How To Turn Seawater Into Jet Fuel

Turning water into jet fuel (Image: Stocktrek Images/Getty)

From New Scientist:

Faced with global warming and potential oil shortages, the US navy is experimenting with making jet fuel from seawater.

Navy chemists have processed seawater into unsaturated short-chain hydrocarbons that with further refining could be made into kerosene-based jet fuel. But they will have to find a clean energy source to power the reactions if the end product is to be carbon neutral.

The process involves extracting carbon dioxide dissolved in the water and combining it with hydrogen – obtained by splitting water molecules using electricity – to make a hydrocarbon fuel.

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My Comment: It seems that they must put a lot of energy into the process to convert the sea water into usable energy. Not useful from a practical point of view .... so far.

Good Vibrations Generate Electricity

PARTS LIST: Relying on the piezoelectric effect, a phenomenon in which certain crystals and other materials generate electricity when twisted or flexed, this new device harvests energy from tiny vibrations. Credit: ISNS

From Live Science:

A new device that can harvest useful energy from extremely tiny vibrations may allow new ways to power remote electronic devices with batteries that need replacing less often, or are actually self-charging. The "vibration-to-electricity" device could capture up to 10 times more energy than is possible with the conventional device.

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Egypt Warns Pharaohs' Tombs Could Disappear

A view of King Tutenkhamun's tomb in the Valley of the Kings, close to Luxor in 2007. The ornate pharaonic tombs in Egypt's Valley of the Kings are doomed to disappear within 150 to 500 years if they remain open to tourists, the head of antiquities has warned. (AFP/File/Cris Bouroncle)

From Yahoo News/AFP:

LUXOR, Egypt (AFP) – The ornate pharaonic tombs in Egypt's Valley of the Kings are doomed to disappear within 150 to 500 years if they remain open to tourists, the head of antiquities has warned.

Zahi Hawass said humidity and fungus are eating into the walls of the royal tombs in the huge necropolis on the west bank of the Nile across from Luxor, which is swamped daily by several thousand tourists.

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DNA Evidence Can Be Fabricated, Scientists Show

From The New York Times:

Scientists in Israel have demonstrated that it is possible to fabricate DNA evidence, undermining the credibility of what has been considered the gold standard of proof in criminal cases.

The scientists fabricated blood and saliva samples containing DNA from a person other than the donor of the blood and saliva. They also showed that if they had access to a DNA profile in a database, they could construct a sample of DNA to match that profile without obtaining any tissue from that person.

“You can just engineer a crime scene,” said Dan Frumkin, lead author of the paper, which has been published online by the journal Forensic Science International: Genetics. “Any biology undergraduate could perform this.”

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The Most Exciting Cars of 2010

STAN HONDA / AFP / Getty

From Time Magazine:

The popularity of the Jeep Grand Cherokee was instrumental in launching the SUV boom of the 1990s. America's love affair with big, gas-guzzling hulks is pretty much over, but Chrysler believes there's a new chapter for this rugged classic. Jeep's engineers have shortened the vehicle, given it a more aerodynamic shape and equipped it with a more luxurious interior, featuring more expensive materials and higher-grade controls. It also comes with a more efficient V-6 engine while trying to remain faithful to Jeep's can-do heritage. The introduction of the Jeep Grand Cherokee is now scheduled for the second quarter of 2010.

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Strep Throat May Have Killed Mozart

FILE - This is an undated portrait of Wolfgang Amadeus Mozart. What killed Mozart so suddenly in 1791? A report in Tuesday's Annals of Internal Medicine, a medical journal published in Philadelphia, suggests it might have been something far more common: a strep infection. (AP Photo)

From Yahoo News/Reuters:

NEW YORK (Reuters) – The death of composer Wolfgang Amadeus Mozart at the age of 35 may have been caused by complications stemming from strep throat, according to a Dutch study published on Monday. Since the composer's death in 1791, there have been various theories about the cause of his untimely end, from intentional poisoning, to rheumatic fever, to trichinosis, a parasitic disease caused by eating raw or undercooked pork.

On his death certificate it was officially recorded that the cause of death was hitziges Frieselfieber, or "heated miliary fever," referring to a rash that looks like millet seeds.

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In The Pursuit Of Easy Money

Legal pounds Photo: CORBIS

From The Telegraph:

One in every fifty £1 coins is a fake, but the dark art of counterfeiting has been fascinating forgers for centuries.

On the morning of March 22, 1699 a prisoner in Newgate was brought to the hanging tree at Tyburn, now Marble Arch. He played to the crowd, praying loudly and then placing his own hood over his head before the executioner’s men pulled the ladder out from under him. He dangled, twitching and choking for minutes – the trapdoor gallows would not come into routine use in Britain for another 50 years – until at last he drooped.

