Word: ultraviolet
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Dates: during 1940-1949
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...cancer cells differ from normal ones. In cancer, normal cells suddenly turn aggressive and invade normal tissues like voracious animals. Cancer experts know that cancers can be induced by certain chemicals, by hormones, by X rays, by nuclear radiation, by metal dusts, tobacco, or even the sun's ultraviolet rays...
...which bombard the earth. Apparently they shoot through an enormous region 50,000 times as wide as the diameter of the sun (865,000 miles). They may be attracted mainly by the powerful gravitation of massive Antares. But they show up on Astronomer Struve's spectroscope because intense ultraviolet rays from the hot, blue Companion make them glow with telltale light...
...problem is the effect of the moon's shadow on the ionized layers in the earth's upper atmosphere. These layers have a profound influence on radio transmission: they bounce some radio waves back and allow others to pass through. Since the ionized layers are caused by ultraviolet light from the sun, they presumably change their character when the moon's shadow knocks a hole in the sun's radiation. Long before the eclipse, begins, the scientists will have radar-like radios of various wavelengths trained upon each layer...
Keloids. The most mysterious delayed effect was a peculiar kind of scar that formed on the skin of burned survivors. Many months after their burns (from The Bomb's terrific heat and ultraviolet radiation) had healed, victims still had raised, flat patches of thick scar tissue, sometimes covering the whole face or back. These scars'("keloids"), ranging in color from pink to brown, were often extremely sensitive to the touch...
From that moment, she entered a strange, new, hermetic world, beguiling, hypnotic and gently self-destructive. Thenceforth she would be bombarded by the ultraviolet and infrared rays peculiar to Hollywood, and the anthropophagous attentions most peculiar of all to MGM. She might imagine M-G-M saying, like the doctor in James Thurber's cartoon: You're not my patient, Miss Kerr, you're my meat...