Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.
DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.
The use of dielec. measurements to assign mol. configurations was examd. with model compds. of the chloroalkane, chloroalkene and chlorocumulene type. A dielec. microcell is described which allowed measurements of 0.35 mL samples under exclusion of air. Bo ...
The structure and absolute configuration of natural lentiginosine isolated from plant sources was determined to be (1S,2S,8aS)-1,2-dihydroxyindolizidine ((+)-4) on the basis of the synthesis of both enantiomers (+)-4 and (-)-4 and their inhibition of amylo ...
Strained In0.35Ga0.65As/GaAs quantum wells of various thicknesses (6-16 monolayers) obtained by molecular beam epitaxy at 400 degrees C were studied by optical pumping techniques at 4 K. Improved quantum well optical properties, due to significant increase ...
Piezoelectric properties of Pb(Zr,Ti)O-3 thin films are investigated as a function of the number of bipolar (switching) and unipolar (nonswitching) voltage pulses. The longitudinal piezoelectric coefficient d(33) decreases with bipolar fatigue reflecting t ...
Pb(Zr0.70Ti0.30)O-3 rhombohedral thin films of (100), (110)/(111) and (111) textures were prepared on Si wafers with Ti/Pt electrodes. Microstructures and textures were characterized by XRD, SEM, TEM, and AFM. Ferroelectric, dielectric and fatigue properti ...
Epi-b-santalene (I; R = H), readily accessible in both enantiomeric forms, was regio- and stereoselectively converted into (R)-(-)- or (S)-(+)-(Z)-epi-b-santalol (I; R = OH) by consecutive metalation, borylation and oxidn. [on SciFinder (R)] ...
Derivatives of 7-oxabicyclo[2.2.l]hept-5-en-2-yl ("naked sugars") are readily available through Diels-Alder cycloaddition of furan to an appropriate dienophile. Several methods allow one to obtain these molecules in optically pure form. They have been used ...
The internuclear distance between two homonuclear dipolar-coupled dil. spins-1/2, SA and SX, can be measured by rotational resonance expts. in solid state NMR. These involve rotating the sample at the magic angle while fulfilling the condition for rotation ...
A novel method for polarization dispersion measurements using an interferometric loop is presented. It can be achieved using a particularly simple setup and provides a representation of the probability distribution of the polarization dispersion. ...
Polarization dispersion is an effect which may cause data rate penalty in optical links. This is caused by the combined effect of fibre birefringence and polarization couplings due to environmental perturbations. Polarization dispersion is therefore a stoc ...
