论文部分内容阅读
THE QUANTIFICATION OF HUMAN CHORIONIC GONADOTROPIN BY TWO ISOTOPE DILUTION MASS SPECTROMETRY METHODS
【机 构】
：
Division of Chemical Metrology and Analytical Science,National Institute of Metrology,Beijing 100029
【出 处】
：
第十六届北京分析测试学术报告会
【发表日期】
：
2015年期
其他文献
Tillage practices play an important role in the sustainable agriculture system.Conservative tillage practice can help to reduce soil erosion,increase soil f
会议
Soil Structure Dynamics:Evidence from Bulk Density and Water Retention Characteristics during Wettin
The structure and pore related functions of a tilled soil layer vary dynamically under the impact of wetting and drying(WD)cycles.Our objective in this stud
会议
Utopus:a novel autonomous robot that uses renewable energy to cultivate soil without causing compact
Cultivation,seeding and weed control are fundamental to arable production.In the developed world these activities use increasingly large machinery with tyre
会议
会议
Soil is one of the most critical life-supporting compartments of the Biosphere.It provides numerous ecosystem services such as a habitat for biodiversity,wa
会议
Chinas economy underwent great changes since 1949,especially since China initiated economic reforms and the open-door policy in the 1980s.The growth of agri