Changes in the electrical and viscoelastic parameters of erythrocytes in patients with manifestations of metabolic syndrome, COVID-19 convalescents, when exposed to citicoline in an in vitro experiment

Aim. To study changes in the electrical and viscoelastic parameters of erythrocytes using the method of dielectrophoresis in patients with manifestations of the metabolic syndrome who underwent COVID-19, when exposed to the drug citicoline in an in vitro experiment to reduce the severity of microcirculatory disorders. Materials and methods. 31 men were examined with manifestations of metabolic syndrome (50.6±9.9 years), COVID-19 convalescences, within 8 to 12 months after the disease, the diagnosis was confirmed by PCR, ELISA. The electrical and viscoelastic parameters of erythrocytes were studied by dielectrophoresis twice: the initial levels of indicators were determined and after 30 minutes of exposure with after 30 minutes of exposure to a solution of the drug Ronocyte (oral solution with the active substance citicoline sodium – 104.50 mg., which is equivalent to 100.00 mg citicoline at a concentration of 0.01 µl per 0.3 µl of red blood cell suspension in 0.3M sucrose solution (pH 7.36). Results. Exposure of erythrocyte suspension of patients with Ronocyte solution led to change in the levels of electrical, viscoelastic parameters: an increase in the average cell diameter (p=0.0003), the proportion of discocytes (p=0.0004), the amplitude of cell deformation at high frequencies of the electric field (p=0.000002), cell capacity (p=0.000007), the velocity of erythrocytes to the electrodes (p=0.003), dipole moment (p=0.002), polarizability at 106 and 0.5×106 Hz (p=0.000019 and p=0.0015, respectively), relative polarizability (p0.05) and, conversely, to reduce summarized rigidity (p=0.000003), viscosity (p=0.000002), electrical conductivity (p0.000001), aggregation indices (p=0.00003), destruction at frequencies of 106 Hz (p=0.003), 0.5x106 Hz (p=0.00002), 0.1×106 Hz (p0.00001), polarizability at low frequencies of the electric field (p=0.02). Under the influence of the drug, the equilibrium frequency of erythrocytes shifted to the low-frequency range compared to the initial values (p0.0000001). The revealed changes indicate an increase in the surface charge of erythrocytes, their ability to deform, and cell resistance under the action of citicoline. Conclusion. For the first time, the effect of the drug with the active substance citicoline, improving the rheological properties of erythrocytes, was discovered. Preparations with the active substance - citicoline should be considered promising for conducting a full-fledged clinical study to study the reduction of circulatory disorders at the microcirculatory level in patients with manifestations of metabolic syndrome who have undergone COVID-19 coronavirus infection

[Analysis of changes in broiler microbiome biodiversity parameters due to intake of glyphosate and probiotic Bacillus sp. Gl-8 using next-generation sequencing] Анализ изменений параметров биоразнообразия микробиома бройлеров в результате приема глифосата и пробиотика Bacillus Sp. Gl-8 с использованием секвенирования следующего поколения

In recent years, there have been more data that the nonselective herbicide glyphosate (GLY) can negatively impact gut bacterial communities. The aim of our study was to investigate the composition of broiler caecal microbiome under chronic exposure to GLY and the introduction of a probiotic microorganism strain into the diet. 120 broilers were divided into three groups: Group 1 of control birds fed the basic diet (BD); Group 2 of experimental birds fed BD supplemented with GLY; and Group 3 of experimental birds fed BD supplemented with GLY and a probiotic strain of the microorganism Bacillus sp. GL-8. For analysis, we used the next-generation sequencing (NGS) technique. Due to the GLY administration, there was a trend of lowering the biodiversity of normal microflora representatives, along with intestinal colonization by undesirable forms of microorganisms. In particular, when adding GLY (Group 2), we observed a decreased number of Tepidimicrobium representatives (0.001 ±0.00006%) that ferment indigestible polysaccharides, while in Group 1 their content was greater (0.3 ± 0.02%; P ≤ 0.05). In Group 3 with probiotic, there was a lower number of Firmicutes (by 16.7%) and a rise in the number of Bacteroidetes (by 19.1%) as compared to Group 2 (P ≤ 0.05). В последние годы появилось больше данных о том, что неселективный гербицид глифосат (GLY) может негативно влиять на бактериальные сообщества кишечника. Целью нашего исследования было изучение состава микробиома слепой кишки бройлеров при хроническом воздействии GLY и введении в рацион пробиотического штамма микроорганизмов. 120 бройлеров были разделены на три группы: 1 группа – контрольная птица, получавшая основной рацион (BD); 2-я группа опытных птиц, получавших BD с добавлением GLY; 3-я группа опытных птиц, получавших BD с добавлением GLY и пробиотического штамма микроорганизма Bacillus sp. GL-8. Для анализа использован метод секвенирования следующего поколения (NGS). При введении GLY отмечена тенденция к снижению биоразнообразия представителей нормальной микрофлоры, наряду с колонизацией кишечника нежелательными формами микроорганизмов. В частности, при добавлении GLY (2-я группа) наблюдалось снижение количества представителей Tepidimicrobium (0,001±0,00006%), ферментирующих неперевариваемые полисахариды, тогда как в 1-й группе их содержание было больше (0,3±0,02%; P ≤ 0,05). В 3-й группе с пробитиком отмечено меньшее количество Firmicutes (на 16,7%) и увеличение количества Bacteroidetes (на 19,1%) по сравнению со 2-й группой (P ≤ 0,05). Russian authors' names: Георгий Лаптев, Дарья Тюрина, Елена Йылдырым, Лариса Ильина, Ксения Калиткина, ООО «БИОТРОФ+», Санкт-Петербургский государственный аграрный университет (ФГБОУ ВО СПбГАУ), Санкт-Петербург, Россия. Елена Горфинкель, Валентина Филиппова, Андрей Дубровин, Вероника Меликиди, Наталья Новикова, Виталий Молотков, Екатерина Пономарева, ООО «БИОТРОФ», Санкт-Петербург, Россия. Дмитрий Громов, Санкт-Петербургский государственный аграрный университет (ФГБОУ ВО СПбГАУ), Санкт-Петербург, Россия. Михаил Романов, Кентский университет, Великобритания. (Третья международная конференция "Цифровизация сельского хозяйства и органическое производство ADOP 2023": Программа конференции и тезисы, 5–7 июня 2023 года г., Санкт-Петербург, Россия

