Search results for "CF"
showing 10 items of 701 documents
Macro-micro relationship in nanostructured functional composites
2012
This paper examines the results of the characterization of two functional composites: Poly(methyl methacrylate) (PMMA)-Ce:YAG (yttrium aluminium garnet doped with cerium) and PMMA-cobalt hexacyanoferrate (CoHCF). The composites were prepared as possible emitters in the fields of lighting thermal sensors. The prepared composites were char- acterized using transmission electron microscopy (TEM), nuclear magnetic resonance (NMR) spectroscopy, thermogravi- metric analysis (TGA), differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) analyses to study the correlation between micro and macro characteristics. We found that the molecular interactions of the two different fill…
L'exclusion des ministres communistes du gouvernement en mai 1947
2022
Le 4 mai 1947, les ministres communistes sont exclus du gouvernement, auquel ils participaient depuis la Libération. Dans un contexte de conflictualité sociale et d'exacerbation des tensions géopolitiques, à l'aube de la guerre froide, l'alliance tripartite entre le PCF, la SFIO et le MRP semblait vouée à la rupture. Celle-ci n'était toutefois pas pensée comme définitive par les communistes en mai 1947, de telle sorte que l'on peut distinguer deux dynamiques qui participent successivement au processus d'isolement des communistes : une « exclusion positive » de ces derniers par le reste du gouvernement dans un premier temps, avec la conviction de pouvoir y revenir rapidement, puis un phénomè…
Current development of CFTR potentiators in the last decade
2020
Cystic fibrosis (CF) is a genetic disorder produced by the loss of function of CFTR, a main chloride channel involved in transepithelial salt and water transport. CFTR function can be rescued by small molecules called "potentiators" which increase gating activity of CFTR on epithelial surfaces. High throughput screening (HTS) assays allowed the identification of new chemical entities endowed with potentiator properties, further improved through medicinal chemistry optimization. In this review, the most relevant classes of CFTR potentiators developed in the last decade were explored, focusing on structure-activity relationships (SAR) of the different chemical entities, as a useful tool for t…
The effective cross section for double parton scattering within a holographic AdS/QCD approach
2017
A first attempt to apply the AdS/QCD framework for a bottom-up approach to the evaluation of the effective cross section for double parton scattering in proton-proton collisions is presented. The main goal is the analytic evaluation of the dependence of the effective cross section on the longitudinal momenta of the involved partons, obtained within the holographic Soft-Wall model. If measured in high-energy processes at hadron colliders, this momentum dependence could open a new window on 2-parton correlations in a proton.
Identifying critical factors for implementing good agricultural practice
2009
En este artículo se presenta la identificación de los factores críticos (FC) que afectan la implantación de un programa de buenas prácticas agrícolas (BPA) en productores de café y frutas del departamento del Huila, en Colombia, mediante la realización de un análisis factorial exploratorio utilizando como método de factorización el análisis de componentes principales (ACP); las matrices de datos se construyeron con los resultados de la aplicación de sendos instrumentos con estructura definida en las dos poblaciones objeto de estudio, el instrumento Starbucks C.A.F.E. Practices -para pequeños caficultores en el caso de los productores de café- y EUREPGAP V2.1 Oct.2004 - Checklist-listado de …
A SIMULTANEOUS ENGINEERING APPROACH TO THE YACHT DESIGN
2009
The authors describe the approach applied to the design and manufacturing of a 15” dinghy which will challenge other similar sailing boats in fleet regattas. The Simultaneous Engineering approach appears to be the most powerful instrument since it permits to keep under control many variables simultaneously and then to reduce the Time To Market. Starting from regatta rules and limitations, the hull shape has been chosen and then modelled with a parametric CAD software. Such a model has been managed in order to be suitable for both FEM (Finite Element Method) and CFD (Computational Fluid Dynamics) analyses.
Le PCF 1984-1988 : le temps du déclin
2019
International audience
A theoretical study of the intramolecular charge transfer in 4-(dimethylamino)benzethyne
2014
We have investigated the non-adiabatic relaxation processes occurring in the singlet manifold of 4-(dimethylamino)benzethyne (DMABE){,} a molecule isoelectronic with 4-(dimethylamino)benzonitrile (DMABN) but lacking its characteristic dual fluorescence{,} using multireference perturbation theory methods. The results obtained point out to the existence of a two-fold decay mechanism in which the population of the initially accessed La state bifurcates towards a locally excited (LE) and a [small pi][sigma]* state. Further relaxation to an emitting intramolecular charge transfer (ICT) state is impeded due to the presence of pronounced energy barriers along their associated potential energy surf…
On the role of the triplet state in the cis/trans isomerization of rhodopsin: A CASPT2//CASSCF study of a model chromophore
2011
The possibility of population of the lowest-lying triplet state (T1) in the early events of the photochemical isomerization process of a model chromophore of Rhodopsin (Rh) has been analyzed using multireference perturbation theory (CASPT2//CASSCF) methods. It is shown that the characteristics of the isomerization process namely small S1−T1 gap, presence of hydrogen out of plane active vibrational modes, and existence of a dense manifold of vibrational states, render possible the fulfilment of the conditions needed for the population of T1. The possible consequences for the photochemistry and photophysics of Rh are also discussed. © 2011 Wiley Periodicals, Inc. Int J Quantum Chem 111:3431–3…
Optimal control in models with conductive‐radiative heat transfer
2003
In this paper an optimal control problem for the elliptic boundary value problem with nonlocal boundary conditions is considered. It is shown that the weak solutions of the boundary value problem depend smoothly on the control parameter and that the cost functional of the optimal control problem is Frechet differentiable with respect to the control parameter. Optimalus valdymas modeliuose su laidžiu-radioaktyviu šilumos pernešimu Santrauka Darbe nagrinejamas nelokalaus kraštinio uždavinio optimalaus valdymo uždavinys. Parodyta, kad silpnasis kraštinio uždavinio sprendinys tolydžiai priklauso nuo valdomojo parametro, taigi, optimalaus valdymo tikslo funkcija yra diferencijuojama Freše prasme…