生物制药翻译，此句中的against如何理解？

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.

“对着”的意思？？