Structural features of rice bran hemicellulose

Shibuya, Naoto; Iwasaki, T

doi:10.1016/s0031-9422(00)83538-4

Cited by 96 publications

(44 citation statements)

References 34 publications

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“…Water-soluble larchwood xylan contains a large amount of glucose, probably due to the presence of cellulose. Shibuya and Iwasaki (1985) b Gruppen et al (1992a) Another important substituent is glucopyranosyl uronic acid, which is present in large amounts in both types of birchwood xylan and in the acidic fraction of rice bran arabinoxylan.…”

Section: Sugar and Glycosidic Linkage Compositionmentioning

confidence: 99%

Degradation of different [(glucurono)arabino]xylans by a combination of purified xylan-degrading enzymes

Kormelink¹,

Voragen²

1993

Appl Microbiol Biotechnol

116

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Section: Sugar and Glycosidic Linkage Compositionmentioning

confidence: 99%

Degradation of different [(glucurono)arabino]xylans by a combination of purified xylan-degrading enzymes

Kormelink¹,

Voragen²

1993

Appl Microbiol Biotechnol

116

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“…Rice bran, made up of pericarp, seed coat, aleuronic layer, germ and small portion of starchy endosperm is derived from the outer layer of brown rice (Shibuya and Iwasaki 1984). It is a by-product resulting from the processing of brown rice and constituted 10 % of the entire weight of the rice (Li et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Functional and physiological properties of total, soluble, and insoluble dietary fibres derived from defatted rice bran

Daou¹,

Zhang²

2013

J Food Sci Technol

118

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Enzymatic-gravimetric method was used to obtain three fractions of dietary from defatted rice bran. The functional and physiological properties such as viscosity, cation exchange capacity (CEC), and glucose dialysis retardation index (GDRI), cholesterol and bile salt adsorption capacity of the resultant fractions were evaluated. Insoluble dietary fibre (IDF) and soluble dietary fibre (SDF) when compared showed that SDF exhibited significantly (p <0.05) higher viscosity (2.35 mPa.s), greater GDRI value (17.65 %) at 60 min and significantly lowered concentration of cholesterol at pH 7 (29.90 %, p < 0.05). However IDF showed the highest CEC and its adsorption capacity of bile salt was higher than SDF (18.20 % vs. 13.76 %; p<0.05), while CEC and cholesterol absorption capacity of TDF were similar to SDF. These properties indicate that rice bran soluble, insoluble and total fibres are functional ingredients which can be added to various food products and dietetic, low-calorie high-fiber foods to enhance their nutraceutical properties and health benefits.

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“…Xylan as present in the cell walls of monocotyles (grasses and cereals) consist of linear chains of b-D-(1,4)-linked D-xylopyranosyl residues, which can generally be substituted with a-L-arabinofuranosyl at the 2-O and/or 3-O-position(s) and a-D-glucopyranosyl uronic acid or its 4-O-methyl derivative at the 2-O-position (Brillouet et al, 1982;Carpita, 1996;Shibuya and Iwasaki, 1985). Some publications describe the presence of O-acetyl substituents (Ishii, 1991;Wende and Fry, 1997b).…”

Section: Introductionmentioning

confidence: 99%

Standard assays do not predict the efficiency of commercial cellulase preparations towards plant materials

Kabel

Maarel²,

Klip³

et al. 2005

Biotech & Bioengineering

107

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Commercial cellulase preparations are potentially effective for processing biomass feedstocks in order to obtain bioethanol. In plant cell walls, cellulose fibrils occur in close association with xylans (monocotyls) or xyloglucans (dicotyls). The enzymatic conversion of cellulose/xylans is a complex process involving the concerted action of exo/endocellulases and cellobiases yielding glucose and xylanases yielding xylooligomers and xylose. An overview of commonly measured cellulase-, cellobiase-, and xylanase-activity, using respectively filter paper, cellobiose, and AZCL-dyed xylan as a substrate of 14 commercially available enzyme preparations from several suppliers is presented. In addition to these standardized tests, the enzyme-efficiency of degrading native substrates was studied. Grass and wheat bran were fractionated into a water unsoluble fraction (WUS), which was free of oligosaccharides and starch. Additionally, cellulose- and xylan-rich fractions were prepared by alkaline extraction of the WUS and were enzymatically digested. Hereby, the capability of cellulose and xylan conversion of the commercial enzyme preparations tested was measured. The results obtained showed that there was a large difference in the performance of the fourteen enzyme samples. Comparing all results, it was concluded that the choice of an enzyme preparation is more dependent on the characteristics of the substrate rather than on standard enzyme-activities measured.

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Structural features of rice bran hemicellulose

Cited by 96 publications

References 34 publications

Degradation of different [(glucurono)arabino]xylans by a combination of purified xylan-degrading enzymes

Degradation of different [(glucurono)arabino]xylans by a combination of purified xylan-degrading enzymes

Functional and physiological properties of total, soluble, and insoluble dietary fibres derived from defatted rice bran

Standard assays do not predict the efficiency of commercial cellulase preparations towards plant materials

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