VOLUME 25, NO. 1, JANUARY 1 9 5 3
Spinco
Model
39 A
&
ANALYTICAL ULTRACENTRIFUGE
standard
throughout the world
A RESEARCH T O O L for the centrifugal purification and molecular-weight determina
refrigerating system for keeping ro
tion of such macromolecules as proteins,
tors at controlled temperatures; and
viruses, polymers, enzymes, hormones, and
vacuum pumps which provide atmos
chemical precipitates; the Spinco Model Ε
pheres down to 10'4mm of mercury.
Ultracentrifuge combines all operations in a single cabinet.
CONTROLS AND INSTRUMENTS are included to maintain average drive-
OPERATING FEATURES include a
speed accuracy automatically within 0.1
70,000 -rpm quiet electric drive designed for
per cent of setting; to set operation of
years of service and arranged for easy removal
automatic camera both for exposure and
and exchange; a selection of analytical and
photo-interval; to read rotor tempera tures; to select one of three graded brak
preparative rotors which are interchangeable
ing rates; to read motor voltage and
and provide forces up to 260,000 times grav
current; to read vacuum; and to actuate
ity operating in a heavily-armored vacuum
the camera manually. Interlocks are pro
rotor chamber; an optical system of the
vided to insure safe operation by indi
Philpott-Svensson refractive-index type with
viduals without extensive training.
viewing screen, automatic camera, and high-
Send for
intensity light source for analytical work; a
complete
SPECIALIZED I N S T R U M E N T S
CORPORATION
607
O'NEILL
AVE.
·
ΒΕLMΟΝΤ,
details.
CALIFΟRΝIA
