Opto—acoustic determination of absolute quantum yields in flourescent solutions von Lahmann, W., Ludewig, H.J.

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Opto-acoustic trace analysis in liquids with the frequency-modulated beam of an argon ion laser von Lahmann, W, Ludewig, H. J, Welling, H

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Biologically active secondary metabolites of endophytic Pezicula species von Schulz, B., Sucker, J., Aust, H.J., Krohn, K., Ludewig, K., Jones, P.G., Döring, D.

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