Heat capacity of nanostructured multiferroics BiFe1–x Zn x O3

The heat capacity of ceramic BiFe1–x Zn x O3 multiferroics has been studied in the temperature range 150–750 K. It is found that the antiferromagnetic transition temperature T N slightly shifts to lower temperatures as the concentration of the substitutional impurity Zn increases. An excess heat treatment has been observed; it is considered as the Schottky anomaly in three-level states

Experimental study of the skeleton plasty of the inguinal canal

In the study of the influence of polypropylene mesh on the state of tissues surrounding the spermatic cord, the implant was experimentally administered to 20 dogs. Inflammatory infiltration and adhesions in the implantation zone were not revealed, collagenogenesis is minimal. Fixation of the endoprosthesis to the peritoneum is rather weak. There was a continuous layer of mesothelium, its thickness was the same throughout the cut of the drug, the fenestration zones were not on the entire surface. At the same time, fibroplastic changes in the surrounding tissues were noted. Thus, the implant performs the frame function, being a matrix for the germination of its own fibrous fibers. Contact of the endoprosthesis with the elements of the spermatic cord, due to the layer of the peritoneum, is absent and, as a result, polypropylene mesh does not cause severe inflammatory reactions in the elements of the spermatic cord.При изучении влияния полипропиленовой сетки на состояние тканей, окружающие семенной канатик проводилось экспериментальное введение импланта 20 собакам. Воспалительной инфильтрации и спаечного процесса в зоне имплантации не выявлено, коллагеногенез минимален. Фиксация самого эндопротеза к брюшине довольно слабая. Имелся сплошной слой мезотелия, его толщина была одинаковой на протяжении среза препарата, зон фенестрации не было на всей поверхности. При этом отмечали фибропластические изменения в окружающих тканях. таким образом, имплантат выполняет каркасную функцию, являясь матрицей для прорастания собственных фиброзных волокон. контакт эндопротеза с элементами семенного канатика, благодаря прослойке из брюшины, отсутствует и, как следствие, полипропиленовая сетка не вызывает выраженных воспалительных реакций в элементах семенного канатика

Modern principles oftreatment of vaginal dysbiosisin women with uterine Myoma

According to world statistics, about 30% of women are subjected to surgery on the genitals, and 1 place is occupied by surgery for uterine fibroids. In the study of biocenosis of the vagina and cervical canal in 67% of women with uterine fibroids in the vaginal discharge revealed a pattern of bacterial vaginosis. To date, the issue of complex treatment of vaginal dysbiosis in patients with uterine myoma remains relevant and insufficiently studied. The frequency of pyo-inflammatory postoperative diseases is increased in women with all types of vaginal microcenosis. Considering that operations concerning uterine fibroids take the first place among gynecologic operations, it is necessary to carry out complex treatment of a dysbacteriosis of a vagina which leads to postoperative complications.Согласно мировой статистике, около 30% женщин подвергаются хирургическим вмешательствам на половых органах, причем 1 место занимают операции по поводу миомы матки. При изучении биоценоза влагалища и цервикального канала у 67% женщин с миомой матки во влагалищном отделяемом выявлена картина бактериального вагиноза. На сегодняшний день остается актуальным и недостаточно изученным вопрос о комплексном лечении дисбактериоза влагалища у больных с миомой матки. Частота гнойно-воспалительных послеоперационных заболеваний повышена у женщин со всеми видами нарушения влагалищного микроциноза. Учитывая то, что операции по поводу миомы матки занимают первое место среди гинекологических операций, необходимо проводить комплексное лечение дисбактериоза влагалища, который приводит к послеоперационным осложнениям

Modern concepts of anal sphincter insufficiency and its treatment

The international clinical analysis of the treatment of topical issues - failure of the anal sphincter, which has not only medical but also social value is presented. The comparative analysis of effectiveness of suggested above operating methods and modern approaches of different surgical methods of anal incontinence correction was conducted.Представлен мировой клинический анализ лечения актуальной проблемы – недостаточности анального сфинктера, которая имеет не только медицинское, но и социальное значение. Проведен сравнительный анализ эффективности как предлагавшихся ранее оперативных вмешательств, так и современные подходы различных хирургических методик коррекции анальной инконтиненции

