In a physiological environment, nanoparticles selectively absorb proteins to form 'nanoparticle-protein coronas', a process governed by molecular interactions between chemical groups on the nanoparticle surfaces and the amino-acid residues of the proteins. Here, we propose a biological surface adsorption index to characterize these interactions by quantifying the competitive adsorption of a set...

Magnetic modification of microbial cells enables to prepare smart biocomposites in bioremediation. In this study, we constructed an efficient biocomposite by assembling Fe3O4 nanoparticles onto the surface of Sphingomonas sp. XLDN2-5 cells. The average particle size of Fe3O4 nanoparticles was about 20 nm with 45.5 emu g-1 saturation magnetization. The morphology of Sphingomonas sp. XLDN2-5 cell...

Herein, the preparation of neoglycoconjugates bearing mannose-6-phosphate analogues is described by: (a) synthesis of a cyclic sulfate precursor to access the carbohydrate head-group by nucleophilic displacement with an appropriate nucleophile; (b) introduction of spacers on the mannose-6-phosphate analogues via Huisgen's cycloaddition, the Julia reaction, or the thiol-ene reaction under ultras...

Properties porous silica glasses are systemized in this review. Also the methods of formation nanoparticles’ ensembles substances, which useful for microelectronics, described. Porous perspective due to their chemically resistance, mechanical strength and development inner surface. Own electrical resistance is too big glasses’ specimens with standard sizes, that’s why ones use them as matrixes ...

Atmospheric aerosols directly and indirectly affect the radiative balance of the Earth’s atmosphere1. Nanoparticles are a key component of atmospheric aerosols, growing rapidly under ambient conditions2–4. Organic species are thought to lead to the growth of nanoparticles smaller than 20 nm (refs 5, 6), but the identity of these species and the underlying chemical mechanisms remain elusive. Her...

Objective(s): Currently, the development of nanoparticles for the stabilization and targeted delivery of cardiac drugs has gained significance. The present study aimed to develop nontoxic nanoparticles based on chitosan-hyaluronic acid (HA), encapsulate dinitrosyl iron complexes (DNICs, donors NO) into the nanoparticles to increase the stability and effectiveness of their action, and assess the...

Gerbera is one of the most popular cut flowers in the world. Several experiments have been done on the effect of different chemical compounds on longevity and quality of cut flowers. In the present study, two experiments based on a completely random design with two treatments and three replications were conducted on gerbera cut flower cv. Sorbet. The first experiment examined the effect of BA, ...

Various antibacterial fluoroquinolone compounds were prepared by the direct amination of 7-halo-6- fluoroquinolone-3-carboxylic acids with a variety of piperazine derivatives and (4aR,7aR)-octahydro-1H-pyrrolo[3,4-b] pyridine using Zirconia Sulfuric Acid (ZrSA) nanoparticle, as a catalyst in the presence of ordinary or magnetized water upon reflux condition. The results showed that ZrSA exh...

A new synthetic route to mechanochemically produce silicon nanoparticles modified with biocompatible and chromophoric molecular compounds using the Williamson ether synthesis is described. This reaction allows a direct grafting of organic compounds such as phenol, hydroquinone and tetraethylene glycol to the silicon nanoparticle surface in an efficient fashion. Specifically, the formation of (p...

Escherichia coli was one of the bacteria that causes diarrhea. Matoa leaves (Pometia pinnata J.R. Forst & G. Forst) ) is a plant from Sapindaceae family and known to have antibacterial compounds. This study aims make ethanol extract matoa into nanoparticles determine activity better than against E. bacteria.
 research conducted experimentally with free variables, namely concentration l...