ISSN:
0006-3525
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The microwave absorption of aqueous solutions of DNA extracted from E. coli has been studied between 8 and 12 GHz by the use of an optical heterodyne technique. By measuring optically the temperature rise produced in an absorbing sample by pulsed microwave radiation, unambiguous, direct measurement of the microwave absorption is possible. Our results show that E. coli DNA absorbs microwaves in the 8-12-GHz region substantially more efficiently than water, which is itself an extremely efficient absorber. The observed absorption is featureless and decreases slightly with increasing frequency. These observations are consistent with an explanation involving direct absorption by longitudinal acoustic modes of the double helix.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/bip.360211209
