Self-assembly in systems based on L-cysteine-silver-nitrate aqueous solution: multiscale computer simulation.

We use fully atomistic, quantum mechanics and mesoscopic simulations to investigate multiscale structure formation in a supramolecular system based on aqueous solutions of silver nitrate with L-cysteine (CSS). Fully atomistic modeling reveals that silver mercaptide clusters are formed in solution at the stage of aging, which has a pronounced "core-shell" structure. The core is formed due to the bonding of SAg groups of silver mercaptide (SM) zwitterions while the shell consists of NH and C(O)O groups.

Effect of visible light onto self-assembly in l-cysteine-silver solution.

Effects of irradiation with visible light on the process of self-assembly in an aqueous l-cysteine-silver solution (CSS) and hydrogels based on were investigated using a set of physico-chemical methods. It was found that the exposure to light of CSS and hydrogels based on l-cysteine and silver acetate colors them firstly into yellow and subsequently to brown, which is due to the plasmon resonance of free electrons at the surface of resulting silver nanoparticles (AgNPs). A mechanism involving participation of AgNPs was proposed for the self-assembly in CSS and hydrogel.

L-Cysteine as a reducing/capping/gel-forming agent for the preparation of silver nanoparticle composites with anticancer properties.

The present article reports the preparation of silver nanoparticles (AgNPs) homogeneously distributed in the gel matrix formed using only L-cysteine (CYS) as a bio-reducing agent. The physicochemical methods of analysis confirmed the formation of a gel-network from aggregates consisting of spherical/elliptical cystine-stabilized AgNPs (core) and cysteine/Ag complexes (shell) regardless of the used silver salt - AgNO, AgNO or AgOOCCH. CYS/AgNO and CYS/AgOOCCH aqueous solution systems needed the addition of electrolytes (Cl and SO) for the gelation process, but the gel-formation in CYS/AgNO occurred in one stage without any additional components.

Ag/α-AgMoO/h-MoO nanoparticle based microspheres: synthesis and photosensitive properties.

We report a new and the most simple strategy for the synthesis of silver molybdate functional composite microspheres based on low molecular weight gelators -amino acids, silver salts and heptamolybdate ions. The resulting material shows a high photocatalytic activity with respect to the methylene blue dye degradation at neutral pH.

Hydroxychloroquine in patients with novel coronavirus infection (COVID-19): a case-control study.

Actuality One of the most widely discussed treatments for patients with COVID-19, especially at the beginning of the epidemy, was the use of the antimalarial drug hydroxychloroquine (HCQ). The first small non-randomized trials showed the ability of HCQ and its combination with azithromycin to accelerate the elimination of the virus and ease the acute phase of the disease. Later, large, randomized trials did not confirm it (RECOVERY, SOLIDARITY).