This is why cord blood can be used for transplantation as an alternative to bone marrow. Cord blood is being used increasingly on an experimental basis as a source of stem cells, as an alternative to bone marrow. Most cord blood transplants have been performed in patients with blood and immune system diseases.
(= (S + (p. . Solute potential is at a maximum at zero (distilled water), whereas pressure potential can be negative (vacuum), zero (one atmosphere), or positive (greater than zero). So distilled water at normal atmospheric pressure has a water potential of zero ((= 0).
The differences in solute concentration create a difference in osmotic pressure across the membrane (Î´Ï), causing a net flow of water (open circles) into the cell, raising its hydrostatic pressure (measured from the difference in fluid height, Î´P). Osmotic equilibrium is reached when Î´P=Î´Ï (see text).