(Ticaret) (part period balancing) A lot size technique that uses look ahead and look back functions to consider additional periods in modifying an initial calculation based on least total cost
Parts per billion is the concentration of a gas or vapor in air-parts (by volume) of the gas or vapor in a billion parts of air Usually used to express extremely low concentrations of unusually toxic gases or vapors; also the concentration of a particular substance in a liquid or solid
Parts of the analyte per billion parts of sample [Caution! "Billion" is defined differently in different parts of the world Please see "About Units" in this web
Parts per billion One part per billion corresponds to approximately 1 second in 31 7 years Also the same as micrograms per liter (µg/L)
Parts per billion or micrograms per liter (µg/L) Imagine 1,000 rooms 10 feet wide, 10 feet long, and 10 feet high filled with ice cubes, and one of those ice cubes were blue, that blue ice cube would represent one part per billion Español
Parts per billion, a measure of concentration, such as parts of a chemical per billion parts of air or water Ppb is one thousand times smaller than ppm
'Parts per billion; how many parts in a sample that consisted of 1,000,000,000 parts would be what is being looked at E g 500ppb carbon means that for a mass of 1,000,000,000 grams, 500 grams would be carbon