نتایج جستجو برای: arrhenius equation

تعداد نتایج: 232044  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده ریاضی 1393

در ابتدا به طور مختصر ارتباط بین مسائل تغییراتی و معادلات دیفرانسیل را بیان می کنیم. همان طور که می دانیم هر معادله دیفرانسیل را می توان به صورت ‎egin{equation} label{yek}‎ ‎a(u)= 0‎ ‎end{equation}‎ نوشت، که در آن ‎$ a(u) $‎ یک عملگر دیفرانسیل معمولی یا جزئی خطی یا غیرخطی و ‎$ u $‎ مجهول می باشد. برای حل این معادلات و به خصوص معادلات دیفرانسیل جزیی غیرخطی راه حل مشخصی وجود ندارد.حساب تغییر...

ژورنال: مواد پرانرژی 2019

Cylotrimethylenetrinitramine (RDX), with the chemical formula C3H6N6O6, is an energetic organic molecule used widely in commodities of explosives. Its partial stimulation results in decomposition reaction at very high rate. Molecular dynamic technique and LAMMPS code with ReaxFF-lg were employed to simulate initiation of RDX. Potential energy variations of the system were calculated for five di...

Journal: :IOP conference series 2022

Abstract Rendang is a famous traditional food from West Sumatra, Indonesia. Oyster mushroom rendang made oyster mushrooms. Based on its composition, the degradation of fat critical point during storage. Proper packaging can extend shelf life rendang. The purpose this study was to determine that pack in vacuum and no using Accelerated Shelf-Life Testing (ASLT) method according Arrhenius equation...

2013
A. J. Lowe K. A. Keogh B. E. Murphy O. Lübben S. A. Krasnikov I. V. Shvets

4 ABSTRACT: In this work, an Arrhenius-based model for the 5 high-temperature reduction and oxidation of CeO2 is 6 developed. The model is shown to agree well with both 7 literature data for the equilibrium oxygen vacancy concen8 tration and novel experimental kinetics of oxidation and 9 reduction obtained by the authors. The form of the Arrhenius 10 rate equation was determined from the proper...

2008
J. H. BROWN A. P. ALLEN

Rose and Caron (2007) have compiled a comprehensive data set of individual growth rates of planktonic protists in an attempt to answer a fundamental question in marine ecology: ‘‘Why are blooms of phytoplankton such common events in the ocean?’’. They reach the interesting conclusion that, because the temperature dependence of the growth rate of heterotrophic protists is much stronger than that...

Journal: :Protein expression and purification 2013
Yonca Avci Duman Erdem Kaya

In this study chick pea β-galactosidase was first time purified and recovered in single step by three phase partitioning (TPP). Optimal purification parameters for TPP were 60% ammonium sulfate saturation (w/v) with 1:0.5 (v/v) ratio of crude extract:t-butanol at pH 6.8, which gave 10.1 purification fold with 133% recovery of β-galactosidase. SDS-PAGE analysis showed that protein has two subuni...

Journal: :Tribology International 2021

Mechanical activation in mechanical removal of GaN using diamond tip and mechanochemical Al2O3 are described by the Archard equation mechanically assisted Arrhenius-type kinetic model, respectively. Evident material-removal under elastic contact occurs with assistance interfacial reactions. By analyzing reactions model Hertzian mechanics, critical volume barrier determined semiquantitatively. T...

Journal: :The Journal of chemical physics 2011
Yuri P Kalmykov Sergey V Titov William T Coffey

Inertial effects in the rotational brownian motion in space of a rigid dipolar rotator (needle) in a uniaxial potential biased by an external field giving rise to asymmetry are treated via the infinite hierarchy of differential-recurrence relations for the statistical moments (orientational correlation functions) obtained by averaging the Euler-Langevin equation over its realizations in phase s...

2015
T. Wang F. Zhang L. Yang X. W. Fang S. H. Zhou M. J. Kramer C. Z. Wang K. M. Ho R. E. Napolitano

Liquid phase diffusion plays a critical role in phase transformations (e.g. glass transformation and devitrification) observed in marginal glass forming systems such as Al-Sm. Controlling transformation pathways in such cases requires a comprehensive description of diffusivity, including the associated composition and temperature dependencies. In the computational study reported here, we examin...

Journal: :Chemosphere 2001
L B Tichenor A El-Sinawi T Yamada P H Taylor J Peng X Hu P Marshall

Rate coefficients are reported for the gas-phase reaction of the hydroxyl radical (OH) with C2HCl3 (k(1)) and C2Cl4 (k2) over an extended temperature range at 740+/-10 Torr in a He bath gas. These absolute rate measurements were accomplished using a laser photolysis/laser-induced fluorescence (LP/LIF) technique under slow flow conditions. The simple Arrhenius equation adequately describes the l...

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