主题:【求助】生物制药翻译,此句中的against如何理解?

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xubiaobo
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The oxidized saccharide is then concentrated and diafiltered against WFI on a 100 kDa MWCO ultrafilter.

参考译文
然后将获得的氧化糖浓缩并通过100 kDa MWCO超滤器渗滤注射用水
然后,在100 kDa MWCO超滤器上用WFI浓缩和渗滤氧化糖

本人觉得两种翻法都有问题,请大家帮帮忙!
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poorlittle
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Whould the oxidized saccharide be finally used for injection?
If so, please consider whether the 8th meaning below is appropriate:



From http://www.thefreedictionary.com/against

a·gainst

prep.

1. In a direction or course opposite to: row against the current.

2. So as to come into forcible contact with: waves dashing against the shore.

3. In contact with so as to rest or press on: leaned against the tree.

4. In hostile opposition or resistance to: struggle against fate.

5. Contrary to; opposed to: against my better judgment.

6. In competition with: race against the record holder.

7. In contrast or comparison with the setting or background of: dark colors against a fair skin.

8. In preparation for; in anticipation of: food stored against winter.

9. As a defense or safeguard from: protection against the cold.

10. To the account or debt of: drew a check against my bank balance.

11. Directly opposite to; facing.



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