Improved the properties of laser-produced plasma ions using multichannel laser beams

At present, there are number of works devoted to the study of laser-produced plasma as a source of ions for ICF together with heavy ion accelerators and the systems on the base of powerful impulse of electrical charge, i.e. Z-pinches. Laser ion source (LIS) has been recently designed to load the Heidelberg electron beam ion trap with a pulsed beam of charged ions from solid elements. Due to many characteristics of laser-produced plasmas, LIS takes advantages over e.g. a common metal vapor vacuum arc method as a source of ions..

Improved the properties of laser-produced plasma ions using multichannel laser beams

At present, there are number of works devoted to the study of laser-produced plasma as a source of ions for ICF together with heavy ion accelerators and the systems on the base of powerful impulse of electrical charge, i.e. Z-pinches. Laser ion source (LIS) has been recently designed to load the Heidelberg electron beam ion trap with a pulsed beam of charged ions from solid elements. Due to many characteristics of laser-produced plasmas, LIS takes advantages over e.g. a common metal vapor vacuum arc method as a source of ions..

Asymmetric introgression reveals the genetic architecture of a plumage trait

Genome-wide variation in introgression rates across hybrid zones offers a powerful opportunity for studying population differentiation. One poorly understood pattern of introgression is the geographic displacement of a trait implicated in lineage divergence from genome-wide population boundaries. While difficult to interpret, this pattern can facilitate the dissection of trait genetic architecture because traits become uncoupled from their ancestral genomic background. We studied an example of trait displacement generated by the introgression of head plumage coloration from personata to alba subspecies of the white wagtail. A previous study of their hybrid zone in Siberia revealed that the geographic transition in this sexual signal that mediates assortative mating was offset from other traits and genetic markers. Here we show that head plumage is associated with two small genetic regions. Despite having a simple genetic architecture, head plumage inheritance is consistent with partial dominance and epistasis, which could contribute to its asymmetric introgression. Hybrid zones are windows into the evolutionary process. Semenov et al. find that the head plumage differences between white wagtail subspecies have a simple genetic basis involving two small genetic regions, in which partially dominant and epistatic interactions help to explain how this sexual signal has become decoupled from other plumage traits

Mild form of iron deficiency anemia and a latent iron deficiency as a border – line state in infants aged under 2 years

The mentioned forms of iron deficiency in infants aged 6 mos - 2 yrs were found to be wide – spread, almost blurred clinically, and of high spontaneous reversity. Therefore, failing to affect the children’s growth, physical development and the morbidity rate these disorders could be considered as a border–line stete

Аномалии и пороки развития висцеральных артерий при внепеченочной портальной гипертензии у детей

Purpose. To study the incidence of anomalies and malformations of visceral arteries and evaluate their role in the treatment of extrahepatic portal vein obstruction (EHPVO) in childrenMaterial and Methods. The study included 155 previously not operated children with EHPVO. A retrospective analysis of the results of three-phase multislice computed tomography with angiography (MSCTA) of visceral vessels was performed. Frequency of visceral arteries anomalies of the abdominal aorta, aortomesenteric angle, the structure of the hepatic, splenic and superior mesenteric arteries (SMA) were assessed. The size of visceral arteries depending on the prevalence of portal vein thrombosis was also assessed.Results. According to analysis 35 (22.6%) children with EHPVO had abnormalities of visceral arteries. Of them, 14 (11.7%) patients presented with signs of aortomesenteric compression of the left renal vein (LRV). Coeliacomesenteric trunk was detected in 4 (2.5%) children. In one (0.64%) case there was sign of saccular splenic artery (SA) aneurysm. According to data, there was a significant correlation of the diameter of SA and SMA with the age of children (r = 0.58; p = 0.001). According to the study, diameter of arteria hepatica propria in children with portal vein thrombosis (PVT) with extension into superior mesenteric vein (SMV) was significantly lower than in PVT and its branches (2.48 ± 0.23 mm vs 3.15 ± 0.08 mm, p = 0.01). The diameter of SA in children with PVT extended into splenic vein was significantly smaller (4.26 ± 0.19 mm) in comparison to children with PVT and its branches (4.9 ± 0.12 mm, p = 0.01), and children with widespread thrombosis of portal vein system (5.45 ± 0.41 mm, p = 0.05).Conclusion. Multiple aberrations of the anatomical structures of visceral arteries make any hepatobiliary surgery challenging to surgeons. The study data suggest that MSCTA is an informative method for evaluation of associated anomalies of visceral arteries in children with EHPH.Цель исследования: изучить частоту аномалий и пороков развития висцеральных артерий и оценить их роль в лечении внепеченочной блокады воротного кровообращения (ВБВК) у детей.Материал и методы. В исследование включены 155 ранее не оперированных детей в возрасте от 2 до 17 лет с ВБВК. Проведен ретроспективный анализ результатов 3-фазной мультиспиральной компьютерной томографии с ангиографией (МСКТА) висцеральных сосудов. Проанализирована частота аномалий строений висцеральных артерий брюшного отдела аорты, величина аортомезентериального угла, структура собственно печеночной, селезеночной и верхней брыжеечной (ВБА) артерий. Также проанализированы размеры висцеральных артерий в зависимости от степени флеботромбоза в системе воротной вены (ВВ).Результаты. Согласно анализу МСКТА, у 155 пациентов с внепеченочной портальной гипертензией (ВПГ) аномалии развития висцеральных артерий отмечены у 35 (22,6%) детей. При этом у 14 (11,7%) детей выявлены признаки аортомезентериальной компрессии левой почечной вены (ЛПВ). У 4 (2,5%) детей была выявлена транспозиция чревного ствола (coeliacomesenteric trunk). В одном (0,64%) случае выявлены признаки мешковидной аневризмы внутриорганных ветвей селезеночной артерии (СА). Согласно анализу, отмечена достоверная средняя корреляция диаметра СА и ВБА с возрастом детей (r = 0,58; p = 0,001). Согласно исследованию, диаметр собственной печеночной артерии у детей при флеботромбозе системы ВВ с преимущественным поражением верхней брыжеечной вены (ВБВ) был достоверно ниже, чем при поражении основного ствола ВВ и его ветвей (2,48 ± 0,23 мм против 3,15 ± 0,08 мм, p = 0,01). Диаметр СА у детей с преимущественным флеботромбозом селезеночной вены был достоверно меньше (4,26 ± 0,19 мм) в сравнении с детьми с поражением основного ствола ВВ и его притоков (4,9 ± 0,12 мм, р = 0,01), а также детей с флеботромбозом ВБВ (5,45 ± 0,41 мм, р = 0,05).Заключение. Таким образом, данные исследования свидетельствуют, что МСКТА является информативным методом оценки сопутствующих аномалий висцеральных артерий у детей с ВПГ. Возможность оценки существующих вариаций анатомических изменений висцеральных артерий у детей с ВБВК позволит снизить до минимума риск ятрогенного повреждения и неудовлетворительных исходов одного из наиболее сложного направлений – хирургии портальной гипертензии

