A uniqueness result for the inverse problem of identifying boundaries from weighted Radon transform

We study the problem of the integral geometry, in which the functions are integrated over hyperplanes in the $n$-dimensional Euclidean space, $n=2m+1$. The integrand is the product of a function of $n$ variables called the density and weight function depending on $2n$ variables. Such an integration is called here the weighted Radon transform, which coincides with the classical one if the weight function is equal to one. It is proved the uniqueness for the problem of determination of the surface on which the integrand is discontinuous.Comment: 10 pages, 1 figur

Translation of Konovalova, S. I. and A. M. Krivkova. 1971. Materialy k biologicheskoi kharakteristike avirulentnykh shtammov toksoplazm, vydelennykh ot dikikh zhivotnykh [= Materials toward a biological characterization of avirulent strains of \u3ci\u3eToxoplasma\u3c/i\u3e isolated from wild animals]. \u3ci\u3eVoprosy Prirodnoi Ochagovosti Boleznei\u3c/i\u3e [= \u3ci\u3eContributions on the Natural Nidality of Diseases\u3c/i\u3e]. Alma-Ata, Kazakhstan, USSR 4: 54-64

Translation number 34, College of Veterinary Medicine, University of Illinois, Urbana, Illinois, United States, January 9, 1973 (6 pages) Translation of Konovalova, S. I. and A. M. Krivkova. 1971. Materialy k biologicheskoi kharakteristike avirulentnykh shtammov toksoplazm, vydelennykh ot dikikh zhivotnykh [= Materials toward a biological characterization of avirulent strains of Toxoplasma isolated from wild animals]. Voprosy Prirodnoi Ochagovosti Boleznei [= Contributions on the Natural Nidality of Diseases]. Alma-Ata, Kazakhstan, USSR 4: 54-64 Translated from Russian to English by Frederick K. Plous, Jr. Edited by Norman D. Levine (notated jm

New Late Viséan and Early Serpukhovian ammonoids in the Verkhnyaya Kardailovka section (Eastern Slope of the South Urals)

© 2017, Pleiades Publishing, Ltd. New Late Viséan and Early Serpukhovian ammonoids are described from the Verkhnyaya Kardailovka section (South Urals, Bashkortostan). The ammonoid assemblages allow the recognition of the Hypergoniatites−Ferganoceras Genozone and a correlation with the synchronous zonations of North Africa, Spain, and China. The new species Ferganoceras constrictum sp. nov., Dombarites clemens sp. nov., and Hypergoniatites kardailovkensis sp. nov. are described

2-Hydroxy­imino-N′-[1-(2-pyrid­yl)ethyl­idene]propanohydrazide

The title compound, C10H12N4O2, features an intra­molecular N—H⋯N hydrogen bond formed between the imine NH and oxime N atoms. The oxime group and the amide C=O bond are anti to each other. In the crystal, mol­ecules are connected by O—H⋯O hydrogen bonds into supra­molecular zigzag chains along the c axis

The study of the endothelial protective properties of the L-norvaline combination with mexidol in the simulation of L-NAME-induced NO deficiency

The endothelium is considered as a target for the prevention and treatment of pathological processes leading to cardiovascular diseases. A combination of L-norvaline at a dose of 10 mg/kg and mexidol at a dose of 60 mg/kg against the background of L-NAME-induced endothelial dysfunction has a pronounced endothelial protective effect. The investigated drugs showed pronounced endothelial protective activity and can be recommended for further pre-clinical studie

The relationship between fetuin-A level and the clinical features of patients with coronary artery disease associated with iron deficiency

