Influence of correlated impurities on conductivity of graphene sheets: Time-dependent real-space Kubo approach

Exact numerical calculations of the conductivity of graphene sheets with random and correlated distributions of disorders have been performed using the time-dependent real-space Kubo formalism. The disorder was modeled by the long-range Gaussian potential describing screened charged impurities and by the short-range potential describing neutral adatoms both in the weak and strong scattering regime. Our central result is that correlation in the spatial distribution for the strong short-range scatterers and for the long-range Gaussian potential do not lead to any enhancement of the conductivity in comparison to the uncorrelated case. Our results strongly indicate that the temperature enhancement of the conductivity reported in the recent study (Yan and Fuhrer, Phys. Rev. Lett. 107, 206601 (2011)) and attributed to the effect of dopant correlations was most likely caused by other factors not related to the correlations in the scattering potential.Comment: 14 pages, 10 figure

Development of a New Method of Storage and Maximum Separation of Chlorophils From Chlorophylcontaining Vegetables at Reception of Healthfull Nanoproducts

The aim of the work is the development of a new way of deep processing of chlorophyll-containing vegetables that gives a possibility not only to preserve chlorophylls a and b and other biologically active substances (BAS) of raw materials, but also to transform hidden bound (inactive) forms of chlorophyll in the free easy-digestible form at getting steam-thermally processed semi-products and healthy food products in the nanoform.For achieving the aim, the complex effect of steam-thermal processing and mechanolysis at fine-dyspersed comminution using the new equipment was applied as an innovation for thermal processing and comminution.There was developed the new method of getting healthy products of chlorophyll-containing vegetables (broccoli, spinach, Brussels cabbage, green leguminous haricot bean), steam-thermally processed (by hot steam) in the steam-convectional stove and fine-dyspersed with high contents of chlorophylls and other BAS and prebiotics. The method is based on the complex effect of processes of thermodestruction, mechanodestruction and non-enzymatic catalysis on raw materials at fine-dyspersed comminution. It was demonstrated, that at steam thermal processing of chlorophyll-containing vegetables (CCV) in the steam-convectomat during 5 minutes, there takes place not only preservation of chlorophylls a and b, but more full separation (in 1,33…1,4 times) from the hidden (bound) form, comparing with fresh vegetables. There was elucidated the mechanism of this process. The more full extraction of hidden forms of β-carotene (2 times more than in fresh CCV) takes place in parallel.The essentially more effect of transforming hidden forms was revealed at fine-dyspersed comminution of steam-thermally processed CCV. It was demonstrated, that thermally processed nanoproducts of CCV contain 2…2,1 more chlorophylls a and b, 2,0…3,3 times more carotenoids in the bound form than fresh vegetables.The quality of obtained new types of fine-dyspersated steam-thermally processed green products as puree and soups-purees of CCV exceeds one of known analogues by contents of chlorophylls a and b, β-carotene and other BAS, which are in nanosize easy-digestible form.Using new types of fine-dyspersated purees of CCV, there was developed the new green line of healthy nanoproducts: soups-purees, nanodrinks, nanosorbets, sauces-dressings, sauces-deeps, ice-cream, snacks and so on. It was demonstrated, that new products exceed existing analogues by BAS content (chlorophylls, β-carotene, L-ascorbic acid, phenol compounds)

Predictors of survival in patients with ischemic heart disease depending on therapy

The aim of the study is to assess the prognostic value of the structural and functional echocardiographic indicators in IHD patients, depending on acute coronary syndrome management (revascularization vs medical therapy), during 60 months. Materials and methods: The total of 101 IHD patients were examined on the clinical bases of the Internal Medicine Department 2. Prior to the study. The 84 males and 17 females aged 58.6±4.2were split into the experimental group after myocardial revascularization (EG, n = 71) and control group with standard medical therapy (CG, n = 30). In addition to the protocol-prescribed clinical lab tests, during five years, the dynamics of the echocardiographic cardiac parameters has been assessed. The digital data was processed by the Kaplan–Meier estimator; the 60-month cumulative survival rate (%) was estimated and significance of the difference was assessed by Cox's F-test (p<0.05). Results and discussion. It appeared that the 5-year prognosis in IHD patients was unaffected by the dimensions of IVST, LVIDD and LVMMI. In 60 months after the surgery, a significantly better prognosis was observed for certain unfavourable initial conditions: enlarged RV ≥ 2.5 cm (37.5% vs 30.7%, р = 0.008), aortic diameter ≥ 3.0 cm (57.2% vs 34.3%, р = 0.02), enlarged LA ˃ 4.0 cm (43.8% vs 24.7%, р = 0.046). In addition, revascularization was associated with better survival rates for normal LVMM (<250 g; 75.8% vs 49.1%, р=0.05), without the thickening of the LV walls (66.9% vs 30.5%, р=0.047) and without LV systolic dysfunction (87.7% vs 59.9%, р=0.046). An important place among the echocardiographic criteria of unfavourable prognosis belongs to LV systolic dysfunction (EF ≤ 45%). Therefore, the experimental group patients were distributed according to the EF value, following the Ukrainian Association of Cardiology and EU guidelines, i.e. we singled out the so-called grey zone (EF=45-54%), where the patients featuring LV systolic dysfunction and preserved EF belonged. The analysis of the results showed the cumulative event-free survival to be 87.4% for EF ˃ 55%, 14.6% for EF = 45-54% and 42.9% for EF < 45% (р = 0.01). The patients after the myocardial revascularization with EF = 45-54% had a worse prognosis of event-free survival than those with LV systolic dysfunction. In the group of patients who had undergone only the medical therapy, the survival prognosis was significantly worse, which corresponded to a reduced EF (38.3% for EF ˃ 55%, 15.0% for EF = 45-54% and 0% for EF < 45%, p EG-CG = 0.01). A similar EF-based distribution was used in the study of patients with decompensated heart failure (REDINSCOR II, 2017), in which the authors revealed that the grey zone patients featured a higher risk of cardiovascular complications than patients with normal EF values did. Conclusions. Revascularization contributed to a considerably better 60-month survival prognosis for cases featuring the enlarged right ventricle (≥2.5 cm), enlarged left atrium (˃4.0 cm) and extended aortic root (≥3.0 cm), but with the normal left ventricular myocardial mass (< 250 g) and without ventricular hypertrophy or systolic dysfunction

