INSPIRING FUTURES

Relationships between mechanical properties, weight loss and chemical composition of wood during incipient brown rot decay.

Curling, Simon, Clausen, Carol A and Winandy, Jerrold E (2002) Relationships between mechanical properties, weight loss and chemical composition of wood during incipient brown rot decay. Forest Products Journal, 52 (7/8). pp. 34-39. ISSN 0015 7473

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Abstract/Description

Incipient decay of wood by brown-rot fungi causes measurable strength losses in wood before measurable weight loss occurs. Previous studies have shown that the high levels of strength loss that occur during incipient brown-rot decay may be related to loss in hemicellulose. This study investigates the effect of decay on hemicellulose composition and the relationship of decay to the mechanical properties of the wood. An in vitro test method was used to allow progressive sampling of southern pine exposed to monocultures of brown-rot fungi.
The wood was subsequently analyzed by mechanical testing
and chemical analysis. The results demonstrated a ratio of strength to weight loss of approximately 4: I. The chemical data indicated that early strength loss (up to
40%) was associated with loss of arabinan and galactan components. Subsequent strength loss (greater than 40%) was associated with the loss of the mannan and xylan
components. Significant loss of glucan (representing cellulose) was only detected at greater than 75 percent modulus of rupture loss.

Item Type: Article
Print ISSN: 0015 7473
Uncontrolled Keywords: wood; brown-rot fungi; decay; strength loss; hemicellulose; southern pine; arabinan; galactan; mannan; xylan;
University Divisions/Research Centres: Faculty of Engineering, Computing and Creative Industries > School of Engineering and the Built Environment
Dewey Decimal Subjects: 500 Science > 570 Life sciences; biology > 572 Biochemistry
600 Technology > 620 Engineering > 620 Engineering & allied operations
500 Science > 570 Life sciences; biology > 579 Microorganisms, fungi & algae
Library of Congress Subjects: Q Science > QD Chemistry
Q Science > QP Physiology
T Technology > TA Engineering (General). Civil engineering (General)
Item ID: 1983
Depositing User: RAE Import
Date Deposited: 10 Jun 2008 11:08
Last Modified: 17 Jun 2013 15:38
URI: http://researchrepository.napier.ac.uk/id/eprint/1983

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