Results 231 to 240 of about 24,928 (265)

Tropical tree species with high wood specific gravity have higher concentrations of wood phosphorus and are more efficient at resorbing it. [PDF]

AoB Plants
González-Melo A, Posada JM, Beauchêne J, Lehnebach R, Clair B.   +4 more
europepmc   +1 more source

Tree Rings Mercury Controlled by Atmospheric Gaseous Elemental Mercury and Tree Physiology. [PDF]

Environ Sci Technol
Peng H, Zhang X, Bishop K, Marshall J, Nilsson MB, Li C, Björn E, Zhu W.   +7 more
europepmc   +1 more source

Provenance differences and factors influencing transpiration of <i>Cunninghamia lanceolata</i> in a common garden experiment. [PDF]

Front Plant Sci
Xu T, Niu X, Wang B.
europepmc   +1 more source

Bleaching of different sapwood pulps using enzymes from a thermophillic fungus

, 2000
M. Sarwar Jahan, Ahmed Jabid Hasan, Deepshikha Chowdhury, Md. Khairul Islam   +3 more
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The Zurich method for sapwood estimation

Dendrochronologia, 2020
Abstract We present a new predictor for the estimation of the number of missing sapwood rings in oak. It circumvents a number of problems with predictors used in traditional sapwood estimation procedures such as mean ring width or tree age. Instead, we use the mean ring width of the last 9 heartwood rings and the first sapwood ring, which mirrors the
Niels Bleicher, Felix Walder, Urs Gut, Matthias Bolliger   +3 more
openaire   +1 more source

Patterns of change of saturated sapwood permeability and sapwood conductance with stand development

Canadian Journal of Forest Research, 1989
The saturated sapwood permeability (k) of jack pine (Pinusbanksiana Lamb.) from stands of different ages and site qualities was measured using a constant water flow apparatus. Saturated sapwood permeability at the base of the live crown (BLC) increased with age and reached a plateau just beyond 4 × 10−12 m2. The rate at which this plateau was reached,
David Pothier, Hank A. Margolis, Richard H. Waring   +2 more
openaire   +1 more source

Triterpenes from Douglas fir sapwood

Phytochemistry, 1981
Abstract The saponified ether-soluble extractives of Douglas fir sapwood contained (24R)- 4α,14α,24-trimethyl-9β,19-cyclo-5α-cholestan-3β-ol(24R-cyclocucalanol),a new natural product; 4α,14α-dimethyl-9β,19-cyclo-24-methylene-5α-cholestan-3β- ol (cycloeucalenol); and (24R)-4α,24-dimethyl-5α-cholest-7-en-3β-ol (24R- methyllophenol); this is the first ...
Anthony H. Conner, Daniel O. Foster
openaire   +1 more source

Sapwood taper models and implied sapwood volume and foliage profiles for coastal Douglas-fir

Canadian Journal of Forest Research, 1996
Sapwood dimensions lend insight into the functional and ecophysiological structure of trees and can therefore be profitably applied in various types of growth analyses and simulation models. Ten taper models were fitted to sapwood data from the stems of 134 Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) trees and were compared by various fit ...
Douglas A. Maguire, João L.F. Batista
openaire   +1 more source

Drying of sapwood, heartwood and mixed sapwood and heartwood boards of Pinus radiata

Holz als Roh- und Werkstoff, 2000
boards in stacks of all sapwood, all heartwood and mixed sapwood and heartwood, using a tunnel dryer. Drying temperatures were 90/60 °C and airflow was reversed every three hours, with an average air velocity of 5.0 m/s. For stacks of all sapwood and all heartwood boards, the influence of board thickness and position of thicker and thinner boards in ...
openaire   +1 more source