Complexes of benzo-15-crown-5 macrocycle with Li+ and Cs+ ions were investigated by 7Li and 133Cs NMr in a number of nonoqueous solutions. The resulting 1:1 complex with Li+ ion was found to be much more stable than that with Cs+ ion. With the exception of pyridine solutions the stabilities of the complexes varied inversely w...

We review recent studies that examine the temporal resolution of the avian auditory system as measured behaviorally in a small songbird, the Zebra Finch (Taeniopygia guttata). These birds naturally learn and produce complex harmonic vocalizations. Here we created complex harmonic stimuli that simulate the fine temporal properties of these natural calls in order to probe the possible parallels b...

The problem of rotation corrections for hard mounted gravity gradiometers is widely regarded as intractable. In large part this is due to the unavailability of sufficiently accurate star sensors, gyros, and angular accelerometers. It will be shown here that, for floated satellite gradiometers, subject to very low levels of unmodeled forces and torques, dynamic estimation can dramatically reduce...

9:30 10:30 Paul Seymour, “Disjoint paths in tournaments” 10:30 11:00 Coffee Break 11:00 11:20 Tony Huynh, “Explicit bounds for graph minors” 11:25 11:45 Isolde Adler, “Tight bounds for linkages in planar graphs” 11:50 12:10 Michal Pilipczuk, “Jungles, bundles and fixed parameter tractability” 12:10 3:30 Lunch and discussion 3:30 3:50 Pierre Charbit, “LexBFS, structure and algorithms” 3:55 4:15 ...

The Sn(IV) atom in the title compound, 2[Sn(CH(3))(2)(C(6)H(5))Cl(H(2)O)]·C(10)H(20)O(5), exists in a trans-C(3)SnClO trigonal bipyramidal geometry in which the organo substituents occupy the equatorial sites. The coordinated water mol-ecule forms two hydrogen bonds to the 15-crown-5 mol-ecule, which is disordered about a center of inversion.

The sensitivity of the human glucocorticoid receptor (hGR) gene to mutagenesis by the cancer chemotherapeutic drugs adriamycin, bleomycin, and chlorambucil was evaluated using glucocorticoid-sensitive (dex s) subciones of the human leukemic cell line CEM-C7. Treatment of cells with either bleomycin or chlorambucil increased the frequency of glucocorticoid-resistant (dex r) clones 3.3and 10-fold...