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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]
This category contains articles about pH indicators: chemical compounds which change colour or fluorescence in response to changes in pH Wikimedia Commons has media related to PH indicators . Subcategories
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 ...
The tree professional used a type of meter called a Luvcosy Soil pH Meter, which claims to use "double-needled probe made of stainless steel"; the probes are ~2.2 cm apart. This type of probe material is not mentioned in the article.
Vietnam has abundant surface and ground water resources. [11] Nevertheless, local shortages can occur during the dry season. For example, the basins of the Dong Nai River in South Vietnam, the Southeast River Cluster, Ma River in North Central Vietnam, Kone River and Huong River are expected to be at risk of exceeding projected water needs in ...
The Ministry of Science and Technology (MOST, Vietnamese: Bộ Khoa học và Công nghệ) is a government ministry in Vietnam responsible for state administration of science and technology activities; development of science and technology potentials; intellectual property; standards, metrology and quality control; atomic energy, radiation and nuclear safety.
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.
The Vietnam Academy of Science and Technology (VAST; Vietnamese: Viện Hàn lâm Khoa học và Công nghệ Việt Nam) is the largest and most prominent research institute in Vietnam. It was founded on 20 May 1975 as the Vietnam Academy of Science , then subsequently assumed its current name in 2008.
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