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Page 1: Princeton Applied Research Corporation

1HE High Frequency Lock-in Amplifier from 1HE Leaders in Signal Processing Technology

O N L Y the 5 2 0 2 can prov ide y o u w i t h :

Ί 0 0 k H z - 5 0 M H z ope ra t i on * 10 μ \ / fu l l -scale (FS) sens i t iv i ty

2 0 0 0 : 1 d y n a m i c reserve * Two-phase ope ra t i on ' O p t i o n a l Vector /Phase o u t p u t ; O p t i o n a l A / B , log A or log

A / B o u t p u t

F ind ou t now how the Mode l 5 2 0 2 can s i m p l i f y , solve or s t reaml ine y o u r h igh f r equency measurement p rob lems .

Wr i te or call t o d a y f o r more i n ­f o r m a t i o n . P r ince ton A p p l i e d Research C o r p o r a t i o n , P.O. Box 2 5 6 5 , P r i nce ton , New Jersey 0 8 5 4 0 ; p h o n e : 6 0 9 / 4 5 2 - 2 1 1 1 .

PRINCETON APPLIED RESEARCH

Circle 175 For Add i t i ona l I n fo rma t ion Only Circle 176 To Have a Salesman Call

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Contact your Lab Supply Dealer or write to:

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Books

view the principles of lasers, nonlinear Raman effects, infrared fluorescence, and tunable infrared lasers. Section Β contains six articles on experimental methods such as Fourier transform spectroscopy, matrix isolation, tech­niques for studying highly reactive species and high-temperature species, trace analysis by infrared spectrosco­py, and resonance Raman spectrosco­py. The seven articles in Section C on theoretical methods cover isotope sub­stitution, analysis of infrared bands of different intensities and different con­tours, and force constant calculations. The last section on applications of in­frared spectroscopy to solving prob­lems in molecular structure contains eight articles devoted to a review of vi­brational spectra of solids, transition metals, metal carbonyls, rc-alkane and polyethylene compounds, polymers, nucleic acids and proteins, and some model compounds of heme proteins.

Analytical and Quantitative Methods in Microscopy. G. A. Meek and Η. Υ. Elder, Eds. 276 pages. Cambridge Uni­versity Press, 32 East 57th St., New York, N.Y. 10022. 1977. $24.95, hard­bound; $8.50, paperbound

This seminar series was initiated by the Society for Experimental Biology to aid research biologists. The aim is to acquaint the traditional biologists, accustomed to dealing only in qualita­tive aspects, with the recent analytical methods that can be applied to estab­lished techniques of microscopy to ob­tain accurate quantitative informa­tion. Topics of 13 chapters are: intro­duction, stereology, optical diffraction analysis of periodically repeating bio­logical structures, quantitative fluo­rescence microscopy, quantitative image analysis, integrating micro-densitometry, scanning microinter-ferometry, potential of the scanning transmission electron microscope in biology» scanning transmission elec­tron microscopy at high resolution, microanalysis of biological material using electron energy loss spectrome­try, energy dispersive x-ray microanal­ysis, wavelength dispersive x-ray mi­croanalysis in biological research, and the use of ultrathin frozen sections for x-ray microanalysis of diffusible ele­ments.

Fate of Pesticides in Large Animals. G. Wayne Ivie and H. Wyman Dorough, Eds. χ + 270 pages. Academic Press, Inc., 111 Fifth Ave., New York, N.Y. 10003. 1977. $14.50

The contents of this volume are de­rived from a symposium on the fate of pesticides in large animals sponsored by the Pesticide Chemistry Division of

CIRCLE 204 ON READER SERVICE CARD

380 A · ANALYTICAL CHEMISTRY, VOL. 50. NO. 3, MARCH 1978

AN EG&G C O M P A N Y