| 11. | This produces a higher graphene concentration, but removing the surfactant requires chemical treatments.
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| 12. | Scientists also are considering more conventional chemical treatments for the water.
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| 13. | Another chemical treatment involves treating with a silicon solution or calcium silicate slag.
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| 14. | No chemical treatment is applied after the carpet has been finished.
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| 15. | Some chemical treatments have not been effective in recent years.
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| 16. | Repellents, creams and other chemical treatments have been used with varying degrees of success.
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| 17. | Again, conservation groups like the GOERT view chemical treatments as an effective last resort.
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| 18. | But she said there were new chemical treatments for golf courses that minimized contamination.
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| 19. | One chemical treatment is soaking the object in a 5 % sodium sesquicarbonate solution.
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| 20. | Second, their are very effective chemical treatments for collapsing veins.
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