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Digitale Medien

Xylanase production in solid-state fermentation: a study of its properties (1985)

Deschamps, F. ; Huet, M. C.

Springer

Applied microbiology and biotechnology 22 (1985), S. 177-180

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ISSN: 1432-0614

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: Summary Xylanase production by Aspergillus niger van Tieghem was studied in solid-state cultivation. The screening of substrates was carried out in column incubators aerated with humidified air at 30°C. Results of physiological studies showed that the best yield of xylanase was 2500 U/g dry matter on a mixture of straw+bran 1:1 at 70% of moisture content. In order to compare some properties of the xylanase produced in both liquid and solid cultures, A. niger was also grown on xylan in submerged cultures. The enzymes produced in solid and liquid cultures have an optimum pH of about 3.8 and 4.5, respectively. Xylanase synthetized in solid fermentation is a little more thermostable than that from liquid culture and is maximally active at 50° C, compared to 45° C for enzyme from liquid culture.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00253605

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Digitale Medien

Cellulase production by trichoderma harzianum in static and mixed solid-state fermentation reactors under nonaseptic conditions (1985)

Deschamps, F. ; Giuliano, C. ; Asther, M. ; [weitere]

New York, NY [u.a.] : Wiley-Blackwell

Biotechnology and Bioengineering 27 (1985), S. 1385-1388

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ISSN: 0006-3592

Schlagwort(e): Chemistry ; Biochemistry and Biotechnology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: Cellulase production from lignocellulosic materials was studied in solid-state cultivation by both static and mixed techniques under nonaseptic conditions. The effects of fermentation conditions, such as moisture content, pH, temperature, and aeration, on cellulase production by Trichoderma harzianum using a mixture of wheat straw (80%) and bran (20%) were investigated. With a moisture content of 74% and a pH of 5.8., 18 IU filter paper activity and 198 IU endoglucanase activity/g initial substrate content were obtained in 66 h. The extension from static column cultivation to stirred tank reactor of 65 L capacity gave similar yields of cellulase.

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/bit.260270917

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