Results 271 to 280 of about 66,269 (304)
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Retention of modified BSA by ultrafiltration membranes
Journal of Chemical Technology & Biotechnology, 2014AbstractBACKGROUNDThe efficiency of protein purification depends on membrane pore size and electrostatic repulsion between a protein and membrane surface. The current study investigates how deliberate protein modification affects the electrostatic repulsion, degree of protein separation and transmembrane flux.RESULTSThe experiments were performed with ...
Inna Levitsky +3 more
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Novel modified PVDF ultrafiltration flat-sheet membranes
Journal of Membrane Science, 2012Abstract Polyvinylidene fluoride (PVDF) ultrafiltration membranes were modified using a new type of hydrophilic polyurethane additive, called L2MM. During phase inversion L2MM migrates to the membrane surface and functions as both a pore former and surface modifier.
N. Pezeshk +3 more
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Polyamide ultrafiltration membranes modified with nanocarbon additives
Russian Journal of Applied Chemistry, 2008Possibility of modification of polyphenyleneisophthalamide with 5 wt % nanocarbon additive (fullerene, astralene, or graphite soot) was studied. The resulting composites were used to prepare asymmetric membranes, and the effect of carbon additives on the performance of these membranes was examined.
G. A. Polotskaya +4 more
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Modified ultrafiltration after cardiopulmonary bypass in pediatric cardiac surgery
The Annals of Thoracic Surgery, 1997Cardiopulmonary bypass in children results in considerable water retention, especially in neonates and small infants. Dilution of plasma proteins increases water loss into the extravascular compartments. Excessive total body water may prolong ventilatory support and may contribute to a prolongation of intensive care convalescence. After discontinuation
A M, Draaisma +5 more
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Desalination, 2006
Poly(phenylene oxide) (PPO) membranes with sulfonic groups were prepared by two methods: plasma-initiated surface grafting of sodium styrenesulfonate or chemical sulfonation (with chlorosulfonic acid) of PPO, followed by membrane preparation from the modified material.
Gryzelda Poźniak +2 more
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Poly(phenylene oxide) (PPO) membranes with sulfonic groups were prepared by two methods: plasma-initiated surface grafting of sodium styrenesulfonate or chemical sulfonation (with chlorosulfonic acid) of PPO, followed by membrane preparation from the modified material.
Gryzelda Poźniak +2 more
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Indian Journal of Thoracic and Cardiovascular Surgery, 2007
Today’s practice of cardiac surgery encounters an increasing number of older and/or sicker patients, who are expected to have higher morbidity and mortality. Ultrafiltration during cardiac surgery is one of the strategies to prevent major vital organ dysfunction associated with cardiopulmonary bypass (CPB) and therefore might reduce the morbidity and ...
Tapan Kumar Sahoo +4 more
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Today’s practice of cardiac surgery encounters an increasing number of older and/or sicker patients, who are expected to have higher morbidity and mortality. Ultrafiltration during cardiac surgery is one of the strategies to prevent major vital organ dysfunction associated with cardiopulmonary bypass (CPB) and therefore might reduce the morbidity and ...
Tapan Kumar Sahoo +4 more
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Separation of isomers by ultrafiltration using modified cyclodextrins
Separation and Purification Technology, 2000Abstract In order to improve selective inclusion of cyclodextrin (CD) and permeate flux, separation of structural isomers ( o -, m - and p -nitrophenols) and optical isomers ( d - and l -phenylalanines) were conducted using some modified α and β-CDs, glucosyl (G1)-, maltosyl (G2)-, hydroxy-propyl (HP)-, α- and β-CDs, according to the previously ...
Arif Yudiarto +2 more
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Chemically Modified Ultrafiltration Membranes for Enzyme Fixation
1996Ultrafiltration is a widely used and well established separation process in which asymmetric porous membranes are commonly applied. Many a textbook is listing the wide array of different applications in various branches of industry and gives extensive advice on membrane preparation and on the pros and cons of the various membrane polymers (Cheryan ...
Ulrike Artelt, Eberhard Staude
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Properties of polyethersulfone ultrafiltration membranes modified by polyelectrolytes
Desalination, 2010This study reports on the surface modification of ultrafiltration membranes using the layer-by-layer (LbL) technique. The novelty of this work resides in the LbL assembly of charged polyelectrolytes by electrostatic adsorption directly onto the ultrafiltration membranes without any prior treatment of the surface.
Jozef Kochan +3 more
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Effects of Cardiopulmonary Bypass and Use of Modified Ultrafiltration
The Annals of Thoracic Surgery, 1998Hemodilution is a prominent problem in cardiopulmonary bypass in a pediatric population. Ultrafiltration is a method used to reduce fluid volume and tissue edema and to increase hematocrit without the need for blood products. Modified ultrafiltration may offer advantages in comparison with conventional ultrafiltration.This article reviews the technique
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