SETI bioastro: Fw: Cold War Weapons Testing Increased Human DNA Mutation Rate

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From: LARRY KLAES (ljk4@msn.com)
Date: Wed Feb 13 2002 - 09:39:42 PST


----- Original Message -----
From: ScientificAmerican.com
Sent: Tuesday, February 12, 2002 4:09 AM
To: ljk4@msn.com
Subject: Cold War Weapons Testing Increased Human DNA Mutation Rate

________________________________________________________________
ScientificAmerican.com -- WEEKLY REVIEW February 12, 2002
________________________________________________________________

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IN THIS ISSUE
-------------------------
** COLD WAR WEAPONS TESTING INCREASED HUMAN DNA MUTATION RATE
** SCIENTISTS CREATE CARBON NANOTHERMOMETER
** STUDY LINKS USE OF TANNING LAMPS TO INCREASED RISK OF SKIN CANCER
** A NEW REPORT EXPLAINS THE PHYSICS OF CRUMPLED PAPER
** RISING CO2 LEVELS COULD FORCE SHIFT IN FERTILIZER USE

Also...ASK THE EXPERTS
** HOW DO YOU GET LARYNGITIS?
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-------------------------- WEEKLY REVIEW ---------------------------
** COLD WAR WEAPONS TESTING INCREASED HUMAN DNA MUTATION RATE
The Cold War ended more than a decade ago, but scientists continue to
assess its effects. From 1949 to 1956, a series of aboveground Soviet
atomic tests at the Semipalatinsk nuclear facility in Kazakhstan
exposed the local population to ionizing radiation. Now, some 40 years
later, researchers have discovered a significant increase in the
genetic mutation rates of several generations of families that
lived nearby.
http://sciam.rsc03.net/servlet/cc?lJpDUWEsqrXFtlgDJhtE0EXVT

** SCIENTISTS CREATE CARBON NANOTHERMOMETER
Scientists continue to create new uses for carbon nanotubes, tiny
cylinders comprised of pure carbon. A new paper describes a
thermometer made out of a column of carbon just 10 micrometers long.
The nanodevice can measure temperatures between 50 and 500 degrees
Celsius and "should be suitable for use in a wide variety
of microenvironments."
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** STUDY LINKS USE OF TANNING LAMPS TO INCREASED RISK OF SKIN CANCER
Each year millions of Americans visit tanning salons in search of that
"healthy glow." But if you think tanning beds are safe alternatives to
sunbathing, think again. The results of a new study suggest that
people who use these devices may have an increased risk of developing
skin cancers.
http://sciam.rsc03.net/servlet/cc?lJpDUWEsqrXFtlgDJhtE0EXVW

** A NEW REPORT EXPLAINS THE PHYSICS OF CRUMPLED PAPER
Crumpling a sheet of paper seems simple enough and certainly doesn't
require much effort, but explaining why the resulting crinkled ball
behaves the way it does is another matter entirely. Once scrunched,
a paper ball is more than 75 percent air yet displays surprising
strength and resists further compression, a fact that has confounded
physicists. A new report, though, describes one aspect of the
behavior of crumpled sheets: how their size changes in relation to the
force they withstand.
http://sciam.rsc03.net/servlet/cc?lJpDUWEsqrXFtlgDJhtE0EXVX

** RISING CO2 LEVELS COULD FORCE SHIFT IN FERTILIZER USE
Over the past two centuries, atmospheric carbon dioxide concentrations
have risen by nearly 30 percent. Global warming concerns aside,
scientists long thought the trend would benefit plants, which use CO2
to manufacture the chemical energy they need. But in recent years,
research has shown that it's not quite that simple. For one thing, it
appears that although plants initially process the additional CO2,
the accelerated assimilation declines after a few days or weeks.
New research sheds light on why this happens.
http://sciam.rsc03.net/servlet/cc?lJpDUWEsqrXFtlgDJhtE0EXVY

ASK THE EXPERTS
====================================================
HOW DO YOU GET LARYNGITIS?
Scientific American spoke with Rebecca N. Gaughan, an ears, nose
and throat doctor in private practice in Olathe, Kansas to learn
the answer.
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====================================================

AND REMEMBER...
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