Meetthenew Teflon®Dilutor from Brinkma41v€¦ · that can handle any job you'll probably ever have. Or dial direct, toll free: (800) 228-4250 (continental U.S.A. except Neb-raska)

Meetthe newTeflon®Dilutorfrom Brinkma41v

Combine the advantages of a single-stroke dilutor with the many outstanding

I features of the popular Brinkmann Dispen-settea. The result is the new BrinkmannDiluette, a bottle-top dilutor that's incrediblyrugged, accurate and easy to use.

Diluette has Teflon-coated plungers.Both reagent and sample cylinder plungersare Teflon-coated to minimize 'freezing' and'sticking' common to all-glass designs when\ dispensing alkalis. Diluette works smoothly

with most reactive chemicals.Diluette has no fragile glass

tubing. The Diluette design elimi-nates fragile external glassware that

, could easily break or chip. Filling anddischarge tubes are flexible Teflonand can be cut to any desired length.

Dilueffe fits on virtually any bottle.Diluette mounts directly on any 33mmscrew-neck reagent bottle, and on mostother size bottles, cans or containers,

even STJ 24/40 and 29/42 glassware, usingoptional screw-in adapters.

Diluette will dilute or dispense. To di-lute, simply set the two adjustment knobsfor desired Sample and Reagent volumes.Using one hand, lift the cylinder housing tofill, and depress to empty. Diluette may alsobe used only to dispense. Choose from 3adjustable models: 0.02-0.1 ml sample/0.4-2ml reagent; 0.02-0.1 ml sample/ 1.0-5mlreagent; and 0.1-0.5ml sample/1.0-5mlreagent. Accuracy is +1.0% or better;reproducibility is +0.2% or better.

For literature, write: Brinkmann Instru-ments, Inc., Cantiague Rd., Westbury, N.Y.11590. In Canada: Brinkmann Instruments(Canada), Ltd.

mI BrinkmannnDiluettee

Available from:Ace Scientific/Beckman Instruments, Science Essentials Operations/Bio-Rad LaboratoriesCole-Parmer Instrument Co./Curtin Matheson Scientific/Fisher Scientific/General ScientificMarkson Scientific/Preiser Scientific/Sargent Welch/Scientific Products/SGA ScientificArthur H. Thomas/VWR Scientific/Wilkens-Anderson Co.Circle No. 102 on Readers' Service Card

11-Subui- ~~~~~~Mol. V

Cytochrome C, methylated, [methyl-14C]- 12,30(Horse heart) NEC-716Carbonic anhydrase, methylated, 30,00[methyl-14C]- (Bovine erythrocytes) NEC-718Ovalbumin, methylated, [methyl-14C]- 46,00(Hen's egg) NEC-717Albumin, methylated, [methyl-14C]-(Bovine serum) NEC-719Phosphorylase B, methylated,[methyl-14C]- (Rabbit muscle) NEC-727

initNt.0

0

0

69,000

92,500

Packaged: 1,ACi and 5/LCi in dry ice.

Not for use in humans or clinical diagnosis.

III New England Nuclear549 Albany Street, Boston, Mass. 02118Call toll-free: 800-225-1572(In Massachusetts and Intemational: 617-482-9595)

NEN Chemicals GmbH, Dreieich, W. Germany; NEN Canada Ltd., Lachine, QuebecCircle No. 50 on Readers' Service Card

I

I_

Heflma-the largest assortment of highest*preciso gasndquartz cells.Standard* Flow-through Constant-temperatureAnaerobic. Special DesignsAlso available-ULTRAVIOLET LIGHT SOURCESDeuterium Lamps* Mercury Vapor LampsHollow Cathode Lam'ps* Power Supplies

