Isolation and characterization of high molar mass water-soluble arabinoxylans from barley and barley malt

Improved efficiency of brewer’s spent grain arabinoxylans by ultrasound-assisted extraction

“…AX extracted with water showed a higher Xyl total /t-Xyl, which is in accordance with Dervilly et al [28] for barley and Mandalari et al [6] for BSG. This type of AX has been correlated with higher prebiotic activity, however the high quantity of starch in these extracts and the high costs associated with its removal could hinder the application of these extracts as prebiotics.…”

“…The presence of 3-Galp, 6-Galp and 3,6-Galp simultaneously with 2-Araf and 3,5-Araf suggests the presence of a residual type II arabinogalactans (AG). Residual AG have also been reported in literature in barley and barley malt [28].…”

“…The arabinoxylans content in the final extracts were calculated from the sum of total arabinose and total xylose quantified by methylation analysis, after correction for the presence of arabinogalactans (AG), assuming an arabinose to galactose ratio of 0.7 [28].…”

Screening of filamentous fungi for production of enzymes of biotechnological interest

“…These enzymes release lignin fragments by hydrolyzing residual xylan and the pretreatment with xylanase reduces the usage of chlorine as the bleaching agent. Not less important is the use of xylanases for bread-making and beer production (13,14). On the other hand, in the industry of animal feed, the xylanases can be added to the ration increasing the intestinal absorption of nutrients (15).…”

Brewing with fractionated barley

“…This fraction might contain the testa, which contains a lot of proanthocyanidins. Also the arabinoxylans are mostly present in the outer fractions, which is in line with previous studies (Dervilly et al, 2002;Oscarsson, Andersson, Salomonsson, & Åman, 1996). The β-amylase activity was mostly present in the endosperm, and its activity was very low in the outer 10% of the husk.…”