The role of bioconversion processes to enhance bioaccessibility of polyphenols in rice

Bound Polyphenols from Insoluble Dietary Fiber of Defatted Rice Bran by Solid-State Fermentation with Trichoderma viride: Profile, Activity, and Release Mechanism

“…In addition, a notable finding was the presence of deferulic acid ( m / z 385.0941) and dehydrotriferulic acid ( m / z 577.1373) in FT-IDF-RBP. In the existing literature, we found that ferulic acid from grains was the major components of BP, and it was bound to lignin and hemicellulose through ester bond. , As a consequence, the existence of deferulic acid and dehydrotriferulic acid verified the feasibility of releasing BP via SSF.…”

“…Currently, traditional methods for releasing BP were acid hydrolysis, alkaline hydrolysis and enzymatic hydrolysis . The interaction forces between BP and IDF contained hydrogen bond, hydrophobic interaction and covalent bond . On the basis of the previous literature, alkaline hydrolysis was to open and rearrange the structure of phenol ring through chemical way, which could crack the ether bond together with ester bond .…”

Untargeted Metabolomics of Korean Fermented Brown Rice Using UHPLC Q-TOF MS/MS Reveal an Abundance of Potential Dietary Antioxidative and Stress-Reducing Compounds

“…Enzymes produced in these processes (hydrolyzing enzymes) or biological process enzymes can break down the bound bioactive compounds or the linkages between the cell wall components [ 10 ]. Lactic acid bacteria have been involved in fermenting food materials for a long time, to release polyphenols or bioactive compounds [ 11 ]. Moreover, germination also activates many dormant enzymes which induce the degradation of molecules by synthesis and respiration of new constituents of cells [ 11 ].…”

“…Lactic acid bacteria have been involved in fermenting food materials for a long time, to release polyphenols or bioactive compounds [ 11 ]. Moreover, germination also activates many dormant enzymes which induce the degradation of molecules by synthesis and respiration of new constituents of cells [ 11 ]. The potential antioxidant and beneficial properties of health-associated phenolic compounds found in brown rice varieties make them potential targets for functional food markets.…”

Mixed solid-state fermentation for releasing bound polyphenols from insoluble dietary fiber in carrots via Trichoderma viride and Aspergillus niger

“…3 Macromolecules in the food matrix, such as insoluble dietary fiber (IDF), are often associated with BP through ester and ether covalent bonds, hydrophobic bonds, and/or hydrogen interactions. 4 Hence, methods for the release of BP have received considerable attention. Based on our previous study, the release of BP from carrot dietary fibre by alkali reached 33.03 mg per 10 g. 5 However, Arranz et al found that alkali hydrolysis usually hydrolyses the ester bonds linking BP to dietary fibre, resulting in the release of only some BP, and thus lower yields.…”