Thus died William Chaloner, the most notorious counterfeiter of his day, brought to his death by the Warden of the Royal Mint – a former Cambridge don named Isaac Newton.

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Honey-bee Aggression Study Suggests Nurture Alters Nature

The study looked at bee aggression in European (pictured) and Africanized honey bees. (Credit: Photo by Diana Yates)

From Science Daily:

ScienceDaily (Aug. 18, 2009) — A new study reveals that changes in gene expression in the brain of the honey bee in response to an immediate threat have much in common with more long-term and even evolutionary differences in honey-bee aggression. The findings lend support to the idea that nurture (an organism's environment) may ultimately influence nature (its genetic inheritance).

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How It Works: Protecting New Orleans With The World's Largest Water Pump

Foiling the Flood Graham Murdoch

From Popular Science:

New Orleans sits smack dab between the Gulf of Mexico and Lake Pontchartrain, and when a hurricane comes rolling in, those bodies of water tend to spill into the streets. This summer, the U.S. Army Corps of Engineers started construction on a barrier that can block a 16-foot swell blown in from the Gulf and a massive pumping station that will blast floodwaters back to sea.

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Internet 'Immune System' Could Block Viruses

Getting ISPs to cooperate could help in the fight against worms (Image: Thomas Northcut/Getty)

From New Scientist:

IT IS 0530 UTC, 25 January 2003. A computer worm named Slammer has just unleashed one of the most devastating attacks on the internet ever. Within minutes, it infects nearly 90 per cent of vulnerable computers. Major net links break down, ATM machines fail and airlines have to cancel flights.

What was impressive about Slammer was the overwhelming speed of infection. There was no chance to intervene. Six years on, our defences are little better.

Scott Coull of the University of North Carolina at Chapel Hill and Boleslaw Szymanski of the Rensselaer Polytechnic Institute in Troy, New York, want to change that. They have devised a system to combat highly virulent, malicious worms by embedding defence mechanisms in key parts of the internet - akin to endowing it with an immune system.

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The Science Behind That Fresh Seaside Smell

The smell of fresh sea air is unmistakable Photo: Getty

From The Telegraph:

A tiny molecule lurks behind the evocative smell of the seaside.

Think of the tangy smell of the sea, so evocative of summer holidays, the scream of seagulls and sand between your toes. Where does it come from? Ozone? Fresh sea air? Actually, the truth is slightly less tantalising: it's a gas released by bacteria.

Two years ago Andy Johnston, a professor of biology at the University of East Anglia, identified that the smell of the sea came from a molecule called dimethyl sulfide (DMS). Now, he has managed to crack the entire biochemical pathway by which the scent is produced. DMS turns out to be an important chemical found in many natural processes, such as cloud formation. Birds love the smell and will flock towards tiny concentrations. It's even added to processed foods to give a savoury note: small amounts can impart the flavour of cabbages, tomatoes, butter and cream – even lemons or roast chicken, according to Prof Johnston.

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Can Geoengineering Help Slow Global Warming?

From Time Magazine:

As we pump billions of tons of carbon dioxide into the atmosphere, we're doing more than warming the planet and scrambling the climate. We're also conducting what climatologist James Hansen has called a "vast uncontrolled experiment." In effect, we're on our way to engineering a world very different from the one we were handed. Belatedly, we're trying to turn off the carbon spigot, hoping that by incrementally reducing the emissions we've spent a couple of centuries pouring into the air we can stop the climate slide before it's too late.

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Popcorn And Cereals – The New Superfoods?

Popcorn contains high levels of antioxidants, according to a study by US chemical experts.

From The Guardian:

Scientists discover surprisingly high levels of health-boosting antioxidants in 'junk' food.

Popcorn and breakfast cereals, frequently derided as junk food, may contain "surprisingly large" servings of healthy antioxidants, according to chemical researchers.

Any nutritional value of snack foods was previously thought to rest on their high fibre content – a virtue regularly trumpeted by manufacturers on food packaging.

But a study presented today to the American Chemical Society (ACS) suggests the benefit of grain-based foods lies in the significant presence of antioxidants known as polyphenols.

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How Fast Can Man Run?

Click Image to Enlarge

From The Daily Mail:

As Jamaican sprinter Usain Bolt smashes his own world record, are there ANY limits to what the human body can achieve?.

The question is, just how fast can he go? We asked this back in August last year when he smashed his own 100metres world record at the Beijing Olympics.

Then, he did it in 9.69 seconds, but his insouciant, hands-aloft stroll over the finishing line made many suspect that there was more to go.

