EmulsionsSkin Irritancy TestsNanomedicineVetiveriaNanoparticlesParticle SizeFluorocarbonsNanocapsulesDrug StabilityHair PreparationsDiarylheptanoidsSkin AbsorptionOilsNanostructuresDrug Delivery SystemsEstersPlant OilsPiroxicamDrug CarriersPlant GumsSurface-Active AgentsNanotechnologyUltrasonic TherapyDrug CompoundingAdministration, TopicalWaterSurface PropertiesRats, Wistar