heavy metal

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heavy metal

a metal with a high specific gravity
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heavy metal

[′hev·ē ′med·əl]
(metallurgy)
A metal whose specific gravity is approximately 5.0 or higher.

heavy metal

References in periodicals archive ?
There are many sources of exposure to toxic heavy metals.
Scientific interest from environmental point of view in essential heavy metals such as Mn, Fe, Cu and Zn is due to the narrow window between their essentiality and toxicity (Yousafzai and Shakoori, 2008).
In an aquatic environment, toxic metals naturally presence at low level, but level of heavy metals have increased caused by anthropogenic pollutants, [1].
Based on existing research, main conclusions of accumulation in soil- crop system are as follows: Different plants have different heavy metal accumulation ability, Different plants have different translocation and accumulation ability to the same heavy metals (Ro Mkens et al.
We found that our bio-oils-functionalized vegetable oils-that were used as lubricants are also good for absorbing heavy metals.
These heavy metals contaminated water can even proved to be harmful and fatal for plants, animals including humans.
Several methods have been explored to mitigate the effects of heavy metals and to control the occurrence and persistence of these substances in the environment.
The accumulation and distribution of heavy metals in the soil have become controversial social issues (Yang, Chen, et al.
My own heavy metals timeline will shed some light on this:
Heavy metal pollutants found in the soil can cause their deleterious effects by one of four ways [3,4]: 1) These heavy metals can undergo redox cycling and in the process lead to oxyradical production which then causes oxidative stress in soil organisms, 2) they can bind directly to sulfhydryl groups of proteins and lead to protein inactivation and denaturation, 3) they can bind to intracellular glutathione (GSH) or antioxidant enzymes (e.
Dynamics and bioavailability of heavy metals in the rootzone.