The book Yi Xue Shi(《医学史》History of Medicine)was written and edited by Cecilia Mettler and Fred Mettler couple,published in 1947.The book is about the literature research of systematic introduction to the history...The book Yi Xue Shi(《医学史》History of Medicine)was written and edited by Cecilia Mettler and Fred Mettler couple,published in 1947.The book is about the literature research of systematic introduction to the history of medical development worldwide.The book provides a detailed description of the development of various medical disciplines and subjects through various documents and the authors and publication dates.Especially,Prof.Mettler has introduced the Chinese Yin and Yang(阴阳)and the five element theory(五行学说)and Shen Nung’s Materia Medica(神农本草)in this book.展开更多
Air and soil pollution from traffic has been considered as a critical issue to crop production and food safety, however, few efforts have been paid on distinguish the source origin of traffic-related contaminants in r...Air and soil pollution from traffic has been considered as a critical issue to crop production and food safety, however, few efforts have been paid on distinguish the source origin of traffic-related contaminants in rice plant along highway. Therefore, we investigated metals （Pb, Cd, Cr, Zn and Cu） concentrations and stable Pb isotope ratios in rice plants exposed and unexposed to highway traffic pollution in Eastern China in 2008. Significant differences in metals concentrations between the exposed and unexposed plants existed in leaf for Pb, Cd and Zn, in stem only for Zn, and in grain for Pb and Cd. About 46% of Pb and 41% of Cd in the grain were attributed to the foliar uptake from atmosphere, and there were no obvious contribution of atmosphere to the accumulations of Cr, Zn and Cu in grain. Except for Zn, all of the heavy metals in stem were attributed to the root uptake from soil, although significant accumulations of Pb and Cd from atmosphere existed in leaf. This indicated that different processes existed in the subsequent translocation of foliar-absorbed heavy metals between rice organs. The distinct separation of stable Pb isotope ratios among rice grain, leaf, stem, soil and vehicle exhaust further provided evidences on the different pathways of heavy metal accumulation in rice plant. These results suggested that further more attentions should be paid to the atmospheric deposition of heavy metals from traffic emission when plan crop layout for food safety along highway.展开更多
文摘The book Yi Xue Shi(《医学史》History of Medicine)was written and edited by Cecilia Mettler and Fred Mettler couple,published in 1947.The book is about the literature research of systematic introduction to the history of medical development worldwide.The book provides a detailed description of the development of various medical disciplines and subjects through various documents and the authors and publication dates.Especially,Prof.Mettler has introduced the Chinese Yin and Yang(阴阳)and the five element theory(五行学说)and Shen Nung’s Materia Medica(神农本草)in this book.
基金supported by the National Science and Technology Ministry Support Program for the 11th Five- year Plan of China (No. 2007BAD89B12)
文摘Air and soil pollution from traffic has been considered as a critical issue to crop production and food safety, however, few efforts have been paid on distinguish the source origin of traffic-related contaminants in rice plant along highway. Therefore, we investigated metals （Pb, Cd, Cr, Zn and Cu） concentrations and stable Pb isotope ratios in rice plants exposed and unexposed to highway traffic pollution in Eastern China in 2008. Significant differences in metals concentrations between the exposed and unexposed plants existed in leaf for Pb, Cd and Zn, in stem only for Zn, and in grain for Pb and Cd. About 46% of Pb and 41% of Cd in the grain were attributed to the foliar uptake from atmosphere, and there were no obvious contribution of atmosphere to the accumulations of Cr, Zn and Cu in grain. Except for Zn, all of the heavy metals in stem were attributed to the root uptake from soil, although significant accumulations of Pb and Cd from atmosphere existed in leaf. This indicated that different processes existed in the subsequent translocation of foliar-absorbed heavy metals between rice organs. The distinct separation of stable Pb isotope ratios among rice grain, leaf, stem, soil and vehicle exhaust further provided evidences on the different pathways of heavy metal accumulation in rice plant. These results suggested that further more attentions should be paid to the atmospheric deposition of heavy metals from traffic emission when plan crop layout for food safety along highway.
