An article from Science News Jan 2021
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Abscisic acid
A major plant hormone that plays an important role in plant growth and development. Abscisic acid (ABA), with a chemical formula of C15H20O4 (Fig. 1), is one of the most significant hormones found in plants. It is responsible for regulating various…
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Aluminum alloys
Substances formed by the addition of one or more elements, usually metals, to aluminum. The principal alloying elements in aluminum-base alloys are magnesium (Mg), silicon (Si), copper (Cu), zinc (Zn), and manganese (Mn) [Fig. 1]. In wrought…
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Amsler-Laffon, Jakob (1823–1912)
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Arkwright, Richard (1732–1792)
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Armstrong, William George (1810–1900)
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Auer, Carl
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Ayrton, Hertha (Phoebe Sarah) Marks (1854–1923)
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Ayrton, William Edward (1847–1908)
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