II~~IIA...L Write for literature~ EVE Box 544

Borough Hall StationCELLS, I N CI Jamaica, New York 11424

Phone (212) 544-9534

Circle No. 10 on Readers' Service Card

The fraction collectorwith built-out obsolescence

This is the fraction collectorthat will do practically any jobyou may have today, or tomor-row, or five years from now. Itholds 380 little tubes; 135 big,big (70 ml) tubes; or even 28 mmscintillation vials. The RetrieverIll gives you versatile pushbuttonprogramming with time, drop orVolumetric mode selection. Allelectronics are protected fromspills, coldroom condensation,and memory loss during powerfailure.Options include a delay timer

to compensate for effluent vol-ume between the detector andfraction collector, and a driplessflow interrupter valve that actu-ally retracts hanging drops toprevent their falling betweentubes. If you should have a spill,

you can lift off and submerge theentire mechanism tray for clean-ing.Send for your ISCO catalog to

learn about the fraction collectorthat can handle any job you'llprobably ever have. Or dialdirect, toll free: (800) 228-4250(continental U.S.A. except Neb-raska). Instrumentation Special-ties Company, P.O. Box 5347,Lincoln, Nebraska 68505.

Instruments with a difference


575

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10 NOVEMBER 1978

The newNikon Optiphot.A researchmicroscope withoptics, design, andcapability beyondanything in its class.

Never before has anyone offered an in-termediate research microscope withsuch optical performance and broadversatility as the new Nikon Optiphot. Itsrevolutionary CF optics, completely newstand, convenience, and limitless modu-larity are unsurpassed by any microscopein its class. Seventeen patents are pend-ing on the Nikon Optiphot, so advancedis its design.

An outstanding feature of the Opti-phot is the magnificent new Nikon CFchromatic-aberration-free optics, madepossible by Nikon's newly developedExtra-low Dispersion (ED) glass, inte-grated multi-coatings, and totally newlens design for unprecedented imagequality, brightness, resolution, colorfidel-ity, and freedom from distortion. NikonCF optics are, quite simply, incomparable.

The advanced design of the Opti-phot goes beyond optics. An entirely newcoaxial focusing mechanism is sealedagainst dust and moves on roller bear-ings for precise positioning and trouble-free operation. The 12-volt, 50-wattquartz-halogen Koehler illumination sys-tem covers all magnifications withoutchange or adjustment and provides in-


tense, even illumination with perfect colorrendition.

An array of options are available:Five different binocular and trinocularbody tubes, rectangular mechanical androtatable circular stages, a variety of con-densers, and CF objectives over a mag-nification range of 1x to 1 00x.

The Optiphot's modularity permitsphase contrast, Nomarski differential in-terference contrast, incident fluores-cence, and dual viewing. The Optiphotalso accepts the full line of Nikon photo-micrographic accessories for the mostsuperb photomicrographs you have everseen.

Let the instrument convince you.For complete details and a demonstra-tion, ask Nikon Incorporated, InstrumentDivision, Ehrenreich Photo-Optical In-dustries, Inc., 623 Stewart Ave., GardenCity, N.Y. 11530; (516) 222-0200.

Look to Nikon

Blicken Sie auf Nikon

Acid Hydrolysates, Eluates,Extracts, Dialysed Solutions,Preparing Samples for GLCor HPLC in BiomedicalResearch, Clinical Chemis- /try, Radioimmunoassays,Mass Spectromotry.

BECAUSE 100% samplerecovery. . . Evaporatesand concentrates at thesame time... No splash...No smearing ... 20 to 100samples at one time.SIMPLE OPERATION- Load 20 to 1 00 sam-

ples in the rotor, close lid,turn to"on"and turn vacuumpump "on".HOWELSE can you evaporate and

concentrate small volumes of biolo-gical samples in quantity at one timewith maximum efficiency?ANSWER - There is no other way!

