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Polyamide Microparticles with Immobilized Enological Pectinase as Efficient Biocatalysts for Wine Clarification: The Role of the Polymer Support.
Molecules
December 2024
IPC-Institute for Polymers and Composites, University of Minho, 4800-056 Guimarães, Portugal.
Free pectinase is commonly employed as a biocatalyst in wine clarification; however, its removal, recovery, and reuse are not feasible. To address these limitations, this study focuses on the immobilization of a commercial pectinolytic preparation (Pec) onto highly porous polymer microparticles (MPs). Seven microparticulate polyamide (PA) supports, namely PA4, PA6, PA12 (with and without magnetic properties), and the copolymeric PA612 MP, were synthesized through activated anionic ring-opening polymerization of various lactams.
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December 2024
School of Health Science and Engineering, Shanghai Engineering Research Center of Food Rapid Detection, University of Shanghai for Science and Technology, Shanghai 200093, China. Electronic address:
Aptamer conformations are susceptible to environmental conditions, which makes it difficult to achieve stable targets detection in complex environments with aptasensors. Imprinting strategy was proposed to immobilize the specific conformation of aptamers, aiming to enhance their recognition anti-interference. However, it is mechanistically unclear how the imprinted polymers affect aptamers' recognition, which limits application of the strategy.
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Small Methods
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Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC, H3A 0B8, Canada.
Covalently branched DNA molecules are hybrid structures where a small molecule core is covalently linked to different DNA strands. They merge the programmability of DNA nanotechnology with synthetic molecules' functionality, offering enhanced stability over their non-covalent counterparts like double-crossover tiles. They enable the efficient assembly of stable DNA nanostructures with new geometries and functionalities.
View Article and Find Full Text PDFNi(II)-Dithiocarbamate and -diphosphine coordination complexes as pre-catalysts for electrochemical OER activity.
Dalton Trans
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Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India.
Electrochemical water oxidation holds immense potential for sustainable energy generation, splitting water into clean-burning hydrogen and life-giving oxygen. However, a key roadblock lies in the sluggish nature of the oxygen evolution reaction (OER). Finding stable, cost-effective, and environmentally friendly catalysts with high OER efficiency is crucial to unlock this technology's full potential.
View Article and Find Full Text PDFEfficiency Enhancement in Peptide Hydrogelators: The Crucial Role of Side Chain Hydrogen Bonding Over Aromatic π-π Interactions.
Langmuir
November 2024
Organic and Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai 600020, India.
Article Synopsis
- Short peptide assemblies that form supramolecular hydrogels are stabilized by noncovalent interactions among amino acid side chains, with a focus on the role of hydrogen bonds from side chains over aromatic π-π interactions.
- Research on Fluorenylmethoxycarbonyl (Fmoc)-functionalized peptides showed that certain substitutions significantly impacted minimum gelation concentrations (MGC), identifying Syn-N and Syn-Q as super hydrogelators.
- The study concluded that asparagine enhances hydrogelation through effective hydrogen bonding with water, while glutamine's efficiency is reduced due to its longer side chain potentially disrupting hydrogen bond networks.
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