| PPO |
This a health option provided to retirees who move out of the service area. It provides discounted services in a designated area.
출처: www.okccc.edu/humanresources/Glossary.html
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| ppb |
This works like above, but we multiply by one billion (10 9 ; caution: the word billion has different meanings in different countries). A solution with 1 ppb of solute has 1 microgram (10 -6 g) of material per liter.
출처: www.ilpi.com/msds/ref/concentration.html
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| ppm |
Parts per million works like percent by mass, but is more convenient when there is only a small amount of solute present. PPM is defined as the mass of the component in solution divided by the total mass of the solution multiplied by 10 6 (one million): A solution with a concentration of 1 ppm has 1 gram of substance for every million grams of solution. ...
출처: www.ilpi.com/msds/ref/concentration.html
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| ppt |
File extension that is associated with digital documents created in Microsoft PowerPoint. If you have or are given a file with this extension on it (for example, Presentation.ppt), it is likely the document was originally created in Microsoft PowerPoint.
출처: media.ucsc.edu/glossary.html
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| ppt |
This works like parts per million and parts per billion except that we multiply by one trillion (10 12 ). There are few, if any, solutes which are harmful at concentrations as low as 1 ppt. Note: "ppt" is sometimes used as laboratory shorthand for precipitate, which is entirely unrelated.
출처: www.ilpi.com/msds/ref/concentration.html
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