Vitamin Content of Peas

Abstract

many young and raised 80yG as many as those on the control diet. This performance tends t o support the growth data in that the phosphorus of the tricalcium phosphate was less available than that in the Osborne and hlendel salt mixture. At the higher phosphorus level the animals on the 0.2% fluorine phosphate produced 85% as many young as those on the control diet and raised 75% as many. The 85% value vould give this phosphate material a rating of "very good" i n relation to the Osborne arid hlendel salt mixture when appraised according t o the method of Ellis et a!. @), who rated as very good a phosphate that was SOc/, as effective as bone meal, n-hen gron-th and bone ash were the criteria. At the adequate phosphorus level, the animals on the 0 3Yc fluorine phosphatc dict produced 78% as many young a s those on the control diet and raised 93% as many. .lppnwntly when reproduction is the basis of comparison, the 0 3 7 , fluoIirie fused phosphate is a satisfactory source of phosphoruq t o rats. SUaIhIARY Ah-D CONCLUSIONS1. Eighty-mesh fused tricalcium phosphate, containing 0.2 to 0.55% fluorine, was fed at a minimal dietary phosphorus level to white rats during the 30-day period of their most rapid growth. This was found to be less assimilable than inorganic phosphate of the standard Osborne and hlendel salt misture. The difference in degree of assimilability was not manifest when the phosphorus demand of the growing animal was less-that is, during the 60and 90-day periods. The difference was less apparent also mhen the level of total phosphorus rvas raised from 0.2 to 0.47, in the breeding experiments. With such increases in phosphorus content, there were increases of 53 to SOYc in numbers born and raised on the phosphate diets.When sodium fluoride was introduced into the diet to provide a fluorine content equal to that fed as fused tricalcium phosphate, there was no detrimental effect upon gron-th of the rats to maturity or upon their bodily retention of phosphorus.3. The 80-mesh fused tricalcium phosphate containing as much as 0.3% fluorine proved as efficacious as the precipitat'ed dicalcium phosphate in the promotion of rat growth to maturity 2. and in phosphorus storage.Eighty-mesh fused tricalcium phosphate of 0.2 or 0.3% fluorine content was fcd at a 1% level, and the phosphorus con- 4.tent of the dict n a s brought to 0.4yo. The fused material proved t o be 78-857, as effective as the phosphate of an Osborne and Mendel salt mixture when effectiveness was measured by reproduction, and 75-93y0 when effectiveness Tvas measured by lactation.5. The data obtained indicate that fused tricalcium phosphate of 80-mesh, containing not more than 0.370 fluorine was virtually as effective as the control phosphate of the Oshorne and Mendel salt mixture, when evaluated by rat growth and body storngc of phosphorus during a 90-day period. When judged by reproduction and lactation, the fused phosphate proved from 75 t o 93T0 as good as the salt mixture. The results also indicate that nutritional ineffectiveness of a phospha...