資料載入中.....
|
請使用永久網址來引用或連結此文件:
https://ir.cnu.edu.tw/handle/310902800/27827
|
| 標題: | Development/optimization of a green procedure with ultrasound-assisted improved supercritical carbon dioxide to produce extracts enriched in oleanolic acid and ursolic acid from Scutellaria barbata D. Don |
| 作者: | Yang, Yu-Chiao
Wei, Ming-Chi
Hong, Show-Jen
Huang, Ting-Chia
Lee, Suen-Zone |
| 貢獻者: | 環境工程與科學系 |
| 關鍵字: | Scutellaria Barbata D. Don
Oleanolic Acid
Ursolic Acid
Ultrasound-Assisted Extraction
Supercritical Carbon Dioxide Extraction |
| 日期: | 2013-08 |
| 上傳時間: | 2014-05-26 10:45:17 (UTC+8) |
| 出版者: | Elsevier Science Bv |
| 摘要: | In the present study, the evaluation of oleanolic acid (OA) and ursolic acid (UA) from Scutellaria barbata D. Don was carried out using either an ultrasound-assisted supercritical carbon dioxide (UA-SC-CO2) extraction process or a heat reflux extraction (HRE) process. The influence of different variables was investigated to evaluate their influence on the yield. A reverse-phase HPLC system coupled with a UV detector was also used to quantify the levels of OA and UA in the extracts obtained using these two techniques. The optimum conditions for UA-SC-CO2 extraction from S. barbata D. Don were as follows: mean particle size of 0.355 mm, pressure of 27.6 MPa, temperature of 55 degrees C, CO2 flow rate of 2.1 mL/min (SIP) and 14.1% (v/v) aqueous ethanol (ethanol/water = 80/20, v/v) as modifier (co-solvent) for a 50 min extraction time. With these conditions, the yield of OA was 14.142 +/- 0.583 mu g/g of dry plant and the yield of UA was 59.275 +/- 2.414 mu g/g of dry plant. This result was comparable to that obtained from HRE in 80-90% ethanol at 75 degrees C for 180 min (3 extraction cycles). The experimental results show that UA-SC-CO2 extraction saves time and energy and uses much less organic solvent. Therefore, we can conclude that UA-SC-CO2 extraction is technically feasible for the extraction of OA and UA from S. barbata D. Don. (C) 2013 Elsevier B.V. All rights reserved. |
| 關聯: | Industrial Crops And Products, v.49 n. pp.542-553 |
| 顯示於類別: | [環境工程與科學系(所)] 期刊論文
|
文件中的檔案:
| 檔案 |
描述 |
大小 | 格式 | 瀏覽次數 |
|---|
| index.html | | 0Kb | HTML | 1817 | 檢視/開啟 |
|
在CNU IR中所有的資料項目都受到原著作權保護.
|
