High resolution laboratory

Fullerenes, fulleranes and buckyonions are expected to present weaker transitions in the optical and near infrared with their number decreasing towards longer wavelengths. These transitions may be responsible for some of the known but unexplained diffuse interstellar bands. It would be very important to obtain high sensitivity, high resolution laboratory spectra of these molecules in the optical and near infrared for a more precise comparison with the very detailed observations of DIBs. 

FIGURE 5 Characterization of iron ammonia synthesis catalyst. High-resolution laboratory diffraction indicated a reversible modification of the iron (111) line profile. Under catalytic reaction conditions, a sub-nitride with x = 15-18 is present in addition to the bulk iron matrix. The fitting and assignment of the data were substantiated by observations of the line profile during step changes in the composition of the gas atmosphere. Details and references are given in the text. 

The Critical Role of High Resolution Laboratory Spectroscopy... 

High resolution laboratory absorption cross sections of O3 and NO2, in P.M. Borrell, P. BorreU, T. Cvitas, W. Seiler (eds), Proc. EUROTRAC Symp. 92, SPB Academic Publ, The Hague 1993, pp. 423-426. 

High-resolution laboratory absorption cross section of ozone. Temperature effect, Chem. Phys. Lett. 213 (1993) 610. 

We first present some recent results on small hydrocarbons methane, acetylene, and the methyl cation CH. Benchmark calculations have been performed on the determination of the equilibrium geometries of these species in their ground electronic state. These systems identified in numerous planetary atmospheres and interstellar medium present a renewed astrophysical interest [66, 102] and are extensively studied in high resolution laboratory experiments [14, 51]. 

The first step involved massive testing at ANDREX laboratory to determine the optimal detection process. Two imaging methods were discussed, one using a linear detector array, the other using a high resolution image intensifier. 

Some very high resolution or ultrasensitive spectroscopies emerging as of ca 1996 were beam spectroscopy, multiphoton absorption and ionisation, and frequency-modulation spectroscopy (8). Most of these were used primarily for laboratory research as of the mid-1990s, but eventual appHcation to analytical or sensor appHcations is expected. 

The structures of many different plant, insect, and animal spherical viruses have now been determined to high resolution, and in most of them the subunit structures have the same jelly roll topology. However, a very different fold of the subunit was found in bacteriophage MS2, whose structure was determined to 3 A resolution by Karin Valegard in the laboratory of Lars Liljas, Uppsala. 

Figure 6 High-resolution transmission electron microscopy image of an epitaxial thin film of Y Ba2Cu307 j, grown on LaAI03, shown in cross section. (Courtesy of T. E. MKchell, Los Alamos National Laboratory)...

Trace element analysis has become sufficiently important, especially to industrial users, that commercial laboratories specialising in trace and ultratrace elemental analysis are springing up. One such company specialises in high-resolution glow-discharge mass spectromety , which can often go, it is claimed, to better than parts per billion. This company s advertisements also offer a service, domiciled in India, to provide various forms of wet chemical analysis which, it is claimed, is now nearly impossible to find in the United States . 

The Environmental Health Laboratory Sciences Division of the National Center for Environmental Health, Centers for Disease Control and Prevention, is developing methods for the analysis of trichloroethylene and other volatile organic compounds in blood. These methods use purge and trap methodology, high resolution... 

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