443 research outputs found

    RETURNABLE BAKING WASTE — A NEW TYPE OF RAW MATERIALS FOR DISTILLATES PRODUCTION (PART I. BIOCHEMICAL COMPOSITION OF RAW MATERIALS)

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    The paper gives an assessment of biochemical composition of various types of returnable baking waste, pregrouped into five groups depending on recipe and bakery products production method, in comparison with traditional types of starch-containing raw materials — wheat and rye. It has been established that returnable baking waste has significant advantages over grain raw materials in terms of starch content and structural and mechanical properties, which will eliminate grinding cost. An analysis of carbohydrate complex of returnable baking waste showed that waste groups that include rye flour contain more glucose than groups derived from wheat flour, which can positively affect the fermentation process. The study of protein complex revealed that mass fraction of soluble protein was determined by type of raw material used to produce products. It is shown that the best raw materials for distillates production, from standpoint of protein complex evaluating, are samples of returnable baking waste products obtained from rye-wheat bread. The mineral composition (K+, Na+, Ca++, Mg++) of ash of various waste types was studied and it was found that products from wheat flour contain less potassium, calcium and magnesium than from rye-wheat, and no significant differences were found in sodium content. Identified distinctive features in biochemical composition of certain groups of returnable baking waste products are recommended to be taken into account when developing optimal technological regimes for their processing in distillates production.The paper gives an assessment of biochemical composition of various types of returnable baking waste, pregrouped into five groups depending on recipe and bakery products production method, in comparison with traditional types of starch-containing raw materials — wheat and rye. It has been established that returnable baking waste has significant advantages over grain raw materials in terms of starch content and structural and mechanical properties, which will eliminate grinding cost. An analysis of carbohydrate complex of returnable baking waste showed that waste groups that include rye flour contain more glucose than groups derived from wheat flour, which can positively affect the fermentation process. The study of protein complex revealed that mass fraction of soluble protein was determined by type of raw material used to produce products. It is shown that the best raw materials for distillates production, from standpoint of protein complex evaluating, are samples of returnable baking waste products obtained from rye-wheat bread. The mineral composition (K+, Na+, Ca++, Mg++) of ash of various waste types was studied and it was found that products from wheat flour contain less potassium, calcium and magnesium than from rye-wheat, and no significant differences were found in sodium content. Identified distinctive features in biochemical composition of certain groups of returnable baking waste products are recommended to be taken into account when developing optimal technological regimes for their processing in distillates production

    Results of investigation of muon fluxes of superhigh energy cosmic rays with X-ray emulsion chambers

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    The overall data from the investigation of the cosmic ray muon flux in the range of zenith angles (0-90) deg within the energy range (3.5 to 5.0) TeV is presented. The exposure of large X-ray emulsion chambers underground was 1200 tons. year. The data were processe using the method which was applied in the experiment Pamir and differred from the earlier applied one. The obtained value of a slope power index of the differential energy spectrum of the global muon flux is =3.7 that corresponds to the slope of the pion generation differential spectrum, gamma sub PI = 2.75 + or - .04. The analysis of the muon zenith-angular distribution showed that the contribution of rapid generation muons in the total muon flux agree the best with the value .2% and less with .7% at a 90% reliability level

    Pharmacological correction of immune disorders in patients with chronic heart failure and ischemic heart disease

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    Currently, there are few data on the effect of cardiovascular drugs on the immune status of patients with heart failure (HF). This paper provides information on the impact of ß-adrenergic blocking agent (BAB), angiotensin-converting enzyme inhibitors (ACEI) on the maintenance of markers of immune inflammation in the blood, as well as on inhibition of synthesis of tumor necrosis factor-α (TNF-α) and on blocking of interaction between TNF-α and membrane receptor

    TCF7L2 gene polymorphism in populations of f ive Siberian ethnic groups

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    Investigation of the frequencies of functionally signif icant gene variants in the context of medical biology and gene geography is a relevant issue for studying the genetic structure of human populations. The transition from a traditional to an urbanized lifestyle leads to a higher incidence of civilizational diseases associated with metabolic disorders, including type 2 diabetes mellitus. The goal of the present paper is to analyze the frequencies of functionally signif icant gene alleles in the metabolic prof iles of indigenous Siberian peoples to identify the gene pool resilience, evaluate the susceptibility of various ethnic groups to metabolic disorders under changing environmental conditions, and predict the epidemiological situation that may occur in the near future. The study was performed in the monoethnic samples of eastern and western Buryats, Teleuts, Dolgans, and two territorial groups of Yakuts. A real-time PCR was used to determine the frequencies of single nucleotide polymorphisms (SNPs) G103894T, rs12255372, and C53341T, rs7903146 in the TCF7L2 gene. The results obtained were compared to the frequencies identif ied for Russians from Eastern Siberia and the values available in the literature. The frequencies of the polymorphic variants studied in the samples from the indigenous Siberian peoples place them in between Caucasian and East Asian populations, following the geographic gradient of polymorphism distribution. A signif icantly lower occurrence of type 2 diabetes risk alleles TCF7L2 (103894T) and TCF7L2 (53341T) in the samples of indigenous Siberian peoples compared to Russians was observed, which agrees with their lower susceptibility to metabolic disorders compared to the newcomer Caucasian population. Taking into account urbanization, a reduced growth in type 2 diabetes incidence may be predicted in indigenous Siberian peoples, i. e. Buryats, Yakuts, Dolgans, and Teleuts, compared to the newcomer Caucasian population. A further study of population structure with respect to different metabolic prof ile genes is required to better understand the molecular genetic foundations of the adaptive potential of indigenous Siberian peoples

