Journal ArticleDOI
The distribution of lignin in sprucewood as determined by ultraviolet microscopy
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The distribution of lignin in black spruce has been determined quantitatively by the study of 05 μm transverse sections in a UV microscope as mentioned in this paper, showing that 72% of the total Lignin content was in the secondary wall leaving only 28% in the compound middle and cell corner middle lamella regions.Abstract:
The distribution of lignin in black spruce has been determined quantitatively by the study of 05 μm transverse sections in a UV microscope The average lignin concentration in the compound middle lamella was about twice that in the secondary wall The lignin concentration of the middle lamella at the cell corners of adjacent tracheids was nearly four times that in the secondary wall but the volume of the secondary wall was much greater than the volume of the middle lamella Thus, for earlywood, 72% of the total lignin was in the secondary wall leaving only 28% in the compound middle lamella and cell corner middle lamella regions The corresponding values for latewood were 82% and 18% respectively Use of oblique longitudinal sections of 01 μm thick permitted the resolution of the compound middle lamella The lignin concentration in the true middle lamella was found to be equal to that in the cell corner middle lamella and the primary wall lignin content to be about twice that in the secondary wallread more
Citations
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Journal ArticleDOI
Lignin chemistry—past, present and future
TL;DR: Later development, beginning with the dehydrogenation theory and experimental studies on the de-hydrogenative polymerization of p-hydroxycinnamyl alcohols, is reviewed in this article.
Book ChapterDOI
The Determination of Lignin
TL;DR: The determination of lignin is an analysis that is performed routinely for characterizing lignocellulosic material, for assessing the effects of chemical, physical, and biological treatments of wood and pulp, for monitoring effluents in wood processing industries and, in the case of chemical pulps, for estimating bleach chemical requirements as mentioned in this paper.
Journal ArticleDOI
Lignification and lignin topochemistry - an ultrastructural view.
TL;DR: The ultrastructural aspects of cell wall lignification and lignin topochemistry are discussed, which results in the filling of pores within the carbohydrate matrix following a sequence from the outer regions of the wall towards the lumen.
Book ChapterDOI
Microorganisms and enzymes involved in the degradation of plant fiber cell walls
TL;DR: This chapter describes the structure of wood and the main wood components, cellulose, hemicelluloses and lignins and the enzyme and enzyme mechanisms used by fungi and bacteria to modify and degrade these components are described in detail.
Journal ArticleDOI
Can Lignin Be Accurately Measured
TL;DR: Several methods have been developed over the years to measure lignin levels within a wide range of cell wall types as mentioned in this paper, including permanganate, acid detergent, and Klason.
References
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Journal ArticleDOI
Thin sections. I. A study of section thickness and physical distortion produced during microtomy.
TL;DR: The thicknesses of sections of n-butyl methacrylate polymer were determined by ellipsometry, and correlated with the color shown in reflected light, and agree well with optical theory and with previous published data for thin films.
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