In order to explore the effects of high pressure processing on the extraction of essential oil rich in nootkatone, the citrus Changshan-huyou peels are used as the experiment material. Based on the single factor experiments, 4 main parameters, such as pressure (200~600 MPa), holding pressure time (5~25 min), liquid-solid ratio (10~30 mL/g) and grinding degree (20~60 mesh) are studied. Then 3 out of the 4 parameters are optimized by response surface methodology. The results can be demonstrated as follows: when the pressure, liquid-solid ratio, grinding degree are 300 MPa, 20 mL/g and 30 mesh respectively, the nootkatone content in the essential oil reaches the peak of 20.50 mg/g. The results indicate that high pressure processing can extract the noootkatone from essential oil of pomelo peel effectively. In conclusion, it is a time and energy-efficient method to extract essential oil from pomelo peel.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |