Optimisation of α-pinene from Eucalyptus deglupta through hybrid drying of ultrasound assisted osmotic dehydration (UOAD) and hot-air drying
The present project will be focusing on optimizing the parameters of UOAD pre-treatment conditions to achieve a highest yield of α-pinene, total phenolic content (TPC), antioxidant and anti-inflammatory activity through response surface methodology (RSM).
Eucalyptus Deglupta or known as rainbow eucalyptus, vastly found in Philippines found is very well known for its medicinal value. α-pinene, a bioactive compound able to treat effectively treat cancer and diabetic patients is found in Eucalyptus Deglupta. Hence, the leaves of Eucalyptus Deglupta were studied for α-pinene and antioxidant activity by ultrasound pretreatment in hybrid drying. The hybrid drying opted is osmotic dehydration with hot air drying, where osmotic dehydration is coupled with ultrasound as pretreatment (UOAD), and followed by hot air drying as the next stage of drying. For this study, it is significant to determine the parameters of condition at optimizing, the parameters to be optimized are the ultrasound duration, intensity of ultrasound, temperature is and osmotic concentration. Optimization of the conditions are done based on central composite design (CCD) for research surface methodology (RSM) for maximum yield of α-pinene, total henolic content (TPC), antioxidant and anti-inflammatory activity.