Singularities Motion Equations in 2-Dimensional Ideal Hydrodynamics of Incompressible Fluid

In this paper, we have obtained motion equations for a wide class of one-dimensional singularities in 2-D ideal hydrodynamics. The simplest of them, are well known as point vortices. More complicated singularities correspond to vorticity point dipoles. It has been proved that point multipoles of a higher order (quadrupoles and more) are not the exact solutions of two-dimensional ideal hydrodynamics. The motion equations for a system of interacting point vortices and point dipoles have been obtained. It is shown that these equations are Hamiltonian ones and have three motion integrals in involution. It means the complete integrability of two-particle system, which has a point vortex and a point dipole.Comment: 9 page

FORMATION OF QUALITY OF CONFECTIONERY PRODUCTS MADE OF WHEAT FLOUR OF DIFFERENT VARIETY AND STRAIN

The article is devoted to the study of culinary evaluation of confectionery products made of flour of varieties and strains of soft, Ethiopian and club wheat. It is proved that the culinary assessment of sugar and biscuit cookies varies considerably depending on the wheat variety and strain, the quality of which is most affected by the gluten deformation index. The ratio of the diameter of a cookie made of flour of the wheat variety and strain to its thickness varies from 1 to 9 points. The evaluation of the cookie surface is from 3 to 9 points, the look of the cookie cracking is from 5 to 9 points but the color is from 7 to 9 points. Cookies made of flour of Kulundynka and Pannonicus varieties, Ethiopian 1, LPP 1314 and NAK61/12 strains have the highest culinary evaluation (8–9 points) among studied varieties and strains. The overall evaluation of cookies of other varieties and strains is low and varies from 4.0 to 6.5 points. Porosity by pore size varies from 7 (average thick-walled pores up to 25 % of the pulp) to 9 points (small thick-walled pores). The surface and porosity by the uniform distribution of pores does not change and is 9 points. The overall evaluation of a cake-type bun is also very high (8.3–9.0 points). The overall evaluation of a biscuit cookie is high (7.5–9.0 points) but the highest evaluation is of flour of Pannonicus and Kulundynka varieties and Ethiopian 1, LPP 1314 and NAK61/12 strains. The largest volume was obtained from Kulundynka variety flour (392 cm3), Ethiopian 1 (390 cm3), LPP 2793 (389 cm3) and NAK61/12 strains (393 cm3) or by 5-8 % compared to the check variant (372 cm3). The volume of a biscuit cookie at the check variant level is obtained from flour of Uzhynok, Slavna, Schedra nyva, Emerino, Lupus, Ac Meckinon and Chornobrova varieties, club wheat and strains obtained by Triticum aestivum/ Triticum spelta. The volume of a cake-type bun does not vary significantly depending on the wheat variety and strain. Flour with gluten, the deformation index of which is more than 100 units, should be used for the production of sugar and biscuit cookies. However, the flour of all studied varieties and strains is suitable for baking a cake-type bun, as the culinary estimation is high. Cookies and biscuit made of flour of Pannonicus and Kulundynka varieties, Ethiopian 1, LPP 1314, LPP 2793 and NAK61/12 strains have the highest culinary evaluation (8.5–9.0 points)

The anapole moment and nucleon weak interactions

From the recent measurement of parity nonconservation (PNC) in the Cs atom we have extracted the constant of the nuclear spin dependent electron-nucleon PNC interaction, $\kappa = 0.442 (63)$; the anapole moment constant, $\kappa_a = 0.364 (62)$; the strength of the PNC proton-nucleus potential, $g_p = 7.3 \pm 1.2 (exp.) \pm 1.5 (theor.)$; the $\pi$-meson-nucleon interaction constant, $f_\pi \equiv h_\pi^{1} = [9.5 \pm 2.1 (exp.) \pm 3.5 (theor.)] \times 10^{-7}$; and the strength of the neutron-nucleus potential, $g_n = -1.7 \pm 0.8 (exp.) \pm 1.3 (theor.)$.Comment: Uses RevTex, 12 pages. We have added an explanation of the effect of finite nuclear siz

X-ray Diffraction Analysis of the Chromium-containing Electroerosion Powders of Micro - and Nanoparticles

Presents the results of a study of x-ray analysis of the powder obtained by electro erosion dispersing of waste nichrome H15N60 brand in kerosene lighting. The major phases in Nickel-chromium powder obtained by electroerosion dispersion method in kerosene lighting are Ni and Si2O

Calculation of nuclear spin-dependent parity-nonconserving amplitude for (7s,F=4) --> (7s,F=5) transition in Fr

Many-body calculation of nuclear spin-dependent parity-nonconserving amplitude for (7s,F=4) --> (7s,F=5) transition between hyperfine sublevels of the ground state of $^{211}$Fr is carried out. The final result is <7s,F=5 ||d_PNC|| 7s,F=4> = -0.49 10^{-10} i kappa a.u., where kappa is the dimensionless coupling constant. This is approximately an order of magnitude larger than similar amplitude in Cs. The dominant contribution to kappa is associated with the anapole moment of the nucleus.Comment: 4 pages, submitted to Phys.Rev.

