concentrate
发表于 2025-3-30 12:18:14
https://doi.org/10.1007/978-94-009-7307-7 and in tropical disease treatment, whereas bismuth compounds were widely applied as astringents and dermatological antiseptics. Arsenic derivatives were used in asthma, tuberculosis, leprosy and dermatoses (arsenic occurs in nature as a non-metal in anionic form and also as a metal in cation-ic for
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发表于 2025-3-30 15:43:22
https://doi.org/10.1007/978-94-009-7307-7t would not otherwise take place. Ostwald** was the first to emphasize that a catalyst influences the rate of a chemical reaction but has no effect on the position of equilibrium because it accelerates the forward and the reverse reactions with equal intensity. Ostwald’s famous definition was: “A ca
禁止
发表于 2025-3-30 17:14:30
https://doi.org/10.1007/978-94-009-7307-7nsional macromolecules prepared in a stepwise way from simple branched monomer units, whose nature and functionality can be easily controlled and varied. Their structure results in previously unknown or improved physical and chemical properties as compared to the common linear polymers. Dendrimers a
BOAST
发表于 2025-3-30 22:18:53
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银版照相
发表于 2025-3-31 04:45:20
https://doi.org/10.1007/978-94-009-7307-7 distance is usually needed for a proper appreciation of recent papers, the author discusses a few of them in this Chapter. The selection is very arbitrary, and limited by the author’s own interest and judgment, and the available space.
陈腐思想
发表于 2025-3-31 06:29:49
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