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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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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.
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Showing 31 to 40 of 668 (0.046 seconds)Spelling suggestions: "subject:"[een] TRACE ELEMENTS"" "subject:"[enn] TRACE ELEMENTS""
| 31 |
Sol-gel encapsulation of heterocyclic ligands for aqueous sensing applicationsJohnson, Andrea January 1996 (has links)
No description available.
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| 32 |
Stable carbon and nitrogen isotopes in insects : the influence of dietWebb, Sarah Christine January 1997 (has links)
No description available.
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| 33 |
SEDIMENTS FROM AROUND THE LOWER YOUNGER DRYAS BOUNDARY (SE ARIZONA, USA): IMPLICATIONS FROM LA-ICP-MS MULTI-ELEMENT ANALYSISANDRONIKOV, ALEXANDRE V., ANDRONIKOVA, IRINA E. 09 1900 (has links)
One of the prominent features in sediment sequences formed around the AllerOd-Younger Dryas transition (c. 12.9-12.8 ka bp) in North America is a dark layer of organic-rich material, i.e. the black mat. The black mat sequences in southeast Arizona contain a thin sandy basal layer corresponding to the lower Younger Dryas boundary. Trace element concentrations in the lower Younger Dryas boundary sediments, in the black mat, in the host sediments, and in charcoal from Western Europe and southeast Arizona were studied using LA-ICP-MS. The black mat samples and samples of the underlying host sediments display compositions similar to the average continental crust, while the sediments from the lower Younger Dryas boundary are enriched in rare earth elements, Ni, and Co whereas Ta, Nb, Zr, and Hf are depleted relative to the rare earth elements. Such a difference in compositions between the lower Younger Dryas boundary sediments and other sediments points to a short enigmatic event, which changed conditions of sedimentation just before the onset of the Younger Dryas cooling. The presence of products of biomass burning of still unknown origin is suggested on the basis of trace element features of sediments from the lower Younger Dryas boundary.
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| 34 |
Novel approaches to the determination of trace elements by atomic spectrometryTan, Yanxi. January 1996 (has links)
No description available.
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| 35 |
Trace element distribution in igneous minerals and liquidsForsythe, Lance M. 28 March 1994 (has links)
Graduation date: 1995
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| 36 |
Electrophoretic methodologies for the determinations of minerals and trace elements in milk /Sze, Kwan-Lok. January 2009 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2009. / Includes bibliographical references. Also available online.
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| 37 |
Electrophoretic methodologies for the determinations of minerals and trace elements in milkSze, Kwan-Lok. January 2009 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2009. / Includes bibliographical references. Also available in print.
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| 38 |
Development of novel bonded-phase ion exchange systems for the preconcentration and recovery of trace metals from aqueous systems /Miller, Thomasin Clare, January 2001 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2001. / Vita. Includes bibliographical references. Available also in a digital version from Dissertation Abstracts.
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| 39 |
An ecotoxicological study of trace metals in the green-lipped mussel Perna viridis (L.) (Bivalvia : Mytilacea) /Chan, Hing-man. January 1987 (has links)
Thesis (M. Phil.)--University of Hong Kong, 1988.
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| 40 |
Trace metals analysis by electroanalytical methods /Wong, Kwong-hon. January 1979 (has links)
Thesis (M. Phil.)--University of Hong Kong, 1979.
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