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.

达特茅斯学院获得一项奖励，用于支持购买同位素比质谱仪 (IRMS) 和相关设备，以测量 C、N、O、S 和 H 的主要稳定同位素，包括自然丰度和富集水平。收购该 IRMS 将使达特茅斯学院和其他新英格兰学院的各个院系更容易使用同位素技术，这最终将提高教师的研究生产力、本科生和研究生的研究能力以及各学科之间跨学科合作的潜力。的部门和机构。 高年级本科生将有机会运行 IRMS，以促进 STEM 培训和职业发展。 IRMS 将用于增进对过去、现在和未来全球碳循环的理解的研究。同位素分析已成为生物和地质研究许多领域的标准。稳定同位素用于测试和推断过去的气候和古代碳循环，了解水生和土壤食物网内的联系，并追踪碳、氮和污染物从植物进入土壤，然后进入水生系统和土壤的运动。气氛。达特茅斯的研究人员目前正在开发利用碳同位素分析和呼吸商将土壤呼吸按特定化合物类别划分为多个来源的技术。 此类分析有可能使人们对呼吸作用有更机械的理解，呼吸作用是从陆地生物圈到大气的最大碳通量。研究人员还致力于定义碳-磷键断裂过程中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来源。这些研究工作的结果将在同行评审的科学期刊上发表，在科学会议上展示，并用于公共宣传活动。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响进行评估，被认为值得支持审查标准。