hemicellulose


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Related to hemicellulose: pectin

hem·i·cel·lu·lose

 (hĕm′ĭ-sĕl′yə-lōs′, -lōz′)
n.
Any of several branched polysaccharides that are composed of a variety of different monosaccharides and form a matrix with cellulose and lignin or pectin in plant cell walls. It is produced commercially from corn fiber.

hemicellulose

(ˌhɛmɪˈsɛljʊˌləʊz)
n
(Botany) any of a group of plant polysaccharides that occur chiefly in the cell wall

hem•i•cel•lu•lose

(ˌhɛm ɪˈsɛl yəˌloʊs)

n.
any of a group of polysaccharides, intermediate in complexity between sugar and cellulose, that hydrolyze to monosaccharides more readily than cellulose.
[1890–95]
References in periodicals archive ?
3D) is assigned to the combination of CH stretching and CH bending vibration mode in hemicellulose. A shift in the peak position towards the higher wavelength region takes place on increasing the temperature.
The change of intensity of absorption peaks at specific wave numbers of the characteristic C=O stretching vibration of the carboxyl groups of hemicellulose and chromophores (1730 [cm.sup.-1]), the C=C stretching vibration in aromatic ring of lignin (1450, 1505 [cm.sup.-1]), and the OH in-plane deformation/CH bending vibration of cellulose and hemicellulose (1370, 1330 [cm.sup.-1]) provide indication about the chemical changes on the wooden surface during light exposure.
Insoluble fiber contains cellulose, hemicellulose and lignin and cannot be dissolved in water, unlike soluble fiber.
But most of the energy is converted not into sugars and starches but into cellulose, hemicellulose and lignin.
The rigid cell wall has a complex structure built from three polymers: cellulose, hemicellulose, and lignin.
Analysis of recycled (100 percent), partially recycled (40 percent), and non-recycled (0 percent) substrate completed in conjunction with the Mycology Department at Montana State University showed higher levels of nitrogen and lower levels of cellulose and hemicellulose in the recycled material, resulting in lower C/N ratios.
On the other hand, hemicellulose and (to some extent) pectin are the primary components of the binding substance of the elementary bast fibres, while lignin plays the part of a stabiliser and screen for other fibrogenous substances.
said they have established the process to efficiently make ethanol fuel from cellulose and hemicellulose in soft biomass, including inedible leaves and stalks of plants.
Researchers identified 93 genes associated with the production of cellulose, hemicellulose and lignin, the building blocks of plant cell walls.
Current technology allows fermentation inhibitors, collaterally formed primarily during the process of separating cellulose and hemicellulose from soft-biomass, to interfere with the function of microorganisms that convert sugar into alcohol, leading to extremely low ethanol yield.
THE EUROPEAN Union (EU) Council of Ministers has approved seven new additives as safe to use in EU foodstuffs: erythritol, soybean hemicellulose, ethyl cellulose, hexylresorcinol, tertiary butyl hydroquinone (TBHQ), pullulan, and starch aluminium octenyl succinate.