Results 51 to 60 of about 848,132 (406)
Active Matter on Asymmetric Substrates [PDF]
Proc. SPIE 8097, 80970A (2011), 2011 For collections of particles in a thermal bath interacting with an asymmetric substrate, it is possible for a ratchet effect to occur where the particles undergo a net dc motion in response to an ac forcing. Ratchet effects have been demonstrated in a variety of systems including colloids as well as magnetic vortices in type-II superconductors. Here we
arxiv +1 more source
Metal-organic frameworks as selective or chiral oxidation catalysts [PDF]
, 2014 Since the discovery of Metal Organic Frameworks (MOFs) in the early 1990s, the amount of new structures has grown exponentially. A MOF typically consists of inorganic nodes that are connected by organic linkers to form crystalline, highly porous ...
Leus, Karen +2 more
core +1 more source
MoleculesA facile strategy to increase the chemoselectivity of domino reactions was proposed and successfully applied in the α-functionalization of ketones.
Hui Sun +3 more
doaj +1 more source
Acta Pharmaceutica Sinica B, 2023 Our recent studies for nonnucleoside reverse transcriptase inhibitors identified a highly potent compound JK-4b against WT HIV-1 (EC50 = 1.0 nmol/L), but the poor metabolic stability in human liver microsomes (t1/2 = 14.6 min) and insufficient ...
Xin Jin +9 more
doaj
CHIMIA, 1999 Our main research interests are in the areas of homogeneous and heterogeneous asymmetric catalysis, focusing on the development of new classes of chiral ligands for the enantiocontrol of metal-catalyzed reactions.
Andreas Pfaltz
doaj +1 more source
Open Charm mesons in magnetized nuclear matter -- effects of (inverse) magnetic catalysis [PDF]
arXiv, 2022 The in-medium masses of the open charm ($D$ and $\bar D$) mesons in magnetized isospin asymmetric nuclear matter are investigated within a chiral effective model, including the contributions of the Dirac sea (DS) to the self-energies of the nucleons. Within the model, the masses of these mesons are calculated from their interactions with the nucleons ...
arxiv
Bond breaking in vibrationally excited methane on transition metal catalysts [PDF]
Phys. Rev. B 61, 15657-60 (2000), 2000 The role of vibrational excitation of a single mode in the scattering of methane is studied by wave packet simulations of oriented CH4 and CD4 molecules from a flat surface. All nine internal vibrations are included. In the translational energy range from 32 up to 128 kJ/mol we find that initial vibrational excitations enhance the transfer of ...
arxiv +1 more source
Picomolar inhibitor of reverse transcriptase featuring significantly improved metabolic stability
Acta Pharmaceutica Sinica B, 2023 Considering the undesirable metabolic stability of our recently identified NNRTI 5 (t1/2 = 96 min) in human liver microsomes, we directed our efforts to improve its metabolic stability by introducing a new favorable hydroxymethyl side chain to the C-5 ...
Ya-Li Sang +4 more
doaj
Kinesin Is an Evolutionarily Fine-Tuned Molecular Ratchet-and-Pawl Device of Decisively Locked Direction [PDF]
Biophysical Journal 93 (2007) 3363-3372, 2009 Conventional kinesin is a dimeric motor protein that transports membranous organelles toward the plus-end of microtubules (MTs). Individual kinesin dimers show steadfast directionality and hundreds of consecutive steps, yetthe detailed physical mechanism remains unclear.
arxiv +1 more source
Strong and Confined Acids Enable a Catalytic Asymmetric Nazarov Cyclization of Simple Divinyl Ketones [PDF]
, 2019 We report a catalytic asymmetric Nazarov cyclization of simple, acylic, alkyl-substituted divinyl ketones using our recently disclosed strong and confined imidodiphosphorimidate Brønsted acids.
De, C. +4 more
core +2 more sources