Results 91 to 100 of about 174,602 (303)

Cobalt/Photoredox Catalyzed Desymmetrization of Oxo and Azabicycles via Asymmetric Reductive Coupling With Alkynes

open access: yesAdvanced Science, EarlyView.
A one‐step, asymmetric reductive coupling of alkynes and oxa‐ and aza‐bicyclic olefins using a cobalt/photoredox catalytic system through desymmetrization. ABSTRACT Bicyclo[2.2.1]heptane frameworks represent a privileged structural motif prevalent in numerous natural products and bioactive molecules.
Subhankar Pradhan   +5 more
wiley   +1 more source

ML Workflows for Screening Degradation‐Relevant Properties of Forever Chemicals

open access: yesAdvanced Science, EarlyView.
The environmental persistence of per‐ and polyfluoroalkyl substances (PFAS) necessitates efficient remediation strategies. This study presents physics‐informed machine learning workflows that accurately predict critical degradation properties, including bond dissociation energies and polarizability.
Pranoy Ray   +3 more
wiley   +1 more source

(Table A) Concentrations of aliphatic hydrocarbons and hexachlorocyclohexane isomers in under-ice water of the Greenland Sea

open access: yes, 1987
(Table A) Concentrations of aliphatic hydrocarbons and hexachlorocyclohexane isomers in under-ice water of the Greenland ...
Dmitriev, F A   +3 more
core   +1 more source

Efficient Screening of Organic Singlet Fission Molecules Using Graph Neural Networks

open access: yesAdvanced Science, EarlyView.
A high‐throughput screening framework based on graph neural networks (GNNs) and multi‐level validation facilitates the identification of singlet fission (SF) candidates. By efficiently predicting excitation energies across 20 million molecules, and integrating TDDFT calculations, synthetic accessibility assessments, and GW+BSE calculations, this ...
Li Fu   +5 more
wiley   +1 more source

Spectroscopic identification of geometrical isomers of α- and β-carotenes from palm oil

open access: yes, 2005
To date, all identification of palm carotenoids are tentative based on electronic absorption spectra, comparison of the elution sequence with past studies and authentic standards.
Ee, Gwendoline Cheng Lian   +1 more
core   +1 more source

ZrO2 Aerogel‐Supported Pd Nanoparticles for Photothermal CO2 Reduction

open access: yesAdvanced Science, EarlyView.
Nanoparticle‐based aerogels are promising catalysts for photothermal reactions due to optical transparency, high surface area, and low thermal conductivity. Here, we present deposition of Pd nanoparticles on ZrO2 aerogel granules by a wet‐impregnation approach.
David Kiwic   +3 more
wiley   +1 more source

Conjugated linoleic acid: chemical structure, occurrence and effects on human health

open access: yesRevista do Instituto de Latícinios Cândido Tostes, 2014
Conjugated linoleic acid (CLA) is the group of positional and geometric isomers of linoleic acid, which are naturally synthesized in the rumen of animals. The main dietary sources of CLA are milk, dairy products end meat from ruminant animals.
Juliana Nunes Lucatto   +2 more
doaj   +1 more source

Optimizing Stratification in Binary Colloidal Supraparticles

open access: yesAdvanced Science, EarlyView.
Supraparticles from binary particle populations show stratification when dried at high Péclet numbers. In spray‐dried systems at high initial particle concentration and fast drying conditions optimal combinations of particle size ratios and volume fractions that produce maximal stratification are found both in experiment and simulation, contrasting the
Frederic Rudlof   +5 more
wiley   +1 more source

Explosion Characteristics of Propanol Isomer–Air Mixtures

open access: yesEnergies, 2019
This paper describes a series of experiments performed to study the explosion characteristics of propanol isomer (1-propanol and 2-propanol)−air binary mixtures. The experiments were conducted in two different experimental arrangements—a 0.02
Jan Skřínský, Tadeáš Ochodek
doaj   +1 more source

Unveiling Activation Process of C═N Cathode for High‐Performing Zinc‐Organic Batteries

open access: yesAdvanced Science, EarlyView.
A high‐performance organic cathode of DPPT has been designed for aqueous zinc‐ion batteries (ZIBs), showing ultralong cycle life of 45 000 cycles. Besides, flexible DPPT ZIBs with stable capacity are applied in wearable NH3 sensors. Notably, the activation mechanism of the transformation of DPPT‐eight proton into DPPT is proposed and proved which ...
Xiaodong Geng   +11 more
wiley   +1 more source

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