نتایج جستجو برای: chemical analysis farm product for determining cancinogen metals concentration 4

تعداد نتایج: 12032232  

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

abstract in first part of this project, the use of a new and biguanid-like catalyst supported on silica as a recyclable catalyst provides a new route for the synthesis of a variety of arylalkylidene rhodanine derivatives through knoevenagle reaction in at present of solvent at room temperature. rhodanine derivatives and especially arylalkylidene rhodanines have proven to be attractive compound...

رجایی, قاسم, جهانتیغ, حمید, حسن پور, مهدی, حصاری مطلق, سمانه, میر, عاطفه ,

Background and purpose: For environmental protection, public health, and pollution control, we must have precise information about the extent of pollutants, especially, heavy metals in water environments. Having high stability, heavy metals can produce danger in living organisms. Therefore, the present research was conducted to assess the Concentration of heavy metals and compare the findings w...

2011
H. R. AHMAD A. GHAFOOR D. L. CORWIN M. A. AZIZ

Irrigation with untreated effluent in periurban agriculture could result in accumulation and bioconcentrations of cadmium (Cd) and lead (Pb). Different amendments were used to investigate their effect on availability, concentration, and uptake of metals by wheat in texturally different soils. Crop was irrigated with water containing Cd and Pb at 20 mg L−1, thereby adding 260 mg pot−1 of each me...

Ebrahim Karamian Hassan Gheisari,

Most of the materials used in the industry of aero-engine components generally consist of titanium alloys. Advanced materials, because of their excellent combination of high specific strength, light weight and general corrosion resistance. In fact, chemical wear resistance of aero-engine alloy provides a serious challenge for cutting tool material during the machining process. The reduction in ...

Journal: :محیط زیست طبیعی 0
مریم حیات الغیب کارشناسی ارشد رشتة زمین شناسی محیط زیست افشین قشلاقی استادیار دانشکدة علوم زمین، دانشگاه شاهرود هادی جعفری استادیار دانشکده علوم زمین، دانشگاه شاهرود گیتی فرقانی تهرانی استادیار دانشکدة علوم زمین، دانشگاه شاهرود

the main purpose of this research is to evaluate the hydrochemical properties, con-trolling processes and metal concentrations in kaka-reza river water (lorestan province). to this end, 15 water samples were collected and physicochemical prop-erties (ph-ec), cation-anion contents along with concentrations of some heavy metals were determined using the standard analytical methods. the results re...

Ebrahim Karamian Hassan Gheisari,

Most of the materials used in the industry of aero-engine components generally consist of titanium alloys. Advanced materials, because of their excellent combination of high specific strength, light weight and general corrosion resistance. In fact, chemical wear resistance of aero-engine alloy provides a serious challenge for cutting tool material during the machining process. The reduction in ...

Journal: :آب و خاک 0
محمود دیانی مهدی نادری جهانگرد محمدی

abstract mine excavation, concentration and transportation of minerals make southern esfahan municipality and suburb of sepahanshahr vulnerable to pollution and endanger their people by heavy metals. nowadays, spectrophotometers and spectral reflectance of soils in different parts of spectrum are applied for estimating soil characteristics and pollutants. this research was conducted to study th...

2004
M. L. Carvalho J. G. Ferreira P. Amorim M. T. Ramos

Fucus vesiculosus L. seaweeds from three estuarine stations were analysed by X-ray fluorescence, providing results for the concentration of total In order to study the differential accumulation of heavy metals by different parts of Fucus, four different structures of the algae, base, stipe reproductive organs and growing tips, were analysed. Some elements (e.g. Cu and Fe) are preferentially acc...

2013
Anju A. Kumar

Heavy metal pollution is of particular concern as they have deleterious effects on biota through mobilization and accumulation in various trophic levels. The present study mainly focused on the water pollution by heavy metals in Cochin estuary and two adjoining rivers. The methods include seasonal collection of surface water from the study area and their subsequent heavy metal analysis. The stu...

2007
E. O. Farombi O. A. Adelowo Y. R. Ajimoko

Levels of Zn, Cu, Cd, As, and Pb in the kidney, Liver, Gills and Heart of African cat fish (Clarias gariepinus) from the Ogun River in Ogun State located close to six major industries in the South Western part of Nigeria, were determined using Bulk Scientific Atomic Absorption Spectrophotometer. Fishes were also collected from Government owned fish farm in Agodi, Ibadan which was considered a r...

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