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 47 for “"hydrogen sulfide (H2S)"”.
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Hydrogen Sulfide (H2S) and the Cardiovascular System
Hydrogen sulfide (H2S) has relatively recently been added to a list of endogenously produced gaseous signalling molecules. Our understanding of the science of H2S has advanced rapidly in recent years as exemplified by the fact that, within a mere 10 years, a range of H2S releasing drugs have …
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Waste to an Asset, H2S to Hydrogen: A DFT Study
Electrolysis of hydrogen sulfide (H2S) offers a green and zero-emission process for producing hydrogen and for treating the harmful H2S from oil and gas industries. However, the development of such technology requires an efficient and stable catalyst. Herein, we investigate the mechanism of …
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Cross-sectional epidemiological study on water and sanitation practices in the northern region of Ghana
… and analyzed for bacterial contamination with hydrogen sulfide (H2S) and membrane filtration testing techniques. This data is analyzed as an epidemiological cross-sectional study and basic risk assessment. In general, the surveys were well received within the communities, resulting in 100% …
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IMPACTS OF DIURNALLY EXPOSED SLIME LAYER HYDROGEN SULFIDE CONCENTRATIONS IN SEWER ATMOSPHERE
Hydrogen sulfide (H2S) is a major issue in wastewater collection systems. H2S can cause rapid damage to wastewater infrastructure, affects the publics quality of life through odor issues and is a safety concern for sewer workers. Relatively recent development and introduction of H2S data loggers …
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UNVEILING NOVEL CARDIOPROTECTIVE EFFECTS OF GYY4137, A SLOW-RELEASING HYDROGEN SULFIDE DONOR, AND THEIR RELATIONSHIP TO NEUROHORMONAL MODULATION AND MICRORNA PROFILES DURING MYOCARDIAL ISCHEMIC INJURY.
Hydrogen sulfide (H2S) is emerging as an important endogenous modulator in diverse physiological and pathophysiological events. Yet, its role on neurohormonal modulation and microRNA profiles during myocardial ischemic (MI) injury has not been clearly defined. This present study was designed to …
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Formaldehyde-MEA Triazine Based Hydrogen Sulfide Scavenger Behavior Study and Applications in the Oil and Gas Industry
Hydrogen sulfide (H2S) is an environmentally hazardous, corrosive and toxic gas in oil and gas productions. It must be removed to meet the pre-determined specification. There are many chemicals being used in the gas sweetening process. Formaldehyde-MEA Triazine is one of the common H2S scavengers …
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The Effect of Fungicide Residues and Yeast Assimilable Nitrogen on Fermentation Kinetics and H2S Production during Cider Fermentation
… the unique chemistry of apples and production of hydrogen sulfide (H2S) in cider fermentations. Yeast assimilable nitrogen (YAN) concentration and composition and residual fungicides influence H2S production by yeast during fermentation, but these factors have to date only been studied in wine …
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Hydrogen Sulfide Flux Measurements And Dispersion Modeling From Constr
… can cause malodorous conditions. However, hydrogen sulfide (h2s) has been identified as a principal odorous component from construction and demolition (c&d)debris landfills. Although several studies have reported the ambient concentrations of h2s near c&d landfills, few studies have …
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Biophysical and Functional Characterization of the Persulfide Sensor CstR from Staphylococcus aureus
… to as reactive sulfur species (RSS), include hydrogen sulfide (H2S) and low molecular weight per- and polysulfides and become deleterious at increasing concentrations. For example, H2S functions as a gaseous signaling molecule but at elevated levels can poison cytochrome c oxidase of the …
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Impact of Yeast Nutrient Supplementation Strategies on Hydrogen Sulfide Production during Cider Fermentation
Hydrogen Sulfide (H2S), is a negative off aroma produced during yeast fermentation and is common in cider and leads to consumer rejection. H2S has a very low odor detection threshold (ODT) and is often described as "rotten egg". H2S is produced when juice is deficient in yeast nutrients, such as …
