Jul 02, 2021The oven-dried residue was ball milled for 12 h using a PM 100 Planetary Ball Mill (Retsch) at 600 rpm in a 50 ml vessel containing ZrO 2 balls (10 mm 10 mm). The ball-milled sample was extracted by stirring in 96% dioxane-H 2 O solution with a solid-to-liquid ratio of 1:20 (g/ml) for 24 h, then filtered, and repeated for 3 times. The solid
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