Thermal nonlocal Nambu--Jona-Lasinio model in the real time formalism

The real-time formalism at finite temperature and chemical potential for the nonlocal Nambu--Jona-Lasinio model is developed in the presence of a Gaussian covariant regulator. We construct the most general thermal propagator, by means of the spectral function. As a result, the model involves the propagation of massive quasiparticles. The appearance of complex poles is interpreted as a confinement signal, and in this case we have unstable quasiparticles with a finite decay width. An expression for the propagator along the critical line, where complex poles start to appear, is also obtained. A generalization to other covariant regulators is proposed.Comment: 9 pages, 5 figures, minor changes, to appear in Phys. Rev.

η\eta and η′\eta' mesons in the Dyson-Schwinger approach at finite temperature

We study the temperature dependence of the pseudoscalar meson properties in a relativistic bound-state approach exhibiting the chiral behavior mandated by QCD. Concretely, we adopt the Dyson-Schwinger approach with a rank-2 separable model interaction. After extending the model to the strange sector and fixing its parameters at zero temperature, T=0, we study the T-dependence of the masses and decay constants of all ground-state mesons in the pseudoscalar nonet. Of chief interest are $\eta$ and $\eta^\prime$. The influence of the QCD axial anomaly on them is successfully obtained through the Witten-Veneziano relation at T=0. The same approach is then extended to T>0, using lattice QCD results for the topological susceptibility. The most conspicuous finding is an increase of the $\eta^\prime$ mass around the chiral restoration temperature $T_{\rm Ch}$, which would suggest a suppression of $\eta^\prime$ production in relativistic heavy-ion collisions. The increase of the $\eta^\prime$ mass may also indicate that the extension of the Witten-Veneziano relation to finite temperatures becomes unreliable around and above $T_{\rm Ch}$. Possibilities of an improved treatment are discussed.Comment: 13 pages, 15 figure

Effects of mesonic correlations in the QCD phase transition

The finite temperature phase transition of strongly interacting matter is studied within a nonlocal chiral quark model of the NJL type coupled to a Polyakov loop. In contrast to previous investigations which were restricted to the mean-field approximation, mesonic correlations are included by evaluating the quark-antiquark ring sum. For physical pion masses, we find that the pions dominate the pressure below the phase transition, whereas above T_c the pressure is well described by the mean-field approximation result. For large pion masses, as realized in lattice simulations, the meson effects are suppressed.Comment: 11 pages, 4 figures; version accepted for publication in Yad. Fiz., text extended, 1 figure adde

Scalar sigma meson at finite temperature in nonlocal quark model

Properties and temperature behavior of pi and sigma bound states are studied in the framework of the nonlocal model with a separable interaction kernel based on the quark Dyson-Schwinger and the meson Bethe-Salpeter equations. M_pi(T), f_pi(T), M_sigma(T) and Gamma_{sigma -> pi pi}(T) are considered above and below the deconfinement and chiral restoration transitions.Comment: 8 pages, 2 figures, Talk at the Round Table Discussion "Searching for the mixed phase of strongly interacting matter at the JINR Nuclotron", JINR, Dubna, July 7 - 9, 2005. Submitted to Phys.Part.Nucl.Let

QCD equation of state in a virial expansion

We describe recent three-flavor QCD lattice data for the pressure, speed of soun d and interaction measure at nonzero temperature and vanishing chemical potentia l within a virial expansion. For the deconfined phase we use a phenomenological model which includes non-pert urbative effects from dimension two gluon condensates that reproduce the free en ergy of quenched QCD very well. The hadronic phase is parameterized by a generalized resonance-gas model. Furthermore, we extend this approach to finite quark densities introducing an ex plicit $\mu$-dependence of the interaction. We calculate pressure, quark-number density, entropy and energy density and compare to results of lattice calculatio ns. We, additionally, investigate the structure of the phase diagram by calculating the isobaric and isentropic lines as well as the critical endpoint in the ($T, \mu_q$)-plane.Comment: 9 pages, 11 figures. Submitted to Phys. Rev.

