Rotting wood

C13-0112. Fungal laccase is an enzyme found in fungi that live on rotting wood. The enzyme is blue and contains 0.40% by mass copper. The molar mass of the enzyme is approximately 64,000 g/mol. How many copper atoms are there in one molecule of fungal laccase ... 

Micales JA, Highley TL. In vitro production of hydrogen peroxide by degradative andnon-degradative isolates ofbrown-rot wood decay fungi. Phytopathology 1989 77 988. 

Micales JA. Oxalate decarboxylase in the brown-rot wood decay fungus, Postia placenta. Mat U Org 1995 29 177. 

Fungus (brown rot) Wood species Threshold [WPG (%)] Virulence (%) Reference... 

The relationship, if any, between the secondary metabolism of L-phenylalanine and carbohydrate degradation during brown-rot wood decay processes has not yet been determined. However, we suspect that the secondary metabolism of this aromatic amino-acid plays an important role in converting monomeric sugars to nitrogen-free metabolites (Shimada, M., and Takahashi, M., In Handbook of Wood and Cellulosic Materials Hon,... 

The decomposition of hypaphorine into indole and trimethylamine occurs slowly in the rotting wood of Abrus precatorius L., and is responsible for its fecal odor. It also led van Romburgh (30) to propose the correct structure for hypaphorine, which was soon established by synthesis from L-tryptophan (17). 

Isolation of two trimeric compounds with lactone ring. Holzforschung 35 183-187 Yeboah SA, Wang S-H, Griffiths PR (1984) Effect of pressure on diffuse reflectance infrared spectra of compressed powders. Appl Spectrosc 38 259-264 Zavarin E, Nguyen C, Romero E (1982) Preparation of enzymatically liberated lignin from naturally brown-rotted wood. J Wood Chem Technol 2 343-37... 

Two species of nuthatch, the brown-headed nuthatch of North America (Sitta pusilla) and the orange-winged sittella (Neositta chrysoptera) of Australia, are known to manipulate small twigs with their beaks for use in drawing insects within reach from deep in bark crevices or rotted wood. These are rare examples of the use of tools by birds. 

Trunk with shelflike growths. Cause Wood rots. Wood rots near the base of the tree, caused by various species of fungus, are indicated by the appearance of shelflike growths. Prevent the disease by maintaining general health and treating injuries to the tree. Once established over a large area of the trunk, there is little that can be done remove the tree. 

Advanced (or typical) decay. The older stage of decay in which the destruction is readily recognized because the wood has become punky, soft and spongy, stringy, ringshaked, pitted, or crumbly. Decided discoloration or bleaching of the rotted wood is often apparent. 

Ethylpyridine has a very powerful, sweet-green character, is nauseating in the pure state, but after dilution becomes slightly minty with a sweet-herbaceous odor, presenting mildly tarry-pungent undertones. There is a certain similarity to the odor of mushrooms and dry-rotted wood (Arctander, 1967). 

Glyoxal oxidase from the white-rot wood-metabolizing basidiomycete Phanerochaete chrysosporium has been characterized as a novel radical—copper oxidase. This enzyme exhibits a wide substrate specificity for oxidation of simple aldehydes to the corresponding carboxylic acids according to Equation (5). 

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