The population history of northeastern Siberia since the Pleistocene.

Northeastern Siberia has been inhabited by humans for more than 40,000 years but its deep population history remains poorly understood. Here we investigate the late Pleistocene population history of northeastern Siberia through analyses of 34 newly recovered ancient genomes that date to between 31,000 and 600 years ago. We document complex population dynamics during this period, including at least three major migration events: an initial peopling by a previously unknown Palaeolithic population of 'Ancient North Siberians' who are distantly related to early West Eurasian hunter-gatherers; the arrival of East Asian-related peoples, which gave rise to 'Ancient Palaeo-Siberians' who are closely related to contemporary communities from far-northeastern Siberia (such as the Koryaks), as well as Native Americans; and a Holocene migration of other East Asian-related peoples, who we name 'Neo-Siberians', and from whom many contemporary Siberians are descended. Each of these population expansions largely replaced the earlier inhabitants, and ultimately generated the mosaic genetic make-up of contemporary peoples who inhabit a vast area across northern Eurasia and the Americas

Potential of Core-Collapse Supernova Neutrino Detection at JUNO

JUNO is an underground neutrino observatory under construction in Jiangmen, China. It uses 20kton liquid scintillator as target, which enables it to detect supernova burst neutrinos of a large statistics for the next galactic core-collapse supernova (CCSN) and also pre-supernova neutrinos from the nearby CCSN progenitors. All flavors of supernova burst neutrinos can be detected by JUNO via several interaction channels, including inverse beta decay, elastic scattering on electron and proton, interactions on C12 nuclei, etc. This retains the possibility for JUNO to reconstruct the energy spectra of supernova burst neutrinos of all flavors. The real time monitoring systems based on FPGA and DAQ are under development in JUNO, which allow prompt alert and trigger-less data acquisition of CCSN events. The alert performances of both monitoring systems have been thoroughly studied using simulations. Moreover, once a CCSN is tagged, the system can give fast characterizations, such as directionality and light curve

Detection of the Diffuse Supernova Neutrino Background with JUNO

As an underground multi-purpose neutrino detector with 20 kton liquid scintillator, Jiangmen Underground Neutrino Observatory (JUNO) is competitive with and complementary to the water-Cherenkov detectors on the search for the diffuse supernova neutrino background (DSNB). Typical supernova models predict 2-4 events per year within the optimal observation window in the JUNO detector. The dominant background is from the neutral-current (NC) interaction of atmospheric neutrinos with 12C nuclei, which surpasses the DSNB by more than one order of magnitude. We evaluated the systematic uncertainty of NC background from the spread of a variety of data-driven models and further developed a method to determine NC background within 15\% with {\it{in}} {\it{situ}} measurements after ten years of running. Besides, the NC-like backgrounds can be effectively suppressed by the intrinsic pulse-shape discrimination (PSD) capabilities of liquid scintillators. In this talk, I will present in detail the improvements on NC background uncertainty evaluation, PSD discriminator development, and finally, the potential of DSNB sensitivity in JUNO

