A leaf protein concentrate (LPC) prepared from cauliflower leaves was analysed for crude protein, calcium, phosphorus, iron, ,&carotene and some of the amino acids. Lysine and tryptophan were present in nutritionally adequate amounts, but cystine and methionine were not, Cauliflower LPC was evaluated for its nutritional qualities in respect of growth rate, protein efficiency ratio (PER), liver nitrogen, and plasma protein content by feeding rats. The growth rate of xats and PER values of leaf protein supplemented diets were better than that of the wheat flour fed group. Hence, cauliflower LPC might be used for improving nutritionally poor diets.
Three experimental diets, viz. habitually consumed diet (D1), D1 + 34 g pulses (D2), D1 + 190 ml milk (D3) were fed to 18 healthy pre-adolescent girls of low socio-economic group. The additional amount of pulses/milk provided 8 g of additional protein/day. The overall results indicate that the supplementation of habitually consumed diet with a small amount of milk greatly improved the absorption and retention of trace minerals. Minimum daily intake of Zn, Cu and Mn required to maintain equilibrium of these minerals in pre-adolescent children was calculated using the prediction equations and was found to be 8.77, 2.01 and 1.91 mg, respectively. The requirement of Fe could not be calculated due to wide variations among the subjects.
The effects of various processing methods viz. pressure cooking with soaking, sprouting (48 h), sprouting and pressure cooking, dehulling, and pressure cooking of the dehulled legume on the bioavailability of zinc were studied. The total zinc content varied from 3.28 to 3.37%; the highest being in raw ricebeans and the lowest being in dehulled, soaked and pressure cooked, and sprouted and pressure cooked ricebeans, respectively. The soluble zinc content was highest for dehulled soaked and pressure cooked ricebeans (28.2%) and lowest for raw ricebeans (16.0%). The absorption, retention, and balance of zinc were estimated in rats fed experimental and standard ZnSO4 diets using a balance study. The maximum retention of zinc was observed in dehulled soaked, and pressure cooked diets (63.37%) followed by sprouted (48 h) and pressure cooked (61.38%) diets. The gain in body weight, total femur zinc and retention of zinc in liver, kidneys and spleen were found to be highest for rats eating the sprouted pressure cooked diet followed by the dehulled, soaked and pressure cooked diet. Plasma zinc levels were found to range from 3.81 to 6.34 micromol/dl; they were maximum for rats fed the dehulled, soaked and pressure cooked diet. It can be concluded that dehulling significantly improves the availability of zinc and germination of ricebeans is the best method to enhance the zinc availability.
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