Food_Irradiation_09 - Food Irradiation Food Irradiation A...

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Food Irradiation Food Irradiation
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Food Irradiation Food Irradiation A food preservation technology Reduces food losses due to spoilage Improves shelf-life Dose dependent * Inactivates enzymes * Destroys spoilage bacteria * Destroys pathogenic bacteria
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Food Irradiation Food Irradiation Historical Perspectives Historical Perspectives 1895 Discovery of X-rays by Röentgen. 1906 First patent issued in England to increase the keeping quality of foodstuffs using radiation from radon.
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Food Irradiation Food Irradiation Historical Perspectives Historical Perspectives 1921 U.S. patent for using X-rays to control Trichinella spiralis in pork. 1930 French patent for the use of high energy radiation for food preservation. 1943 Beginning of toxicological and shelf life studies of irradiated foods.
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Food Irradiation Food Irradiation Historical Perspectives Historical Perspectives 1958 First commercial application of irradiation of spices in Germany. 1963 U.S. Government approves the use of irradiation to control insect infestation of wheat and wheat flour. 1964 U.S. Government approves the use of irradiation to inhibit sprouting in potatoes.
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Definition of Terms Definition of Terms Radiation - Refers to waves or rays in the electromagnetic spectrum: Is usually classified according to frequency. Irradiate - To illuminate or shed light upon; to cast splendor or brilliancy upon; to penetrate by radiation.
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Ionizing Radiation Ionizing Radiation Ionizing Radiation - Capable of knocking electrons out of their normal orbits in atoms or molecules The atom or molecule is no longer electrically neutral and goes looking for another electron to balance itself out Ions or free radicals are intermediate stages of most reactions that occur routinely in nature
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The effect of these reactions: The effect of these reactions: Inhibit sprouting Retard ripening Damages DNA of contaminating organisms * parasites * bacteria * insects * mold spores * insect larvae * viruses
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How does radiation kill a cell?
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Food_Irradiation_09 - Food Irradiation Food Irradiation A...

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