基于核磁共振(nuclear magnetic resonance,NMR)技术具有无损检测结构信息的特点,利用宽带探头(broadband observe,BBO)和标准压制水峰脉冲序列zgcpfqpr(zero go composite pulse frequency presaturation),获得两种葡萄酒非目标物质信...基于核磁共振(nuclear magnetic resonance,NMR)技术具有无损检测结构信息的特点,利用宽带探头(broadband observe,BBO)和标准压制水峰脉冲序列zgcpfqpr(zero go composite pulse frequency presaturation),获得两种葡萄酒非目标物质信息,并用标准加入法检定葡萄酒中的甲醇含量,研究结果表明核磁共振可以判断两种葡萄酒中甲醇、糖度、乙酸、乳酸、柠檬酸、琥珀酸、葡萄汁液中脯氨酸等信息。展开更多
High-precision(±0.1 ppm) and high-frequency(hourly averaged) in situ measurements of atmospheric carbon dioxide(CO2) were made for the first time from August 2005 to July 2007 at Yanbian,China using a non-dispers...High-precision(±0.1 ppm) and high-frequency(hourly averaged) in situ measurements of atmospheric carbon dioxide(CO2) were made for the first time from August 2005 to July 2007 at Yanbian,China using a non-dispersive Infrared(NDIR) analyzer with National Oceanic and Atmospheric Administration/Earth System Research Laboratory(NOAA/ESRL) standards.The results of these measurements are presented in this paper and are used to investigate the regional representativeness of regional background data at Yanbian and determine the CO2 emission source regions in Northeast Asia.The phase of the monthly variations at Yanbian reflects the special regional characteristics,which were overall in excellent agreement with other observatories in the middle-to-high latitudes in the Northern Hemisphere.Applying a hybrid receptor model to the regional emission source events in cold period(November-April),we estimated the distribution of the major CO2 emissions in the northeast Asia.The results indicated that the strongest potential emission areas contributing to Yanbian are the Beijing & Tianjin metropolitan areas,southwestern part of Shandong Province including Jinan,and Vladivostok.The results of this study reveal the usefulness of in situ CO2 measurements at Yanbian in establishing the scientific foundation for monitoring the large CO2 emission areas in northern China and Russia.Continued monitoring of CO2 at Yanbian within a regional network should provide significant contributions to both understanding the global/regional carbon cycle and constraining "top-down" emissions in Northeast Asia.展开更多
文摘基于核磁共振(nuclear magnetic resonance,NMR)技术具有无损检测结构信息的特点,利用宽带探头(broadband observe,BBO)和标准压制水峰脉冲序列zgcpfqpr(zero go composite pulse frequency presaturation),获得两种葡萄酒非目标物质信息,并用标准加入法检定葡萄酒中的甲醇含量,研究结果表明核磁共振可以判断两种葡萄酒中甲醇、糖度、乙酸、乳酸、柠檬酸、琥珀酸、葡萄汁液中脯氨酸等信息。
基金supported by National Research Foundation of Korea (NRF) funded by the Korea government (MEST) (Grant No.2010-0029119)
文摘High-precision(±0.1 ppm) and high-frequency(hourly averaged) in situ measurements of atmospheric carbon dioxide(CO2) were made for the first time from August 2005 to July 2007 at Yanbian,China using a non-dispersive Infrared(NDIR) analyzer with National Oceanic and Atmospheric Administration/Earth System Research Laboratory(NOAA/ESRL) standards.The results of these measurements are presented in this paper and are used to investigate the regional representativeness of regional background data at Yanbian and determine the CO2 emission source regions in Northeast Asia.The phase of the monthly variations at Yanbian reflects the special regional characteristics,which were overall in excellent agreement with other observatories in the middle-to-high latitudes in the Northern Hemisphere.Applying a hybrid receptor model to the regional emission source events in cold period(November-April),we estimated the distribution of the major CO2 emissions in the northeast Asia.The results indicated that the strongest potential emission areas contributing to Yanbian are the Beijing & Tianjin metropolitan areas,southwestern part of Shandong Province including Jinan,and Vladivostok.The results of this study reveal the usefulness of in situ CO2 measurements at Yanbian in establishing the scientific foundation for monitoring the large CO2 emission areas in northern China and Russia.Continued monitoring of CO2 at Yanbian within a regional network should provide significant contributions to both understanding the global/regional carbon cycle and constraining "top-down" emissions in Northeast Asia.
