Results 251 to 260 of about 513,877 (318)
Applications of non‐steady‐state kinetics in physical organic chemistry: guidelines for the resolution of the kinetics of complex reaction mechanisms [PDF]
Journal of Physical Organic Chemistry, 2001 AbstractThe resolution of the kinetics of the reversible consecutive second‐order reaction mechanism involving the formation of a kinetically significant intermediate, which does not reach steady state before late in the first half‐life, followed by an irreversible product‐forming reaction is discussed. It is shown that an apparent second‐order rate
Vernon D. Parker, Yi×ing Zhao
+4 more sources
Steady State Instability and Oscillation in Simplified Models of Tropospheric Chemistry
The Journal of Physical Chemistry A, 2001 Three components have been identified as being common to oscillation in five related but increasingly complex models of tropospheric chemistry. The first of these components is an NOx-empty/refill cycle in which [NOx] grows or declines, depending upon the relative source rates of NOx and HOx, the latter being generally proportional to the rate of ...
Mark R. Tinsley, Richard J. Field
openalex +3 more sources
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2020 The impact of glycosaminoglycan (chondroitin sulphate, CS) on bone morphogenetic protein - 2 (BMP - 2) structure, stability (thermal and chemical), association kinetics and conformation was monitored by multiple spectroscopic techniques (UV-Visible, fluorescence and circular dichroism). The absorbance in peptide region and fluorescence intensity of BMP
Monidipa Konar, Harekrushna Sahoo
openalex +4 more sources
Combustion Theory and Modelling, 2003 Splitting techniques have been used extensively for computing reacting flows with detailed chemistry. Nevertheless, there are still some open questions with respect to efficiency and the error introduced by splitting. In this paper, the accuracy and effectiveness of split-operator methods for computing steady-state reacting flows are determined.
Douglas Schwer +3 more
openalex +3 more sources
Improved Quasi-Steady-State-Approximation Methods for Atmospheric Chemistry Integration
SIAM Journal on Scientific Computing, 1997 In the last fifteen years the quasi-steady-state-approximation (QSSA) method has been a commonly used method for integrating stiff ordinary differential equations arising from atmospheric chemistry problems. In this paper a theoretical analysis of the QSSA method is developed, stressing its strengths and its weaknesses.
Laurent O. Jay +3 more
openalex +3 more sources
Histochemistry, 1985 A number of organs from adult female mice were investigated after continuous application of the anticonvulsant drug valproic acid (VPA) by enzyme cytochemistry, light and electron microscopy, pharmacokinetics and clinical chemistry. VPA plasma levels were maintained between 55 micrograms/ml and 67 micrograms/ml for three days following subcutaneous ...
R. Graf +5 more
openalex +4 more sources
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
openalex +4 more sources
Environmental Pollution, 1989 Data on deposition and streamwater chemistry, obtained for the upper catchment of the River Duddon in the 1970s and 1980s, are reviewed. These data, together with soil chemical data, are used to deduce key processes in the deposition-catchment interaction, the analysis being based on current concepts of acidification.
Edward Tipping
openalex +4 more sources