In this room at the Donner Laboratory of the University of California can be seen perhaps the world's greatest concentration of usable, controllable centrifugal force. Eight Spinco
Ultracentrifuges: 3 Model E analytical units and 5 Model L preparative units routinely subject research samples of blood protein materials to 260,000 and 144,000 times gravity.
Ultracentrifugation is one of the newer and more rapidly expanding techniques for exploration into the characteristics of matter. Throughout the world hundreds of Spinco Ultracentrifuges are being used in laboratories for the isolation, purification, and characterization of proteins, viruses, enzymes, hormones, and other particulate materials. Besides biological applications, these procedures serve the pharmaceutical, chemical, petroleum, food, plastic, agricultural, atomic energy, metallurgical, and materials testing fields. Applications of ultracentrifugal forces may hold the answer to some oi your unsolved problems, too. The utility of ultracentrifugal investigations has recently been extended by newly-developed analytical methods to obtain measurements on materials from molecular weights in the millions to those of a few hundred. You are cordially invited to submit your problems to our research department for study and recommendations.
SPECIALIZED INSTRUMENTS CORPORATION 6 0 7 O'NEILL AVE
·
BELMONT,
CALIFORNIA
For further information, circle number 20 A on Readers' Service Card, page 39 A
20 A
ANALYTICAL
CHEMISTRY