The aim of the study: to assess the relationship between the level of fetuin-A and features of clinical hemogram, ferrokinetic parameters, vegetative and structural-functional changes of the myocardium in patients with coronary artery disease (CAD) associated with different stages of iron deficiency (ID). Materials and methods. The study involved 90 patients with CAD: stable angina pectoris II–III FC (35 men and 55 women, age – 69 (61; 72)). All patients were divided into 4 clinical groups depending on the parameters of iron metabolism and hemogram: I (n = 16) – patients with absolute ID, II (n = 15) – with latent ID, III (n = 14) – with functional ID; IV (n = 45) – patients CAD without iron metabolism disorders. The physiological concentration of fetuin-A was determined in 15 conditionally healthy people. The results of echocardioscopy, Holter ECG monitoring and their relationship with the level of fetuin-A were analyzed. Results. In patients with CAD associated with various stages of ID, there is a decrease in the concentration of fetuin-A in direct proportion to the degree of progression of sideropenia was established. It was established that there is a relationship between the level of fetuin-A and the concentration of ferritin and transferrin saturation for patients with absolute ID as well as the number of erythrocytes in patients with functional ID. It was established that there is a relationship between the level of fetuin-A and PWd (rs = -0.60, p < 0.05) for patients with absolute ID; for patients with latent ID – with the E/A ratio (rs = +0.66, p < 0.05). In patients with absolute ID and latent ID a number of correlations between fetuin-A level and heart rate variability indicators in active and passive periods was established. The presence of a low level of fetuin-A in patients with CAD and ID increased the risk of left ventricular hypertrophy by 1.5 times, left ventricular diastolic dysfunction by 1.6 times, autonomic dysfunction by 2.14 times in the active period and 1.95 times in the passive period. Conclusions. In patients with CAD, there is a progressive decrease in the fetuin-A level depending on the degree of ID, which contributes to the deepening of disorders of iron metabolism and clinical hemogram, negatively affects the structural and functional state of the myocardium and heart rate variability, increases the risk of developing myocardial hypertrophy, left ventricular diastolic dysfunction and vegetative imbalance

Donors of effective genes for scald resistance in barley

Background. One of the most harmful diseases of barley in all areas of its cultivation is scald. The causal agent Rhynchosporium commune Zaffarano, B.A. McDonald &amp; A. Linde (formerly – Rhynchosporium secalis (Oudem.) J.J. Davis) is characterized by a high level of variability, which leads to the emergence of new pathotypes and the loss of resistance of a number of cultivars. Most barley cultivars recommended for cultivation are highly affected by the pathogen. The aim of the study was to find new donors of effective barley resistance genes to R. commune.Materials and methods. Resistance to the fungus was tested in 99 accessions of barley landraces from 18 countries under laboratory and field conditions. The experiments employed isolates and clones of R. commune isolated from plants collected in Leningrad Province. Plant resistance was scored using point scales. Genetic control of fungal resistance was studied in the selected accessions using hybridological analysis.Results and conclusions. We identified 3 accessions of barley landraces, which retained high resistance to the fungus for six years of study in the field under inoculation with different populations of R. commune. Accessions k-31504 (Macedonia), k-31505 (Ethiopia) and k-31503 (India) are protected by R. commune resistance genes, which differ from each other, are not allelic to the previously identified effective Rrs9 gene, and manifest themselves throughout all stages of barley ontogenesis. Each of accessions k-31504 and k-31505 incorporates 2 recessive pathogen resistance genes; k-31503 carries 3 recessive resistance genes

catena-Poly[neodymium(III)-bis­[μ-N-(dimorpholinophosphor­yl)benzene­sulfonamidato]-sodium(I)-bis­[μ-N-(dimorpholinophosphor­yl)benzene­sulfonamidato]]

The cubic crystal structure of the title compound, [NaNd(C14H21N3O5PS)4]n, is composed of one-dimensional polymeric chains propagating in [100], built up from [Nd(C14H21N3O5PS)4]− anions and sodium cations functioning as linkers. In the complex anion, the Nd3+ ion has an eightfold coordination environment formed by the sulfonyl and phosphoryl O atoms of four bidentate chelating N-(dimorpholinophosphor­yl)benzene­sulfonamidate ligands: the resulting NdO8 polyhedron can be described as inter­mediate between dodeca­hedral and square anti­prismatic. The sodium ion adopts an NaO4 tetra­hedral geometry arising from four monodentate benzene­sulfonamidate ligands. The resulting crystal structure is unusual because it contains substantial voids (800 Å3 per unit cell), within which there is no evidence of included solvent