What name is given to the passage of a solvent from a less concentrated into a more concentrated solution through a semi-permeable membrane?
Osmosis pressure in excess of the osmotic pressure. Osmosis may be used directly to achieve separation of water from a solution containing unwanted solutes. A "draw" solution of higher osmotic pressure than the feed solution is used to induce a net flow of water through a semi-permeable membrane, such that the feed solution becomes concentrated as the draw solution becomes dilute. The diluted draw solution may then be used directly (as with an ingestible solute like glucose), or sent to a secondary separation process for the removal of the draw solute. This secondary separation can be more efficient than a reverse
Concentrated disadvantage Concentrated disadvantage A concentrated disadvantage is a sociological term for neighborhoods with high percentages of residents of low socioeconomic status. It is expressed as the percent of households located in census tracts with high levels of concentrated disadvantage. Concentrated disadvantage has been found to be positively related to high school completion rates and to homicide rates. A positive association between concentrated disadvantage and rates of violence more generally has also been found; this relationship is mediated primarily by collective efficacy. There is also evidence that juvenile court officials perceive more disadvantaged neighborhoods as more dangerous, and so are less likely