Inulin


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inulin

[′in·yə·lən]
(biochemistry)
A polysaccharide made up of polymerized fructofuranose units.

Inulin

 

(C6H10O5), an organic substance of the polysaccharide group, a D-fructose polymer. It is a white powder, readily soluble in hot water and poorly soluble in cold. Sweet-tasting, it has a molecular weight of 5,000–6,000. Its structural formula is

During hydrolysis, inulin forms D-fructose and a small quantity of glucose in the presence of acids and the enzyme inulase. Inulin and the intermediate products of its fermentative decomposition, that is, inulides, do not have reducing properties. An inulin molecule comprises a chain of 30–36 fructose radicals in furanose form. Like starch, inulin serves as a reserve carbohydrate and occurs in many plants, primarily in the family Compositae as well as in the families Campanulaceae, Liliaceae, Lobeliaceae, and Violaceae. The inulin content reaches 10–12 percent in the tubers and roots of the dahlia, narcissus, hyacinth, tuberose, chicory, and Jerusalem artichoke. Related carbohydrates (pseudoinulin, inulenin, levulin, helianthin, sinistrin, irisin) are nearly always found with inulin in plants; these carbohydrates yield D-fructose upon hydrolysis as does inulin.

Inulin is extracted from chicory or from the Jerusalem artichoke. It is readily assimilated by the human body and is there fore used in medicine as a starch and sugar substitute in diabetes mellitus. Inulin also serves as the starting material for the commercial preparation of fructose.

References in periodicals archive ?
Inulin is a soluble fibre, which has the same effect on the body as fibres from fruits, vegetables, wholesome breads and cereals.
Inulin can be used to replace sugar, fat and flour.
Studies have shown that consuming 8 grams per day of inulin (a natural dietary fiber) increases calcium absorption.
In experiments, the researchers substituted inulin, brown sorghum bran and flaxseed in bread individually at 5% and 10% concentrations and in 50-50 combinations.
The company has two specific product groups, Raftiline inulin and Raftilose oligofructose, which are relevant to the nutraceuticals market.
Yogurts made with a FOS of from DP 3 to DP 5 and inulin had significantly less syneresis than the control.
Along with marketing inulin derivatives-based products for industrial applications, Solutia has agreed to support Cosun's technology with ongoing research and development activity, Verspeek said.
RAFTILINE[R] HP (high performance), a patented form of chicory inulin from which the monosaccharides, disaccharides and oligosaccharides have been removed
In further tests, a total of 60 overweight volunteers took part in a 24-week study in which half were given IPE as a powder to add to their food and half given inulin.
Due to its emulsifying and film-forming properties, the use of acacia gum, in combination with maltodextrin or inulin, made it possible to obtain more stable initial emulsions with a controlled size distribution, about 2 [micro]m, monodispersed.
Different studies indicated diet containing Inulin and Fructooligosaccharides stimulates the growth of bifidobacteria and Lactobacillus and it selectively prevents growth of pathogen microorganisms especially Fusobacterium and Clostridium [5].
The natural prebiotics inulin and fructooligosaccharides (FOS) occur in more than 36,000 species of the world's flora.