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Different reagents were tested for their usefulness in detecting galegin and peganin by chemical mass selection inGalega officinalis. It was shown that galegin in lower concentrations, like those obtained by extraction from one leaf with 3 ml liquid, could not be precipitated with any amine-and alkaloid-specific reagent. Precipitation with a solution of iodine in potassium iodide proved most suitable for demonstrating the presence of peganin; the opt mal conditions for finding peganin in extracts ofGalega leaves were explored. Ways for selecting peganin-poor plants ofGalega orientalis andGalega officinalis by the precipitation of peganin with a solution of iodine in potassium iodide are discussed.

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Es werden die Analysenresultate von über tausend infrarotspek-troskopisch untersuchten Harnsteinen hinsichtlich der Häufigkeit der einzelnen Komponenten in Deutschland, Schweden und den Vereinigten Staaten von Nordamerika mit-einander verglichen. Bemerkenswert ist der relativ hohe Anteil an Harnsäuresteinen in Deutschland, besonders bei den aus Süddeutschland stammenden Konkrementen. Bei den von Kleinkindern stammenden Harnkonkrementen handelt es sich haupt-sächlich um Sekundärsteine, wodurch sich der Anteil an phosphat- und ammonium-haltigen Steinen erheblich vergröβert.

The X-ray microprobe was examined as a possible aid in the detection of salmonellae. Results obtained indicate that specific bacterial antigen (Salmonella) increased in phosphorus and sulfur after reaction with the fluorescein isothiocyanate tagged specific antibody. Nonspecific antigen (Escherichia coli) did not increase in phosphorus and sulfur after reaction with fluorescein isothiocyanate tagged anti-Salmonella antibody. The technique developed supports the hypothesis that X-ray microprobe analysis may be useful in detecting salmonellae, or other bacteria, by determining increases in the elemental constituents of bacterial cells when reacted with elemental-tagged antibodies.