Natural adhesive which binds wood fibres together in the tree and imparts rigidity Pulp brightness depends on the amount of lignin remaining in the pulp
Substance in trees that holds cellulose fibers together Free sheet has most lignin removed; groundwood paper contains lignin
Complex oxygen-containing organic compound, a mixture of polymers of poorly known structure. After cellulose, it is the most abundant organic material on Earth, making up one-fourth to one-third of the dry weight of wood, where it is concentrated in the cell walls. Removed from wood pulp in the manufacture of paper, it is used as a binder in particleboard and similar products and as a soil conditioner, filler in certain plastics, adhesive ingredient, and raw material for chemicals including dimethyl sulfoxide and vanillin (synthetic vanilla flavouring)
a hard substance embedded in the cellulose of plant cell walls that provides support
Hard material is cellulose plant cell walls used for support in terrestrial plants
Substance in trees that holds cellulose fibres together Free sheet has most lignin removed; groundwood paper contains lignin
A compound contained in the woody cell walls of trees which gives paper a brown color It is usually removed from wood pulp for fine or bleached paper products
an amorphous polymer related to cellulose that cements cell walls, helping them stay rigid Lignin is highly resistant to decomposition
A substance characterizing wood cells and differing from cellulose in its conduct with certain chemical reagents
In wood anatomy, as distinguished from cellulose the second most abundant constituent of wood, located principally in the middle lamella, which is the thin, cementing layer between the wood cells
A compound that "glues" cellulose fibers together in trees Lignin adds opacity to papers, but it also reduces brightness and whiteness
A polymeric material largely responsible for the strength of wood, and making up 16-34% of wood Its nature is not fully understood, but it is considered to be a complex cross-linked, highly aromatic structure of high molecular weight which is readily oxidized It is not a compound but a system, and its composition varies It is more or less completely removed during chemical pulping, and further removed by bleaching A spot test for detection of lignin or groundwood is described in Appendix F of "Fiber Analysis of Paper and Paperboard," T 401 om-82 Like the Barrow spot test for groundwood, it uses phloroglucinol, and cannot detect very small amounts
{i} complex polymer which combines with cellulose to form the woody cell walls of plants (Biology)
Lignin is a substance related to cellulose that provides rigidity and together with cellulose forms the woody cell walls of plants and the cementing material between them
A component of the cell walls of plants that occurs naturally, along with cellulose Lignin is largely responsible for the strength and rigidity of plants, but its presence in paper is believed to contribute to chemical degradation To a large extent, Lignin can be removed during manufacturing
The noncarbohydrate portion of the cell wall of plants It is removed from wood fiber during the pulp manufacturing process, leaving cellulose for papermaking Lignin by-products have found important uses as dispersing agents, oil well drilling mud additives and as a commercial source of vanillin
a complex polymer; the chief non-carbohydrate constituent of wood; binds to cellulose fibers to harden and strengthen cell walls of plants
Phenolic compounds impregnating and strengthening cell walls Xylem cells and fibers are typically lignified but other cells in the stele or cortex can also be lignified