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Showing 1 to 20 of 323 for “"H₂O₂"”.
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Vibrational Energies of the Hydrogen Bonds of H₃O₂⁻ and H₅O₂⁺
We approximate the vibrational energies of the symmetric and asymmetric stretches of the hydrogen bonds of the molecules H_3O_2^- and H_5O_2^+ by applying an improvement to the standard time-independent Born-Oppenheimer approximation. These two molecules are symmetric around a central hydrogen …
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Critical properties of NaCI-H₂O Solutions
Critical properties of the NaCI-H₂0 fluid system are of fundamental interest to a variety of geochemical applications including fluid inclusion studies, numerical modeling of hydrothermal systems, and development of theoretical models for two·component fluid systems. Although many workers have …
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H₂O D.C.: The Renaissance of Water Culture in D.C.
Washington DC is seen as a center of politics, bureaucracy, litigation, legislation, and the trading of power and resources. For this reason outsiders are both attracted to and repelled from our city. For many of us transplants and government workers, a large portion of our collective self-image is …
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A study of the system ZnSo₄ - H₂O at 25⁰C
From a study of the 25℃ isotherm the following factors are evident: Two hydrates of zinc sulphate exist at this temperature, the heptahydrate and the monohydrate. The transition point between the ZnSO₄·7H₂O and ZnSO₄·H₂O is given as 22.25% sulphuric acid and 22.81% zinc sulphate. The transition …
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Experimental Study of the PVTX Properties of the System H₂O-CH₄
The system H₂O-CH₄ is found in a variety of geological environments in the earth’s crust, from sedimentary basins to low grade metamorphic terrains. Knowledge of the PressureVolume-Temperature-Composition (PVTX) properties of the H₂O-CH₄ system is necessary to understand the role that these fluids …
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Oxidation of Disinfection Byproducts and Algae-related Odorants by UV/H₂O₂
… of the application and reaction mechanisms of UV/H₂O₂ for the simultaneous removal of regulated halogenated disinfection byproducts (DBPs) and odorous aldehydic algal byproducts in the presence of geosmin and 2-methylisoborneol, which are earthy-musty odorants that commonly occur in drinking …
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Phase equilibria and volumetric properties for the system NaCl-CaCl₂-H₂O
Low temperature phase relations in the ice-stable field of the system NaCl-CaCl₂-H₂O were determined under 1 atm. total pressure along the NaCl-H₂O and CaCl₂-H₂O binaries and along five pseudobinaries with constant NaCl/(NaCl+CaCl₂) weight ratios. The results are in excellent agreement with …
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Gas phase (C-H-O) carbidization of iron from hematite at 625 °C
Includes bibliographical references (pages 130-133).
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Membrane-supported hydrogen/syngas production using reactive H₂O/CO₂ splitting for energy storage
Energy storage technologies are crucial for supporting the fast expansion of intermittent renewable energy at the grid scale. One such technology is the efficient and economic conversion of H₂O and CO₂ into fuels utilizing excess thermal energy at intermediate temperatures. This thesis explores …
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Experimental Study of the PVTX Properties in Part of the Ternary System H₂O-NaCl-CO₂
Phase equilibria and volumetric properties in the system water-sodium chloride-carbon dioxide were determined experimentally for pressures between about 1 to 6 kbar, temperatures of 300° to 800°C, and fluid compositions up to 40 wt% NaCl and 20 mol% carbon dioxide, both relative to water. This was …
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The P. H. O. S. E. Design A Tool to Pursue Psychological Health during Long Duration Space Missions
The Psychological Health and Operational Simulation Environment (PHOSE) design looks to use Augmented Reality equipment and sensory technologies to build a psychologically enriching environment as well as training environments. Through virtual experiences, users would be able to mimic a large …
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Conversion ratios for plutonium recycle in light water reactors: breeding potential in D₂O-H₂O cooled reactors
The conversion properties of close packed, water cooled, plutonium fueled lattices are studied. Lattices with both ordinary water and light-heavy water mixtures are considered. The effects of volume fractions, plutonium concentrations, and heavy water fraction on the neutronics are studied through …
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Modeling and analysis of a H₂-H₂O driven reversible solid oxide cell system for electrical energy storage applications
The future of renewable energy resources, such as solar and wind is heavily reliant on energy storage. Solid oxide cells (SOCs) with bidirectional operation have advantages over other types of energy storage systems since they may be deployed in time-shifting, long-duration, and seasonal storage …
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Relation between surface structural and chemical properties of platinum nanoparticles and their catalytic activity in the decomposition of hydrogen peroxide
The disproportionation of H₂O₂ to H₂O and molecular O₂ catalyzed by platinum nanocatalysts is technologically very important in several energy conversion technologies, such as steam propellant thrust applications and hydrogen fuel cells. However, the mechanism of H₂O₂ decomposition on platinum has …
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Towards next-generation enzymatic generators of hydrogen peroxide in quantitative redox biology
Hydrogen peroxide (H₂O₂) is a natural byproduct of cellular metabolism that has also been implicated in numerous biological processes, including the respiratory burst, proliferation, apoptosis, and cellular signaling. H₂O₂ has been well studied using methodologies to both measure and perturb H₂O₂ …
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Investigating Tropospheric Hydrogen Peroxide Trends from 1950-2014
… HOx radicals (OH and HO₂) and hydrogen peroxide (H₂O₂). O₃ is the primary source for HOx radicals, while H₂O₂ is a key sink for HOx radicals that terminates the rapid cycling between OH and HO₂. The concentrations of the HOx radicals and H₂O₂ are difficult to measure directly, with scarce long …
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Antibacterial Activity of Hydrogen Peroxide Against Escherichia Coli O157:H7 and Salmonella Spp. in Fruit Juices, Both Alone and in Combination With Organic Acids
… cocktail. In the first study, 0.017% and 0.012% H₂O₂ was added in combination with 0.1% and 0.3% of the dominant organic acid (OA) to 4°C and 25°C juices, with samples taken each day for 21 days. H₂O₂ was a significant factor in all juices (p < 0.05) except white grape (lack of data), and both …
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An alternative path to physical form generation in pharmaceuticals
Six novel forms of carbamazepine (CBZ) were prepared and characterised by single crystal X-ray diffraction (SXD) and powder X-ray diffraction (PXRD). These were [CBZ(H)][Cl] form I, [CBZ(H)][Cl] form II, [CBZ(H)[Br] form I, [CBZ(H)][Br] form II, [CBZ(H)][Br].H₂O and CBZ₂.[H₃O][Cl].2H₂O. In five of …
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