ASSESSMENT OF DAMAGE AND EROSION WEAR OF THE ROTOR'SBLADES OF THE LAST TURBINE STAGES T-185/220-130 KIROV CHP-5

The assessment of damage and erosion wear of the rotor's blades of last stages of the turbine T-185/220-130 Kirov CHP-5 based on visual and ultrasonic examination, the photographs of the damages of the blades is done in the work.В работе дана оценка повреждений и эрозионного износа рабочих лопатокпоследних ступеней турбины Т-185/220-130 Кировской ТЭЦ-5 на основе визуального и ультразвукового исследования, приведены фотоснимки повреждений лопаток

Predicion of charge separation in GaAs/AlAs cylindrical Russian Doll nanostructures

We have contrasted the quantum confinement of (i) multiple quantum wells of flat GaAs and AlAs layers, i.e. (\GaAs)_{m}/(\AlAs)_n/(\GaAs)_p/(\AlAs)_q, with (ii) ``cylindrical Russian Dolls'' -- an equivalent sequence of wells and barriers arranged as concentric wires. Using a pseudopotential plane-wave calculation, we identified theoretically a set of numbers ($m,n,p$ and $q$) such that charge separation can exist in ``cylindrical Russian Dolls'': the CBM is localized in the inner GaAs layer, while the VBM is localized in the outer GaAs layer.Comment: latex, 8 page

ANTIOXIDANT ACTIVITY OF THE DRY EXTRACT RHAPONTICUM UNIFLORUM (L.) DC

A study of the antioxidant activity of the in vitro dry extracts DER-1 and DER-2 derived from Rhaponticum uniflorum (L.) DC. It was established that the extracts have pronounced antiradical activity against DPPH-radical binding (IC50 (DER-2) = 2.0 mkg/ml). When studying the effect of the dry extracts a number of reactive oxygen species (O•-2, NO) revealed that they exhibit their ability to inactivate. With respect to Of-anion radical extracts show moderate and against NO - expressed antiradical activity (IC50 (DER-2) = 311.0 mkg/ml). We also revealed the presence of moderate Fe2+-chelating activity of the extracts studied. This effect is caused by apparently content of phenolic compounds, phenol carbonic acids, triterpene saponins and tannins

Theory of anyon excitons: Relation to excitons of nu=1/3 and nu=2/3 incompressible liquids

Elementary excitations of incompressible quantum liquids (IQL's) are anyons, i.e., quasiparticles carrying fractional charges and obeying fractional statistics. To find out how the properties of these quasiparticles manifest themselves in the optical spectra, we have developed the anyon exciton model (AEM) and compared the results with the finite-size data for excitons of nu=1/3 and nu=2/3 IQL's. The model considers an exciton as a neutral composite consisting of three quasielectrons and a single hole. The AEM works well when the separation between electron and hole confinement planes, h, is larger than the magnetic length l. In the framework of the AEM an exciton possesses momentum k and two internal quantum numbers, one of which can be chosen as the angular momentum, L, of the k=0 state. Existence of the internal degrees of freedom results in the multiple branch energy spectrum, crater-like electron density shape and 120 degrees density correlations for k=0 excitons, and the splitting of the electron shell into bunches for non-zero k excitons. For h larger than 2l the bottom states obey the superselection rule L=3m (m are integers starting from 2), all of them are hard core states. For h nearly 2l there is one-to-one correspondence between the low-energy spectra found for the AEM and the many- electron exciton spectra of the nu=2/3 IQL, whereas some states are absent from the many-electron spectra of the nu=1/3 IQL. We argue that this striking difference in the spectra originates from the different populational statistics of the quasielectrons of charge conjugate IQL's and show that the proper account of the statistical requirements eliminates excessive states from the spectrum. Apparently, this phenomenon is the first manifestation of the exclusion statistics in the anyon bound states.Comment: 26 pages with 9 figures, typos correcte

ETHNIC FEATURES OF BLOOD LIPID PROFILE IN SIBERIANS AGED 60–69 YEARS

Aim. To study potential specific features of blood lipid profile in elderly indigenous and non-indigenous Yakutsk City residents, as well as in elderly Caucasian residents of Novosibirsk City.Material and methods. The representative sample of the non-institutionalised Yakutsk City population aged 60–69 years (main group, MG) included 159 people (69 men and 90 women; 41% of indigenous (Yakut) ethnicity and 59% of Caucasian ethnicity). The comparison group (CG) included 3949 Novosibirsk City residents who were participating in the international HAPIEE study (1834 men and 2115 women; 96% of Caucasian ethnicity).Results. The age-standardised blood lipid levels were similar in indigenous and non-indigenous Yakutsk City residents. The mean levels of total cholesterol (TCH) were 5,9 mmol/l in the whole sample, 5,8 mmol/l in men, and 6,1% mmol/l in women. In Yakut participants, these figures were 5,8, 5,7, and 5,9 mmol/l, respectively, while in Russian participants, they were slightly higher (6,0, 5,8, and 6,2 mmol/l, respectively). The levels of non-high density and low density lipoprotein cholesterol (nonHDL CH, LDL–CH) demonstrated similar gender and ethnic features. In non-indigenous Yakutsk City residents, the levels of TCH, LDL–CH, and high-density lipoprotein cholesterol (HDL–CH) were significantly lower than those in Novosibirsk City residents: 6,0 vs. 6,44 mmol/l for TCH (p<0,01); 3,9 vs. 4,2 mmol/l (p<0,01) for LDL–CH; and 1,44 vs. 1,52 mmol/l (p<0,05) for HDL–CH, respectively.Conclusion. In elderly indigenous residents of Yakutsk City, the levels of TCH, LDL–CH, non-HDL–CH, and triglycerides were slightly lower than those in non-indigenous Yakutsk City residents. In non-indigenous Yakutsk City residents, aged 60–69, the levels of TCH, non-HDL–CH, LDL–CH, and HDL–CH were lower than in their peers from Novosibirsk City

