Arthurs

Arthur Amos Noyes Laboratory of Chemical Physics, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA... 

ARTHUR RUDOLF HANTZSCH great chemist and teacher and pioneer of thiazole chemistry... 

Metal-ammonia-alcohol reductions of aromatic rings are known as Birch reductions, after the Australian chemist Arthur J Birch who demonstrated their usefulness begin nmg m the 1940s... 

The circle mnemonic was de vised by Arthur A Frost a theoretical chemist at North western University... 

In one of the earliest mechanistic investigations m organic chemistry Arthur Lapworth discovered m 1904 that the rates of chlorination and brommation of acetone were the... 

Arthur Michael for whom the reaction is named was an American chemist whose career spanned the period between the 1870s and the 1930s He was independently wealthy and did much of his research in his own private laboratory... 

In 1997, UOP announced the PX-Plus process which also uses a selectivated catalyst to convert toluene to para-rich xylenes. Pina commercialized a TDP process known as the (T2PX) process in 1984 (70). It uses a proprietary catalyst to react toluene at 42—48% conversion with selectivities to benzene of 42 wt % and to xylenes of 46 wt %. The xylenes produced are at equiUbrium. Typical commercial operating conditions of 390—495°C, H2 partial pressure of 4.1 Mpa, H2/hydrocarbon molar ratio of 4 1, and LHSV of 1—2/h. Pina s first commercial implementation occurred in 1985 at their Port Arthur refinery. 

Flavor Description. TypicaHy, a sensory analyst determines if two samples differ, and attempts to explain their differences so that changes can be made. The Arthur D. Litde flavor profile (FP), quantitative descriptive analysis (QDA), and spectmm method are three of the most popular methods designed to answer these and more compHcated questions (30—33). AH three methods involve the training of people in the nominal scaling of the flavor quaHties present in the food being studied, but they differ in their method for quantitation. 

Leslie J. Friedman C. Gail Greenwald Arthur D. Little, Inc. 

J. L. Greeno, G. S. Hedstrom, and M. DiBerto, The Environmental Health and S afety Auditors Handbook, Arthur D. Litde, Cambridge, Mass., 1988. 

---