EA: Peripheral Replacements for the Northwestern University Stable Isotope Biogeochemistry Laboratory

EA：西北大学稳定同位素生物地球化学实验室的外围设备更换

• 批准号: 2335204
• 负责人: Magdalena Osburn
• 金额: $ 24.05万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-03-15 至 2025-02-28
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2335204&HistoricalAwards=false
• 关键词: EA; Peripheral; Replacements; Northwestern; University

Light stable isotopes of elements including carbon (C), nitrogen (N), oxygen (O), hydrogen (H) and sulfur (S) provide records of their behaviors in biological and geological systems. Measurements of these isotopes are made to investigate land use, constrain modern climate change, unravel microbial metabolic pathways, understand biogeochemical cycling through critical time periods in Earth History, and reconstruct past environmental changes. This award funds the acquisition of instruments to maintain and expand analytical capabilities at the Northwestern Stable Isotope Biogeochemistry Laboratory (NU-SIBL), a core research facility used by Earth scientists at Northwestern University as well as across the country. Active NSF-funded grants which will be supported by this acquisition include an isotope informed paleoclimate reconstruction and proxy calibration of the Younger Dryas in Greenland, investigation of carbon cycling and sedimentation in intensively managed landscapes, characterization of microbial food webs using C, N, and H isotopes of biomass,, and interrogation of deep subsurface microbe-rock-fluid interactions. The equipment replacement and upgrade permit current and future isotope-based research within NU-SIBL as well as carry on the strong history of student training in this shared laboratory. This award funds the replacement of two peripheral instruments within the Northwestern University Stable Isotope Biogeochemistry Laboratory (NU-SIBL) including a Gas Chromatograph with combustion and pyrolysis interfaces and an Elemental Analyzer, as well as a water purification system for sample preparation. These instruments will replace nearly 15-year-old obsolete versions that have been used extensively and productively by faculty, students and collaborators in addition to external users nationally and internationally. The Gas Chromatograph system will be used to analyze compound-specific isotopic (C, H, N) composition of organic materials including plant waxes, microbial lipids, methane, and amino acids. The elemental analyzer will be used for bulk measurement of organic C, N, and S, as well as inorganic S. Funds from this award will also support direct participation high school interns to stable isotope research in cooperation with NU-Geopaths, an outreach program run by the Department of Earth and Planetary Sciences that exposes high school students from diverse backgrounds to geoscience research.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.

碳(C)、氮(N)、氧(O)、氢(H)和硫(S)等元素的光稳定同位素记录了它们在生物和地质系统中的行为。对这些同位素的测量是为了调查土地利用，限制现代气候变化，揭示微生物代谢途径，了解地球历史上关键时期的生物地球化学循环，并重建过去的环境变化。该奖项用于购买仪器，以维持和扩大西北稳定同位素生物地球化学实验室(NU-SIBL)的分析能力，NU-SIBL是西北大学和全国的地球科学家使用的核心研究设施。此次收购将支持由NSF提供的活跃赠款，包括利用同位素信息对格陵兰较年轻的仙女木进行古气候重建和代理校准，对密集管理景观中的碳循环和沉积进行调查，使用生物量的C、N和H同位素表征微生物食物网，以及询问深层地下微生物-岩石-流体相互作用。设备的更换和升级允许在NU-SIBL内进行当前和未来的基于同位素的研究，并在这个共享的实验室中进行强大的学生培训历史。该合同用于更换西北大学稳定同位素生物地球化学实验室(NU-SIBL)内的两台外围仪器，包括一台带有燃烧和热解界面的气相色谱仪和一台元素分析仪，以及一套用于样品制备的水净化系统。这些仪器将取代已有近15年历史的过时版本，这些版本已被教职员工、学生和合作者以及国内外外部用户广泛而富有成效地使用。气相色谱系统将用于分析有机物质的特定化合物同位素(C，H，N)组成，包括植物蜡、微生物脂类、甲烷和氨基酸。元素分析仪将用于有机C、N、S以及无机S的批量测量。该奖项的资金还将支持直接参与的高中实习生与NU-Geopath合作进行稳定同位素研究。Nu-Geopath是地球和行星科学部运营的一个扩展项目，让来自不同背景的高中生接触地球科学研究。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。