The paper describes a method of extracting the aerosol scattering phase function from absolute scattering phase function of brightness, measured in the solar almucantar in the total absence of clouds ...in the sky. The method is tested on archive observation data, obtained in the semiarid region in southeast Kazakhstan in the visible spectral range. We present the calculations of the directional aerosol scattering coefficients and the corresponding typical aerosol particle size distribution functions. It is shown that these functions are similar to the data from the Solar Village site (Saudi Arabia) of Baseline Surface Radiation Network.
Carpet is an air-shower array at Baksan, Russia, equipped with a large-area muon detector, which makes it possible to separate primary photons from hadrons. We report first results of the search for ...primary photons with energies E>100 TeV. The experiment's ongoing upgrade and future sensitivity are also discussed.
was to identify new anatomical landmarks of the aortic root and the relationship between the sizes of anatomical structures using the method of computed tomography angiography to improve models of ...heart valves and the methods for their selection in clinical practice.
The dataset of computed tomography angiography prior to aortic valve replacement in 262 patients was analyzed. The mean age was 75.0±5.9 years. 99 (37.8±3.0%) men and 163 (62.2±3.0%) women took part in the study. The annulus fibrosus, sinotubular junction, and height of the sinuses of Valsalva were measured.
In the tricuspid aortic valve group (n=251), in more than 50% of the cases, the diameter of the annulus fibrosus ranged from 23 to 26 mm. No significant association between the diameter of the annulus fibrosus and patient height (r=0.35; p=0.01) or body surface area (r=0.25; p=0.01) and the height of the sinuses of Valsalva (r=0.34; p=0.01) were revealed. Based on the ratio of the height of the sinuses of Valsalva and the diameter of the annulus fibrosus, three variants of the structure of the aortic root were identified: type A -
>1.05; type B- 0.95≤
≤1.05; type C-
<0.95. Type C of the aortic root was found to predominate in most cases, namely, in 98.0±0.9% (n=246).In the bicuspid aortic valve group (n=11), 2 patients had a type A of the aortic root, 1 patient had a type B, and 8 patients had a type C.
A classification of variants of the aortic root structure has been proposed, which will be useful not only for practitioners when choosing a treatment method, but also for researchers to understand the structural characteristics of the aortic root in patients with its pathology.
Six new polyketides acrucipentyns A-F (
-
) were isolated from the alga-derived fungus
KMM 4696. Their structures were established based on spectroscopic methods. The absolute configurations of ...acrucipentyn A was assigned by the modified Mosher's method and ROESY data analysis. Acrucipentyns A-E were identified to be the very first examples of chlorine-containing asperpentyn-like compounds. The cytotoxic and antimicrobial activities of the isolated compounds were examined. Acrucipentyns A-F were found as antimicrobial agents, which inhibited sortase A enzyme activity, bacterial growth and biofilm formation of
and decreased LDH release from human keratinocytes HaCaT in
skin infection in an in vitro model.
The results of an experimental study of different factors influencing the strength of metal-glass seals are presented. The obtained results are of interest in the fabrication of different hermetic ...relays and devices and explain the possible reasons for the seal failure of devices.
The electrophysical characteristics of experimental types of electrical insulating paper modified by bacterial cellulose made of nano-gel film Komagataeibacter xylinus, disintegrated in various ways, ...were studied. The advantage of composites over traditional electrical insulating paper made of pine cellulose is shown in terms of electrical and mechanical strength, sorption activity and heat resistance. The efficiency of using an industrial blender to grind bacterial cellulose has been confirmed, which significantly reduces the time of its high-quality grinding.
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