Paper-Thin Batteries Made from Algae

Scientists worldwide are striving to develop thin, flexible, lightweight, inexpensive, environmentally friendly batteries made entirely from nonmetal parts. Among the most promising materials for these batteries are conducting polymers. However, until now these have impractical for use in batteries — for instance, their ability to hold a charge often degrades over use. The key to this new battery turned out to be an often bothersome green algae known as Cladophora. Rotting heaps of this hairlike freshwater plant throughout the world can lead to unsightly, foul-smelling beaches. This algae makes an unusual kind of cellulose typified by a very large surface area, 100 times that of the cellulose found in paper. This allowed researchers to dramatically increase the amount of conducting polymer available for use in the new device, enabling it to better recharge, hold and discharge electricity

Bioengineers Succeed in Producing Plastic Without the Use of Fossil Fuels

A team of pioneering South Korean scientists have succeeded in producing the polymers used for everyday plastics through bioengineering, rather than through the use of fossil fuel based chemicals. Polymers are molecules found in everyday life in the form of plastics and rubbers. The team, from the prestigious KAIST University and the Korean chemical company LG Chem, led by Professor Sang Yup Lee focused their research on Polylactic Acid (PLA), a bio-based polymer which holds the key to producing plastics through natural and renewable resources

Device Spells Doom for Superbugs

Researchers have demonstrated a prototype device that can rid hands, feet, or even underarms of bacteria, including the hospital superbug MRSA. The device works by creating something called a plasma, which produces a cocktail of chemicals in air that kill bacteria but are harmless to skin. A related approach could see the use of plasmas to speed the healing of wounds

Wikileaks Publishes 570,000 Messages Capturing Chaos of 11 September

The mental and emotional storm that struck America on 11 September 2001 with the attacks on New York and Washington has been recreated with the release of more than half a million pager messages sent on that day. The whistleblowing web site Wikileaks published the messages over a 24-hour period beginning on Tuesday at dawn, releasing them in batches in chronological order as if in real time. The massive archive includes thousands of messages from US officials including Pentagon workers and New York police, as well as members of the public from all over America, which together provide an insight into the initial chaos and confusion, followed by a dawning horror as 9/11 unfolded

Mobile Industry Cannot Identify Pirates

Mobile operators are unable to comply with proposed anti-copyright theft legislation that requires them to identify unlawful file-sharers. In the wake of the Digital Economy Bill, published on Friday, Mobile Broadband Group chief Hamish MacLeod told ZDNet UK that the government’s plans to force ISPs to hand over customer data to rights holders and potentially disconnect persistent infringers would apply to mobile operators. However, he said, operators have a problem with identification [of unlawful downloaders] to the telephone

Scientists Give Grubby Children a Clean Bill of Health

For parents too stretched to make sure their offspring are perfectly turned out at all times, it may just be the scientific cover they’ve been waiting for. They will now be able to answer the disapproving tuts of their more fastidious friends by pointing to research which gives biological backing to the old adage that the more germs a child is exposed to during early childhood, the better their immune system in later life

Brazilian Breaks Secrecy of Brazil’s E-Voting Machines With Van Eck Phreaking

After the report last week that Brazil’s e-voting machines had withstood the scrutiny of a team of invited hackers, reader ateu writes with news that a hacker has shown that the Linux-based voting machines aren’t perfectly safe; he was able to eavesdrop on them (translated from Portuguese) by means of Van Eck phreaking — via Slashdot

Do Not Call Numbers Set to Drop Off List

Australians who believed their home phone numbers were permanently protected from unsolicited marketing calls by joining the Do Not Call database may find themselves receiving fresh phone sales pitches next year, as the first entries on the national register expire. More than 4 million telephone numbers will be registered on the government database by the end of this year if growth patterns continue. But the three-year time limit on registrations will lapse for more than 1 million numbers, initially listed when the database opened in May 2007

Bing Censoring All Simplified Chinese Language Queries

Nicholas Kristof, a New York Times journalist, is calling for a boycott of Microsoft’s Bing. They have censored search requests at the request of the Chinese Government. The difference is that Bing has censored all searches done anywhere in simplified Chinese characters (the characters used in mainland China). This means that a Chinese speaker searching for Tiananmen anywhere in the world now gets the impression that it is just a lovely place to visit — via Slashdot

The Illustrated Man: How LED Tattoos Could Make Your Skin a Screen

New LED tattoos from the University of Pennsylvania could make the Illustrated Man real. Researchers there are developing silicon-and-silk implantable devices which sit under the skin like a tattoo. Already implanted into mice, these tattoos could carry LEDs, turning your skin into a screen. The silk substrate onto which the chips are mounted eventually dissolves away inside the body, leaving just the electronics behind. The silicon chips are around the length of a small grain of rice — about 1 millimetre, and just 250 nanometres thick. The sheet of silk will keep them in place, molding to the shape of the skin when saline solution is added