The Application of Sintered (Fritted) Glass Filters to Bacteriological Work

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Abstract
Until recently there were no filters available for bacteriological work which could be chemically cleaned as well as sterilized before use and which were adaptable to the filtration of small amounts of material. Sintered glass filters of #5 porosity presented these possibilities, if they could be relied upon to withhold bacteria. Tests were performed which showed that filters constructed of #5 porosity held back bacteria. The filters have since been employed in research and teaching work for the filtration of solutions of soluble bacterial antigens, carbohydrates, etc., and found reliable in preventing the passage of bacteria.

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