Helen Franklin

Learn More
The effects of periodicity perturbations in underwater phononic crystal layers composed of noninterpenetrating rows of identical shells are investigated. The results for one row are obtained by using a multiple scattering method between shells. Then, taking into account the multiple reflections and transmissions between two adjacent rows, a Debye series(More)
Gas measurements made in the stratospheric plume from the eruption of Mount St. Helens on 18 May 1980 were not consistent with a reported large injection of radon-222 into the atmosphere. No enrichment in the volatile element polonium was found in filter samples, and the ratio of polonium-210 to lead-210 was not different from background values. Data(More)
Foodborne illness presents a public health challenge in USA. There is an urgent need for the federal government and food industries to expand efforts to prevent any food contamination that potentially could be harmful to human health. The Food Safety Laboratory (FSL), ARS, USDA, is one of the leading laboratories for the development of optoelec-tronic(More)
Recently, it has come to our attention that in the left panel of Fig. 2b of this Letter, the lanes labelled S 2 S 4 and S 6 S 17 were duplicated. We have reviewed the original data. It seems likely that a duplicated part of the blot was placed over lane S 6 S 17 to aid alignment of molecular mass markers and inadvertently left there. We have now removed the(More)
  • 1