نتایج جستجو برای: arrhenius

تعداد نتایج: 3018  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2003
Juan P Garrahan David Chandler

We introduce a coarse-grained model for atomic glass formers. Its elements are physically motivated local microscopic dynamical rules parameterized by observables. Results of the model are established and used to interpret the measured behaviors of supercooled fluids approaching glass transitions. The model predicts the presence of a crossover from hierarchical super-Arrhenius dynamics at short...

Journal: :The Journal of General Physiology 2003
Selig Hecht

1. The effect of temperature on the reaction time of Mya to light is mainly confined to the latent period. The sensitization period, representing a photochemical process, is changed comparatively little. 2. The relation between the latent period and the temperature is adequately expressed by the Arrhenius equation, for temperatures below 21 degrees C. Above this temperature, the latent period b...

Journal: :Physics in medicine and biology 2000
M N Iizuka I A Vitkin M C Kolios M D Sherar

A nonlinear mathematical model was developed and experimentally validated to investigate the effects of changes in optical properties during interstitial laser photocoagulation (ILP). The effects of dynamic optical properties were calculated using the Arrhenius damage model, resulting in a nonlinear optothermal response. This response was experimentally validated by measuring the temperature ri...

Journal: :The Journal of chemical physics 2010
D Fragiadakis C M Roland R Casalini

The dielectric spectra of most simple liquids are characterized by two relaxation processes: (i) the alpha-process, an intense, broad non-Debye relaxation with a non-Arrhenius temperature dependence and (ii) a beta process, evident mainly below the glass transition and having nearly Arrhenius temperature behavior. However, the dielectric spectra of monoalcohols show three processes: two that re...

2018
Norazlin Abdullah Nyuk L Chin Yus A Yusof Rosnita A Talib

This study has modeled the rheological behavior of thermosonic extracted pink-fleshed guava, pink-fleshed pomelo, and soursop juice concentrates at different concentrations and temperatures. The effects of concentration on consistency coefficient (K) and flow behavior index (n) of the fruit juice concentrates was modeled using a master curve which utilized the concentration-temperature shifting...

2011
Yu-Kuo Wang Sheng-Cih Huang Yi-Fang Wu Yu-Ching Chen Yen-Ling Lin Manoswini Nayak Yan Ren Lin Wen-Hung Chen Yi-Rong Chiu Thomas Tien-Hsiung Li Bo-Sou Yeh Tung-Kung Wu

Recombinant thermostable direct hemolysin from Grimontia hollisae (Gh-rTDH) exhibits paradoxical Arrhenius effect, where the hemolytic activity is inactivated by heating at 60 °C but is reactivated by additional heating above 80 °C. This study investigated individual or collective mutational effect of Tyr53, Thr59, and Ser63 positions of Gh-rTDH on hemolytic activity, Arrhenius effect, and biop...

2014
Guo-zheng Quan Chun-tang Yu Ying-ying Liu Yu-feng Xia

The stress-strain data of 20MnNiMo alloy were collected from a series of hot compressions on Gleeble-1500 thermal-mechanical simulator in the temperature range of 1173 ∼ 1473 K and strain rate range of 0.01 ∼ 10 s(-1). Based on the experimental data, the improved Arrhenius-type constitutive model and the artificial neural network (ANN) model were established to predict the high temperature flow...

2007
Pradeep Kumar Giancarlo Franzese H. Eugene Stanley

On decreasing the temperature T , supercooled water and other tetrahedral network-forming liquids, such as BeF2 or SiO2, appear to display a dynamic crossover from non-Arrhenius dynamics (with T -dependent activation energy) to Arrhenius dynamics (with constant activation energy). Simulations for water models show that this crossover occurs on crossing the Widom line TW (P ), the locus of maxim...

Journal: :Biophysical journal 2009
Jing Chen John Neu Makoto Miyata George Oster

Mycoplasmas exhibit a novel, substrate-dependent gliding motility that is driven by approximately 400 "leg" proteins. The legs interact with the substrate and transmit the forces generated by an assembly of ATPase motors. The velocity of the cell increases linearly by nearly 10-fold over a narrow temperature range of 10-40 degrees C. This corresponds to an Arrhenius factor that decreases from a...

2016
Guo-zheng Quan Xuan Wang

Abstract: In order to predict hot deformation behavior of superalloy nimonic 80A, a back-propagational artificial neural network (BP-ANN) and strain-dependent Arrhenius-type model were established based on the experimental data from isothermal compression tests on a Gleeble-3500 thermo-mechanical simulator at temperatures ranging of 1050–1250 ̋C, strain rates ranging of 0.01–10.0 s ́1. A comparis...

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