The Chemistry of Dietary Fiber

Southgate, D. A. T.

doi:10.1007/978-1-4684-2241-2_2

Cited by 35 publications

(8 citation statements)

References 112 publications

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“…Water-holding capacity (WHC) is defined as the amount of water that can be taken up by a unit weight of dry dietary fiber and is the point at which there is no free water (Southgate, 1976). It is essential to state exactly how the fiber was prepared and under what conditions the water-holding capacity was determined.…”

Section: Water-holding Capacity Of Hemicelluloses and Cellulosementioning

confidence: 99%

Isolation and Characterization of Hemicellulose and Cellulose from Sugar Beet Pulp

Wen¹,

Chang²,

Brown³

et al. 1988

Journal of Food Science

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Various conditions for the extraction of hemicellulose and cellulose from sugar beet pulp were examined, including pulp particle size, temperature of EDTA extraction, temperature and concentration of alkaline extraction, and delignification time. A procedure using 60 mesh pulp, 85°C EDTA extr&ion of pectins, 10% NaOH extraction at 25°C followed by one hour delignification gave the highest yields. Molecular weights of hemicellulose ranged from 40,000 to 150,000 daltons for the A form and 10,000 to 150,000 daltons for the B form. The monosaccharide composition of hemicellulose A and B differed significantly. Hemicellulose B had the highest water-holding capacity followed by hemicellulose A and cellulose. Viscositv of the hemicelluloses was very low.

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Section: Water-holding Capacity Of Hemicelluloses and Cellulosementioning

confidence: 99%

Isolation and Characterization of Hemicellulose and Cellulose from Sugar Beet Pulp

Wen¹,

Chang²,

Brown³

et al. 1988

Journal of Food Science

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“…Alginic acid is a water-soluble dietary fiber of good quality (Southgate, 1976), and is obtained from brown seaweeds such as Laminariajaponica Areschoug and Undariapinnatifida Suringar. This is of particular interest in Japan as these species have been used as food here since ancient times.…”

Section: Introductionmentioning

confidence: 99%

Effects of alginates on the ingestion and excretion of cholesterol in the rat

1993

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The effects of three forms of alginate (free acid, sodium and calcium salts) on ingestion and excretion of cholesterol in the rat were studied. For two weeks, Male Sprague-Dawley rats were fed a cholesterolrich diet containing 3 % alginate from the brown alga Ascophyllum nodosum. The food efficiency of the three types of alginate was: Na-alginate > Ca-alginate > alginic acid. A significant increase in the weight of cecum was also observed in alginate diets. Alginate was not effective in preventing the elevation of serum total cholesterol levels, although irregularly changing patterns were observed. The cholesterol level of liver showed a tendency to decrease with alginate feeding, while fecal excretion of cholesterol increased.

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“…'Dietary fibre' is usually defined as the part of the diet which is resistant to human digestive * To whom correspondence should be addressed. enzymes; it is composed mainly of the structural polymers of the plant cell wall, ie cellulose, hemicelluloses, pectins and lignin (Southgate 1976;Trowel1 1976).…”

Section: Introductionmentioning

confidence: 99%

“…enzymes; it is composed mainly of the structural polymers of the plant cell wall, ie cellulose, hemicelluloses, pectins and lignin (Southgate 1976;Trowel1 1976).…”

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confidence: 99%

Structure and properties of sugar beet fibres

Bertin¹,

Rouau²,

Thibault³

1988

J Sci Food Agric

112

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Fibrous fractions were prepared from sugar beet pulp (RF) by sequential extractions with potassium oxalate, 0.05 M hydrochloric acid at 85°C and 0.05 M sodium hydroxide at 4°C. The overall composition, polysaccharide structure and some physico-chemical properties (cation exchange capacity, CEC; water holding capacity, W H C ; swelling) of each fraction were determined. RF was mostly composed of carbohydrates (66.3 %) with minor amounts of ash, proteins and lignin. The main polysaccharides were highly methylated and acetylated pectins, cellulose and arabinans. The oxalate residue (82.1 % of RF) exhibited only minute differences from RF whereas the acidic and alkaline residues,accounting for 42.8 %and 35.5 % of RF, respectively, were enriched in cellulose and hemicelluloses (xylans, xyloglucans, mannans) and mostly devoid of pectins and arabinans. CEC and WHC of fractions were closely related to the content of unmethylated galacturonic acid residues. The influence of the ionic form of ionisable groups was demonstrated, the Na' form giving the highest WHC. The ionic strength of the medium can reduce the WHC, especially in the case of the acid-and alkali-extracted fibres.

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The Chemistry of Dietary Fiber

Cited by 35 publications

References 112 publications

Isolation and Characterization of Hemicellulose and Cellulose from Sugar Beet Pulp

Isolation and Characterization of Hemicellulose and Cellulose from Sugar Beet Pulp

Effects of alginates on the ingestion and excretion of cholesterol in the rat

Structure and properties of sugar beet fibres

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