[Isolation and characterization of humin-like substances produced by wood-degrading fungi causing white rot]. / Poluchenie i kharakteristika guminopodobnykh veshchestv, sinteziruemykh derevorazrushaiushchimi gribami, vozbuditeliami "beloi gnili".

Three samples of high-molecular-weight humin-like substances were obtained by solid-phase cultivation of Coriolus hirsutus and/or Cerrena maxima on oat straw. The yield of humin-like substances amounted to 1.38-2.26% of the weight of the plant substrate consumed. These substances, produced both by individual and mixed cultures of the basidiomycetes, were shown to be similar in their structure and physicochemical properties. According to the data of IR and 13C-NMR spectroscopy, the substances contained aromatic fragments and were close to soil humic acids. Studies of the dynamics of laccase production suggested that the humin-like substances were produced bia direct degradation of lignin macromolecules with direct involvement of extracellular laccase.

[The effect of trisporic acids on the composition of components of the cell wall in Blakeslea trispora Thaxter]. / Vliianie trisporovykh kislot na sostav komponentov kletochnoi stenki Blakeslea trispora Thaxter.

The cell wall of Blakeslea trispora was found to contain chitin similar to crustaceaous chitin in physico-chemical properties; this was confirmed by the data of IR spectroscopy and X-ray diffraction analysis. Trisporic acids, hormonal regulators of reproduction, hardly affected the content of chitin, xylan, and other polysaccharides of the cell wall of Blakeslea trispora, but increased the content of protein.