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1. It comprises mainly lignin and cellulose fibres too short for re-use with an organic matter content of 10 % to 30 %.

2. Normal wood substance containing lignin does not do either of these things.

3. This material includes cellulose, hemicelluloses, pectin, and lignin.

4. Lignin is a characteristic component of secondary walls.

5. The structure unit of lignin is guaiacol.

6. Corn stalk is composed of cellulose, hemicellulose and lignin.

7. The application of alkaline liquor and alkali lignin in petroleum industry are summarized in this paper.

8. Lignin and plant disease resistance have a great mutuality, and cell wall lignification is an important mechanism to wheat slow rusting.

9. The relationship between lignin content and relative absorptivity of IR - spectra of korean pine are studied.

10. Synthesis of cationic lignin flocculant by Lignin, epichlorohydrin and trimethylamine was obtained.

11. Horseradish peroxidase catalyzed the copolymerization of lignin with cresol in the reversed micellar system.

12. Lignin of rice husk was extracted by the high boiling point solvent(HBS) digesting process with aqueous solvent of ethanediol.

13. Lignin and small amounts of un - hydrolyzed cellulose and hemi - cellulose are the residues of sawdust hydrolysis.

14. Lignin obtained from desulfonation of black liquor, had high purity, high molecular weight, good-heat stability and plasticity through the analyses of IR spectrum, GPC, TG-DSC and Torque curve.

15. Hydroxyalkyal lignin was synthesized from alkali lignin with propylene oxide. Then it was epoxied by epichlorohydrin catalyzed via boron trifluoride etherate to form lignin based epoxy resin.

16. Synthetic methods of vanillin include o-methoxyphenol method, lignin method, safrole method, eugenol method, methyl hydroxybenzene method and microbial method.

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17. Substances such as lignin, phytoalexin, active oxygen, salicylic acid are known to play important roles on the plant disease resistance.

18. A new method of rapidly quantitatively analyze trace lignin in flax fiber by turbidimetry was proposed in this paper.

19. Of particular interest are genes that reduce the amount of a substance called lignin, or that weaken lignin's chemical structure.

20. Thus, cotton consists of cellulose; and so does wood, though wood is toughened with lignin.

21. The effects of oxiammonolyzation by hydroperoxide on the main functional groups of wheat straw alkaline lignin were studied.

22. The results showed that carbonyl groups in degradation products obviously increased and quinoid matters were produced when dioxane lignin reacted with hydrogen peroxide.

23. Kerogen is the leftover material of sporopollen element and lignin in original bodies in different thermal metamorphic period and it is the original material of gas-oil formation.

24. The occurrence of CONH2 connection chain weakened originally-possessed net structure of the lignin, so the outcome after connection shows better adsorption ability than before reaction.

25. The Casparian strip in roots and some stems contains suberin, lignin, or similar substances.

26. Hemp retting by high temperature boiling, followed by pectase treatment can remove hemicellulose and lignin by 83.3% and 79.2%, respectively.

27. Although aromatic rings were not changed very much, side chains of lignin such as carbonyl groups, CH_2, syringic units and guaiacyl units were partly degraded.

28. While the precipitation is washed, dried activity and low ash content lignin is acquired.

29. Results show that sawdust of black wattle branches which contains more protein, lignin. pentosan, starch, P and Ca etc. than the ordinary mixed sawdust is a good substrate.

30. The ultraviolet spectrum was used in identifying quantificationally the lignin, identifying some special function group and mensurating the acute changes after the chemical treatment.