Development of surface plasmon resonance-based sensor for detection of silver nanoparticles in food and the environment

Silver nanoparticles are recognized as effective antimicrobial agents and have been implemented in various consumer products including washing machines, refrigerators, clothing, medical devices, and food packaging. Alongside the silver nanoparticles benefits, their novel properties have raised concerns about possible adverse effects on biological systems. To protect consumer’s health and the environment, efficient monitoring of silver nanoparticles needs to be established. Here, we present the development of human metallothionein (MT) based surface plasmon resonance (SPR) sensor for rapid detection of nanosilver. Incorporation of human metallothionein 1A to the sensor surface enables screening for potentially biologically active silver nanoparticles at parts per billion sensitivity. Other protein ligands were also tested for binding capacity of the nanosilver and were found to be inferior to the metallothionein. The biosensor has been characterized in terms of selectivity and sensitivity towards different types of silver nanoparticles and applied in measurements of real-life samples—such as fresh vegetables and river water. Our findings suggest that human MT1-based SPR sensor has the potential to be utilized as a routine screening method for silver nanoparticles, that can provide rapid and automated analysis dedicated to environmental and food safety monitoring

A Complex of Special Jumping Exercises that Form the Correct Jumping Technique in Higher Educational Institutions

The article deals with the problems of managing special jumping exercises for teaching long jumps, students in athletics lessons, in higher educational institutions. The task of special physical training is to increase the mastery of the technical component of the physical performance of students, and the means and methods of the lesson should be focused on the development of high-speed and high-speed-strength (explosive) components of motor actions. The idea of the pedagogical experiment was to replace, in comparison with the control group, loads of jumping orientation with exercises of "explosive" orientation according to the methodology adopted in futsal

Silica-based organic nanocomposite for prevention of hazardous gas seeping into buildings through construction materials

This chapter deals with a novel nanocomposite specifically developed for chemical treatment of walls, floors, ceilings, roofs, etc. to prevent or limit exposure to dangerous gases seeping into buildings through constructive materials. The developed silica-based organic nanocomposite contains the mixture of polyethylhydrosiloxane and the solution of alkyltriethoxysilane in isopropanol with a tin-based catalyst. The nanocomposite fills micropores inside the concrete or another constructive material against hazardous gases, including volatile organic compounds, organic and inorganic gases, and radioactive gases emitting alpha particles. The method allows for reducing the coefficient of gas (air, Ar, 222Rn, CO, 85Kr, 133,135Xe, etc.) permeability 200-400 times. The consumption of chemicals depends on the porosity of the materials; it is equal to 0.2L/m2 for gypsum and 0.3-0.4L/m2 for concrete and cement, respectively. © 2018 Elsevier Inc. All rights reserved

Silica-based organic nanocomposite for prevention of hazardous gas seeping into buildings through construction materials

This chapter deals with a novel nanocomposite specifically developed for chemical treatment of walls, floors, ceilings, roofs, etc. to prevent or limit exposure to dangerous gases seeping into buildings through constructive materials. The developed silica-based organic nanocomposite contains the mixture of polyethylhydrosiloxane and the solution of alkyltriethoxysilane in isopropanol with a tin-based catalyst. The nanocomposite fills micropores inside the concrete or another constructive material against hazardous gases, including volatile organic compounds, organic and inorganic gases, and radioactive gases emitting alpha particles. The method allows for reducing the coefficient of gas (air, Ar, 222Rn, CO, 85Kr, 133,135Xe, etc.) permeability 200-400 times. The consumption of chemicals depends on the porosity of the materials; it is equal to 0.2L/m2 for gypsum and 0.3-0.4L/m2 for concrete and cement, respectively. © 2018 Elsevier Inc. All rights reserved