Gizmorama
February 22, 2010
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Good Morning,
The European Space Agency is preparing to launch a satellite
into orbit that will monitor thickness of various ice masses
such as floating ice in the polar oceans. Find out more in
the second article.
Until Next Time,
Erin
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Scientists reverse blood stem cell aging
BOSTON - U.S. scientists say they have reversed the aging
of blood stem cells through the influence of bone-forming
cells known as osteoblasts. Principal Investigator Amy
Wagers of the Joslin Diabetes Center in Boston said aging
leads blood stem cells in bone marrow to produce an aberrant
array of blood cell types that enhances vulnerability to
disease. An earlier study at Joslin by postdoctoral fellow
Shane Mayack revealed bone-forming cells known as osteoblasts
have a critical role in the maintenance and regeneration of
blood stem cells. Wagers said her team found blood factors
from osteoblasts influence the aging of blood stem cells,
making them less able to produce the right mixture of blood
cells. Wagers' team conducted tests in which two mice shared
a common blood circulation. When old mice were paired with
young mice, osteoblasts and existing stem cells of the older
mice showed signs of rejuvenation, so that the older mice
had blood-forming abilities more characteristic of younger
mice. "What's most exciting is that the changes that occur
in blood stem cells during aging are reversible, through
signals carried by the blood itself," Wagers said. "This
means that the blood system offers a potential therapeutic
avenue for age-related stem cell dysfunction."
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ESA to launch ice-monitoring satellite
PARIS - The European Space Agency says its CryoSat-2 sat-
ellite has been sealed in its rocket in preparation for
launch from the Baikonur Cosmodrome in Kazakhstan. The ESA
said the mission -- scheduled for launch Feb. 25 at 8:57 a.m.
EST -- will be dedicated to the precise monitoring of the
variations in the thickness of both floating ice in the polar
oceans and the ice sheets that cover Greenland and Antarc-
tica. "With the effects of a changing climate fast becoming
apparent, particularly in the polar regions, this information
is urgently needed to further our understanding of the com-
plex interactions between ice and climate," the ESA said. One
issue during the launch preparations occurred when a piece of
material from the satellite's X-band science-data trans-
mission antenna was found to have broken off during trans-
port. ESA officials called upon a local surgeon equipped
with an endoscope to resolve the problem. The space agency
said the satellite and its rocket will be moved to the launch
pad next week, where it will be integrated onto the rest of
the launcher. CryoSat-1 was destroyed during its October
2005 launch when the second stage engine of its rocket mal-
functioned.
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Ion trap measures super heavy element
DARMSTADT, Germany - German scientists say they've developed
technology that might allow them to discover and study
heavy, long-lived elements produced with particle acceler-
ators. The physicists at the GSI Helmholtz Center for Heavy
Ion Research in Darmstadt, Germany, said besides the 92
naturally occurring elements, scientists have been able to
create 20 additional chemical elements, six of which were
discovered at the Helmholtz Center. The new elements, all
produced by accelerators, are very short-lived, decaying in
a split second. Now the international team of scientists
headed by Michael Block reports it was able to trap atoms
of the element 102, nobelium, in an ion trap. That, they
said, marked the first time a so-called super heavy element
has been trapped, allowing them to measure the atomic mass
of Nobelium with unprecedented accuracy. "Precisely
measuring the mass of nobelium with our ? device was a
successful first step," said Block. "Now, our goal is to
improve the measuring apparatus so that we can extend our
method to heavier and heavier elements ?" The research that
included scientists from the Max Planck Institute for Nuclear
Physics in Heidelberg, Germany; the German Universities of
Greifswald, Heidelberg, Mainz and, Munich; Italy's Padua
University; the University of Jyvaskyla in Finland; Granada
University in Spain; and the Petersburg Nuclear Physics
Institute and the Joint Institute for Nuclear Research, both
in Russia, is reported in the journal Nature.
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