Two hundred grams of soybean seeds (moisture contents of 7.4, 15.3, 22.5, and 30.5%) were irradiated at dose levels of 0, 1, 5, 10, 20, 40, 60, 80 and 100 KGy using Cobalt-60 source. Radiation dose of 100 KGy caused a decrease in the percentage of nitrogen solubility from 80.3 to 67.2, 80.3 to 57.8, and 68.1 to 48.8 when deionized H20, 0.6M NaCI, and 0.2M Caclz were used as solvents, respectively. Inhibition of 71% of lipoxygenase activities, 25.4% trypsin inhibitor activities, and 16.7% chymotrypsin inhibitor activities were found when the soybean seeds were irradiated at 100 KGy.

Vitamin A status was assessed in a randomly selected group of neonates at delivery. A total of 105 neonates were included in the study. Cord vitamin A concentration was determined by high performance liquid chromatography (HPLC). Of 105 neonates, 53 (50.5 per cent) were males and 49 49.5 per cent) were females. The mean body weight of male neonates was slightly greater that that of female neonates (3271 +/- 575 vs. 3139 +/- 552 g). Mean cord plasma vitamin A level of the males was significantly lower (p < 0.05) than that of the female neonates (12.2 +/- 4.6 and 14.7 +/- 5.2 micrograms/100 ml respectively). The mean body weight of premature neonates (2186 +/- 530 g) was significantly lower (p < 0.05) compared with the mean body weight of full term neonates (3279 +/- 495 g). Cord plasma of preterm neonates had mean value of vitamin A significantly lower (p < 0.05) than full term neonates (8.3 +/- 3.2 vs 13.8 +/- 4.5 micrograms/100 ml). A trend of increasing birth weight with increasing cord plasma vitamin A level was evident.

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Microwave heating of soybeans for 9 min decreased protein solubility from 80 to 17%, from 81 to 18%, and from 72 to 16% when deionized HzO, 0.6N NaCl and 0.4N CaCl, were used as solvents, respectively. Experiments were conducted to determine 'in viva protein digestibility and metabolizable nitrogen using male SpragueDawley rats. The percentages of true digestibility were found to be 73, 84, 87 and 81 when the soybeans were microwave heated for 0, 9, 12 and 15 min, respectively. Microwave heating soybeans up to 15 min did not alter the fatty acids composition of the beans.

The vitamin and mineral content of mature breast milk from 54 Saudi mothers was examined. All measurements of vitamins A, E, B, and B 2 in milk were determined by HPLC. Minerals were determined by Atomic Absorption Spectrophotometry. The mean vitamin A concentration in milk was 82.01 ± 35.9 µg/100 ml. Milk vitamin E, B 1 and B 2 concentrations were 0.84 ± 0.70, 0.027 ± 0.005 and 0.02 ± 0.003 mg/100 ml respectively.

The present study was conducted to provide the anthropometric measurements and energy intake of male university students. Edible plate waste was assessed. A total of 90 male students participated in the anthropometric study. Meal and edible plate waste were analyzed for their contents of moisture, crude protein, crude lipid, ash and fiber. Total carbohydrates were calculated by difference. Total served meals and edible plate waste were assessed quantitatively using a weight technique. Total energy intake was 85% of the RDA. The students had higher intakes of protein and fat and lower intakes of carbohydrate than the recommended levels. The collected data showed that plate waste was influenced by the timing of the meal. Plate waste was higher for dinner (39.74%) and lower for lunch (22.67%).

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