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UBC Theses and Dissertations
Radial distribution of thujaplicins and thujic acid in old growth and second growth western redcedar (Thuja plicata donn) Nault, Jason Ray
Abstract
Radial cross sections of seven old growth cedars and ten second growth cedars taken at breast height were cut into increments averaging about 60 years growth for old growth trees and 10 years growth for second growth trees. These increments were extracted with ethanol:benzene (1:2). The extractives were analyzed for thujaplicin content by colorimetry of their ferric chelates, as well as by a new method utilizing capillary gas chromatography (GC) of their methylated derivatives. A statistical analysis of the two methods gave an r² value of 0.81 and a slope of 0.99. Thujic acid contents were also determined by the new GC method. Distribution of thujaplicins and thujic acid generally increased from pith to outside heartwood, then decreased in the sapwood. Maximum thujaplicin contents were also related to the tree age.
Item Metadata
Title |
Radial distribution of thujaplicins and thujic acid in old growth and second growth western redcedar (Thuja plicata donn)
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1986
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Description |
Radial cross sections of seven old growth cedars and ten second growth cedars taken at breast height were cut into increments averaging about 60 years growth for old growth trees and 10 years growth for second growth trees. These increments were extracted with ethanol:benzene (1:2). The extractives were analyzed for thujaplicin content by colorimetry of their ferric chelates, as well as by a new method utilizing capillary gas chromatography (GC) of their methylated derivatives. A statistical analysis of the two methods gave an r² value of 0.81 and a slope of 0.99. Thujic acid contents were also determined by the new GC method.
Distribution of thujaplicins and thujic acid generally increased from pith to outside heartwood, then decreased in the sapwood. Maximum thujaplicin contents were also related to the tree age.
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Genre | |
Type | |
Language |
eng
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Date Available |
2010-06-27
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0075142
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.