ЭФФЕКТИВНОСТЬ ИСПОЛЬЗОВАНИЯ ВЫСОКОБЕЛКОВЫХ КОРМОВЫХ ДОБАВОК В РАЦИОНАХ КОРОВ

In the Republic of Tajikistan, linseeds, cotton seeds and rape seeds are used for producing vegetable oil. The authors highlight that until now the impact of cotton, linseed and rapeseed cake, which are seen as high-protein feed additives, on the dairy productivity, composition and properties of milk are not sufficiently investigated for the conditions of the country. The paper highlights the results of two scientific and economic experiments on investigation of the impact caused by cotton, linseed and rapeseed cake on the milk productivity, quality and physical and chemical parameters of milk of highproductive cows of the Black-and-WhiteTajik type breed. The researchers found out that application of various seed cakes when feeding cows in DIM increases the milk yield and improves the quality and physical and chemical parameters of milk. The authors observed experimental cows which received different types of seed cake and the milk their produced and found out that experimental cows exceeded 5.9-12.3 % according to the parameters of milk of natural fat; 4% milk - on 12.0-17.9 %. The cows from experimental groups produced 6.55-11.51 kg milk fat more. Feed costs in energetic feed unit pro 1 kg of 4-% -milk were 7.7-15.2% lower in the experimental groups of cows in comparison with the control group. According to organoleptic and sanitary-hygienic parameters, the milk produced by the cows from experimental groups was of higher quality and fulfilled the requirements of the state standard for purchased milk. Fat concentration increased on0.08-0.19%; total protein - on 0.07-0.15, dry skimmed milk residue - on 0.07-0.16 and dry matter - on 0.15-0.35%. According to the chemical composition, the milk produced by cows, which were fed with linseed cake was the best one. The content of milk sugar, ash, calcium and phosphorus was approximately the same in all the groups. The cost of 1 centner of milk in the experimental groups was 6.3-12.7% lower, and the profitability level of milk production was 9.8-16.3% higher in comparison with the control groups.В Республике Таджикистан для производства растительного масла наряду с семенами хлопчатника используют семена льна и рапса. Однако до настоящего времени в условиях республики вопросы влияния хлопчатникового, льняного и рапсового жмыхов, которые являются высокобелковыми кормовыми добавками, на молочную продуктивность, состав и свойства молока коров остаются не изученными. В данной статье изложены результаты двух научно-хозяйственных опытов по изучению влияния хлопчатникового, льняного и рапсового жмыхов на молочную продуктивность, качество и физико-химические показатели молока высокопродуктивных коров таджикского типа черно-пестрой породы. Установлено, что использование различных жмыхов в кормлении коров в период раздоя повышает молочность коров, улучшает качество и физико-химические показатели молока. По удою молока натуральной жирности опытные группы коров, получавшие различные виды жмыха, превосходили контрольных на 5,9–12,3, а по удою 4%-го молока – на 12,0–17,9%. От коров опытных групп получено на 6,55–11,51 кг больше молочного жира. Затраты кормов в ЭКЕ на 1 кг молока 4-%-й жирности в опытных группах коров были на 7,7–15,2% ниже по сравнению с контролем. По органолептическим и санитарно-гигиеническим показателям молоко, полученное от коров опытных групп, было высшего сорта и отвечало требованиям государственного стандарта на закупаемое молоко. Содержание жира увеличилось на 0,08–0,19%, общего белка – на 0,07–0,15, сухого обезжиренного молочного остатка – на 0,07–0,16, сухого вещества – на 0,15–0,35%. По химическому составу наилучшим оказалось молоко коров, которым скармливали льняной жмых. Примерно одинаковым во всех группах было содержание молочного сахара, золы, кальция, фосфора. Себестоимость 1 ц молока в опытных группах была на 6,3–12,7% ниже, а уровень рентабельности производства молока – на 9,8–16,3% выше по сравнению с контрольными группами

СТРУКТУРА ИЗМЕНЧИВОСТИ НЕКОТОРЫХ ПРЯНО-АРОМАТИЧЕСКИХ РАСТЕНИЙ ПО СОДЕРЖАНИЮ СУММАРНЫХ АНТИОКСИДАНТОВ В ЭКОЛОГО-ГЕОГРАФИЧЕСКОМ ЭКСПЕРИМЕНТЕ

