{"id":50012,"date":"2021-03-05T08:24:48","date_gmt":"2021-03-05T13:24:48","guid":{"rendered":"https:\/\/dev.inrs.ca\/?p=50012"},"modified":"2021-03-08T08:45:39","modified_gmt":"2021-03-08T13:45:39","slug":"food-safety-irradiation-and-essential-oil-vapours-for-cereal-treatment","status":"publish","type":"post","link":"https:\/\/dev.inrs.ca\/en\/news\/food-security-irradiation-and-essential-oil-vapours-for-cereal-treatment\/","title":{"rendered":"Food safety: irradiation and essential oil vapours for cereal treatment"},"content":{"rendered":"\n

A combined treatment of irradiation and essential oil vapors could effectively eliminate insects, bacteria and mold in stored grains. <\/strong><\/p>\n\n\n\n

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Professor Monique Lacroix<\/a>‘s team from the Institut national de la recherche scientifique (INRS) has demonstrated the synergistic effect of this combined process on insects and mold affecting rice. The study<\/a> was published in the Radiation Physics and Chemistry<\/em><\/a> journal.<\/p>\n\n\n\n

Microorganisms and insects are the main enemies of stored grains. Currently, the food industry uses fumigants to destroy them. However, these compounds, which evaporate or decompose into gases into air or water, are threatening human health and the environment. \u201cWhen grain is fumigated, a small amount of gas is absorbed by the grain and released into the atmosphere. For food irradiation, the treatment is physical. If \u201cnew molecules\u201d are produced, they are no different than those produced by normal processes applied to food, such as heat,\u201d says Professor Monique Lacroix.<\/p>\n\n\n\n

Food irradiation refers to the exposure of food to ionizing radiation, including gamma rays and X-rays. The research team has determined the effectiveness of these two processes, both with and without essential oils.  <\/p>\n\n\n\n


Increasing radiosensitivity<\/strong><\/h2>\n\n\n\n

The study aimed at testing whether the energy level of the irradiation source with variable flow rate could affect the dose (or treatment time) needed to kill 90% of insects or molds. The research team showed that gamma rays were more effective against insects than X-rays. In addition, a higher dose rate with gamma rays proved to be more effective than a low dose rate. Moreover, by adding eucalyptus and tea tree essential oils, the effectiveness significantly improved. <\/p>\n\n\n\n

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\u201cWith the addition of essential oils, the dose needed was four to six times smaller depending on gamma dose rates. In fact, oils increase the sensitivity of insects to radiation.\u201d <\/p>Professor Monique Lacroix, expert in sciences applied to food.<\/cite><\/blockquote>\n\n\n\n

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Similar results can be seen for bacteria and moulds, even though they are more resistant to radiation. According to a previous study<\/a>, microorganisms’ sensitivity to irradiation increased by about 1.5 times with the addition of thyme and oregano essential oils.<\/p>\n\n\n\n

The team also conducted experiments with essential oil vapors diffused in 5 kg bags of rice. In the future, the team would like to test the process in an industrial setting, through partnership with companies.    <\/p>\n\n\n\n


About the study<\/strong><\/h3>\n\n\n\n

The article \u201cRadiosensitization of rice weevil Sitophilus oryzae<\/em> using combined treatments of essential oils and ionizing radiation with gamma-ray and X-Ray at different dose rates<\/a>\u201d, by Farah Hossain, Peter Follett, Shiv Shankar, Tofa Begum, Stephane Salmieri and Monique Lacroix, was published in the Radiation Physics and Chemistry<\/em> journal. The study received financial support from the Natural Sciences and Engineering Research Council of Canada<\/a> (NSERC), the Minist\u00e8re de l’\u00c9conomie et de l’Innovation<\/a> and the United States Department of Agriculture<\/a> (USDA).<\/p>\n","protected":false},"excerpt":{"rendered":"

A combined treatment of irradiation and essential oil vapors could effectively eliminate insects, bacteria and mold in stored grains, according to a study by INRS Professor Monique Lacroix. . <\/p>\n","protected":false},"author":392,"featured_media":50030,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[185,688],"tags":[],"sectors":[139,146,678,679],"class_list":["post-50012","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-innover-a-linrs","category-innover-a-linrs-en","sectors-biotechnologie","sectors-sante","sectors-biotechnologie-en","sectors-sante-en"],"acf":[],"yoast_head":"\nFood safety: irradiation and essential oil vapours for cereal treatment | INRS<\/title>\n<meta name=\"description\" content=\"A combined treatment of irradiation and essential oil vapors could effectively eliminate insects, bacteria and mold in stored 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