Arsenic & Rice - download pdf or read online

By Andrew A. Meharg

ISBN-10: 9400729464

ISBN-13: 9789400729469

Rice is the staple foodstuff for 1/2 the world’s inhabitants. intake of rice is the main publicity course globally to the category one, non-threshold carcinogen inorganic arsenic. This publication explains the assets of arsenic to paddy soils and the biogeochemical methods and plant physiological attributes of paddy soil-rice ecosystems that bring about excessive concentrations of arsenic in rice grain. It offers the worldwide trend of arsenic focus and speciation in rice, discusses human exposures to inorganic arsenic from rice and the ensuing health and wellbeing dangers. It additionally highlights specific populations that experience the top rice consumptions, which come with Southern and South East Asians, weaning infants, gluten intolerance victims and people eating rice milk. The e-book additionally offers the knowledge of arsenic focus and speciation in different significant vegetation and descriptions techniques for decreasing arsenic in rice grain and within the human vitamin via agronomic management.

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The Bangladeshi example is interesting as it also shows a strong and significant difference between wet season (Aman) and dry season (Boro) production (Williams et al. 2006). Arsenic contaminated groundwaters are used only during the dry season, but it may be expected that there is a residual carryover to the wet season and arsenic concentrations in rice grain are 27–44% higher in dry compared to wet season. 391) in the two-way analysis of variance of the data. This is best interpreted that dry season rice cultivation raises grain arsenic levels per se (Lu et al.

Lyon. Monograph 1 Xu XY, McGrath SP, Meharg A, Zhao FJ (2008) Growing rice aerobically markedly decreases arsenic accumulation. Environ Sci Technol 42:5574–5579 Zavala YJ, Duxbury JM (2008) Arsenic in rice: I. Estimating normal levels of total arsenic in rice grain. Environ Sci Technol 42:3856–3860 Zavala YJ, Gerads R, Gürleyük H, Duxbury JM (2008) Arsenic in rice: II. Arsenic speciation in USA grain and implications for human health. Environ Sci Technol 42:3861–3866 Zhao FJ, Ma JF, Meharg AA, McGrath SP (2009) Arsenic uptake and metabolism in plants.

The total arsenic concentration of market rice from different countries of origin varies greatly with the 95th percentile of Egyptian rice, the lowest in total arsenic observed for any region to date, was below the 5th percentile for French and US rice (Fig. 4), reflecting also a tenfold range in total arsenic median concentrations. It is notable that industrialized nations have the highest ranked medians (France, USA, Spain, Italy and Japan) while developing countries had the lowest (Egypt, India, Nepal and Pakistan).

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Arsenic & Rice by Andrew A. Meharg

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