The work presents the results of the study of the antioxidant activity of fruits (clapper seeds) of aromatic plants, (Apiaceae, Lindl.): dill (Anethum graveolens L.) and coriander (Coriandrum sativum L.). The plant materials for determining the total content of antioxidants were collected during an ecological-geographical experiment at the Gunib and Tsudakhar experimental bases of the Mountain Botanical Garden of the Dagestan Scientific Center, Russian Academy of Sciences, at altitudes of 1100 and 1730 meters above sea level, simulating the conditions of mountain-valley and upper mountain climate zones, respectively. Determination of the total content of antioxidants in aqueous solutions was performed by the amperometric method on “Tsvet Yauza 01 -AA” instrument. Studies have shown the variability of accumulation of antioxidants, depending on the type, variety, height above sea level of the place of growth of the sample. In terms of the total content of antioxidants, the effect of the cultivation area substantially exceeded the inter-variety differences. In the studied species, intervarietal differences appeared more clearly in A. graveolens, which correlated with the latitude of the range and the ecological amplitude of growth of these species in natural habitats. The obtained data on the study of antioxidant activity in some aromatic medicinal plants allow to evaluate their biological value, to recommend more distinguished samples for cultivation. Plant materials with a high accumulation of antioxidants that can neutralize the harmful effects of oxidative stress can be used as a source of natural polyphenols, natural antioxidants in food. This methodical approach, demonstrated in the work, can serve as a methodological basis for studying the “genotype x environment” interaction and express assessment of varieties, clones, populations, and other units of accounting for the stability and sustainability of the parameters studied, including the content of antioxidants.В работе представлены результаты изучения антиоксидантной активности плодов у сортов пряно-ароматических растений семейства зонтичных (Apiaceae, Lindl.): укропа (Anethum graveolens L.) и кориандра (Coriandrum sativum L.). Сырье для определения суммарного содержания антиоксидантов собрано в ходе эколого-географического эксперимента на Гунибской и Цудахарской экспериментальных базах Горного ботанического сада ДНЦ РАН, на высотах 1100 и 1730 метров над уровнем моря, моделирующих условия горно-долинного и верхнего горного климатических поясов, соответственно. Определение суммарного содержания антиоксидантов в водных растворах, проводили амперометрическим методом на приборе «Цвет Яуза 01 – АА», основанный на измерении электрического тока в электрохимической ячейке, возникающего при подаче на электрод определенного потенциала. Проведенные исследования показали, изменчивость накопления антиоксидантов в зависимости от вида, сорта, высоты над уровнем моря места произрастания образца. По суммарному содержанию антиоксидантов влияние участка выращивания существенно превышали межсортовые различия. У изученных видов межсортовые различия четче проявились у A. graveolens, что на наш взгляд скоррелировано с широтой ареала и экологической амплитудой произрастания этих видов в природных местообитаниях. Полученные данные по изучению антиоксидантной активности в некоторых пряно-ароматических лекарственных растений позволяют оценить их биологическую ценность, рекомендовать более отличившиеся образцы для культивирования. Растительное сырье высоким накоплением антиоксидантов, способные нейтрализовать вредное воздействие окислительного стресса, могут использованы в качестве источника природных полифенолов, природных антиоксидантов пищевых продуктах. Методический подход, продемонстрированный в работе может послужить методической основой для изучения взаимодействия «генотип x среда» и экспресс оценки сортов, клонов, популяций и других единиц учета, на стабильность и устойчивость изучаемых параметров, в том числе и содержания антиоксидантов

Лечение пациентов с гнойно-некротическими ранами с использованием внутривенного лазерного облучения крови (405 нм)

Objective: to analyze the effectiveness of purulent-necrotic wounds management using intravenous laser irradiation of blood (405nm). Materials and methods. Object of study – patients with purulent-necrotic wounds. Clinical studies and analysis of the intravenous laser blood irradiation (405 nm) effect on the wound healing process and on the healing speed of purulent soft tissues wounds in patients with type 2 diabetes mellitus were carried out. Results. It was found that the use of intravenous laser blood irradiation (405 nm) is a highly effective method for the treatment of purulent soft tissues wounds, which allows to reduce the number of complications and shorten the time for complete epithelization of purulent wounds by 7–10 days compared with traditional treatment. Цель исследования: анализ эффективности методики лечения больных гнойно-некротическими ранами с использованием внутривенного лазерного облучения крови (405 нм). Материалы и методы исследования. Объект исследования – пациенты с гнойно-некротическими ранами. В процессе работы проводили клинические исследования и анализ влияния внутривенного лазерного облучения крови (405 нм) на течение раневого процесса и на скорость заживления гнойных ран мягких тканей больных сахарным диабетом II типа. Результаты исследования. Установлено, что использование внутривенного лазерного облучения крови (405 нм) является высокоэффективным методом лечения гнойных ран мягких тканей, позволяющим уменьшить количество осложнений и сократить сроки полной эпителизации гнойных ран на 7–10 суток по сравнению с традиционным лечением.

