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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]
The Đại Việt sử ký tục biên or the Cảnh Trị edition (1665), that was the era name of Lê Huyền Tông has a better status of conservation but the most popular and fully preserved version of Đại Việt sử ký toàn thư until now is the Chính Hòa edition (1697) which was the only woodblock printed version of this work. [12]
Từ điển bách khoa toàn thư Việt Nam (Encyclopedia of Vietnam), a state-sponsored encyclopedia which was published in 2005. Vietnamese Wikipedia, a project of the Wikimedia Foundation. Vietnam War encyclopedias. Encyclopedic works and encyclopedias focused on Vietnam War-related topics.
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 ...
Trần Phú graduated thành chung (general qualification) in 1922 and in 1925 he joined Hội Phục Việt (later renamed Tân Việt Cách mạng Đảng) in Vinh, Nghệ An. [ 4 ] [ 5 ] In 1926, he went to Canton ( Guangzhou ), China, to arrange the merger of his organization with the Vietnam Revolutionary Youth League .
Originally, many thước of varying lengths were in use in Vietnam, each used for different purposes. According to Hoàng Phê (1988), [1] the traditional system of units had at least two thước of different lengths before 1890, [2] the thước ta (lit. "our ruler") or thước mộc ("wooden ruler"), equal to 0.425 metres (1 ft 4.7 in), and the thước đo vải ("ruler for measuring ...
Between 1986 and 1990, he was a Ph.D. candidate at University of Economics in Bratislava in Czechoslovakia. He then moved on to work as a lecturer at the Faculty of Accounting, Hanoi University of Finance and Accountacy from 1991 to 1992, after which he served as Deputy Dean of Faculty of Accounting, Hanoi University of Finance and Accountancy ...
Việt Nam Danh Nhân Từ Điển. Phạm Thế Ngữ. Việt Nam Văn Học Sử. Trần Trọng Kim. Việt Nam Sử Lược. Nguyễn Bỉnh Khiêm, The Bach Vân Am Quôc-Ngu Thi Tâp, Text in Latin script and chữ nôm script, translation in French, Bulletin de la Société des études indochinoises, Saigon, 1974, 312 P.
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