Unified Interior Regions

Region 4: Mississippi Basin

Regions L2 Landing Page Tabs

Filter Total Items: 4,281
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Year Published: 1966

Uptake of 2,4-dichlorophenoxyacetic acid by Pseudomonas fluorescens

Factors influencing the uptake of the sodium salt of 2,4-dichlorophenoxyacetic acid (2,4-D), under conditions in which no net metabolism occurred, were investigated in an effort to determine both the significance of “non-metabolic” uptake as a potential agent in reducing pesticide levels and the mechanisms involved. Uptake of 2,4-D was affected by...

Wedemeyer, Gary

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Year Published: 1965

The 1965 Mississippi River flood in Iowa

The great flood of 1965 on the Mississippi River, along the eastern border if the State, exceeded any flood known in 139 years. It cause damages probably in excess of ten millions of dollars in the State of Iowa. Studied now in progress will more thoroughly cover this and other phases of the flood. The underlying cause of the flood was an...

Schwob, Harlan H.; Myers, Richard E.
The 1965 Mississippi River flood in Iowa; 1965; OFR; 65-145; Schwob, Harian H.; Myers, Richard E.

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Year Published: 1965

Relative toxicities of similar formulations of pyrethrum and rotenone to fish and immature stoneflies

The insecticidal properties of rotenone and pyrethrum have been known for many years. Both toxicants have long histories of extensive use for control of a variety of insect pests. Rotenone has been also employed as a management tool by fishery biologists to rehabilitate fishing waters, and its toxicity to fish in a number of ecological situations...

Bridges, W.R.; Cope, O.B.

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Year Published: 1965

The water story in Central Iowa

"The general welfare of the people of the state of Iowa requires that the water resources of the state be put to beneficial use to the fullest extent of which they are capable."  This can be achieved only by a knowledge and understanding of the water resources - their use, their source, their quality, their availability, and the demands place...

Twenter, F.R.; Coble, R.W.

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Year Published: 1964

Water resources of the English River, Old Mans Creek, and Clear Creek basins in Iowa

The surface and ground water resources of a 991 square mile area comprising the drainage basins of English River, Old Mans Creek and Clear Creek are presented. These basins lie to the west and southwest of Iowa City, Iowa, and all three streams are tributary to the Iowa River. The area is comprised of rolling uplands with relatively broad valleys...

Schwob, H.H.
Water resources of the English River, Old Mans Creek, and Clear Creek basins in Iowa; 1964; OFR; 64-141; Schwob, H. H.

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Year Published: 1963

Insecticides: effects on cutthroat trout of repeated exposure to DDT

Cutthroat trout were periodically exposed to p, pp-DDT, in acetone solution or in the food. Excessive mortality occurred only in lots treated with high concentrations of DDT, probably as a result of decreased resistance to nonspecific stressors. Surviving fish in these lots were significantly larger than those in the control lot, or in the lots...

Allison, Don; Kallman, Burton J.; Cope, Oliver B.; Van Valin, Charles C.

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Year Published: 1963

Reductive dechlorination of DDT to DDD by yeast

Labeled DDD [ 1,1-dichlor-o-2,2-bis(p-chlorophenyl)-ethane] was formed from C14-labeled DDT in the presence of yeast. The formation of DDD from DDE [1,1-dichloro-2,2-bis (p-chlorophenyl)-ethylene] was not observed, indicating that a reductive dechlorination of DDT occurs.

Kallman, Burton J.; Andrews, Austin K.

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Year Published: 1963

Cedar River basin floods

No abstract available

Schwob, Harlan H.