نتایج جستجو برای: arsenic and chromium were analyzed by atomic absorption

تعداد نتایج: 17818753  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده مهندسی صنایع 1387

according to webster and wind (1972) and anderson et al (1987), “organizational buying is a complex process and involves many people from different functional areas, multiple goals and potentially conflicting decision criteria. moreover, the customers of today are also more knowledgeable and selective when making their purchasing decisions. since a key to organizational survival is the retentio...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اراک - دانشکده علوم انسانی 1393

this research study aimed to investigate the relationship between field-dependence/independence cognitive style and vocabulary learning strategies among iranian efl learners. ninety participants majoring in english translation at arak university were chosen. the participants were classified into two groups of field-dependent and independent based on the results of group embedded figure test (ge...

Mohammad Fahim , Namdar Yousofvand,

Background: In the present study, histopathological effects of chronic exposure to sodium arsenate in drinkable water were studied on a quantity of organs of rat. Methods: Rats were divided into two groups, group I served as control group, were main-tained on deionized drinkable water for 2 months, and group II the study group were given 60 g/ml of sodium arsenate in deionized drinkable wa...

Journal: :global journal of environmental science and management 0
v. pelitli scientific and technological research council, marmara research center, environment and cleaner production institute gebze/kocaeli, turkey ö. doğan scientific and technological research council, marmara research center, environment and cleaner production institute gebze/kocaeli, turkey h.j. köroğlu scientific and technological research council, marmara research center, chemical technology institute gebze/kocaeli, turkey

in accordance with waste strategy for turkey, the study was carried out to analyses waste engine crankcase oils and waste gearbox oils generated from vehicle maintenance services in order to determine their suitability for recycling, recovery or final disposal based on regulation published by turkish ministry of environment and forestry on 21 january 2004. the regulation requires all waste oil ...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده زبانهای خارجی 1390

acknowledgements i wish to express my gratitude to all those who have helped me in preparing this thesis. i would like to express my deep gratitude to my respected advisor dr. kourosh akef, whose advice and comments helped me in the early stages of the research and throughout the writing process. i would also like to express my gratitude to dr. hajar khanmohammad whose invaluable guidance he...

Journal: :iranian journal of environmental sciences 0
fahad ahmed department of environmental sciences, jahangirnagar university, dhaka-1342, bangladesh md. shakhaoat hossain department of public health & informatics, jahangirnagar university, dhaka-1342, bangladesh abu tareq abdullah institute of food science & technology (ifst), bangladesh council of scientific and industrial research (bcsir), dhaka 1205, bangladesh md. ahedul akbor analytical research division, bangladesh council of scientific and industrial research (bcsir), dhaka 1205, bangladesh md. aminul ahsan analytical research division, bangladesh council of scientific and industrial research (bcsir), dhaka 1205, bangladesh

there are many potential risks to human health from heavy metal contamination of vegetables resulting from wastewater irrigated sites. this study was carried out to assess the concentration of chromium (cr) and the risk to human health by chromium through the intake of locally grown vegetables collected from wastewater irrigated agricultural fields. twenty-seven samples of 9 (nine) different ty...

Journal: :international journal of marine science and engineering 2013
a. mashinchianmoradi m. pirouznezhad

the present study was carried out in 2011 to measure concentration of heavy metals chromium and tin in liver and muscle tissue of liza aurata (golden grey mullet) in estuaries of the rivers babolroud, tajan and gorganroud. accordingly, after sampling the target are asandisolating muscle (18samples) and liver (18samples) tissues, they were digested and analyzed using graphite furnace atomic abso...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور مرکز - دانشکده شیمی 1391

dendrimer synthesis strategies now provide virtual control of macromolecular nanostructures as a function of size and surface/interior functionality. these strategies involve the covalent assembly of hierarchical components reactive monomers , branch cells or dendron’s around atomic or molecular cores according to divergent/convergent dendrite branching principles.combinon of two or more dendri...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم انسانی 1385

the present study was carried on to investigate the use of face-keeping strategies in reaction to complaints by male and female in two different cultures, persian and american english. to see if apology strategies are affected by cultural, contextual preferences and gender of interlocutors in two distinct languages of persian and american english. the hypotheses to be tested were 1) ifids, acce...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه مازندران - دانشکده علوم انسانی 1390

iv abstract this study examined the linguistic behaviors of two iranian efl teachers each of them teaching learners of two similar proficiency levels, a beginner level and an intermediate level, to investigate the relationship between the learners proficiency levels and the amounts and purposes for l1 use by the two teachers. the study was carried out to investigate whether there were differe...

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