| http://www.w3.org/ns/prov#value | - The apparatus may include (1) a window, e.g. formed of quartz or other UV transmitting material, through which the sample may be irradiated and through which resulting radiation may be received; (2) a cavity in which the sample may be placed, the sample irradiated, and resulting radiation produced; (3) a transparent tube in which a quantity of the sample may be flowed, irradiated, and resulting ra
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