Tubes were centrifuged at 3000 x g for 20 min, the supernatant was decanted, and the tubes were allowed to drain for 10 min at a 45o angle. The residue was weighed and WHC and OHC calculated as g water or oil per g dry sample, respectively .
Tubes were centrifuged at 3000 x g for 20 min, the supernatant was decanted, and the tubes were allowedto drain for 10 min at a 45o angle. The residue wasweighed and WHC and OHC calculated as g wateror oil per g dry sample, respectively .