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THE SAPWOOD-HEARTWOOD TRANSITION
Australian Forestry, 1952SUMMARY The transition from sapwood to heartwood in certain species has been described in detail, and the formation of intermediate wood discussed. The distinction between sapwood and heartwood cannot always be clearly made on the basis of colour, or on the presence of starch or tyloses, but must be based on the fundamental change which lies behind ...
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Heartwood constituents of Betula maximowicziana
Phytochemistry, 1997Abstract In addition to two lignans, (−)-(7R,8S,8′S)-lyoniresiol (3) and (−)-(7R,8S)-dihydrodehydrodiconiferyl alcohol (4) in their racemic forms, respectively, a biphenyl-type diarylheptanoid (−)-(a‡S,3″S,5″S)-alnusdiol (1) and a diphenyl ether type diarylheptanoid [(−)-rel-(p§R,3S,5S)-3′,4″-epoxy-1-(4-hydroxyphenyl)-7-phenylheptane-3,5-diol] named ...
Fujinori Hanawa +2 more
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Sandridge, Heartwood Forest (car park)
2011In response to a condition on the planning permission for a new car park and access road at Heartwood Forest, Sandridge, Herts. The Heritage Network was commissioned by The Woodland Trust to undertake a programme of archaeological monitoring of the development groundworks.
Densem, R, Ashworth, H
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Abstract In the Epilogue, “Heartwood,” Williams travels to Japan as a gift to his dying friend, Seiji Ozawa, and a few months later he commemorates the 50th anniversary of the loss of his first wife, Barbara Ruick—a loss that still haunts him after a half century of great highs and unbelievable acclaim.
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Drying of sapwood, heartwood and mixed sapwood and heartwood boards of Pinus radiata
Holz als Roh- und Werkstoff, 2000boards 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 ...
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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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