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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
71

Decay of neutron deficient rubidium

Hamdy, Safinaz Calamawy. January 1975 (has links)
No description available.
72

Analysis of proton induced reaction in 3He and 4He.

Lim, Fang-Ning January 1970 (has links)
No description available.
73

Spectroscopic calculations for odd mass cesium isotopes

Sofia, Kamilia January 1976 (has links)
No description available.
74

Decay of neutron deficient Sb isotopes

Oxorn, Kenneth Warren January 1977 (has links)
No description available.
75

Iron-55 in Pacific Ocean organisms

Jennings, Charles David 31 January 1968 (has links)
Graduation date: 1968
76

Chromium-51 in the Columbia River and adjacent Pacific Ocean

Cutshall, N. H. 15 December 1966 (has links)
Radioactive chromium-51, a waste byproduct from operation of nuclear reactors at Hanford, Washington, has been followed down the Columbia River and into the Pacific Ocean. Chemical factors influencing the partitioning of ⁵¹Cr between solution and sediment have been considered. Chromium-5l, in a hexavalent oxyanion when introduced into the Columbia River, largely remains in solution in a hexavalent anion during its passage through the lower river and after its entrance into the Pacific Ocean. A minor fraction of Hanford-induced ⁵¹Cr becomes attached to suspended particles and bottom sediments. Reduction of Cr(VI) to Cr(III) apparently precedes or accompanies sorption. Iron oxides appear to be the most important sorption substrate. Sediment organic matter acts both as a reducing agent, making ⁵¹Cr less soluble, and as a sorption substrate. Ion exchange on sediment particles is not important in retention of ⁵¹Cr by Columbia River sediment. Chromium-51 is a sensitive and unique tracer for Columbia River water at sea and has been used to trace the Columbia River plume up to 525 km away from the mouth of the river. Dispersion of ⁵¹Cr by the Columbia River system would be adversely affected by: 1) lowered pH; 2) presence of particulate organic wastes; 3) increased temperature; 4) increased biological oxygen demand. These factors would increase the rate of uptake of ⁵¹Cr by sediments and thus increase the steady-state inventory of ⁵¹Cr on the bottom of the river. / Graduation date: 1967
77

Antimony-124 in the lower Columbia River

Pope, Stephen Van Wyck 28 July 1969 (has links)
Graduation date: 1970
78

Determination and application of ³²p specific activity in Columbia River fish

Romberg, Gerald Patrick 31 July 1969 (has links)
Graduation date: 1970
79

Feasibility study on the medical isotopes production with solution target using OSTR: ������Mo and related isotopes

Baik, Seung-Hyuk 04 March 1999 (has links)
Graduation date: 1999
80

Mass-independent Fractionation of Mercury Isotopes in Freshwater Systems

Rose, Carla 13 January 2011 (has links)
Mass-independent fractionation (MIF) of Hg isotopes has the potential to track the environmental transport and fate of Hg. Herein we demonstrate that reducing both the frequency and intensity of light have a large effect on the expression and magnitude of MIF. This strongly supports the magnetic isotope effect as the mechanism behind MIF observed during aqueous photo-reduction of Hg(II) and MeHg. The ratios of MIF, KapDelta199Hg/KapDelta201Hg, were 1.00 ± 0.04 (2SE) for Hg(II) and 1.35 ± 0.16 (2SE) for MeHg respectively and did not change as incident radiation energy and magnitude of MIF diminished, suggesting the respective MIF pathways remained constant regardless of experimental conditions. Comparable amounts of total photo-reduction were shown to coincide with different magnitudes of MIF depending the wavelength light available for photo-reduction. This confirms there are multiple pathways for photo-reduction in freshwater reservoirs and indicates that quantitatively relating photo-reduction and MIF will be challenging.

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