Results 141 to 150 of about 3,056 (179)

Carbohydrate Metabolism in the Sapwood of Pinus radiata

Nature, 1963
THE 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, 2020
In 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, Wei-Jing, Chen, Xue-Fei, Cao, Yue-Ying, Chen, Bao-Chen, Zhao, Zhi-Hua, Jiang, Tong-Qi, Yuan, Run-Cang, Sun   +7 more
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Resin Metabolism in the Sapwood of Pinus radiata

Nature, 1963
Carbon-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, J. M. GUMBLEY, D. J. SPEDDING   +2 more
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Persistence of benomyl in pruned apricot sapwood

Australian Journal of Agricultural Research, 1975
The 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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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
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Morphological and Chemical Differences Between Sapwood, Discolored Sapwood, And Heartwood in Black Locust And Osage Orange

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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Chemical characterization ofPinus halepensissapwood and heartwood

Wood Material Science & Engineering, 2018
ABSTRACTThis 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, Djamel Aliouche, Andrey Pranovich, Stefan Willför   +3 more
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A method for reconstructing the development of the sapwood area of balsam fir

Tree Physiology, 1990
Leaf 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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Structural characterization of lignin in heartwood, sapwood, and bark of eucalyptus

International Journal of Biological Macromolecules, 2019
Understanding the distribution and structural features of lignin in heartwood, sapwood, and bark of terrestrial plants is important to optimize the industrial utilization of lignocellulose. In this work, the lignins in heartwood, sapwood, and bark of Eucalyptus urophylla × E. grandis were comparatively studied.
Ming-Zhao, Xiao, Wei-Jing, Chen, Si, Hong, Bo, Pang, Xue-Fei, Cao, Yun-Yan, Wang, Tong-Qi, Yuan, Run-Cang, Sun   +7 more
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The adjustment of growth, sapwood area, heartwood area, and sapwood saturated permeability of balsam fir after different intensities of pruning

Canadian Journal of Forest Research, 1988
Balsam fir trees established from advanced regeneration following a clear-cut in 1970 were pruned in June 1985 to live crown ratios of 0.6, 0.4, and 0.2 compared with control trees, which had live crown ratios of 0.8. After two growing seasons, we investigated the homeostatic adjustment of these trees to the loss of their foliage.
Hank A. Margolis, Robert R. Gagnon, David Pothier, Marius Pineau   +3 more
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