Results 241 to 250 of about 2,248,982 (273)

Preferred crystallographic orientation in mature and juvenile wood

Zeitschrift für Kristallographie - Crystalline Materials, 2007
Investigations of the crystallograpically organized regions of mature and juvenile Scots pine wood were performed. Experimental methods of X-ray diffraction were applied. Incomplete pole figures were measured, in order to calculate the orientation distribution function. The differences in the texture of the mature and juvenile wood were determined. The
Jan T. Bonarski, Wieslaw Olek
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Axial and radial wood maturation in three mistletoe ‘giants’ (Loranthaceae)

IAWA Journal, 2022
Summary The formation of juvenile wood featuring greater cell variation relative to mature wood is a well-known phenomenon. Once wood attains maturity, it has both more consistent cell sizes and organization. This is especially well understood for large trees used for paper and timber production, but less so for shrubs and bushes ...
Victor Sibinelli, Gregório Ceccantini
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Demarcation of juvenile and mature woods of planted Chinese fir and its wood quality prediction

Journal of Forestry Research, 1998
According to the data of trashed length, micro fiber angle, air density, ring width and late wood percentage, with the analysis of optimum method of classification, the boundary line of juvenile wood and mature wood of planted Chinese fir (Cunninghamia lanceolata) was determined as the 14th year.
Li Jian, Liu Yixing, Cui Yongzhi, Xu Zicai   +3 more
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Wood-polymer composites produced by in situ polymerization of styrene into juvenile and mature pine woods

International Wood Products Journal, 2020
A wood-based polymer composite was manufactured and characterized using in situ polymerization of styrene into juvenile and mature pine wood. Treatment parameters and properties were evaluated by using infrared spectroscopy, thermogravimetry and ...
A. Acosta, Ezequiel Gallio, H. Schulz, P. Zanatta, K. T. Barbosa, R. de Avila Delucis, D. Gatto   +6 more
semanticscholar   +1 more source

Juvenile-mature wood transition in pine: correlation between wood properties and candidate gene expression profiles

Euphytica, 2008
There is a strong desire to exploit transcriptomics data from model species for the genetic improvement of non-model crops. Here, we use gene expression profiles from the commercial model Pinus taeda to identify candidate genes implicated in juvenile-mature wood transition in the non-model relative, P. sylvestris.
Kumar, M., Saranpaa, P., Barnett, J., Wilkinson, M.   +3 more
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Effects of the maturity of wood waste compost on the structural features of humic acids

Bioresource Technology, 2009
An analytical scheme for the separation of humic substances (HSs) and non-humic substances (non-HSs) was established to estimate the humification index (HI), which was defined as the ratio of HS carbon content to non-HS carbon content. The alkaline compost-extract contained a mixture of HSs and non-HSs, while acidification of the compost-extract ...
Masami, Fukushima, Kanako, Yamamoto, Keishi, Ootsuka, Takeshi, Komai, Toshihiro, Aramaki, Shigeru, Ueda, Shigekazu, Horiya   +6 more
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Modelling anisotropic maturation strains in wood in relation to fibre boundary conditions, microstructure and maturation kinetics

Holzforschung, 2005
Abstract A generalisation of existing mechanical models is proposed to account for the relation between wood macroscopic properties and fibre microstructure and chemical composition. It is applied to understanding of the origin of anisotropic maturation strains measured at the outermost surface of the xylem.
Tancrède Alméras, Joseph Gril, Hiroyuki Yamamoto   +2 more
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Growth responses of mature loblolly pine to dead wood manipulations

Forest Ecology and Management, 2012
Large-scale manipulations of dead wood in mature Pinus taeda L. stands in the southeastern United States included a major one-time input of logs (fivefold increase in log volume) created by felling trees onsite, annual removals of all dead wood above P10 cm in diameter and P60 cm in length, and a reference in which no manipulations took place.
Michael D. Ulyshen, Scott Horn, James L. Hanula   +2 more
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Hypotheses for the generation of wood maturation stress

2005
Inexistant
Almeras, Tancrède, Clair, Bruno, Sugiyama, J., Masato, Y., Yamamoto, Hiroyuki   +4 more
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Wood properties of juvenile and mature heartwood in Robinia pseudoacacia L.

Wood Science and Technology, 2009
The aim of this study is to characterise the properties of juvenile and mature heartwood of black locust (Robinia pseudoacacia L.). Content, composition and the subcellular distribution of heartwood extractives were studied in 14 old-growth trees from forest sites in Germany and Hungary as well as in 16 younger trees of four clone types.
Oliver Dünisch, Hans-Georg Richter, Gerald Koch   +2 more
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