Chitosan with a low viscosity (MW 371000 determined by high-performance liquid chromatography, DD=85 determined by FT-IR) was purchased from Fluka (Tokyo, Japan). Methanesulfonic acid and phosphorus ...
“When Science Went International” (C&EN, Sept. 6, page 60) shows the 19 molecular formulas for acetic acid listed in Kekulé’s textbook of 1859 without pointing out that Josef Loschmidt was the first ...
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