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Preparation of sterile seawater through photodynamic action preliminary screening studies

, : Preparation of sterile seawater through photodynamic action preliminary screening studies. Florida Scientist 50(3): 168-176

Large quantities of inexpensive, sterile seawater are needed for a variety of scientific applications. A dozen organic compounds have been identified that possess the necessary properties (nontoxicity, persistence in seawater, high extinction coefficients, appropriate spectra) to exploit photodynamic action and destroy toxigenic bacteria and viruses found in seawater. These compounds were evaluated to determine their absorption by a clam (Mercenaria mercenaria) and their effectiveness toward Escherichia coli through photodynamic action. As a result of preliminary evaluation, 5 compounds expressed suitable characteristics warranting further study. These compounds killed E. coli, but did not appear to injure M. mercenaria nor were they absorbed intact by the clams. Further testing is required to establish the limits of effectiveness in sterilizing seawater through photodynamic action.

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