Results 1 to 10 of about 110,247 (183)
A steady-state continuous flow chamber for the study of daytime and nighttime chemistry under atmospherically relevant NO levels [PDF]
Atmospheric Measurement Techniques, 2018 Experiments performed in laboratory chambers have contributed significantly to the understanding of the fundamental kinetics and mechanisms of the chemical reactions occurring in the atmosphere. Two chemical regimes, classified as high-NO vs.
X. Zhang +7 more
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Steady-State Distributions of O2 and OH in the High Atmosphere and Implications in the Ozone Chemistry [PDF]
The Journal of Physical Chemistry A, 2003 Although steady-state distributions are commonly accepted to be of the Boltzmann-type, such an assumption can be rather unrealistic when modeling the high atmosphere. Corroborating evidence is reported for the vibrationaland rotational distributions of O 2 and OH from detailed trajectory calculations, which shows that the thermalization assumption is ...
A. J. C. Varandas
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Desorption processes in molecular clouds: quasi-steady-state chemistry [PDF]
Monthly Notices of the Royal Astronomical Society, 1993 The effects of mantle desorption due to cosmic rays on the chemistry of interstellar clouds are modelled. Two desorption mechanisms are considered - direct cosmic ray heating of dust grains and cosmic ray induced photodesorption. Their effects at densities typical of a molecular cloud and a dense core are investigated.
Karen Willacy, D. A. Williams
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A spheroidal weathering model coupling porewater chemistry to soil thicknesses during steady-state denudation [PDF]
Earth and Planetary Science Letters, 2006 Abstract Spheroidal weathering, a common mechanism that initiates the transformation of bedrock to saprolite, creates concentric fractures demarcating relatively unaltered corestones and progressively more altered rindlets. In the spheroidally weathering Rio Blanco quartz diorite (Puerto Rico), diffusion of oxygen into corestones initiates oxidation ...
Robert D. Fletcher +2 more
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Steady State Analysis of Tropospheric Chemistry
, 2000 Hydroxyl radical HO plays a central role in controlling chemical processes in the troposphere. Current mechanisms are believed to accurately describe its formation, destruction and interaction with other atmospheric trace gases in clean air. Hydroperoxyl radical H0â‚‚ is Iinked to HO in several chain processes and serves among other roles as a ...
Pan Wen
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Symbolic construction of the chemical Jacobian of quasi-steady state (QSS) chemistries for Exascale computing platforms [PDF]
Combustion and FlameThe Quasi-Steady State Approximation (QSSA) can be an effective tool for reducing the size and stiffness of chemical mechanisms for implementation in computational reacting flow solvers. However, for many applications, stiffness remains, and the resulting model requires implicit methods for efficient time integration.
Malik Hassanaly +7 more
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Flame Chemistry in the ISO/TS 19700 Steady State Tube Furnace
, 2023 The steady state tube furnace (SSTF) (ISO/TS 19700) was used to assess the effects altering the reaction zone of a flame had on smoke toxicity measurements. The gas inlet of the apparatus was modified to allow for a mixture of nitrogen and air to be introduced into the system.
Gabrielle Peck, R Robert Hayes
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Journal of Engineering for Gas Turbines and Power, 2018 The prospect of analysis-driven precalibration of a modern diesel engine is extremely valuable in order to significantly reduce hardware investments and accelerate engine designs compliant with stricter fuel economy regulations. Advanced modeling tools, such as CFD, are often used with the goal of streamlining significant portions of the calibration ...
Jian Gao +7 more
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Critical Loads of Acid Deposition for Wilderness Lakes in the Sierra Nevada (California) Estimated by the Steady-State Water Chemistry Model [PDF]
Water, Air, & Soil Pollution, 2013 Major ion chemistry (2000–2009) from 208 lakes (342 sample dates and 600 samples) in class I and II wilderness areas of the Sierra Nevada was used in the Steady-State Water Chemistry (SSWC) model to estimate critical loads for acid deposition and investigate the current vulnerability of high elevation lakes to acid deposition. The majority of the lakes
Glenn D. Shaw +4 more
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, 2018 Steady-state and time-resolved fluorescence techniques enjoy widespread applicability in domains ranging from biology to materials science owing to their extraordinary sensitivity and dynamic range. Among the most useful of these techniques is time-correlated, single-photon counting, which forms the basis of another: fluorescence lifetime imaging using
Kalyan Santra
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