in this work, the interfacial interfacial polymerization (ip) technique was employed using terephthaloyl chloride (tpc) and p-phenylenediamine (ppd), as reactant monomers, to prepare poly(paraphenylene terephthalamide) thin film composite (tfc) nanofiltration on polyethersulphone (pes) support layer. the effects of six different anionic and non-ionic surfactants, in the aqueous phase on the mor...

background and purpose: cadmium is hazardous and non-biodegradable material entering the food chain. in this paper, the removal of cadmium from aqueous solutions by sunflower powder (the natural biosorbent) was investigated. materials and methods: the experiments were performed in a batch system. the effect of parameters such as contact time, ph, cadmium concentration and adsorbent dose were ev...

ferulic acid (4-hydroxy-3-methoxycinnamic acid), an effective component of medical plant, is a phenolic acid with low toxicity that can be absorbed and easily metabolized in the human body. the solubility of ferulic acid (fa) is very low in aqueous solutions which can cause problem in preparation of pharmaceutical products, but it can easily be dissolved in oil/water interface of nano-emulsions...

background: phenylalanine dehydrogenase (phedh ec 1.4.1.20) is a nad+-dependent enzyme that performs the reversible oxidative deamination of l-phenylalanine to phenylpyruvate. it plays an important role in detection and screening of phenylketonuria (pku) diseases and production of chiral intermediates as well. the main goal of this study was to find a simple and rapid alternative method for pur...

aqueous two-phase systems (atps) have  emerged as a powerful extraction method for the downstream processing of bio-molecules. the aim of this work was to investigate the possibility of utilizing atps for the separation of recombinant bacillus sphaericus phenylalanine dehydrogenase (phedh). polyethylene glycol (peg) and ammonium sulfate systems were selected for our experiment. the effect of di...

ger G and Albertsson PA (1983) AfRnity partitioning of phosphofructokinase from baker’s yeast using polymer-bound Cibacron blue F3GA. European Journal of Biochemistry 131: 589}594. KopperschlaK ger G and Birkenmeier G (1990) AfRnity partitioning and extraction of proteins. Bioseparation 1: 235}254. Tjerneld F, Johansson G and Joelsson M (1987) AfRnity liquid}liquid extraction of lactate dehydro...

A reversed-phase salt assisted liquid-liquid extraction (RP-SALLE) method was developed for the preconcentration and determination of trace crocin in herbal medicines by high-performance liquid chromatography (HPLC). In developed method, the roles of the aqueous and organic phases are inverted so that the analyte is extracted from the organic into the aqueous phase after salt addition and phase...