It is proposed to describe briefly the rise in popularity of the tomato during the 20th century to become the world's fourth most significant fruit, making an important contribution to human nutrition. The grading standards for fruit used in various major tomato-producing countries will be outlined. A major part of the review will be devoted to describing changes in composition during the maturation, ripening, preservation, and storage of good quality tomatoes especially as regards carbohydrates, organic and amino acids, proteins, steroids, pigments, minerals, and the lipids, volatiles, and other minor constituents. A range within which composition should normally fall will be given. Additionally, the effects on composition of environment, cultivar, nutrition, and physiological disorders inter alia will be described. How new growing methods and genetic manipulation could influence the tomato of the future will also be considered.

The constituents of tomato fruit — the influence of environment, nutrition, and genotype

Ascorbic acid in aromatic hydroxylation. I. A model system for aromatic hydroxylation.

One of the earliest attempts to gauge the involvement of ascorbic acid (AA) in the overall metabolism was thc determination of its distribution in thc tissues. A thorough knowledge of its occurrence was believed to be pertinent to the elucidation of the physiological role of the vitamin in the organism. The availability of labeled AA, metabolites, and analogues has made it possible to follow up the appearance of these compounds or mctabolites thereof in thc various tissues of animals by means of dissecting the animals with subsequent determination of the radioactive material accumulated by the tissues or by means of whole-body autoradiography, as described in detail by Kalberer.'

Distribution of ascorbic acid, metabolites and analogues in man and animals.

Implication of an increased oxidative stress in the formation of advanced glycation end products in patients with end-stage renal failure

An improved method for determination of l-ascorbic acid and l-dehydroascorbic acid in blood plasma

The determination of diketo l-gulonic acid, dehydro-l-ascorbic acid, and l-ascorbic acid in the same tissue extract by the 2, 4-dinitrophenylhydrazine method.

Charlotte M. Damron

Papers

The determination of diketo l-gulonic acid, dehydro-l-ascorbic acid, and l-ascorbic acid in the same tissue extract by the 2, 4-dinitrophenylhydrazine method.

Metabolism of l-ascorbic acid, dehydro-l'ascorbic acid, and diketo-l-gulonic acid in the guinea pig.