High resolution electron spectroscopic imaging (ESI) of reverse micelles

Abstract

Résumé. 2014 Nous avons examiné des micelles inverses de

Characteristics of biogenic calcite in the prismatic layer of a pearl oyster, Pinctada fucata

“…at the region (a). This peak corresponds to the electron transition from 1s to * (C C) bonds for carbon and is observed from organic matter, graphite, amorphous carbon, etc., but never from the carbonate ion (Gries et al, 2009;Mansot et al, 2003;Martin et al, 1989Martin et al, , 1990Varlot et al, 1999). On the other hand, the sharp peak around 289 eV and broad peak around 299 eV in the fine structure of the carbon K-edge are characteristic to carbonate materials (Mansot et al, 2003;Martin et al, 1989).…”

“…On the other hand, the sharp peak around 289 eV and broad peak around 299 eV in the fine structure of the carbon K-edge are characteristic to carbonate materials (Mansot et al, 2003;Martin et al, 1989). The peaks around 347 and 350 eV are calcium L 2,3 edges, corresponding to the electron transitions from 2p 1/2 to 3d and from 2p 3/2 to 3d, respectively (Mansot et al, 2003;Martin et al, 1990). From this result, it is concluded that the spherular contrasts correspond to organic substances surrounded by the crystal.…”

Calcium carbonate phase transformations during the carbonation reaction of calcium heavy alkylbenzene sulfonate overbased nanodetergents preparation

“…It is possible to discern the more detailed structure and composition of overbased nanodetergents by virtue of adopting modern analytical techniques such as dynamic light scattering (DLS) [17], scanning/ transmission electron microscopy (SEM/TEM) [18,19], FTIR [20], nuclear magnetic resonance (NMR) [12,17], and small angle Xray and neutron scattering (SAXS/SANS) [21]. Besides, theoretical calculation and modeling have been developed to simulate the process and predict the morphological parameters (size and shape) of the colloidal particles [13,[22][23][24][25][26][27].…”

Localization of calcium changes in stimulated rat mast cells.

“…As the thickness variations of the ultra-thin sections are very low and not detected, the 100 eV inelastic image (with 10 eV energy band) practically gives the calcium ESI on the M2.3 edge in the cell material, with a superb contrast. As the calcium M2.3 contribution should become negligible after 150 eV (Martin et al, 1990), the 250 eV loss inelastic image can also be interpreted in a first approximation as the sulfur mapping. ESI at the L2.3 edge reflects the presence of sulfur in this case.…”