Acquisition of a Scanning Electron Microscope at Mount Holyoke College

[0216182dunn]这项主要研究仪器（MRI）资助通过购买带有低真空样品室和能量色散光谱仪的新型扫描电子显微镜（SEM）来支持Mount Holyoke学院科学教师的研究需求。新的环境扫描电镜（JEOL JSM-5610）将取代已有17年历史的现有JEOL 35 CF扫描电镜，后者缺乏光束稳定性、图像质量以及对水合或未涂层样品成像的能力。包括生物、化学和地球科学在内的多个部门的教师都在从事研究，这些研究将充分利用最先进的ESEM。需要对材料进行高分辨率结构和成分分析的具体研究包括：海洋无脊椎动物（轮尾纲、Copepoda和枝角纲）的分类研究、乳胶涂层工业材料的研究、变质过程中石墨-方解石碳同位素交换的研究（作为变质组合形成温度的代表）、富铁地幔相的成分制图，以更好地了解深部地球化学动力学和氧化还原条件。以及农业工程作物的分类调查。该设施还将扩大霍利奥克山著名的女性教育项目的可用资源。＊＊＊

0216182DunnThis Major Research Instrumentation (MRI) grant supports the research needs of Mount Holyoke College science faculty through acquisition of a new scanning electron microscope (SEM) with a low-vacuum sample chamber and energy-dispersive spectrometer. A new environmental SEM (JEOL JSM-5610) will supercede an existing JEOL 35 CF SEM that is 17 years old and lacks beam stability, image quality and the capability to image hydrated or uncoated samples. Faculty from multiple departments including biology, chemistry and the earth sciences are all engaged in research that will make excellent use of a state-of-the-art ESEM. Specific studies that require high resolution textural and compositional analysis of materials include, taxonomic investigations of marine invertebrates (Rotifera, Copepoda and Cladocera), studies of latex coated industrial materials, studies of graphite-calcite carbon isotopic exchange during metamorphism as a proxy of the temperature of formation of metamorphic assemblages, compositional mapping of Fe-rich mantle phases to better understand deep earth chemical dynamics and redox conditions, and taxonomic investigations of agriculturally-engineered crops. This facility will also expand the resources available to Mount Holyoke's renowned educational program for women. ***