Be warned though; the nasal membranes are very sensitive and snorting ground chilli could be extremely painful and might even cause blistering.

More than half the particles were so small they could pass through the lungs or nasal membranes to enter people's organs and brains.

A faxed summary reprinted before the text mentions travelling through the nasal membranes of a rhinoceros, to a distant future dominated by estate agents and heavily armed kangaroos.

Another class of molecules, called ion channels, operates by forming tiny holes in the outer membrane of cells.

Cut away pith and outer membrane.

Ask your fishmonger to remove the skin and outer membrane of the monkfish tail.

Water enters, the outer membrane ruptures, and cytochrome c escapes.

The mitochondrial outer membrane becomes permeable to cytochrome c, a protein that transfers electrons within the mitochondrial respiratory chain.

Pulses, such as lentils, beans and chickpeas, are great bargain ingredients, but have a protective membrane that can toughen if seasoned too early.

The instructions were that the landfill should remain wet/moist to create a safe protective membrane.

The hedgehogs are birthed with a protective membrane covering their quills, which dries and shrinks over the next several hours.

Young specimens are covered entirely by an easily removed thin protective membrane.

The cord and its protective membranes bulge out through that gap, forming a sac.

Using a waterproof membrane lined with soft merino, they're breathable and comfortable.

Below ground, these are usually tanked with waterproof membrane, although some designers prefer to dig a drainage channel around the perimeter of the foundations.

A waterproof membrane was installed to a height of 4ft.

Roads, houses, shopping centres, industrial estates, car parks, paved-over gardens - all create a waterproof membrane that separates sky from earth and prevents rainwater from soaking away.

Why not create a small hill over a waterproof membrane, so that the leachate can be collected and dealt with safely?