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Full-Text Articles in Physical Sciences and Mathematics
A Search For Ddt Residues In The Juneau Icefield, Alaska, Jon Edwin Barber, Russell S. Adams Jr.
A Search For Ddt Residues In The Juneau Icefield, Alaska, Jon Edwin Barber, Russell S. Adams Jr.
Journal of the Minnesota Academy of Science
The objectives of this study were: 1) to determine if DDT residues occurred in the ice of the Juneau Icefield, and 2) to devise a simple, inexpensive method of sampling glacial ice for pesticide residues. No DDT was found in the samples of ice collected strata spanning the 1963 to 1970 period. However, phthalate plasticizers were found in all samples and were assumed to be· due to contamination during collection. The elution time of the phthalate by gas chromatography was identical to that of p, p-DDT. Conversion of DDT to DDD by ultraviolet light was found to remove the phthalate. …
Buried Bedrock Topography Of The Cannon River System Around Northfield, Minnesota, Timothy D. Vick, Clinton A. Cowan, Daniel J. Packer
Buried Bedrock Topography Of The Cannon River System Around Northfield, Minnesota, Timothy D. Vick, Clinton A. Cowan, Daniel J. Packer
Journal of the Minnesota Academy of Science
A geophysical survey in the area of Northfield, Minnesota, involving electrical earth resistivity profiling and seismic refraction soundings, showed sizeable buried river channels in the bedrock in the Cannon River Valley which greatly increase in size downstream of Northfield. The channels upstream from the Northfield appear to be continuous and connect with the large buried channel between Northfield and Cannon Falls. The major buried valley deviates from the modern course of the Cannon River within the City of Northfield, but appears to follow elsewhere.