Results 21 to 30 of about 3,443,174 (389)

Fractal fractional derivative on chemistry kinetics hires problem

AIMS Mathematics, 2021
<abstract> <p>In this work, we construct the fractional order model for chemical kinetics issues utilizing novel fractal operators such as fractal fractional by using generalized Mittag-Leffler Kernel. To overcome the constraints of the traditional Riemann-Liouville and Caputo fractional derivatives, a novel notion of fractional ...
Muhammad Aslam, Muhammad Farman, Hijaz Ahmad, Tuan Nguyen Gia, Aqeel Ahmad, Sameh Askar   +5 more
openaire   +3 more sources

THE CHEMISTRY OF INTERSTELLAR ARGONIUM AND OTHER PROBES OF THE MOLECULAR FRACTION IN DIFFUSE CLOUDS [PDF]

, 2016
We present a general parameter study in which the abundance of interstellar argonium (ArH+) is predicted using a model for the physics and chemistry of diffuse interstellar gas clouds.
D. Neufeld, M. Wolfire
semanticscholar   +1 more source

Anion Exchange Ionomers: Impact of Chemistry on Thin‐Film Properties

Advanced Functional Materials, 2021
Ionomer thin‐films (i.e., 20–100 nm) on supports serve as model systems to understand ionomer‐catalyst interfacial behavior as well as the confinement‐driven deviation in properties from bulk membranes.
Xiaoyan Luo, D. Kushner, Jonathan Li, Eun Joo Park, Y. Kim, A. Kusoglu   +5 more
semanticscholar   +1 more source

Chemistry, street canyon geometry, and emissions effects on NO2 “hotspots” and regulatory “wiggle room”

npj Climate and Atmospheric Science, 2022
The extent to which nitrogen dioxide (NO2) undergoes complex chemical-transport processes near strong nitrogen-oxide sources in street canyons is not fully understood.
Yuqing Dai, Xiaoming Cai, Jian Zhong, A. Robert MacKenzie   +3 more
doaj   +1 more source

A diurnal story of Δ17O( $$\rm{NO}_{3}^{-}$$ NO 3 − ) in urban Nanjing and its implication for nitrate aerosol formation

npj Climate and Atmospheric Science, 2022
Inorganic nitrate production is critical in atmospheric chemistry that reflects the oxidation capacity and the acidity of the atmosphere. Here we use the oxygen anomaly of nitrate (Δ17O( $$\rm{NO}_{3}^{-}$$ NO 3 − )) in high-time-resolved (3 h) aerosols ...
Yan-Lin Zhang, Wenqi Zhang, Mei-Yi Fan, Jianghanyang Li, Huan Fang, Fang Cao, Yu-Chi Lin, Benjamin Paul Wilkins, Xiaoyan Liu, Mengying Bao, Yihang Hong, Greg Michalski   +11 more
doaj   +1 more source

Composite catalysts for the catalytic processing of fuel oil [PDF]

MATEC Web of Conferences, 2021
The paper describes the catalytic cracking of heavy petroleum feedstock on catalysts based natural Taizhuzgen zeolite and Narynkol clay (Kazakhstan). Catalytic cracking was studied on fuel oil of the M-100 brand taken from the LLP Pavlodar Oil Chemistry ...
Shakiyeva Tatyana, Sassykova Larissa, Khamlenko Anastassiya, Dossumova Binara, Sassykova Albina, Muratova Albina, Zhumagali Madina, Zhakirova Nurbubi, Abildin Tleutai   +8 more
doaj   +1 more source

Global atmospheric chemistry: Integrating over fractional cloud cover [PDF]

Journal of Geophysical Research: Atmospheres, 2007
A new approach defined here allows for the averaging of photochemistry over complex cloud fields within a grid square and can be readily implemented in current global models. As diagnosed from observations or meteorological models, fractional cloud cover with many overlying cloud layers can generate hundreds to thousands of different cloud profiles per
Neu, Jessica L., Prather, Michael J., Penner, Joyce E.   +2 more
openaire   +3 more sources

Physical descriptor for the Gibbs energy of inorganic crystalline solids and temperature-dependent materials chemistry [PDF]

Nature Communications, 2018
The Gibbs energy, G, determines the equilibrium conditions of chemical reactions and materials stability. Despite this fundamental and ubiquitous role, G has been tabulated for only a small fraction of known inorganic compounds, impeding a comprehensive ...
Christopher J. Bartel, Samantha L. Millican, Ann M. Deml, John R. Rumptz, W. Tumas, A. Weimer, S. Lany, V. Stevanović, C. Musgrave, A. Holder   +9 more
semanticscholar   +1 more source

Air–snowpack exchange of bromine, ozone and mercury in the springtime Arctic simulated by the 1-D model PHANTAS – Part 1: In-snow bromine activation and its impact on ozone [PDF]

Atmospheric Chemistry and Physics, 2014
To provide a theoretical framework towards a better understanding of ozone depletion events (ODEs) and atmospheric mercury depletion events (AMDEs) in the polar boundary layer, we have developed a one-dimensional model that simulates multiphase chemistry
K. Toyota, J. C. McConnell, R. M. Staebler, A. P. Dastoor   +3 more
doaj   +1 more source

Analysis of auto-ignition of heated hydrogen-air mixtures with different detailed reaction mechanisms [PDF]

, 2011
Auto-ignition processes of hydrogen, diluted with nitrogen, in heated air are numerically investigated by means of an unsteady laminar flamelet approach in mixture fraction space. The focus is on the auto-ignition delay time and the most reactive mixture
Merci, Bart, Stankovic, Ivana
core   +1 more source