Extraction of water-soluble xylan from wheat bran and utilization of enzymatically produced xylooligosaccharides by Lactobacillus, Bifidobacterium and Weissella spp.

Production of arabinoxylan-oligosaccharide mixtures of varying composition from rye bran by a combination of process conditions and type of xylanase

“…Heat pretreatment is performed in a pressure vessel using water or steam and has been applied in many cases to isolate AX or make (A)XOS from different lignocellulose materials, such as barley husks (Roos et al, 2009). Wheat bran materials (Immerzeel et al, 2014;SchooneveldBergmans and Hopman, 1998) have also been used. The temperature and time have an impact on the DP and DS of the extracted AX or (A)XOS, which means that these parameters can be set to obtain the most desired properties (Roos et al, 2009).…”

“…Combining a mild heat pretreatment with a xylanase treatment is attractive because it allows a more controlled hydrolysis of the water-solubilized AX. A harsher pretreatment might result in a high content of monosaccharides and loss of arabinose substituents as seen in a study using wheat bran to extract xylan (Immerzeel et al, 2014). A mild heat pretreatment also limits the formation of byproducts such as furfurals, the formation of which is very temperature dependent (Kataoka et al, 2008).…”

“…Use of thermostable xylanases for (A)XOS production is beneficial, as the temperature from the heat pretreatment can be maintained in the following hydrolysis step. Immerzeel et al (2014) showed that a family 10 xylanase from the marine bacterium Rhodothermus marinus (RmXyn10A) was able to hydrolyze AX from heat pretreated wheat bran at a high temperature, resulting in a mixture of XOS and AXOS.…”

Prebiotic compounds from agro‐industrial by‐products

“…In this sense, XOS from wheat straw xylan yielded 36% of XOS, and the ratio of X3/X3 increased with higher temperatures (Faryar et al, ). XOS from wheat bran xylan yielded 59% at 185°C and 10 min of residence time (Immerzeel et al, ). Xylan extracted from wheat straw and rice straw by dilute alkali extraction method yielded up to 7.06 and 3.45 mg/ml of XOS from wheat straw and rice straw, respectively.…”

“…adolescentis , and Weissella spp. (Immerzeel et al, ). Likewise, another work showed that Bacillus adolescentis and B .…”