After cure the cello and mandrel are removed leaving a hollow carbon tube.

A dent in a metal tube or crack in a carbon tube significantly weakens the tube.

The lesser density means the tubes of crafted hardwood bikes and tubes of bamboo have thicker walls than a metal or carbon tube of similar strength would.

Today he takes on 150 rivals from across the globe who will use tripods and lightweight carbon tubes to hit a dartboardsized putty target from 12ft.

The viruses work like miniature robots, recognising and binding only to certain materials - in this case tiny carbon tubes - to form themselves into conductive 'nanowires'.