نتایج جستجو برای: arabinoxylans
تعداد نتایج: 205 فیلتر نتایج به سال:
The enzymatic degradation of plant cell walls plays a central role in the carbon cycle and is of increasing environmental and industrial significance. The enzymes that catalyze this process include xylanases that degrade xylan, a β-1,4-xylose polymer that is decorated with various sugars. Although xylanases efficiently hydrolyze unsubstituted xylans, these enzymes are unable to access highly de...
Many human diets contain arabinoxylan, and the ease of genome sequencing coupled with reduced cost have led to unraveling the arsenal of genes utilized by the colonic Bacteroidetes to depolymerize this polysaccharide. The colonic Bacteroidetes with potential to ferment arabinoxylans include Bacteroides intestinalis. In this study, we analyzed the hydrolytic activities of members of a xylan degr...
Grass lignins contain substantial amounts of p-coumarate (pCA) that acylate the side-chains of the phenylpropanoid polymer backbone. An acyltransferase, named p-coumaroyl-CoA:monolignol transferase (OsPMT), that could acylate monolignols with pCA in vitro was recently identified from rice. In planta, such monolignol-pCA conjugates become incorporated into lignin via oxidative radical coupling, ...
Arabinoxylans and glutenins are two critical network-forming polymeric components of wheat flours, functionally related to mixing and baking performance and baked goods quality. For soft wheat flour applications, solvent-accessible arabinoxylans (pentosans) play a dominant role in both sweet and savory products. Solvent retention capacity (SRC) testing (Approved Method 5611, AACC International ...
This article summarizes evolving concepts and scientific findings on cell wall feruloylation ferulate oxidative coupling processes in grasses, the effects these have wide range of properties consequent plant responses to biotic abiotic stress tissue degradability. Updates different strategies that been applied genetically modifying are presented. Special emphasis is given modification by hetero...
Plant cell wall polysaccharides are partially cross-linked via phenolic compounds. As shown in the past, the most important phenolic compounds to cross-link plant cell-wall polysaccharides are ester-linked ferulic acid dimers, but p-coumarate dimers were also shown to be potential cross-linking compounds. Recently, ferulic acid dimers were identified and quantified in a range of cereal grains. ...
Two-stage treatments of sugarcane bagasse with steam and alkaline peroxide were performed and the hemicelluloses extracted were characterized by chemical methods, SEC-MALLS, FT-IR and 13C NMR. The hemicellulose from steam pretreatment was found to contain galacto-arabinoxylans while alkaline peroxide extraction yielded predominately linear arabinoxylans.The present studyshowed a promising seque...
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