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Articles 1 - 6 of 6
Full-Text Articles in Physical Sciences and Mathematics
Evaluation Of Functionalized Magnetite Nanoparticles For The Removal Of Heavy Metal Ions From Aqueous Media, Khaula A. Ai Jahoushi
Evaluation Of Functionalized Magnetite Nanoparticles For The Removal Of Heavy Metal Ions From Aqueous Media, Khaula A. Ai Jahoushi
Theses
Sorption is one of the most efficient techniques for the removal of heavy metal ions from waste water. It involves the use of solid materials, known as sorbents, which can be natural of synthetic in origin. Recently, synthetic nanomaterials of various compositions have been used as sorbents. Among these materials, calcium phosphate; also known as hydroxyapatite (HAp), and magnetite were previously investigated as potential sorbents. In the current study, commercial HAp, and magnetite nanoparticles as well as their physical and chemical mixtures were investigated as potential sorbents for the removal of Cd2+ ions from simulated wastewater. A comparison is made …
Comparative Degradation Of Emerging Pollutants Using Chemical And Enzymatic Approaches, Khadega Abobaker Abudullarhman Al-Maqdi
Comparative Degradation Of Emerging Pollutants Using Chemical And Enzymatic Approaches, Khadega Abobaker Abudullarhman Al-Maqdi
Theses
Organic pollutants, especially those found in water bodies; pose a direct threat to various aquatic organisms as well as humans. A variety of different remediation approaches, including chemical and biological methods have been developed for the degradation of these organic pollutants. However, comparative mechanistic studies of pollutant degradation by these different systems are almost non-existent. In this study, the degradation of two emerging pollutants an antibiotic pollutant, Sulfamethoxazole (SMX) and a model thiazole pollutant, Thioflavin T (ThT), was carried out using advanced oxidation process (AOP), using UV+H2O2 or a peroxidase enzyme system. Optimization conditions for Sulfamethoxazole degradation by peroxidase enzyme …
2-D Electrophoresis Modeling Of Multienzyme Cutting Of Polypeptides, Howard Mayes
2-D Electrophoresis Modeling Of Multienzyme Cutting Of Polypeptides, Howard Mayes
Theses
2-Dimensional Electrophoresis is one of the tools in the identification of proteins by molecular weight and pH. The display of molecular weight allows the researcher to quickly identify whether a specific protein or peptide string is in the sample. The pH measurement allows even better resolution between different species in the sample. The MultiEnzyme ElectroPhoresis (MEEP) program tries to model that by providing a graph that displays separated protein strings by both molecular weight and pH. The ability to cleave the protein with 43 different enzyme variations allows the researcher to analyze appropriate enzymes to isolate a protein subsequence before …
Rational Drug Design Directed At Blocking The Initial Signaling Events In Lipopolysaccharide-Induced Sepsis., Christopher A. Tipton
Rational Drug Design Directed At Blocking The Initial Signaling Events In Lipopolysaccharide-Induced Sepsis., Christopher A. Tipton
Theses
Systemic Inflammatory Response Syndrome (SIRS) is classified as an immune system response to an infectious state. If left untreated, SIRS leads to sepsis, septic shock, end-organ dysfunction, and death. As a patient progresses through these stages, associations of acute respiratory distress, disseminated intravascular coagulation, and acute renal failure persist, resulting in millions of deaths annually. Lipopolysaccharide (LPS), a bacterial endotoxin, is released into the blood stream, triggering SIRS. LPS is found in the outer cell-wall of Gram-negative bacteria and is responsible for initiation of a devastating cytokine storm. One of the regions of LPS, lipid A, is a polyacylated glucosamine …
Gallium-Doped Microporous Γ-Al2o3: The Effect Of Preparative Conditions And Composition On The Textural Properties And The Catalytic Activity In Methanol Conversion To Dimethyl Ether As A Clean Fuel Alternative, Rawad Maarouf Bou Jaber
Gallium-Doped Microporous Γ-Al2o3: The Effect Of Preparative Conditions And Composition On The Textural Properties And The Catalytic Activity In Methanol Conversion To Dimethyl Ether As A Clean Fuel Alternative, Rawad Maarouf Bou Jaber
Theses
Solid acid catalysts, such as γ-alumina, are important materials in different catalytic applications such as dehydration reactions of alcohols. Methanol is one of the most important intermediates that can be obtained from natural gas and can be further converted to other efficient fuels and chemicals. Dimethyl ether, which can be obtained from methanol, is being considered as a promising future fuel besides being the building block for several industrially important chemicals. Although γ-alumina has shown significant activity for the dehydration of methanol to dimethyl ether, improving the conversion and the selectivity at relatively low temperatures is still a major concern. …
Microbial Degradation Of Various Organic Pollutants Using Bacteria Isolated From Petroleum Sludge, Manal Ali Hassan Saeed Alhefeiti
Microbial Degradation Of Various Organic Pollutants Using Bacteria Isolated From Petroleum Sludge, Manal Ali Hassan Saeed Alhefeiti
Theses
Intensification of agriculture and manufacturing industries has resulted in increased release of a wide range of xenobiotic compounds to the environment. The extensive discharge of hazardous waste in industrial wastewater and the recalcitrant nature of some of these organic pollutants have fueled a strong interest in exploring efficient and environmentally friendly approaches for wastewater remediation. Bioremediation approaches can provide efficient, inexpensive and environmentally safe cleanup tools. In the present study, our main objective was to isolate novel bacterial strains from UAE petroleum sludge and to examine their abilities to degrade various aromatic pollutants, including azo dyes and emerging pollutants. We …