An ultrasonic probe includes a plurality of transducers arranged in XY directions, a plurality of backing members stacked along the X or Y direction, in back of the transducers, and a plurality of heat conductive sheets sandwiched between the plurality of backing members and higher in heat conductivity than the backing members.

 
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< Substrate having catalyst compositions on surfaces of opposite sides

> Illuminating devices employing titanium dioxide photocatalysts

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