Results 181 to 190 of about 2,820 (212)

Pontamine fast scarlet 4B bifluorescence and measurements of cellulose microfibril angles

Journal of Microscopy, 2017
SummaryPontamine fast scarlet 4B is a red paper and textiles dye that has recently been introduced as a fluorescent probe for plant cell walls. Pontamine exhibits bifluorescence, or fluorescence dependent on the polarization of the excitation light: Because cellulose is aligned within the cell wall, pontamine‐labelled cell walls exhibit variable ...
J. THOMAS, N.A. IDRIS, D.A. COLLINGS
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Microfibril orientation in wood cells: new angles on an old topic

Trends in Plant Science, 2000
Although it is essential to obtain experimental evidence about any role for microtubules in microfibril orientation, the difficulty of accessing the developing wood cells in trees has to date required the use of excised, fixed material. A system in which cell-biological events can be followed, and experimentally manipulated, in vivo is clearly ...
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Variation of microfibril angles and chemical composition: Implication for functional properties

Journal of Materials Science Letters, 2003
Wood cell walls are a composite material consisting of cellulose, hemicellulose, lignin and other minor components, such as pectin and extractives. Two main factors, cellulose microfibril angle (MFA) in S2 layer (thickest layer) and chemical composition, govern functional properties of the cell wall such as Young’s modulus and growth-stress.
R. Hori, H. Suzuki, T. Kamiyama, J. Sugiyama   +3 more
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MICROFIBRIL ANGLES IN THE ROOT WOOD OF PINUS RADIATA AND PINUS NIGRA

IAWA Journal, 2001
Microfibril angles of the S2 layer and tracheid lengths were measured in the root wood of Pinus nigra, and the root and stem wood of Pinus radiata. Within 10 mm (the first 2–3 growth rings) from the root centre, microfibril angles were large in the wood of both species, ranging from 25° to 40°.
Junji Matsumura, Brian G. Butterfield
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Clonal and Within-tree Variation in Microfibril Angle in Poplar Clones

New Forests, 2006
The microfibril angle (MFA) of seven poplar clones was determined using X-ray diffraction technique. MFA was measured for every growth ring at breast height (1.3 m) for all sample trees, and at 0 (butt), 5.6, 9.6, 13.6, 17.6, 19.6 and 21.6 m for clone I-69, Nanlin-95 and Nanlin-895. A total of 900 samples (chips) were assessed.
Shengzuo Fang, Wenzhong Yang, Ye Tian
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Microfibril angles of softwood and hardwood pulp fibres

2014
The general relationship between the stress-strain behaviour and MFA of fibres is a well-known fact but little is known about variations within a single fibre or the effect of refining. Therefore, a simple method to determine MFA of selected single fibres is required.
Heinemann, Sabine, Retulainen, Elias
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Prediction of MOE of eucalypt wood from microfibril angle and density

Holz als Roh- und Werkstoff, 2003
Small clear specimens of 30×30×450 mm were prepared from plantation-grown Eucalyptus globulus, E. nitens and E. regnans that were between 15 and 31 years of age. Their modulus of elasticity (MOE) and modulus of rupture (MOR) were determined using static central-point-loading bending tests. Their microfibril angle (MFA) and density were determined using
J. L. Yang, R. Evans
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Regression models on the age-affecting and microfibril angle of Acacia mangium

Journal of the Indian Academy of Wood Science, 2010
Diffraction patterns arising from crystal planes of various sample forms of wood trees had attracted scientific research in determining the crystallographic measurements. As such the tropical hard wood in Sabah, Acacia mangium was chosen for experimental data. Age-contributing factors were measured; the angle of reflection (θ), relative intensity, full
Noraini Abdullah, Tamer A. Tabet, Fauziah Aziz   +2 more
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ESTIMATION OF MICROFIBRIL ANGLE OF INCREMENT CORES BY NEAR INFRARED SPECTROSCOPY

IAWA Journal, 2002
Eight Pinus radiata D. Don (Radiata pine) increment core samples representative of a total of thirty-two increment cores were selected. NIR spectra were obtained from the radial–longitudinal face of each core in 10-mm increments and used to develop a microfibril angle (MFA) calibration.
Laurence R. Schimleck, Robert Evans
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Effect of Physiological Age and Site on Microfibril Angle in Pinus Radiata

IAWA Journal, 1996
The effect of physiological age (shoot age at propagation) and site on microfibril angle was examined for seedlings (physiological age = 0 years) and cuttings (physiological age = 5-16 years) of Pinus radiata D. Don. Two trials were examined by measuring microfibril angle in alternate growth rings on breast height discs.
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