Lifeboat Foundation: Safeguarding Humanity
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Category: chemistry – Page 361


The New York Times reports that Jeffrey Martin and William L. Kubic Jr., two scientists from Los Alamos National Laboratories are proposing a process by which the carbon dioxide — the primary greenhouse gas considered responsible for contributing to global warming — emitted from cars and other polluters would be captured and converted to gasoline, methane and jet fuel.

The bold proposal, which the duo have named “Green Freedom” would create a closed cycle from the emission of greenhouse gasses resulting in the creation of a vast source of renewable energy where today we have an open ended cycle that is considered a global threat.

They say the science is relatively simple and straight forward. Polluted air would be blown over potassium carbonate which would sequester the CO2, a chemical process would then remove the trapped CO2 and via a number of established chemical processes it would then be converted to various types of fuel.

Although the process has not been demonstrated and no prototypes have been built the pair claims that the required steps or other chemical processes that they say are close cousins to those required are already in use. In addition, none of the processes violate any known laws of physics and a number of other top researchers have independently made similar suggestions for the sequestration and reuse of emitted CO2.

This concept is not without its share of controversy and detractors however. With claims of everything from the fact that the economics of the process make it unfeasible to concerns that it will encourage further over–population and sprawl not to mention the worry that proliferation of nuclear power brings with it, it is nevertheless an interesting concept and proves — if nothing else — that through continued investment in breakthrough technologies we can overcome all challenges be they environmental or societal.

Today, the University of Colorado at Boulder made an announcement regarding a very promising technology:

Known as optical frequency comb spectroscopy, the technique is powerful enough to sort through all the molecules in human breath and sensitive enough to distinguish rare molecules that may be biomarkers for specific diseases

Combined with other rapid-response technologies, this could be part of the detection side of a BioShield, a technological immune system for humanity.

The optical frequency comb is a very precise laser for measuring different colors, or frequencies, of light, said Ye. Each comb line, or “tooth,” is tuned to a distinct frequency of a particular molecule’s vibration or rotation, and the entire comb covers a broad spectral range — much like a rainbow of colors — that can identify thousands of different molecules.

Source: University of Colorado at Boulder

Many of you have recently read that a research team at the University of Illinois led by Min-Feng Yu has developed a process to grow nanowires of unlimited length. The same process also allows for the construction of complex, three-dimensional nanoscale structures. If this is news to you, please refer to the links below.

It’s easy to let this news item slip past before its implications have a chance to sink in.

Professor Yu and his team have shown us a glimpse of how to make nanowire based materials that will, once the technology is developed more fully, allow for at least two very significant enhancements in materials science.

1. Nanowires that will be as long as we want them to be. The only limitations that seem to be indicated are the size of the “ink” reservoir and the size of spool that the nanowires are wound on. Scale up the ink supply and the scale up size of the spool and we’ll soon be making cables and fabric. Make the cables long enough and braid enough of them them together and the Space Elevator Games may become even more exciting to watch.

2. It should also lend itself very nicely to 3D printing of complex nanoscale structures. Actually building components that will allow for the bootstrapping of a desktop sized molecular manufacturing fab seems like it’s a lot closer than it was just a short time ago.

All of this highlights the need to more richly fund the Lifeboat Foundation in general and the Lifeboat Foundation’s NanoShield program in particular so that truly transformative technologies like these can be brought to market in a way that minimizes the risks of their powers being used for ill.

If you can, please consider donating to the Lifeboat Foundation. Every dollar helps us to safely bring a better world into being. The species you help save may be your own.

References:
http://www.news.uiuc.edu/news/08/0130nanofiber.html
http://www.sciencedaily.com/releases/2008/01/080130101732.htm
http://www3.interscience.wiley.com/cgi-bin/fulltext/117901964/PDFSTART

Via the Global Security Newswire:

WASHINGTON — The United Kingdom announced today that it had finished destroying thousands of decades-old chemical weapons (see GSN, June 6, 2002).

The elimination of the last known “legacy” munitions containing agents such as sulfur mustard and phosgene is in keeping with the nation’s obligations under the Chemical Weapon Convention, a Defense Ministry spokesman said.

The British military began using chemical weapons in World War I, and maintained an offensive program until 1956. The Porton Down research facility was already regularly destroying weapons when the treaty entered into force in the United Kingdom in 1997. A total of 7,000 munitions have been destroyed since 1989, with work ending on March 7.

The 3,812 weapons eliminated at Porton Down over the last decade were recovered individually or in small numbers from existing or former military sites. Most dated from 1939 to 1945, The Herald newspaper reported. The artillery and mortar shells were “rusty, old, they couldn’t be used,” the Defense Ministry spokesman said.

Some weapons were drained of agent and then incinerated, while others were detonated if they were found not to contain any dangerous substances. The entire project cost nearly $20 million.

Though chemical weapons are not really an existential threat today, when combined with nanotechnological delivery vectors they could become effective across incredible ranges. Relinquishment of chemical weapons is also proof that nations are willing to give up a class of weapons when it is this inhumane.

From ScienceDaily.com:

Using lasers and tuning forks, researchers at Pacific Northwest National Laboratory have developed a chemical weapon agent sensing technique that promises to meet or exceed current and emerging defense and homeland security chemical detection requirements. The technique, called Quartz Laser Photo-Acoustic Sensing, or “QPAS,” is now ready for prototyping and field testing.

PNNL, a Department of Energy national laboratory, has demonstrated QPAS’s ability to detect gaseous nerve agent surrogates. In one test, researchers used diisopropyl methyl phosphonate (DIMP), which is a chemical compound that’s similar to sarin. QPAS detected DIMP at the sub-part-per-billion level in less than one minute. The miniscule level is similar to letting one drop of liquid DIMP evaporate into a volume of air that would fill more than two Olympic-size swimming pools.

“QPAS is an extremely sensitive and selective chemical detection technique that can be miniaturized and yet is still practical to operate in field environments,” said Michael Wojcik, a research scientist at PNNL. “The laser, tuning fork and other technology needed for QPAS are so simple, and yet robust, that further development is a low-risk investment, and we’re eager to take it to the next level.”

The instrument is based on Laser Photo-Acoustic Sensing, or LPAS, and infrared Quantum Cascade Lasers, or QCLs. LPAS is an exquisitely sensitive form of optical absorption spectroscopy, where a pulsed laser beam creates a brief absorption in a sample gas, which in turn creates a very small acoustic signal. A miniature quartz tuning fork acts as a “microphone” to record the resulting sound wave.

It would probably be a good idea to have these installed all over major cities. Such an action would radically improve the government’s ability to quickly respond to a chemical disaster.