Botany: General

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lignin

The Columbia Encyclopedia, 6th ed. | 2011 | Copyright

lignin , a highly polymerized and complex chemical compound especially common in woody plants. The cellulose walls of the wood become impregnated with lignin, a process called lignification, which greatly increases the strength and hardness of the cell and gives the necessary rigidity to the tree. It is essential to woody plants in order that they stand erect.

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lignin

A Dictionary of Plant Sciences | 1998 | | Copyright

lignin A complex, cross-linked polymer, comprising phenyl propene units, that is found in many plant-cell walls. Its function appears to be to cement together and anchor cellulose fibres and to stiffen the cell wall. Lignin reduces infection, rot, and decay. It is among the most chemically inert of plant substances and survives in fossils of woody stems.

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MICHAEL ALLABY. "lignin." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "lignin." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O7-lignin.html

MICHAEL ALLABY. "lignin." A Dictionary of Plant Sciences. 1998. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-lignin.html

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lignin

World Encyclopedia | 2005 | Copyright

lignin Complex, non-carbohydrate substance that occurs in woody tissues (especially xylem of plants), often in combination with cellulose. It is lignin that gives wood its strength. To obtain pure cellulose for the paper and rayon industries, the lignin has to be removed from wood.

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"lignin." World Encyclopedia. 2005. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O142-lignin.html

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lignin

A Dictionary of Food and Nutrition | 2005 | | Copyright

lignin (Or lignocellulose); indigestible part of the cell wall of plants (a polymer of aromatic alcohols). It is included in measurement of dietary fibre, but not of non‐starch polysaccharide.

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DAVID A. BENDER. "lignin." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

DAVID A. BENDER. "lignin." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O39-lignin.html

DAVID A. BENDER. "lignin." A Dictionary of Food and Nutrition. 2005. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O39-lignin.html

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lignin

A Dictionary of Biology | 2004 | Copyright

lignin A complex organic polymer that is deposited within the cellulose of plant cell walls during secondary thickening. Lignification makes the walls woody and therefore rigid. See sclerenchyma.

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"lignin." A Dictionary of Biology. 2004. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

"lignin." A Dictionary of Biology. 2004. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O6-lignin.html

"lignin." A Dictionary of Biology. 2004. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-lignin.html

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lignin

The Oxford Pocket Dictionary of Current English | 2009 | Copyright

lig·nin / ˈlignin/ • n. Bot. a complex organic polymer deposited in the cell walls of many plants, making them rigid and woody.

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"lignin." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

"lignin." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O999-lignin.html

"lignin." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-lignin.html

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Free newspaper and magazine articles

	Lignin-modified phenol-formaldehyde resin development for fiberboard. Magazine article from: Forest Products Journal; 9/1/2004
	Lignin's use in biochemicals examined.(us newslines) Magazine article from: Urethanes Technology International; 12/1/2010
	Lignin: Properties and Materials. Magazine article from: Chemistry and Industry; 2/5/1990