The mercury content of cultivated land in Guizhou is higher than other provinces in China. An investigation of the total mercury concentration of rice in Guizhou and human health risk assessment was done for the high ...The mercury content of cultivated land in Guizhou is higher than other provinces in China. An investigation of the total mercury concentration of rice in Guizhou and human health risk assessment was done for the high level of mercury in agricultural soil of Guizhou. This result can provide a scientific basis for food risk inspection management in Guizhou. The samples were detected from 9 zones in Guizhou, and all the samples were local rice. The mercury concentration in rice was detected by the atomic fluorescence spectrometry according to GB/T 5009.17-2003, and the U.S. EPA＇s health risk assessment model was used in the research. The results indicate that a maximum of 0.024 4 mg/kg in the rice samples can be detected, and the exceeding rate is 4.85%, and no mercury can be found in 22 samples. Personal lifetime risk coefficient of mercury health hazard is 1.97 ×10^-3, which belongs to the first level risk （slight risk）. It poses no risk to the exposure population.展开更多
采用顶空固相微萃取结合全二维气相色谱-质谱(Headspace solid-phase microextraction-comprehensive two dimensional gas chromatography/mass spectrometry HS-SPME-GC×GC-MS)技术,对4种保健黄酒(黄精酒、黄米酒、藜麦酒和苦荞...采用顶空固相微萃取结合全二维气相色谱-质谱(Headspace solid-phase microextraction-comprehensive two dimensional gas chromatography/mass spectrometry HS-SPME-GC×GC-MS)技术,对4种保健黄酒(黄精酒、黄米酒、藜麦酒和苦荞酒)中挥发性物质的种类、含量分进行分析,并且通过主成分分析法很好地区分不同原料的保健黄酒,找出重要的组分差异特征,探究其风味成分。结果表明,GC×GC-MS检测到4种保健黄酒中挥发性组分156种,选取匹配度大于800的挥发性组分,4种保健黄酒中共鉴定出140种挥发性组分,其中包括酯类、醇类、醛酮类、酸类、烃类、含氮化合物、苯系芳烃及其它化合物等。该方法可以通过鉴定黄酒挥发性组分,寻找挥发性组分与黄酒品质之间的关系,为保健黄酒的生产优化提供一定的理论依据。展开更多
The purpose of this study was to assess the extent of cadmium （Cd） contamination in agricultural soil and its potential risk for people. Soils, rice, and vegetables from Chenzhou City, Southern China were sampled an...The purpose of this study was to assess the extent of cadmium （Cd） contamination in agricultural soil and its potential risk for people. Soils, rice, and vegetables from Chenzhou City, Southern China were sampled and analyzed. In the surface soils, the 95% confidence interval for the mean concentration of Cd varied between 2.72 and 4.83 mg/kg （P 〈 0.05） in the survey, with a geometric mean concentration of 1.45 mg/kg. Based on the GIS map, two hot spot areas of Cd in agricultural soils with high Cd concentrations were identified to be located around the Shizhuyuan, Jinshiling, and Yaogangxian mines, and the Baoshan and Huangshaping mines, in the center of the city. About 60% of the total investigated area, where the agricultural soil Cd concentration is above 1 mg/kg, is distributed in a central belt across the region. The critical distances, at which the soil Cd concentration were increased by the mining activities, from the mines of the soils were 23 km for the Baoshan mine, 46 km for the Huangshaping mine, and 63 km for the Shizhuyuan mine, respectively. These are distances calculated from models. The Cd concentrations in rice samples ranged from 0.01 to 4.43 mg/kg and the mean dietary Cd intake from rice for an adult was 191 μg/d. Results of risk indexes showed that soil Cd concentrations possessed risks to local residents whose intake of Cd from rice and vegetables grown in soils in the vicinity of the mine was 596 μg/d.展开更多
Functional rice has functions of adjusting human physiological functions of and preventing diseases. At present,there are researches both at home and abroad about the relationship between nutritional quality and physi...Functional rice has functions of adjusting human physiological functions of and preventing diseases. At present,there are researches both at home and abroad about the relationship between nutritional quality and physiological active substances of rice and human physiological activities. Through conventional breeding,gene mutation technology,and molecular-assisted selection( MAS) technology,it is feasible to select and breed new rice varieties and plants with certain health care functions.展开更多
