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  • 1
    Electronic Resource
    Electronic Resource
    Fungal degradation of kraft lignin and lignin sulfonates prepared form synthetic 14C-lignins (1977)
    Springer
    Archives of microbiology 112 (1977), S. 291-296 
    Details
    ISSN: 1432-072X
    Keywords: Lignin biodegradation ; Kraft lignin biodegradation ; Lignin sulfonate biodegradation ; DHP ; White-rot fungi ; Wood decay ; Phanerochaete chrysosporium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Kraft lignins (KL), bleached kraft lignins (BKL), and lignin sulfonates (LS) were prepared from synthetic 14C-lignins labeled in the aromatic nuclei or in the propyl side chains. These and control lignins (CL) were incubated with the lignin-decomposing white-rot fungus, Phanerochaete chrysosporium Burds., in a defined culture medium containing cellulose as growth substrate. Decomposition was monitored by measuring the 14CO2 evolved. Average percentages of the [ring-14C]- and [side chain-14C]-lignins, respectively, recovered as 14CO2 at the cessation of 14CO2 evolution were: KL, 41 and 31; BKL, 42 and 26; LS, 28 and 21; and CL, 26 and 24. Gel permeation chromatography of radiolabeled materials extracted from spent cultures showed that substantial degradation to nonvolatile products had occurred. The polymeric components in the extracts were further degraded in fresh cultures. These results indicate that industrial lignins are significantly bioalterable, and that under favorable conditions industrial lignins are substantially biodegradable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00413095
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Ligninolytic system of Phanerochaete chrysosporium: Inhibition by o-Phthalate (1979)
    Springer
    Archives of microbiology 123 (1979), S. 307-309 
    Details
    ISSN: 1432-072X
    Keywords: 2,2-Dimethylsuccinate ; o-Phthalate ; Buffer ; Inhibition ; Lignin biodegradation ; Phanerochaete chrysosporium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The degradation rate of [synthetic-14C]-lignin to 14CO2 by Phanerochaete chrysosporium in cultures buffered with 0.01 M 2,2-dimethylsuccinate (DMS) was twice that in 0.01 M o-phthalate-buffered cultures. This difference could be totally accounted for by o-phthalate inhibition of the activity of the ligninolytic system. 14CO2 production from ring-, sidechain-, and methoxyl-labeled lignins was inhibited, the degree of inhibition being dependent on o-phthalate concentration. Oxidations of 14C-glucose, 14C-acetovanillone, and 14C-apocynol were not inhibited; thus o-phthalate is not a general inhibitor, and might inhibit activities involved in attack of the lignin polymer. DMS is a suitable buffer for the ligninolytic system. Degradation rates of ring-labeled lignin to 14CO2 of 10–15% in 24 h were obtained consistently over the pH range 3.6–4.5, with an optimum near pH 4.0.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406666
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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