A golf ball composed of a solid core of at least one layer and a cover of at least one layer is characterized in that the solid core or an inner cover layer adjacent to an outer cover layer has a color difference .DELTA.E with a ball surface of at most 30, and at least the outer cover layer is transparent or translucent and made of a resin material that includes an interference pigment in which color develops through an interference effect by reflected light. The golf ball is stylish and has a high-quality feel, yet also has an excellent scuff resistance.

 
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> System to enhance the photocatalytic oxidation rate of contaminants through selective desorption of water utilizing microwaves

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