Ulvan and Ulva oligosaccharides: a systematic review of structure, preparation, biological activities and applications

Abstract Ulva is one of the main green algae causing tide disasters. Ulvan primarily component polysaccharide cell wall and its complex structure monosaccharide composition resulted in various biological activities. However, high-value effective utilization extracted ulvan have been obstructed by limitations ranging from large molecular weight low solubility to poor bioavailability. oligosaccharide obtained degrading can not only ideally retain activities very well but also effectively solve problems The preparation activity studies oligosaccharides become a hot spot field marine resources development research. At present, comprehensive reviews are still scarce. What overviewed this paper chemical composition, structure, extraction, purification oligosaccharides, where research progress on summarized prospected. A theoretical practical basis has provided for further as resources. Graphical