نتایج جستجو برای: ip 025 μm and obtained from sigma chemical co

تعداد نتایج: 17681733  

Journal: :international journal of environmental research 0
h. hoveidi graduate faculty of environment, university of tehran, tehran, iran h. sid kalal nfcrs, nuclear science and technology research institute, aeoi, p.o. box 11365-3486, tehran, iran g. nabi bidhendi graduate faculty of environment, university of tehran, tehran, iran h. rashedi biotechnology group school of chemical engineering college of engineering, university of tehran p.o.box:11155-4563,tehran, iran d. vafaei mehr university of tehran, aras international campus, aras, iran

furan is a possible human carcinogen in many types of foods. a new and sensitive electroanalytical method for determination of furan has been developed and validated. the best condition forelectrochemical response was obtained with 0.1 m britton-rabinson buffer solution (ph=5) a glassy carbonelectrode (gce) was used as the working electrode, a ag/agcl/ kcl(sat.) electrode served as the referenc...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی 1392

flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان - دانشکده ادبیات و علوم انسانی 1391

terms of address as an important linguistics items provide valuable information about the interlocutors, their relationship and their circumstances. this study was done to investigate the change route of persian address terms in the two recent centuries including three historical periods of qajar, pahlavi and after the islamic revolution. data were extracted from a corpus consisting 24 novels w...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده ادبیات و علوم انسانی 1390

abstract: advertisements are the most accessible type of authentic materials, and this is one reason why they are used more and more in english teaching classes. for this cause, studies in the field of advertisements are very widespread nowadays. for pun is one aspect which makes advertisements more interesting, it is used more than before in advertisements. use of puns makes an advertisement m...

2006
Pulak K Chowdhury Abu S Reaz Ta-Chun Lin Mohammed Atiquzzaman

In this paper, we propose and evaluate a novel transport layer mobility management scheme: Seamless IP diversity based Generalized Mobility Architecture (SIGMA). SIGMA provides seamless handover for mobile hosts and is based on SCTP, which is a new reliable transport protocol introduced by IETF to transport SS7 signaling messages over IP network. We also show that our handover scheme can greatl...

2002
Natasha Greene

We present measurements of aerosols acquired with a differential mobility analyzer – condensation particle counter (DMA-CPC) system aboard a P-3 flight from Miami, FL to Bermuda during Hurricane Erika in 1997. We have analyzed particle number densities as a function of particle diameter, wind speed, and distance from the eye of the hurricane. Our results indicate that particles with diameters l...

Journal: :The Journal of chemical physics 2005
A Z Panagiotopoulos

Thermodynamic properties of several lattice hard-sphere models were obtained from grand canonical histogram- reweighting Monte Carlo simulations. Sphere centers occupy positions on a simple cubic lattice of unit spacing and exclude neighboring sites up to a distance sigma. The nearestneighbor exclusion model, sigma = radical2, was previously found to have a second-order transition. Models with ...

Journal: :annals of military and health science research 0
محمد محسن همایونی mohamad mohsen homayoni department of medical parasitology and mycology, school of medicine, shahid beheshti university of medical sciences, tehran, iran کیوان مجیدزاده اردبیلی keivan majidzadeh-a tasnim biotechnology of research center, aja university of medical science, iran, tehran نیلوفر تقی پور niloofar taghipour department of medical parasitology and mycology, school of medicine, shahid beheshti university of medical sciences, tehran, iran نیلوفر خلجی niloufar khalaji department of food research, national nutrition and food technology research institute, shahid beheshti university of medical science, tehran, iran سیدجواد سیدطبایی seyyed javad seyyed tabaei department of medical parasitology and mycology, school of medicine, shahid beheshti university of medical sciences, tehran, iran

purpose: the purpose of this study is to model cryptosporidiosis in laboratory animals. the parasites were inoculated into animalsand thenmultiplied. the process of proliferation was compared to controlcryptosporidiosis in humans. materials and methods: twenty-five laboratory mice (4-7 days of age) and twenty-five laboratory rats (5 days of age) were assigned to the category i while the categor...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهرکرد - دانشکده ادبیات و علوم انسانی 1391

why some learners are willing to communicate in english, concurrently others are not, has been an intensive investigation in l2 education. willingness to communicate (wtc) proposed as initiating to communicate while given a choice has recently played a crucial role in l2 learning. it was hypothesized that wtc would be associated with language learning orientations (llos) as well as social suppo...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده ادبیات و زبانهای خارجی 1392

abstract i the purpose of this study was to launch a thorough investigation concerning the possibility of differing orientations to the writing proficiency construct by native and non-native english speaking teacher raters. it mainly revolved around the international english language testing system (ielts) that is widely administered and employed as a measure of general proficiency in englis...

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