1. Aerogels by themselves are hydrophilic, but chemical treatment can make them hydrophobic. 2. In addition, public acceptance of a new, widespread chemical treatment was lacking. 3. Either heating or some combination of chemical treatments and filtering is necessary. 4. Chemical treatment is problematic, since you probably use the rosemary in cooking.5. More ecologically-friendly means are being tested as an alternative to chemical treatments . 6. There was no chemical treatment to further improve the taste or appearance. 7. The lake also had nuisance aquatic weed growth that has required chemical treatment . 8. Some chemical treatment techniques include ozone and oxygen gas injection, chemical precipitation, nanomaterials. 9. The second stage is the actual tawing and other chemical treatment . 10. Chemical treatments are often used in enclosed storage areas with little air circulation.
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