Застосування методу зважених відхилів для визначення розподілу температур та деформацій радіаційної повзучості в пластинах

The paper is devoted to the description of the Weighted Residuals Method in Galerkin form for solution of the non-stationary heat transfer and irradiation creep problems in rectangular plates. The basic methods and dependencies were used for the solution of these problems are considered. The non-stationary heat problem is derived to sequential decisions of the systems of linear algebraic equations for the coefficients in expansions of temperature function in series on the basis functions for the different time moments. The problem of rectangular plate’s bending with specified temperature drops in its sides is preliminary solved in order to obtain the solution of irradiation creep problem. The stress tensor components were found in the plate’s points, are used in associated flow rule for the obtaining the components of creep irradiation strain tensor. The non-stationary heat transfer problem in quadratic area with boundary conditions of Newton and Diriclet types is considered as well as the calculated temperature distributions on co-ordinates in plane and time are presented. The irradiation creep of rectangular plate made from high resistant steel 15Х1М1Ф is considered. Obtained distributions of irradiation creep strains for three regarded values of temperature drops allow us to evaluate the plate deformation and service ability at different time moments.Статья посвящена описанию применения метода взвешенных невязок в форме метода Галеркина для решения задач нестационарной теплопроводности и радиационной ползучести в прямоугольных пластинах. Рассмотрены основные зависимости, использованные для получения решений данных задач. Задача нестационарной теплопроводности сведена к последовательному решению систем линейных алгебраических уравнений для коэффициентов в разложении функции температур в ряд по базисным функциям для различных моментов времени. Для решения задачи радиационной ползучести предварительно рассматривается определение функции перемещения в задаче изгиба прямоугольной пластины при заданном перепаде температур на ее сторонах. Приведены примеры решения в форме распределений температур и деформаций радиационной ползучести в зависимости от координат и в различные моменты времени.Статтю присвячено опису застосування методу зважених відхилів у формі методу Гальоркіна для розв’язання задач нестаціонарної теплопровідності та радіаційної повзучості у прямокутних пластинах. Розглянуто основні залежності, які застосовано до отримання розв’язків даних задач. Задачу нестаціонарної теплопровідності зведено до послідовного розв’язання систем лінійних алгебраїчних рівнянь для коефіцієнтів при розкладенні функції температур у ряд за базисними функціями для різних моментів часу. Для розв’язання задачі радіаційної повзучості попередньо розглядається визначення функції переміщення у задачі згину прямокутної пластини при заданому перепаді температур на її сторонах. Наведено приклади розв’язання у вигляді розподілів температур та деформацій радіаційної повзучості за координатами та у різні моменти часу

Is it need a criterion LDL cholesterol in definition of metabolic syndrome?

The average content of LDL cholesterol obtained 138.8 ± 39.3 mg/dl, in natives, but non-natives have obtained similar values: 137.7 ± 38.5 and 140.8 ± 40.0 (Рn-nn = 0.56) in the general population sample of olders (n = 485 pers.). Average values of LDL cholesterol content in group without metabolic syndrome (MS–) obtained 126.1 ± 42.1 mg/dl, in MS (+) group – 150.7 ± 32.4 mg/dl (р = 0.0001) by RSSC 2009. Determine the frequency of elevated levels of LDL cholesterol (≥ 115 mg/dl) is 72.4 % in the general population, without significant difference between natives and non-natives. In MS (+) and MS (–) groups, the results of the frequency of hyper-LDL cholesterol obtained close in five definitions of MS. The differences in figures are not large and statistically significant (p > 0.1). And in only one case (by RSSC analysis) differences in the values of hyper-LDL between MS (+) and MS (–) groups received significant. Conclusion: High level of LDL cholesterol in all MS definitions has no significant differences in the frequency in MS (+) and MS (–) groups of elderly urban population of Yakutia, and also in comparison with population values of hyper-LDL. It allows to recognize that there is no reason to recommend in medical practice the use of the criterion LDL cholesterol in MS diagnosis

Synonymous Codon Usage, GC(3), and Evolutionary Patterns Across Plastomes of Three Pooid Model Species: Emerging Grass Genome Models for Monocots

We have analyzed factors affecting the codon usage pattern of the chloroplasts genomes of representative species of pooid grass family. Correspondence analysis of relative synonymous codon usages (RSCU) showed that genes on secondary axis were correlated with their GC(3S) values (all r 0.05), indicating mutational bias as an important selective force that shaped the variation in the codon usage among chloroplast genes. The Nc-plot showed that although a majority of the points with low-Nc values were lying below the expected curve, a few genes lied on the expected curve. Nc plot clearly showed that mutational bias plays a major role in codon biology across the monocot plastomes. The hydrophobicity and aromaticity of encoded proteins of each species were found to be other factors of codon usage variation. In the view of above light, besides natural selection, several other factors also likely to be involved in determining the selective constraints on codon bias in plastomes of pooid grass genomes. In addition, five codons (B. distachyon), seven codons (H. vulgare), and four codons (T. aestivum) were identified as optimal codons of the three grass chloroplasts. To identify genes evolving under positive selection, rates of nonsynonymous substitutions (Ka) and synonymous substitutions (Ks) were computed for all groups of orthologous gene pairs