MANUFACTURERS' LITERATURE
Vertical Gel Electrophoresis. T e c h n i cal Bulletin 128, 16 pages, shows g r a p h i cally the techniques for using this lab oratory instrument. E - C Apparatus Corp., 755 St. M a r k s St., Philadelphia, Pa. 19104 60I
w h a t o n e i n s t r u m e n t gives y o u a n a m i n o acid and nucleic acid analyzer w i t h a sensitivity of 5x10" 10 moles?
the* new DAWDAWDWA
Fluorine Compounds. "Ozark's A n nual Shelf-Clearing L i s t , " 4 pages, is a collection of nonroutine fluorine com pounds. O z a r k - M a h o n i n g Co., 1870 S. Boulder, Tulsa, Okla. 74119 602 Gas Chromatographs. Catalog S54411 discusses M o d e l G C - 3 A L for analy sis of gas and liquid samples having l o w boiling points. Catalog S54-413 fea tures M o d e l G C - 3 A H for high tempera ture analysis. Catalog S54-415 de scribes M o d e l G C - 3 A F for exclusive use w i t h hydrogen flame ionization detec tor. Catalog S54-417 presents M o d e l G C - 3 A E for exclusive use w i t h electron capture detector. AIL catalogs are four pages. Shimadzu Seisakusho Ltd., For eign Trade Dept., 18 N i s h i n o k y o - K u w a baracho, N a k a g v o - k u , K y o t o , Japan 603
Indicator Papers, Reagent Papers, and Test Papers. This 16-page bro chure presents the indicator, reagent, and test papers manufactured b y Macherey-Nagel & Co., D u r e n , Ger many. These products are now avail able i n the U . S. Gallard-Schlcsinger Chemical M f g . Corp., 584 Mineola Ave., Carle Place, L . Ι . , Ν . Υ . 11514 604 Filter P a p e r C h a r t .
This 8Va"
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chart shows various filter paper sizes for a variety of filtering devices. Reeve Angel, 9 Bridewell Place, Clifton, N . J. 07014 605 O r g a n i c F l u o r i n e C o m p o u n d s . Cata log F-16, 32 pages, lists nearly every available fluoro-organic compound and contains a four-page section on highly fluorinated inert fluids. Pierce C h e m i cal Co., P. O. Box 117, Rockford, 111. 61105 6O6
The JLC-3BC is a dual-detection* amino acid analyzer with a sensitivity of 5 χ 10" 10 moles highest on the market today! Nearest available sensitivity—merely 5 x 1 0 s moles is found only in instruments casting twice the low price of the JLC-3BC. * UV detector for proteins and nucleic acids-visible Sight detector for amino acids.
THE JLC-3BG ALSO OFFERS THESE 7 EXCLUSIVE FEATURES: • 10-second sample application time,., other i n s t r u m e n t s average about l O m i n u t e s . + Constant eluent flow rale guaranteed..· precision mechanical valves e l i m i n a t e the bubble and backspill common t o other instruments. • Excellent stability—± 2ψα/Ι0 hours... superior pump e n g i n e e r i n g provides effi cient long-term l a b o r a t o r y o p e r a t i o n . • Accurate quantitative analysis is simple to perform... l i n e a r scale in the high sensitivity r a n g e affords a much s i m p l e r and more accurate quantitative analysis than the l o g a r i t h m i c scale alone. φ Extremely hifth reproducibility — .??&... w i t h its constant-flow pump and highsensitivity amplifier, plus r e a c t i o n bath temperature control, i t outperforms all others i n r e p r o d u c i b i l i t y . • Eluents contact Teflon and glass only... o r d i n a r y i n s t r u m e n t s w i t h pumps of r u b b e r , metal or other m a t e r i a l s are m o r e suscep
tible to c h e m i c a l s . • Modular design,,« the J L C - 3 B C consists of separate independent u n i t s f o r easy c o n t r o l servicing.
Sample: a m i n o acid mixture Sample volume.5 x l O - 1 0 moles Eluent, 0 . 3 5 N No-Citrate- buffer Temperature: 50°C. Fixed pnose: A m i n e x A - 5 O p t i c a / path: 10 m m
PH
and and
5.28
JAPAN ELECTRON OPTICS LABORATORY CO., LTD. Marunouchi, Chiyoda ku F Tokyo, Japan
Pofarimefers. B u l l e t i n N o . 3, 4 pages, describes t w o new polarimeter models, SR-5 and SR-6. Polyscience Corp., 009 Pitner Ave., Evanston, I I I . 60602 607
JEOLCO ( U . S . A . ) , INC. Application Centers at Medford, Massachusetts and Burlingame, California
JOEL
JEOLCO (EUROPE) SA 16 Avenue de Colmar 92 Rueil-Malmaison, (Paris), France
JEOLCO (AUSTRALASIA) PTY. LTD. 1 Help Street, Chatswood Sydney, N S W . , Australia Circle Nt. SI on Readers' Service Card
V O L . 39, N O . 14, DECEMBER 1967
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