poly (vinylpyrrolidone)-grafted silica as an organic-inorganic hybrid material was used as an effective heterogeneous polymeric cosolvent catalyst in organic reactions. this modified silica catalyzed nucleophilic displacement of alkyl halides for easy preparation of alkyl thiocyanates, alkyl cyanides, alkyl azides and alkyl aryl ethers. furthermore, the catalyst was applied for the conversion o...

Biofunctionality and biocompatibility are essential when tissue or organs supplemented replaced with a polymer based material. Here, we prepared stearyl methacrylate (SM) vinylpyrrolidone (VP) biocompatible SM-x networks self-healing shape memory properties. The mole ratios were gradually changed from hydrophilic to hydrophobic units between 10 90% obtain gels meeting the requirements in variou...

Objectives. The study aimed to investigate the biological activity of C 60 /poly-N-vinylpyrrolidone (C /PVP) complex representing a water-soluble fullerene derivative. In vitro and in vivo techniques were used analyze effect /PVP on lactate dehydrogenase (LDH) evaluate changes biochemical parameters blood serum when per os administered mice. Methods . order determine commercial LDH preparation ...

In this research, Au nanoparticles were successfully synthesized by modified polyol method with commercial precursors to be gold (III) chloride trihydrate (HAuCl4·3H2O), ethylene glycol (EG), poly(vinylpyrrolidone) (PVP), sodium borohydride (NaBH4). The structure and properties of as-prepared have been investigated X ray diffraction (XRD), transmission electron microscopy (TEM), UV-vis-NIR spec...

Healthy cells are required in large numbers to form a tissue-engineered construct and primary cells must therefore be increased in number in a process termed 'expansion'. There are significant problems with existing procedures, including cell injury and an associated loss of phenotype, but three-dimensional culture has been reported to offer a solution. Reversible gels, which allow for the reco...