man-made elements

man-made elements:

see synthetic elementssynthetic 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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References in periodicals archive ?
The facilities in both cases were underground structures that combine man-made elements with the ground itself for use in the oil and gas industry.
In The Design of Childhood: How the Material World Shapes Independent Kids (Bloomsbury Publishing), design critic Alexandra Lange investigates the man-made elements of children's landscapes that shape their youth.
Pieces such as Oribe Futamono #11, in which the corner of a cube emerges from an organic mass of clay, and Oribe Vase # 23, a conglomeration of a thrown bowl and shards of clay, have clear incorporated man-made elements. These elements do two things.
"I looked at man-made elements including concrete and rust patterns, chipped paint and tyre tracks on mud to come up with my pattern," said Chloe.
The inspection matrix for the landscape inventory included sections of the existing plant species, condition of man-made elements, architectural coherence, established presence of wildlife, land management, function and landscape components.
These natural and man-made elements appear to be regulated - in perfectly harmonious interaction - by the clockwork gears.
1926) is renowned for her kinetic metal sculptures activated by nature's elements, such as wind and water (aquamobiles), and man-made elements such as magnets (magnetmobiles) and motors.
Within this landscaping system, natural and man-made elements are structured in a balanced and sustainable symbiosis.
Washington, December 15 (ANI): A scientist has put forward a new hypothesis regarding the rapid retreat of Himalayan glaciers in recent decades, attributing the phenomenon to natural elements like the geography and man-made elements like dust and soot.
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.