarce herbaceous layer or dense shrub layer, and on steep gravelly slopes with crumbling soil and nonuniform moisture distribution (CP 5, 6, 8, 9). The studied coenopopulations are normal, full-membered, or incomplete-membered (some of them lack postgenerative individuals). In terms of the ontogenetic spectra, they are mainly left-sided, with a predominance of young generative individuals (CP 4, 5, 7) or bimodal, with an additional peak for old generative individuals (CP 2, 3, 6, 8). Male and female individuals Rh. rosea differ in many morphometric characters of the generative shoots. In some coenopopulations (CP 2, 3, 6, 9), male and female individuals show multidirectional deviation of characters compared to the totality, which indicates that in different environmental conditions these characters are not only genetically determined but can also be related to the sex of individuals