These particles are injected directly into the target tumour, rather than relying on the leaky walls of tumour capillaries to get them to the right place.

ECONOMIST: Treating tumours

Nor is it an attempt to win newcomers over to a particular world view - the guests are not being forcibly injected with Blairite nano-particles.

BBC: Breakfast at Tony's

When it is injected into muscle, the AAV particles are sucked up by the hand-like protrusions connecting muscles with the nervous system, all the way back up into the spinal cord.

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Carbo Ceramics ( CRR - news - people )(CRR, 73) , a Houston firm that makes various forms of "proppant, " particles (sand or a synthetic substitute) injected along with the fracking fluid to keep the fissures propped open after the pressure is withdrawn.

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In order to track the movements of the cells, his team attached tiny magnetic particles to them before they transplanted them, and also injected them with a dye.

ECONOMIST: Stem cells