    Polymorphism of lipid exchange genes in some populations of South and East Siberia

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    Lipid metabolism disorders underlie the pathogenesis of a number of diseases. Indigenous peoples of Siberia have a specific genetically determined type of metabolism supporting such lipid blood parameters that favor increased consumption (in comparison with Caucasians) of animal products. At the same time, indigenous Siberian ethnic groups are less susceptible to metabolic diseases. The objective of the presented study was to investigate the allele frequencies of lipid metabolism genes in indigenous populations of Siberia to identify the ethnic features of allele frequency distribution for polymorphic variants in genes CETP (G1264A, rs5882), LPL (C1791G, rs328) and FTO (C83401A, rs8050136) in the samples taken from Buryats, Teleuts and Russians of Eastern Siberia, and to compare them with data on world populations. Samples of the Eastern (N = 132) and Western (N = 278) Buryats, Teleuts (N = 120), Russians (N = 122) and persons of mixed Buryat-Russian origin (N = 56) were genotyped by real-time PCR using competitive TaqMan-probes. The obtained results have for the first time demonstrated that the CETP and FTO allele frequencies in the Buryat samples are intermediate between European and East Asian populations. Significantly lower incidence of the obesity-assossiated 83401A allele of the FTO gene has been shown in Buryats, compared with Russians, which is consistent with lower susceptibility of the indigenous ethnic groups to metabolic disorders. There have been no population differences in the distribution of LPL gene polymorphic variants associated with dyslipidemia, which means they probably do not contribute to the ethnic characteristics of the lipid profile. The intermediate frequencies of the CETP 1264G and FTO 83401A alleles found in the metis group demonstrate that the metabolic disorders associated with these variants can be rather expected in the descendants of mixed marriages than among Buryats. It has also been demonstrated that Teleuts differ by FTO 83401A allele frequency from some of the European groups and have the lowest detected frequency of the allele CETP 1264G associated with the favorable lipid blood parameters

    Genetic polymorphism of CYP1A1 and CYP2D6 in populations of Buryats, Teleuts and Russians of Eastern Siberia

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    The study of the gene polymorphism of the system of biotransformation of xenobiotics is an important area of modern medical and genetic research. The aim of this work is to study the frequency of the alleles of the CYP1A1 (A2455G (*2C), rs1048943), CYP2D6 (A2549del (*3), rs35742686); G1846A (*4), rs3892097) genes of Teleuts (n = 115), Eastern Buryats (n = 132), Western Buryats (n = 280), their Métis (n = 56), and Russians of East Siberia (n = 122). Genotyping was performed using real-time PCR with competitive TaqMan allele-specific probes. The frequency of the CYP1A1*2C (2455G) allele was 28.8 % in the Eastern Buryat, 34.6 % in the Western Buryat, 16.7 % in the Teleut, and 31.3 % in the Métis cohort. The frequency of CYP1A1*2C (2455G) in the Russians of Eastern Siberia (4.1 %) corresponds to the frequency range found in European populations. A high-frequency occurrence of CYP1A1*2C (2455G) among Buryats and Teleuts may be indicative of a higher population-wide risk of diseases influenced by technogenic pollutants – substrates of CYP1A1. The CYP2D6*3 (2549del) allele was not detected in cohorts of indigenous populations, among Russians it was 0.4 %, and it was 2.7 % among Métis. The frequency of CYP2D6*4 (1846A) in Eastern and Western Buryats was 5.3 % and 4.3 %, respectively, for Teleuts it was 7.4 %. It was significantly higher in the Russian population (12 %), and among Métis (9.8 %). The obtained data makes it possible to predict a reduced risk of side effects of drugs and cancer associated with CYP2D6*3 (2549del) and CYP2D6*4 (1846A) in the Buryat and Teleut populations. However, metisation introduces new polymorphic variants into indigenous populations, shifts gene frequencies and changes the degree of risks

