Results 31 to 40 of about 264,880 (337)

Alkene selenenylation: A comprehensive analysis of relative reactivities, stereochemistry and asymmetric induction, and their comparisons with sulfenylation

open access: yesBeilstein Journal of Organic Chemistry, 2011
A broad perspective of various factors influencing alkene selenenylation has been developed by concurrent detailed analysis of key experimental and theoretical data, such as asymmetric induction, stereochemistry, relative reactivities, and comparison ...
Vadim A. Soloshonok, Donna J. Nelson
doaj   +1 more source

Stratification relieves constraints from steric hindrance in the generation of compact acto-myosin asters at the membrane cortex [PDF]

open access: yes, 2020
Recent in-vivo studies have revealed that several membrane proteins are driven to form nanoclusters by active contractile flows arising from F-actin and myosin at the cortex. The mechanism of clustering was shown to be arising from the dynamic patterning
Bhat, Abrar   +5 more
core   +3 more sources

A Computational Evaluation of the Steric and Electronic Contributions in Stereoselective Olefin Polymerization with Pyridylamido-Type Catalysts

open access: yesMolecules, 2023
A density functional theory (DFT) study combined with the steric maps of buried volume (%VBur) as molecular descriptors and an energy decomposition analysis through the ASM (activation strain model)–NEDA (natural energy decomposition analysis) approach ...
Olga D’Anania   +2 more
doaj   +1 more source

Multiple solutions of steady-state Poisson-Nernst-Planck equations with steric effects

open access: yes, 2014
Experiments measuring currents through single protein channels show unstable currents. Channels switch between 'open' or 'closed' states in a spontaneous stochastic process called gating.
Eisenberg, Bob, Lin, Tai-Chia
core   +1 more source

The electrophoretic membrane contactor: A mass-transfer-based methodology applied to the separation of whey proteins [PDF]

open access: yes, 2011
In the electrophoretic membrane contactor (EMC), a porous membrane is used to establish a contact across two flowing liquids between which an electrically driven mass transfer takes places.
Galier, Sylvain   +1 more
core   +1 more source

Breaking Trade‐Off between Selectivity and Activity of Nickel‐Based Hydrogenation Catalysts by Tuning Both Steric Effect and d‐Band Center

open access: yesAdvanced Science, 2019
For selective hydrogenation of chemicals the high selectivity is always at the expense of activity and improving both selectivity and activity is challenging.
Ruijie Gao   +6 more
doaj   +1 more source

Sea-level trend variability in the Mediterranean during the 1993–2019 period

open access: yesFrontiers in Marine Science, 2023
Sea-level change is one of the most concerning climate change and global warming consequences, especially impacting coastal societies and environments. The spatial and temporal variability of sea level is neither linear nor globally uniform, especially ...
Matteo Meli   +5 more
doaj   +1 more source

Poisson-Nernst-Planck equations with steric effects - non-convexity and multiple stationary solutions

open access: yes, 2017
We study the existence and stability of stationary solutions of Poisson-Nernst- Planck equations with steric effects (PNP-steric equations) with two counter-charged species.
Gavish, Nir
core   +1 more source

STERIC EFFECT IN DIFLUORINEALCANE MOLECULES [PDF]

open access: yesPhysical and chemical aspects of the study of clusters, nanostructures and nanomaterials, 2019
Fifteen conformers of the CHF2 – (CH2)6 – CH3 molecule were found. Within a «quantum theory of atoms in molecules», their equilibrium geometry, total energies and the electron structure were studied. Analysis and comparison of electron parameters revealed in some structures a steric effect from CHF2.
A.V. Kotomkin   +3 more
openaire   +2 more sources

Six-Dimensional Quantum Dynamics of Adsorption and Desorption of H_2 at Pd(100): No Need for a Molecular Precursor Adsorption State

open access: yes, 1996
We report six-dimensional quantum dynamical calculations of dissociative adsorption and associative desorption of the system H_2/Pd(100) using an ab-initio potential energy surface.
Alnot   +45 more
core   +1 more source

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