CAS:1898-66-4
Storage:Powder:2-8℃,2 years;Insolvent(Mother Liquid):-20℃,6 months;-80℃,1 year
Purity:HPLC≥98%
Appearance:Black Solid
![](http://www.solarbio.net/data/png/jgs/1898-66-4.png)
Examples of using this product(for reference only)
DPPH scavenging activities:
The DPPH scavenging activities (%) of fresh MPN-GA samples (CON, A1, A2, F1 and F2) were evaluated via using the methods of Zhang et al. [17]. To be specific, fresh MPN-GAs (2.0 mL, 0, 0.01, 0.05, 0.25, 1 and 4 mg/mL), DPPH ethanol solution (0.8 mL, 0.4 mM) were incorporated into the water (4.0 mL). Then, obtained mixtures were centrifuged (6000 rpm, 15 min) after the reaction for 30 min (4 ℃, in the darkness). Final DPPH scavenging activities were assessed through the transformation of measured absorbance (517 nm).
Reference:
Chen J, Chen X, Zhou G, Xu X. New insights into the ultrasound impact on covalent reactions of myofibrillar protein. Ultrason Sonochem. 2022 Mar;84:105973. doi: 10.1016/j.ultsonch.2022.105973. Epub 2022 Mar 3. PMID: 35272240; PMCID: PMC8913343.
Antioxidant capacity:
Film samples (4–20 mg) were added to 10 mL of distilled water and stirred until completely dissolved. DPPH solution (0.2 mmol/L) was prepared in anhydrous ethanol (≥ 99.7 %). Film solution (2 mL) was mixed with 2 mL of DPPH solution and the absorbance at 517 nm measured after reacting for 30 min at 25 ℃ in the dark. The DPPH radical scavenging rate of a Vit C solution at the same concentration as the film solution was determined as a positive control. The DPPH radical scavenging activity of film samples was calculated as follows: DPPH radical scavenging activity (%) = (A0 ? A1 + A2)/ A0×100
where A0 is the absorbance of the mixture of distilled water and DPPH solution, A1 is the absorbance of the mixture of film or Vit C solution and DPPH solution, and A2 is the absorbance of the mixture of anhydrous alcohol and film or Vit C solution.
Reference:
Liu Z, Du M, Liu H, et al. Chitosan films incorporating litchi peel extract and titanium dioxide nanoparticles and their application as coatings on watercored apples[J]. Progress in Organic Coatings, 2021, 151:106103.
![](http://www.solarbio.net/themes/ec36_01/slo/imgs/zhuyi.png)