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Paradigm 2: pouch: Au NPs + SF volume (10 W, 30 s time intervals). Optical images of the observed change in the surface area of l-alanine crystals in a plastic pouch containing different volumes of Au NPs (10, 50, and 100 μL; no SF) (A) or different volumes of SF (10, 50, and 100 μL; no Au NPs) (B) during 120 s (at 30 s time intervals) of microwave heating at 10 W.
