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.

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.

A critical study of proposed modifications of the Roe and Kuether method for the determination of ascorbic acid, with further contributions to the chemistry of this procedure.

Significance Logged tropical forests are counted as important carbon sinks in global carbon budgets due to the woody biomass they regain when they regrow following disturbance, but this assumption ignores the simultaneous carbon losses from the ecosystem. We found that, when quantifying all the source and sink terms of the ecosystem carbon budget, logged tropical forests are a net source of carbon to the atmosphere. This source persists at least 10 y following logging, meaning rates of carbon sequestration in recovering tropical forests are likely much lower than estimated.

Mary B. Mills

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.

A critical study of proposed modifications of the Roe and Kuether method for the determination of ascorbic acid, with further contributions to the chemistry of this procedure.

Tropical forests post-logging are a persistent net carbon source to the atmosphere