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 12 of 12 for “"hydrogen sulfide (H₂S)"”.
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Study of four new, field-based, microbiological tests : verification of the hydrogen sulfide (H₂S), Easygel®, Colilert and Petrifilm(tm) tests
… tests. These include the Presence/Absence (P/A) hydrogen sulfide (H2S) test, the enumerative Easygel®, test, the 10-mL P/A Colilert test and enumerative PetrifilmTM test. However, the accuracy of these tests has never verified or established. The objective of this thesis is fourfold: (1) to …
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Interplay of Iron and Hydrogen Sulfide in Pathophysiology of Vascular Damage
Hydrogen sulfide (H₂S) and iron are fundamental regulators of redox biology, exerting opposing influences on oxidative stress and vascular homeostasis, yet their mechanistic interplay remains unresolved. This dissertation addresses this gap through a series of studies spanning molecular, …
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Updated EOR screening criteria and modeling the impacts of water salinity changes on oil recovery
… in oil-wet reservoirs. On a separate note, hydrogen sulfide (H₂S) risk in anthropogenic CO₂ transportation is highlighted"--Abstract, page iii.</p>
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The evolution of hydrogen sulfide by Gluconobacter species
… Gluconobacter produce detectable quantities of hydrogen sulfide (H₂S) when incubated in SYP medium (5% sorbitol, 1% yeast extract, and 1% peptone) containing thiosulfate. This finding is puzzling, since the microbial evolution of H₂S is characteristic of anaerobic or facultative bacteria. The …
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Collection, analysis, and utilization of biogas generated by the anaerobic treatment of crab processing wastewater
… of methane (CH₄), carbon dioxide (CO₂), and hydrogen sulfide (H₂S). Biogas produced by System A (upflow anaerobic bed filter) produced biogas averaging 68, 28, and 1.5 % CH₄, CO₂, and HS, respectively. System A average gas production ranged from 6.3 to 15.8 liters per day (L/d) (6.6 to 10.0 L …
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Monitoring and evaluation of the ceramic hemispheric filter in Northern Ghanaian households
… respondent's filter. IDEXX Quanti-Tray/2000® and hydrogen sulfide (H₂S) bacteria MPN tests were conducted to measure the water quality parameters of total coliform/E. coli and H₂S bacteria respectively. Turbidity was also measured. Water quality tests served as an objective measure for HWTS …
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Synthesis of Small Molecule and Polymeric Systems for the Controlled Release of Sulfur Signaling Molecules
Hydrogen sulfide (H₂S) was recognized as a critical signaling molecule in mammals nearly two decades ago. Since this discovery biologists and chemists have worked in concert to demonstrate the physiological roles of H₂S as well as the therapeutic benefit of exogenous H₂S delivery. As the …
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Design and Synthesis of Supramolecular Structures for the Controlled Release of Sulfur Signaling Species
In the early 2000s, hydrogen sulfide (H₂S) was added to the family of molecules known as gasotransmitters, a class of endogenously produced and freely diffusing biological signaling molecules. Since this discovery, biologists and chemists have sought to understand the physiological roles of H₂S and …
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Enhanced methylglyoxal formation in cystathionine γ-lyase knockout mice
… causative factor for hypertension and diabetes. Hydrogen sulfide (H₂S), on the other hand, is a gasotransmitter with multifaceted physiological functions, including anti-oxidant and vasodilatory properties. The present study demonstrates that MG and H₂S can interact with and modulate each other's …
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Design of functional polymeric materials for cancer-targeted drug delivery and cellular capture and isolation
… Taking it a step further, in chapter 3, hydrogen sulfide (H₂S) prodrug (ADT) was chemically conjugated to the core of BCPMs bearing oxidation-sensitive thioether group and the anti-cancer effects of H₂S in colon cancer cells (HT29) were evaluated. A greater anti-proliferative effect was …
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Synthesis and mechanistic studies into the cytotoxic activity of garlic-related trisulfides in cancer cells
… and therapeutic potential. Among these, trisulfides are notable phytochemicals that exhibit a broad range of biological activities, including anticancer effects both in vitro and in vivo, as well as antimicrobial, antioxidant, and antithrombotic properties. Recent methodologies have enabled …
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Mechanisms governing the growth, reactivity and stability of iron sulfides
… surface. A corrosion system comprising an iron sulfide film (passive layer) formed on iron or steel in contact with an hydrogen sulfide (H₂S)- rich fluid can thus, in principle, be modeled by a series of unit reaction steps that control the rate of degradation under given thermodynamic …