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Microwave irradiation of a transparent EGFP droplet placed on a liquid crystal temperature indicator with a temperature sensitivity of 25–30°C. The size of each frame is 2 × 2 cm2. Note the bright circular spot in the center of the image in panels c and d, indicating heating, and the absence of bright spot in panels a and b, indicating that the temperature rise everywhere in the drop is <1 K. The ambient temperature is 24°C.
