Record weight changes at pressures as low as 10 10 TORR
Manufacturers' Literature Company Periodicals Requests for copies of the following publications, catalogs, etc., should be sent directly to the address shown. Business or professional letterheads are requested. Disc Electrophoresis Newsletter, No. 11, April 1969. Several types of sepa rations, recent clinical developments, and new equipment and accessories are presented. Canal Industrial Corp., 5635 Fisher Lane, Rockville, Md. 20852 Modern Precision, Vol. 29, No. 1. This issue includes an article discussing the use of IR analyzers to monitor CO in automobile tunnels. Leeds and Northrup, Sumneytown Pike, North Wales, Pa. 19454
Sensitivities down to 1/10th MICROGRAM Loads up to 100 GRAMS Precision up to ONE PART/10 MILLION of sample
Information, No. 68. Flame photo metric methods of analysis and elec tronic data processing in connection with optical analytical instruments are among the topics discussed. Carl Zeiss, Inc., 444 Fifth Ave., New York, Ν. Υ. 10018
Chromatography Lipids, Vol. 3, No. 2. Additional information is given on PPE-20, a polyphenyl ether stationary phase, and a number of new products are listed. Supelco, Inc., P.O. Box 628, Beliefonte, Pa, 16823
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Infrared News, No. 1, April 1969. Model H1200 Infragraph, an infrared double-beam spectrophotometer, is de scribed and illustrated in this issue. Wilks Scientific Corp., South Norwalk, Conn. 06856
Information, No. 69. A discussion of the IPM 2 integrating photometer, an instrument for exacting weight determi nations of objects at or below the re solving power of light microscopy, is presented in this issue. Carl Zeiss, Inc., 444 Fifth Ave., New York, Ν. Υ. 10018
RECORDING ELECTROBALANCES
JUST HATCHED AT BIO-RAD
MPI Applications Notes, Vol. 4, No. 3. Double-beam photometry is discussed in this issue. Principles, instrumenta tion, sources of error, and the use of the logarithm of absorbance for quali tative analysis are covered. McKeePedersen Instruments, P. O. Box 322, Danville, Calif. 94526 Current Laboratory Practice, Vol. 1, No. 3. A screening method for gamma globulinopathies using Sepraphore III cellulose polyacetate support medium is presented. Gelman Instrument Co., 600 S. Wagner Rd., Ann Arbor, Mich. 48106
T h i s 5 6 p a g e c o m p e n d i u m of chromatographic information fea tures new applications sections on B i o - R a d m a t e r i a l s for ion ex change, gel filtration, and adsorp tion. In addition, you will find im portant and hard-to-find data on the latest work in the chromatog raphy of proteins, including ma terials and systems for the synthe sis and degradation of peptides. To get your free copy of " U " , please fill out the coupon. Gentlemen: please send me Price List "U". Dept. A-5 Name Organization Street
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VOL. 4 1 , NO. 8, JULY 1969
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