Results 71 to 80 of about 19,915 (264)

Copper Benzene‐1,3,5‐Tricarboxylate Metal‐Organic Framework Performance as a Heterogeneous Catalyst for Biodiesel Production

open access: yesEnergy Science & Engineering
The increasing demand for sustainable fuels has driven extensive research into biodiesel production, which typically relies on the use of active catalysts to facilitate the transesterification of oils.
Jason Ik C. Lau   +5 more
doaj   +1 more source

Assessment of Sustainability Indicators for Cosmetic Product Packaging in the DACH Region

open access: yesCosmetics
The rapid expansion of the cosmetic products market, growing consumer eco-consciousness, and stricter packaging regulations, such as the PPWR, present significant challenges for the cosmetic industry. To assess the sustainability of cosmetic packaging, a
Michelle Klein   +4 more
doaj   +1 more source

Pd/C-Catalyzed Intramolecular C–H Arylation for the Synthesis of Phenanthridinones and Dibenzo-α-pyrones

open access: yesSynOpen, 2017
Pd/C was found to be an efficient and convenient metal catalyst for intramolecular C–H arylation reactions in the synthesis of phenanthridinones and dibenzo-α-pyrones. A variety of phenanthridinones and dibenzo-α-pyrones were synthesized under the highly
Lingyu Zhao   +4 more
doaj   +1 more source

A Simplified Laminar Flow Model for the Pultrusion of Glass Fiber/Polyethylene Terephthalate Commingled Yarns

open access: yesAdvanced Engineering Materials, EarlyView.
A simplified thermoplastic pultrusion model is developed to predict thermal fields in glass fiber/polyethylene terephthalate (GF/PET) composites with reduced computational cost. By combining effective material homogenization, validation against literature data, and Gaussian‐process‐based optimization, the study reveals how heating limits, pulling speed,
Elder Soares   +3 more
wiley   +1 more source

Reaction of indoles with aromatic fluoromethyl ketones: an efficient synthesis of trifluoromethyl(indolyl)phenylmethanols using K2CO3/n-Bu4PBr in water

open access: yesBeilstein Journal of Organic Chemistry, 2020
A new, mild and efficient protocol for the synthesis of trifluoromethyl(indolyl)phenylmethanols by the reaction of indoles with a variety of aromatic fluoromethyl ketones in the presence of K2CO3 (15 mol %) and n-Bu4PBr (15 mol %) in water.
Thanigaimalai Pillaiyar   +2 more
doaj   +1 more source

Additive Manufacturing of Continuous Fibre Reinforced Composites: Process, Characterisation, Modelling, and Sustainability

open access: yesAdvanced Engineering Materials, EarlyView.
Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley   +1 more source

Titanium dioxide Sol–Gel/Zinc oxide Sol–Gel and Titanium dioxide Sol–Gel/powdered Zinc Oxide-coated clay beads in photocatalytic reactor [PDF]

open access: yesAdvances in Environmental Technology
Nowadays, immobilized photocatalyst clay beads have attracted considerable research interest due to their outstanding properties, including enhanced stability, easy recovery and reuse, and reduced secondary pollution.
Thurgadewi Krishnan   +4 more
doaj   +1 more source

Understanding the Stochastic Nature of Process Parameter Development of Blown Powder Laser Beam Directed Energy Deposition Additive Manufacturing of Pure Molybdenum

open access: yesAdvanced Engineering Materials, EarlyView.
Identified through the use of statistical design of experiments and metallographic investigation, this study exposes the stochastic origins of intergranular cracks in blown powder laser beam directed energy deposition additive manufacturing of pure molybdenum. It further demonstrates a successful crack mitigation approach with direct correlation to the
Nathaniel J. Lies   +2 more
wiley   +1 more source

Choline taurinate: a new biocompatible amino-functionalized ionic liquid as basic catalyst and extraction solvent

open access: yesGreen Processing and Synthesis, 2018
A new biocompatible amino-functionalized ionic liquid composed solely of biomaterials was synthesized from taurine and choline hydroxide, and its physical properties (density, viscosity, miscibility and thermal stability) were also determined.
Deng Wenxiu, Liu Lujie, Peng Yanqing
doaj   +1 more source

Recycling of NiTi Shape Memory Alloys: Fundamental and Technological Aspects of a Vacuum Induction Melting Processing Route

open access: yesAdvanced Engineering Materials, EarlyView.
The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee   +7 more
wiley   +1 more source

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