The metamaterials space race (22 March 2007)
They said it couldn't be done. Ok, they still do, really. But the technology that makes invisibility shields a theoretical possibility took a major step forward with reports of a material that bends visible light away from itself.
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Radioactive scorpion venom stings brain tumours (28 July 2006)
Scorpion venom carries a nasty sting for brain tumour cells, according to US researchers. A peptide based on chlorotoxin, found in the venom of the Giant Yellow Israeli Scorpion, has been used to target glioma, a particularly aggressive form of brain tumour.
A synthetic form of the peptide, known as TM-601, is not only able to pass the blood-brain barrier with ease, but also seeks out and selectively binds to glioma cells.
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Bubbles put the logic into lab-on-a-chip
The boundary between computing and chemistry has been redrawn, thanks to devices that mimic digital processors using the physical properties of flowing liquids and bubbles. The development opens the way for programmable lab-on-a-chip technologies without external control systems, claim the researchers.
In these devices the 'bits' (the zeroes and ones of binary language) are tiny gas bubbles in a stream of liquid flowing through precisely designed channels a few micrometres across.
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