English  |  正體中文  |  简体中文  |  Items with full text/Total items : 6647/14525 (46%)
Visitors : 12511076      Online Users : 355
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: https://ir.fy.edu.tw:8080/ir/handle/987654321/9737


    Title: C-fiber-evoked autonomic cardiovascular effects after injection of Piper betle inflorescence extracts.
    Authors: Chen, S.J.;Wu, B.N.;Yeh, J.L.;Lo, Y.C.;Chen, I.S.;Chen, I.J.
    Contributors: 輔英科技大學 健康美容學位學程
    Date: 1995-03-01
    Issue Date: 2010-11-14 10:09:52 (UTC+8)
    Abstract: Piper betle inflorescence extracts contain eugenol (6.2%) and safrole (78.9%). Intravenous injections of water extracts of P. betle inflorescence (PBE), eugenol, and safrole in rats induced hypotensive and bradycardiac effects, whereas both intraarterial and intrathecal injections of PBE, eugenol and safrole resulted in hypotensive and tachycardiac effects. Moreover, the effects of intravenous injections of PBE were reversed or inhibited by the pretreatment with bilateral vagotomy, atropine (1 mg/kg, i.p.) and capsaicin (100 mg/kg, s.c.). Effects of intraarterial injections of PBE on blood pressure were inhibited by the pretreatment with substance P (SP) antagonist (1 nmol, i.t.) and clonidine (2.5 micrograms, i.t.), while heart rate was only inhibited by the pretreatment with SP antagonist (1 nmol, i.t.). In addition, the tachycardia resulting from intrathecal injections of PBE was inhibited by pretreatment with propranolol (0.3 mg/kg, i.v.). Eugenol and safrole induced the same pattern on blood pressure and heart rate changes as PBE in rats after various treatments. This report suggests that acute administration of betel inflorescence extracts by different routes may activate C-fiber-evoked parasympathetic and sympathetic cardiovascular reflexes in rats.
    Relation: J Ethnopharmacol.45(3),183-188
    Appears in Collections:[健康美容系] 期刊論文

    Files in This Item:

    File Description SizeFormat
    index.html0KbHTML681View/Open


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


    本網站典藏內容為學術研究目的之提供,請尊重著作權人之權益合理使用,請勿任意重製、轉貼、改作及散佈。

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