History of food irradiation

Geschichte Des Getriebes

As noted in Table 18.1, the benefits of ionizing radiation have been known since 1905. In addition to its potential to irradiation can be used to eliminate pests such as the screw worm fly, which preys on cattle, the Mediterranean fruit fly, and the tsetse fly, by the release of sterile insects. Worries about nuclear weapons, combinedwithanantiprogressideology, began to hinder food irradiation research afterthe war. Althoughthere wasatthat time an adequate supply of gamma rays, the high-energy,...

Toxicants in foods and their effects on nutrition

Dibujos Depredador

Potential sources of toxicants in food include nutrients, natural food toxicants, contaminants, and chemicals or substances intentionally added to food (food additives). One usually does not relate the ingestion of a specific nutrient with concerns about the toxicity of that nutrient. However, intakes of essential dietary chemicals from zero to excessive produce responses, from lethal because of nutrient deficiency to an optimal health response and back to lethal because of intolerably high...

Products of the maillard reaction

In the Maillard reaction, reducing sugars (pentoses > hexoses) condensate with amino acids, producing a mixture of insoluble dark-brown polymeric pigments, termed melanoidins. Aldoses and ketoses react with aliphatic primary and secondary amines of amino acids and proteins to form -glycosides, which readily dehydrate to Schiff's base by the Maillard reaction (Figure 19.4). This is the basis for the well-known nonenzymatic browning reaction. In the early stages of the reaction, premel-anoidins...

Diet and biotransformation

Irradiation And Contamination

The biotransformation of a toxic compound usually, but not always, results in detoxification. It can, however, lead to the metabolic activation of foreign compounds. The effect of dietary constituents on the metabolism of foreign compounds has been the subject of intensive study for many years. More than two decades ago, the term toxicodietetics was coined for the study of dietary factors in the alterations of toxicity a term that was perhaps ahead of its time. There are a multitude of dietary...