Inactivation of iron dependent bacterium using visible and near infrared light
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United States of America Patent
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Feb 29, 2000
Grant Date -
N/A
app pub date -
Nov 3, 1998
filing date -
Nov 3, 1998
priority date (Note) -
Expired
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Abstract
An apparatus and process are provided for cold pasteurizing a food product such as a ground beef food product, using visible and near infrared light. The invention includes radiating the food product with pulsed near infrared light having a wavelength capable of penetrating the food product to at least about one centimeter in depth and further, radiating nonionizing radiation into the food product to inactivate bacterium, particularly iron dependent bacterium, therein. The nonionizing radiation preferably includes visible and near infrared wavelengths, with ultraviolet wavelengths filtered therefrom. The invention may further include using a pulsed heat exchanger to supercool the food product during the pulsed radiation treatment.
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