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Your search keyword '"Geahigan, Karen B."' showing total 3 results
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3 results on '"Geahigan, Karen B."'

1. The dynamic impact of CpG methylation in DNA

Author

Geahigan, Karen B., Meints, Gary A., Hatcher, Mary E., Orban, John, and Drobny, Gary P.

Subjects
Biochemistry -- Research, DNA -- Research, Methylation -- Research, Magnetic resonance imaging -- Analysis, Deuterium -- Research, Biological sciences, Chemistry
Abstract

Research has been conducted on the perturbations of the EcoRI restriction binding site internal dynamics. The use of solid-state deuterium magnetic resonance imaging in investigating these perturbations is described.

Published
2000

3. Electron Transfer from a Cyclic Diaryliodine Species to Arenediazonium Salts. Evidence for the Intermediacy of 9-I-2 Structures in Iodine Atom Transfer Reactions(1).

Author

Geahigan KB, Taintor RJ, George BM, Meagher DA, and Nalli TW

Abstract

2,2'-Diiodobiphenyl (1) reacts with arenediazonium hexafluorophosphates (ArN(2)(+)PF(6)(-)) in acetonitrile to form biphenyleneiodonium salt (4) and iodoarenes (ArI) as major products. The reaction follows a free-radical-chain mechanism and involves a cyclic diaryliodine, 9-I-2 species (3), which is trapped as the iodonium salt (4) by a single-electron transfer (SET) to the diazonium salt. The results show that diaryliodine intermediates formed by the addition of phenyl radicals to iodoarenes can have sufficient lifetimes to allow trapping by bimolecular processes.

Published
1998
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