Results 121 to 130 of about 119,705 (176)
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.
Sascha Fröbel +3 more
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Steady-State Land Cover but Non-Steady-State Major Ion Chemistry in Urban Streams
Environmental Science & Technology, 2018 Sources of many major ions in urban streams remain ambiguous, particularly for ions unrelated to deicing salt use, and temporal patterns in concentrations are unstudied. We used 16 years of water chemistry data based on weekly samples from the Baltimore, MD, USA, metropolitan area and the Weighted Regressions on Time, Discharge, and Season approach to ...
Darcy Lynn Bird +3 more
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Steady states in hot atom chemistry
The Journal of Chemical Physics, 1978A 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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Science of The Total Environment, 2008 Criteria are needed for distinguishing naturally acid water from that acidified by air pollution, especially in the organic-rich waters of northern Sweden. The Steady-State Water Chemistry Model (SSWC) was augmented to include organic acidity so that it could predict pre-industrial pH in organic-rich waters.
Kevin Bishop +3 more
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The Journal of Membrane Biology, 2014 The mathematical model of Rahamathunissa and Rajendran (J Math Chem 44:849-861, 2008) in an amperometric biosensor response is discussed. In this paper, we have applied the shifted second kind Chebyshev wavelets (CW) to obtain the numerical solutions of reaction-diffusion equations containing a nonlinear term related to Michaelis-Menton kinetics of the
M. Mahalakshmi, G. Hariharan
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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 ...
Harald Sverdrup +5 more
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Chemistry and Transport of Potassium during the Non‐Steady State of Syenite Leaching
Soil Science Society of America Journal, 2017 Core Ideas A flow system for the release and extraction kinetics of ions from a rock fertilizer. The initial release of ions from syenite
Kejing Li, Christi A. Dawydiak
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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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Canadian 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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Journal of Mathematical Chemistry, 2015 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
M. Mahalakshmi, G. Hariharan
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