ARPS

Electronic spectra of surfaces can give information about what species are present and their valence states. X-ray photoelectron spectroscopy (XPS) and its variant, ESC A, are commonly used. Figure VIII-11 shows the application to an A1 surface and Fig. XVIII-6, to the more complicated case of Mo supported on TiOi [37] Fig. XVIII-7 shows the detection of photochemically produced Br atoms on Pt(lll) [38]. Other spectroscopies that bear on the chemical state of adsorbed species include (see Table VIII-1) photoelectron spectroscopy (PES) [39-41], angle resolved PES or ARPES [42], and Auger electron spectroscopy (AES) [43-47]. Spectroscopic detection of adsorbed hydrogen is difficult, and... 

Weissermel, K- Arpe, H.-J. 1978, Industrielle organische Chemie, 2nd edn., Verlag Chemie Weinheim, Ger. 

K. Weissermel and H. J. Arpe, Industrial Organic Chemisty, A. MuUen, trans., Vedag Chemie, New York, 1978, pp. 266—267. 

Some of the solvent assignments seem capricious, such as CCU in ARP, CF3COOH in AD, and CHCI3 and CftHjNHi in MISC. From one point of view, it is a triumph that a purely statistical treatment, devoid of chemical experience or intuition, can generate a scheme more or less in accord with chemical concepts. However, it does not seem to be superior to the simple application of chemical ideas. 

Arps, J. J., Continuous logging while drilling A practical reality, SPE 710, SPE Annual Fall Meeting, New Orleans, October 6-9, 1963. 

Arps, J. J., and J. L. Arps, The subsurface telemetry problem A practical solution, yourna/ of Petroleum Engineering, May 1964. 

ARP advanced reinforced plastic CCPIA China Plastics Processing... 

Suppose the osmotic pressure under total pressure p is P, and let Arp be the change of total volume occurring when a mol of solute is dissolved under total pressure p. Let Yp be the change of volume of the system inside the osmotic apparatus when solvent is admitted so as to dissolve a mol of solute (cf. 188). 

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