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Chemical upcycling of polybutadiene into size controlled α,ω-dienes and diesters sequential hydrogenation and cross-metathesis.
Chem Sci
January 2025
Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy for Sustainable Solutions (cMACS), KU Leuven Celestijnenlaan 200F, Post Box 2454 3001 Leuven Belgium
Plastic waste conversion into valuable chemicals is a promising alternative to landfill or incineration. In particular, the chemical upcycling of polybutadiene rubber (PBR) could provide a renewable route towards highly desirable α,ω-dienes with varying chain lengths, which can find ample industrial application. While previous research has shown that the treatment of polybutadiene with a consecutive hydrogenation and ethenolysis reaction can afford long-chain α,ω-dienes, achieving precise control over the product chain length remains an important bottleneck.
View Article and Find Full Text PDFComputational identification of novel natural inhibitors against triple mutant DNA gyrase A in fluoroquinolone-resistant Typhimurium.
Biochem Biophys Rep
March 2025
Department of Integrative Biology, School of Biosciences and Technology, Vellore Institute of Technology (VIT), Vellore, 632014, Tamil Nadu, India.
The rising resistance to fluoroquinolones in Typhimurium poses a significant global health challenge. This computational research addresses the pressing need for new therapeutic drugs by utilizing various computational tools to identify potential natural compounds that can inhibit the triple mutant DNA gyrase subunit A enzyme, which is crucial in fluoroquinolone resistance. Initially, the three-dimensional structure of the wild-type DNA gyrase A protein was modeled using homology modeling, and followed by mutagenesis to create the clinically relevant triple mutant (SER83PHE, ASP87GLY, ALA119SER) DNA gyrase A protein structure.
View Article and Find Full Text PDFAn Unexpected Water Channel in the Light-Harvesting Complex of a Diatom: Implications for the Switch between Light Harvesting and Photoprotection.
ACS Phys Chem Au
January 2025
School of Science, Constructor University, Campus Ring 1, 28759 Bremen, Germany.
Many important processes in cells depend on the transfer of protons through water wires embedded in transmembrane proteins. Herein, we have performed more than 55 μs all-atom simulations of the light-harvesting complex of a diatom, i.e.
View Article and Find Full Text PDFPreserving Integrity: Investigating the Influence of Disinfecting Agents on Polymethylmethacrylate Dental Prosthesis Surface Characteristics in Children.
Int J Clin Pediatr Dent
December 2024
Department of Dental Materials, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India.
Introduction: In children, polymethylmethacrylate (PMMA) is a commonly used material for fabrication of dental prostheses, such as obturators, removable space maintainers, habit-breaking appliances, removable orthodontic appliances, and removable partial and complete dentures. Regular cleaning of such prostheses is vital for maintaining the health of the oral tissues as well as the longevity of the prosthesis. The chemical method of disinfection, using different chemical cleansers, is commonly used for cleaning a dental prosthesis.
View Article and Find Full Text PDFRecycling of Post-Consumer Waste Polystyrene Using Commercial Plastic Additives.
ACS Cent Sci
January 2025
Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States.
Photothermal conversion can promote plastic depolymerization (chemical recycling to a monomer) through light-to-heat conversion. The highly localized temperature gradient near the photothermal agent surface allows selective heating with spatial control not observed with bulk pyrolysis. However, identifying and incorporating practical photothermal agents into plastics for end-of-life depolymerization have not been realized.
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