MRI: Acquisition of an Isotope Ratio Mass Spectrometer (IRMS) to enable interdisciplinary research at Dartmouth and beyond

MRI：购买同位素比质谱仪 (IRMS) 以实现达特茅斯及其他地区的跨学科研究

• 批准号: 1828099
• 负责人: Caitlin Hicks Pries
• 金额: $ 33.82万
• 依托单位: Dartmouth College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-08-15 至 2021-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1828099&HistoricalAwards=false
• 关键词: MRI; Acquisition; Isotope; Ratio; Mass

An award is being made to Dartmouth College to support the acquisition of an Isotope Ratio Mass Spectrometer (IRMS) and associated equipment to measure the major stable isotopes of C, N, O, S, and H, both at natural abundance and enriched levels. The acquisition of this IRMS will make isotopic techniques more readily available to a wide range of departments at Dartmouth College and other New England colleges, which will ultimately increase faculty research productivity, undergraduate and graduate research capabilities, and the potential for interdisciplinary collaborations amongst a variety of departments and institutions. Advanced undergraduate students will have the opportunity to run the IRMS to promote STEM training and career advancement. The IRMS will be used for research that advances understanding of the global carbon cycle in the past, present, and future. Isotopic analyses have become standard in many fields of biological and geological research. Stable isotopes are used to test and make inferences about past climates and ancient carbon cycling, to understand the connections within aquatic and soil food webs, and to trace the movement of carbon, nitrogen, and contaminants from plants into soils and then into aquatic systems and the atmosphere. Researchers at Dartmouth are currently developing techniques to use carbon isotope analyses and respiration quotients to partition soil respiration into sources by specific compound classes. Such analyses have the potential to allow a more mechanistic understanding of respiration, the largest flux of carbon from the terrestrial biosphere to the atmosphere. Researchers are also working to define unique carbon and hydrogen isotopic signatures for methane produced during the breaking of carbon-phosphorus bonds to better understand methane sources in marine and lacustrine environments. Results from these research efforts will be published in peer-reviewed scientific journals, presented at scientific meetings, and used in public outreach activities.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

达特茅斯学院（Dartmouth College）颁发了奖励，以支持同位素比率质谱仪（IRM）和相关设备的获得，以衡量C，N，O，S和H的主要稳定同位素，均以自然丰富和丰富的水平为单位。获得该IRM的收购将使达特茅斯学院和其他新英格兰学院的各个部门更容易获得同位素技术，这最终将提高教职员工研究的生产力，本科和研究生研究能力，以及各种部门和机构之间跨学科合作的潜力。 高级本科生将有机会运行IRM，以促进STEM培训和职业发展。 IRM将用于研究，以提高对过去，现在和未来的全球碳循环的理解。在生物学和地质研究的许多领域，同位素分析已成为标准。稳定的同位素用于测试和推断过去的气候和古老的碳循环，了解水生和土壤食物网中的连接，并追踪碳，氮气以及从植物中的碳，污染物转移到土壤中，然后进入水生系统和大气层的运动。达特茅斯（Dartmouth）的研究人员目前正在开发使用碳同位素分析和呼吸商来通过特定化合物将土壤呼吸分配到来源的技术。 这种分析有可能使呼吸有更机械的理解，这是从陆生生物圈到大气的最大碳通量。研究人员还在努力定义在破裂碳磷键期间产生的甲烷的独特碳和氢同位素特征，以更好地了解海洋和湖泊环境中的甲烷源。这些研究工作的结果将在经过同行评审的科学期刊上发表，在科学会议上提出，并在公共宣传活动中使用。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛影响的审查标准通过评估来获得支持的。