No abstract

Nutrient content in the skin, stem plus heart and the pulp of very immature, immature, mature, and very mature breadfruits (Artocarpus communis J.R. & G. Forst.) was studied. In most cases they were found to vary widely depending on the part and the maturity of the fruit. The major component and the principal carbohydrate in alJ three sections and at alJ stages of maturity was starch (more than 50% of the total carbohydrates). Relatively good levels of the minerals Ca, K, and Fe and the vitamins niacin and riboflavin were found in all parts at all stages of maturity. Protein content varied from 4.665.9% in the skin, 6.0-7.6% in the stem plus heart, and 3.8-4.1% in the pulp. Crude fat varied from 2.3-3.9% in the skin, 1.6-4.4% in the stem plus heart and l.l-2.6% in the pulp. Crude fiber was highest in the skin and stem plus heart and lowest in the pulp.

Tomato, pea, and New Zealand spinach plants were treated with gibberellic acid, Cycocel, and Phosfon. The tomatoes, green peas, and spinach leaves were analyzed for proteins, soluble carbohydrates, starch, ascorbic acid, niacin, β‐carotene, and titratable acidity. Cycocel and Phosfon increased proteins in all products, starch in green peas and tomatoes, and ascorbic acid in spinach and tomatoes. Cycocel increased β‐carotene in spinach and tomatoes. Phosfon increased β‐carotene in tomatoes and soluble carbohydrates in green peas and tomatoes. Gibberellic acid increased proteins, soluble carbohydrates, and ascorbic acid in all the products and starch and β‐carotene in the tomato. Gibberellic acid caused extended growth, production of smaller tomatoes and beans, and more disease‐susceptible plants. Cycocel‐ and Phosfon‐treated plants were sturdier, greener, water and insect resistant, and produced larger tomatoes or beans or thicker spinach leaves.

SUMMARY Under appropriate conditions of acid concentration, heating time and temperature of heating, the sugar alcohols react with the anthrone reagent in a quantitative manner. Suitable conditions for reproducible quantitative results are: 0.15% anthrone in concentrated sulfuric acid and a heating time of 60 min at 99°C (in a boiling‐water bath). Color measurement should be made 30 minutes after cooling the reaction tubes in an ice water bath, since the intensity of the colors increased with time. Of the various sugar alcohols tested, the order of reactivity is: Glycerol > sorbitol > mannitol > dulcitol > erythri‐tol > arabitol > ribitol > xylitol. Absorption maxima occurred at 720 mμ, for mannitol, sorbitol, and dulcitol, and at 740 mμ for erythritol. Glycerol and the other sugar alcohols exhibited no sharp absorption maxima.