And on Sunday, a year to the day after setting that extraordinary record in China, Usain Bolt showed that there was - more than a tenth of a second, in fact. Now, if he could only sort out his dodgy start, he might be able to break the record once more.

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New Nanolaser Key To Future Optical Computers And Technologies

Researchers have created the tiniest laser since its invention nearly 50 years ago. Because the new device, called a "spaser," is the first of its kind to emit visible light, it represents a critical component for possible future technologies based on "nanophotonic" circuitry. The color diagram (a) shows the nanolaser's design: a gold core surrounded by a glasslike shell filled with green dye. Scanning electron microscope images (b and c) show that the gold core and the thickness of the silica shell were about 14 nanometers and 15 nanometers, respectively. A simulation of the SPASER (d) shows the device emitting visible light with a wavelength of 525 nanometers. (Credit: Birck Nanotechnology Center, Purdue University)

From Science Daily:

ScienceDaily (Aug. 17, 2009) — Researchers have created the tiniest laser since its invention nearly 50 years ago, paving the way for a host of innovations, including superfast computers that use light instead of electrons to process information, advanced sensors and imaging.

Because the new device, called a "spaser," is the first of its kind to emit visible light, it represents a critical component for possible future technologies based on "nanophotonic" circuitry, said Vladimir Shalaev, the Robert and Anne Burnett Professor of Electrical and Computer Engineering at Purdue University.

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Cloaking Technology May Protect From Natural Disasters

Like sound or light waves, tsunamis have a wavelength, crests and troughs that could be cancelled out to effectively cloak, say, an oil rig and protect it from the waves, based on new technology. But practically pulling such complex cloaking off will require a lot more research. Credit: Stockxpert

From Live Science:

Cloaking, that perennial technology of comic books and sci-fi series, may be one step closer to reality.

Researchers have developed a new cloaking method that may someday prevent submarines and fighter jets from being detected by sonar and radar. It might also be used to shield buildings and oil rigs from the devastating effects of earthquakes and tsunamis.

As it is often depicted in sci-fi movies and books, cloaking involves making an object partly or completely invisible to incoming radiation such as light or radio waves.

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Cockroaches Future-Proofed Against Climate Change

Climate change? Not bothered (Image: Natalie Schimpf)

From New Scientist:

Hate cockroaches? Best pour yourself a stiff drink. The widely loathed insects can hold their breath to save water, a new study has found – and the trick could help them to thrive in the face of climate change.

When cockroaches are resting, they periodically stop breathing for as long as 40 minutes, though why they do so has been unclear.

To investigate the mystery, Natalie Schimpf and her colleagues at the University of Queensland in Brisbane, Australia, examined whether speckled cockroaches (Nauphoeta cinerea) change their breathing pattern in response to changes in carbon dioxide or oxygen concentration, or humidity.

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The Smallest Laser Ever Made

Tiny laser: This simulation shows the intensity of light around a new type of laser, called a spaser, when operating in a plasmon-producing mode. The concentration of plasmons is most intense at the gold sphere that makes up its core. The inner black circle indicates the position of the sphere, which is coated with a dye-embedded silica shell, marked by the outer black line. Credit: Nature

From Technology Review:

Surface-plasmon lasers could enable a new generation of computers based on nanophotonics.

Researchers have demonstrated the smallest laser ever, consisting of a nanoparticle just 44 nanometers across. The device is dubbed a "spaser" because it generates a form of radiation called surface plasmons. The technique allows light to be confined in very small spaces, and some physicists believe that spasers could form the basis of future optical computers just as transistors are the basis of today's electronics.

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IBM Sees Future Of Microchips In DNA

From Breitbart/AFP:

IBM said it was looking to DNA "origami" for a powerful new generation of ultra-tiny microchips.

The US computer giant collaborated with California Institute of Technology researchers to develop a way to design microchips that mimic how chains of DNA molecules fold, allowing for processors far smaller and denser than any seen today.

"This is a way to assemble an electronics device of the future," said Bill Hinsberg, manager of the lithography group at IBM's Almaden Research Center in California, on Monday.

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Sony Plans to Adopt Common Format for E-Books

From The New York Times:

Paper books may be low tech, but no one will tell you how and where you can read them.

For many people, the problem with electronic books is that they come loaded with just those kinds of restrictions. Digital books bought today from Amazon.com, for example, can be read only on Amazon’s Kindle device or its iPhone software.

Some restrictions on the use of e-books are likely to remain a fact of life. But some publishers and consumer electronics makers are aiming to give e-book buyers more flexibility by rallying around a single technology standard for the books. That would also help them counter Amazon, which has taken an early lead in the nascent market.

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