J. Inst. Brew. 111(1), 20–25, 2005 Proanthocyanidins have been characterized and levels compared in an ale and a lager using normal-phase liquid chromatography– mass spectroscopy (LC/MS) after a pre-concentration step employing Sephadex LH-20 chromatography. Twenty proanthocyanidins were identified including both non-galloylated and galloylated forms of the monomers, dimers and trimers. Oligome...

Ultra-small Fe(3)O(4) nanoparticles were prepared by using the coprecipitation method, in which the polyvinylpyrrolidone (PVP) serves as a stabilizer. The nanoparticles were characterized by means of X-ray diffraction (XRD), transmission electron microscopy (TEM), infra spectrum (IR), X-ray photoelectron spectroscopy (XPS) and in vivo magnetic resonance imaging (MRI) test. The results showed th...

Because the treatment of oily wastewater, generated from many industrial processes, has become an increasing environmental concern, the search continues for simple, inexpensive, eco-friendly, and readily scalable processes for fabricating novel materials capable of effective oil/water separation. In this study we prepared an eco-friendly superhydrophilic and underwater superoleophobic polyvinyl...

Polymers are materials composed of macromolecules characterized by duplicates smaller molecules that covalently bonded together to provide a set properties. Corrosion inhibition such compounds is usually attributed their adsorption on the metal-solution interface. The effect different sizes polyvinylpyrrolidone (PVP) corrosion carbon steel (C-steel) in solutions perchloric acid was investigated...

Surface enhanced Raman spectroscopy (SERS) and confocal microscopy are applied to investigate the structure molecular arrangement of sub-micron furosemide polyvinylpyrrolidone (furosemide/PVP) particles produced by spray flash evaporation (SFE). Morphology, size crystallinity furosemide/PVP analyzed scanning electron (SEM) X-ray powder diffraction (XRPD). Far-field spectra far-field maps interp...

In this work, we report synthesis and characterization of copper nanoparticles in polymer matrix by wet-chemical reduction method using ascorbic acid as reducing agent, copper (II) sulfate as metal precursor and polyvinylpyrrolidone k-30 (PVP K-30) as surfactant agent. The reaction was carried out in a high-speed stirring mixture at room temperature under nitrogen atmosphere. Characterization o...

The present study concentrates on the synthesis of Au nanoparticles (AuNPs) using aqueous solution of Polyvinylpyrrolidone (PVP) and tetrachloroaurate by different methods as thermal, sonochemical and electrochemical reduction. The PVP has been used as a reducing agent and acts as a stabilizer for Au nano particles that obtained as principal product. In all synthesis procedures, the active radi...

the aim of this study was to investigate the processing methods of sorghum grain and diet formulation on performance and nutrients digestibility in broilers. three hundred and twenty chicks at eight day of age were allotted into eight groups of four replicate with ten chicks per replicate. this research was conducted as completely randomized design arranged in a 2 × 2 × 2 factorial experiment u...

Porous carbon nano/microfibres (PCFs) modified by NiCoP nanoparticles (NiCoP/CF) were tested as gas diffusion cathodes in a zero-gap alkaline water electrolyser. Two types of precursors used for the preparation fibres needle-less spinning: polyacrylonitrile (PAN) and combination PAN polyvinylpyrrolidone (PVP). The influence selected on morphology, porosity, surface area was examined. Both sampl...

Silver (Ag) nanoparticles were successfully prepared by using the in-liquid pulsed plasma technique. This method is based on a low voltage, spark discharge in dielectric liquid. We explore effect of protecting ligands, specifically Cetyl Trimethylammonium Bromide (CTAB), Polyvinylpyrrolidone (PVP), and Sodium n-Dodecyl Sulphate (SDS), used as surfactant materials to prevent nanoparticle aggrega...