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Qu'est-ce (qui) est Lignin - définition
FAMILY OF PHENOLIC BIOPOLYMERS
Lignified; Lingin; Lignification; Lignins; Lignin biosynthesis; Lignine
![Polymerisation of [[coniferyl alcohol]] to lignin. The reaction has two alternative routes [[catalysed]] by two different oxidative enzymes, [[peroxidase]]s or [[oxidase]]s.](https://commons.wikimedia.org/wiki/Special:FilePath/LigninPolymerisation.png?width=200 "Polymerisation of [[coniferyl alcohol]] to lignin. The reaction has two alternative routes [[catalysed]] by two different oxidative enzymes, [[peroxidase]]s or [[oxidase]]s.")
![The three common monolignols: H, [[paracoumaryl alcohol]] (1), G, [[coniferyl alcohol]] (2) and S, [[sinapyl alcohol]] (3)](https://commons.wikimedia.org/wiki/Special:FilePath/Monolignols general.svg?width=200 "The three common monolignols: H, [[paracoumaryl alcohol]] (1), G, [[coniferyl alcohol]] (2) and S, [[sinapyl alcohol]] (3)")
Lignin
·noun A substance characterizing wood cells and differing from cellulose in its conduct with certain chemical reagents.
lignified
adjective Botany make rigid and woody by the deposition of lignin in cell walls.
Wikipédia
Lignin
Lignin is a class of complex organic polymers that form key structural materials in the support tissues of most plants. Lignins are particularly important in the formation of cell walls, especially in wood and bark, because they lend rigidity and do not rot easily. Chemically, lignins are polymers made by cross-linking phenolic precursors.
Exemples du corpus de texte pour Lignin
1. Enzymes can be used to remove the melanin deposits, but because melanin is basically lignin, removing it destroys the lignin in the paper.
2. The difficulty for scientists is that modern recycled paper has a high lignin acid content, and will rot over time.
3. Knowing which fungus is to blame could help, because different strains might target the fungal melanin and ignore the lignin in the paper.
4. It contains 40 sorts of microelements and more than '0 kinds of natural elements including essential amino acid, vitamins C, B1, B2, E, PP and K, protein, lignin, chlorophyll, essential oil, oligosaccharide and polysaccharide.
5. Mandel believes that due to the cold weather, the tree has acquired complex lignin, which makes it strong, and the branch did not need to be sawed off at all.