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News:
- New Research Reveals Oxygen’s Contributions to Evolution
- Large Centrifuge Helps Researchers Mimic Effects of Katrina on Levees
- Sandia’s Z Machine Exceeds Two Billion Degrees Kelvin
- New Sensor Technology Detects Chemical, Biological, Nuclear and Explosive Materials
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Editor's Choice:
- Static and Dynamic Headspace Autosampler
- Orthogonal TOF Mass Spectrometer
- Xylene Extractables and Viscosity Measurements
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New Research Reveals Oxygen’s Contributions To Evolution
It’s common knowledge that humans and other animals couldn’t survive without oxygen.
But scientists are now learning a good deal more about the extent of our evolutionary
debt to a substance that was once a deadly poison.
New research at Lawrence Livermore National Laboratory (LLNL) and Boston University
shows that many of the complex biochemical networks that humans and other advanced
organisms depend on for their existence could not have evolved without oxygen.
“You could call it the ‘oxygen imperative,’ ” said LLNL postdoctoral researcher Jason
Raymond. “It’s clear that you need molecular oxygen to evolve complex life as we know
it.” more>>>
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Large Centrifuge Helps Researchers Mimic Effects of Katrina on Levees
Researchers studying the effects of Hurricane Katrina on the levees of New Orleans used
a 150 g-ton centrifuge to model one of New Orleans' levee sections and the hurricane
forces that led to its failure.
The goal of the test was to learn how layers of peat
and clay beneath the levees might have contributed to the failure.
The centrifuge is part of the National Science Foundation (NSF) George E. Brown, Jr.
Network for Earthquake Engineering Simulation (NEES), an interconnected, nationally
distributed system of 15 facilities for studying the effects of full-scale earthquake
forces on structures and materials. more>>>
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Sandia’s Z Machine Exceeds
Two Billion Degrees Kelvin
Sandia’s Z machine has produced
plasmas that exceed temperatures of 2 billion degrees Kelvin — hotter
than the interiors of stars.
The unexpectedly hot output, if its cause were understood and harnessed,
could eventually mean that smaller, less costly nuclear fusion plants
would produce the same amount of energy as larger plants.
The phenomena also may explain how astrophysical entities like solar
flares maintain their extreme temperatures.
“At first, we were disbelieving,” says Sandia project lead Chris
Deeney. “We repeated the experiment many times to make sure we had
a true result and not an ‘Ooops’!”
The results, recorded by spectrometers and confirmed by computer
models created by John Apruzese and colleagues at Naval Research
Laboratory, have held up over 14 months of additional tests. more>>>
New Sensor Technology Detects Chemical, Biological, Nuclear And Explosive Materials
Engineers at the U.S. Department of Energy's Argonne National Laboratory, using an
emerging sensing technology, have developed a suite of sensors for national security
applications that can quickly and effectively detect chemical, biological, nuclear and
explosive materials.
"We can use this technology to detect chemical and biological agents and also to
determine if a country is using its nuclear reactors to produce material for nuclear
weapons or to track the direction of a chemical or radioactive plume to evacuate an
area," explained Paul Raptis, section manager. Raptis is developing these sensors with
Argonne engineers Sami Gopalsami, Sasan Bakhtiari and Hual-Te Chien.
more>>>
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Static and Dynamic Headspace Autosampler
EST Analytical’s Markelov HS 9000 static and dynamic headspace autosampler features a
dual needle design and horizontal rotary mixing. Sensitivity can be increased up to
100× because the dual needle continually sweeps the headspace for concentration on the
optional adsorbent trap or at the analytical column. more>>> |
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Orthogonal Time-Of-Flight Mass Spectrometer
Waters’ LCT Premier orthogonal time-of-flight mass spectrometer
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Automated Xylene Extractables and Viscosity Measurements
Polymer ChaR’s fully automated CRYSTEX determines the percentage of extractables in
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