Results 21 to 30 of about 287,814 (303)

Structural Transition in the Growth of Copper Terephthalate Metal–Organic Frameworks: Understanding the Effect of the Synthetic Protocol and Its Impact on Electrochemical Behavior

open access: yesCoatings, 2023
Some copper-based metal–organic frameworks show promise for use as electrocatalysts because they allow for an electrode configuration in which copper species with redox and electron-conducting properties are immobilized in a three-dimensional arrangement.
Sara L. Rodríguez   +4 more
semanticscholar   +1 more source

Synthetic reflection self-injection-locked microcombs [PDF]

open access: yesNature Photonics, 2023
Laser-driven microresonators have enabled chip-integrated light sources with unique properties, including the self-organized formation of ultrashort soliton pulses and frequency combs (microcombs).
Alexander Ulanov   +5 more
semanticscholar   +1 more source

New “Green” Approaches to the Synthesis of Pyrazole Derivatives

open access: yesMolecules, 2007
A novel approach to the synthesis of pyrazole derivatives from tosylhydrazones of α,β-unsaturated carbonyl compounds possessing a β-hydrogen is proposed, exploiting microwave (MW) activation coupled with solvent free reaction conditions.
Carla Villa   +7 more
doaj   +1 more source

The impact of mobility models on the performance of mobile Ad Hoc network routing protocol [PDF]

open access: yes, 2012
A mobility model represents nodes distribution and movement over the network. Several research works have shown that a selection of mobility model can affect the outcome of routing performance simulation in Mobile Ad Hoc Networks.
Harle, David   +2 more
core   +1 more source

Stochastic Driving Cycle Synthesis for Analyzing the Energy Consumption of a Battery Electric Bus

open access: yesIEEE Access, 2018
Previous driving cycle generation studies have focused on constructing a single cycle from a large data set. This paper takes the opposite approach by presenting a novel driving cycle synthetization method that can generate a large number of varying ...
Klaus Kivekas   +2 more
doaj   +1 more source

Food and human safety: the impact of microplastics

open access: yesCritical reviews in food science and nutrition, 2022
Plastic waste pollution is one of the biggest problems in the world today. The amount of plastic in the environment continues to increase, and human exposure to microplastic (MP) has become a reality. This subject has attracted the attention of the whole
Kornelia Kadac-Czapska   +2 more
semanticscholar   +1 more source

Synthesis and late-stage functionalization of complex molecules through C-H fluorination and nucleophilic aromatic substitution. [PDF]

open access: yes, 2014
We report the late-stage functionalization of multisubstituted pyridines and diazines at the position α to nitrogen. By this process, a series of functional groups and substituents bound to the ring through nitrogen, oxygen, sulfur, or carbon are ...
Fier, Patrick S, Hartwig, John F
core   +3 more sources

Synthesis of [13C3]-B6 Vitamers Labelled at Three Consecutive Positions Starting from [13C3]-Propionic Acid

open access: yesMolecules, 2018
[13C3]-labelled vitamers (PN, PL and PM) of the B6 group were prepared starting from [13C3]-propionic acid. [13C3]-PN was synthesized in ten linear steps with an overall yield of 17%.
Thomas Bachmann, Michael Rychlik
doaj   +1 more source

Impact of Synthesis Route on the Water Oxidation Kinetics of Hematite Photoanodes.

open access: yesJournal of Physical Chemistry Letters, 2020
Operando spectroelectrochemical analysis is used to determine the water oxidation reaction kinetics for hematite photoanodes prepared using four different synthetic procedures. Whilst these photoanodes exhibit very different current / voltage performance,
Camilo A. Mesa   +6 more
semanticscholar   +1 more source

Impact of the Manufacturing Processes of Aromatic-Polymer-Based Carbon Fiber on Life Cycle Greenhouse Gas Emissions

open access: yesSustainability, 2022
Carbon fibers (CFs) are promising lightweight materials to reduce vehicle fuel consumption. However, the most widely used polyacrylonitrile (PAN)-based CF production process consumes a considerable amount of energy.
Kaito Sakamoto   +3 more
semanticscholar   +1 more source

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