Recherche

detector compared to use of the full white beam. Data collection is feasible for samples with unit-cell edges ranging from ~50 to 150 Å using crystal volumes from ~0.05 to 0.5mm3, respectively. For more

also possible to perform low resolution cristallography experiments on crystals of very large unit cells (viruses, lipoproteins, ...). Preliminary tests done at the end of last cycle showed a gain of a factor

mode : vTAS allows experimentation with sample parameters, for example the Miller indices of the unit cell, whilst maintaining a representation of the instruments physical state, for example the location of

naturally rich in hydrogen and other light elements, are ideal samples for analysis with neutrons: cell membranes, proteins, viruses, photosynthesis studies Since neutron diffraction is non-destructive

mode : vTAS allows experimentation with sample parameters, for example the Miller indices of the unit cell, whilst maintaining a representation of the instruments physical state, for example the location of

rotation without offset psi = Offset - Omega; irun = irun(ind); nfiles = numel(irun); spe_file = cell(1,nfiles); % Cell matrix of spe files to use for k=1:nfiles spe_file{k}=[indir, 'sqw_' ,num2str(irun(k,1)) ... /verbose ) ; --------------------------------------------------------------------- ; 1.2.1) Empty Cell sample (or buffer) ; Substraction ...

sample changer, 10 to 22 positions electromagnets up to 2 Tesla cryostats (4 to 300 K) Couette shear cell (sample volume 4.5/7.5 ml, max. G = 12000 s -1 ) 3. Data acquisition and NOMAD The data acquisition ... whole detector behaves like a single detector with a dead time of 2.06 microsec. Corrected counts per cell are obtained by I(x,y,true) = ...

scattering investigation of the hydrogen surface self-diffusion on polymer electrolyte membrane fuel cell catalyst support J. Phys. Chem. C 112, 3121 (2008). 28 J. Gutierrez, J. M. Barandiaran, F. J. Bermejo

: LA1, UA1, ZA1, LA2, UA2, ZA2, LA3 ... h2. Sample * AS * BS Sample unit-cell edges [Angstrom] * CS * AA * BB Sample unit-cell angles [degrees] * CC * ETAS Sample mosaic [minutes FwHm] * AX * AY Components

requires three steps in data treatment : the calibration of the q axis, the subtraction of the empty cell and calibration of the intensity and the desmearing to make the scattering pattern what it is supposed ... to correlate changes in polymer conformation with membrane activity assessed using a rat red blood cell haemolysis assay. With decreasing ...