39 The use of immobilized Saccharomyces cerevisiae on radiation crosslinked acrylamide-maleic acid hydrogel carriers for production of ethyl alcohol

Author(s): Saraydin, D; Oztop, HN; Karadag, E; Oztop, AY; Isikver, Y; Guven, O

Title: The use of immobilized Saccharomyces cerevisiae on radiation crosslinked acrylamide-maleic acid hydrogel carriers for production of ethyl alcohol

Source: PROCESS BIOCHEMISTRY, 37 (12): 1351-1357 JUL 2002

Language: English

Document Type: Article

Author Keywords: acrylamide/maleic acid; hydrogel; radiation; immobilization; Saccharomyces cerevisiae; ethyl alcohol

Keywords Plus: YEAST-CELLS; ETHANOL

Abstract: Radiation crosslinked acrylamide/maleic acid (AAm/MA) copolymers were prepared by gamma-irradiation. They were used in experiments on swelling, diffusion, and immobilization of yeast cells (Saccharomyces cerevisiae) for the production of ethyl alcohol. AAm/MA hydrogels containing different amount of MA, irradiated at different doses, were used for swelling and diffusion studies. The parameters of swelling, diffusional exponents, network constants, diffusion coefficients and percent porosity of the hydrogel/penetrant systems were calculated and evaluated. Yeast cells were immobilized on to the hydrogels by adsorption during multiplication, and ethyl alcohol production by the hydrogels was investigated. Swelling of AAm/MA increased with increase in MA content. Ethyl alcohol production also increased with increasing MA in the hydrogels but decreased with an increase of irradiation dose. (C) 2002 Published by Elsevier Science Ltd.

Addresses: Cumhuriyet Univ, Dept Chem, TR-58140 Sivas, Turkey; Adnan Menderes Univ, Dept Chem, TR-09010 Aydin, Turkey; Cumhuriyet Univ, Fac Med, Dept Microbiol Clin Microbiol, TR-58140 Sivas, Turkey; Hacettepe Univ, Dept Chem, TR-06532 Ankara, Turkey

Reprint Address: Oztop, HN, Cumhuriyet Univ, Dept Chem, TR-58140 Sivas, Turkey.

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Cited Reference Count: 17

Times Cited: 1

Publisher: ELSEVIER SCI LTD

Publisher Address: THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND

ISSN: 0032-9592

29-char Source Abbrev.: PROCESS BIOCHEM

ISO Source Abbrev.: Process Biochem.

Source Item Page Count: 7

Subject Category: ENGINEERING, CHEMICAL; BIOCHEMISTRY & MOLECULAR BIOLOGY; BIOTECHNOLOGY & APPLIED MICROBIOLOGY

ISI Document Delivery No.: 562VH