Membrane contactor using amine based absorbents is an efficient technology for CO2 separation from gaseous mixtures. A novel porous polysulfone (PSF) flat membrane was prepared via non-solvent phase inversion method. The PSF membrane was modified by adding polyvinyl pyrrolidone (PVP) to the dope solution. The fabricated membrane was used in the serpentine flow field contactor module for CO2 abs...

We studied the effect of titanium dioxide (TiO2)nanoparticles (NPs)on ion conductivity Na+ ion-conducting nanocomposite solid polymer electrolyte (NCSPE) composed polymers poly(ethylene oxide) (PEO) and polyvinyl pyrrolidone (PVP), sodium metaperiodate (NaIO4)at concentration 10 wt%, with added TiO2NPs average size ∼ nm at from 1 wt% to 5 wt%. The electrical response thin films (150μm) PEO/PVP/...

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 ...

Using a programmable mixing pump, light scattering flow chamber, refractive index detector, and single capillary viscometer, the batch (unfractionated) characterization of polymers in solution has been automated. Three different schemes to produce polymer concentration gradients were used, and values for weight average mass Mw, root mean square radius of gyration ^S & , second virial coefficien...

It is recognized that chlorin e6-polyvinylpyrrolidone (Ce6-PVP) formulations are characterized by a high efficacy in photodynamic therapy of malignant tumors. Currently, a commercially available formulation of this type is Photolon (Fotolon) with Ce6:PVP=1:1 (w/w) and the weight-average molecular weight of PVP is 1.2x10(4). To gain a better understanding of the role played by PVP in Ce6-PVP for...

The irreversible adsorption of polyvinylpyrrolidone (PVP) on a series of well-defined platinum single crystal electrode surfaces has been investigated using voltammetry, ex situ XPS and DFT calculations. It is found that the adsorption of PVP is highly structure sensitive with strong adsorption exhibited by step and {100} terrace sites with only weak interactions observed between PVP and Pt{111...

Abstract Electrospinning is a well-known and straightforward technique for creating nanofibres from various materials, such as metals, ceramics, polymers. The process takes place in strong electric field, causing the polymer solution to stretch, resulting micro/nanoscale fibres. parameters of electrospinning influence morphology nanofibres. In present study, zinc oxide (ZnO) were created polyvi...

As synthesized surface active ionic liquids (SAILs), Tetrapropylammonium Dodecylsulfate (TPADS), and Tetrabutylammonium (TBADS) have been characterized by FTIR, 1H-NMR 13C-NMR spectroscopic techniques. Conductometric UV-Visible probe investigations attempted to study the aggregation behavior of these SAILs in aqueous solution polymers Polyvinylpyrrolidone (PVP) Polyethylene glycol (PEG) at diff...

Polydimethyl siloxane (PDMS)–glass microchip has a very strong surface effect on polymerase chain reaction (PCR), leading to a very poor PCR yield. In the work reported here, practical dynamic passivation of surfaces of PDMS–glass microchip using polyethylene glycol (PEG) or polyvinylpyrrolidone (PVP) was achieved using a conventional thermocycler. The passivation procedure was cost-effective a...

It is widely believed that the swimming speed, v, of many flagellated bacteria is a nonmonotonic function of the concentration, c, of high-molecular-weight linear polymers in aqueous solution, showing peaked v(c) curves. Pores in the polymer solution were suggested as the explanation. Quantifying this picture led to a theory that predicted peaked v(c) curves. Using high-throughput methods for c...