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man-made elements

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man-made elements: see synthetic elements synthetic elements, in chemistry, radioactive elements that were not discovered occurring in nature but as artificially produced isotopes. They are technetium (at. no. 43), which was the first element to be synthesized, promethium (at. no. 61), astatine (at. no.
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The contributors, a good mix of academics and industrial experts, cover natural toxicants such as pyrrolizidine alkaloids, glucosinolates, phycotoxins in seafood, mushroom toxins (including edible and toxic mushrooms), mycotoxins, phytoestrogens and beta-carboline alkaloids as well-as man-made elements such as nitrates and nitrites, acrylamide in heated foods, furan, chloropropanols and their fatty acid esters, hetrocyclic amines and polycyclic aromatic hydrocarbons.
Bioactive compounds in foods by SciTech Book News
[ILLUSTRATION OMITTED] We learn about many aspects of the timber industry from the natural world (N for Nursery trees nestle near natural seedlings) to the man-made elements (T for Timber cruisers tally trees).
Forestry A-Z by Cree, Mary Anne / Canadian Children's Book News
The beautiful wood adds character and elegance to your outdoor design through a blending of nature and man-made elements which provide an outstanding aesthetic presentation to any yard.
Teak the Favorite Outdoor Furniture by Laurence Clunie / Home based business community
 
 
 
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