Publications by authors named "A A Vinogradov"
In this work, a set of analytical techniques, including scanning electron microscopy (SEM), Raman scattering spectroscopy, X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray microanalysis (EDX) and cyclic voltammetry (CV), were used to study the impact of high-energy He ion irradiation on the structural and electrochemical characteristics of sulfur-containing multi-walled carbon nanotubes (S-MWCNTs) placed on a titanium substrate. The results indicate that the ion beam treatment of the S-MWCNT system led to an increase in the level of imperfections on the surface structures of the nanotubes due to the formation of point defects on their outer walls and the appearance of oxygen-containing functional groups, including SO groups, near these defects. At the same time, a significant increase in the sulfur concentration (by 6.
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- The study investigated the presence of anti-podocyte antibodies, specifically targeting synaptopodin and annexin 1, in patients with nephrotic syndrome to evaluate their role in diagnosing primary podocytopathies like Minimal Change Disease (MCD) and Focal Segmental Glomerulosclerosis (FSGS).
- A total of 72 nephrotic syndrome patients were analyzed, alongside 21 healthy individuals, finding higher antibody levels in MCD and FSGS patients compared to the others, indicating their potential use in diagnosis.
- The combined analysis of both antibody types showed significant diagnostic accuracy (sensitivity of 80.9% and specificity of 81.3%), although these antibody levels did not predict how well patients
Stereoselective reduction of dehydroamino acids is a common biosynthetic strategy to introduce d-amino acids into peptidic natural products. The reduction, often observed during the biosynthesis of lanthipeptides, is performed by dedicated dehydroamino acid reductases (dhAARs). Enzymes from the three known dhAAR families utilize nicotinamide, flavin, or FH coenzymes as hydride donors, and little is known about the catalysis performed by the latter family proteins.
View Article and Find Full Text PDFThere is a demand for site-selective peptide/protein conjugation chemistry that is fully reversible in a stimulus-responsive manner. The contemporary methods for site-selective protein modification enable the preparation of homogeneous protein-small molecule conjugates, which are indispensable for drug delivery and chemical biology purposes, but such chemistries are usually irreversible. In contrast, the existing reversible protein labeling techniques are generally not site-selective.
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- The Letter reports the most accurate measurement so far of the matter-antimatter imbalance during Pb-Pb collisions at a high energy level of 5.02 TeV.
- It utilizes the Statistical Hadronization framework to determine precise values for the electric charge and baryon chemical potentials, μ_{Q} and μ_{B}.
- The analysis of antiparticle-to-particle yield ratios shows that the collisions create a system that is generally baryon-free and electrically neutral at midrapidity.