Graft copolymers of chitosan with cellulose ether have been obtained by the solid-state reactive mixing of chitin, sodium hydroxide and hydroxyethyl cellulose under shear deformation in a pilot twin-screw extruder. The structure and composition of the products were determined by elemental analysis and IR spectroscopy. The physicochemical properties of aqueous solutions of copolymers were studied as a function of the composition, and were correlated to the mechanical characteristics of the resulting films to assess the performance of new copolymers as coating materials, non-woven fibrous materials or emulsifiers for interface stabilization during the microparticle fabrication process.
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http://dx.doi.org/10.3390/polym12030611 | DOI Listing |
Dalton Trans
January 2025
Institute of Chemistry, St Petersburg University, Universitetskii pr. 26, 198504 St. Petersburg, Russia.
A series of cyclometalated Au(III) complexes [Au(C^N^C)(C-L-P(O)Ph)] with C^N^C = 2,6-diphenylpyridine and alkynylphosphine oxide ligands (L = no linker, Au1; phenyl, Au2; biphenyl, Au3; naphthyl, Au4; anthracenyl, Au5) were synthesized and fully characterized by spectroscopic methods and single crystal XRD analysis. The complexes obtained exhibit triplet (Au1-Au3) and dual (Au4, Au5) emissions in solution, in the solid phase and in the PMMA film, whose characteristics depend on the linker's nature of the alkynylphosphine oxide ligand. The description of electronic transitions responsible for energy absorption and emission in Au(III) complexes was made on the basis of a detailed analysis of the results of DFT calculations and has shown to involve ILCT, LLCT and MLCT transitions of singlet and triplet nature.
View Article and Find Full Text PDFMol Pharm
January 2025
Department of Industrial and Molecular Pharmaceutics, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, Indiana 47907, United States.
Lumefantrine (LMF) is a low-solubility antimalarial drug that cures acute, uncomplicated malaria. It exerts its pharmacological effects against erythrocytic stages of spp. and prevents malaria pathogens from producing nucleic acid and protein, thereby eliminating the parasites.
View Article and Find Full Text PDFACS Sens
January 2025
State Key Laboratory of Materials Processing and Die Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), No. 1037, Luoyu Road, Wuhan 430074, P. R. China.
High selectivity and sensitivity sensing of HS gas play a decisive role in the early detection of sulfide solid-state battery failure. Herein, we construct the CsPbBr perovskite-based sensor that exhibits outstanding gas-sensing performance to HS at room temperature, including high selectivity, fast response/recovery speed (73.5/275.
View Article and Find Full Text PDFFood Chem X
January 2025
Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 10083, China.
Instability in initial abiotic factors of open solid-state fermentation systems can significantly alter 's flavor profile, but the mechanisms governing microbial interactions and flavor formation remain unclear. This study comprehensively monitored changes in abiotic factors, microbial communities, and flavor profiles across two distinct fermentation processes in a distillery, which differed significantly in their management of initial abiotic factors. Our results revealed significant differences in abiotic factors between the two groups, including moisture, ethanol, acidity, glucose, and organic acid levels.
View Article and Find Full Text PDFAdv Mater
January 2025
College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241002, P. R. China.
The conversion of nitrate-rich wastewater and biomass-derived blocks into high-value products using renewably generated electricity is a promising approach to modulate the artificial carbon and nitrogen cycle. Here, a new synthetic strategy of WO sub-nanoclusters is reported and supported on carbon materials as novel efficient electrocatalysts for nitrate reduction and its coupling with α-keto acids. In acidic solutions, the NH-NHOH selectivity can also optimized by adjusting the potential, with the total FE exceeding 80% over a wide potential range.
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