The source of HA was Merck KGaA (Darmstadt, Germany). Curry oil (CrO) was bought from the Saudi-Indica Natura Company (Jeddah, Saudi Arabia). Ashland delivered Gantrez S-97 (the acid version of methyl vinyl ether and maleic anhydride copolymer) (Tadworth, Surrey, UK). The following substances were bought from Sigma: Turmeric, Tween 80, Span 80, cremophor, isopropyl alcohol, glycerin, and ethanol (St. Louis, MO, USA). Labrasol, Lauroglycol 90, Capryol, Plurol CC49, and Transcutol were graciously provided by Gattefosse (Saint-Priest Cedex, France). The other compounds that were utilized in this experiment were all of analytical grade. Purified water was used in the experiments.
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