Biochemistry
The Auto-Aquatrator last word in automatic water determinations
Journal of Medicinal Chemistry ftwnmi ofMtdmmd
(Jtfmist
COMPANION PERIODICALS IN T H E LIFE SCIENCES FROM T H E CHEMICAL POINT OF VIEW Read BIOCHEMISTRY each month for the results of original research in all areas of fundamental biochemistry. BIOCHEMISTRY'S subject matter covers enzymes . . . proteins . . .lipids . . . nucleic acids, as well as metabolism . . . protein synthesis . . . and many other topics of growing significance in biochemical research. Relationships among chemistry and the other biological sciences are emphasized. Read the bimonthly J O U R N A L OF MEDICINAL CHEMISTRY for the developments in chemical research related to medicinal agents and their effects on biological activity. Papers in JMC bring you unusual value since articles describing compounds are accepted only when the biological data are included. Typical subjects are the structural elucidation, preparation, and physical and chemical properties of biologically significant materials—the relationship of structure to activity—the transport and metabolism of drugs—and the mechanisms of the action of medicinal agents. Read B I O C H E M I S T R Y and the J O U R N A L OF M E D I C I N A L C H E M I S T R Y to learn about current chemical research concerned with the life processes . . . and the effects of biologically significant medicinal agents on t h e m . BIOCHEMISTRY—1 year: ACS members $16.00 All others 32.00 Additional postage: Foreign S I . 5 0 ; P0AS and Canada $1.00 JOURNAL OF MEDICINAL CHEMISTRY—1 year: ACS members 110.00 All others 20.00 Additional postage: Foreign SI.50; PUAS and Canada SI.00
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The Auto-Aquatrator, in a b r o a d range of a p p l i c a t i o n s , handles any o r g a n i c or inorganic to give y o u q u i c k , accurate and c o n sistent results — r e p r o d u c i b l e to ± 0 . 0 2 5 ml of titrant. Its b u r e t t e s e l e c t o r s w i t c h g i v e s y o u speed and a c c u r a c y w h e n running diversified s a m p l e s of high or low water content. A flip of the burette s w i t c h selects either the right or left burette for d i r e c t KF titrat i o n s — automatically p e r f o r m e d . No lost time r e p l a c i n g burettes, solutions, o p e n i n g and e m p t y i n g reaction vessel. A n d you can c h a n g e b a c k to t h e c o n v e n t i o n a l w a t e r methanol-KF set-up whenever you w i s h . More Auto-Aquatrator features: The s y s t e m is s e a l e d a g a i n s t a t m o s p h e r i c moisture, with a built-in v a c u u m p u m p to remove any humid air from the reaction vessel. Each burette has its o w n e l e c t r o magnetic valves, e m p l o y i n g an ethylenepropylene tetramer valve face which guarantees no leaks. Stop c o c k s are e l i m inated. " E n d point h o l d " is a u t o m a t i c and there is an adjustable automatic transfer from " c o n t i n u o u s " to " p u l s e " feed as end point is a p p r o a c h e d . Ask y o u r Precision Scientific Dealer or write for A u t o - A q u a trator Bulletin 642.
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VOL 40, NO. 2, FEBRUARY 1968
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169 A
