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Download e-book for kindle: Association Between Lignin and Carbohydrates in Wood and by Professor Tetsuo Koshijima, Professor Takashi Watanabe

By Professor Tetsuo Koshijima, Professor Takashi Watanabe (auth.)

ISBN-10: 3642078532

ISBN-13: 9783642078538

ISBN-10: 3662051915

ISBN-13: 9783662051917

From the reviews:

"The Springer sequence in wooden technology provides a precious compilation of the study box of lignin-polysaccharide institutions in plant cellphone partitions with emphasis on woody crops. … this can be an incredible paintings either for all those that input this topic for the 1st time and should you are already inquisitive about this interesting, complicated and nonetheless now not absolutely resolved bankruptcy of nature." (G. Wegener, wooden technology and know-how, Vol. 37, 2004)

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Additional resources for Association Between Lignin and Carbohydrates in Wood and Other Plant Tissues

Sample text

I .. :.... A.. ~I- 2 . A.. ~. •...... ".. t' b 8 • ... I- ..... I. . : -. .... .. " ...... - ... ... O~------~------~------~~·~--~ ~ d ~ d ~ Moleculor weight a. Fig. 9a, b. Molecular weight distribution of the MWL and the LCC from Fagus crenata wood. Native MWL, ... acetylated MWL. b • Native B-P,'" acetylated B-P. 31. Molecular weights of milled wood lignin (MWL) and LCC fractions from Fagus crenata and Pinus densiflora wood. 5) Values based on total area of the diagrams in Figs. 10. '.

79% acetyl groups. 17). At about the same time, Yaku and Koshijima (197l) reported an interaction between lignin and the acetylglucomannan obtained from the red pine wood LCe. 17. 5-m column. (Koshijima et al. 79% acetyl. chitosan. The lignin content decreased to 81 % and then to 67% after a second round of chitosan treatment. The lignin adsorbed on the chitosan column was dissolved out by eluting with ethanol and recovered as waterinsoluble lignin, identical to the original lignin with regard to UV and IR spectra.

Internodes. Clearly p-coumaric acid is mostly Fractionation and Characterization of Lignin-Carbohydrate Complexes Carb(Llg) Carb(Ug) ~ Ester b ° g 0 ~I :::,.. R H, .... Pd/C,rt --"-- ~~ g ~ ~ I 6 7 :::,.. R ~ ~ OH LlBH, R ~~ OH .. Et,o·Toluene reflux,3h ~I :::,.. OH 4N NaOH R OH ~ 170 'C, 2h ~I :::,.. -'_ .. ~ Pd/C, rt ~ ~ :::,.. o 0, 10 11 'Ug I UBH, R ° HO .. Et,O·Toluene reflux,3h Ug ~ ~I :::,.. R 0, ° ~ HO 4N NaOH ... 170 'C, 2h ~I :::,.. R OH lIg + 12 11 Ug-OH ~ OH LlBH, Ester-Ether Bridge ~ Et,o·Toluene reflux,3h 14 13 ~I :::,..

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Association Between Lignin and Carbohydrates in Wood and Other Plant Tissues by Professor Tetsuo Koshijima, Professor Takashi Watanabe (auth.)


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