Results 271 to 280 of about 513,877 (318)
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Building a Steady Foundation through Equilibrium: Solution and Solid State Chemistry

Journal of Chemical Education, 2021
We have developed a new foundation-level course at our institution that links the concept of chemical equilibria from four of the traditional subdisciplines (analytical, biochemistry, inorganic, and physical). The course, entitled Solution and Solid State Chemistry (CHEM 210), is designed to serve our chemistry and biochemistry majors, as well as those
Deon T. Miles, Evan E. Joslin
openaire   +2 more sources

Critical loads and steady-state chemistry for streams in the state of Maryland

Environmental Pollution, 1992
The critical loads to streams, steady-state stream chemistry and catchment chemical weathering rate in 73 catchments has been determined in the state of Maryland, USA. It was calculated with the PROFILE model from chemical limits for biological indicators, soil mineralogy, soil texture, annual average temperature, average soil moisture, net long-term ...
Anthony Janicki   +5 more
openaire   +3 more sources

Steady state and time-resolved spectroscopic studies of the photochemistry of 1-arylsilacyclobutanes and the chemistry of 1-arylsilenes [PDF]

open access: possibleCanadian Journal of Chemistry, 1999
Direct photolysis of 1-phenylsilacyclobutane and 1-phenyl-, 1-(2-phenylethynyl)-, and 1-(4'-biphenylyl)-1-methylsilacyclobutane in hexane solution leads to the formation of ethylene and the corresponding 1-arylsilenes, which have been trapped by photolysis in the presence of methanol.
William J. Leigh   +4 more
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Multiple steady states in atmospheric chemistry

Journal of Geophysical Research: Atmospheres, 1993
The equations describing the distributions and concentrations of trace species are nonlinear and may thus possess more than one solution. Several authors have suggested that the steady‐state equations describing tropospheric and stratospheric chemistry may have multiple solutions, but the existence of such solutions has not been completely demonstrated.
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Extracting Picosecond Time Constants from Steady-State Spectroscopy: A Physical Chemistry Experiment

Journal of Chemical Education, 2013
Femtosecond spectroscopy is a key technique in modern physical chemistry research. Thus, femtosecond techniques, as well as molecular processes occurring on femto- to picosecond time scales, should be included in a physical chemistry curriculum. Usually, experiments covering the topic are challenging due to costly equipment and laser safety issues.
Peter Gilch   +3 more
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Steady states in hot atom chemistry

The Journal of Chemical Physics, 1978
A detailed comparison is made with the predictions of the hydrodynamic steady state theory of hot atom reactions developed by Keizer [J. Chem. Phys. 58, 4524 (1973)] and those obtained from a more precise moment method solution of the Boltzmann equation.
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Calculating critical loads of acid deposition with PROFILE ? A steady-state soil chemistry model

Water, Air, & Soil Pollution, 1992
A steady state soil chemistry model was used to calculate the critical load of acidity for forest soils and surface waters at Lake GArdsjon in S.W. Sweden. The critical load of all acid precursors (potential acidity) for the forest soil is 1.64 kmolc ha−1 yr−1, and 1.225 kmolc ha−1 yr−1 for surface waters.
Harald Sverdrup, Per Warfvinge
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The study of soil chemistry through quasi-steady-state models: I. Mathematical definition of model

Geochimica et Cosmochimica Acta, 1989
Abstract A mathematical method for studying the composition and speciation of soil solutions is presented. The method is formulated in general algebraic terms, and is adaptable to soil-water systems of virtually any chemical composition. Chemical processes in three different time frames are considered: fast, reversible processes, described in terms ...
Gerhard Furrer   +2 more
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The study of soil chemistry through quasi-steady-state models: II. Acidity of soil solution

Geochimica et Cosmochimica Acta, 1990
Abstract The acidity of three hypothetical soil solutions was studied with a quasi-steady-state model. Processes were assigned to one of three time scales: fast (processes at equilibrium), slow (processes for which the kinetics are specified explicitly), or very slow (processes that have a negligible effect on the steady-state solution).
John C. Westall   +2 more
openaire   +2 more sources

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