نتایج جستجو برای: Kinetics Model

تعداد نتایج: 2181053  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان 1389

run-out-table (rot) is located between last finishing stand and down coiler in a hot strip mill. as the hot steel strip passes from rot, water jets impact on it from top and bottom and strip temperature decreases approximately from 800-950 °c to 500-750°c. the temperature history that strip experience while passing through rot affects significantly the metallurgical and mechanical properties, s...

Journal: :journal of agricultural science and technology 2015
s. ansari n. maftoon-azad a. farahnaky e. hosseini gh. asadi

in this research, rehydration behavior of dried figs was studied at different temperatures (25, 60, 70, 80, and 90°c). the rehydration kinetic was examined using the four most frequently used empirical models, namely, weibull, peleg, first-order, and exponential association models. the weibull model gave the highest coefficient of determination (r2) and the lowest values of root mean square err...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2007
reza ebrahimi kahrizsangi mohammad hasan abbasi ali saidi

the kinetics of molybdenite oxidation was studied by non-isothermal tga-dta with heating rate 5 ºc.min-1.the model-fitting kinetic approach applied to tga data .the coats-redfern method used for model fitting. the popular model-fitting gives excellent fit for non-isothermal data in chemically controlled regime. the apparent activation energy was determined to be about 34.2 kcalmol-1 with pre-ex...

Journal: :iranian journal of parasitology 0
vikrant sudan college of veterinary sciences & animal husbandry, u. p. pandit deen dayal upadhyaya pashu chikitsa vigyan vishwavidyalaya evam go anusandhan sansthan (duvasu), mathura, india. a k tewari division of parasitology, indian veterinary research institute (ivri), india. harkirat singh division of parasitology, gadvasu, ludhiana.

background: toxoplasma gondii , an apicomplexan parasite, is capable of infecting a broad range of intermediate warm-blooded hosts including humans. the parasite seems to be capable of altering the natural behavior of the host to favor its trans-mission in the environment. the aim of this study was to evaluate the course, alter-ations in behavior along with normal kinetics of the abnormally ind...

Journal: :int. journal of mining & geo-engineering 2012
a. agah f. doulati ardejani h. ghoreishi

risk-based assessment methods are commonly used at the contaminated sites by hydrocarbon pollutants. this paper presents the results of a two-dimensional finite volume model of reactive transport of biodegradable btex which have been developed for the saturated zone of an unconfined aquifer in the pump station area of tehran oil refinery, iran. the model governing equations were numerically sol...

Journal: :iranian journal of science and technology (sciences) 2015
m. zahedifar

an improved mixed order model is presented to describe the thermolumunescence (tl) glow peaks. in this model a fraction of charge carriers, which undergo nonradiative recombination following thermal excitation is taken into account. therefore, it is expected that the proposed model will produce more realistic kinetic parameters than that of mixed order model. the tl glow curves generated by the...

Journal: :journal of agricultural science and technology 2010
m. tahmasebi t. tavakkoli hashjin m. h. khoshtaghaza a. m. nikbakht

drying characteristics of quercus were determined experimentally as a function of temperature, air velocity, and variety (quercus persica and quercus libani). in order to estimate and select a suitable drying curve, five different thin layer drying models were fitted to the experimental data. experiments were performed at the air temperatures of 50, 60 and 70°c. at each temperature level, two a...

Journal: :physical chemistry and electrochemistry 0

on the basis of experimental data a kinetic model for the heterogeneous interaction between alkylperoxyradicals and organic compounds in langmuir- hinshelwood approach at room temperature has been offered.the effect of oxygen on the kinetics of process in the presence, [o2]o = 1 x 1011 – 1.6 x 1012 molecules.cm-2, and absence of oxygen has been analyzed. over time the chain degenerate branching...

Journal: :iranian journal of biotechnology 2013
davood mazaheri seyed abbas shojaosadati

context:in this review, we discuss empirical and stoichiometric models, which have been developed recently in ssf processes and the influence of environmental conditions on the variables of these models. additionally, new studies on modeling of product formation are also mentioned. evidence acquisition:solid-state fermentation (ssf) is recognized as a cheap process for producing many valuable p...

Journal: :journal of the iranian chemical research 0
rais ahmad environmental research laboratory, department of applied chemistry, faculty of engineering and technology, aligarh muslim university, aligarh, india rajeev kumar environmental research laboratory, department of applied chemistry, faculty of engineering and technology, aligarh muslim university, aligarh, india

ginger waste material (gwm) has been utilized as adsorbent for removal of hazardouspatent blue vf (pbvf) dye from aqueous solution. batch adsorption experiments wereperformed as a function of ph, contact time, dye concentration, adsorbent dose and temperature.the optimum ph required for the maximum adsorption was found to be 2. the experimentalequilibrium adsorption data were tested using langm...

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