Results 181 to 190 of about 9,924 (218)
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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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Carbohydrate Metabolism in the Sapwood of Pinus radiata
Nature, 1963THE use of carbon-14 produced in nuclear bomb testing in biological investigation has been discussed in an earlier communication1. Since 1954 the specific activity of the carbon dioxide in the atmosphere over New Zealand has been increasing, as is shown in Fig. 1 2. We have used this effect to examine the carbohydrate metabolism of Pinus radiata.
A. T. WILSON, J. M. GUMBLEY
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Unmasking the heterogeneity of carbohydrates in heartwood, sapwood, and bark of Eucalyptus
Carbohydrate Polymers, 2020In this study, the cellulose and hemicelluloses in heartwood, sapwood, and bark of E. urophylla × E. grandis were comprehensively investigated. The ultrastructural topochemistry of carbohydrates in cell walls was examined in situ by confocal Raman microscopy.
Ming-Zhao, Xiao +7 more
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Persistence of benomyl in pruned apricot sapwood
Australian Journal of Agricultural Research, 1975The persistence of benomyl in pruned apricot sapwood was investigated. The amount of fungi toxicant recovered from sapwood after application of 5 µg benomyl to the pruned surfaces varied at different times of the year between 90 and 25% when sampled after 2 hr and between 45 and 15% when sampled after 15 days.
TV Price, MV Carter
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Peroxidase and amylase isoenzymes in the sapwood and heartwood of trees
Phytochemistry, 1982Abstract Peroxidases and amylases have been found in the sapwood and the heartwood of both angiosperm and gymnosperm trees.
R Ebermann
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Triterpenes from Douglas fir sapwood
Phytochemistry, 1981Abstract 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
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Resin Metabolism in the Sapwood of Pinus radiata
Nature, 1963Carbon-14 produced in nuclear explosions was used as a tracer to examine resin metabolism in Pinus radiata. Annual rings of trees were ground and the resin extracted. The C/sup 12/: C/sup 13/ and C/sup 14/ ratio of each sample was determined. Results indicate that all the resin activity is considerably lower than that of the atmosphere at the time the ...
A. T. WILSON +2 more
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Forest Science, 1968
Abstract A comparison was made of morphological and chemical differences between sapwood, discolored sapwood (wound-initiated discolorations), and heartwood in Maclura pomifera (Raf.) Schneid. and Robinia pseudoacacia L.
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Abstract A comparison was made of morphological and chemical differences between sapwood, discolored sapwood (wound-initiated discolorations), and heartwood in Maclura pomifera (Raf.) Schneid. and Robinia pseudoacacia L.
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Chemical characterization ofPinus halepensissapwood and heartwood
Wood Material Science & Engineering, 2018ABSTRACTThis paper describes the chemical composition of sapwood (SW) and heartwood (HW) of Pinus halepensis Mill stem. Extractives were first isolated by accelerated solvent extraction and then analysed by gas chromatography-mass spectrometry (GC-MS).
Nacera Benouadah +3 more
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A method for reconstructing the development of the sapwood area of balsam fir
Tree Physiology, 1990Leaf area is commonly estimated as a function of sapwood area. However, because sapwood changes to heartwood over time, it has not previously been possible to reconstruct either the sapwood area or the leaf area of older trees into the past. In this study, we report a method for reconstructing the development of the sapwood area of dominant and ...
M R, Coyea, H A, Margolis, R R, Gagnon
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