English  |  正體中文  |  简体中文  |  Items with full text/Total items : 17776/20117 (88%)
Visitors : 10863040      Online Users : 527
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/27847

    標題: Extraction of protocatechuic acid from Scutellaria barbata D. Don using supercritical carbon dioxide
    作者: Yang, Yu-Chiao
    Wei, Ming-Chi
    Huang, Ting-Chia
    Lee, Suen-Zone
    貢獻者: 環境工程與科學系
    關鍵字: Scutellaria Barbata D. Don
    Protocatechuic Acid
    Supercritical Carbon Dioxide Extraction
    Ultrasound-Assisted Extraction
    日期: 2013-09
    上傳時間: 2014-05-26 10:46:06 (UTC+8)
    出版者: Elsevier Science Bv
    摘要: The use of supercritical carbon dioxide (SC-CO2), with water as a modifier, was evaluated in this study as a method to extract protocatechuic acid (PA) from Scutellaria barbata D. Don. The highest extraction yield of PA, 64.094 +/- 2.756 mu g/g of dry plant, was achieved at 75 degrees C and 27.5 MPa, with the addition of 15.6% (v/v) water as a modifier. The mean particle size was 0.355 mm, the CO2 flow rate was 2.2 mL/min (STP) and the dynamic extraction time was 100 min. At pressures of 16.2-30.0 MPa and temperatures of 45-75 degrees C, the mole fraction solubilities of PA in SC-CO2 ranged from 2.829 x 10(-7) to 9.631 x 10(-7). The solubility data for PA fit well in the Chrastil model. It is evident that the SC-CO2 extraction uses less solvent, saves both energy and time and is an environmentally friendly extract technology that can be used in the food, cosmetic and pharmaceutical industries. (C) 2013 Elsevier B.V. All rights reserved.
    關聯: Journal of Supercritical Fluids, v.81, pp.55-66
    Appears in Collections:[環境工程與科學系(所)] 期刊論文

    Files in This Item:

    File Description SizeFormat
    310902800_27847.pdf866KbAdobe PDF700View/Open

    All items in CNU IR are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback