The National Geographic Magazine, Volume 114National Geographic Society, 1958 - Geography Indexes kept up to date with supplements. |
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Page 325
Rats and Mice Serve Humanity in Radiation and Cancer Studies Man still has gaps in his knowledge of how radiation affects humans . Seeking new clues and leads , he experi- ments with rats and mice , whose reactions in many re- spects ...
Rats and Mice Serve Humanity in Radiation and Cancer Studies Man still has gaps in his knowledge of how radiation affects humans . Seeking new clues and leads , he experi- ments with rats and mice , whose reactions in many re- spects ...
Page 346
By such regular check- ups they make sure there is never enough radiation to endanger animals or humans , either by direct exposure or by eating slightly contaminated crops and other food . Safety specialists feel their responsibility ...
By such regular check- ups they make sure there is never enough radiation to endanger animals or humans , either by direct exposure or by eating slightly contaminated crops and other food . Safety specialists feel their responsibility ...
Page 349
Radioactive materials also differ greatly in their half life , the amount of time required for half the atoms to dissipate their radiation . Some substances have a half life of seconds , others of hours , days , weeks , or hundreds of ...
Radioactive materials also differ greatly in their half life , the amount of time required for half the atoms to dissipate their radiation . Some substances have a half life of seconds , others of hours , days , weeks , or hundreds of ...
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Contents
Poseidons Playground Sailing in Grecian waters sprinkled with | 403 |
New Atlas Map Links Roman and Atomic Times in the British Isles Text | 408 |
Vibrant Heart of France 15 illustrations with full legends twopage map 285 | 415 |
Copyright | |
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