|
|
Add new Web site: National Center for Biotechnology Information - PubMed Central - Role of pH Value in Clinically Relevant Diagnosis. |
|
Dec 09, 2024 |
|
|
Add new Web site: Lenntech - pH and alkalinity. |
|
Jul 22, 2024 |
|
|
Add new Web site: USGS - Water Science School - pH and Water. |
|
Jan 25, 2024 |
|
|
Add new Web site: Chemistry LibreTexts - The pH Concept. |
|
Mar 27, 2023 |
|
|
Add new Web site: Chemistry LibreTexts - The pH Concept. |
|
Mar 27, 2023 |
|
|
Add new Web site: United States Environmental Protection Agency - pH. |
|
Aug 29, 2022 |
|
|
New media added. |
|
Jun 03, 2020 |
|
|
Changed “National Bureau of Standards” to “National Institute of Standards and Technology.” |
|
May 18, 2020 |
|
|
Add new Web site: BBC Bitesize - The pH scale and neutralisation. |
|
Jan 11, 2019 |
|
|
Mentioned litmus paper and Ericaceae species that benefit from acidic soils. |
|
Jan 20, 2017 |
|
|
Add new Web site: National Oceanic and Atmospheric Administration - Pacific Marine Environmental Laboratory - A Primer on pH. |
|
Nov 30, 2016 |
|
|
Add new Web site: Utah State University Extension - What is pH? |
|
Nov 30, 2016 |
|
|
Add new Web site: Elmhurst College - Chemistry@Elmhurst - pH Scale. |
|
Nov 30, 2016 |
|
|
Added new Web site: Hyperphysics - pH. |
|
Sep 29, 2008 |
|
|
Added new Web site: The Power of Protons: An Ongoing Attempt to Simplify the Understanding of Calculations Involving pH. |
|
Jun 29, 2006 |
|
|
Article added to new online database. |
|
Jul 20, 1998 |
