biostudies-literatureWeng VFundação para a Ciência e Tecnologia e Portugal 2020Fundação para a Ciência e TecnologiaAssociate Laboratory for Green ChemistryLAQV, which is financed by Fundação para a Ciência e Tecnologia5621https://www.ebi.ac.uk/biostudies/studies/S-EPMC10420191biostudies-literatureUnknown28(15)Arabinoxylan has prebiotic properties, as it is able to resist digestion in the small intestine and undergoes fermentation in the large intestine. In this work, arabinoxylan was extracted from corn fiber using an alkaline solution and further purified with membrane processing. It was found that the extracts were mainly composed of xylose (50-52%), arabinose (37-39%), galactose (9%) and glucose (1-4%), with an A/X ratio of 0.72-0.77. All the extracts were composed of phenolic compounds, including ferulic acid derivatives such as dimers, trimers and tetramers. The purified extract had a lower concentration of ferulic and <i>p</i>-coumaric acid (0.004 and 0.02 mg/mg_{dry_weight}, respectively) when compared to raw extract (19.30 and 2.74 mg/mg_{dry_weight}, respectively). The Molecules (Basel, Switzerland)Arabinoxylan from Corn Fiber Obtained through Alkaline Extraction and Membrane Purification: Relating Bioactivities with the Phenolic Compounds.PMC10420191PhD fellowship 2021.08511.BDPortuguese Mass Spectrometry Network (LISBOA-01-0145-FEDER-402-022125)UIDB/50006/2020iNOVA4Health (UIDB/04462/2020 and UIDP/04462/2020) , the Associate Laboratory LS4FUTURE (LA/P/0087/2020) and the individual grant CEECIND/04801/2017 for Ana Teresa SerraCardeira MBronze MRBrazinha CWeng VSerra ATBento-Silva AfalseArabinoxylan from Corn Fiber Obtained through Alkaline Extraction and Membrane Purification: Relating Bioactivities with the Phenolic Compounds.Arabinoxylan has prebiotic properties, as it is able to resist digestion in the small intestine and undergoes fermentation in the large intestine. In this work, arabinoxylan was extracted from corn fiber using an alkaline solution and further purified with membrane processing. It was found that the extracts were mainly composed of xylose (50-52%), arabinose (37-39%), galactose (9%) and glucose (1-4%), with an A/X ratio of 0.72-0.77. All the extracts were composed of phenolic compounds, including ferulic acid derivatives such as dimers, trimers and tetramers. The purified extract had a lower concentration of ferulic and <i>p</i>-coumaric acid (0.004 and 0.02 mg/mg_{dry_weight}, respectively) when compared to raw extract (19.30 and 2.74 mg/mg_{dry_weight}, respectively). The 2023-01-01T00:00:00Z2023 Jul2025-04-04T10:09:28.624Z2025-04-04T10:09:28.624ZS-EPMC104201913757059310.3390/molecules28155621