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(89) T. L. Newirth, M. A. Diegelman, Ε. Κ. Pye, and R. G. Fallen, Biotechnol. Bioeng., XV, 1089 (1973). (90) H. H. Weetall and M. A. Jacobson, Proc. IV IFS Ferment. Technol. Today, 361 (1972). (91) R. A. Messing, Biotechnol. Bioeng., XVI, 525 (1974). (92) W. Dritschilo and M. K. Weibel, Bio- chem. Med:, 11, 242 (1974). (93) H. Filippuson, W. E. Hornby, and A. McDonald, FEBS Lett., 20, 291 (1972). (94) W. J. Blaedel and T. R. Kissel, Anal. Chem., 47, 1602 (1975). Presented in part at the Benedetti-Pichler Award Symposium honoring Petr Zuman at the Second Annual Federation of Analytical Chemistry and Applied Spectroscopy Societies Meeting in India- napolis, Ind. Larry D. Bowers was borii in York, Pa. He received a BS degree (chemis- try) at Franklin and Marshall College in 1972 and a PhD (analytical chemis- try) at the University of Georgia in 1975. Presently, he is a postdoctoral associate in the Department of Clini- cal Pathology at the University of Or- egon Health Science Center in Port- land. Dr. Bowers is the author or coau- thor of 10 scientific papers. ill Bis Peter W. Carr was born in Brooklyn, N.Y. His bachelor's work was carried out under the direction of Louis Meites at the Polytechnic Institute of Brooklyn. In 1969 he received a PhD in analytical chemistry at the Penn- sylvania State University working under the direction of Joseph Jordan. A postdoctoral associate of David Click in the Pathology Department of the Stanford University Medical School from 1968 to 1969, he joined the Chemistry Department of the Uni- versity of Georgia in September 1969 and is presently an associate profes- sor. Dr. Carr has authored or coau- thored some 45 papers in electroanaly- tical, thermoanalytical, bioanalytical, and clinical chemistry. FESAMSEM ? FESAMSEM? The name's a bit strange, but researchers in small particles, thin films, and other surface phenomena may find FESAMSEM the most useful new scientific tool of this decade. FESAMSEM's full name is Model 2000 Field Emission Scanning Auger Microscope/Scanning Electron Microscope. In this one instrument, the researcher can do Auger surface elemental analysis and imaging, and electron micrographie surface geometry studies on a single particle or micro-area. FESAMSEM sets new standards for Auger performance. For example, Coates & Welter's unique new high performance field emission electron gun packs 200 nanoamperes into a 0.3 micron spot. . .for the highest Auger spatial resolution ever achieved! And the SEM is no lackluster performer either. . . with 60Â resolution, magnification up to 200,000χ, and all the speed, convenience and sample protection benefits of Coates & Welter TV-rate scanning. Because efficient Auger analysis requires high current density and high-resolution electron microphotography requires ultra small spot size, only a field emission electron gun provides outstanding performance in both analytical modes. That's why FESAMSEM bears the Coates & Welter nameplate. We pioneered field emission technology... and every one of the nearly 200 CWIKSCAN® SEM's we've built incorporates a field emission electron gun. FESAMSEM Model 2000 Electron Optical Column FESAMSEM is a full-capability Auger system, with a retractable cylindrical-mirror analyzer, ion etching gun and secondary electron detector in an all-metal sealed multi-port sample chamber. Our new FESAMSEM brochure describes it all in detail. After you read it, we think you'll be convinced that Coates & Welter is much better at building innovative instruments than naming them. COATES WELTER 777 North Pastoria Avenue, Sunnyvale, CA 94086, 408-732-8200 A subsidiary of American Optical Corporation © FESAMSEM copyright Coates & Welter, Inc. CIRCLE 33 O N READER SERVICE CARD ANALYTICAL CHEMISTRY, VOL. 48, NO. 7, JUNE 1976 · 559 A
