Browsing by Author "RUTTIMANN, C"
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- ItemBIOCHEMICAL AND GENETIC-STUDIES OF BACTERIA METABOLIZING LIGNIN-RELATED COMPOUNDS(1988) VICUNA, R; GONZALEZ, B; RUTTIMANN, C; SAPAG, A; SEELENFREUND, D
- ItemDNA-POLYMERASES FROM THE EXTREMELY THERMOPHILIC BACTERIUM THERMUS-THERMOPHILUS HB-8(1985) RUTTIMANN, C; COTORAS, M; ZALDIVAR, J; VICUNA, R
- ItemLIGNINOLYTIC ENZYMES OF THE WHITE ROT BASIDIOMYCETES PHLEBIA-BREVISPORA AND CERIPORIOPSIS-SUBVERMISPORA(1992) RUTTIMANN, C; SCHWEMBER, E; SALAS, L; CULLEN, D; VICUNA, R
- ItemMETABOLISM OF LOW-MOLECULAR-WEIGHT LIGNIN-RELATED COMPOUNDS BY STREPTOMYCES-VIRIDOSPORUS T7A(1987) RUTTIMANN, C; SEELENFREUND, D; VICUNA, RThe ability of the ligninolytic actinomycete Streptomyces viridosporus T7A to degrade selected lignin model compounds, both in the presence and in the absence of lignocellulose, was examined. Compounds studied included benzyl alcohols and aldehydes, plus dimers possessing intermonomeric linkages, which are characteristic of the lignin macromolecule. Oxidation of veratryl alcohol to the corresponding acid was significant only under ligninolytic growth conditions, i.e., in medium containing lignocellulose, while other benzyl alcohols and aldehydes were readily oxidized in its absence. S. viridosporus T7A reduces carbonylic groups of 1,2-diarylethane, but not of 1,2-diarylpropane structures, under both ligninolytic and non-ligninolytic culture conditions. Cleavage of 1,2-diarylpropane (.beta.-1), arylglycerol-.beta.-arylether (.beta.-0-4) and biphenyl structures by this strain could not be detected under either metabolic conditions.
- ItemMONITORING BACTERIAL CONSUMPTION OF LOW-MOLECULAR-WEIGHT LIGNIN DERIVATIVES BY HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY(1986) GOYCOOLEA, M; SEELENFREUND, D; RUTTIMANN, C; GONZALEZ, B; VICUNA, RThe lignolytic capacity of some natural bacterial isolates was examined. Strains were selected from samples of decaying wood by growth in a minimal medium containing aromatic compounds with a structural relationship to lignin as the sole carbon sources. These included derivatives of benzoic and phenylpropanoic acids, as well as a mixture of low molecular weight compounds obtained by fractionation of kraft lignin. Reversed-phase high-performance liquid chromatography analyses before and after cell growth in the latter revealed a degradation pattern of the different compounds present in the culture which was characteristic for each of the strains studied.