Structure and physicochemical properties of barley non-starch polysaccharides—II. Alkaliextractable β-glucans and arabinoxylans

Comparative characterization of degraded and non-degradative hemicelluloses from barley straw and maize stems: Composition, structure, and thermal properties

“…Apparently, the alkalinesoluble hemicelluloses were the major fraction, comprising 25.8% and 45.6% of the total released hemicellulosic polymers from barley straw and maize stems, respectively. It is believed that hydroxyl ions cause swelling of cellulose, disruption of hydrogen bonds between cellulose and hemicelluloses, and hydrolysis of ester bonds most likely connecting cell wall polysaccharides, resulting in the solubilization of substantial amounts of hemicelluloses (Izydorczyk, Macri, & MacGregor, 1998). It is worth noting that the unextracted residues left after the sequential extractions consisted mainly of cellulosic material, and accounted for 38.3% from barley straw and 37.5% from maize stems.…”

Evaluation of baking procedures for incorporation of barley roller milling fractions containing high levels of dietary fibre into bread

“…CDC Candle) according to the methodology used by Izydorczyk et al 64 The ground grain was refluxed with 85% ethanol to eliminate the endogenous enzymes. Barley grist was mixed with water at 45…”

Xylan and xylan derivatives - biopolymers with valuable properties, 1. Naturally occurring xylans structures, isolation procedures and properties

“…In the last decade, many detailed structural characteristics of ws-and wis-AXs of various cereal grains of commerce (wheat, rye, barley, and oat) have been reported 6,7,[26][27][28] . In particular, attention has been paid to the water-unextractable AX 29,30) , which have similar but stronger bread improving properties than their waterextractable counterparts.…”

“…The physicochemical properties of xylans have not been studied systematically but in connection with certain technological problems in milling 114) , bread-making 6,7,115) , and other applications of cereal grains and flours 116) , and in connection with the influence of xylans on the properties of pulps prepared from hardwoods and softwoods 117,118) .…”

“…The molecular weight distribution (MWD) of xylans is usually determined by size exclusion chromatography (SEC) using dextran, pullulan or polystyrene standards for calibration 116,131,132) or by coupling of SEC with LS and viscometry 32,127,133) . High-performance SEC using 0.5 M NaOH as eluant gave a valid universal calibration between dextran and hardwood GXs and a Mark-Houwink equation for GXs in this solvent, [g] = 2.67 6 10 -4 m 0.…”