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 80 for “"Zinc (Zn)"”.
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Evaluation of corrosion behaviour of hot dip Zn and Zn-Al alloy coatings on steel wire using laboratory and field tests
… barrier and cathodic corrosion protection. Zinc (Zn) and zinc-aluminium (Zn-Al) alloys are the most commonly used metallic coatings on steel wire. Zn-Al coatings outperform Zn coatings, most notably in marine environments, as they combine the highly insulating oxide film associated with Al …
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Approaches to study Zn(II) deficiency and transport in biology
Divalent zinc, Zn(II), is an abundant and essential metal ion for human health. Across diverse biological settings, it stabilizes the structure of proteins, serves as a catalytic cofactor in enzymes with disparate functions, and mediates important signaling events. The ability of cells to apply …
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Heavy metal removal from bilge water by electrocoagulation treatment
… efficiency for copper (Cu), nickel (Ni), and zinc (Zn) using Electrocoagulation (EC) technique in a continuous flow reactor with a synthetic bilge water emulsion; and additionally, to discuss the operation cost of the treatment. The optimal configuration for EC treatment used combined …
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Understanding the Influence of Zinc on Grain Cadmium Accumulation and Bioaccessibility in Rice
<p><strong>The effect of cadmium and zinc on mineral concentrations in three cultivars of rice</strong></p> <p>Interactions between the essential mineral zinc (Zn) and the toxic heavy metal cadmium (Cd) play an important role in regulating transport of both minerals to rice grains. Understanding …
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The Effects of Selenium on Estrogen-regulated Gene Expression in LNCaP Prostate Cancer Cells
… The estrogen receptor (ER) contains cysteines in zinc (Zn) fingers that are susceptible to oxidation and internal disulfide formation, which can prevent DNA binding. We examined ER binding to its DNA response element and gene expression levels for estrogen-regulated genes in human prostate cancer …
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Heavy Metal Concentrations in Stream Sediments Adjacent to the Greenfield Sanitary Landfill, Dade County, Missouri
… (Cr), copper (Cu), nickel (Ni), lead (Pb), and zinc (Zn) using Inductively Coupled Plasma-Atomic Emission Spectrophotometry (ICP-AES) and a single nitric acid extraction. A t-test was used to compare each of the statistical mean metal concentrations in the control, samples collected upstream …
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The marine biogeochemistry of zinc isotopes
Zinc (Zn) stable isotopes can record information about important oceanographic processes. This thesis presents data on Zn isotopes in anthropogenic materials, hydrothermal fluids and minerals, cultured marine phytoplankton, natural plankton, and seawater. By measuring Zn isotopes in a diverse array …
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Population and community changes of attached-algae to zinc stress alone and in combination with selected environmental variables
… of attached algae to identify treatments of zinc (Zn) alone and in combination with treatments of phosphate, snail grazing, and pH. In the experiment presented in chapter 2, three treatments of zinc (0.05, 0.5, 1.0 mg Zn•l⁻¹) and a control could be identified by different algal communities in …
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Development of Endoplasmic Reticulum Targeted Probes and Red Fluorescent Probes for Detecting Zinc
<p>Zinc (Zn<sup>2+</sup>) is the second most abundant transition metal in the body and is important in various biological functions. Fluorescent sensors based on circularly permuted fluorescent proteins (cpFPs) have been previously made to detect labile, or unbound, Zn<sup>2+</sup> within the …
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Zinc Sunscreens Affect Development of Strongylocentrotus purpuratus Embryos
… to an increased release of the ingredients from zinc oxide (ZnO) sunscreens into marine environments. Though zinc (Zn) is a necessary micronutrient in the ocean, greater than natural Zn concentrations are being released into marine environments by use of sunscreens. The extent of the consequences …
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Interactions of cadmium, zinc, and phosphorus in marine Synechococcus : field uptake, physiological and proteomic studies
… investigating the interactions of cadmium (Cd), zinc (Zn), and phosphorus (P) in marine Synechococcus. Enriched stable isotope field uptake studies of 110Cd in the Costa Rica Upwelling dome, a Synechococcus feature, showed that uptake of Cd occurs in waters shallower than 40 m, correlates …
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Zinc alloy powders for alkaline batteries
<p>"Zinc (Zn) powders form the anode of a modern alkaline battery. During discharge of the battery, zinc oxidizes to produce zinc oxide and electrons. Alkaline batteries are prone to leakage during storage. This phenomenon is caused by zinc dissolving into the alkaline solution and producing …
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Investigating the Transformations of Arsenic and Toxic Metal(Loid)S Speciation and the Impact on Arsenic Bioaccessibility in Particulate Matter from Mine Tailings Sites Distributed in Different Climates
… and bioaccessibility of arsenic (As), lead (Pb), zinc (Zn), and cadmium (Cd) in sulfidic mine tailings collected from 11 abandoned sites across a broad climatic gradient in the Western United States, ranging from arid to humid environments. Tailings were sampled from surface to 2 m depth and …
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Interactions of cadmium, zinc, and phosphorus in marine Synechococcus : field uptake, physiological and proteomic studies
… investigating the interactions of cadmium (Cd), zinc (Zn), and phosphorus (P) in marine Synechococcus. Enriched stable isotope field uptake studies of ¹¹⁰CD in the Costa Rica Upwelling dome, a Synechococcus feature, showed that uptake of Cd occurs in waters shallower than 40 m, correlates …
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Exposure to Heavy Metals in American Robins: Impacts and Implications
… from robins were analyzed for copper (Cu), zinc (Zn), arsenic (As), mercury (Hg), and lead (Pb) and evaluated for changes in concentration across robins of different sexes, ages, and locations, as well as inter-elemental relationships. No significant changes in bone lead levels were …
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Developing Red Fluorescent Zn2+ Sensors and Characterizing Zn2+ Homeostasis in Mucolipidosis Type IV Disease
<p>Zinc (Zn<sup>2+</sup>) is a divalent, redox-inert metal that plays a vital role in many cellular processes either by acting as a catalytic cofactor or a labile signaling molecule in the cytoplasm. Cytosolic Zn<sup>2+</sup> levels are tightly regulated to stay within a narrow window of …
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Analysis of nature-based treatment of surface water runoff from an informal settlement to irrigate vegetables
… herein referred to as Exchange Capacity (CEC), Zinc (Zn+), and Iron (Fe+). In addition, the concentration of macro-and micronutrients (N, P, Ca, Mg, Na, Mn, Fe, and Zn) levels of the resulting produce were collected of each successive harvest and analysed at the end of the experiment. Compared …
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Metal sequestration of the host-defense protein human calprotectin
… metals such as manganese (Mn), iron (Fe), and zinc (Zn) to colonize the mammalian host and to cause disease. As part of the first line of defense against pathogenic infection, the host innate immune response deploys a number of metal-chelating host-defense factors that restrict the access of …
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The marine biogeochemistry of zinc isotopes
Zinc (Zn) stable isotopes can record information about important oceanographic processes. This thesis presents data on Zn isotopes in anthropogenic materials, hydrothermal fluids and minerals, cultured marine phytoplankton, natural plankton, and seawater. By measuring Zn isotopes in a diverse array …
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The role of Zinc and Reactive Oxygen Species in the Regulation of Endothelial Nitric Oxide Synthase
… with increased cellular levels of labile zinc (Zn). In addition, our analysis of the eNOS promoter indicated the presence of a putative heavy metal response element (HRE) in the 5'-flanking sequence. We hypothesized that nitric oxide (NO) may be regulating eNOS expression and activity …
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