A field or course of study on which one focuses, especially as a student in a college or university
The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated
The act or process of removing the dress of ore and of reducing the valuable part to smaller compass, as by currents of air or water.
Concentration on something involves giving all your attention to it. Neal kept interrupting, breaking my concentration We lacked concentration and it cost us the goal and the game
The amount of a substance occurring in a given amount of a medium -- air, water, soil, tissue, etc It may be expressed e g , as parts per million, grams per liter, or in other units
A measure of the degree to which a few large firms dominate total sales, production, or capacity within an industry or market The concern is that the more concentrated an industry, the greater the likelihood of price and market manipulation For example, meat packer concentration has long been a concern of cattle producers It is common to express concentration as a ratio, by stating the share (%) held by the top 4, 8, or 12 firms
The ratio of mass or volume of solute present in a solution to the amount of solvent The quantity of ethyl alcohol (or sugar) present in a known quantity of water
A measure of the ratio of the amount of solute in a solution to the amount of either solvent or solution Frequently expressed in unites of moles of solute per liter of solution See molarity
is the measure of the atmospheric content of a gas, defined in terms of the proportion of the total volume that it accounts for Greenhouse gases are trace gases in the atmosphere and are usually measured in parts per million by volume (ppmv), parts per billion by volume (ppbv) or parts per trillion (million million) by volume (pptv)
The act, process or product of reducing the volume of a liquid, as by evaporation
in solutions, the mass, volume, or number of moles of solute present in proportion to the amount of solvent or total solution Common measures are: molarity, normality, percent, molality, and by specific gravity scales
The act or process of concentrating; the process of becoming concentrated, or the state of being concentrated; concentration
The act or process of removing the dress of ore and of reducing the valuable part to smaller compass, as by currents of air or water
The amount of a chemical agent present in a unit volume, usually expressed in milligrams per cubic meter (mg/m3) of air [123] Concentration can be used to calculate whether chemical warfare agent vapors would physically affect unprotected, exposed people
strengthening the concentration (as of a solute in a mixture) by removing extraneous material bringing together military forces the strength of a solution; number of molecules of a substance in a given volume (expressed as moles/cubic meter) the spatial property of being crowded together complete attention; intense mental effort increase in density
the strength of a solution; number of molecules of a substance in a given volume (expressed as moles/cubic meter)