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 21 for “"Toxic Heavy Metals"”.
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Fluorescence Detectors for Proteins and Toxic Heavy Metals
<p>An inexpensive detector for proteins is described. The detection technique was based on two-photon excitation intrinsic protein fluorescence using a visible 532 nm diode-pumped nano laser as the excitation source. Proteins that exhibit intrinsic fluorescence must contain at least one tryptophan, …
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Determination of Toxic Heavy Metals in Wet Deposition and Ambient Air in Columbus, GA
… today. One such source of this pollution is heavy metals. The impact of heavy metal pollution on living organisms can be disastrous, having the potential to cause the deterioration of ecosystems and posing danger to the health and survival of the human race. Chronic and acute human exposure …
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Interactions of Inorganic Mercury and Inorganic Cadmium with Biomimetic and Complex Biological Membranes and their Influence on Membrane Packing and Size
… mercury (Hg2+) and Inorganic Cadmium (Cd2+) are toxic heavy metals linked to the development of cancer, diabetes and neurological dysfunctions. The effect of these metals on the fluidity and phase transition (Tm) of biomimetic and polar extract membranes was investigated using Laurdan Generalized …
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Characterizing and modeling the hydrologic properties of coal combustion by-products in landfills
… previous studies, CCBs have been found to leach toxic heavy metals such as arsenic, mercury, and lead into groundwater. CCBs include fly ash, bottom ash, and flue gas desulfurization product (FGD gypsum). This investigation focused on determination of the saturated and unsaturated hydraulic …
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Feasibility and assessment of using recycled rubber for infrastructure applications
… increases driving safety. Environmentally, the toxic heavy metals leached from the rubberized chip were below that of the EPA drinking water standards with a significant reduction of heavy metal leaching when rubber was used with emulsion in the form of chip seal. The third application was …
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BIOSENSING OF MATRIX METALLOPROTEINASE ACTIVITY WITH CD-FREE QUANTUM DOTS
… ideal for complex in vivo conditions. However, toxicity has been a chief concern in the eventual implementation of QDs for in vivo applications such as biosensing and tumor imaging. Commercially available QDs contain a notoriously noxious Cd component and therefore continuous research has gone …
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Cadmium, kidney and bone
Toxic heavy metals, such as cadmium, mercury and lead, occur in the environment both naturally and as contaminants due to agricultural and industrial activities. The aims of this thesis were to examine the levels of these metals in the kidney in the general population and the association with …
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Levels of Heavy metals in Soil, Water, and Plants and Variation of water Quality Parameters at Vikuge in Kibaha District, Tanzania
The levels of toxic heavy metals ( cadmium, lead, copper, zinc, chromium and iron) were checked in soil, water, plant leaves, fruits and roots obtained at Vikuge in Kibaha, Tanzania. The samples of water from the three wells were taken in triplicate, similar to the samples of plants, fruits and …
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Integration of Metal-Organic Frameworks with Electrospun Fibers for Heavy Metal Removal and Carbon Dioxide Capture
… widespread contamination of water sources with toxic heavy metals represent two of the most pressing environmental challenges of the 21st century. Efficient and scalable materials capable of capturing CO2 and removing pollutants such as Pb(II) and Cu(II) are urgently needed to mitigate climate …
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The Toxic Legacy of the Gold Rush
… make the process more efficient and bringing up toxic heavy metals like arsenic and lead in the process. These contaminants persist in the environment and are known to be harmful to human health. Today, there are 47,000 abandoned mines littered across California, many of which are gold mines …
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Nitrate and nitrite growth inhibition of Desulfovibrio strains
… have the ability to limit the movement of toxic heavy metals from one environmental site to another by keeping those metals from dissolving in water. Limiting the movement of heavy metals into drinking water supplies is especially desirable in former nuclear weapons complexes, which are …
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Assessment of groundwater quality in a part of Mhlathuze catchment of Empangeni and Richards Bay, KwaZulu-Natal, South Africa
… processes and the probable source of toxic metals in the groundwater. About 40 and 33 groundwater samples were collected in the year 2015 and 2016 respectively and they were analysed. The groundwater ranges from acidic to alkaline in nature. The parameters of drinking water quality …
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Species distribution, phylogenetic structure and functional roles of detritus inhabiting fungi across contrasting aquatic environments
… trophic levels, and are essential for removing toxic heavy metals and degrading xenobiotics. In light of global climate change, habitat loss, and water pollution, it has become increasingly important to examine this understudied group of fungi. Using both culture-dependent and …
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Continuous separation and recycle of homogeneous catalysts in small scale flow system
… in fine chemicals production, the presence of toxic heavy metals in these catalysts (Pd, Pt, Ru, Rh, etc.) can pose significant separation challenges. Regulatory bodies (such as the FDA and EMA) require that many popular catalytic heavy metals stay below 10 ppm in pharmaceutical drugs. Organic …
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Caracals as sentinels for metal exposure in a human-transformed landscape
… metalloids into the environment. Due to their toxicity, environmental persistence and bioaccumulative nature, these chemical pollutants threaten wildlife and human health. As urbanisation increases and top predators are forced to utilise more urban spaces, they will likely be exposed to more …
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Investigations on the development of a novel hybrid sensor for environmental monitoring applications.
Heavy metal toxicity is a major environmental problem world-wide. Increased spreading and high concentration levels of the toxic heavy metals in water environments have posed a severe threat to human health and the ecosystem. Over the years, to improve the drinking water quality standards, safe …
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IDENTIFICATION AND ANALYSIS OF PROTEINS AND GENES RESPONSIBLE FOR MICROBIAL ANAEROBIC NITRATE-DEPENDENT IRON OXIDATION AND OVEREXPRESSION IN E. coli OF PERCHLORATE REDUCTASE
… in the adsorption and precipitation of soluble toxic heavy metals and radionuclides from surrounding environment. Therefore, this metabolism has been attracting more and more attention because this process could serve as a cost-effective way to co-remediate nitrate, heavy metals and …
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Improving the anaerobic co-digestion of pelagic Sargassum and food waste into biogas and a bio-fertiliser using hydrothermal pre-treatment: Concept to application in the Caribbean
… of this effluent necessitates remediation of the toxic heavy metals arsenic and mercury to satisfy international soil standard guidelines for utilisation in agricultural practice. From the techno-economic assessment conducted, the implementation of an integrated Sargassum-based biorefinery …
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Ruminal Degradation of Polyhydroxyalkanoate and Poly(butylene succinate-co-adipate)
… of the reticulo-omasal orifice, and leaching of toxic heavy metals. It is necessary to reduce the incidences of plastic impaction in domestic ruminants. Using polyhydroxyalkanoate (PHA) and poly(butylene succinate-co-adipate) (PBSA) biodegradable materials for feed storage products such as bale …
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Turn-on fluorescent probes for detecting nitric oxide in biology
… over other biologically relevant metal cations, toxic heavy metals, and most first-row transition metals, and is of appropriate affinity (Kdl = 150 ± 100 [tM, Kd2 = 3.5 ± 0.1 mM) to bind Zn(II) at physiological levels reversibly. In live cells, QZ2E localizes to the Gogli apparatus where it can …
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