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Cu2ZnSn(S,Se)4 photovoltaic absorber fabrication by hydride chalcogenization of electrodeposited precursors
… solution. Reaction of the metal precursors in hydrogen sulfide (H2S) and/or hydrogen selenide (H2Se) yields the quaternary films Cu2ZnSnS4 (CZTS), Cu2ZnSnSe4 (CZTSe), or CZTSSe, usually alongside a number of secondary phases. The effects of reaction conditions are studied to gain insight into …
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Synthesis of Inhibitors of Cystathionine β-Synthase
Hydrogen sulfide (H2S) is well known for its harmful effects to the environment, yet within the last decade evidence of its role as an endogenous gasotransmitter has surfaced. Both overproduction and underproduction of H2S can lead to detrimental health conditions; therefore, adequate metabolism of …
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Exploration of Hypotensive Effects of Novel Hydrogen Sulfide Donors: Mechanisms and Their Delivery
… a multi-targeted therapeutic approach utilizing hydrogen sulfide (H2S)-releasing donors, AMP and JDB, aimed at lowering the IOP through complementary mechanisms that involve H2S, nitric oxide (NO), and prostaglandins analog activity. Both compounds significantly reduced IOP in a normotensive …
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A field-based study of alternative microbial indicator tests for drinking water quality in Northern Ghana
… follows: (1) To confirm the accuracy of the 20ml hydrogen sulfide (H2S) test as a single presence/absence (P/A) indicator for fecal coliforms; (2) To establish the accuracy of as a single enumerative test for fecal coliforms; (3) To verify the accuracy of the 20 ml H2S test used in conjunction …
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Synthesis, Properties, and Biology of Advanced H2S-Releasing Materials
Hydrogen sulfide (H2S) is an endogenously produced signaling gas involved in numerous cellular functions. At the appropriate concentration, exogenous administration of this gasotransmitter regulates vasodilation, promotes angiogenesis of endothelial cells, and generally exhibits beneficial effects …
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Mechanisms of imporvement following functional inhibition of nitrosative stress after brun and smoke-induced acute lung injury
… lung sections.\r\nTreatment after ALI with a hydrogen sulfide (H2S) donor compound, a peroxynitrite scavenger, was tested to determine the effect on mortality, pulmonary shunt fraction and gas exchange. The H2S donor increased animal survival. Additionally the rapid decline in PaO2/FiO2, …
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INCREASING EFFICIENCY AND SUSTAINABILITY OF WASTE-TO-ENERGY SYSTEMS USING BIOCHAR FOR HYDROGEN SULFIDE CONTROL AND LIFE CYCLE ASSESSMENT
… treatment and significantly decreased the H2S concentration in the biogas by 66% - 83% compared to DM-only. The second objective was understanding the effect of hydrogen sulfide (H2S) scrubber management, operation, and maintenance parameters on H2S removal efficiency. Even though the …
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Hydrogen Sulfide in Glaucoma: Delivery System, Hypotensive and Neuroprotective Effects
… offer neuroprotection and regeneration of RGCs. Hydrogen sulfide (H2S), an endogenous gasotransmitter, is found to have potential therapeutic applications in glaucoma. H2S acts as a smooth muscle relaxant, decreases trabecular meshwork volume, and decreases the IOP. It also scavenges reactive …
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Preparation, Characterization and Toxicity Evaluation of a Novel Sustained Release Delivery System for a Hydrogen Sulfide Donor - GYY 4137
… the elevated IOP and provide RGC protection. Hydrogen sulfide (H2S) reportedly displays both of these activities in a concentration range of 10-200 μM. It can be toxic at a higher concentration and its donors are unstable in water. Thus, a search for a hydrophobic, sustained release delivery …
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Development of Polymeric Microparticle-Based Drug Delivery System for Sustained Delivery of H2S for Treatment of Glaucoma
… IOP and providing retinal neuroprotection. Hydrogen sulfide (H2S), an endogenous gasotransmitter, has shown therapeutic potential in glaucoma because of its dual action in lowering IOP and providing neuroprotection. However, the clinical application of H2S is challenging because of its …
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