Anion Exchange Resins Bambusa 1 Chromatography, Ion Exchange 1 FOS 1 Gastric Juice 1 Humans 1 Molecular Weight 1 Optical density 1 Polysaccharides 1 Prebiotics 1 Probiotics 1 Spectroscopy, Fourier Transform Infrared 1 anion exchange resin 1 article 1 chemistry 1 human 1 infrared spectroscopy 1 ion exchange chromatography 1 isolation and purification 1 molecular weight 1 polysaccharide 1 prebiotic agent 1 stomach juice 1