Oxidation, Photooxidation and Photodecomposition of Dicarbonylic and Ketocarboxylic Ice Core Dopants

二羰基和酮羧酸冰核掺杂剂的氧化、光氧化和光分解

基本信息

  • 批准号:
    0228140
  • 负责人:
  • 金额:
    $ 51.43万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2002
  • 资助国家:
    美国
  • 起止时间:
    2002-12-15 至 2005-11-30
  • 项目状态:
    已结题

项目摘要

This project involves quantitative studies on the photochemistry of the carbonylic group as pertains to photodecomposition of organic contaminants in ice cores and is thereby aimed at accounting for excess carbon monoxide and carbon dioxide gas levels observed in deep ice cores. Such ambiguities may increase significantly uncertainties associated with using ice cores to study issues of importance to the relevance and representativeness of paleoclimate records. Specifically, the project will use a combination of spectroscopic techniques and chemical analyses to characterize a variety of selected ice dopants, and subsequently investigate their photochemical reactions and transformations under monochromatic light at wavelengths at and above the near-UV, and further measure gaseous formation rates in synthesized ice mixtures containing a laboratory surrogate mineral dust. This study should lead to a better understanding of photochemical processes occurring in deep ice cores and provide important data required for a scientific evaluation of the possible mechanisms of corruption of historical ice records. The fundamental nature of the research as it applies to our future understanding of the paleoclimate ice core record addresses broader scientific impacts upon geoclimate, and broader scientific community impacts are addressed through scholarship, community involvement, technology transfer and capacity-building by outreach, minority and underrepresented group involvement, as well as mentoring and research direction of young geoscientists.
该项目涉及对与冰芯中有机污染物的光分解有关的羰基的光化学进行定量研究,目的是解释在深冰芯中观察到的过量一氧化碳和二氧化碳气体水平。 这种模糊性可能会增加显着的不确定性与使用冰芯来研究问题的重要性和古气候记录的相关性和代表性。 具体而言,该项目将使用光谱技术和化学分析的组合来表征各种选定的冰掺杂剂,随后研究它们在近紫外波长及以上的单色光下的光化学反应和转化,并进一步测量含有实验室替代矿物粉尘的合成冰混合物中的气体形成速率。 这项研究应有助于更好地了解深冰芯中发生的光化学过程,并为科学评估历史冰记录可能的损坏机制提供所需的重要数据。 研究的基本性质,因为它适用于我们未来对古气候冰芯记录的理解,解决了更广泛的科学对地球气候的影响,更广泛的科学界的影响通过奖学金,社区参与,技术转让和能力建设外展,少数民族和代表性不足的群体参与,以及指导和研究方向的年轻地球科学家来解决。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)

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Michael Hoffmann其他文献

Encoding nearest larger values
对最接近的较大值进行编码
  • DOI:
    10.1016/j.tcs.2017.02.017
  • 发表时间:
    2018
  • 期刊:
  • 影响因子:
    1.1
  • 作者:
    Michael Hoffmann;J. Iacono;Patrick K. Nicholson;R. Raman
  • 通讯作者:
    R. Raman
The Mls Reaction
MLS反应
The SPOTT index: A proof-of-concept measure for tracking public disclosure in the palm oil industry
SPOTT 指数:用于跟踪棕榈油行业公开披露的概念验证措施
  • DOI:
    10.1016/j.crsust.2021.100042
  • 发表时间:
    2021
  • 期刊:
  • 影响因子:
    4.4
  • 作者:
    Philippa Oppenheimer;Elizabeth Clarke;Oliver Cupit;I. Delabre;Annabelle Dodson;Michael Guindon;Alexis Hatto;Joyce Lam;Leonie Lawrence;Clara Melot;Eleanor Spencer;Ezster Wainwright;R. Freeman;Michael Hoffmann
  • 通讯作者:
    Michael Hoffmann
Nonparametric tests for detecting breaks in the jump behaviour of a time-continuous process
用于检测时间连续过程的跳跃行为中断的非参数测试
  • DOI:
  • 发表时间:
    2014
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Axel Bucher;Michael Hoffmann;Mathias Vetter;H. Dette
  • 通讯作者:
    H. Dette
Randomised study assessing the effect of phenytoin and magnesium sulphate on maternal cerebral circulation in eclampsia using transcranial Doppler ultrasound
使用经颅多普勒超声评估苯妥英和硫酸镁对子痫孕妇脑循环影响的随机研究

Michael Hoffmann的其他文献

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{{ truncateString('Michael Hoffmann', 18)}}的其他基金

Interfacial Fenton Chemistry on Aqueous Organic Aerosols
水性有机气溶胶的界面芬顿化学
  • 批准号:
    1744353
  • 财政年份:
    2017
  • 资助金额:
    $ 51.43万
  • 项目类别:
    Standard Grant
Solid State Studies in Ceramics Gordon Research Conference, Holyoke College, MA, July 31 - August 05, 2016
陶瓷固态研究戈登研究会议,霍利奥克学院,马萨诸塞州,2016 年 7 月 31 日至 8 月 5 日
  • 批准号:
    1639791
  • 财政年份:
    2016
  • 资助金额:
    $ 51.43万
  • 项目类别:
    Standard Grant
EXP: Fostering Self-Correcting Reasoning with Reflection Systems
EXP:通过反射系统促进自我纠正推理
  • 批准号:
    1623419
  • 财政年份:
    2016
  • 资助金额:
    $ 51.43万
  • 项目类别:
    Standard Grant
Time-Resolved Electrospray Mass Spectrometric Studies of Atmospheric Gas-liquid Reactions
大气气液反应的时间分辨电喷雾质谱研究
  • 批准号:
    1238977
  • 财政年份:
    2012
  • 资助金额:
    $ 51.43万
  • 项目类别:
    Standard Grant
Collaborative Research: Heterogeneous Photocatalytic Transformation of Isoprene: Relevance to Secondary Organic Aerosol Formation
合作研究:异戊二烯的多相光催化转化:与二次有机气溶胶形成的相关性
  • 批准号:
    0964853
  • 财政年份:
    2010
  • 资助金额:
    $ 51.43万
  • 项目类别:
    Standard Grant
International Collaboration in Chemistry: Enhancing Direct Photoelectrochemical Conversion of Carbon Dioxide
国际化学合作:增强二氧化碳的直接光电化学转化
  • 批准号:
    0924597
  • 财政年份:
    2009
  • 资助金额:
    $ 51.43万
  • 项目类别:
    Standard Grant
Photochemical Cycling Between Humic-Like Substances and Simple Dicarbonylic Species in the Atmospheric Aerosol
大气气溶胶中腐殖质类物质和简单二羰基物质之间的光化学循环
  • 批准号:
    0714329
  • 财政年份:
    2007
  • 资助金额:
    $ 51.43万
  • 项目类别:
    Continuing Grant
The Acidity of the Quasi-Liquid Layers of Ice and Snow
冰雪准液态层的酸度
  • 批准号:
    0534990
  • 财政年份:
    2005
  • 资助金额:
    $ 51.43万
  • 项目类别:
    Continuing Grant
Kinetics and Mechanisms of Heterogeneous Reactions Involving Carbonyl Sulfide in Sulfuric Acid Media
硫酸介质中涉及硫化羰的多相反应动力学和机理
  • 批准号:
    9711923
  • 财政年份:
    1997
  • 资助金额:
    $ 51.43万
  • 项目类别:
    Continuing Grant
Photocatalytic Reactor Systems for Advanced Oxidation/ Reduction Processes
用于高级氧化/还原过程的光催化反应器系统
  • 批准号:
    9619885
  • 财政年份:
    1997
  • 资助金额:
    $ 51.43万
  • 项目类别:
    Continuing Grant

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CAS: CAREER: Synthetic Designs Toward Wavelength-Tunable Production of Reactive Intermediates for Selective Photooxidation
CAS:职业:用于选择性光氧化的反应中间体的波长可调生产的合成设计
  • 批准号:
    2340404
  • 财政年份:
    2024
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    $ 51.43万
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Oil Photooxidation by Sunlight: Role of Reactive Species in the Transformation of Saturated and Aromatic Hydrocarbons
阳光下的油光氧化:活性物质在饱和烃和芳香烃转化中的作用
  • 批准号:
    2203881
  • 财政年份:
    2022
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    $ 51.43万
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    Standard Grant
Formation of disulfide bonds by photooxidation at solid-liquid interface and application to photocharged secondary batteries
固液界面光氧化形成二硫键及其在光充电二次电池中的应用
  • 批准号:
    21H02052
  • 财政年份:
    2021
  • 资助金额:
    $ 51.43万
  • 项目类别:
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Laboratory Chamber Studies on Gas-Phase Photooxidation and Aqueous Chemistry of Phenols and Methoxyphenols in Biomass Burning Organic Aerosol Formation
生物质燃烧有机气溶胶形成中苯酚和甲氧基苯酚的气相光氧化和水化学的实验室研究
  • 批准号:
    2108916
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Identifying the role of dissolved organic matter composition in complete and partial photooxidation in diverse lakes
确定溶解有机物成分在不同湖泊完全和部分光氧化中的作用
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    2104716
  • 财政年份:
    2021
  • 资助金额:
    $ 51.43万
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Development of photooxidation doping technique for low dimensional organic semiconductor materials
低维有机半导体材料光氧化掺杂技术的进展
  • 批准号:
    18K04947
  • 财政年份:
    2018
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  • 项目类别:
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Collaborative Research: RUI: IRES - Track I: Brown Carbon Aerosol Formation by Photooxidation of Phenolic Compounds in Nanodroplets
合作研究:RUI:IRES - 轨道 I:纳米液滴中酚类化合物光氧化形成棕色碳气溶胶
  • 批准号:
    1825094
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    2018
  • 资助金额:
    $ 51.43万
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Collaborative Research: RUI: IRES-Track I: Brown Carbon Aerosol Formation by Photooxidation of Phenolic Compounds in Nanodroplets
合作研究:RUI:IRES-Track I:纳米液滴中酚类化合物光氧化形成棕色碳气溶胶
  • 批准号:
    1826593
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    2018
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Establishment of a Disinfection Method Applying Polyphenol Photooxidation Reaction: Toward Safer Prosthetic Treatment
建立应用多酚光氧化反应的消毒方法:迈向更安全的修复治疗
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    18K17108
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开发用于分子氧选择性光氧化的高效催化剂
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    Grant-in-Aid for Challenging Exploratory Research
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