基金Supported by Youth Fund Key Project from Guizhou Academy of Sciences(Qiankeyuan J Hezi[2014]02)Guizhou Soft Science Research Project(Qiankehe R Zi[2014]2023)
文摘The mercury content of cultivated land in Guizhou is higher than other provinces in China. An investigation of the total mercury concentration of rice in Guizhou and human health risk assessment was done for the high level of mercury in agricultural soil of Guizhou. This result can provide a scientific basis for food risk inspection management in Guizhou. The samples were detected from 9 zones in Guizhou, and all the samples were local rice. The mercury concentration in rice was detected by the atomic fluorescence spectrometry according to GB/T 5009.17-2003, and the U.S. EPA＇s health risk assessment model was used in the research. The results indicate that a maximum of 0.024 4 mg/kg in the rice samples can be detected, and the exceeding rate is 4.85%, and no mercury can be found in 22 samples. Personal lifetime risk coefficient of mercury health hazard is 1.97 ×10^-3, which belongs to the first level risk （slight risk）. It poses no risk to the exposure population.
文摘采用顶空固相微萃取结合全二维气相色谱-质谱(Headspace solid-phase microextraction-comprehensive two dimensional gas chromatography/mass spectrometry HS-SPME-GC×GC-MS)技术,对4种保健黄酒(黄精酒、黄米酒、藜麦酒和苦荞酒)中挥发性物质的种类、含量分进行分析,并且通过主成分分析法很好地区分不同原料的保健黄酒,找出重要的组分差异特征,探究其风味成分。结果表明,GC×GC-MS检测到4种保健黄酒中挥发性组分156种,选取匹配度大于800的挥发性组分,4种保健黄酒中共鉴定出140种挥发性组分,其中包括酯类、醇类、醛酮类、酸类、烃类、含氮化合物、苯系芳烃及其它化合物等。该方法可以通过鉴定黄酒挥发性组分,寻找挥发性组分与黄酒品质之间的关系,为保健黄酒的生产优化提供一定的理论依据。
文摘The purpose of this study was to assess the extent of cadmium （Cd） contamination in agricultural soil and its potential risk for people. Soils, rice, and vegetables from Chenzhou City, Southern China were sampled and analyzed. In the surface soils, the 95% confidence interval for the mean concentration of Cd varied between 2.72 and 4.83 mg/kg （P 〈 0.05） in the survey, with a geometric mean concentration of 1.45 mg/kg. Based on the GIS map, two hot spot areas of Cd in agricultural soils with high Cd concentrations were identified to be located around the Shizhuyuan, Jinshiling, and Yaogangxian mines, and the Baoshan and Huangshaping mines, in the center of the city. About 60% of the total investigated area, where the agricultural soil Cd concentration is above 1 mg/kg, is distributed in a central belt across the region. The critical distances, at which the soil Cd concentration were increased by the mining activities, from the mines of the soils were 23 km for the Baoshan mine, 46 km for the Huangshaping mine, and 63 km for the Shizhuyuan mine, respectively. These are distances calculated from models. The Cd concentrations in rice samples ranged from 0.01 to 4.43 mg/kg and the mean dietary Cd intake from rice for an adult was 191 μg/d. Results of risk indexes showed that soil Cd concentrations possessed risks to local residents whose intake of Cd from rice and vegetables grown in soils in the vicinity of the mine was 596 μg/d.
基金Supported by Key Scientific and Technological Planning Project of Anhui Province(201503zc03029)Bozhou University-Enterprise Cooperation Technological Innovation Platform Project(2016xqzx05)
文摘Functional rice has functions of adjusting human physiological functions of and preventing diseases. At present,there are researches both at home and abroad about the relationship between nutritional quality and physiological active substances of rice and human physiological activities. Through conventional breeding,gene mutation technology,and molecular-assisted selection( MAS) technology,it is feasible to select and breed new rice varieties and plants with certain health care functions.
