Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 229 for “"trace metals"”.
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The marine geochemistry of trace metals
… to provide a basis for oceanographic models for trace metals. Copper, nickel, and cadmium can be determined in a 100 ml seawater sample using cobalt pyrrolidine dithioacarbamate chelate coprecipitation and graphite atomizer atomic absorption spectrometry. Concentration ranges likely to be …
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Chemiluminescent Multicomponent Determination of Trace Metals
Made available in DSpace on 2014-12-13T20:10:45Z (GMT). No. of bitstreams: 1 8004283.pdf: 5992892 bytes, checksum: 7a90f117834a0521101a12195f5dd8fb (MD5) Previous issue date: 1979
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The marine geochemistry of trace metals.
Thesis. 1976. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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The biogeochemistry of marine particulate trace metals
… both the distributions of marine particulate trace metals and the underlying processes—inputs, scavenging, vertical and horizontal transport, and biotic uptake—in which marine particles participate. I first present the results of an intercalibration exercise among several US laboratories. We …
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Transport of trace metals in nearshore sediments
… focus of this thesis is on rates of transport of metals both across the sediment/water interface and within the sediment column of nearshore sediments. The early diagenesis of several first-row transition metals exhibiting a variety of behaviors in the ocean -- Mn, Fe, Co, Ni, and Cu -- has been …
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Interactions of Trace Metals With Biological Compounds
Made available in DSpace on 2014-12-13T20:10:20Z (GMT). No. of bitstreams: 1 7804180.pdf: 6506678 bytes, checksum: 783c8af097d862818d50199bde3bd564 (MD5) Previous issue date: 1977
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The biogeochemistry of marine particulate trace metals
… both the distributions of marine particulate trace metals and the underlying processes-inputs, scavenging, vertical and horizontal transport, and biotic uptake-in which marine particles participate. I first present the results of an intercalibration exercise among several US laboratories that …
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Transport of trace metals in nearshore sediments
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1985.
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THE DETERMINATION OF TRACE METALS BY CAPILLARY ELECTROPHORESIS
… post-capillary reactor for the determination of trace metals by UV-Vis absorption after formation of intensely absorbing coloured complexes. The main principle of operation was based on the infusion of the colorimetric reagent into a small 50µm gap between the separation capillary and the …
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The determination of trace metals in mixed matrices
… flotation techniques for pre-concentration of trace metal ions discussed. Direct-slurry, direct current plasma (DCP) spectrometry, has been studied for possible determination of Cu, Cr and Ag chemical impregnants on activated, granular, carbons used in chemical defence protection systems. …
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Trace metals and the ecology of marine cyanobacteria
… of these cyanobacteria can be influenced by trace metals such as iron and copper. Iron is an essential trace metal that is present in the high nutrient, low chlorophyll waters of the equatorial Pacific in extremely low concentrations. When these waters were enriched with iron, Prochlorococcus …
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Phytochelatin induction by trace metals in marine microalgae
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1994.
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IN SITU MEASUREMENT OF TRACE METALS IN COASTAL WATERS
… situ and laboratory techniques for monitoring of trace metals and master variables in the environment. Chapter 1 presents a general overview of trace metals, their sources, sinks and roles in estuaries and near coastal zones, their general characteristics and the importance of their behaviour in …
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Techniques for monitoring human exposure to airborne trace metals
… for monitoring human exposure to airborne trace elements in urban atmospheres using trace metal analysis of human hair.
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Determination of dissolved trace metals in the western North Pacific
… resin for preconcentration/separation of these metals from seawater matrix, followed by ICP-MS or GFAAS detection. This method was used to investigate trace metals in the western North Pacific, a region for which little trace metal data are available. Concentrations of these elements are found …
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DETERMINATION OF TRACE METALS BY lON-CHROMATOGRAPHY WITH CHEMILUMINESCENCE DETECTION
… that the detection step for the determination of trace metals by liquid-chromatographic systems is the weakest area of the analytical procedure. Various post-column reagent systems, for trace metal analysis, based on the highly sensitive luminol-peroxide chemiluminescence (CL) reaction have been …
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