СЫВОРОТОЧНОЕ СОДЕРЖАНИЕ РАСТВОРИМЫХ МОЛЕКУЛ CD25 И CD95 У ОЖОГОВЫХ БОЛЬНЫХ

Background: Burn injury is accompanied by modulation of the many components of immunity, including the system regulation, which includes soluble forms of leukocyte differentiation molecules. Earlier in burn patients, we detected changes in serum levels of soluble differentiation molecules CD25 (sCD25) and CD95 (sCD25). Despite the existence of data on change of serum level of the soluble molecules CD25 and CD95 in the blood of patients with a burn trauma, there are no data on particular cell producers.Aims: To conduct the analysis of serum level of the molecules sCD25 and sCD95 in the blood of patients with acute burn trauma in comparison with peripheral blood cells composition to obtain data on the types of cells that produce the molecules sCD25 and sCD95.Materials and methods: Blood samples from 24 heavily burnt patients aged 16 to 77 years were studied. Determination of sCD25 and sCD95 molecules serum levels was performed by ELISA. Number of CD45+CD25+ lymphocytes, CD45+CD95+ cells, CD14+CD95+ monocytes, CD16b+CD95+ neutrophils, and RFMI (relative mean fluorescence intensity) was evaluated by flow cytometry.Results: In the first five days of the date of burn sCD25 and sCD95 serum levels tended to increase. sCD25 molecules contents in the blood of surviving and dead patients did not depend on the relative content of CD45+CD25+ lymphocytes, RFMI index, but correlated with the absolute level of lymphocytes and leukocytes. Serum levels of sCD95 molecules showed the dependence on the absolute neutrophil count and leukocytes in the survivors and on the absolute content of lymphocytes, neutrophils, and leukocytes in patients who died.Conclusions: The findings suggest that the lymphocytes in the early period of burn disease are the main cells-producers of sCD25 and affect the increase of its content in the blood serum not due to changes in the density of CD25 molecules expression on their membrane followed by increased shedding but by increasing the number of CD25 positive cells. The main cells-producers of sCD95 molecules for survivors in the early period of burn disease are likely to be the neutrophils and lymphocytes; in the dead patients, the main producers are neutrophils.Обоснование. Ожоговая травма сопровождается модуляцией многих звеньев иммунитета, в том числе системой регуляции, в состав которой входят растворимые формы лейкоцитарных дифференцировочных молекул. Ранее у ожоговых больных были обнаружены изменения в сывороточном содержании растворимых дифференцировочных молекул CD25 (sCD25) и CD95 (sCD25). Несмотря на наличие данных об изменении сывороточного содержания растворимых молекул CD25 и CD95 в крови пациентов с ожоговой травмой, отсутствуют данные о том, какими клетками они продуцируются.Цель исследования — провести анализ сывороточного уровня молекул sCD25 и sCD95 в крови пациентов в остром периоде ожоговой травмы в сопоставлении с популяционным составом клеток периферической крови с целью получения данных о типах клеток, продуцирующих молекулы sCD25 и sCD95.Методы. Исследованы образцы крови 24 тяжело обожженных пациентов в возрасте от 16 до 77 лет. Определение сывороточного содержания молекул sCD25 и sCD95 проводили иммуноферментным методом. Количество CD45+CD25+ лимфоцитов, CD45+CD95+ клеток, CD14+CD95+ моноцитов, CD16b+CD95+ нейтрофилов и RFMI (relative mean fluorescence intensity) оценивали с помощью проточной цитофлуорометрии.Результаты. В первые пять суток от момента ожога сывороточное содержание sCD25 и sCD95 имело тенденцию к повышению. Содержание молекул sCD25 как у выживших, так и погибших больных не зависело от относительного содержания CD45+CD25+ лимфоцитов, индекса RFMI, но коррелировало с абсолютным содержанием лимфоцитов и лейкоцитов. Сывороточный уровень молекул sCD95 обнаруживал зависимость от абсолютного содержания нейтрофилов и лейкоцитов у выживших больных и абсолютного содержания лимфоцитов, нейтрофилов и лейкоцитов — у погибших.Заключение. Полученные данные позволяют заключить, что лимфоциты в раннем периоде ожоговой болезни являются основными клетками-продуцентами sCD25 и влияют на повышение их содержания в сыворотке крови не за счет изменения плотности экспрессии на их мембране молекул CD25 с последующим усилением шеддинга, а путем увеличения количества СD25-положительных клеток. Основными клетками-продуцентами молекул sCD95 у выживших больных в раннем периоде ожоговой болезни, вероятно, являются нейтрофилы и лимфоциты, у погибших — нейтрофилы.

