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  2. Total dissolved solids - Wikipedia

    en.wikipedia.org/wiki/Total_dissolved_solids

    Total dissolved solids ( TDS) is a measure of the dissolved combined content of all inorganic and organic substances present in a liquid in molecular, ionized, or micro-granular ( colloidal sol) suspended form. TDS are often measured in parts per million (ppm). TDS in water can be measured using a digital meter.

  3. Ultrapure water - Wikipedia

    en.wikipedia.org/wiki/Ultrapure_water

    Ultrapure water (UPW), high-purity water or highly purified water (HPW) is water that has been purified to uncommonly stringent specifications. Ultrapure water is a term commonly used in manufacturing to emphasize the fact that the water is treated to the highest levels of purity for all contaminant types, including: organic and inorganic compounds; dissolved and particulate matter; volatile ...

  4. TDS Telecom - Wikipedia

    en.wikipedia.org/wiki/TDS_Telecom

    TDS Telecom is an American telecommunications company with headquarters in Madison, Wisconsin.It is a wholly owned subsidiary of Telephone and Data Systems Inc, and is the seventh-largest local exchange carrier in the U.S. TDS Telecom offers telephone, broadband Internet and television services to customers in 30 states and more than 900 rural and suburban communities, though it also serves ...

  5. Hard water - Wikipedia

    en.wikipedia.org/wiki/Hard_water

    In domestic settings, hard water is often indicated by a lack of foam formation when soap is agitated in water, and by the formation of limescale in kettles and water heaters. [2] Wherever water hardness is a concern, water softening is commonly used to reduce hard water's adverse effects.

  6. Trump derangement syndrome - Wikipedia

    en.wikipedia.org/wiki/Trump_derangement_syndrome

    Trump derangement syndrome (TDS) is a pejorative term, usually for criticism or negative reactions to former United States president Donald Trump that are perceived to be irrational and to have little regard towards Trump's actual policy positions, or actions undertaken by his administration.

  7. Fix problems signing into your AOL account - AOL Help

    help.aol.com/articles/help-signing-in

    Call paid premium support at 1-800-358-4860 to get live expert help from AOL Customer Care. Having trouble signing in? Find out how to identify and correct common sign-in issues like problems with your username and password, account locks, looping logins, and other account access errors.

  8. Conductivity (electrolytic) - Wikipedia

    en.wikipedia.org/wiki/Conductivity_(electrolytic)

    Conductivity (electrolytic) Conductivity or specific conductance of an electrolyte solution is a measure of its ability to conduct electricity. The SI unit of conductivity is siemens per meter (S/m). Conductivity measurements are used routinely in many industrial and environmental applications as a fast, inexpensive and reliable way of ...

  9. Freezing-point depression - Wikipedia

    en.wikipedia.org/wiki/Freezing-point_depression

    Freezing-point depression. Freezing point depression is responsible for keeping ice cream soft below 0°C. [1] Freezing-point depression is a drop in the maximum temperature at which a substance freezes, caused when a smaller amount of another, non- volatile substance is added. Examples include adding salt into water (used in ice cream makers ...