نتایج جستجو برای: External airliftbioreactor

تعداد نتایج: 190212  

Journal: :iranian journal of biotechnology 2007
marjan varedi kolaei ramin karimzadeh seyed abbas shojaosadati jafar towfighi

in this work, mathematical modeling of microbial(trichosporon sp.) biomass production in a stirred tankbioreactor and in an external airlift bioreactor has beeninvestigated. a model based on a tanks-in-seriesmodel without back-flow has been used to simulate theproduction of single cell protein in the external airliftbioreactor under an unsteady condition and withoutoxygen limitation, utilizing ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه مازندران - دانشکده علوم انسانی و اجتماعی 1392

tourism , today as one of the ways to make money, create jobs , and social and political interactions is considered. this paper aims to examine the strengths and weaknesses of tourism development in mahmoud abad ( mazandaran ). the research method in this study is " descriptive - analytical " and to collection of data used field methods such as questionnaires and documentation - library. the sa...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه یاسوج - دانشکده علوم 1391

in this investigation the effect of external field on the electron density of nanostructures of cds, cdse, cdte, gaas and polymeric structure of three, four, five and six units of cds as a kind of nanosolar cells has been studied theoretically. as modeling this system in nanodimension, molecular structures has used. specific properties of molecular structures permit us to consider different sym...

2004
Stefan Edelkamp Shahid Jabbar Stefan Schroedl

In this paper we study External A*, a variant of the internal A* algorithm that employs external memory. The approach applies to implicit, undirected, unweighted state space problem graphs with consistent estimates. The complexity of the External algorithm is almost linear in external sorting time and accumulates to O(sort(|E|) + scan(|V |)) I/Os, where V and E are the set of nodes and edges in...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه مازندران 1388

some researches made in the field of agency problem issue, deal with the role of control systems regarding owners and managers. in this research the relationship between the two control mechanisms, namely the voluntary disclosure (external control mechanism) and outside directors (internal control mechanism), which are reductive of agency problems, has been studied. for this reason, a sample ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - پژوهشکده فنی و مهندسی 1388

asymmetric polyethersulfone (pes) microfiltration flat sheet membranes were composed by the phase inversion method (pim) and were used as supports. composite membranes were fabricated by coating silicone rubber as selective layer. effect of different concentrations of pes and pdms and different solvent such as nmp, dmf and dms effects as pes solvents and support thickness and different coagulat...

Journal: :trauma monthly 0
shahram nazerani department of surgery, tehran university of medical sciences, ir iran mohammad hosein hosein kalantar motamedi trauma research center, baqiyatallah university of medical sciences, office of the editor, ir iran +98-9121937154, [email protected]; trauma research center, baqiyatallah university of medical sciences, office of the editor, ir iran +98-9121937154, [email protected] adel ebrahimpoor department of orthopedics, shahid beheshti university of medical sciences, ir iran jalal vahedian department of surgery, tehran university of medical sciences, ir iran tara nazerani department of surgery, tehran university of medical sciences, ir iran tina nazerani department of surgery, tehran university of medical sciences, ir iran

background with the growing interest in long bone distraction several types of distractors have been introduced; all have the same principle of an outer structure which acts like a scaffold and the distracting mechanism is a separate device which is mounted on this outer structure. objectives we have used a simple and very light weight external fixator we designed and discuss the results of dis...

Journal: :journal of physical & theoretical chemistry 2014
f. soheilian m.r. soltani m. firoozi s. a. hosseini

the entanglement at zero-temperature is studied in a two-qubit xz spin-1/2 chain model in anexternal magnetic field which is applied in the z direction. we have obtained an analytical relation forthe effect of the external magnetic field on the concurrence. it is shown that the ground state of thesystem depends on the strength of exchange coupling. we have shown that the analytical relation oft...

Journal: :international journal of agricultural management and development 2011
s.o. anyanwu

the study compared economic efficiency among smallholder farmers who practiced low external input technology [leit] and high external input technology [heit] agriculture in a harsh macroeconomic environment typified by inadequate fertilizer subsidy in imo state, nigeria. cross sectional data generated from 160 smallholder farmers randomly selected from 2 out of the 3 agricultural zones in imo s...

Journal: :acta medica iranica 0
m. abdollahi. m. seddighi chafjiri. n. ostad m. shariatpanahi

the teratogenicity of cadmium exposure was studied in virgin nimri rats aged 10-13 weeks. pregnant animals were fed cadmium sulfate equivalent to doses of 1,4 and 7 mg/kg/day of cadmium by oral gavage on the day 7 of gestation. on the day 18 of gestation, fetuses were delivered and examined for external and skeletal malformations. total percent of malformed fetuses in rats treated by different ...

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