    Neutrophilic granulocytes in the patients with burn injury

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    Severe burn injury (BI) is accompanied by disturbed microcirculation, water-electrolyte and acidbase imbalance within 2-3 days after the accident, and the development of toxemia within 4-12 days. The severity of toxemia depends on the area and depth of the lesion, resorption of tissue decay products, and development of a systemic inflammatory response syndrome. In the patients suffering with deep BI sepsis, it develops in 15% of cases. Pathogenesis of critical conditions is related to the functional activity of myeloid cells, including neutrophilic granulocytes (NG). Тhe determination of NG’s dysfunctions in patients with BI is important, both for prediction of septic complications and administration of rational therapy. The aim of our work was to study the functions of neutrophils in patients with severe BI and to determine early predictors of burn-associated sepsis. The study involved 53 patients with severe BI at the mean age of 43 years (32 to 52); the area of damage was 43% (17 to 63) of the body surface, with deep-burn area of 17 (13 to 27) %. The severity of BI was assessed using the Frank index, at the average value of 74 conventional units (62 to 89). Тwo groups of patients were identified: 24 persons without sepsis, and 29 people with sepsis and severe sepsis. The studies were carried out upon admission, on the 1st, 3rd, 5th, 10th , and 20th day of the burn disease. We determined the numbers of NGs expressing CD18+, CD14+, defensin+; serum contents of soluble defensins (sDеf), IL-6, IL-8 levels (ELISA); procalcitonin, as well as luminol-mediated spontaneous аnd induced NG chemiluminescence. Тhe results of this study showed a relationship between the amounts of NGs containing antimicrobial peptides, contents of NGs expressing CD18+ adhesion molecules, activation of oxidative metabolism, IL-6 overproduction, and development of sepsis in patients with burn injury, as well as with severity of burn trauma

    Signal recognition and background suppression by matched filters and neural networks for Tunka-Rex

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    The Tunka Radio Extension (Tunka-Rex) is a digital antenna array, which measures the radio emission of the cosmic-ray air-showers in the frequency band of 30-80 MHz. Tunka-Rex is co-located with TAIGA experiment in Siberia and consists of 63 antennas, 57 of them are in a densely instrumented area of about 1 km\textsuperscript{2}. In the present work we discuss the improvements of the signal reconstruction applied for the Tunka-Rex. At the first stage we implemented matched filtering using averaged signals as template. The simulation study has shown that matched filtering allows one to decrease the threshold of signal detection and increase its purity. However, the maximum performance of matched filtering is achievable only in case of white noise, while in reality the noise is not fully random due to different reasons. To recognize hidden features of the noise and treat them, we decided to use convolutional neural network with autoencoder architecture. Taking the recorded trace as an input, the autoencoder returns denoised trace, i.e. removes all signal-unrelated amplitudes. We present the comparison between standard method of signal reconstruction, matched filtering and autoencoder, and discuss the prospects of application of neural networks for lowering the threshold of digital antenna arrays for cosmic-ray detection.Comment: ARENA2018 proceeding

    Current Status and New Challenges of The Tunka Radio Extension

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    The Tunka Radio Extension (Tunka-Rex) is an antenna array spread over an area of about 1~km2^2. The array is placed at the Tunka Advanced Instrument for cosmic rays and Gamma Astronomy (TAIGA) and detects the radio emission of air showers in the band of 30 to 80~MHz. During the last years it was shown that a sparse array such as Tunka-Rex is capable of reconstructing the parameters of the primary particle as accurate as the modern instruments. Based on these results we continue developing our data analysis. Our next goal is the reconstruction of cosmic-ray energy spectrum observed only by a radio instrument. Taking a step towards it, we develop a model of aperture of our instrument and test it against hybrid TAIGA observations and Monte-Carlo simulations. In the present work we give an overview of the current status and results for the last five years of operation of Tunka-Rex and discuss prospects of the cosmic-ray energy estimation with sparse radio arrays.Comment: Proceedings of E+CRS 201

    Pregnancy outcomes in women after arterial switch operation for transposition of the great arteries: results from ROPAC (Registry of Pregnancy and Cardiac Disease) of the European Сociety of cardiology EURObservational Research Programme

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    The ROPAC (Registry of Pregnancy and Cardiac disease) is an international prospective registry of pregnant women with cardiac disease, part of the European Society of Cardiology EURObservational Research Programme. Pregnancy outcomes in all women after an arterial switch procedure for transposition of the great arteries are described. The primary end point was a major adverse cardiovascular event, defined as combined end point of maternal death, supraventricular or ventricular arrhythmias requiring treatment, heart failure, aortic dissection, endocarditis, ischemic coronary events, and thromboembolic events. Altogether, 41 pregnant women (mean age, 26.7±3.9 years) were included, and there was no maternal mortality. A major adverse cardiovascular event occurred in 2 women (4.9%): heart failure in one (2.4%) and ventricular tachycardia in another (2.4%). One woman experienced fetal loss, whereas no neonatal mortality was observe
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