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Uptake of tetracycline (administered systemically) in a pellet of CaS/HA biomaterial placed in the abdominal muscle pouch of rats, 24 h post-administration detected using fluorescence microscopy. Yellow box (top, right) indicates the approximate region where the high magnification (bottom, right) fluorescence image was captured. Low magnification image was captured with an exposure of 1 s while the high magnification image was captured with an exposure of 200 ms.
