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このページでは、よみがながつかないところがあります。https://en.wikipedia.org/wiki/Parts-per_notation
Parts-per notation - Wikipedia
Since these fractions are quantity-per-quantity measures, they are pure numbers with no associated units of measurement. Commonly used are parts-per-million ( ...
https://en.wikipedia.org/wiki/PPM
PPM - Wikipedia
Computing ・ Pages per minute, a measurement of printing speed ・ Perl package manager, for software packages ・ Planted partition model, a special case of ...
https://study.com/academy/lesson/parts-per-million-definition-calculation-example.html?srsltid=AfmBOor9SJ4Ai-MwbZRoVcOwkzaZ4Cke2Qto2dqeNKHuWHYiq7Q1e4ou
Parts Per Million | PPM Definition, Units & Calculation - Study.com
PPM is calculated by dividing the mass of the solute by the mass of the solution, then multiplying by 1,000,000. Both parts of the equation must be in the same ...
https://groups.molbiosci.northwestern.edu/holmgren/Glossary/Definitions/Def-P/parts_per_million.html
Parts per million (ppm) definition
Just as per cent means out of a hundred, so parts per million or ppm means out of a million. Usually describes the concentration of something in ...
https://oit.ncsu.edu/about/units/sc/ppm/what-is-ppm/
What is PPM? – Office of Information Technology - NCSU OIT
Project Portfolio Management, or PPM, is used by organizations throughout the world to enhance the selection and execution of projects.
https://www.nrc.gov/reading-rm/basic-ref/glossary/parts-per-million-ppm.html
Parts Per Million (ppm) | NRC.gov
Parts per million (ppm) Parts (molecules) of a substance contained in a million parts of another substance (eg, water).
https://www.merriam-webster.com/dictionary/ppm
Ppm Definition & Meaning - Merriam-Webster
What does the abbreviation PPM stand for? Meaning: pages per minute.
https://www.dictionary.com/browse/ppm
PPM Definition & Meaning - Dictionary.com
Ppm definition: parts per million.. See examples of PPM used in a sentence.
https://dictionary.cambridge.org/us/dictionary/english/ppm
PPM | definition in the Cambridge English Dictionary
PPM meaning: 1. abbreviation for parts per million (= a unit for measuring the amount of a substance that is…. Learn more.
https://www.climate.gov/news-features/understanding-climate/climate-change-atmospheric-carbon-dioxide
Climate Change: Atmospheric Carbon Dioxide
Global average atmospheric carbon dioxide was 419.3 parts per million (“ppm” for short) in 2023, setting a new record high.
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