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Handwritten SMS PenPhone

24.05.2004

Siemens plans to present an interesting novelty at the annual CeBIT exhibition - a mobile phone in the form of a writing pen. The unusual device was named Siemens PenPhone. It allows you to write text on any surface (including air), and then execute what is written. So now you can write any number and call it.

Significantly simplifies the process of typing SMS-messages: PenPhone allows you to recognize any handwritten text. PenPhone is similar in size to a regular ballpoint pen - length 140 mm, diameter 19 mm. Siemens is confident that the PenPhone is capable of making a revolution, however, while the company does not even name the date of its release on sale.

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Uranus from the ocean 19.05.2013

Scientists have created a special organometallic mesh that collects uranium in sea water 4 times more efficiently than existing analogues.

Researchers led by chemistry professor Wenbin Lin of the University of North Carolina have developed an organometallic network that can collect uranium ions dissolved in seawater. Until now, the most advanced technology for "fishing" uranium out of sea water was considered to be synthetic fibers, on the surface of which special chemicals were applied that bind uranium.

In contrast, the new mesh in laboratory tests works at least 4 times more efficiently and easily extracts raw materials for nuclear fuel from the water. In the future, this technology may provide an alternative source of expensive fuel for reactors, as well as be used to treat water contaminated with radioactive substances.

Organometallic structures are considered very promising for a number of technological applications, including the storage of gases and the separation of mixtures of substances. The structure of organometallic materials can be customized to serve a variety of purposes, for example the porous structure is used in many commercial adsorbents. In addition, like organic polymers, organometallic structures can be "trained" to bind to various specific molecules.

About 4 billion tons of uranium are dissolved in the world's oceans - this is about 600 more than all uranium reserves on land. But extracting uranium from sea water is extremely difficult due to its low concentration: 3 parts per billion. Modern mining technologies would require the use of a very large amount of plastic adsorbent, which would lead to large-scale pollution of the ocean with plastic. This plastic must be in sea water for several weeks, and during this time, in addition to uranium, many other "useless" ions will get into the adsorbent. All this makes the extraction of uranium from water a very laborious and expensive undertaking. In numbers, it looks like this: a kilogram of uranium mined from the ocean by modern methods will cost from $1000 to $2000 per kilogram, about 10-20 times the current market price.

The new material could make a difference as it is much more efficient. So, in the laboratory, 1 gram of an organometallic adsorbent was able to collect more than 200 milligrams of uranium, which is a good indicator. The developers note that the new technology can significantly reduce the cost of extracting uranium from sea water - even if "sea" uranium is 2 times more expensive than "land" uranium, it will already be competitive due to various economic and political reasons.

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