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A. D. Levin A. V. Aseichev O. A. Azizova E. M. Bekman V. V. Vysotskii O. Ya. Uryupina V. I. Roldughin 《Colloid Journal》2010,72(1):23-30
Regularities of changes in resonance light scattering spectra of silver nanoparticles due to their interactions with protein molecules are studied. This effect can be used to identify biological molecules and elucidate their modification, in particular those due to oxidative processes, using optical techniques. 相似文献
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In order to study the effect of substitution of Fe3+ by Al3+ and Cr3+ in Li0.5Fe2.5O4 on its structural and magnetic properties, the spinel system Li0.5Al x Cr x Fe2.5?2x O4 (x=0.0, 0.2, 0.4, 0.5, 0.6 and 0.8) has been characterized by X-ray diffraction, high field magnetization, low field ac susceptibility and 57Fe Mossbauer spectroscopy. Contrary to the earlier reports, about 50% of Al3+ is found to occupy the tetrahedral sites. The system exhibits canted spin structure and a central paramagnetic doublet was found superimposed on magnetic sextet in the Mössbauer spectra (x>0.5). 相似文献
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联苯胺分光光度法测定食盐中碘含量 总被引:2,自引:0,他引:2
基于在盐酸介质中,碘酸钾氧化联苯胺使其显色,提出了光度法测定食盐中微量碘的方法。在40℃的水浴中,当2 mol.L-1盐酸溶液用量为1.00 mL0、.42 g.L-1联苯胺溶液用量为0.80 mL时,方法的线性范围为100~1 400μg.L-1,最大吸收波长在425 nm处,表观摩尔吸光率为1.4×105L.mol-1.cm-1。用于测定加碘食盐中碘含量的测定,回收率在97.5%~101.2%之间,相对标准偏差(n=7)在0.9%~1.9%之间。 相似文献