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
Kinetic experiments of gas generation for typical samples of marine gas precursors including low-maturity kerogen,residual kerogen and oil as well as dispersed liquid hydrocarbon(DLH)in source rocks were performed by ...Kinetic experiments of gas generation for typical samples of marine gas precursors including low-maturity kerogen,residual kerogen and oil as well as dispersed liquid hydrocarbon(DLH)in source rocks were performed by closed system,and the evolution trends of molecular and isotopic compositions of natural gases from different precursors against the maturity(R0%)at laboratory conditions were analyzed.Several diagrams of gas origin were calibrated by using the experimental data.A diagram based on the ratio of normal and isomerous butane and pentane(i/nC4-i/nC5)was proposed and used to identify the origins of the typical marine natural gases in the Sichuan Basin and the Tarim Basin,China.And the maturities of natural gases were estimated by using the statistical relationships between the gaseous molecular carbon isotopic data and maturities(δ13C-R 0%)with different origins.The results indicate that the molecular and isotopic compositions of simulated gases from different precursors are different from each other.For example,the dryness index of the oil-cracking gas is the lowest;the dryness indices of gases from DLH and kerogen in closed system are almost the same;and the dryness index of gases from residual kerogen is extremely high,indicating that the kerogen gases are very dry;the contents of non-hydrocarbon gases in kerogen-cracking gases are far higher than those in oil-cracking and DLH-cracking gases.The molecular carbon isotopes of oil-cracking gases are the lightest,those of kerogen in closed system and GLH-cracking gases are the second lightest,and those of cracking gases from residual kerogen are the heaviest.The calibration results indicate that the diagrams of ln(C1/C2)-ln(C2/C3)andδ13C2-δ13C3-ln(C2/C3)can discriminate primary and secondary cracking gases,but cannot be used to identify gas origin sources,while the diagram of i/nC4-i/nC5 can differentiate the gases from different precursors.The application results of these diagrams show that gas mixtures extensively exist in China,which involved the gases from multiple precursors and those from different maturity stages.For example,marine gases in the Sichuan Basin involve the mixture of oil-cracking gases and high-over-maturated kerogen gases,while those in the Tarim Basin involve not only the mixture of gases from multiple precursors,but also those from different maturity gases and post-reservoir alternations such as oxidized degradation and gas intrusion processes.展开更多
Amid the recent global upsurge of studies on the philosophy of emotion, a reinterpretation of traditional Confucian philosophy, especially Mencius＇s ideas on the siduan （Four Original Sources） of morality, may shed...Amid the recent global upsurge of studies on the philosophy of emotion, a reinterpretation of traditional Confucian philosophy, especially Mencius＇s ideas on the siduan （Four Original Sources） of morality, may shed new light on the subject in comparative philosophy. This paper probes the structure of moral feeling and reason described by Mencius＇s from five perspectives： （1） In view of the relationship between feeling and reason, is it better to use the expression ＂siduan＂ or the expression ＂sixin （Four Heart-minds）＂？ （2） In view of dispositional feeling, what are the four original sources？ （3） In view of moral feeling, what are the structural order of the four sources and the corresponding procedure of reasoning of four heart-minds of Humanity？ （4） In view of positive feeling, how does moral feeling grow out of the goodness of human nature？ （5） What is the global value of Mencius＇s ideas on human moral feeling？ The author concludes that Mencius＇s thought on moral feeing has a global value and cross-cultural significance, and that Chinese wisdom is more than regional but universally applicable. The structure of moral feeling and reason that Mencius identified is in accordance with the principles ofzhiliang （grasping the two poles of the beginning and the end） and yongzhong （emloying the middle）. The principles ofzhiliang and yongzhong are true universal wisdoms of Confucianism, which should be rekindled today. From a practical point of view, ＂the Way begins from moral feelings,＂ and Confucius and Yah Hui＇s seeking the simple, virtuous life is an ideal model of emotional well-being.展开更多
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
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.
基金the National Basic Research Program of China(Grant No.2007CB209501,2001CB209101)Knowledge Innovation Project of the ChineseAcademy of Sciences(Grant No.KZCX2-YW-108,KZCX3-SW-224)
文摘Kinetic experiments of gas generation for typical samples of marine gas precursors including low-maturity kerogen,residual kerogen and oil as well as dispersed liquid hydrocarbon(DLH)in source rocks were performed by closed system,and the evolution trends of molecular and isotopic compositions of natural gases from different precursors against the maturity(R0%)at laboratory conditions were analyzed.Several diagrams of gas origin were calibrated by using the experimental data.A diagram based on the ratio of normal and isomerous butane and pentane(i/nC4-i/nC5)was proposed and used to identify the origins of the typical marine natural gases in the Sichuan Basin and the Tarim Basin,China.And the maturities of natural gases were estimated by using the statistical relationships between the gaseous molecular carbon isotopic data and maturities(δ13C-R 0%)with different origins.The results indicate that the molecular and isotopic compositions of simulated gases from different precursors are different from each other.For example,the dryness index of the oil-cracking gas is the lowest;the dryness indices of gases from DLH and kerogen in closed system are almost the same;and the dryness index of gases from residual kerogen is extremely high,indicating that the kerogen gases are very dry;the contents of non-hydrocarbon gases in kerogen-cracking gases are far higher than those in oil-cracking and DLH-cracking gases.The molecular carbon isotopes of oil-cracking gases are the lightest,those of kerogen in closed system and GLH-cracking gases are the second lightest,and those of cracking gases from residual kerogen are the heaviest.The calibration results indicate that the diagrams of ln(C1/C2)-ln(C2/C3)andδ13C2-δ13C3-ln(C2/C3)can discriminate primary and secondary cracking gases,but cannot be used to identify gas origin sources,while the diagram of i/nC4-i/nC5 can differentiate the gases from different precursors.The application results of these diagrams show that gas mixtures extensively exist in China,which involved the gases from multiple precursors and those from different maturity stages.For example,marine gases in the Sichuan Basin involve the mixture of oil-cracking gases and high-over-maturated kerogen gases,while those in the Tarim Basin involve not only the mixture of gases from multiple precursors,but also those from different maturity gases and post-reservoir alternations such as oxidized degradation and gas intrusion processes.
文摘Amid the recent global upsurge of studies on the philosophy of emotion, a reinterpretation of traditional Confucian philosophy, especially Mencius＇s ideas on the siduan （Four Original Sources） of morality, may shed new light on the subject in comparative philosophy. This paper probes the structure of moral feeling and reason described by Mencius＇s from five perspectives： （1） In view of the relationship between feeling and reason, is it better to use the expression ＂siduan＂ or the expression ＂sixin （Four Heart-minds）＂？ （2） In view of dispositional feeling, what are the four original sources？ （3） In view of moral feeling, what are the structural order of the four sources and the corresponding procedure of reasoning of four heart-minds of Humanity？ （4） In view of positive feeling, how does moral feeling grow out of the goodness of human nature？ （5） What is the global value of Mencius＇s ideas on human moral feeling？ The author concludes that Mencius＇s thought on moral feeing has a global value and cross-cultural significance, and that Chinese wisdom is more than regional but universally applicable. The structure of moral feeling and reason that Mencius identified is in accordance with the principles ofzhiliang （grasping the two poles of the beginning and the end） and yongzhong （emloying the middle）. The principles ofzhiliang and yongzhong are true universal wisdoms of Confucianism, which should be rekindled today. From a practical point of view, ＂the Way begins from moral feelings,＂ and Confucius and Yah Hui＇s seeking the simple, virtuous life is an ideal model of emotional well-being.
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.
