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  • 1985-1989  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Xylanase production in solid-state fermentation: a study of its properties (1985)
    Springer
    Applied microbiology and biotechnology 22 (1985), S. 177-180 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00253605
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Cellulase production by trichoderma harzianum in static and mixed solid-state fermentation reactors under nonaseptic conditions (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 27 (1985), S. 1385-1388 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: 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.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260270917
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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