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. 2015 Dec 21;5:18435. doi: 10.1038/srep18435

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(a) Moisture-absorption ability in a saturated K₂CO₃ chamber (43% RH) at 25 °C. (b) Moisture-absorption ability in a saturated (NH₄)₂SO₄ chamber (81% RH) at 25 °C. (c) Moisture-retention ability in a silica gel chamber at 25 °C. The ability was examined gravimetrically. The graph shows data from triplicate experiments (mean ± S.D.).