Tropical bartonellosis is a highly fatal epidemic and endemic infectious disease that occurs throughout the communities of the Andes Mountains in South America. The disease is caused by the facultative intracellular bacteria, Bartonella bacilliformis. The emergence of bartonellosis in new geographic areas and an increase in the number of reported cases suggest the need for a rapid test for epidemiologic study and investigation of the disease burden. The objective of ...
The thermal stability of nicalon nl400 at 1573, 1673, and 1773k has been studied by tga and xrd. under an ar atmosphere, nicalon pyrolysed severely to crystallize into beta-sic involving the generation of both sio and co. under an o2 atmosphere, the oxide film which formed around nicalon retarded the pyrolytic reaction of the core. nicalon coated with a silica film by the previous oxidation treatment pyrolysed hardly at all ...
We investigate the stability, bonding, and geometric structure of recently discovered metallocarbohedrenes by the use of density-functional calculations. It is found that the previously proposed T(h) dodecahedron structure is dynamically unstable. Instead, a new, stable, and more strongly bound structure with D(2d) symmetry is found. We find strong interactions between C-C and strong Ti-C covalent bonding. The stability of the D(2d) structure has been verified by calculating vibrational frequencies. The ...
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