quantity-per-quantity measures, they are pure numbers with no associated units of measurement. Commonly used are parts-per-million (ppm, 10−6), parts-per-billion...

More Parts per Million is The Thermals' debut studio album. The album was released in 2003 on Sub Pop Records. Only $60 was spent on the recording and...

In chemistry and fluid mechanics, the volume fraction φ i {\displaystyle \varphi _{i}} is defined as the volume of a constituent Vi divided by the volume...

than 3.4 defects per million opportunities (or services provided). Note that DPMO differs from reporting defective parts per million (PPM) in that it...

an eye condition Physician practice management PPM (Pay per 1000 impressions) Parts per million, ppm Carbon dioxide in Earth's atmosphere, CO2 ppm Peak...

300 parts per million in soils. Tin also occurs in concentrations of one part per thousand in igneous rocks. Lead makes up 14 parts per million of the...

are defined as one part capsaicin equivalent per million parts dried pepper mass. This "parts per million of heat" (ppmH) is found with the following calculation:...

bromine per day. There are typically 5 parts per million of bromine in human blood, 7 parts per million of bromine in human bones, and 7 parts per million of...

estimated crustal abundance for each chemical element shown as mg/kg, or parts per million (ppm) by mass (10,000 ppm = 1%). The Earth's crust is one "reservoir"...

The salt concentration is usually expressed in parts per thousand (permille, ‰) and parts per million (ppm). The USGS salinity scale defines three levels...

by museums. Copper deposits are abundant in most parts of the world (globally 70 parts per million), and it has therefore always been a relatively cheap...

elements in our galaxy (estimated spectroscopically), as measured in parts per million, by mass. Nearby galaxies that have evolved along similar lines have...

average concentration of CO2 reached a new record high of 425.22 parts per million (ppm), marking an increase of 4.7 ppm over March 2023. By the latest...

(3.785412 L). It translates into 1 part in about 58,000 parts of water or 17.1 parts per million (ppm). Also called Clark degree (in terms of an imperial...

laboratory instruments capable of measuring to accuracies of a few parts per million. Part of the problem of making an accurate voltmeter is that of calibration...

parts of the atmosphere, although still small in relation to other gases in the stratosphere. The ozone layer contains less than 10 parts per million...

gold or tungsten. It occurs naturally in low concentrations of a few parts per million in soil, rock and water, and is commercially extracted from uranium-bearing...

gluten-free. "Gluten-free" is defined as 20 parts per million of gluten or less and "very low gluten" is 100 parts per million of gluten or less; only foods with...

silica 80 parts per million, sodium 51 parts per million, sulfate 45 parts per million, carbonate 36 parts per million, chloride 13 parts per million, calcium...

group. Nitrogen makes up 25 parts per million of the Earth's crust, 5 parts per million of soil on average, 100 to 500 parts per trillion of seawater, and...

±20 parts per million (8.6 to 1.7 seconds per day), but temperature-compensated RTC ICs are available accurate to less than 5 parts per million. In practical...

acre and the US survey acre are in use, but they differ by only four parts per million (see below). The most common use of the acre is to measure tracts...

purposes, leading to variations in the length of the furlong of two parts per million, or about 0.4 millimetres (1⁄64 inch). This variation is too small...

definition of a kilogram agrees with this original definition to within 30 parts per million. In 1799, the platinum Kilogramme des Archives replaced it as the...

in 100 Per mille (‰) 1 part in 1,000 Per cent mille (pcm) 1 part in 100,000 Parts per million (ppm) 1 part in 1,000,000 Parts-per notation Per-unit system...

indirect decay product of uranium-238, but it makes up only 0.0055% (55 parts per million, or 1/18,000) of the raw uranium because its half-life of just 245...

Parts per Billion is a 2014 American romantic drama written and directed by Brian Horiuchi. It stars an ensemble cast comprising Frank Langella, Gena...

alone. For example, herring contains mercury at approximately 0.01 parts per million (ppm) and shark contains mercury at greater than 1 ppm. DDT is a pesticide...

pathway to PFOA. PFOA and PFOS were detected in "very high" (low parts per million) levels in agricultural fields for grazing beef cattle and crops around...

the parsec. One au is equivalent to 499 light-seconds to within 10 parts per million. A variety of unit symbols and abbreviations have been in use for...