Diffraction efficiency of photothermoplastic layers for the recording of discrete holograms

An experimental and theoretical study of the dependence of eta of a digital phase Fourier hologram of a point object on the amount of deformation delta and the discrete-structure parameters representing the hologram is detailed. An expression is given for eta. Experiments were performed on photothermoplastic layers based on polyvinyl carbazole and trinitrofluorenone charge transfer complexes. The maximum eta, 2%, is found at delta = 0.56 micron

Selectivity of the Lindlar catalyst in alkyne semi-hydrogenation: a direct liquid-phase adsorption study

We study the alkyne semi-hydrogenation selectivity over Pd and Lindlar catalyst with liquid phase adsorption. The results indicate that there are strongly-adsorbing alkyne and alkene sites; alkenes react non-selectively over the alkene adsorption sites. DFT studies indicate that the non-selective sites are low-coordination Pd atoms in the nanoparticles

Effects of age and gender on dietary habits of people engaged in sports at the age of 40 and older

Objective: to analyze how eating habits depend on age and gender among people aged 40 and over engaged in sports (athletics, participation in 10 km or more road running races).Materials and methods: the information about eating habits was obtained through questionnaires of athletes aged 40 and over, participating in 10 km or more road running races. 1649 questionnaires were analyzed. The analysis was carried out in three age groups: 40–49 years old, 50–59 years old, and 60 years old and over.Results: more than half of men and a third of women do not follow any principles in organizing their diet. The most common habit, regardless of gender, is eating three or more times a day. The largest amount of food is consumed in the middle of the day and in the afternoon. Most of the respondents try to eat at the same time of the day, when there is such an opportunity. Snacking between main meals is a widespread habit, especially among women. Despite the fact that the majority of men and 30 % of women often consume flour products and products containing sugar, they are not overweight.Conclusion: most of the athletes aged 40 and over do not aim to follow a diet or improve nutrition

Analysis of the Genome Wide Sequence of Yersinia pestis strains Based on the Consecutive 680-SNP Algorithm

Designed is an optimized scheme for SNP analysis of the genome wide sequences of plague agent strains, based on the consecutive algorithm of clusterization of individual intraspesific Y. pestis groups. The scheme comprises 680 singular polymorphic nucleotides (SNPs), the usage of which provides not only for the clustering of closely related strains, but for the determination of phylogenetic bonds between groups of strains and order of their divergence from the common tree-trunk of the plague agent evolution. Based on the consecutive 680-SNP algorithm, carried out is the analysis of genome wide sequences of C-627 Y. pestis strain isolated in Central-Caucasian high-mountain focus (Russia), strain 1454 isolated in Altay mountain focus (Russia), strain 231 (708) – Aksay high mountain focus (Kirgizia), and vaccine EV NIIEG (Research Institute of Epidemiology and Hygiene) strain, applied for immunization in the Russian Federation and in a number of other countries. Identified are the genome variants of the strains: 1. ORI3 (EV NIIEG), 2. MED0 (C-627), 0.ANT3 (231(708)), 0.ANT4 (1454), and their place in the scheme of Y. pestis global variation. Evidenced is the absence of the chromosomal region responsible for pigmentation in the genome wide sequence of the vaccine strain EV NIIEG, which testifies to its safe use for specific plague prophylaxis

Infection of an Individual with Plague in the Gorno-Altaisk High-Mountain Natural Focus in 2014. Communication 2. Peculiarities of Laboratory Diagnostics and Molecular-Genetic Characterization of the Isolated Strains

Laboratory diagnostics of plague was carried out in compliance with valid operational guidelines and regulations. But its peculiarity consisted in the performance of diagnostic investigations secondary to antimicrobial therapy with application of preparations characterized by the expressed activity towards gram-negative microorganisms, including the agent of plague (ceftriaxone, ciprolet, and amikacin). The studies revealed that under antibiotic treatment during the early phase of infection the most effective method for the laboratory plague diagnostics was PCR. Based on the results of the assay it was possible to establish not only provisional, but also the final diagnosis in a patient. Obtained was genetic characteristics of the strains isolated from the patient and the marmot, withdrawn at the patient’s place, using techniques of molecular-genetic analysis, in particular PCR, multilocus VNTR, and multilocus and genome-wide sequencing. Thereupon the strains were attributed to antique biovar of the main subspecies of plague agent. In addition, close relation to Y. pestis of the main subspecies isolated in the same focus in 2012 and to the strains from Mongolian Altai and Tuvinian mountain focus was determined based on phylogenetic analysis of the isolates

The Role of Vacuum-Assisted Wound Closure Therapy after the Surgical Treatment of the Pilonodal Sinus