Gorenstein Latin squares

We introduce the notion of a Gorenstein Latin square and consider loops and quasigroups related to them. We study some properties of normalized Gorenstein Latin squares and describe all of them with order n≤8

Влияние обработки почвы и минерального питания на динамику биологической активности и NPK при возделывании ярового ячменя

The use of scientifically based doses of fertilizers in the cultivation of crops does not lead to the removal of nutrients from the natural reserves of the organic and mineral soil by microflora. At the same time, the methods and terms for the introduction of mineral fertilizers must be linked with the technology of soil preparation and moisture supply. Nitrogen fertilizers, because of their rapid volati-lization, are recommended to be applied for pre-sowing cultivation with sealing in the surface layer, and phosphorous fertilizers, as inactive — along with the main soil treatment. In this connection, in studies of the significant influence of the methods of basic soil cultivation with and without application of nitrogen, its dynamics along layers are not revealed. Deep soil-free tillage allows significantly more accumulation and longer storage of moisture in the soil layers; In comparison with the classical plowing and dumping plowing and planing in a meter layer of soil, the additional moisture reserves before sowing the crop are respectively 300 and 230 m3 / ha, in the tubing phase — barley — 256 and 189 m3/ha, in the phase of milk ripeness — 270 And 128 m3/ha. Deficiency of moisture reduces the biological activity of the soil, in this regard, moisture-saving methods of basic soil cultivation are especially important in conditions of rain-fed farming, not only on the yield of agricultural crops, but also on the processes of humus formation. The total accumulation of amino acids in the half-meter layer in the variant with deep soil-free tillage before sowing barley was 424 μg amine / G of cloth, in the phase of tubing — ear — 400 μg amine / G canvas, in the phase of milk ripeness — 210 μg amine / G of canvas. The values obtained are higher in comparison with the control data and the variant with planar tillage at 7 and 18%, 48 and 32%, 10 and 36% respectively. Positive dynamics in terms of productive moisture and accumulation of amino acids in the variant with deep soil-free soil treatment, application of calculated phosphorus doses for main processing and nitrogen for pre-sowing cultivation, had an effect on a significant increase in grain relative to control at 0.4 t/ha, Processing — at 0.35 t/ha.Применение научно обоснованных доз удобрений при возделывании сельскохозяйственных культур не приводит к выносу питательных элементов из естественных запасов органической и минеральной части почвы микрофлорой. При этом способы и сроки внесения минеральных удобрений необходимо увязывать с технологией подготовки почвы и влагообеспеченностью. Азот-ные удобрения из-за их быстрого улетучивания рекомендуется вносить под предпосевную культива-цию с заделкой в поверхностный слой, а фосфорные, как малоподвижные — вместе с основной обработкой почвы. В связи с этим в исследованиях существенного влияния способов основной обработки почвы с внесением и без внесения азота на его динамику по слоям не выявлено. Глубокая безотвальная обработка почвы позволяет существенно больше накапливать и дольше сохранять влагу в почвенных слоях; в сравнении с классической лемешно-отвальной вспашкой и плоскорезной обработкой в метровом слое почвы дополнительные запасы влаги перед посевом культуры составля-ют соответственно 300 и 230 м3/га, в фазу трубкование — колошение ячменя — 256 и 189 м3/га, в фазу молочной спелости — 270 и 128 м3/га. Дефицит влаги снижает биологическую активность почвы, в связи с этим влагосберегающие способы основной обработки почвы имеют особенно большое значение в условиях неорошаемого земледелия не только на урожайность сельскохозяйст-венных культур, но и на процессы гумусообразования. Суммарное накопление аминокислот в полу-метровом слое в варианте с глубокой безотвальной обработкой почвы перед посевом ячменя состав-ляло 424 мкг амин. / г полотна, в фазу трубкование — колошение — 400 мкг амин. / г полотна, в фазу молочной спелости — 210 мкг амин. / г полотна. Полученные значения выше в сравнении с данными по контролю и варианту с плоскорезной обработкой почвы на 7 и 18%, 48 и 32%, 10 и 36% соответст-венно. Положительная динамика по продуктивной влаге и накоплению аминокислот в варианте с глубокой безотвальной обработкой почвы, внесением расчетных доз фосфора под основную обра-ботку и азота под предпосевную культивацию подействовала на существенную прибавку зерна по отношению к контролю на уровне 0,4 т/га, варианту с мелкой обработкой — на уровне 0,35 т/га

QCD Radiative Corrections to the Leptonic Decay Rate of the B_c Meson

The QCD radiative corrections to the leptonic decay rate of the $B_c$ meson are calculated using the formalism of nonrelativistic QCD (NRQCD) to separate short-distance and long-distance effects. The $B_c$ decay constant is factored into a sum of NRQCD matrix elements each multiplied by a short-distance coefficient. The short-distance coefficient for the leading matrix element is calculated to order $\alpha_s$ by matching a perturbative calculation in full QCD with the corresponding perturbative calculation in NRQCD. This short-distance correction decreases the leptonic decay rate by approximately $15\%$.Comment: Changed Eq. 2 to read 1/(8 \pi), put in a missing i M_{B_c} in Eq. 18, and put in a normalisation factor of 2 M_{B_c} in Eq. 19