athe transition from sapwood to heartwood is accompanied by an increase in extractive content. 转折从多汁木材到心材由在可提取内容的增量伴随。 [translate] 英语翻译 日语翻译 韩语翻译 德语翻译 法语翻译 俄语翻译 阿拉伯语翻译 西班牙语翻译 葡萄牙语翻译 意大利语翻译 荷兰语翻译 瑞典语翻译 希腊语翻译 51...
The aim of this research is to identify the characteristics of sapwood and heartwood of manglid wood both in the logs and sawn boards; and to evaluate the differences of sapwood and heartwood content of sawn board from two sawing patterns: live sawing pattern and semi quarter sawing pattern...
The latter often applies to the sapwood being richer in sugar, whereas the heartwood mostly shows static-free structures. Over the whole cross section Douglas fir reveals a uniformly sharp picture of the growth rings, showing projecting summerwood without marking of the heart. Pine, however, ...
a very thin layer of real wood is peeled from a tree and attached to a substrate; sometimes the veneer can be one continuous repeating piece because it is rotary-sliced to shave off the veneer layer as the tree trunk is spun by machines. Assuming it is a real wood veneer...
It’s difficult to speak in generalities with a high degree of certainty, but here are some things to consider in a wood’s grain and its influence on strength. An increased microfibril angle (MFA) in the wood’s cell walls may lead to a decrease in modulus of elasticity. Heartwood ...
Consequently, while heartwood is preserved, sapwood might be fully or partially missing. In such cases, the year of felling must be estimated by adding a suitable number of sapwood rings. A heartwood age rule (HAR) has been advocated for Scots pine and adapted to European larch and Cembra ...
anew techniques of wood dyeing such as dyeing sapwood to its heartwood of black walnut(Kong,1 99 1),two ways of dyeing of xylem utilizing the sap flow of living trees(Iida Ikuho,et al,1 99 l a,1 99 1 b), 洗染例如洗染的多汁木材的木头新的技术对黑核桃木Kong, 1( 99 1,木质部)...
Brazil is one of the leading producers of soybeans and other annual crops, and in several regions landowners are required by law to maintain 20% of their lands with natural vegetation (i.e. as "legal reserves"). However, there is a growing concern that some of these reserves will be sub...
(The sapwood was on the outside and the heartwood in the direction of the archer). The size of the longbow depended on the archer’s height. The typical size of a bow was about 2 meters (six feet). In the center there was a thickened grip and the string was usually made from gut...
1988; Termiticidal activities in the heartwood, bark/sapwood and leaves of Juniperus species from the United States. Biochem Sys Ecol 16: 453±456.Adams RP, Mcdaniel CA, Carter FL. 1998. Termiticidal activities in the heartwood, bark/ sapwood and leaves of juniperus species from the ...