نتایج جستجو برای: 1 glit of nutshell carbon and date pit carbon can respectively remove approximately 19

تعداد نتایج: 24442201  

Journal: :environmental health engineering and management 0
ali asghar najafpoor health sciences research center, department of environmental health engineering, school of health, mashhad university of medical sciences, mashhad, iran ghorban soleimani shahid sadoughi university of medical sciences, yazd, iran mohammad hasan ehrampoush environmental health engineering department, shahid sadoughi university of medical sciences, yazd, iran mohammad taghi ghaneian environmental health engineering department, shahid sadoughi university of medical sciences, yazd, iran elham rahmanpour salmani department of environmental health, school of health, mashhad university of medical sciences, mashhad, iran maryam dolatabadi takabi student research committee, department of environmental health, school of health, mashhad university of medical sciences, mashhad, iran

background: the presence of heavy metals in the environment especially in water supplies have caused many concerns because of their toxicity and non-degradability. hexavalent chromium (cr) is one of the most toxic metals which is used in many industries, so it is essential to remove it from industrial wastewater. in this study, we made a comparison between different adsorption isotherms in the ...

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

nowadays enhancing critical thinking in learners is considered one of the foreign language teachers’ tasks due to its high position in foreign language classrooms. when it comes to selecting materials for language classrooms, there are obviously some criteria that teachers should apply. the present study aimed at a critical thinking based analysis of ten picture story books and ten folktales th...

Ahmad Reza Haratinezhad Torbati, Mahshid Loloei, Shidvash Dowlatshahi,

Background: Industrial development has caused the release of various pollutants including heavy metals into the environment. These toxic compounds are extremely dangerous to living beings and the environment due to their non-biodegradability, severe toxicity, carcinogenicity, the ability to be accumulated in nature and the ability to contaminate groundwater and surface water. The aim of the pre...

پایان نامه :0 1392

nowadays in trade and economic issues, prediction is proposed as the most important branch of science. existence of effective variables, caused various sectors of the economic and business executives to prefer having mechanisms which can be used in their decisions. in recent years, several advances have led to various challenges in the science of forecasting. economical managers in various fi...

Journal: :محیط زیست طبیعی 0
هادی پورباقر استادیار گروه شیلات، دانشکدۀ منابع طبیعی، دانشگاه تهران، کرج، ایران سهیل ایگدری استادیار گروه شیلات، دانشکدۀ منابع طبیعی، دانشگاه تهران، کرج، ایران محمد هرسیج استادیار، گروه منابع طبیعی، دانشگاه گنبدکاووس، گنبدکاووس، ایران امیرحسین حمیدیان استادیار گروه محیط زیست ، دانشکدۀ منابع طبیعی، دانشگاه تهران، کرج، ایران

increasing the concentration of ammonia in water can cause fish death. this study was conducted to compare the performance of conditioned activated carbon and zeolite in ammonia (tan = total ammonia nitrogen) removal in a simulated transport of rainbow trout fry in 40-liter plastic bags. hence, responses of zeolite and conditioned activated carbon in ammonia (tan) removal at different concentra...

A. Savari, A.R. Safahieh, M. Hamidian Pour, M. Khaleghi, S. Ghaemmaghami,

The mangrove forest ecosystem is known to possess a variety of ecosystem services, including high rates of carbon sequestration, storage and mitigating climate change through reduced deforestation. This study was carried out in the mangrove forests of Gowatr Bay, Gulf of Oman during 2017-18 to quantify biomass and carbon stocks of all components of this forest, including live and dead trees, so...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی دکتر علی شریعتی 1392

like any other learning activity, translation is a problem solving activity which involves executing parallel cognitive processes. the ability to think about these higher processes, plan, organize, monitor and evaluate the most influential executive cognitive processes is what flavell (1975) called “metacognition” which encompasses raising awareness of mental processes as well as using effectiv...

پایان نامه :0 1375

investigation the archetype of mother can help the reader to understand poes works, especially his fiction, better, if not fully. motivated by internal and external drives to get into the universe in its manifold form poe was impelled to art and, from various modes of art, to symbolism. how much was poe successful to produce works of art has been a matter of dispute among critics. however, ther...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید مدنی آذربایجان - دانشکده زبانهای خارجی 1391

since esp received universal attention to smooth the path for academic studies and productions, a great deal of research and studies have been directed towards this area. swales’ (1990) model of ra introduction move analysis has served a pioneering role of guiding many relevant studies and has proven to be productive in terms of helpful guidelines that are the outcome of voluminous productions ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده ادبیات و زبانهای خارجی 1393

abstract this quasi-experimental study was aimed at examining the impact of storyline complexity on the grammatical accuracy and complexity of advanced and intermediate efl learners. a total of 65 advanced and intermediate efl learners were selected from iran language institute (ili). an intact group including 35 intermediate participants and another intact group with 30 advanced participants ...

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