E.H. Kampelmacher (chairman) The application of ionizing radiation is the most modern technique being used in the battle against bacterial decay and in the elimination of pathogenic microorganisms in food­ stuffs. Intensive world-wide studies have shown that this technique is effective, has no detrimental effects on human health and can be applied safely. These facts have all been confirmed recently by a Committee of experts from the World Health Organization, who have been carefully evaluating data since 1960. In spite of these convincing data, most countries do not make use of the technique ai all, and some only hesitatingly. This is mainly due to the emotional resistance of the consumer. From the start the Netherlands has made a very important contribution to the irradiation of food, through microbiological and toxicological research as well as through the setting-up of a pilot plant by the government and through the practical application of "Gammaster" on a commercial basis. The initiative of "Gammaster" to celebrate its tenth anniversary by organizing a symposium in which all aspects of food irradiation are considered is most laudable.