Variation in the composition of water-soluble polysaccharides in flaxseed.

Abstract

One hundred and nine accessions of flaxseed (Linum usitatissimum L.) from twelve geographical regions and including oil, fiber, and brown-and yellow-seeded types were used to determine the composition of water-soluble polysaccharides, total carbohydrates, protein, and oil. The content of water-soluble polysaccharides ranged from 3.6 to 8.0%. Neutral monosaccharides of the watersoluble polysaccharide fraction consisted mainly of glucose, xylose, galactose, and rhamnose. The latter varied 3-fold from 8 to 24% of total monosaccharides, although 92% of the accessions had rhamnose values between 10 and 20%. Fucose was a minor component of the water-soluble polysaccharide fraction and displayed the highest coefficient of variation. Xylose was the second largest carbohydrate component, and its mean values were highly correlated with cumulative frequency. Variation of galactose content of the water-soluble polysaccharide fraction of flaxseed from all accessions was normally distributed. Glucose concentration ranged from 21 to 40% and represented the major neutral monosaccharide in flaxseed. The ratio of rhamnose to xylose, an indication of the ratio of acidic t o neutral polysaccharides, ranged from 0.3 to 2.2. Carbohydrate yield and sugar contents of the water-soluble polysaccharide fraction of flaxseed accessions were independent of protein and oil content. Flaxseed accessions, when grouped by geographical region or type, can be differentiated by principal component analysis.

Effects of drying methods on rheological properties of flaxseed gum

“…The influences of concentration, pH, temperature, electrolyte conditions, extraction conditions, and mixing with starch on the rheological properties of flaxseed were investigated extensively using both small amplitude oscillatory and continuous shear measurements (Cui, Mazza, & Biliaderis, 1994a;Cui, Mazza, Oomah, & Biliaderis, 1994b;Mazza & Biliaderis, 1989;Oomah, Kenaschuk, Cui, & Mazza, 1995;Wang et al, 2008). Flaxseed gum has been extracted and dried by many methods.…”

Effect of flaxseed processing on its true metabolizable energy values for adult chicken

“…Flaxseed contains 3.6-8% water-soluble polysaccharides. 6 This amount is significantly higher than that reported in some cereal and oilseeds, which is known to affect nutrient utilization for broilers. 7 Flaxseed processing, such as grinding and pelleting with other diet ingredients, had been shown to have a beneficial effect on its ME values.…”

Acute toxicity study of a polysaccharide based hydrogel from linseed for potential use in drug delivery system

“…Flaxseeds/linseeds are the rich source of oil, protein and carbohydrates and have many applications in food industry (Oomah, 2001). Linseed is rich in polysaccharides which are present in the seed coat and mainly composed of rhamnogalacturonan and arabinoxylan (Oomah et al, 1995;Qian et al, 2012). Linseed polysaccharides can be easily separated using hot water extraction method .…”