heartwood

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heartwood

heartwood the central, woody core of a tree, no longer serving for the conduction of water and dissolved minerals; heartwood is usually denser and darker in color than the outer sapwood . Before the synthesis of aniline dyes, the heartwood of several tropical trees (sold collectively under the commercial name brazilwood ) was used to produce blue, purple, and red dyes. As a tree becomes older, the heartwood increases in diameter, whereas the sapwood remains about the same thickness. See wood .

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heartwood

A Dictionary of Biology | 2004 | Â© A Dictionary of Biology 2004, originally published by Oxford University Press 2004. (Hide copyright information) Copyright

heartwood (duramen) The wood at the centre of a tree trunk or branch. It consists of dead xylem cells heavily thickened with lignin and provides structural support. Many heartwood cells contain oils, gums, and resins, which darken the wood. Compare sapwood.

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	Tree heartwood extracts halt sudden oak death. Magazine article from: Agricultural Research; 4/1/2008
	Heartwood.(Brief article)(Book review) Newspaper article from: Small Press Bookwatch; 3/1/2009
	Heartwood.(Brief Article)(Poem) Magazine article from: National Catholic Reporter; 10/27/2000

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	NATURAL DECAY RESISTANCE OF HEARTWOOD FROM DEAD, STANDING YELLOW-CEDAR TREES: LABORATORY EVALUATIONS. Magazine article from: Forest Products Journal; 1/1/2000; ; 700+ words ; ...degrades, leaving columns of essentially heartwood standing like ghosts in the forest until...characterize the natural durability of heartwood from dying and dead yellow-cedar trees...were to characterize the durability of heartwood in living and dead stems using standard...
	Influence of site on sapwood and heartwood ratios of Turkish calabrian pine. Magazine article from: Forest Products Journal; 4/1/2003; ; 700+ words ; ...influence of site factor on the sapwood and heartwood ratios of Turkish calabrian pine (Pinus...results indicated that the sapwood and heartwood ratios of the calabrian pine wood grown...percent, respectively. The highest heartwood ratio (8.33%) was determined for...
	Holding out hope at Heartwood Newspaper article from: Portland Press Herald (Maine); 3/29/2009; ; 700+ words ; ...03-29-2009 Holding out hope at Heartwood Byline: Bob Keyes by Bob Keyes staff...News These should be heady times at Heartwood College of Art, the little-college...Maine State Board of Education approved Heartwood's plan to offer a low-residency master...
	Models for predicting vertical profiles of heartwood diameter in mature Scots pine.(Report) Magazine article from: Canadian Journal of Forest Research; 3/1/2009; ; 700+ words ; ...and many other European countries the heartwood of Scots pine (Pinus sylvestris L...increase the risk of decay. While the heartwood of Scots pine is regarded as moderately...made from Scots pine consist of a mix of heartwood and sapwood. A board consisting of wood...
	The influence of irrigation and fertilization on heartwood and sapwood contents in 18-year-old Eucalyptus globulus trees. Magazine article from: Canadian Journal of Forest Research; 10/1/2006; ; 700+ words ; ...trees was assessed in relation to heartwood content, accumulation of extractives...of growth (IL). Within the tree, heartwood content decreased from the base upwards...height for IL and C trees, respectively. Heartwood volume represented 65.6% and 55...
	Heartwood Center Announces Launch of 2009 Women And Cancer Program. PR Newswire; 3/10/2009; 681 words ; ...CHICAGO, March 10 /PRNewswire/ -- The Heartwood Center today announced that it has launched...of this year, making available all of Heartwood's services free of charge to a number...said Nancy Floy, Executive Director of Heartwood Center. "Without it, and the State...
	Sawing simulation of maritime pine (Pinus pinaster Ait.) stems for production of heartwood-containing components. Magazine article from: Forest Products Journal; 4/1/2005; ; 700+ words ; Abstract Naturally durable heartwood products have smaller dimensional...production of products containing heartwood from maritime pine (Pinus pinaster...internal knot architecture, and heartwood. Stems were used as raw material...
	The relationship between site and tree characteristics and the presence of wet heartwood in black spruce in the boreal forest of Quebec, Canada. Magazine article from: Canadian Journal of Forest Research; 6/1/2006; ; 700+ words ; Abstract: Wet heartwood in black spruce (Picea mariana (Mill...try to avoid harvesting stands with wet heartwood, but no relationship has been yet established between the incidence of wet heartwood and tree or site characteristics. To...
	Comparison of fixation rates of earlywood, latewood, sapwood, and heartwood of CCA-treated Douglas-fir, southern pine, and eastern larch. (Solid Wood Products).(Statistical Data Included) Magazine article from: Forest Products Journal; 5/1/2002; ; 700+ words ; ...sapwood), whole sapwood, and whole heartwood of Douglas-fir (Pseudotsuga menziesii...species. CCA also fixed more rapidly in heartwood than in sapwood in all species. Generally...comparative CCA fixation of sapwood and heartwood. Even though most treated wood contains...
	Occurrence, proportion, and vertical distribution of red heartwood in paper birch.(Report) Magazine article from: Canadian Journal of Forest Research; 7/1/2008; ; 700+ words ; ...brown-, discolored wood known as red heartwood. Its occurrence, proportion, and vertical...of 18 trees showing occurrence of red heartwood at stump height were felled, and 5 cm...cut at every 0.5 m of height. Red heartwood volume, proportion, and vertical distribution...