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vol. 11, nr. 2 (2008)
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Relation between microwave radiation and nitrate content in potato tubers during their storage
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Tomasz Jakubowski
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Department of Food Engineering, Faculty of Agricultural Engineering, Agricultural University, ul. Balicka 116B, 30-149 Kraków |
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vol. 11 (2008), nr. 2,
pp. 411-418
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abstract:
The purpose of the study was to determine the relation between microwave radiation and storage time, and nitrate content in potato tubers. Material under investigation were potato tubers of very early Aster and Felka varieties, originating from crops in field conditions. Weight of each tuber was determined immediately after harvest. Then, the tubers were put in a 100 W and 1000 W microwave field. A microwave generator working at the frequency of 2.45 GHz was used in the tests. Single potato tubers were put in the hermetic generator chamber for 10 sec. Total radiation doses ranged from 1000 to 10000 J, corresponding to 11.5-325.0 J g-1 of unit microwave radiation doses. Substantial relations were found between the content of nitrates in potato tubers of Felka and Aster varieties, their storage period, and the effect of microwave radiation. Potato tubers of Felka and Aster varieties put in microwave field ranging from 11.5 to 107.6 J g-1 of unit doses showed lower nitrate content as compared to control samples. When compared to Felka variety, Aster variety showed stronger reaction to microwave field by lowering nitrate content in tubers after the storage period.
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keywords:
potato, microwave radiation, nitrates, storage
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original in:
Polish
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