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‘Quadruple helix’ DNA seen in human cells

January 22, 2013

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Cambridge University scientists say they have seen four-stranded DNA at work in human cells for the first time.

The famous “molecule of life”, which carries our genetic code, is more familiar to us as a double helix.

But researchers tell the journal Nature Chemistry that the “quadruple helix” is also present in our cells, and in ways that might possibly relate to cancer.

They suggest that control of the structures could provide novel ways to fight the disease.

~~~QuadrupleHelix1

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http://www.bbc.co.uk/news/science-environment-21091066

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Climate change: Soot’s role underestimated, says study

January 16, 2013

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Black carbon, or soot, is making a much larger contribution to global warming than previously recognized, according to research.

Scientists say that particles from diesel engines and wood burning could be having twice as much warming effect as assessed in past estimates.

They say it ranks second only to carbon dioxide as the most important climate-warming agent.

The research is in the Journal of Geophysical Research-Atmospheres.

~~~Soot1

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http://www.bbc.co.uk/news/science-environment-21033078

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‘Olympic rings’ molecule olympicene in striking image

November 12, 2012

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Researchers have succeeded in taking a stunning image of a newly synthesised molecule called olympicene.

The molecule – just over a billionth of a metre across – gets its name because its five linked rings resemble the Olympic symbol.

It was first made by collaborators at the University of Warwick in the UK.

The technique showcases details well under a billionth of a metre in size

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http://www.bbc.co.uk/news/science-environment-18206015

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Smart hand pumps promise cleaner water in Africa

October 18, 2012

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Rural communities across Africa may soon benefit from improved water supplies thanks to mobile phone technology.

UK researchers have developed data transmitters that fit inside hand pumps and send text messages if the devices break down.

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http://www.bbc.co.uk/news/science-environment-18358766

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Mars rover makes first colour panorama

September 28, 2012

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Nasa’s new Mars rover has returned its first 360-degree colour panorama from the surface of the Red Planet. The Curiosity robot used its wideangle science camera placed high up on a mast to acquire the frames.

The low-resolution vista shows at centre the big mountain that lies in the middle of Gale Crater, the deep depression in which the rover landed.

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http://www.bbc.co.uk/news/science-environment-19201742

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Green energy ‘cheap within years’, says ‘passionate’ PM

August 3, 2012

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Renewables can be one of the cheapest forms of energy within years, Prime Minister David Cameron has said. But they need to become economically self-sustaining, truly global, and must receive continued research support.