Electronic-microscopic estimation of changes in erythrocytes ultrastructure under influence of low-frequency ultrasound

The paper presents the estimation of changes of erythrocytes ultra-structure under influence of low-frequency ultrasound using various types of waveguides. It was demonstrated that application of ultrasound contributes to change of erythrocyte form and size, which depend on intensity, duration and type of the waveguide

CORRELATION OF THE SKULL PARAMETERS WITH THE WIDTH OF THE DENTAL ARCHES

The study of regularities and variant anatomy in the structure of organs and parts of the human body is one of the fundamental problems of morphology having an applied orientation. The main method of studying a person's aesthetics is a morphometric examination of the head. It includes the study of its size, size and shape of the face and its individual parts, as well as the relationship between the size and shape of the skull and dental arches. The main linear parameters of the skull and their interrelations with the parameters of the width of the dental arches of the upper jaw are studied on the skull of male of mature age with physiological occlusion of teeth. The study was carried out taking into account the type of skull. It was revealed that the index of the width of the dental arch from the vestibular side is lesser then the index of the upper face and the intergnatic part in the frontal part, and in the distal part - to the contrary. Indicators of the width of the dental arch from the palatal side were less in their values to the parameters of the skull at all levels of measurement in all craniotypes. Obtained data on the width of the dental arch of the upper jaw, linear parameters of the skull and their interrelations expand and deepen the information available in the literature on the dimensional characteristics of the craniofacial complex

The Outburst of the Blazar AO 0235+164 in 2006 December: Shock-in-Jet Interpretation

We present the results of polarimetric ($R$ band) and multicolor photometric ($BVRIJHK$) observations of the blazar AO 0235+16 during an outburst in 2006 December. The data reveal a short timescale of variability (several hours), which increases from optical to near-IR wavelengths; even shorter variations are detected in polarization. The flux density correlates with the degree of polarization, and at maximum degree of polarization the electric vector tends to align with the parsec-scale jet direction. We find that a variable component with a steady power-law spectral energy distribution and very high optical polarization (30-50%) is responsible for the variability. We interpret these properties of the blazar withina model of a transverse shock propagating down the jet. In this case a small change in the viewing angle of the jet, by $\lesssim 1^o$, and a decrease in the shocked plasma compression by a factor of $\sim$1.5 are sufficient to account for the variability.Comment: 22 pages, 8 figures, accepted for Ap

Extracellular vesicles derived from Acholeplasma laidlawii PG8

Extracellular vesicle production is believed to be a ubiquitous process in bacteria, but the data on such a process in Mollicutes are absent. We report the isolation of ultramicroforms - extracellular vesicles from supernatants of Acholeplasma laidlawii PG8 (ubiquitous mycoplasma; the main contaminant of cell culture). Considering sizes, morphology, and ultrastructural organization, the ultramicroforms of A. laidlawii PG8 are similar to membrane vesicles of Gram-positive and Gram-negative bacteria. We demonstrate that A. laidlawii PG8 vesicles contain genetic material and proteins, and are mutagenic to lymphocytes of human peripheral blood. We show that Mycoplasma gallisepticum S6, the other mycoplasma, also produce similar structures, which suggests that shedding of the vesicles might be the common phenomenon in Mollicutes. We found that the action of stress conditions results in the intensive formation of ultramicroforms in mycoplasmas. The role of vesicular formation in mycoplasmas remains to be studied. ©2011 with author. Published by TheScientificWorld

Frequency of occurrence of blockage of the right leg of the gis bundle in people of working age

The purpose of the study -to determine the frequency of occurrence of blockade of the right leg of the Gis beam in people of working age.Цель исследования - определить частоту встречаемости блокады ПНПГ у лиц трудоспособного возраста

Another look at the BL Lacertae flux and spectral variability

The GLAST-AGILE Support Program (GASP) of the Whole Earth Blazar Telescope (WEBT) monitored BL Lacertae in 2008-2009 at radio, near-IR, and optical frequencies. During this period, high-energy observations were performed by XMM-Newton, Swift, and Fermi. We analyse these data with particular attention to the calibration of Swift UV data, and apply a helical jet model to interpret the source broad-band variability. The GASP-WEBT observations show an optical flare in 2008 February-March, and oscillations of several tenths of mag on a few-day time scale afterwards. The radio flux is only mildly variable. The UV data from both XMM-Newton and Swift seem to confirm a UV excess that is likely caused by thermal emission from the accretion disc. The X-ray data from XMM-Newton indicate a strongly concave spectrum, as well as moderate flux variability on an hour time scale. The Swift X-ray data reveal fast (interday) flux changes, not correlated with those observed at lower energies. We compare the spectral energy distribution (SED) corresponding to the 2008 low-brightness state, which was characterised by a synchrotron dominance, to the 1997 outburst state, where the inverse-Compton emission was prevailing. A fit with an inhomogeneous helical jet model suggests that two synchrotron components are at work with their self inverse-Compton emission. Most likely, they represent the radiation from two distinct emitting regions in the jet. We show that the difference between the source SEDs in 2008 and 1997 can be explained in terms of pure geometrical variations. The outburst state occurred when the jet-emitting regions were better aligned with the line of sight, producing an increase of the Doppler beaming factor. Our analysis demonstrates that the jet geometry can play an extremely important role in the BL Lacertae flux and spectral variability.Comment: 12 pages, 10 figures, accepted for publication in A&

Синтез и необычно легкая внутримолекулярная циклизация в ряду аспартильных производных гистамина

A series of natural and novel aspartyl derivatives of histamine were obtained by the classical peptide chemistry methods in a solution. During the synthesis of Nacetylaspartylhistamine easy and spontaneously cyclization of the protected Ac-AspOBzl into succinimide derivative was observed even after one day storage.Осуществлен синтез семейства природных аспартильных производных гистамина и родственных соединений. Исследована побочная реакция необычно легкой циклизации бензиловых эфиров Asp-HA