High CO2 levels can hurt soybean plants
Tuesday, February 3rd, 2009Gizmorama -
“The Cutting Edge of Science Fact and Science Possibilities”
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Now on with todays’ Gizmorama….
Until Tomorrow,
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NASA seeks gravity flight test proposals
The U.S. space agency is seeking new technologies that
could benefit from testing during flights on an airplane
that simulates the weightless of space. The National
Aeronautics and Space Administration said such techno-
logies might improve air and space vehicle capabilities
and support future systems used in space exploration.
“To prepare technologies for space applications, it is
important to demonstrate they work in a zero-gravity
environment,” NASA said. “This unique testing environ-
ment can be provided in an aircraft flying repeated
parabolic trajectories which create brief periods of
zero gravity. The aircraft also can simulate reduced-
gravity levels similar to those found on the surface
of the moon or Mars.” The testing opportunities are be-
ing offered to U.S. companies, individuals, academic or
research institutions and government agencies. NASA
said it will provide free flight time for the tests,
while project teams will be responsible for all other
expenses. Proposals are due by March 20. Flights to
demonstrate the technologies will be conducted during
August from Ellington Field in Houston. NASA expects
to select at least 20 projects for this round of test
flights, pending availability of funding.
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High CO2 levels can hurt soybean plants
U.S. biologists have discovered high atmospheric carbon
dioxide levels negatively affect a soybean plant’s
defenses against leaf-eating insects. Professor Evan
DeLucia and colleagues at the University of Illinois
said deforestation and the burning of fossil fuels have
significantly increased carbon dioxide levels since the
late 18th century. “Currently, CO2 in the atmosphere is
about 380 parts per million,” DeLucia, an author of the
study, said, and it’s predicted to reach 550 parts per
million by the year 2050. The study, led by Professor
May Berenbaum, used the Soybean Free Air Concentration
Enrichment facility at Illinois, which can expose the
plants in a soybean field to a variety of atmospheric
CO2 and ozone levels. The researchers said they wanted
to know how high CO2 levels affects the insects that
feed on the plants. They found soybeans exposed to high-
er levels of CO2 exhibited more signs of insect damage
than those in nearby plots, attracting many more
Japanese beetles, Western corn rootworms and Asian soy-
bean aphids than soybeans in other plots. The scientists
also discovered beetles on the high CO2 soybean plants
lived longer, producing more offspring, than those out-
side the test plot. The research appeared in the online
edition of the Proceedings of the National Academy of
Science.
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Study: Statins needed to fight cholesterol
Drugs called statins that can help lower an individual’s
cholesterol levels are needed by up to 11 million older
U.S. residents, a new study suggests. Yale University
researcher Dr. Erica Spatz said her JUPITER study of
18,000 people found that older individuals said to have
normal low-density lipoprotein levels should be taking
statins to significantly reduce their risk of a stroke
or heart attack, USA Today said Monday. If Spatz’s chol-
esterol warning were heeded by those millions of U.S.
residents, an estimated 80 percent of U.S. women above
the age of 60 and U.S. men over the age of 50 would be
taking the medication. A study by researcher Dr. Gregg
Fonarow of University of California-Los Angeles rein-
forced that recommendation. Fonarow found by studying
131,000 heart disease-related hospital admissions that
current doctor-recommended LDL levels are unacceptable.
The UCLA researcher said half of the heart attacks he
studied occurred in individuals whose LDL levels were
safely below the level that doctors typically begin
prescribing statins, USA Today reported.