Results 221 to 230 of about 109,305 (261)

Morphological changes and surface reactions of wood fibers in wood composites

Journal of Thermoplastic Composite Materials, 2012
This work addressed questions regarding the fate of wood pulp fibers in the composite manufacturing process, for instance whether the processing induced fiber damages, and the improved interfacial adhesion accelerated this function. A number of wood fibers were blended with various maleic anhydride-grafted polymers fully and partially to study their ...
Ruijun Gu, Mohini M Sain, Bohuslav V Kokta   +2 more
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Topochemistry of the Wood-Isccyanate Reaction an Analysis of Reaction Profiles

Journal of Wood Chemistry and Technology, 1986
Abstract The rate of reaction of Scots pine (Pinus sylvestris) with n-butyl isocyanate was followed by measuring weight percent gain (WPG) as a function of time (t). A model was developed to predict the form that an equation representing the WPG versus t ‘reaction profile’ might take.
H. West, W. B. Banks
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Wood Property Variation as Related to Tree Form and Reaction Wood

1989
One of the best and easiest ways to alter wood properties is to manipulate tree form. This effective approach to controlling variation in wood is frequently overlooked. Tree form is so useful because it can be manipulated both genetically and silviculturally, and changes in wood properties can be obtained relatively rapidly.
Bruce J. Zobel, Johannes P. van Buijtenen   +1 more
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Ultrasonic Imaging of Reaction Wood in Standing Trees

2012
Wood is an orthotropic material and its properties depend on its age but also depend on environmental growing conditions. An important feature of property alteration is reaction wood formation. Reaction wood forms when part of a tree is subjected to mechanical stress, and helps to bring parts of the plant into an optimal position.
Brancheriau, Loïc, Saadat-Nia, Mohammad Ali, Gallet, Philippe, Lasaygues, Philippe, Pourtahmasi, Kambiz, Kaftandjian, Valérie   +5 more
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Hormonal Control of Reaction Wood Formation

2021
Gymnosperm and angiosperm trees differ in the nature of their reaction wood produced following shoot bending for uplifting of the stem to its straight vertical position. In gymnosperm trees, the reaction wood is called compression wood that develops in the lower side of curved stem.
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FTIR studies of the “wood”-isocyanate reaction

Journal of Molecular Structure, 1988
Abstract FTIR spectroscopic studies have been carried out of the reaction of n-butyl isocyanate with whole wood and with isolated lignin and holocellulose components. The reaction produces a permanent carbamate derivative which imparts hydrophobic qualities to wood. Evidence is presented of allophanate formation under conditions of excess reagent.
N.L. Owen, W.B. Banks, H. West
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Cell Wall Polymers in Reaction Wood

2013
In this chapter we concentrate on the structure of reaction wood and its functional properties. The fact that a lot more detailed information exists on tension wood rather than on compression wood, this is reflected in the amount of information in this chapter.
Fagerstedt, K.V., Mellerowicz, E., Gorshkova, T., Ruel, K., Joseleau, J.P.   +4 more
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Reaction Wood: Induction and Mechanical Action

Annual Review of Plant Physiology, 1977
INTRODUCTION 23 ANATOMICAL CHARACTERISTICS 24 INDUCTION UNDER "NORMAL" CONDITIONS 25 INDUCTION UNDER EXPERIMENTAL CONDITIONS 26 PhYSical 26 Biochemical ... ... ..... ......... ........ ..... ..... 30 ENDOGENOUS DISTRIBUTION OF GROWTH REGULATORS 31 GROWTH STRESSES AND STRAINS 33 Nature and 01'igin 33 Measurement 34 ...
B F Wilson, R R Archer
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The Soil Reactions of the Ferns of Woods and Swamps

American Fern Journal, 1921
The ferns to which this essay is devoted are on the whole less sensitive to soil acidity and alkalinity than those which grow on rocks, to which attention was directed in a previous paper.' It seems worth while, however, to place on record what data have been obtained on testing the soils surrounding their roots by the indicator method.
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The heat of reaction during the pyrolysis of wood

Combustion and Flame, 1971
Published estimates of the overall heat of reaction, during the pyrolysis of wood range from q = 370 J/g (endothermic) to q = −1700 J/g (exothermic). Data from differential thermal analyses show that the pyrolysis of lignin is more strongly exothermic than that of cellulose; this is consistent with the data from two sets of experiments with bulk ...
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