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johnson_g

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应助: 5 (幼儿园)
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虫号: 616765
注册: 2008-10-04
专业: 胶体与界面化学

[交流] 【请教】关于一句话的翻译

原文是这样的：This example illustrates the phase transfer of hydrophobized gold nanoparticles with CTAB molecules at the chloroform-water interface and then the phase transfer of gold nanoparticles in the aqueous phase. In a typical experiment, 25 mL of hydrophobized Au (dodecyl amine, octadecyl amine, octadecathiol etc. capped) nanoparticles in chloroform was added to 25 mL of 10.sup.-3 M CTAB solution in water. The concentration of gold in chloroform was estimated to be 2.times.10.sup.-4 M by UV-vis.spectroscopy. Vigorous shaking of the biphasic mixture resulted in phase transfer of the gold nanoparticles from chloroform to water, giving a pink, foam-like appearance to aqueous layer. This layer was then separated from the organic layer, dried and the resulting dry powder redispersed in 25 mL of double-distilled water.
其中红色标出来的这句话是什么意思？该怎样理解？
“10.sup.-3 M“和“2.times.10.sup.-4 M by UV-vis.spectroscopy. ”具体是什么意思？
谢谢

[ Last edited by 大笨猪和聪明羊 on 2008-12-18 at 08:11 ]

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