Collaborative Research: Changing the manganese paradigm

合作研究：改变锰范式

• 批准号: 1031200
• 负责人: Bradley Tebo
• 金额: $ 6.77万
• 依托单位: Oregon Health & Science University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1031200&HistoricalAwards=false
• 关键词: Collaborative; Research; Changing; manganese; paradigm

The project, a collaboration between investigators at the University of Delaware and Oregon Health and Science University, will develop a sensitive method for measuring the concentration of total Mn and Mn(III) at sub-nanomolar levels in ocean waters, both in oxic environments and in reduced zones. The proposed method is a modification of a published method, which has nM sensitivity. The improvement in the detection limit of this method and the demonstration of its ability to measure Mn(III) at environmental levels (0.5 nM)is the major goal of this one year project. Two different approaches will be investigated, and preliminary evidence suggests that both approaches are viable alternatives. Use of a long path optical cell will increase sensitivity of the current detection system, and preconcentration is another approach that can be used. An alternative is the use of fluorescence detection, and this will also be investigated. The various methods will be tested using referrence materials, including those collected during recent oceanographic intercalibration exercises. Additionally, the methods will be tested during short cruises and through laboratory culture experiments.Broader Impacts: Manganese redox chemistry impacts a number of global biogeochmeical cycles, and therefore understanding these interactions has broad implications. The project will train graduate students, and the results will be desseminated through a number of educational and public outreach activities. This research will continue international collaborations developed during previously funded work.

该项目是特拉华大学和俄勒冈州健康与科学大学的调查人员之间的合作，将开发一种敏感方法，用于测量在海水中的亚纳米尔水平的Mn和Mn（III）的浓度在减少区域中。提出的方法是对具有NM灵敏度的已发表方法的修改。该方法的检测极限的提高及其在环境水平（0.5 nm）中测量MN（III）的能力的证明是该项目的主要目标。将研究两种不同的方法，初步证据表明两种方法都是可行的替代方法。使用长路径光单元将增加当前检测系统的灵敏度，而预浓缩是可以使用的另一种方法。另一种选择是使用荧光检测，这也将进行研究。各种方法将使用推荐材料进行测试，包括在最近的海洋学互动练习中收集的材料。此外，这些方法将在短期巡游和实验室培养实验中进行测试。Broader的影响：锰氧化还原化学会影响许多全球生物地球化学周期，因此了解这些相互作用具有广泛的影响。该项目将培训研究生，结果将通过许多教育和公共宣传活动来取消。这项研究将继续在先前资助的工作期间发展国际合作。