Pressure-driven membrane-based technologies represent a valid approach to reduce the environmental pollution of several agro-food by-products. Recently, in relation to the major interest for natural compounds with biological activities, their use has been also addressed to the recovery, separation and fractionation of phenolic compounds from such by-products. In particular, tight ultrafiltratio...

Internal concentration polarization (ICP) in forward osmosis (FO) process is a characteristic problem for asymmetric thin-film composite (TFC) FO membrane which leads to lower water flux. To mitigate the ICP effect, modification of the substrates' properties has been one of the most effective methods. A new polyethersulfone-based ultrafiltration membrane with increased surface porosity and high...

date juice was treated by cross- flow ultra-filtration with molecular weight cut-off (mwco) of 5 kda. optimized levels of feed brix, tmp and operation time were determined as 47.13, 82.11 psi and 30 min, respectively. under such conditions, 80.94% decolourisation and 97.78 % turbidity reduction were obtained while loss of glucose and fructose were estimated to be only 3.49% and 9.62%, respectiv...

Date juice was treated by cross- flow ultra-filtration with molecular weight cut-off (MWCO) of 5 kDa. Optimized levels of feed brix, TMP and operation time were determined as 47.13, 82.11 psi and 30 min, respectively. Under such conditions, 80.94% decolourisation and 97.78 % turbidity reduction were obtained while loss of glucose and fructose were estimated to be only 3.49% and 9.62%, respectiv...

Date juice was treated by cross- flow ultra-filtration with molecular weight cut-off (MWCO) of 5 kDa. Optimized levels of feed brix, TMP and operation time were determined as 47.13, 82.11 psi and 30 min, respectively. Under such conditions, 80.94% decolourisation and 97.78% turbidity reduction were obtained while loss of glucose and fructose were estimated to be only 3.49% and 9.62%, respective...

Phycobiliproteins have been used as a natural dye, an analytical probe for fluorescence studies, and chemical medicinal use. An ultrafiltration membrane is useful the purification of phycobiliproteins. This study addressed phycobiliprotein-containing solution, extracted from Nostoc commune , which was individually performed by two kinds (MWCO 150 kDa 10 kDa) in cross-flow. Three proteins were m...

Polyphenolics and sugar are the components of many fruit juices. In this work, the performance of ultra-filtration (UF) for separating phenolic compounds from apple juice was studied by performing batch experiments in a membrane module with an area of 0.1 m and fitted with a regenerated cellulose membrane of 1 kDa MWCO. The effects of various operating conditions: transmembrane pressure (3, 4, ...

Ca2+-free calmodulin was obtained by exhaustively dialyzing 2 mg protein (c = 4 mg/mL) against 1000 volumes of 2 mM EGTA, 50 mM Tris HCl and 150 mM NaCl (pH = 7.4) at 4 °C in a 0.5 mL Pierce Slide-A-LyzerTM Dialysis Cassette (3.5 K MWCO) for 2 days. As the carboxylic groups of EGTA exhibit strong IR bands in the region 1570-1630 cm-1 that overlap with the amide I' band of proteins (1600-1700 cm...

The suitability of polysulfone ultrafiltration membranes (UFM) designed for commercial water treatment has been investigated for separation of protein (PR) from sweet whey. Ultrafiltration (UF) of whey originated from dairy has been realized by a self-made pilot plant, which has been in service for about one year. The influence of two whey temperatures (9 and 30 °C) on the efficiency of protein...

The effect of added ethanol and (NH(4))(2)SO(4) on the flux decline index (FDI) of bovine serum albumin (BSA) and a fatty acid-poor derivative (BSA/FAP) was examined. Ternary phase diagrams of the two protein species indicated that the concentration polarization (CP) layer on the surface of a nonadsorbing 10 000 MWCO regenerated cellulose membrane had principally a packed bed structure up to 33...