MRI: Acquisition of an Isotope Ratio Mass Spectrometer for Geochemical Biological and Petrologic Research, Education and Training at Southern Illinois University

0821646 Lefticariu本提案寻求资金(69%)，用于购买IRMS系统和三台样品制备设备，用于研究、教育和培训。该仪器将支持多个学科(地质学、动物学、野生动物科学、渔业、化学、生物化学、植物生物学、人类学、煤炭研究、工程学和微生物学)。具体有：1)双进气口Thermo Delta V，2)气床II，3)EA和4)TC-EA，用于特定化合物和&amp；#61540；D分析。要解决的具体科学问题包括：辐射化学研究涉及从放射性粒子到水的能量转移的研究，获得离子形式、水合形式和自由基形式。这些氧化物种构成了化学自养的基础。这一过程可能会在氧和硫同位素分馏方面留下指纹。结果可能会带来更好的铀矿预测。伊利诺伊州是煤炭的大供应国，但硫含量相对较高(2%)。PI打算对伊利诺伊州的(C、N、H和S同位素)煤矿进行有代表性的分析。将对海底有孔虫的O和C同位素比率进行评估，并用于确定南极洲(特别是拉森冰架)的古气候指标。IRMS资源将用于元素岩石地球化学、流体包裹体测温和放射性测年。内部仪器将允许更快地产生初步数据？提供更及时的提案和论文，以及更多的研究生培训和支持。稳定碳同位素分析将应用于事件视界与北美洲次北极地区人类聚居地重合的样品。同位素将能够区分沉积记录中的天然和外星碳物种。耳石中的稳定同位素分析将被用来了解鱼类的饮食和环境历史。重点将放在农业径流对鱼类饲料的影响上。15N将被用来研究溪流中的食物网动态，它与两栖动物灭绝的关系将被阐明相对于初级植物生产者的营养结构(C3与C4)。将利用污染物中稳定同位素比率的自然变化来研究污染物的胶体/颗粒分配。管理计划将IRMS安装在SIUC质谱分析设施中。将聘请一名专职科学家来支持该仪器。行政部门已经为技术人员提供了工资支持承诺(3年)。这位科学家将负责支持仪器维护、调度、培训和协作。样本薪酬将是内部支持的一种手段。收费将根据样品预准备的程度而定。将支持课堂讲课/实验。此次收购将支持由10个不同机构支持的20个项目，这些机构跨越9个PI及其45名学生。该仪器将被纳入本科生的研究经验和SIUC-本科生研讨会计划。将向23名女生和7名代表性不足的学生提供支持。IRMS计划支持SIUC 4个系的18门课程。***

0821646LefticariuThis proposal seeks funding (69%) to acquire an IRMS system and three sample preparation peripherals for research, education and training. The instrument will support multiple disciplines (geology, zoology, wildlife science, fisheries, chemistry, biochemistry, plant biology, anthropology, coal research, engineering and microbiology). Specific are: 1) Thermo Delta V with dual inlet, 2) Gasbench II, 3) an EA and 4) a TC-EA for compound-specific and D analysis. Specific science questions to be addressed include: Radiation chemistry studies involve the study of energy transfer from radiological particles to water procuring ionic and hydrated and radical forms. These oxidizing species form be the basis of chemoautotrophy. This process may leave a fingerprint in terms of oxygen and sulfur isotope fractionation. Results may lead to better predictions for uranium deposits. Illinois is a large supplier of coal, but it is relatively high in sulfur content ( 2%). The PI intends to perform representative analyses of (C, N, H, and S isotope) Illinois coal deposits. Benthic foraminifera O and C isotope ratios will be assessed and used to define paleoclimate proxies in Antarctica (specifically the Larsen Ice Shelf). IRMS resources will be used for elemental rock geochemistry, fluid inclusion thermometry, and radiometric dating. In-house instrumentation will allow more rapid production of preliminary data ? feeding more timely proposal and paper submissions and greater graduate student training and support. Stable carbon isotope analysis would be applied to samples from the event horizon coinciding with human settlement into sub-Arctic North America. Isotopes would be able to differentiate between natural and extraterrestrial carbon species in the sedimentary record. Stable isotope analysis in otoliths will be used to understand fish diets and environmental history. Emphasis will be on the impacts of agricultural runoff on fish diets. 15N will be used to study food web dynamics in streams and its relation to amphibian extinctions Trophic structure will be elucidated relative to primary plant producers (C3 vs C4). Colloid/particle partitioning of contaminants will be studied taking advantage of the natural variations in stable isotope ratios in contaminants. The management plan the IRMS housed in the SIUC Mass Spectrometry Facility. A dedicated staff scientist will be hired to support the instrument. A salary support commitment for the technician (3 years) has been offered by the administration. The staff scientist will be responsible for supporting instrument maintenance, scheduling, training, and collaboration. Sample remuneration will be one means of in-house support. Charges will be based on the level of sample pre-preparation. In-class lecture/lab will be supported. The acquisition would support 20 projects supported y 10 different agencies spanned over 9 PIs and their 45 students. The instrument will be incorporated into Research Experiences for Undergraduates and SIUC-Undergraduate Workshop programs. Support will be given to 23 female and 7 underrepresented students. The IRMS is planned to support 18 courses within 4 departments at SIUC. ***