文献类型： 外文期刊

第一作者： Falandysz, Jerzy

作者： Falandysz, Jerzy;Falandysz, Jerzy;Falandysz, Jerzy;Wang, Yuanzhong;Saniewski, Michal;Fernandes, Alwyn R.

作者机构：

关键词： Human exposure; Foodstuffs; Fungi; Macromycetes; Nutritional content

期刊名称：JOURNAL OF FOOD COMPOSITION AND ANALYSIS （ 影响因子：4.556； 五年影响因子：4.89 ）

ISSN： 0889-1575

年卷期： 2020 年 91 卷

页码：

收录情况： SCI

摘要： A number of wild, edible mushroom species (Baorangia bicolor, Boletus calopus, Boletus obsclereumbrinus, Butyriboletus roseoflavus, Rubroboletus sinicus, Rugiboletus extremiorientalis and Xerocomus sp.) were collected in 2017, from Yunnan (Yuxi prefecture) in SW China. Samples of raw and stir-fried pools of these specimens were analysed for radioisotopes Cs-137 (caesium) and K-40 (potassium), and for total K concentrations. On a whole (wet) weight (ww) basis, Cs-137 activity ranged from < 0.10 to 0.75 Bq kg(-1) for raw, and from 0.5 to 4.4 Bq kg(-1) in stir-fried mushrooms. Radiopotassium (K-40) activity ranged from 57 to 96 Bq kg(-1) ww for raw, and 170 to 370 Bq kg(-1) ww for stir-fried mushrooms, while the corresponding concentration ranges for total K were 2100-3400 mg kg(-1) ww (mean: 2800 +/- 3900 mg kg(-1) ww), and 6000-13000 mg kg(-1) ww-(mean: 8700 +/- 2100 mg kg(-1) ww), respectively. This data indicates that mushrooms from this region show negligible Cs-137 contamination with evidently higher activity levels of K-40. The deep oil stir-frying process results in enrichment in the resulting meals for all three determinants. 100 g meal portions showed Cs-137 activity in the range < 0.08 to 0.44 Bq 100 g(-1) ww (mean 0.15 +/- 0.12 Bq 100 g(-1) ww), and K-40 activity from 16 to 37 Bq 100 g(-1) ww (mean 24 +/- 6 Bq 100 g(-1) ww). The consequent exposure from K-40 contained in a single 100 g serving and weekly (100 g x7) servings was equivalent to radiation doses in the range of 0.099 to 0.23 mu Sv and 0.68-1.6 mu Sv per capita (means 0.15 +/- 0.04 and 1.1 +/- 0.3 mu Sv). This is equivalent to doses in the range of 0.0017 to 0.0038 mu Sv kg(-1) bm day(-1) and 0.011 to 0.027 mu Sv kg(-1) bm week(-1) respectively (mean values of 0.0025 +/- 0.006 mu Sv kg(-1) bm day(-1) and 0.018 +/- 0.004 mu Sv kg(-1) bm week(-1)). Analogically to the annual Cs-137 radiation exposure resulting from high rates of annual consumption (20-24 kg per capita), the estimated annual dose of radiation from K-40 would range from 0.34 up to 0.92 mu Sv kg(-1) bm (mean 0.60 mu Sv kg(-1) bm). Thus in practice, high annual consumption rates of wild, stir-fried mushrooms as seen in Yunnan, would result in negligible internal doses from decay of artificial Cs-137, relative to that from natural K-40. The 100 g servings also contained between 590-1300 mg K making this local food one of the top dietary sources of nutritionally important potassium for local consumers.

分类号：