Abstract
SOME unexpected results obtained on the respiration of a strain of yeast in boric acid buffers1 led us to investigate the changes in pH and in the optical rotation of glucose in boric acid and in borax solutions. In spite of the claim to the contrary2, we observed a change in the optical rotation of glucose in boric acid solutions at certain concentrations. The table below and Fig. 1 show the changes in pH. values and in []D of glucose when different amounts of boric acid (H3BO3) or borax (Na2B4O7) are added to solutions containing 10 per cent (5.55.M) glucose. The solutions were prepared 24 hours prior to observation.
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Tang, MS. sent to the J. Cell. Comp. Physiol. (1935). Tang and Lin, MS. sent to Science (1935).
Darmois and Peyroux, C.R. Acad. Sci., 193, 1182 (1931) ; and citations given by these workers.
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TANG, P., SUNG, P. Change in Optical Rotation of Glucose in Dilute Solutions of Boric Acid. Nature 137, 275 (1936). https://doi.org/10.1038/137275a0
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DOI: https://doi.org/10.1038/137275a0
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