Symplectic geometries on supermanifolds

Extension of symplectic geometry on manifolds to the supersymmetric case is considered. In the even case it leads to the even symplectic geometry (or, equivalently, to the geometry on supermanifolds endowed with a non-degenerate Poisson bracket) or to the geometry on an even Fedosov supermanifolds. It is proven that in the odd case there are two different scalar symplectic structures (namely, an odd closed differential 2-form and the antibracket) which can be used for construction of symplectic geometries on supermanifolds.Comment: LaTex, 1o pages, LaTex, changed conten

BRST structure of non-linear superalgebras

In this paper we analyse the structure of the BRST charge of nonlinear superalgebras. We consider quadratic non-linear superalgebras where a commutator (in terms of (super) Poisson brackets) of the generators is a quadratic polynomial of the generators. We find the explicit form of the BRST charge up to cubic order in Faddeev-Popov ghost fields for arbitrary quadratic nonlinear superalgebras. We point out the existence of constraints on structure constants of the superalgebra when the nilpotent BRST charge is quadratic in Faddeev-Popov ghost fields. The general results are illustrated by simple examples of superalgebras.Comment: 15 pages, Latex, references added, misprints corrected, comments adde

The Indicative Potential of the Forest-Tundra Landscape Component

In order to expand the possibilities of soil-cover remote monitoring and improve prognostic models of active-layer depth dynamics in connection with global climatic changes, the verification of correspondence between plant and soil components of subarctic landscapes is necessary. This is most relevant for the forest-tundra zone,where the variety and mosaicity of soils and vegetation is great due to its ecotonic position. The purpose of this work was to study the relationship of vegetation with the characteristics of cryogenic soils and the dynamics of the active layer in forest-tundra landscapes. Data were obtained during monitoring studies at key sites in diverse landscapes of forest-tundra in the vicinity of Labytnangi. It was revealed that the thickness of the organogenic horizons, as well as the value of the moss phytomass, determine the active-layer thickness. A close connection with relief and soils allows the use of vegetation as an indicator of the soil texture and the depth of active-layer occurrence and features. Keywords: plant communities, cryogenic soils, active layer, landscape, forest-tundra, Western Siberi

MOLECULAR AND GENETIC CHARACTERISTICS OF SURFACE AND NONSTRUCTURE PROTEINS OF PANDEMIC INFLUENZA VIRUSES A(H1N1)PDM09 IN 2015-2016 EPIDEMIC SEASON

The aim of the present study was identifying of molecular and genetic changes in hemaglutinin (HA), neuraminidase (NA) and non-structure protein (NS1) genes of pandemic influenza A(H1N1)pdm09 strains, that circulated in Ukraine during 2015-2016 epidemic season. Samples (nasopharyngeal swabs from patients) were analyzed using real-time polymerase chain reaction (RTPCR). Phylogenetic trees were constructed using MEGA 7 software. 3D structures were constructed in Chimera 1.11.2rc software.Viruses were collected in 2015-2016 season fell into genetic group 6B and in two emerging subgroups, 6B.1 and 6B.2 by gene of HA and NA. Subgroups 6B.1 and 6B.2 are defined by the following amino acid substitutions. In the NS1 protein were identified new amino acid substitutions D2E, N48S, and E125D in 2015-2016 epidemic season. Specific changes were observed in HA protein antigenic sites, but viruses saved similarity to vaccine strain. NS1 protein acquired substitution associated with increased virulence of the influenza virus

Higher order relations in Fedosov supermanifolds

Higher order relations existing in normal coordinates between affine extensions of the curvature tensor and basic objects for any Fedosov supermanifolds are derived. Representation of these relations in general coordinates is discussed.Comment: 11 LaTex pages, no figure

A REACTION OF HEART RATE VARIABILITY SPECTRAL PARAMETERS IN THE PHARMACOLOGICAL TEST WITH MEBICAR IN HEALTHY VOLUNTEERS

On 13 conditionally healthy volunteers aged from 18 to 46 years (mean age – 22±7,6 years) the variability of the total power (TP, ms2) of the spectrum, very low frequency (VLF, ms2), low frequency (LF, ms2) and high frequency (HF, ms2) domains of heart rate variability (HRV) in 5 minute intervals of ECG in I standard lead before and 30 minutes after oral admission of 500 mg of mebicar were evaluated. The data were processed by methods of nonparametric statistics. No significant changes in TP, VLF, LF, HF HRV after 30 minutes (maximum time declared by pharmacodynamics action) after administration of 500 mg of mebicar were noted by us. Accordingly, the effectiveness of mebicar as an adaptogen without evidence-based research cannot be postulated