Send for illustrated literature to:SAVANT INSTRUMENTS, INC.221 Park Ave.Hicksville, N.Y. 11801Phone: (516) 935-8774


These Swift research qualitymicroscopes have a shorter arm andlower profile . . . promise (and de-liver) peerless resolution . . . areeasily and quickly interchangeablewith Swift accessories. These in-struments are meticulously designedto meet all requirements of medicaland other advanced biological sci-ence areas. Optics are of particu-larly high caliber. Binocular headis rotatable 360°. Stage is raisedand lowered uniformly on precision

ball bearings with no lateralmovement. Patented clutch

mechanism operates automaticallyto prevent damage to finely bal-anced gear train. Coarse focusinglock can be pre-set to prevent slidebreakage. Fine focus control op-erates continuously throughout theentire range of magnification.

Even with its many built-inpreventives for excessive wear andtear, and its extraordinary researchfeatures, the M1000 Series is sur-prisingly moderate in price. Writetoday for price list with variableoptions in components, and nameof nearest dealer for demonstration.

Look to theSwift M1000 Series for some

great new dimensions

SWIFT INSTRUMENTS, INC.Scientific Instrument DivisionP.O. BOX 562, SAN JOSE, CA 95106 * 408/293-2380(MAIN OFFICE: Boston, MA)

SWIFT AGENCIES are located throughout the U.S. and in most foreign countries.


(4

V10 NOVEMBER 1978 653

Unitron's

Model ZSB zoom stereomicroscope

A big 6:5 to 1 ratio zoom opticalsystem. Excellent resolution andcontrast even at high powers. From7X to 45X with 1OX eyepieces. Aslow as 3.5X or as high as 180X withaccessories. And there's a bigchoice of accessories. . eye-pieces, lens attachments, reticles,transmitted light base, illuminators,polarizing attachment and more.

Ask for free literature:Unitron Instruments, Inc.,101 Crossways Park West,Woodbury, NY 11797, U.S.A.Phone (516) 364-8046

U1/YVI7/ON The value line

Subsidiary of Ehrenreich Photo-OpticalIndustries Inc


-760C _

Ultra-Cold.-960CPT17Ultra-Coll er.

Both from Kelvinator Commer-cial. Upright drops to -76°C.Ultra-cold. Chest model dipsto -96°C. Ultra-colder. Up-right's six French doors open

individually. And you canlabel each door to know what'sinside. Easy labeling for what's - -under the chest's stainless steelsliding lids, too. Want more? -Automatic alarm systems? 2"2portholes for recorders? TheKelvinator Commercial name?You got them. Don't be caughtin the cold without ultra-cold.Contact J. E. Hirssig at Kelvinator \UCommercial, the company that knowshow to give you 12 cubic feet of the best cold you ever had.lpright tJC-110 (-760C/-1050F) Chest IJC-522 (-850C/-1200F)Chest UJC-542 (-960(,/-1400F)

621 Quay Street * Manitowoc, Wisc. 54220 * (414) 682-0156

One of the White Consolidated Industries


LI ISI ESITIagck~~SILO g n

BIOSI' - ---

TYPE OF LITERATUREAnnual ReportsBIblioraphiesBook ChaptersBook Reviews (New Books)Data ReportsLettersNomenclature RulesNotesReview JournalsResearch Journals (Serials, Including

Original Russian Language Journals)Russian Language Journals (English

Translation)Symposium AbstractsSymposium -Papers

In 1978, Biological AbstractsR will provide 149,000 abstracts;BioResearch Index® will provide 113,000 citations.For up-to-the-minute reports in all life science research areas,consult BOTH Biological Abstracts®) and BioResearch Index.®)For details, write BIOSIS Marketing Bureau, 2100 Arch Street, Philadelphia, Pa. 19103 U.S.A.