Aim. This study is aimed at improving the treatment of patients with the pilonidal sinus (PS) by open wound healing methods.Materials and methods. The study included 54 patients with PS. The main group consisted of 29 patients treated by an open (exposure) management technique and a subsequent vacuum-assisted wound closure therapy. The control group consisted of 25 patients treated with conventional ointment bandages.Results. On the 8th day of vacuum-assisted therapy (VAC-therapy), the areas of granulation tissue were identified in 23 (79.3 %) and 10 (40.0 %) (p = 0.041) cases in the main group and the control group, respectively. Following one month of treatment, complete wound healing was observed in 24 (82.8 %) patients in the main group, with no patients in the control group showing signs of complete healing (p < 0.0001). Cytologically, starting from the 8th day of VAC-therapy, a decrease in inflammation was observed in 24 (82.8 %) patients in the main group, with the wound regenerative processes being recorded on the 16th day in 17 (58.6 %) patients (p < 0.05). The average rate of wound healing in the main group was significantly higher and equal to 2.15 ± 0.15 cm2/day, compared to the value of 0.76 ±0.18 cm2/day in the control group.Conclusion. Vacuum-assisted wound closure therapy is an effective way to stimulate reparative processes during the open management of wounds after the surgical treatment of PS. Aim. This study is aimed at improving the treatment of patients with the pilonidal sinus (PS) by open wound healing methods.Materials and methods. The study included 54 patients with PS. The main group consisted of 29 patients treated by an open (exposure) management technique and a subsequent vacuum-assisted wound closure therapy. The control group consisted of 25 patients treated with conventional ointment bandages.Results. On the 8th day of vacuum-assisted therapy (VAC-therapy), the areas of granulation tissue were identified in 23 (79.3 %) and 10 (40.0 %) (p = 0.041) cases in the main group and the control group, respectively. Following one month of treatment, complete wound healing was observed in 24 (82.8 %) patients in the main group, with no patients in the control group showing signs of complete healing (p < 0.0001). Cytologically, starting from the 8th day of VAC-therapy, a decrease in inflammation was observed in 24 (82.8 %) patients in the main group, with the wound regenerative processes being recorded on the 16th day in 17 (58.6 %) patients (p < 0.05). The average rate of wound healing in the main group was significantly higher and equal to 2.15 ± 0.15 cm2/day, compared to the value of 0.76 ±0.18 cm2/day in the control group.Conclusion. Vacuum-assisted wound closure therapy is an effective way to stimulate reparative processes during the open management of wounds after the surgical treatment of PS

The Role of Vacuum-Assisted Wound Closure Therapy after the Surgical Treatment of the Pilonodal Sinus

Aim. This study is aimed at improving the treatment of patients with the pilonidal sinus (PS) by open wound healing methods.Materials and methods. The study included 54 patients with PS. The main group consisted of 29 patients treated by an open (exposure) management technique and a subsequent vacuum-assisted wound closure therapy. The control group consisted of 25 patients treated with conventional ointment bandages.Results. On the 8th day of vacuum-assisted therapy (VAC-therapy), the areas of granulation tissue were identified in 23 (79.3 %) and 10 (40.0 %) (p = 0.041) cases in the main group and the control group, respectively. Following one month of treatment, complete wound healing was observed in 24 (82.8 %) patients in the main group, with no patients in the control group showing signs of complete healing (p < 0.0001). Cytologically, starting from the 8th day of VAC-therapy, a decrease in inflammation was observed in 24 (82.8 %) patients in the main group, with the wound regenerative processes being recorded on the 16th day in 17 (58.6 %) patients (p < 0.05). The average rate of wound healing in the main group was significantly higher and equal to 2.15 ± 0.15 cm2/day, compared to the value of 0.76 ±0.18 cm2/day in the control group.Conclusion. Vacuum-assisted wound closure therapy is an effective way to stimulate reparative processes during the open management of wounds after the surgical treatment of PS. Aim. This study is aimed at improving the treatment of patients with the pilonidal sinus (PS) by open wound healing methods.Materials and methods. The study included 54 patients with PS. The main group consisted of 29 patients treated by an open (exposure) management technique and a subsequent vacuum-assisted wound closure therapy. The control group consisted of 25 patients treated with conventional ointment bandages.Results. On the 8th day of vacuum-assisted therapy (VAC-therapy), the areas of granulation tissue were identified in 23 (79.3 %) and 10 (40.0 %) (p = 0.041) cases in the main group and the control group, respectively. Following one month of treatment, complete wound healing was observed in 24 (82.8 %) patients in the main group, with no patients in the control group showing signs of complete healing (p < 0.0001). Cytologically, starting from the 8th day of VAC-therapy, a decrease in inflammation was observed in 24 (82.8 %) patients in the main group, with the wound regenerative processes being recorded on the 16th day in 17 (58.6 %) patients (p < 0.05). The average rate of wound healing in the main group was significantly higher and equal to 2.15 ± 0.15 cm2/day, compared to the value of 0.76 ±0.18 cm2/day in the control group.Conclusion. Vacuum-assisted wound closure therapy is an effective way to stimulate reparative processes during the open management of wounds after the surgical treatment of PS

Engines for domestic drones: past, present and future

The article provides an analytical overview of previously created engines, those in operational service and engines being developed for unmanned military-purpose aerial vehicles. The current state of the engine fleet, modern problems of development and production of domestic engines are described. It is shown that modern unmanned military-purpose aerial vehicles use a variety of types of power plants, for which their main technical characteristics, design and layout schemes are given. Some projects carried out under the program of import substitution are disclosed. The results of work conducted at the Department of Aircraft Engines of the Air Force Academy named after Professor N.E. Zhukovsky and Y.A. Gagarin are presented. The article outlines critical technologies for creating full-size gas turbine engines for the most complex and expensive class of heavy unmanned combat air vehicles with a take-off weight of more than 10 tons, designed to solve a wide range of tasks, including strategic ones. On the basis of the analysis of the existing unmanned systems conclusions were drawn as to the choice of the type of engine depending on their take-off weight. The basic directions of further development of power plants for one of the most dynamically developing branches of aviation unmanned air vehicles - were forecast