Tag: M.W=500-550

Hlushko, Raman published the artcileLayer-by-Layer Hydrogen-Bonded Antioxidant Films of Linear Synthetic Polyphenols, Recommanded Product: Ammonium 2,2′-(hydrazine-1,2-diylidene)bis(3-ethyl-2,3-dihydrobenzo[d]thiazole-6-sulfonate), the publication is Macromolecules (Washington, DC, United States) (2020), 53(3), 1033-1042, database is CAplus.

We report on the role of the chem. structure of polyphenol pendant groups in linear antioxidant polymers in their assembly and chain intermixing within layer-by-layer (LbL) films, as well as in the antioxidant performance of interfacial assemblies. When assembled with poly(ethylene oxide) (PEO) within hydrogen-bonded films, the antioxidant polymers-poly(3,4-dihydroxybenzyl methacrylamide) (P2HMA) and poly(3,4,5-trihydroxybenzyl methacrylamide) (P3HMA)-which contain catechol- and gallol-like moieties, resp., generated films with drastically different structure and functionality. Specifically, while catechol-based P2HMA deposited within LbL films linearly with a low increment of mass increase per step, the growth of P3HMA/PEO films was strongly exponential. Dramatic differences in chain intermixing and layering in these films are revealed by the application of neutron reflectometry using deuterated PEO, dPEO, to create marker layers. Differences in film structure strongly affected film antioxidant performance, as demonstrated by the radical scavenging assay. While assembled P3HMA was fully available for scavenging 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS^•+) radical cations, in assembled P2HMA, radical scavenging was restricted to the top ∼35 nm of the LbL film, highlighting the effect of LbL film structure on antioxidant performance.

Macromolecules (Washington, DC, United States) published new progress about 30931-67-0. 30931-67-0 belongs to thiazole, auxiliary class Salt,Hydrazine,Amine,Benzothiazole, name is Ammonium 2,2′-(hydrazine-1,2-diylidene)bis(3-ethyl-2,3-dihydrobenzo[d]thiazole-6-sulfonate), and the molecular formula is C18H24N6O6S4, Recommanded Product: Ammonium 2,2′-(hydrazine-1,2-diylidene)bis(3-ethyl-2,3-dihydrobenzo[d]thiazole-6-sulfonate).

Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/thiazole,
Thiazole | chemical compound | Britannica

Harguindeguy, Marine published the artcileGelatin supports with immobilized laccase as sustainable biocatalysts for water treatment, Category: thiazole, the publication is Journal of Applied Polymer Science (2021), 138(2), 49669, database is CAplus.

Millimeter-size beads of gelatin are manufactured by dripping process to give enzyme supports qualified for micropollutants biodegradation in alternative wastewater treatment. The bead diameter is dependent on the tip diameter, the gelatin solution viscosity and the swelling of polymer chains in the collecting bath. Chem. crosslinking was performed with glutaraldehyde using optimal concentration to give mech. and thermal properties suitable for application in stirred reactor in aqueous medium. Laccases from Trametes versicolor are grafted on the gelatin beads with glutaraldehyde. Sixty percentage of the initial enzymic activity, evaluated by the oxidation of 2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)diammonium salt (ABTS) is maintained after 10 successive cycles of reaction. Thermal stability at 60°C of immobilized biocatalysts is improved when compared to free enzymes (45% vs 10% of relative activity after 6 h of incubation). The simplicity of the procedure to form gelatin beads and their properties make them promising bio-based and biodegradable support for enzyme immobilization.

Journal of Applied Polymer Science published new progress about 30931-67-0. 30931-67-0 belongs to thiazole, auxiliary class Salt,Hydrazine,Amine,Benzothiazole, name is Ammonium 2,2′-(hydrazine-1,2-diylidene)bis(3-ethyl-2,3-dihydrobenzo[d]thiazole-6-sulfonate), and the molecular formula is C18H24N6O6S4, Category: thiazole.

Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/thiazole,
Thiazole | chemical compound | Britannica