Agronomical Field Testing of New Kinds of Multicomponent Mineral Fertilizers

Analysis of modern scientific literature and patents has shown the absence of acid-free production technology of a mechanically activated multicomponent mineral fertilizer containing water-holding substances. Experimental researches connecting with mechanochemical activation and physicochemical properties of Karatau phosphorites prove a possibility of development of a new multicomponent mineral fertilizer. Application of inorganic and organic activators considerably improves qualities of fertilizers because the developed fertilizer mixtures contain nitrogen, phosphorus, potassium, humate and microelements. The suggested technology intends to use wastes of coal mining that leads to presence of humates and microelements in the end product. It was determined, that content of total nitrogen, phosphorus and potassium depends on a form of nitrogen-phosphorus-potassium-containing substances. The given article contains data of researches connecting with use of multicomponent mineral fertilizers in field conditions for cotton cultivation on irrigated light sierozems consisting of soil-forming rocks of loess and loess-type clay loams. The research results show the increase of soil’s fertility and cotton’s productivity. Studying of agronomic efficiency of the new kinds of mechanically activated multicomponent mineral fertilizers at the cultivation of a bean-cereal mixture has been carried out in the Negorelsk experimental nursery-garden of the Belarus State Technical University on a sod-podzol sandy-loam soil and has shown the essential influence on productivity and quality of the bean-cereal mixture. The researches fulfilled on a sod-podzol sandy-loam soil have revealed the essential increase of key indicators of feed productivity. Application of the mineral fertilizers has promoted increase of nitrogen, phosphorus and potassium content in green plants. In so doing content of calcium and magnesium in green mass depends from quantity of the fertilizer used to a smaller extent. An essential difference of crop capacity and feed productivity indicators depending on forms of the applied mineral fertilizers has not been found

Effects of soil warming and nitrogen foliar applications on bud burst of black spruce

Key message: In mature black spruce, bud burst process is anticipated by soil warming, while delayed by foliar applications of nitrogen; however, the effects depend on growth conditions at the site. Abstract: The observation of phenological events can be used as biological indicator of environmental changes, especially from the perspective of climate change. In boreal forests, the onset of the bud burst is a key factor in the length of the growing season. With current climate change, the major factors limiting the growth of boreal trees (i.e., temperature and nitrogen availability) are changing and studies on mature trees are limited. The aim of this study was to investigate the effects of soil warming and increased nitrogen (N) deposition on bud burst of mature black spruce [Picea mariana (Mill.) BSP]. From 2008 onwards, an experimental manipulation of these environmental growth conditions was conducted in two stands (BER and SIM) at different altitudes in the boreal forest of Quebec, Canada. An increase in soil temperature (H treatment) and a canopy application of artificial rain enriched with nitrogen (N treatment) were performed. Observations of bud phenology were made during May–July 2012 and 2013. In BER, H treatment caused an anticipation (estimated as 1–3 days); while N treatment, a delay (estimated as 1–2 days but only in 2012) in bud burst. No treatments effect was significant in SIM. It has been demonstrated that soil temperature and N availability can play an important role in affecting bud burst in black spruce but the effects of these environmental factors on growth are closely linked with site conditions

Measurement of the Positive Muon Anomalous Magnetic Moment to 0.20 ppm

We present a new measurement of the positive muon magnetic anomaly, a_{μ}≡(g_{μ}-2)/2, from the Fermilab Muon g-2 Experiment using data collected in 2019 and 2020. We have analyzed more than 4 times the number of positrons from muon decay than in our previous result from 2018 data. The systematic error is reduced by more than a factor of 2 due to better running conditions, a more stable beam, and improved knowledge of the magnetic field weighted by the muon distribution, ω[over ˜]_{p}^{'}, and of the anomalous precession frequency corrected for beam dynamics effects, ω_{a}. From the ratio ω_{a}/ω[over ˜]_{p}^{'}, together with precisely determined external parameters, we determine a_{μ}=116 592 057(25)×10^{-11} (0.21 ppm). Combining this result with our previous result from the 2018 data, we obtain a_{μ}(FNAL)=116 592 055(24)×10^{-11} (0.20 ppm). The new experimental world average is a_{μ}(exp)=116 592 059(22)×10^{-11} (0.19 ppm), which represents a factor of 2 improvement in precision

