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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]
Phan Khôi (October 06, 1887 – January 16, 1959) was an intellectual leader who inspired a North Vietnamese variety of the Chinese Hundred Flowers Campaign, in which scholars were permitted to criticize the government, but for which he himself was ultimately persecuted by the Communist Party of Vietnam.
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.
Phan Đình Phùng (Vietnamese: [faːn ɗîŋ̟ fûŋm]; 1847 – January 21, 1896) was a Vietnamese revolutionary who led rebel armies against French colonial forces in Vietnam. He was the most prominent of the Confucian court scholars involved in anti-French military campaigns in the 19th century and was cited after his death by 20th-century ...
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 ...
Phạm Xuân Ẩn (born Phạm Văn Thành; September 12, 1927 – September 20, 2006) was a notable Vietnamese spy, journalist, and correspondent for Time, Reuters and the New York Herald Tribune, stationed in Saigon during the war in Vietnam.
According to historian Nguyễn Đình Đầu, [3] [4] the trường xích and điền xích were both equal to 0.4664 metres (1 ft 6.36 in), while according to Phan Thanh Hải, [5] there were three main thước: the thước đo vải, from 0.6 to 0.65 metres (2 ft 0 in to 2 ft 2 in); the thước đo đất ("ruler for measuring land"), at ...
Phan Châu Trinh was born in Tây Lộc village, Hà Đông district, Thăng Bình fu (now is Tam Lộc commune, Phú Ninh district) of Quảng Nam province in 1872.He was the third son of a rich and famous scholar, who joined and became an official in the Cần Vương association of Quảng Nam in 1885.