Synthetic microporous membranes with functional groups covalently attached were used to selectively separate beta-lactoglobulin, BSA, and alpha-lactalbumin from rennet whey. The selectivity and membrane performance of strong (quaternary ammonium) and weak (diethylamine) ion-exchange membranes were studied using breakthrough curves, measurement of binding capacity, and protein composition of the...

The use of cellulose-containing agricultural by-products modified with the cross-linking reagent dimethyloldihydroxyethylene urea (DMDHEU) and the quaternary amine, choline chloride, as anion exchange resins, has not been reported. The objective of the present study was to convert the readily available by-products, soybean hulls, sugarcane bagasse and corn stover to functional anion exchange re...

introduction: perepubertal varicocele can result in hypotrophy of testes, sperm damage and decrease the function of leydig cells in future. pathophysiology of varicocele is unclear. increased reactive oxygen species (ros) is a major theory. there are many controversies in treatment of pediatric varicocele. flaxseed (fs) is the richest source of lignans with antioxidant properties. the aim of th...

nitrate is an anion of major importance particularly in biological areas. excessive amounts in water supplies indicate pollution from sewage or agricultural effluents. the effects of excessive quantities of nitrate in water are well known. in this research structural modification of natural clinoptilolite by isomorphic substitution was performed. isomorphously substituted zeolite was prepared u...

ulatory standard for minimizing potentihealth effects arising from their ingestion in drinking water (5). Other common inorganic anions, such as fluoride, chloride, and sulfate, are considered secondary contaminants and are regulated under the U.S. National Secondary Drinking Water Standards, which are guidelines for taste, color, odor, and certain aesthetic effects (6). Although bromide is not...

When expressed in Xenopus oocytes, the trout red cell anion exchanger tAE1, but not the mouse exchanger mAE1, elicited a transport of electroneutral solutes (sorbitol, urea) in addition to the expected anion exchange activity. Chimeras constructed from mAE1 and tAE1 allowed us to identify the tAE1 domains involved in the induction of these transports. Expression of tAE1 (but not mAE1) is known ...

background: due to the potential public health effects of releases of uranium to the environment, isotopic determination and measurement of this radionuclide in environmental samples is very important. achieving this goal, monitoring programs for this radionuclide seems necessary to be applied in many countries. materials and methods: the uranium was separated from the water samples using anion...

in the current research, polyvinylchloride based mixed matrix heterogeneous anion exchange membranes were prepared by a solution casting technique. titanium dioxide nanoparticles were also utilized as inorganic filler additive in the membrane fabrication. the effect of tio2 nanoparticles concentration in the casting solution on the membrane physico-chemical properties was studied. membrane wate...

Herein, we report on the fabrication of a device for removing cations of an anti-analyte ion contained in a sample and an eluent under an electric field. The space in which the electrode is set on both sides of the device is separated into three cells using anion and cation exchange membranes. Each of the cells is packed with either an anion or cation exchange resin. Cation removal is perfor...