Synchroton

Synchrotron radiation is not a serious problem for proton synchrotrons, but it is for high energy electron synchrotons because the mass of the electron is... 

Viovy,J.L. and Monnerie, L. Fluorescence Anisotropy Technique Using Synchroton Radiation as a Powerful Means for Studying the Orientation Correlation Functions of Polymer Chains. Vol. 67, pp. 99—122. 

Bisquinolizidine alkaloids have also been widely studied by this technique. For instance, the crystal structure of (—)-A16(17 ,-dehydrolupaninium perchlorate 23 was obtained from sealed-tube and synchroton X-ray diffraction data, and showed that the A, B, C, and D rings assume distorted half-chair, chair, distorted sofa, and chair conformations, respectively it was also used to determine the most precise dimensions so far known for the iminium group <1999JST245>. The crystal structure of quinolizinium hexafluorophosphate has also been studied <2001CSC174>. 

Direct in situ X ray (from synchroton radiation) adsorption measurements (EXAFS) (Hayes et al., 1987, Brown et al., 1989) permit the determination of adsorbed species to neighboring ions and to central ions on oxide surfaces in the presence of water. Such investigations showed, for example, that selenite is inner-spherically and selenate is outer-spherically bound to the central Fe(lll) ions of a goethite surface. It was also shown by this technique that Pb(II) is inner-spherically bound to 5-AI2O3 (Chisholm-Brause et al., 1989). 

Vacancy ordering in y-Fe203 Synchroton X-ray powder diffraction and high resolution electron microscopy studies. J.Phys. Chem.-Solids 10 35-43... 

Swanton, S. W., Baston, G., Cowper, M. M. Charnock, J. M. 1998. EXAFS study of uranium(VI) sorbed to hematite. Proceedings Workshop on Speciation, Techniques and. Facilities for Radioactive Materials at Synchroton Light Sources, Grenoble, France, Nuclear Energy Agency. 

Synchroton-based micro-x-ray diffraction ( l-SRXRD) is being increasingly applied in the mineralogical characterization of art and archaeological objects [62]. 

The far infrared region. The standard infrared (IR) light source used to be the glowbar, but in recent years it was realized that synchroton radiation... 

Demonstration of surface shifts in the nonmetal levels, i.e. in the C Is and N Is levels, was not feasible in these first efforts. These levels are located considerably deeper in energy and were inaccessible. Recent developments in synchroton radiation instrumentation,15 however, allow high resolution core level studies to be performed involving these levels.16-20 The first such study was carried out on the (100) and (111) surfaces of VC16 and a surface shifted C Is level was clearly observed (Figure 25.2). A C Is... 

Mikuushkin V.M., Shnitov V.V., Gordeev Yu.S., Molodtsov S.L., Vyalykh D.V. Photoemission resonance and its decay in the process of destruction of C6o fullerite molecular structure by synchroton irradiation. Fiz.Tv.Tela (in Russian) 2004 46 2233-2237. 

Five crystal modifications of Aspartame are known (Ajinomoto 1983 Hatada et al. 1985 Nagashima etal. 1987 Kishimoto andNaruse 1988 Tsuboi etal. 1991 Furedi-Milhofer et al. 1999). A number of analytical methods have been used recently to characterize three of them two hemihydrate polymorphs and a dihemihydrate (Leung etal. 1998a,b, Zell etal. 1999). The crystal structure of one of the hemihydrate forms, known as Form I, was published earlier (Hatada etal. 1985). More recently, synchroton radiation was used to determine the structure of the low humidity form (denoted Form Ib by the authors), with an asymmetric unit comprised of three aspartame molecules and two water molecules (Meguro et al. 2000). 

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