Abstract: A dosimeter analysis system provides the capability to easily handle the radiochromic pieces of film which are commonly employed as dosimeters and make an accurate analysis of the amount of radiation received in an irradiation process. The dosimeter is constructed through use of one or more layers of a material such as paper, cardboard or non-woven material between which a piece of radiochromic film may be positioned. Through at least one of the layers, an aperture is formed which provides for the direct viewing of the radiochromic film. This dosimeter card may then be placed in a dosimeter card holder and placed in an analysis device such as a spectrophotometer. Also included on the dosimeter card may be a unique marking which provides a reference to unique information pertaining to the piece of radiochromic film employed in the dosimeter card.

Abstract: A clarifying device for use in an aquarium that includes a casing having at least one transparent portion. A plurality of clarifying pieces are confined in the casing. Each piece has a bulk density of from 0.7 to 1.3. When aquarium water flows through the casing, the clarify pieces flow in the casing and clarify the aquarium water.