نتایج جستجو برای: long term metals concentration
تعداد نتایج: 1394329 فیلتر نتایج به سال:
gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...
the influence of long-term mixed organic and inorganic contamination on soil microbial activity, community structure and genetic diversity was investigated in soil samples from a coke oven plant located in upper silesia, poland. the tested soils were heavily contaminated with polycyclic aromatic hydrocarbons (pahs) and heavy metals. the microbial communities were characterized using the phospho...
Long marine sedimentary cores can be effective in paleo-climate reconstruction. The present research aims at analyzing the temporal variation of temperature as an important climate parameter and also variations in metal concentrations (As, Ba, Cd, Li, Mo, Mg, Mn, Na, Pb, Sr, Zn, Fe, Ca, Al) of two long sedimentary cores at the Persian Gulf back to the Holocene. The obtained results revealed th...
a novel silver (ag) nanocomposite electrode was proposed that fabricated from metal nanostructures and ionic liquids. the combined application of unique properties of nanomaterials and ionic liquids in the design of this ag nanocomposite results in electrodes with interesting advantages compared to the conventional metal disk electrode. in the first part of this thesis, the elecrocatalytic eff...
one of the most important issues in groundwater is its contamination by heavy metals. because of chemical stability and poor degradation of heavy metals and their ability to accumulate in living organism’s bodies, they can become toxic. for this, 15 water samples were collected from the groundwater resources of the oshnavieh plain in september 2015 ,with evenly distributed, and then were analyz...
بررسی میزان فلزات (کادمیوم، سرب، روی، مس، کروم، نیکل) در بعضی از انواع سرمه های موجود در بازار ایران
Background and purpose: Exposure to heavy metals can cause neurological, respiratory and cardiovascular disorders, imbalance of hormones, hair loss, infertility, and abortion. Kohl containing heavy metals can lead to such complications due to long-term contact with the lining of the eye. The aim of this study was to investigate the contamination level of Kohl by heavy metals (cadmium, zinc, nic...
چکیده: هدف: هدف از پژوهش حاضر مقایسه حافظه (کوتاه مدت، بلند مدت و بصری) در بیماران مبتلا به دیابت نوع 2 و افراد سالم می باشد. روش: روش پژوهش از نوع علی مقایسه ای است. جامعه آماری این تحقیق را کلیه بیماران مبتلا به دیابت نوع 2 ساکن شهرستان پارس آباد و روستاهای اطراف آن تشکیل می دهند. از بین این جامعه، 40 نفر از بیماران مراجعه کننده به پزشکان متخصصین داخلی و پزشکان خانواده که در شهرستان پارس آبا...
abstract the purpose of this study is twofold: on the one hand, it is intended to see what kind of noticing-the –gap activity (teacher generated vs. learner generated) is more efficient in teaching l2 grammar in classroom language learning. on the other hand, it is an attempt to determine which approach of the noticing-the-gap- activity is more effective in the long- term retention of grammar...
acknowledge the importance of e-commerce to their countries and to survival of their businesses and in creating and encouraging an atmosphere for the wide adoption and success of e-commerce in the long term. the investment for implementing e-commerce in the public sector is one of the areas which is focused in government‘s action plan for cross-disciplinary it development and e-readiness in go...
background & aims of the study: heavy metals are one of the most important environmental pollutants which agricultural and industrial activities and urban development increased their entry rate to the underground resources. this study aimed to investigate the concentration of chromium, nickel and manganese in groundwater resources in asadabad plain. materials & methods: sampling of groundwater ...
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