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 18 of 18 for “"pH effect"”.
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Copper Electrodeposition on Iridium, Ruthenium and Its Conductive Oxide Substrate
The aim of this thesis was to investigate the physical and electrochemical properties of sub monolayer and monolayer of copper deposition on the polycrystalline iridium, ruthenium and its conductive oxide. The electrochemical methods cyclic voltammetry (CV) and chronocoulometry were used to study …
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Effects of Sulfide and pH on Microbial Sulfate Reducing Efficiency
… these systems are sustainable, cost effective, and have relatively low labor requirements. This study examined the effects of sulfide toxicity and pH on the activity of SRB, in order to improve the efficiency of sulfate reducing bioreactors. It was found that compared to sulfide, pH …
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The effects of elevated CO2 and ocean acidification on the production of marine biogenic trace gases
The human-induced increases in atmospheric carbon dioxide since the beginning of the industrial revolution have led to increasing oceanic carbon uptake and changes in seawater carbonate chemistry, resulting in lowering of surface water pH. To date, surface ocean acidity has increased by 30% …
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Effect of Ca and pH on Disease Severity of Pink Rot Phytophthora erythroseptica in Russett Norkotah Potato Solanum tuberosum
Phytophthora erythroseptica Pethyb. is a devastating fungal pathogen of potato (Solanum tuberosum). The pathogen causes a disease known as pink rot. Pink rot results in necrosis and decay of tubers; and is responsible for major losses pre and post harvest. Attributes of the disease are progressing …
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“Acid-spike” effect in spurs/tracks of the low/high linear energy transfer radiolysis of water : potential implications for radiobiology and nuclear industry
… track H3O+ concentrations and the corresponding pH values are obtained from our calculated yields of H3O+ as a function of time, using Monte Carlo track chemistry simulations. We selected four impacting ions and we used two different spur and track models: 1) an isolated “spherical” spur model …
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Photovoltaic properties and size-pH phase stability of iron disulfide from density-functional theory
… the biggest challenge preventing its use in photovoltaic devices. Two widely-accepted causes are: (i) Fermi level pinning caused by intrinsic surface states that appear as gap states; (ii) presence of the polymorph marcasite. Based on density-functional theory (DFT) calculations, (i) the …
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Raman and Surface-Enhanced Raman Spectroscopy Imaging of Droplets: Characterization and Environmental Implications
… both earth climate and air quality through physical and chemical processes. Droplets released from the human respiratory system, either suspended in air or deposited on surfaces, can carry pathogens (e.g., influenza viruses, the SARS-CoV-2 virus), and are thus important for disease …
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Water Vapor Sorption by Soy Proteins, Proteinates and Hydrolysates
… isolates prepared by precipitation at different pH and subsequently neutralized showed significantly different amounts of water sorbed. Increased ash content was thought to be responsible for the increased water sorption. Isoelectric isolate was dispersed in water and adjusted to pH levels …
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Roles of Nano- and Micro-Scale Subsurface Geochemical Reactions on Environmentally Sustainable Geologic CO2 Sequestration
… CO<sub>2</sub> emissions into the atmosphere. At GCS sites, injected CO<sub>2</sub> is kept in formation rock by an overlying low permeability caprock. During and after CO<sub>2</sub> injection, geochemical reactions can affect the porosity, permeability, and pollutant transport in …
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Degradation Of Selected Organic Agrochemicals In Artificial Soil Slurry Systems By Anodic Fenton Treatment
… the degradation process in the slurry system. Effects of different model soil components, such as humic acid, kaolin or montmorillonite clay, and goethite, on the degradation of different groups of agrochemicals, including carbaryl, mecoprop, paraquat, 4.6-odinitrocresol, p-nitrophenol and …
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Chemical and physical methods of enhancing the percutaneous absorption of antimicrobial agents
… (enhancers and supersaturated systems) or physical (iontophoresis) techniques. The hydrochloride salt of chlorhexidine (CHX), a poorly soluble salt, was used throughout this study. The effect of ionisation on in vitro permeation rate across the excised human epidennis was investigated using …
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The percutaneous absorption of ionisable compounds
The effects of ionisation on transdermal drug delivery using excised human epidermis (HS) and silastic rubber (SR) as model permeation barriers were investigated in vitro using Franz-type absorption cells. Suspensions and solutions of salicylic acid (SA), the model ionogenic permeant, were used as …
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The purification of industrial wastewater to remove heavy metals and investigation into the use of zeolite as a remediation tool
… kinetic studies and regeneration studies. The physical and chemical characterization of the zeolites was carried out using different analytical techniques such as Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), X – Ray Diffraction (XRD), X – Ray Fluorescence (XRF), …
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Penambahan gula dan pH substrat pada nata de Ipomoea skin dengan substrat kulit ubi ungu (Ipomoea batatas).
… untuk mengetahui pengaruh penambahan gula dan pH terhadap ketebalan, serat dan kadar antosianin nata de Ipomoea Skin. Penelitian ini bersifat eksperimental laboratorik dengan menggunakan Rancangan Acak Kelompok (RAK) yang terdiri dari 2 Faktor dengan 12 perlakuan dan 3 kali ulangan. Faktor …
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Carbon Limitation in Periphytic Algal Wastewater Treatment Systems
<p>As global eutrophication poses an ever increasing threat to water quality new techniques must be implemented to improve the sustainability of natural resource consumption. Wastewater treatment facilities (WWTF) are designed to destroy pathogens, remove particulates, lower oxygen demanding …
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Investigation of the Vesicular Stomatitis Virus Matrix Protein: Uncoating and Assembly
… and is involved in uncoating, cytopathic effects (CPE), and assembly of the virus. M protein interactions involved in the uncoating and assembly of VSV have been examined in this dissertation. <br /><br />Uncoating of VSV involves dissociation of M from the ribonucleoprotein core (RNPs) of …
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Climate proxies in planktic foraminifera: Environmental or biomineralisation controls?
… by varying dissolved inorganic carbon (DIC), pH, and carbonate ion concentration ([CO32-]) independently. This approach makes it possible to statistically determine how foraminiferal proxies respond to different components of the seawater carbon system, which are otherwise strongly correlated …
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Dynamic and equilibrium adsorption behaviour of ß-lactoglobulin at the solution/tetradecane interface: Effect of solution concentration, pH and ionic strength
Proteins are amphiphilic and adsorb at liquid interfaces. Therefore, they can be efficient stabilizers of foams and emulsions. β-lactoglobulin (BLG) is one of the most widely studied proteins due to its major industrial applications, in particular in food technology. In the present work, the …