4 research outputs found
Bifurcation analysis of the behavior of partially wetting liquids on a rotating cylinder
We discuss the behavior of partially wetting liquids on a rotating cylinder using a model
that takes into account the effects of gravity, viscosity, rotation, surface tension and wettability. Such a system can be considered as a prototype for many other systems where the interplay of spatial heterogeneity and a lateral driving force in the proximity of a first- or second-order phase transition results in intricate behavior. So does a partially wetting drop
on a rotating cylinder undergo a depinning transition as the rotation speed is increased, whereas for ideally wetting liquids the behavior only changes quantitatively. We analyze the bifurcations that occur when the rotation speed is increased for several values of the
equilibrium contact angle of the partially wetting liquids. This allows us to discuss how the entire bifurcation structure and the flow behavior it encodes changes with changing wettability. We employ various numerical continuation techniques that allow us to track stable/unstable steady and time-periodic film and drop thickness profiles. We support our findings by time-dependent numerical simulations and asymptotic analyses of steady and time-periodic profiles for large rotation numbers
Automatisation du suivi de production dans un atelier de galvanisation
SIGLECNRS TD Bordereau / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc
Supplement 1: Heralding single photons from a high-Q silicon microdisk
Supplemental document Originally published in Optica on 20 December 2016 (optica-3-12-1331
DARC: Mapping Surface Topography by Ray-Casting for Effective Virtual Screening at Protein Interaction Sites
Proteināprotein interactions
represent an exciting and challenging
target class for therapeutic intervention using small molecules. Protein
interaction sites are often devoid of the deep surface pockets presented
by ātraditionalā drug targets, and crystal structures
reveal that inhibitors typically engage these sites using very shallow
binding modes. As a consequence, modern virtual screening tools developed
to identify inhibitors of traditional drug targets do not perform
as well when they are instead deployed at protein interaction sites.
To address the need for novel inhibitors of important protein interactions,
here we introduce an alternate docking strategy specifically designed
for this regime. Our method, termed DARC (<u>D</u>ocking <u>A</u>pproach using <u>R</u>ay-<u>C</u>asting), matches the topography of a surface
pocket āobservedā from within the protein to the topography
āobservedā when viewing a potential ligand from the
same vantage point. We applied DARC to carry out a virtual screen
against the protein interaction site of human antiapoptotic protein
Mcl-1 and found that four of the top-scoring 21 compounds showed clear
inhibition in a biochemical assay. The <i>K</i><sub>i</sub> values for these compounds ranged from 1.2 to 21 Ī¼M, and each
had ligand efficiency comparable to promising small-molecule inhibitors
of other proteināprotein interactions. These hit compounds
do not resemble the natural (protein) binding partner of Mcl-1, nor
do they resemble any known inhibitors of Mcl-1. Our results thus demonstrate
the utility of DARC for identifying novel inhibitors of proteināprotein
interactions