Global ETD Search

31	Sol-gel encapsulation of heterocyclic ligands for aqueous sensing applications Johnson, Andrea January 1996 (has links) No description available. 541 Chemical sensors; Trace elements
32	Stable carbon and nitrogen isotopes in insects : the influence of diet Webb, Sarah Christine January 1997 (has links) No description available. 577 Nutritional ecology; Trace elements
33	SEDIMENTS FROM AROUND THE LOWER YOUNGER DRYAS BOUNDARY (SE ARIZONA, USA): IMPLICATIONS FROM LA-ICP-MS MULTI-ELEMENT ANALYSIS ANDRONIKOV, 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. Sediments Trace elements Younger Dryas
34	Novel approaches to the determination of trace elements by atomic spectrometry Tan, Yanxi. January 1996 (has links) No description available. Atomic spectrometry. Trace elements -- Analysis.
35	Trace element distribution in igneous minerals and liquids Forsythe, Lance M. 28 March 1994 (has links) Graduation date: 1995 Rocks, Igneous Magmas Trace elements
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.
37	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 in print.
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. Ion exchange. Trace elements. Metals
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. Perna. Mussels. Trace elements Metals
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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