Gizmorama
April 5, 2010
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Good Morning,
In the middle segment of this newsletter is a very inter-
esting article about common toads being able to predict
earthquakes. Read more details on this discovery, made by
British scientists, in the article.
Until Next Time,
Erin
Questions? Comments? Email me at: mailto:gizmo@gophercentral.com
Email your comments=
P.S. You can discuss this issue or any other topic in the new
Gizmorama forum. Check it out here...
http://gizmorama.gophercentral.com
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NASA observes key ocean circulation system
PASADENA, Calif. - NASA says new data show the Atlantic
Meridional Overturning Circulation -- part of what's know as
the global ocean conveyor belt -- may have sped up recently.
The information was gleaned from a new monitoring program
developed by Josh Willis of NASA's Jet Propulsion Laboratory
in Pasadena, Calif., which includes measurements from satel-
lites and an array of approximately 3,000 robotic floats
supported in part by the National Oceanic and Atmospheric
Administration. The floats measure temperature, salinity and
velocity across the world's oceans. "The Atlantic overturning
circulation is a system of currents, including the Gulf
Stream, that bring warm surface waters from the tropics
northward into the North Atlantic," NASA said. "There, in
the seas surrounding Greenland, the water cools, sinks to
great depths and changes direction. What was once warm sur-
face water heading north turns into cold deep water going
south. This overturning is one part of the vast conveyor
belt of ocean currents that move heat around the globe."
Scientists said without the heat carried by that system,
the North Atlantic climate -- in Europe, North America and
North Africa -- would likely be much colder. "Nobody imagined
that this large-scale circulation could be captured by these
global observing systems," Willis said. "Their amazing pre-
cision allows us to detect subtle changes in the ocean that
could have big impacts on climate."
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Nanoscale cell 'stealth' probe is created
STANFORD, Calif. - U.S. nanotechnology engineers say they
have created a nanoscale probe that can slide through a cell
wall without damaging it and fuse with the membrane. Stanford
University researchers said their probe offers scientists a
portal for extended eavesdropping on the inner electrical
activity of individual cells. Everything from signals gener-
ated as cells communicate with each other to "digestive
rumblings" as cells react to medication could be monitored
for up to a week, the engineers said. Current methods of
probing a cell are destructive and usually allow a few hours
of observation before the cell dies. The researchers said
they are the first to implant an inorganic device into a
cell wall without damaging it. Assistant Professor Nick
Melosh, who led the study, said with modification the probe
might also serve as a conduit for inserting medication into
a cell's heavily defended interior and also provides an
improved method of attaching neural prosthetics, such as
artificial arms that are controlled by pectoral muscles, or
deep brain implants used for treating depression. The 600-
nanometer-long, metal-coated silicon probe has integrated so
smoothly into membranes in the laboratory the researchers
call it a "stealth" probe. "The probes fuse into the mem-
branes spontaneously and form good, strong junctions there,"
Melosh said. "We cannot pull them out. The membrane will
just keep deforming rather than let go of the probes."
Melosh and graduate student Benjamin Almquist report their
accomplishment in the Proceedings of the National Academy
of Sciences.
Study: Toads can predict earthquakes
MILTON KEYNES, England - British scientists say they've dis-
covered common toads can detect impending earthquakes, some-
times days in advance of any apparent seismic activity.
Researchers from The Open University said they found 96
percent of male toads (Bufo bufo) in a population abandoned
their breeding site five days before an earthquake struck
L'Aquila in Italy last year. The breeding site was located
about 45 miles from the earthquake's epicenter. The scien-
tists said the number of paired toads at the site also
dropped to zero three days before the earthquake. "Our study
is one of the first to document animal behavior before,
during and after an earthquake," the study's lead author,
Rachel Grant, said. "Our findings suggest that toads are
able to detect pre-seismic cues, such as the release of
gases and charged particles, and use these as a form of
earthquake early warning system." The research is reported
in the Zoological Society of London's Journal of Zoology.
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Gene boosts tomato yield and sweetness
COLD SPRING HARBOR, N.Y. - U.S. and Israeli scientists say
they have identified a gene that causes hybrid tomato plants
to substantially increase yield, and also increases sweet-
ness. Cold Spring Harbor Laboratory and Hebrew University
researchers said the gene controls when the plants make
flowers, works in different varieties of tomato, and cru-
cially, across a range of environmental conditions. "This
discovery has potential to have a significant impact on both
the billion-dollar tomato industry, as well as agricultural
practices designed to get the most yield from other flowering
crops," said Cold Spring Harbor Laboratory scientist Zach
Lippman, one of the three authors of the study. By screening
a "mutant library" of 5,000 different tomato varieties, the
scientists said they found a mutation in one copy of a gene
called SFT increases tomato fruit yield by up to 60 percent.
The study suggests improved vigor in plants can result from
single heterozygous mutations, an idea the researchers said
has great implications for plant breeding. "Mutant plants
are usually thrown away because of the notion that mutations
would have negative effects on growth," Lippman said. "Our
results indicate that breeding with hybrid mutations could
prove to be a powerful new way to increase yields, not only
in tomato, but all crops." The study is reported in the
early online edition of the journal Nature Genetics.
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