Abstract
Using paper chromatographic and radioactive tracer methods, the products formed when aqueous solutions of carbohydrates are irradiated with ionizing radiations are identified and quantitatively estimated. In dilute aqueous solutions D-glucose is degraded to D-glucuronic acid, glyoxal, D-arabinose, D-erythrose, formaldehyde, saccharic acid and 1 : 3-dihydroxyacetone, which have been estimated quantitatively. By following the yield-dose curves for the main products, the primary and secondary products are distinguished, and the main types of degradation identified. The main products formed during the irradiation of aqueous dextran solutions are glucose, isomaltose, isomaltotriose, gluconic acid, glucuronic acid, glyoxal, erythrose and glyceraldehyde. These products are considered to arise from at least two independent processes. The main attack when D-sorbitol solutions are irradiated with γ-rays is located at the primary alcohol groups in the molecule. The primary products are D-glucose and L-gulose, and appreciable amounts of D-arabinose and L-xylose were formed by secondary attack. A possible mechanism for the process is suggested.
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