Hawaiian lava is extremely permeable and porous. The diffusion of water through a selectively permeable membrane is called osmosis. Osmosis is the movement of water molecules across a selectively permeable membrane. Note that a semipermeable membrane is not the same as a selectively permeable membrane. Ultrafiltration concentrates a protein solution using selective permeable membranes. Aceclofenac falls under the BCS Class II, poorly soluble and highly permeable drug. It is due to the oozing of exudate from abnormally permeable capillaries. The central plains are characterised by poor, arid and permeable soil. Like other amphibians, oxygen can pass through their highly permeable skins. The roofs were probably of thatch with eaves which overhung the permeable walls. These sites are freely permeable to water. To an external field, the core is alternately weakly permeable and highly permeable. The magnetic circuit is completed by a C-shaped core of permeable iron. The channels are also highly permeable to Ca. And therefore their flesh is ulcerated and permeable [to disease].