Results 91 to 100 of about 51,547 (253)

Fish Scales: A Multifunctional Biomaterial from Nature

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Fish scales demonstrate nature's solution to impact protection through overlapping multilayered architecture. This biological design combines mineralized surfaces with collagen networks to achieve both flexibility and fracture resistance. The structural principles inspire advanced protective materials and biomedical implants, where damage tolerance ...
Liyao Dong, Xiaojie Sun, Xiguang Chen
wiley   +1 more source

Effect of Free Fatty Acid Pretreatment to Yield, Composition and Activation Energy in Chemical Synthesis of Fatty Acid Methyl Ester

Indonesian Journal of Chemistry, 2019
Transesterification of waste cooking oil (WCO) for fatty acid methyl ester synthesis using calcium oxide (CaO) as a catalyst with absence and presence of free fatty acid (FFA) pretreatment (untreated and pretreated) prior to reaction have been ...
Nor Saadah Mohd Alias, Harumi Veny, Fazlena Hamzah, Noorhaliza Aziz   +3 more
doaj   +1 more source

Epoxidation of Cashmeran and Unprecedented Rearrangement to an α‐Carbonyl δ‐Spirolactone

European Journal of Organic Chemistry, EarlyView.
A new strategy enables diastereoselective conversion of Cashmeran into a previously unknown α‐carbonyl δ‐spirolactone via epoxidation, Baeyer–Villiger oxidation, and acid‐catalyzed rearrangement. Structure and mechanism were confirmed by NMR, single crystal X‐ray diffraction, and computational studies. We report the epoxidation of Cashmeran followed by
Lukas Kell, Niklas Bartsch, Johannes Panten, Marcus Eh, Jan Paradies, Hans Egold, Anke Spannenberg, Thomas Werner   +7 more
wiley   +1 more source

Characterization of Fatty Acid Profiles and Nutritional Quality Indices in Commercial Spreadable Processed Cheeses: Comparative Analysis and Health Implications

Food Safety and Health, EarlyView.
Natural processed cheeses showed a more favorable nutritional profile, including higher unsaturated fatty acids and better functional performance. A balanced fatty acid composition was identified as a key factor influencing meltability, oil separation, and overall quality of processed cheeses.
Shaimaa M. Hamdy, Amr A. Metwally, Mahmoud A. Deghedie, Hani S. Abdelmontaleb   +3 more
wiley   +1 more source

Contribution à l'étude de la réaction de transestérification par des catalyseurs pour la production du biocarburant [PDF]

149 p. : ill. ; 30 cmAu milieu des préoccupations croissantes concernant la crise climatique et le besoin urgent de réduire la dépendance aux combustibles fossiles pour atteindre des émissions de carbone nettes nulles, les biocarburants émergent comme ...
Kaddour, Omar(Directeur de thèse), Kouider Elouahed, Salima   +1 more
core  

Lithium and calcium modified MgAl mixed oxides as catalysts for ethylic transestérification [PDF]

, 2013
Esse trabalho tem como objetivo principal a obtenção de catalisadores heterogêneos com propriedades básicas para aplicação na reação de transesterificação usando etanol, visando à produção de biodiesel.
Cínthia Soares de Castro, Castro, Cínthia Soares de   +1 more
core  

Polymerized Pro‐Estrogen Microneedles via Two Photon Polymerization

Macromolecular Rapid Communications, EarlyView.
Acrylic pro‐drugs of 17β‐estradiol were subjected to spatially controlled two‐photon polymerization to create bespoke microneedle geometries with potential biomedical applications for long‐term transdermal hormone delivery. ABSTRACT Two‐photon polymerization (TPP) is a powerful technique to create microscale structures with high precision, offering ...
Yang Lou, John T. Leman, Harper Serringer, Ke Xia, Christopher N. LaFratta, Chaitanya Ullal, Edmund F. Palermo   +6 more
wiley   +1 more source

Environmental and economic sustainability assessment of biofuels from valorising spent coffee grounds

Cleaner Environmental Systems
This study quantifies and compares the life cycle environmental and economic sustainability of five most common and widely researched valorisation routes for spent coffee grounds (SCGs): i) fuel pelletizing; ii) combination of transesterification and ...
Piya Gosalvitr, Rosa M. Cuéllar-Franca, Robin Smith, Adisa Azapagic   +3 more
doaj   +1 more source

Recent Advances in Conductive Rubber Composites: Progress, Challenges, and Emerging Opportunities

Macromolecular Rapid Communications, EarlyView.
This study reviews the recent advances in conductive rubber composites, focusing on key aspects such as material selection, conductive mechanisms, interfacial engineering, processing methods, vulcanization strategies, and practical applications. It also discusses current challenges and highlights emerging directions that are shaping the development of ...
Lu Yin, Ali Vahidifar, Steven Yu, Boxin Zhao   +3 more
wiley   +1 more source

Biobased Epoxidized Castor Oil Covalent Adaptable Networks Adhesives Reinforced with Recycled Carbon Fibers

Macromolecular Rapid Communications, EarlyView.
It is reported the design of biobased sustainable, smart, and functional adhesives achieved dispersing recycled carbon fibers into biobased epoxy monomer. ABSTRACT The development of sustainable, smart, and functional adhesives is crucial in advancing environmentally friendly materials.
Alberto Cellai, Rafael Turra Alarcon, Bernhard Sölle, Elisabeth Rossegger, Valentina Casalegno, Milena Salvo, Marco Sangermano   +6 more
wiley   +1 more source