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Showing 1 to 20 of 170 for “"Hydrogen Sulfide"”.
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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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On the Cellular Basis of Hydrogen Sulfide Toxicity
Hydrogen sulfide (H2S) produced by colonic sulfate-reducing bacteria represents an insult to the intestinal epithelium potentially contributing to chronic disorders that are dependent on gene-environment interactions. Clinical and epidemiologic studies reveal either persistent sulfate-reducing …
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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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Kinetics of Hydrogen Sulfide Oxidation in Sanitary Sewer Systems
There is a need to evaluate different technologies such as FeCl2, H2O2 and O2 addition as odor and corrosion control alternatives to determine required dosages and detention times. The goal of this research is to study the kinetics of H2S removal using the techniques commonly employed in sanitary …
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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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The Biogeochemistry of Hydrogen Sulfide in the Open Ocean
<p>Hydrogen sulfide is a poorly quantified component of the global sulfur cycle. In seawater, its dissolved species (dissolved sulfide) can react with trace metals to form dissolved complexes and insoluble compounds. Therefore, the study of dissolved° sulfide in the open ocean can yield a better …
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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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In vitro Sustained Release Delivery System for Hydrogen Sulfide Analogs
… towards optic nerve rescue and regeneration. Hydrogen sulfide is a gaseous molecule which has shown neuroprotectant action in humans and other mammals. In a recent study a hydrogen sulfide donor in low concentrations (micro molar) exhibited a time-dependent decrease in IOP indicating the role …
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The corrosion of steel in saline solutions of hydrogen sulfide.
Thesis: S.B., Massachusetts Institute of Technology, Department of Chemical Engineering, 1945
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Synthesis, evaluation, and applications of hydrogen sulfide-releasing supramolecular materials
… H2S-releasing materials over widely used sulfide salts. The macroscopic properties of peptide hydrogels could be further modulated to achieve additional control over the H2S release properties. We synthesized a series of peptide hydrogels incorporating different linker segments to study …
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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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Regulation of cataractogenesis in cultured bovine lenses by hydrogen sulfide donors
… cataractogenesis and assess the effect of hydrogen sulfide (H2S) on cataractogenesis. Bovine lenses were cultured in DMEM with AA (positive control) or compounds [L-cysteine, diallyl trisulfide (DATS) and GYY 4137 (GYY)] in presence or absence of hydrogen peroxide (H2O2). Lens light …
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Hydrogen Sulfide Emission and Control Parameters From Stored Liquid Swine Manure
… in the manure quite significantly. However, sulfides were not removed completely from the liquid manure once it was formed despite adding nitrates. Also, continuous application of nitrates may result in nitrate accumulation in the manure.
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Fluorometric Determination of Hydrogen-Sulfide and Sulfur-Dioxide in the Atmosphere
Made available in DSpace on 2014-12-13T20:09:46Z (GMT). No. of bitstreams: 1 7606962.pdf: 9640706 bytes, checksum: cf6d3a5a59c30dc1c94f9d7b21f970be (MD5) Previous issue date: 1975
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Carbon Dioxide and Hydrogen Sulfide Emission Factors Applicable to Wastewater Wet Wells
… ammonia, carbon dioxide, carbon monoxide, hydrogen sulfide and methane, in regard to odor nuisance, irritation, toxicity, and microbially induced corrosion. The extent of these problems depends on the emission rates of gases in the sewer atmosphere. To limit these kinds of problems an …
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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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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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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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