Диагностическая эффективность перфузионной компьютерной томографии миокарда с чреспищеводной электрокардиостимуляцией у больных с исходным диагнозом «острый коронарный синдром»

Introduction. Computed tomography angiography (CTA) is widely used to detect atherosclerotic changes in coronary arteries (CA). However, the method is limited by the impossibility to perform functional assessment of detected stenoses. Perfusion computed tomography of the myocardium (PCT) can be used for this purpose.Aim of the study. To assess diagnostic accuracy of PCT of the myocardium with transesophageal electrocardiostimulation (TEES) and stress-echocardiography (stress-echoCG) with veloergometry (VEM) in detection of transient ischemia in patients with initial diagnosis of “acute coronary syndrome” (ACS) with borderline stenoses (50–75%) in CA in relation to measurements of fractional flow reserve (FFR).Materials and Methods. The study included 30 patients with the initial diagnosis of ACS with borderline (50–75%) stenoses in CA according to CTA or coronary angiography (CAG). Subsequently, they underwent myocardial PCT with 320-row detector with TEES, as well as stress-echoCG with VEM. Invasive FFR measurement was used as a reference method. FFR value < 0.8 indicated hemodynamic significance of stenosis. Myocardial perfusion was assessed visually. Regional myocardial contractility of the left ventricle was assessed by stress-echoCG.Results. All patients were examined according to the stated protocol. PCT with TEES revealed FFR-significant stenoses with sensitivity, specificity, prognostic value of positive result and prognostic value of negative result 56, 93, 90, 65% respectively, stress-echoCG with VEM 62, 93, 91, 68% respectively.Conclusion. Myocardial PCT with TEES enables to detect perfusion defects associated with transient ischemia, and the diagnostic accuracy of the method in comparison with FFR is comparable with the already well-proven stress-echoCG. The use of PCT with TEES in combination with CTA can be considered as a promising diagnostic tool in patients without known coronary anatomy and with suspected ACS.Введение. Компьютерная томографическая ангиография (КТА) широко используется для выявления атеросклеротических изменений в коронарных артериях (КА). Однако метод ограничен невозможностью проведения функциональной оценки выявленных стенозов. С этой целью может использоваться перфузионная компьютерная томография миокарда (ПКТ).Цель исследования. Оценить диагностическую точность методов ПКТ миокарда с чреспищеводной электрокардиостимуляцией (ЧПЭС) и стресс-эхокардиографии (стресс-ЭхоКГ) с велоэргометрией (ВЭМ) в выявлении преходящей ишемии у больных с исходным диагнозом «острый коронарный синдром» (ОКС) с пограничными стенозами (50–75%) в КА по отношению к измерениям фракционного резерва кровотока (ФРК).Материалы и методы. В исследование были включены 30 больных с исходным диагнозом ОКС с пограничными (50–75%) стенозами в КА по данным КТА или коронарной ангиографии (КАГ). Впоследствии им были выполнены ПКТ миокарда на томографе с 320-рядным детектором с ЧПЭС, а также стресс-ЭхоКГ с ВЭМ. В качестве референтного метода использовалось инвазивное измерение ФРК. Значение показателя ФРК < 0,8 указывало на гемодинамическую значимость стеноза. Перфузия миокарда оценивалась визуально. При проведении стресс-ЭхоКГ оценивалась региональная сократимость миокарда левого желудочка.Результаты. Все больные обследованы согласно заявленному протоколу. ПКТ с ЧПЭС выявила ФРК-значимые стенозы с чувствительностью, специфичностью, прогностической ценностью положительного результата и прогностической ценностью отрицательного результата 56, 93, 90, 65% соответственно, стресс-ЭхоКГ с ВЭМ 62, 93, 91, 68% соответственно.Выводы. ПКТ миокарда с ЧПЭС позволяет выявить дефекты перфузии, ассоциированные с преходящей ишемией, а диагностическая точность метода при сравнении с ФРК сопоставима с уже хорошо зарекомендовавшей себя стресс-ЭхоКГ. Использование ПКТ с ЧПЭС в комбинации с КТА можно рассматривать как перспективный диагностический инструмент у больных без известной коронарной анатомии и с подозрением на ОКС