《Adsorption of caffeic acid on chitosan powder》 was written by Liudvinaviciute, Dovile; Rutkaite, Ramune; Bendoraitiene, Joana; Klimaviciute, Rima; Zambzickaite, Greta. HPLC of Formula: 30931-67-0 And the article was included in Polymer Bulletin (Heidelberg, Germany) on April 30 ,2021. The article conveys some information:
Abstract: Adsorption of caffeic acid (CA) on chitosan (CH) powder from aqueous solution has been investigated to obtain insoluble CA-CH complex powders having different amount of CA. The pseudo-second kinetic model and the Langmuir, Freundlich and Dubinin-Radushkevich adsorption models were used to describe the kinetic and equilibrium adsorption of CA on CH. With the increase of adsorption temperature, the rate of adsorption increased while the amount of adsorbed CA decreased. The Langmuir adsorption model predicted that adsorption of CA takes place on the ionized amino groups of CH. However, with the increase of adsorption temperature the ion-exchange between carboxylic groups of CA and amino groups of CH became moderately difficult. The thermodn. characteristics of adsorption have been evaluated. CA-CH complex formation was confirmed by FT-IR spectroscopy. With increasing amount of adsorbed CA the CA-CH powder was becoming more hydrophobic. 2,2′-Azinobis-(3-ethylbenzothiazoline-6-sulfonate) (ABTS) assay confirmed that CA retained the antioxidant activity when immobilized on chitosan power. In the experiment, the researchers used ABTS Diammonium(cas: 30931-67-0HPLC of Formula: 30931-67-0)
ABTS Diammonium(cas: 30931-67-0) belongs to anime. Left-handed and right-handed forms (mirror-image configurations, known as optical isomers or enantiomers) are possible when all the substituents on the central nitrogen atom are different (i.e., the nitrogen is chiral). With amines, there is extremely rapid inversion in which the two configurations are interconverted.HPLC of Formula: 30931-67-0
Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica