VW-R
Your Single S o u r c e of Filter M e m b r a n e s
& Apparatus
For the scientist doing separation and enrichment functions in ultrafiltration, microbiology, medicine, chemistry and industry . . . VW&R now offers the largest selection of membrane filter densities in the world. S&S MEMBRANE F I L T E R S are high quality modern filter media pre pared from cellulose de rivatives, p u r e cellulose, and other high molecular weight substances. D u e to their special characteris tics and properties, mem S ^ R ^ Colonies brane filters are quite dif of coliforms ferent from any other filter on Boc-T-Fiex B7 media. They are used for the collection, separation, and determination of sub stances of coarse and colloidal particle size, for the filtration of liquids or gases, for dialysis, osmosis and electrophoresis. These original filters have been per fected in conjunction with Membranfiltergesellschaft in West Germanv.
S&S Colonies ^ ^ of enterococci on Bac-T-Flex B7
The S&S Membrane Filter & Apparatus Catalog No. is available at your nearest VW&R branch.
S & S ELECTROPHORESIS SYSTEM POWER SUPPLY Delivers continuously variable voltage from 0-500 volts. Ripple is less than ± 0 . 1 % and apparatus is stable to within ± 0 . 1 % . Double scale meter shows both voltage and current ( A ) . Incorporates a built-in timer with automatic shut-off device. Will operate four electrophoretic chambers simultaneously. Tins S\s(i in will meet all the requirements of research ers and clinicians who desire accurate methods and highest quality materials in their work.
ELECTROPHORESIS CHAMBER Constructed of high impact polystyrene. Contains a water cooling jacket and close fitting see-thru domed lid enabling clear observation at all times. Safety inter lock system assures that power is automatically turned off when lid is removed. Platinum wire electrodes run entire length of chamber. Polarity reversing switch. Application Guide rail for perfect sample placement. Also features Stainless Steel "Lift-Drop" sample appli cator and Fixed T-Bar Fasteners for membrane strips. 27400
ELECTROPHORESIS CHAMBER, S & S M o d e l E A - l . . . . E a .
215.00
27401-00
POWER SUPPLY CONTROL, S & S M o d e l EA-4....Ea.
27401-01
POWER SUPPLY CONTROL, S & S M o d e l EA-2 0 - 5 0 0 volts continuously v a r i a b l e . Regulated to better than ± 1 . 0 % . Ripple less t h a n ± 0 . 5 % . ..Ea. 2 2 5 . 0 0
425.00
CELLULOSE ACETATE MEMBRANE, S & S No. 2500 27402-01 27402-05
Size: 1 " χ 6 % " Size: l " x 1 2 "
5 0 in Box 9 . 0 0 5 0 i n Box 2 1 . 0 0
Write for the Handbook that gives the complete story on the Sù-S System plus methods for regular electrophoresis, Immunoelectrophoresis and bidimensional electrophoresis.
VAN WATERS & ROGERS
VW&R
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P H I N T I D IN U S J
