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  2. pH meter - Wikipedia

    en.wikipedia.org/wiki/PH_meter

    A pH meter is a scientific instrument that measures the hydrogen-ion activity in water-based solutions, indicating its acidity or alkalinity expressed as pH. [2]

  3. Vietnamese encyclopedias - Wikipedia

    en.wikipedia.org/wiki/Vietnamese_encyclopedias

    Following the increasing of Internet usage in Vietnam, many online encyclopedias were published. The two largest online Vietnamese-language encyclopedias are Từ điển bách khoa toàn thư Việt Nam, a state encyclopedia, and Vietnamese Wikipedia, a project of the Wikimedia Foundation.

  4. pH indicator - Wikipedia

    en.wikipedia.org/wiki/PH_indicator

    A pH indicator is a halochromic chemical compound added in small amounts to a solution so the pH (acidity or basicity) of the solution can be determined visually or spectroscopically by changes in absorption and/or emission properties. [1] Hence, a pH indicator is a chemical detector for hydronium ions (H 3 O +) or hydrogen ions (H +) in the ...

  5. Từ điển bách khoa toàn thư Việt Nam - Wikipedia

    en.wikipedia.org/?title=Từ_điển_bách_khoa...

    Pages for logged out editors learn more. Contributions; Talk; Từ điển bách khoa toàn thư Việt Nam

  6. Từ điển Bách khoa Việt Nam - Wikipedia

    en.wikipedia.org/?title=Từ_điển_Bách_khoa...

    Retrieved from "https://en.wikipedia.org/w/index.php?title=Từ_điển_Bách_khoa_Việt_Nam&oldid=502103327"

  7. Encyclopedic Dictionary of Vietnam - Wikipedia

    en.wikipedia.org/wiki/Encyclopedic_Dictionary_of...

    Từ điển bách khoa Việt Nam (lit: Encyclopaedic Dictionary of Vietnam) is a state-sponsored Vietnamese-language encyclopedia that was first published in 1995. It has four volumes consisting of 40,000 entries, the final of which was published in 2005. [1] The encyclopedia was republished in 2011.

  8. High School for Gifted Students, VNU University of Science

    en.wikipedia.org/wiki/High_School_for_Gifted...

    The HUS High School for Gifted Students, commonly known as High School for Gifted Students of Science (HSGS; Vietnamese: Trường Trung học phổ thông chuyên Khoa học Tự nhiên), is a specialized, most-selective (6% acceptance rate) public magnet school of VNU University of Science, a member of Vietnam National University, Hanoi system.

  9. Vietnamese phonology - Wikipedia

    en.wikipedia.org/wiki/Vietnamese_phonology

    In many regions of Northern Vietnam, the pair /n/ and /l/ have merged into one, they are no longer two opposing phonemes. Some native Vietnamese speakers who lack linguistic knowledge believe that pronouncing the initial consonant of a word whose orthographic form begins with the letter l as /n/ , n as /l/ is nói ngọng . [ 3 ]

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