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Superparamagnetic Fe 3 O 4 nanoparticles are prepared with coprecipitation method followed by modification with ammonia oleate. Magnetic P. delafieldii R-8 cells can be prepared by mixing the cells with magnetite nanoparticles. Saturated magnetization of magnetic cells is about 7.41emu/g. The pH value of magnetic suspension has significant influence on the desulfurization activity...
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