No abstract

The effective ion sizes of the quaternary bromide and picrate in chlorobenzene are about one ángstróm unit smaller than in a number of other solvents; this result indicates that specific interaction between solvent and solute can appear even in the case of strong electrolytes.Schenectady, N. Y.

Previously Harris, Wissmann, and Greenlie ( 1940) reported the results of an extended series of determinations which showed that high humidity and low air movement caused considerable improvement in the maintenance of ascorbic acid (vitamin C ) dnring refrigerated storage. Six vegetables stored at 65 per cent relative humidity and with an air movement averaging approximately 10 fe'et per minute showed 64 per cent greater destruction of ascorbic acid than when stored at 93 per cent relative humidity with an air movement averaging approximately two feet per minute. Results were also given of preliminary experiments using bioassay methods which indicated that vitamin A (more correctly provitamin A ) was better preserved in vegetables when stored under these conditions. The present paper is a report of an intensive study using lettuce as a typical important vegetable to determine more accurately the effect of humidity and air movement on the preservation of its provitamin A. EXPERIMENTAL PROCEDUREThe two refrigerators used in this study were identical with the two types used previously. The cabinet of the conventioiial refrigerator ( A ) had a relative humidity which averaged 69 per cent, while the food compartment of the special refrigerator (11) averaged 88 per cent. On the floors of both refrigerators there were pairs of covered "hydrators," designed for use in the household in the storage of fragile vegetable foods.The relative humidities were determined with four electrically operated psychrometers located (No. 1) in the center of the floor of the right hydrator, (No. 2) on a platform in the center of the lower shelf of Refrigerator A and in the same location in (No. 3 ) the right hydrator, and (No. 4 ) on a platform in Refrigerator 11. Temperature measurements were by thermocouples placed beside psychrometers No. 2 and No. 4. Publication KO. 191 from

The melting points, percentage yields, and analytical results for the eleven new hydantoins prepared have been collected in Table III. Summary 1.sym-Di-allyloxypropanol and three representatives of the sym-alkoxypropanol series have been prepared, one of which, the sym-di-n-heptyloxypropanol, has not been previously reported in the literature.2. Three new members of the sym-dialkoxypropanone type of compounds have been prepared, and, in addition, the sym-diallyloxypro-panone has been synthesized-not, however, in an analytically pure state.3. Two new members of the «wvywz-dialkoxypropanol series have been synthesized and adequately characterized.4. Attempts to obtain pure unsym-dialkoxypropanones resulted in failure.5. Utilizing the series of ten sym-dialkoxypropanones and sym-diallyloxypropanone, Bucherer's method has been extended by the synthesis of eleven hydantoins of a new type. Austin, Texas

THE nutritional value of phosphorus varies with the type of compound to which it is bound. Because of these differences, in working with plant materials, especially grains, an accurate method is needed for the determination of the peculiar type of phosphorus which prevails to the extent of 70 to 90 per cent in grains and seeds.In nature this so-called phytin phosphorus presumably occurs as sodium and magnesium salt of inositol hexaphosphoric acid, though Posternak (6) has suggested that the sodium-calcium salt occurs in nature, with the formula CeHeC^PeCaíNas• 3H20. Both Anderson (1) and Posternak have prepared phytic acid, CeHisChiPe, from various plant materials. It seems likely, therefore, that phytin phosphorus occurs as some salt of inositol hexaphosphoric acid (phytic acid).