نتایج جستجو برای: natural toxicity

تعداد نتایج: 594528  

ژورنال: علوم آب و خاک 2006
رقیه حاجی بلند, , محمد کریم خسرو پناه, ,

Manganese toxicity occurs in many agricultural and natural ecosystems under the various soil conditions such as the nature of substrate, acidity, flooding or vicinity to the mining areas. The objective of this work was to study the effects of excess Mn in the growth medium on three important crop species, namely rice (Oryza sativa L. cv. T. Hashemi), maize (Zea mays L. cv. SC.704) and sunflower...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

abstract the influence of cation?? and anion?? interactions on the strength and nature of n…h hydrogen bond has been investigated by quantum chemical calculations in s-triazine…3hf complex. ab initio calculations were performed at mp2/6-311++g(d,p) level of theory. the natural bond orbital (nbo) analysis and the bader’s quantum theory of atoms in molecules (aim) were also used to elucidate t...

Journal: :Environmental science & technology 2013
Clement Levard Ernest M Hotze Benjamin P Colman Amy L Dale Lisa Truong X Y Yang Audrey J Bone Gordon E Brown Robert L Tanguay Richard T Di Giulio Emily S Bernhardt Joel N Meyer Mark R Wiesner Gregory V Lowry

Nanomaterials are highly dynamic in biological and environmental media. A critical need for advancing environmental health and safety research for nanomaterials is to identify physical and chemical transformations that affect the nanomaterial properties and their toxicity. Silver nanoparticles, one of the most toxic and well-studied nanomaterials, readily react with sulfide to form Ag(0)/Ag2S c...

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