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- W2390765267 abstract "As a source of precursors in the formation of carcinogenicN-nitroso compounds, we determined the nitrate(NO3-)and nitrite(NO2)contents on foods and in portable water from Linxian county, a high incidence area of esophageal cancer. The average levels of NO-3 in 220 samples of staple foods (dry wt.) ranged from 1.516±0.885 (cornmeal) to 20, 334.924 ± 4,250.862 mg/kg ( turnipchips), and the average amounts of NO-2 in 204 food samples were from 0.131 ±0.099 (cornmeal) to 52.084± 35.003 mg/kg (turnipchips) (Table 1). NO-2 levels tended to be increased in stored foods and in those contaminated with fungi, because the microbes may reduce NO-3 to NO-2 in the moldy foods. The average contents of NO-3 109 samples and NO-2 (113 samplse) of portable water derived from ponds were 15.43±10.64 and 0.245±0.175mg/L. respectively; those from water kept in dry-wells were 14.07±9.19 and 0.246±0.172mg/L respectively; and from well water 36.37±26.24 and 0.349±0.237mg/L respectively (Table 2). Thus the well water contained higher levels of NOi and NO-2 than that from the ponds and dry-wells, and the difference was statistically significant." @default.
- W2390765267 created "2016-06-24" @default.
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- W2390765267 date "1986-01-01" @default.
- W2390765267 modified "2023-10-02" @default.
- W2390765267 title "NITRATES AND NITRITES IN FOODS AND PORTABLE WATER FROM LINXIAN" @default.
- W2390765267 hasPublicationYear "1986" @default.
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