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A radio smaller than a grain of sand

Using nanotubes, a group of American engineers has made una radio de transistores mucho más pequeña que un grano de arena.
Aun cuando esa radio sólo puede captar una estación, su fabricación constituye un gran paso para la fabricación de otros aparatos minúsculos y mucho más avanzados, según se publica en Proceedings of the National Acade my of Sciences (PNAS).
Estos científicos, de la Universidad de Illinois realizaron esta proeza utilizando nanotubos , constituidos por hileras de átomos centenares de miles de veces más finas que un cabello humano pero en conjunto constituyen un material semiconductor que puede aplicarse a aparatos and electronic circuits.
Radios consist of two radio frequency amplifiers and a frequency mixer, all materials made of nanotubes. The headphones, which are of normal size, are applied directly to a nanotube transistor also made and which also uses a normal-sized antenna.
We certainly face a major step in the development of new technology platforms for electrónica.Imagen: Nanoradio. At right, detail of components made of carbon nanotubes.

Source:

http://www.adn.es/tecnologia/20080129/NWS-0484-Usan-nanotubos-fabricar-pequeno-arena.html

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UK pressure on network providers to fight against 'piracy' U.S. scientists create

• The new regulations forced to leave without internet who are repeat downloads

REUTERS
LONDON .- The British Government has announced that service providers Internet (ISP) should collaborate actively in the fight against file-sharing on the Web, or you will face sanctions. London
is pressuring ISPs to reach an agreement with the music industry and film as, if not by law force them to disconnect those who are repeat illegal downloading of music or movies. In fact, it has been proposed as an April 2009 deadline to push through a new regulation in this regard, reports Kate Holton of Reuters.
Executive himself initiated the consultations on the legislation later this year, which could come before April next year, if no alternative solution has been agreed.
The British Government's desire is to reach an agreed solution, voluntary. Now, the government has issued a document to "address the problem of illegal file downloads." Meanwhile, suppliers have also made it known that they prefer a voluntary agreement, before requiring them since they do not want to be 'Internet police. "
Repeat offenders, punished without Red
Last week it was announced that the British Government was considering a bill to force providers disconnect users, but is now known the substance of the negotiations between the parties to reach an agreement.
This legislation, to succeed, would be for users who are suspected of such practices will be notified as soon as they caught for the first time, be suspended for some time the second time and, then repeat, goes offline and even their data could be communicated to the courts. British
This measure is similar to proposed in France in November last year , when President of the Republic, Nicolas Sarkozy, and some 50 industry associations, including the Internet Service Providers (ISPs) signed an agreement to have recourse to the Internet often unauthorized downloads of cultural content in France may lose Internet service.
"In the space of just four months, two governments, France and Britain, have adopted the simple idea that Internet service providers are in a unique position to help in the fight against digital piracy," said John Kennedy, director of trade body for the international music IFPI. "It's a radical change of attitude," he said.

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scouring pads designed to absorb CO2

breakthroughs are increasingly aimed at the preservation of the environment and the elimination of so-called greenhouse gases inverdadero. It follows the case of development, in which a team of U.S. scientists has developed a new material capable of capturing the main gas that causes climate change, carbon dioxide (CO2).
is an organic metal in the form of micro-sponges, capturing the gas at a temperature and pressure high. The idea is to use it in the future to capture the carbon dioxide emitted by coal plants or vehicles, and avoid the emission of gaseous pollutants into the atmosphere. Of the several prototypes
sponge created by scientists, the most efficient of them is capable of absorbing an amount of CO2 83 times its own volume.
To achieve these pores atrapagases "ZIFs baptized, have joined various kinds of metal such as cobalt or zinc with organic molecules. The main advantage is that once these sponges saturated metal can be "downloaded" and are ready to use them again.
The developers claim that these new materials can help in many areas of industry and everyday amitigar the EFET this and other gases. This, of course, if finally be viable marketing.

Source: http://www.elmundo.es/elmundo/2008/02/15/ciencia/1203077115.html

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Soon, spider silk stockings

all know that thanks to the extraordinary properties of silk spider the "Spider-Man is able to stop criminals and hang from buildings to fight crime. So far the story is fantasy, but thanks to a discovery by Japanese scientists using spider silk in daily life could be realized soon. The researchers found a novel way to produce spider silk fibers with those who say, may be manufactured from stockings and socks to vests. Using genetic engineering, scientists at Shinshu University in Tokyo, made of spider silk genes into the chromosome of silkworm. The resulting fiber, they say, is a mixture of silk and silk spider much more resistant and durable than conventional silk.

Properties

"Spider silk has properties that enhance the silkworm" explained Professor José Pérez-Rigueiro, Department of Materials Science, Polytechnic University Madrid.

"In particular a material that resists more and is deformed to a greater extent," he adds. It is known that the spider is five times stronger than steel plate the same thickness.

If you could build a web thickness of a pencil, it would be able to stop the flight of an aircraft.

The problem so far is that conventional breeding farm spiders has been impossible due to the nature of these insects cannibals, when their territory is threatened eat each other.

As explained by Professor Pérez-Rigueiro "the production of silk worm, which for thousands of years has been an important source of income is based on the fact that it is very easy to get the wires directly from the cocoon.

"But the spider does not exist a clear source with which you can obtain this material," says English researcher.

"That's why we have had to wait to work with genetic engineering techniques to create this material in sufficient quantities to have an industrial use," he adds.

The team of Prof. Masao Nakagaki , Faculty of Textile Science and Technology, contends that his finding can now mass-produce spider silk. Experts say, however, still must pass a series of problems to achieve this mass production.

"The main problem is that the proteins in spider silk are very large, six or seven times the size of a typical protein of a human being, and are very difficult to obtain genetically engineered," says Pérez-Rigueiro .

"What you're doing is working with fragments of these proteins and so far no one knows for sure what their outcome," the expert.

Uses

The Japanese team has yet to present their work but states that managed to create fibers that may occur soon-resistant materials such as for sporting equipment or protective clothing. Other applications include screens for tennis rackets, nets and twine for fishing rods and thread to suture in microsurgery and even bulletproof vests.

Source:

http://www.larepublica.com.uy/comunidad/288678-planifican-fabricar-medias-de-mujer-y-chalecos-antibalas