Highly sensitive Faraday balance for magnetic susceptibility studies of dilute protein solutions
Highly sensitive Faraday balance for magnetic susceptibility studies of dilute protein solutions
复制标题
用于稀蛋白质溶液磁化率研究的高灵敏度法拉第天平
DOI：
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发表时间：
1985
期刊：
影响因子：
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通讯作者：
A. Ehrenberg
中科院分区：
文献类型：
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作者：
L. Petersson;A. Ehrenberg
建立了一个高灵敏度的法拉第天平。它被设计用于精确测量稀蛋白溶液的顺磁化率。我们特别注意样品的处理。目前可以在10 - 200k的温度范围内进行测量。对于0.1 ml样品体积，测得的体积敏感性的再现性在45 K以上为2×10−10 emu/cm3，在10 - 45 K温度范围内为4×10−10 emu/cm3。迄今为止，该仪器已被应用于研究某些含铁或含铜蛋白质中的反铁磁相互作用，以及高自旋含铁蛋白质中的电子零场分离。
A highly sensitive Faraday balance has been constructed. It has been designed for accurate measurement of paramagnetic susceptibility of dilute protein solutions. Particular attention has been paid to sample handling. Measurements can at present be made within the temperature range 10–200 K. The reproducibility in measured volume susceptibility, for a 0.1‐ml sample volume, is 2×10−10 emu/cm3 above 45 K and 4×10−10 emu/cm3 in the temperature range 10–45 K. The instrument has so far been applied to studies of antiferromagnetic interaction in some Fe‐ or Cu‐containing proteins and of electronic zero‐field separations in a high‐spin Fe(II)‐containing protein.