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Titolo:
Ultrafiltration of mixed protein solutions of lysozyme and lactoferrin: role of modified inorganic membranes and ionic strength on the selectivity
Autore:
Rabiller-Baudry, M; Chaufer, B; Lucas, D; Michel, F;
Indirizzi:
Univ Rennes 1, Lab Proc Separat, F-35042 Rennes, France Univ Rennes 1 Rennes France F-35042 Proc Separat, F-35042 Rennes, France INRA, Rech Technol Laitiere Lab, F-35042 Rennes, France INRA Rennes France F-35042 Technol Laitiere Lab, F-35042 Rennes, France
Titolo Testata:
JOURNAL OF MEMBRANE SCIENCE
fascicolo: 1, volume: 184, anno: 2001,
pagine: 137 - 148
SICI:
0376-7388(20010315)184:1<137:UOMPSO>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHYSICOCHEMICAL ENVIRONMENT; SEPARATION; FRACTIONATION; FILTRATION; MODEL; PH; EXTRACTION; FLUX;
Keywords:
selectivity; modified charged membrane; ionic strength; protein; lysozyme; lactoferrin;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Rabiller-Baudry, M Univ Rennes 1, Lab Proc Separat, 1-USC 991 INRA,Campus Beaulieu,Bat 10 A,263 Ave G, F-35042 Rennes, France Univ Rennes 1 1-USC 991INRA,Campus Beaulieu,Bat 10 A,263 Ave G Rennes France F-35042
Citazione:
M. Rabiller-Baudry et al., "Ultrafiltration of mixed protein solutions of lysozyme and lactoferrin: role of modified inorganic membranes and ionic strength on the selectivity", J MEMBR SCI, 184(1), 2001, pp. 137-148

Abstract

Ultrafiltration of either single protein solutions (lysozyme 14,300 g mol(-1), pI = 11: lactoferrin 80,000 g mol(-1), pI = 8-9) or mixed protein solution was performed with inorganic membranes (MMCO 300.000 g mol(-1),pore radius 14 nm) chemically modified in order to bear either pyrophosphate (PP, anionic) or ethylenediamine (EDA, cationic) groups. The electrophoretic mobility of modified and unmodified zirconia particlesfouled with proteins was similar whatever the grafted groups, meaning thatthe membrane surface was always made of adsorbed proteins during UF In spits of that, for the UF of lysozyme/lactoferrin mixed solution. the maximum selectivity (S = lysozyme transmission/lactoferrin transmission = 165) was observed with the EDA membrane and allowed an instantaneous purity of lysozyme in the permeate close to 100% to be achieved. Such high selectivity wasmainly due to the negligible transmission of lactoferrin with the membranemodified with the EDA groups in the ionic strength range 0-100 mmol l(-1) of NaCl at pH 7 (achieved either for mixed and single solutions). (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/01/21 alle ore 22:23:43