No abstract

No abstract

W ( T~-C~M~~-~-B U ) C~~]~, 83511-04-0; ZnMe2, 544-97-8; ZII(CH~CM~~)~, 54173-23-8.(16) The theoretical distribution is (1a4W)3 = 63.6%, (1MW)2(183W) = 31.0%, (184W)(183W)2 = 5.170, and (1s3W)3 = 0.3%. Half of the triplet pattern for (''W)(183w)2 is found under the main peak due to the hydride in (17) Bau, R.; Carroll, W. E.; Teller, R. G.; Koetzle, T. F. Summary: Low-temperature photolysis of 2,3-benzo- 7,7,8,8-tetra-tert-butyl-7,8disilabicyclo [2.2.2]octa-2,5diene provides, in addition to naphthalene, tetra-tert-butyldisilene, which exhibits UV absorption maxima at 305 ( E 5200) and 433 nm (2800). This disilene is thermally unstable and has a half-life of only several hours at room temerature (ca.

A concentric-cylinder airlift reactor, in which the annulus is a packed bed of glass fibers, has been developed in order to facilitate the scaleup and enhance the volumetric productivity of anchorage-dependent animal cell cultures. In this bio-reactor, oxygen-containing gas is sparged through the inner draft tube, causing bubble-free medium to flow through the fiber bed in the outer cylinder and providing both oxygenation and convective nutrient transfer to the cells. Several other desirable features for reactor operation are also provided by this design. Cell cultivations in this bioreactor have been successfully carried out and provide data for the feasibility of the large-scale cell cultivation.

No abstract