Jing, Yingjun; Diao, Yujia; Yu, Xueqing published an article on February 28 ,2019. The article was titled 《Free radical-mediated conjugation of chitosan with tannic acid: Characterization and antioxidant capacity》, and you may find the article in Reactive & Functional Polymers.Related Products of 30931-67-0 The information in the text is summarized as follows:
Chitosan (CS) is a natural biopolymer with versatile applications. In this work, CS was functionalized with tannic acid (TA) by a free radical grafting procedure to improve its antioxidant capacity. The resulting TA-conjugated CS (TA-CS) showed a high TA equivalent content of 267.1 ± 5.4 mg TAE/g. The formation of TA-CS was verified by UV-vis, FTIR, and 1H NMR analyses. Moreover, TA-CS showed a lower thermal stability and crystallinity than CS and exhibited a good water-solubility of 15.0 ± 0.3 mg/mL. The DPPH radical scavenging activity of TA-CS reached a maximum of 91.6%, which was 6.4-fold higher than that of CS. Similar results were also observed in ABTS and hydroxyl radical scavenging assays. Moreover, TA-CS showed a higher superoxide radical scavenging activity and ferrous ion chelating activity than both TA and CS. These results suggest that conjugating with TA is an available way to enhance the antioxidant capacity of CS. In the experimental materials used by the author, we found ABTS Diammonium(cas: 30931-67-0Related Products of 30931-67-0)
ABTS Diammonium(cas: 30931-67-0) belongs to anime. Nitrous acid converts secondary amines (aliphatic or aromatic) to N-nitroso compounds (nitrosamines): R2NH + HNO2 → R2N―NO. Some nitrosamines are potent cancer-inducing substances, and their possible formation is a serious consideration when nitrites, which are salts of nitrous acid, are present in foods or pharmaceutical preparations. Tertiary amines give rise to nitrosamines more slowly; an alkyl group is eliminated as an aldehyde or ketone, along with nitrous oxide, N2O.Related Products of 30931-67-0
Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica