Acquisition of a Mass Selective Detector

要求提供财政支助，以便购买与现有气相色谱仪一起使用的质量选择检测器。所得到的气相色谱-质谱仪组合将用于植物提取物中复杂生物分子的结构测定。在结构测定中的应用包括研究质膜阿拉伯半乳糖蛋白的复杂碳水化合物部分和研究油体蛋白可能的非氨基酸成分。在检测和定量方面的应用包括测量暴露在干旱或低温胁迫下的植物和种子萌发过程中的内源植物激素。这些项目需要灵敏和定量的化学识别能力，如果没有质量选择性探测器，这是无法实现的。

Financial support is requested for acquisition of a mass selective detector to be used with an existing gas chromatograph. The resulting gas chromatograph-mass spectrometer combination would be used in structure determination of complex biological molecules in plant extracts. Applications in structure determination include studies of the complex carbohydrate portion of plasma membrane arabinogalatan-proteins and studies of possible non-amino acid constituents of oil body proteins. Applications in detection and quantitation include measurements of endogenous plant hormones in plants exposed to drought or chilling stress and in seeds during germination. These projects require capabilities of sensitive and quantitative chemical identification that cannot be achieved without a mass selective detector.