Results 81 to 90 of about 17,159 (218)

Metathesis‐Sourced Epoxides in Ring‐Opening Copolymerization: Selective Access to Degradable Polythioesters

Macromolecular Rapid Communications, EarlyView.
Metathesis‐derived cyclopentene epoxides enable strictly alternating, scrambling‐free ring‐opening copolymerization with phthalic thioanhydride, yielding well‐defined polythioesters with molecular weights up to ∼38 kg/mol. Their performance extends to oxygen‐based anhydrides and selective terpolymerizations. Direct comparisons with all‐oxygen analogues
Niracha Tangyen, Bhargav R. Manjunatha, Valerio D'Elia, Alex J. Plajer   +3 more
wiley   +1 more source

Transesterification Reactions Catalyzed by Papain

Journal of Biological Chemistry, 1966
Abstract The hydrolysis of a series of esters of benzoyl-L-arginine and glycylglycine by papain has been examined in mixtures of water with various alcohols in the pH range of 5 to 6. The presence of straight chain alcohols resulted in an apparent inhibition of acid release.
openaire   +2 more sources

Development of a Sustainable Biocatalytic Process for Geranyl Benzoate Production Using Immobilized Lipase

ChemistryOpen, EarlyView.
This study optimized solvent‐free geranyl benzoate production using Lipozyme 435, achieving 72% conversion in 6 hours. Open reactors improved yields (>99% in 48 hours) by removing inhibitorymethanol. Methyl benzoate reduced enzyme activity by 54%, though Lipura Flex showed better resistance. Human cell tests confirmed no cytotoxicity.
Domenico Meola, Chaimae Chaibi, Simona Aprile, Karina Cesca, Debora de Oliveira, Ariela Veloso de Paula, Francesco Presini, Federico Zappaterra, Pier Paolo Giovannini, Lindomar Alberto Lerin   +9 more
wiley   +1 more source

Robust β‐myrcene block copolymer elastomeric vitrimers

Polymer International, EarlyView.
Myrcene‐based vitrimeric elastomers were compared: statistical (poly(styrene‐stat‐myrcene‐stat‐AAEMA)] versus ‘hard–soft’ diblock (poly(styrene)‐block‐poly(myrcene‐co‐AAEMA)). The diblock's ability to anchor the glassy poly(styrene) blocks in a self‐assembled microstructure was effective – leading to four times higher tensile stress and ten times ...
Chong Yang Du, Farhad Asempour, Milan Marić   +2 more
wiley   +1 more source

transesterification

Citation: 'transesterification' in the IUPAC Compendium of Chemical Terminology, 5th ed.; International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.15425 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Vegetable Oil–Mediated Transesterification as a Green Route to Tune Ethyl Cellulose Properties

Journal of Polymer Science, EarlyView.
An environmentally conscious strategy for augmenting the hydrophobicity of ethyl cellulose polymer via a transesterification reaction using renewable vegetable oil. ABSTRACT The inherent hydrophilicity of biopolymers presents significant limitations to their implementation, particularly in coating and packaging applications.
Athira Narayanan, Valeria D'Errico, Marco Friuli, Sonia Bagheri, Claudio Mele, Alessandro Sannino, Christian Demitri, Leonardo Lamanna   +7 more
wiley   +1 more source

Bio‐Based Polyurethanes: Mechanical Performance, Structure–Property Relationships, and Future Directions

Journal of Polymer Science, EarlyView.
This review examines bio‐based polyurethanes from renewable feedstocks, focusing on structure‐property relationships governing mechanical performance. It analyzes reinforcement strategies, benchmarks against petrochemical counterparts, and explores future directions, including non‐isocyanate routes and circular economy integration for sustainable high ...
Khaled Chawraba, Hussein Medlej, Mohamad Sakr, Akram Hijazi, Abrar Hussain   +4 more
wiley   +1 more source

Compatibilization Mechanisms of Telechelic Polyethylene Reactive Additives in Polyethylene Terephthalate/Polyethylene Blends

Journal of Polymer Science, EarlyView.
A deeper understanding of reactive blend compatibilization using hydroxy telechelic polyethylene additives in blends of glycol‐modified polyethylene terephthalate and polyethylene is developed. Preformation of copolymer during reactive mixing is key for successful compatibilization of this system at lower mixing temperatures. ABSTRACT Imperfect sorting
Aristotle J. Zervoudakis, Erin Maines, Caitlin S. Sample, Jamie Rowland, Christopher J. Ellison   +4 more
wiley   +1 more source

Transesterification Reactions Catalyzed by Subtilisins

Journal of Biological Chemistry, 1966
Abstract The hydrolysis of l-tyrosine ethyl ester by Carlsberg subtilisin, subtilisin BPN', and Novo bacterial proteinase has been examined in mixtures of water with various alcohols. The presence of straight chain alcohols resulted in an apparent inhibition of acid release.
openaire   +2 more sources

Assessing the Effects of Biodiesel Production on Sustainability: A Bayesian Two‐Stage Data Envelopment Analysis Approach

Sustainable Development, EarlyView.
ABSTRACT Sustainable development transforms production systems, requiring integrated environmental, social, and economic strategies. Energy systems are key agro‐industrial supply chains in developing countries. Brazil's soybean supply chain impacts Gross Domestic Product, mainly through exports.
Aline Veronese da Silva, Camila Veneo Campos Fonseca, Pedro Gerber Machado, Marcelo Azevedo Costa   +3 more
wiley   +1 more source