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radioactive waste,material containing the unusable radioactive byproducts of the scientific, military, and industrial applications of nuclear energy.

Since its radioactivity presents a serious health hazard (see radiation sickness), disposing of such material is a great problem......

radiation sickness,harmful effect produced on body tissues by exposure to radioactive substances.

The biological action of radiation is not fully understood, but it is believed that a disturbance in cellular activity results from the chemical changes caused by ionization (see.....

Under very hot temperatures — greater than 100,000,000 Kelvin (179,999,540.6 F) — the helium nuclei begin to fuse, first as pairs into unstable 4-proton beryllium nuclei, and eventually, as enough beryllium nuclei blink into existence, into a beryllium plus a helium.

The end result: Atoms with six protons and six neutrons — carbon.

Carbon occurs extensively in all living organisms as proteins, fats, carbohydrates (sugars and starches), and nucleic acids.

Humans have been aware of carbon since the earliest of times. The black color of smoke is caused by unburned specks of carbon.

Buckyball carbon holds the promise for opening a whole new field of chemistry (see accompanying sidebar).In this interactive, learn how radiocarbon dating works, what it takes to determine a date in the lab, and why it's challenging to pinpoint a date precisely.­You've probably heard people talk about radiation both in fiction and in real life.At Three Mile Island and Chernobyl, nuclear power plants released radioactive substances into the atmosphere during nuclear accidents.And in the aftermath of the March 2011 earthquake and tsunami that struck Japan, a nuclear crisis raised fears about radiation and questions about the safety of nuclear power.

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I planned and coordinated all parts of development-phase projects from preclinical to commercial launch.