They have semi-permeable membranes, which allow water in but keep most of the salt out.

The movement of water by diffusion through a semi-permeable membrane.

One theoretical means would be through an ideal semi-permeable membrane.

The water will then try to break through the semi-permeable membrane (either the surface of the concrete or the primer).

In this process, water is forced under pressure through a synthetic, semi-permeable membrane into a storage tank.

As the shell grew, the back compartments were sealed with a semi-permeable membrane.

An example of this would be ion concentration gradients across a semi-permeable membrane.

A semi-permeable membrane allows oxygen to diffuse into the electrode.

Clear any weeds like ground elder and hogweed, then put down a semi-permeable membrane.

A semi-permeable membrane allows solvent particles to pass in both directions.

Pre-cells would have had semi-permeable membranes, allowing only certain molecules to pass through.

Cells are enveloped in semi-permeable membranes that act as a barrier between the inside and outside of the cell.

A process for reducing the mineral content of water by forcing it to flow under pressure through a semi-permeable membrane.

Nitrox systems use semi-permeable membranes to separate out a portion of the nitrogen in air.

Each chloroplast is surrounded by a double walled semi-permeable membrane.

Due to the surface charge of the particles a clayey layer may act as a semi-permeable membrane.

A semi-permeable membrane, like living cells have.

His body started the process automatically, exuding a transparent liquid that hardened into a tough semi-permeable membrane.

A reverse osmosis treatment system usually consists of a semi­permeable membrane, water storage tank and dispensing faucet.

A vacuole is surrounded by a thin layer of cytoplasm which acts as a semi-permeable membrane.

Another example is in separation and mixing of gases, with use of chemically semi-permeable membranes.

Membrane gas separation - Gas is forced through a semi-permeable membrane by a pressure difference.

Castle walls are like semi-permeable membranes in that they are very selective about what they pass through.

Morse's main experimental contribution was an electrolytic method of depositing semi-permeable membranes.

In reverse osmosis, water is forced through a semi-permeable membrane that filters out the salt crystals and other impurities.

He states "only water molecules can pass the semipermeable membrane.

Though the different systems are at equilibrium, there is still water passing through the semipermeable membrane.

Osmosis is the transmission of a liquid through a semipermeable membrane.

At Caterpillar earlier this year, the picket line was a semipermeable membrane.

The human wore a breather, a semipermeable membrane that was nearly invisible over his face.

In the situation most often encountered, the semipermeable membrane separates one liquid solution from another.

This has to do with osmosis or the diffusion of water across a semipermeable membrane.

With reverse osmosis, he said, water under pressure is passed through an extraordinarily fine semipermeable membrane.

Something martian was still seeping through the semipermeable membrane.

Another example of a semipermeable membrane is dialysis tubing.

A material can be semipermeable, with the presence of a semipermeable membrane.

The fiber wall acts as the semipermeable membrane.

Membrane processes use semipermeable membranes and pressure to separate salts from water.

A semipermeable membrane is a material through which only certains kinds of molecules can readily pass.

The cells of the strawberry have semipermeable membranes.

Fresh water moves in a semipermeable membrane and increases its volume in the chamber.

The placenta is a semipermeable membrane that allows certain substances to travel through to the fetus.

These are semipermeable membranes manufactured principally for use in water purification or desalination systems.

Cell membranes are essentially lipid bilayers which form a semipermeable membrane.

Such a concentration gradient across a semipermeable membrane sets up an osmotic flow for the water.

Touch the silk and scent escapes the semipermeable membrane and pervades the air.

The semipermeable membrane prevents cells, cellular debris, and proteins from entering into the dialysate.

In this system a semipermeable membrane separates two solutions of different concentration of the same solute.

He also noted that a thin film of oil behaves as a semipermeable membrane, precisely as predicted.

It was a semipermeable membrane.