CarotidSCORE.RU — risk stratification for complications after carotid endarterectomy

Aim. To demonstrate the first Russian computer program (carotidscore.ru) for risk stratification of postoperative complications of carotid endarterectomy (CE).Material and methods. The present study is based on the analysis of a multicenter Russian database including 25812 patients after CE operated on from January 1, 2010 to April 1, 2022. The following types of CE were implemented: conventional CE with patch angioplasty — 6814 patients; eversion CE — 18998 patients. Following postoperative complications were assessed during the study: death, stroke, myocardial infarction (MI), composite endpoint (death + stroke + MI).Results. During inhospital postoperative period, 0,18% of participants died, while 0,14% had MI, 0,35% — stroke. The composite endpoint was recorded in 0,68%. For each factor present in patients, a predictive coefficient was estimated. The predictive coefficient was considered as a numerical parameter reflecting the strength of the effect of each factor on the development of postoperative complications. Based on this equation, predictive coefficients were calculated for each factor present in patients in our study. The total contribution of these factors was reflected as a percentage and denoted the risk of postoperative complications with a minimum of 0% and a maximum of 100%. On the basis of obtained calculations, a CarotidSCORE program was created. Its graphical interface is based on the QT framework. It is possible not only to estimate the risk of a complication, but also to save all data about a patient in JSON format. The CarotidSCORE program contains 47 patient parameters, including clinical, demographic, anamnestic and angiographic characteristics. It makes it possible to choose one of the four CE types, which will provide an accurate stratification of the complication risk for each of them.Conclusion. CarotidSCORE (carotidscore.ru) may determine the probability of postoperative complications in patients undergoing CE

Ten-year long-term outcomes of conventional and eversion carotid endarterectomy. Multicenter study

Aim. To analyze the immediate and long-term outcomes of eversion and conventional carotid endarterectomy (CE) with patch angioplasty.Material and methods. For the period from February 1, 2006 to September 1, 2021, the present retrospective multicenter open comparative study included 25106 patients who underwent CE. Depending on the technique of operation, the following groups were formed: group 1 (n=18362) — eversion CE; group 2 (n=6744) — conventional CE with patch angioplasty. The long-term follow-up period was 124,7±53,8 months.Results. In the hospital postoperative period, the groups were comparable in incidence of all complications: lethal outcome (group 1: 0,19%, n=36; group 2: 0,17%, n=12; p=0,89; odds ratio (OR) =1,1; 95% confidence interval (CI) =0,57- 2,11); myocardial infarction (MI) (group 1: 0,15%, n=28; group 2: 0,13%, n=9; p=0,87; OR=1,14; 95% CI=0,53-2,42); stroke (group 1: 0,33%, n=62; group 2: 0,4%, n=27; p=0,53; OR=0,84; 95% CI=0,53-1,32); bleeding with hematoma formation (group 1: 0,39%, n=73; group 2: 0,41%, n=28; p=0,93; OR=0,95; 95% CI=0,61-1,48); internal carotid artery (ICA) thrombosis (group 1: 0,05%, n=11; group 2: 0,07%, n=5, p=0,9; OR=0,8; 95% CI=0,28-2,32). In the long-term follow-up, the groups were comparable only in MI incidence: group 1: 0,56%, n=103; group 2: 0,66%, n=45; p=0,37; OR=0,84; 95% CI=0,59-1,19. All other complications were more frequent after conventional CE with patch angioplasty: all-cause death (group 1: 2,7%, n=492; group 2: 9,1%, n=616; p<0,0001; OR=0,27; 95% CI=0,24-0,3); lethal ischemic stroke (group 1: 1,0%, n=180; group 2: 5,5%, n=371; p<0,0001; OR=0,17; 95% CI=0,14-0,21); non-lethal ischemic stroke (group 1: 0,62%, n=114; group 2: 7,0%, n=472; p<0,0001; OR=0,08; 95% CI=0,06-0,1); ICA restenosis >60%, requiring re-revascularization (group 1: 1,6%, n=296; group 2: 12,6%, n=851; p<0,0001; OR=0,11; 95% CI=0,09-0,12). Thus, the composite endpoint (lethal ischemic stroke + non-lethal ischemic stroke + MI) after conventional CE with patch angioplasty was more than 6 times higher than this parameter of eversion CE: group 1: 2,2%, n=397; group 2: 13,2%, n=888; p<0,0001; OR=0,14; 95% CI=0,12-1,16.Conclusion. Conventional CE with patch angioplasty is not prefer for cerebral revascularization in the presence of hemodynamically significant ICA stenosis due to the high prevalence of deaths, stroke, and ICA restenosis in the long-term follow-up