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Douglas-fir polyphenols and heartwood formation
Phytochemistry, 1997Abstract Phenolic extractives have been isolated from Douglas-fir sapwood and heartwood and identified by NMR and mass spectroscopy. Pinocembrin, [5,5′]-bisdihydroquercetin and two lignans, pinoresinol and 2,3-dihydro-2-(4′- O -β-glucopyranosyl-3′-methoxyphenyl)-3-hydroxymethyl-5-(3-hydroxypropyl)-7-methoxy-benzofuran are reported for the first time ...
Dellus, V. +5 more
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Formation Mechanism of Heartwood and Research Status
2021The formation mechanism of heartwood is a scientific problem which has not been fully revealed in wood science. Effective regulation of heartwood formation is a scientific problem that is rarely studied and has not yet achieved a breakthrough in the field of forest cultivation.
WU Guangping +9 more
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New Insights into Heartwood and Heartwood Formation
2013The formation of true or obligate heartwood in the innermost living xylem tissues of many tree species is one of the most important ecological and economical secondary differentiation processes. Natural durability, biological, technological, and esthetic parameters of wood and its products depend on the presence, quality, and quantity of heartwood ...
Andreas Kampe, Elisabeth Magel
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Heartwood, its function and formation
Wood Science and Technology, 1976Some of the changes which occur in wood during the transition from sapwood to heartwood have been reviewed. The nature of these changes suggest that heartwood formation is a regulatory process serving to keep the amount of sapwood at an optimum level.
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Heartwood formation in living stumps of Douglas-fir
Wood Science and Technology, 1970An anatomical and chemical examination was made of living stumps of Douglas-fir. Changes in heartwood and extractives formation are not significant under the conditions of severe physiological stress that existed unless cell morphology was also altered.
R. W. Hemingway, W. E. Hillis
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Chemical aspects of heartwood formation
Wood Science and Technology, 1968A complete understanding of the processes underlying the transformation of sapwood into heartwood requires consideration of the chemical as well as other aspects of the change. A review of recent investigations into chemical topics is presented. There is a decrease in the storage materials from the outer and middle sapwood to the heartwood boundary ...
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Nuclear behaviour during heartwood formation inAcacia auriculiformis A. Cann.
Proceedings / Indian Academy of Sciences, 1982Nuclear behaviour is studied inAcacia auriculiformis A. Cann. with reference to aging in both axial and ray parenchyma cells (contiguous to vessels and away from the vessels). The size of the nucleus and nucleolus reduces gradually towards the inner sapwood and at last they disappear at the heartwood boundary.
K V Bhat, J D Patel
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Is oxygen involved in beech (Fagus sylvatica) red heartwood formation?
Trees, 2007European beech (Fagus sylvatica) facultatively develops red heartwood, which decreases the value of its timber and is difficult to predict in standing trees. According to current theory, the absence of oxygen prevents discolouration in the wood of uninjured trees, and red heartwood forms when oxygen enters the stem through injuries.
Johannes Sorz, Peter Hietz
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