Physical modification of Lepidium perfoliatum seed gum using cold atmospheric-pressure plasma treatment

摘要: Abstract In the present study, cold atmospheric-pressure plasma treatments (5 and 10 kV for 4-20 min) were used modification of Lepidium perfoliatum seed gum (LPSG). The content carbonyl carboxyl groups, as well water-solubility LPSG increased after treatments; however, numbers surface hydroxyl groups decreased when 5kVplasma was used. Molecular weight polydispersity index significantly exposure to air at 5 kV, whereas a significant decrease in molecular increase observed with voltage treatment time. conformation changed more disordered or less ordered form higher Results demonstrated that cleavage C-O-C formation bonds occurred during treatments. elastic components always than viscous one meaning all native modified gums dispersions had weak gel characteristics. However, treated stronger intertwined network gum. Meanwhile, viscoelasticity weaker one. All unmodified LPSGs revealed pseudoplastic flow behavior. samples displayed apparent viscosity, while lower values viscosity achieved kV. Therefore, this study confirms eminent ability means modify modulate food polysaccharides properties.