Photosynthesis of Carbohydrates in Vitro

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IN a recent paper on this subject,1 unsuccessful attempts by me to repeat the work of Baly2 were described. It was not mentioned, however, that consideration had been given to the possibility of the failure to detect any photosynthetical sugars being due to the adsorption of these sugars on the large surfaces exposed by the catalyst powders. The catalysts were, in fact, repeatedly examined for the presence of any organic matter. The kieselguhr supported catalysts and the nickel carbonate were, after use in the photosynthetic tests, heated for some hours with water, and also with absolute alcohol, under reflux. On subsequent evaporation of the water or alcohol, no organic residue was obtained. Tests for charring with concentrated sulphuric acid on the catalysts gave negative results.

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  1. 1

    Trans. Far. Soc., 27, 771; 1931.

  2. 2

    Proc. Roy. Soc., A 116, 197; 1927. Trans. Far. Soc., 27, 545; 1931.

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BELL, J. Photosynthesis of Carbohydrates in Vitro. Nature 129, 170 (1932) doi:10.1038/129170b0

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