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jsyhn(金币+20, 翻译EPI+1):辛苦了，但你好像是直译的，这样还是不行，不好意思，表表心意，剩下的等待最优翻译了 2010-05-09 23:33:20
By comparing the Cu2+ release and the effects of urease's activity of CuO NPs and CuO MPs in two kinds of soil,combining the threshold concentration of Cu2+ which can have inhibiting action to urease's activity,we studied the mechanism of the toxic effects to soil urease's activity given by CuO NPs and CuO MPs.It showed that the Cu2+ release of CuO NPs and CuO MPs enhanced by the increasng of their concentrations, the dissolving rate was to the contrary.Both of their Cu2+ release are higher in Udic Ferrosols than Anthrosol .In the range of 1 to 100 mg • kg-1,CuO NPs had a prominent inhibiting action to urease with p ≤0.05 and highly significant action with p ≤0.01.In the same concentration,the Cu2+ release and the effects of urease's activity of CuO NPs was over to CuO MPs.In the relatively low concentration(1～10 mg • kg-1 in Udic Ferrosols and Anthrosol),the nanoparticle form resulted the inhibitorytoxicity of CuO NPs to urease's activity.In the relatively high concentration((≥50 mg • kg-1 in Udic Ferrosols,≥500 mg • kg-1 in Anthrosol),the synergy of nanoparticle form and Cu2+ release produced inhibiting action to urease's activity.Differing to CuO NPs,CuO MPs inhibited the activity of urease only through Cu2+ release,its nanoparticle form didn't have a remarkable influence.It's wroth to learn,CuO NPs had a inhibitorytoxicity in the low concentration(1 mg • kg-1) which
the submicronin form and ionic form didn't have. That showed that there was a special mechanism for the influence of CuO NPs to soil enzyme taht's wroth to do a deep study.不知道能不能帮到你 |
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