10NOVEMBER 1978 Circle No. 6 on Readers' Service655

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Circle No. 6 on Readers' Service Card10 NOVEMBER 1978 655

Push a Button... DetermineParticle Size in Solution

Complete laser light scattering instrument,featuring the Computing Autocorrelator:

The only system which can determinediffusion coefficient and particleradius (Angstroms to microns) withoutan additional computer. Affordable.

l0[~TCL RO.Box6463° NITECOLI Santa Barbara, CA 93111__0_NSTRUMENTS (805) 685-3036


HIGHEST SPECIFIC ACTIVITY AVAILABLE.FOR USE IN PROTEIN SYNTHESIS, PEPTIDEMAPPING, AND PROTEIN SEQUENCING.

Cystine, L-[35S]- >300Ci/mmolAqueous hydrochloric acid solution(pH-2):ethanol, 9:1, shipped in dry ice.NEG-020 1mCi 5mCi

Not for use in humans or clinical diagnosis

New England Nuclear549 Albany Street, Boston, Mass. 02118Call toll-free: 800-225-1572(In Massachusetts and Intemational: 617-482-9595)

NEN Chemicals GmbH, Dreieich, W. Germany; NEN Canada Ltd., Lachine, Quebec


What's new in Forma bio-freezers?Plenty. Forma's designed an ex-clusive refrigeration system that'sguaranteed to operate at designoperating temperatures as low as-850C in a warm +90°F ambient... no other manufacturer makesthat guarantee. We've added aunique energy saving control cir-cuit to lower operating costs. We'Vebuilt in a self-charging batterypowered alarm system that no onecan outsmart.Other thI, though, don't change.Like our rugged cabinet construc-tion with high-density foamed ure-thane insulation, our embossedaluminum liner that delivers morecold to your stored product, andour super slow warm-up timesthat buy time when the powergoes off.That's why we say Forma Bio-Freezers are built for productsafety from the inside out.

Forna ScientificDIVISIONz OF MALLINCKRODT, INC.BOX 649 MARIETTA. OHIO 45750 TELEX 24-5394TOLL FREE USA 800-848-3080. OHIO 614-373-4763


I

65710 NOVEMBER 1978

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liAr 17

The AAAS Calendar for 1979, thesecond in an annual series, is beauti-fully adorned by spectacular and un-usual color and black & white coversfrom Science. This useful wall calendarIs ideal for noting your appointmentsand remembering important dates inscience. In a 12" X 13" format, the1979 Calendar presents high qualityreproductions on a glossy, heavypaper stock.

The AAAS Calendar makes anidedl gift!

Order your Calendar today andbe prepared for the year ahead.

Price per calendar. $5.00

For your copy of the 4978 AAAS ScienceCoverCalendar, which will be mailed In November,send your name and address (plus remittance)to

AAAS Calendar1515 Massachusetts Avenue, NW

Washington, D.C. 20005

* members deduct10% off retail price.

10 NOVEMBER 1978

I

[32p]

N;ucleotidesNeed productsthat are consistentbatch-to-batch?Then why nottry ours?Because that's just what our cus-tomers are telling us about our[32P]Nucleotides! We alreadyknew-because for more than ayear we have checked every batchof our [32P]Nucleotides by themost modern technique available:

High HighPress~ure PurityLiquid for LibeIedChroma- Coem-,to~py- kals

and we have studied their stabilityand storage too, so that you don'thave to use the products the daythat you receive them.

When purity and stability-that isconsistency-are important,order from Amersham.

Write or ii Customer Service toplace you order and to obtain yourcopy ofor [32P]Nucleotide Availa-bilit. Idule.

AMERSHAM'CORPORATION:A SUBSIDIARY Of THE RADIOC(EMICAI C(ENTRE2636 S. Cleatbrook Dr., Arlington Heights, IL 60005312/364-71DO or 800/323-9750 (ToIl-fee1)

In Canada505 Iroquois Shore Rd., Oakville, ONT L6H 2R3416/842-2720or 800261-5061 (Toll free).


I I661

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Documents

Meetthenew Teflon®Dilutor from Brinkma41v€¦ · that can handle any job you'll probably ever have. Or dial direct, toll free: (800) 228-4250 (continental U.S.A. except Neb-raska)