NO MORE VlBffKîlONS
A new Peptide-former
N-ETHYL-5-PHENYLISOXAZOLIUM3'-SULF0NATE (Woodward's Reagent K)
TO AFFECT YOUR WEIGHING PROCEDURES
Woodward's Reagent K, manufactured by PILOT, functions as a peptide bond former by combining with the acid group of one amino acid or peptide to form an χ/ γ 'Ν'-Et active ester. This ester bond is then broken by the amino group of a second amino acid or peptide ester with concurrent formation of a peptide and a water-soluble by-product. The new procedure is simple and fast, gives excep tionally high yields of very pure peptides free from by-products and without appreciable racemization. Also available from PILOT are synthetic polypep tides. For more information, write to 591-A.
TEST TRY FREE THE NEW
BRINKMANN-SARTORIUS BALANCE TABLE
PILOT
Your vibration troubles with analytical and micro balances are over — o r greatly reduced with the Brinkmann-Sartorius AntiVibration Balance Tables or Wall Brackets.
CHEMICALS, INC.
•
EASILY INSTALLED • REASONABLY PRICED * SINGLE AND MULTIPLE UNITS Your local laboratory supply house will arrange for free trial delivery or write: Brlnkmann Instruments, Inc., Cutter Mill Road, Great Neck, L. Ι., Η. Υ.
36 Pleasant St., Watertown 72, Mass.
Circle No. 209 on Readers' Service Card
Circle No. 23 on Readers' Service Card
On
D i s p l a y hy
Ù#P8BR(r
Booth 40, Pittsburgh Conference SILÏEMP, Lindberg's new solid s t a t e p o w e r c o n t r o l s h o w n in o p e r a t i o n with laboratory size furnace. S I L T E M P provides precise t e m p e r a t u r e control by proportionating power a n d is designed for regulation of t e m p e r a t u r e of r e s i s t a n c e t y p e furnaces, m o t o r control, light intensity regulation and static switching.
MORE from STRIP CHARTS
HOT PLATES: for every laboratory need . . . portable or installed types . . . rectangular or round . . . in temperat u r e r a n g e s from 1 2 0 ° F . t o 9 5 0 ° F .
Royson Identicharts provide remote control printing
BOX FURNACES: a wide line of units with t e m p e r a t u r e ranges t o 3000°F. C o m e in and see these featured plays berg's
and let us tell you about full line of quality
disLind-
equipment.
GET
with
Royson Identicharts
of time a n d date, sequence numbers, counter r e a d ings, code symbols or other data on strip charts. • • • •
They eliminate chart watching and marking Eliminate human error from chart marking Permit quicker, easier interpretation Correlate recorded data in different recorders
• •
Operate on AC or DC voltage from 24 to 115 volts Come in easily installed kit form
Laboratory Equipment Division
Write, wire or call for full details Territories still open in New York State and New England
LINDBERG ENGINEERING COMPANY
ROYSON ENGINEERING HATBORO,
PA. O S b o r n e
2455 W. Hubbard Street, Chicago 12, Illinois Circle No. 73 on Readers' Service Card 164
A
·
Circle No. 129 on Readers' Service Card ANALYTICAL CHEMISTRY
5-2800
