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Lignins distribution

Saka S, Thomas RJ, Gratzl JS (1978) Lignin distribution Determination by energy-dispersive analysis of X-rays Tappi 61(1) 73-76... [Pg.60]

An alternative approach to measurement of lignin distribution is to assess variation in the porosity of wood which has been hydrolyzed to form a lignin skeleton (Donaldson 1987). Hydrolysis with sulfuric acid is particularly useful because of the swelling that occurs. This magnifies areas of the cell wall such as the S3 layer or the compound middle lamella which would otherwise be too small to measure. [Pg.127]

Three quantitative approaches to measure lignin distribution are interference microscopy, UV microscopy, and bromination/EDXA. The choice of method probably depends more on the availability of equipment than any other factor since each method can be applied to a similar range of specimen types. [Pg.128]

Table 4.3.1. Comparison of lignin distribution (% w/w) in softwoods determined by interference microscopy and UV microscopy. All values for interference microscopy have been converted from v/v to w/w using density values for lignin and carbohydrate of 1.335 and 1.521. (Stamm and Sanders 1966)... Table 4.3.1. Comparison of lignin distribution (% w/w) in softwoods determined by interference microscopy and UV microscopy. All values for interference microscopy have been converted from v/v to w/w using density values for lignin and carbohydrate of 1.335 and 1.521. (Stamm and Sanders 1966)...
Interference microscopy can be applied to the study of lignin distribution in wood, in differentiating xylem, and in chips during pulping. The only constraints are that the material can be embedded and sectioned, matched samples are available for calibration, and the specimen can be oriented to obtain transverse sections. [Pg.129]

Saka S, Whiting P, Fukazawa K, Goring DAI (1982) Comparative studies of lignin distribution by UV microscopy and bromination combined with EDAX Wood Sci Technol 16... [Pg.132]

Enkkson I, Lidbrandt O, Westermark U (1988) Lignin distribution in birch (Betula verrucosa) as determined by mercurization with SEM- and TEM-EDXA Wood Sci Technol 22 251-257... [Pg.143]

Russ JC (1974) X-ray microanalysis in the biological sciences J Submicrosc Cytol 6 55-79 Sachs IB, Clark IT, Pew JC (1963) Investigation of lignin distribution in the cell wall of certain woods J Polym Sci Part C 2 203-212... [Pg.144]

Westermark U, Lidbrandt O, Eriksson I (1988) Lignin distribution in spruce (Picea abies) determined by mercurization with SEM-EDXA technique. Wood Sci Technol 22 243-250 Whiting P, Goring DAI (1982) Chemical characterization of tissue fractions from the middle lamella and secondary wall of black spruce tracheids. Wood Sci Technol 16 261-267 Wood JR, Goring DAI (1971) The distribution of lignin in stem wood and branch wood of Douglas-fir. Pulp Pap Mag Can 72 T95-T102... [Pg.145]

See other pages where Lignins distribution is mentioned: [Pg.137]    [Pg.110]    [Pg.54]    [Pg.120]    [Pg.19]    [Pg.19]    [Pg.110]    [Pg.110]    [Pg.111]    [Pg.121]    [Pg.131]    [Pg.132]    [Pg.133]    [Pg.138]    [Pg.139]    [Pg.143]    [Pg.144]    [Pg.70]    [Pg.70]    [Pg.81]    [Pg.84]    [Pg.87]    [Pg.302]    [Pg.311]    [Pg.328]    [Pg.328]    [Pg.371]    [Pg.376]    [Pg.381]    [Pg.382]   
See also in sourсe #XX -- [ Pg.69 ]



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