Direct grafting of carbon nanotubes with ethylenediamine

Singlewall and multiwall carbon nanotubes were covalently functionalised with ethylenediamine (EDA) in a simple one-pot process providing a good surface coverage. The successful grafting of EDA on carbon nanotubes (CNTs) was shown by X-ray photoelectron spectroscopy (XPS), infrared and Raman spectroscopies and thermogravimetric analysis (TGA). These functionalised CNTs with terminal amino groups were shown to form composite polyamide materials with uniform CNT distribution in the polymer matrix

Compressively-strained GaSb nanowires with core-shell heterostructures

GaSb-based nanowires in a gate-all-around geometry are good candidates for binary p-type transistors, however they require the introduction of compressive strain to enhance the transport properties. Here, we for the first time demonstrate epitaxial GaSb-GaAsxSb1−x core-shell nanowires with a compressively strained core. Both axial and hydrostatic strain in GaSb core have been measured by X-ray diffraction (XRD) and Raman scattering, respectively. The optimal sample, almost without plastic relaxation, has an axial strain of −0.88% and a hydrostatic strain of −1.46%, leading to a noticeable effect where the light hole band is calculated to be 33.4 meV above the heavy hole band at the Γ-point. This valence band feature offers more light holes to contribute the transport process, and thus may provide enhanced hole mobility by reducing both the interband scattering and the hole effective mass. Our results show that lattice-mismatched epitaxial core-shell heterostructures of high quality can also be realized in the promising yet demanding GaSb-based system. [Figure not available: see fulltext.]

Analysis of changes in broiler microbiome biodiversity parameters due to intake of glyphosate and probiotic Bacillus sp. GL-8 using next generation sequencing

In recent years, there have been more data that the nonselective herbicide glyphosate (GLY) can negatively impact gut bacterial communities. The aim of our study was to investigate the composition of broiler caecal microbiome under chronic exposure to GLY and the introduction of a probiotic microorganism strain into the diet. 120 broilers were divided into three groups: Group 1 of control birds fed the basic diet (BD); Group 2 of experimental birds fed BD supplemented with GLY; and Group 3 of experimental birds fed BD supplemented with GLY and a probiotic strain of the microorganism Bacillus sp. GL-8. For analysis, we used the next-generation sequencing (NGS) technique. Due to the GLY administration, there was a trend of lowering the biodiversity of normal microflora representatives, along with intestinal colonization by undesirable forms of microorganisms. In particular, when adding GLY (Group 2), we observed a decreased number of Tepidimicrobium representatives (0.001 ±0.00006%) that ferment indigestible polysaccharides, while in Group 1 their content was greater (0.3 ± 0.02%; P ≤ 0.05). In Group 3 with probiotic, there was a lower number of Firmicutes (by 16.7%) and a rise in the number of Bacteroidetes (by 19.1%) as compared to Group 2 (P ≤ 0.05)

Temperature- and pH-Dependent Shattering: Insoluble Fatty Ammonium Phosphate Films at Water–Oil Interfaces

We study the films formed by tetradecylamine (TDA) at the water–dodecane interface in the presence of hydrogen phosphate ions. Using Fourier transform infrared spectroscopy (FTIR), interfacial shear rheology, confocal fluorescence microscopy, cryo-scanning electron microscopy (cryo-SEM), and small-angle neutron scattering (SANS), we find that between pH 5 and 8 tetradecylammonium cations bind to hydrogen phosphate anions to form needle-shaped crystallites of tetradecylammonium hydrogen phosphate (TAHP). These crystallites self-assemble into films with a range of morphologies; below pH 7, they form brittle, continuous sheets, and at pH 8, they form lace-like networks that deform plastically under shear. They are also temperature-responsive: when the system is heated, the film thins and its rheological moduli drop. We find that the temperature response is caused by dissolution of the film in to the bulk fluid phases. Finally, we show that these films can be used to stabilize temperature-responsive water-in-oil emulsions with potential applications in controlled release of active molecules

The population history of northeastern Siberia since the Pleistocene.

Northeastern Siberia has been inhabited by humans for more than 40,000 years but its deep population history remains poorly understood. Here we investigate the late Pleistocene population history of northeastern Siberia through analyses of 34 newly recovered ancient genomes that date to between 31,000 and 600 years ago. We document complex population dynamics during this period, including at least three major migration events: an initial peopling by a previously unknown Palaeolithic population of 'Ancient North Siberians' who are distantly related to early West Eurasian hunter-gatherers; the arrival of East Asian-related peoples, which gave rise to 'Ancient Palaeo-Siberians' who are closely related to contemporary communities from far-northeastern Siberia (such as the Koryaks), as well as Native Americans; and a Holocene migration of other East Asian-related peoples, who we name 'Neo-Siberians', and from whom many contemporary Siberians are descended. Each of these population expansions largely replaced the earlier inhabitants, and ultimately generated the mosaic genetic make-up of contemporary peoples who inhabit a vast area across northern Eurasia and the Americas