Biological activities of chitosan and chitooligosaccharides

Chitooligosaccharide Prolongs Vase Life of Cut Roses by Decreasing Reactive Oxygen Species

“…The site of the nick was very easy to multiply many kinds of bacteria and fungi owe to the liquid contained anorganic ion, small peptide, polysaccharide and so on. It's well known that the COS is against the common bacteria, molds and yeasts (Joodi et al, 2011;Fang et al, 2013) connected with content of protonated amino group and relative molecular weight (Xia et al, 2011). Accordingly, COS improved the absorption of water in cut roses (Table 2) and increased the fresh weight (Table 3), flower morphology (Fig.…”

“…However, there is no obvious difference between chitosan and Chitin. Although COS, as a preservative, was applied in apple juice, and prolonged the juice storage period at 37°C from nine days to 70 days (Xia et al, 2011). In the paper, it is reported that COS prominently prolonged the vase life 6.4 days and markedly improved the ornamental quality of cut roses (Table 1 and Fig.…”

“…Many nonspecific enzymes, namely, cellulases, lipases and proteases, or specific enzymes chitosanases, have been used to prepare COS (Thadathil and Velappan 2014). The 10 kDa or less COS have been found lots of biological activities owe to their structures and physicochemical properties (Xia et al, 2011), such as hypocholesterolemic (Kim and Rajapakse, 2005), antimicrobial Kim, 2000, 2001), immunity-enhancing and anticancer effects (Xia et al, 2011), accelerating calcium and iron absorption (Bravo-Osuna et al, 2007), antioxidant (Je et al, 2004;Mendis et al, 2007;Fang et al, 2013) and so on. However, relatively little is known about the effects and mechanism of COS on the vase life of cut roses.…”

Processos de obtenção e caracterização físico-química de quitinas e quitosanas extraídas dos rejeitos da indústria pesqueira da região de Cananéia - SP

“…Entretanto, a extensão da solubilidade da quitosana é dependente do ̅̅̅̅ , da concentração, do tipo de ácido, da massa molar e do pH do meio (Xia et al, 2011;Hussain et al, 2013;Bof et al, 2015).…”

“…Tais aplicações incluem: carreador de fármacos, cura de feridas, pele artificial, excipientes farmacêuticos, suplementos dietéticos, dentre outros (Dumitriu, 2001;Williams, 2001;Xia et al, 2011).…”