文化大學機構典藏 CCUR:Item 987654321/19955
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    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://irlib.pccu.edu.tw/handle/987654321/19955


    题名: 葉綠素在人體血液中的研究
    作者: 陳曉瑩
    贡献者: 生物科技研究所
    关键词: 葉綠素
    脫鎂葉綠素
    脫植醇脫鎂葉綠素
    日期: 2010
    上传时间: 2011-10-27 14:08:03 (UTC+8)
    摘要: 本研究主要探討人體對葉綠素之代謝與吸收情形。本研究共招募 8 位健康受試者。每位受試者均攝取 1 公斤新鮮菠菜,於進食後 3 小時內收集血液樣品,並凍乾。血液以丙酮萃取,並將萃取液濃縮,以RP-HPLC 系統在 A445 nm 下進行葉綠素相關化合物(Chorophyll - related compounds;CRCs) 成份分析。結果顯示在人體血液中, 其CRCs 是以脫鎂葉綠素 a (Pheophytin a;Phe a) 及脫植醇脫鎂葉綠素 a (Pheophorbide a;Pho a) 形式存在。因此,推論人體可代謝並吸收經攝食獲得的葉綠素 (Chl)。

    相較於動物體內其它營養素而言,葉綠素之極性較低,因此進入動物體後,可能循脂質之代謝途徑,轉變成為脫鎂葉綠素(Pheophytin;Phe ) 及脫植醇脫鎂葉綠素 (Pheophorbide;Pho )。菠菜中 Chl a 及b 的含量約為 2.5:1。葉綠素 (Chl) 在胃中經胃液作用後,會先脫去鎂離子形成脫鎂葉綠素 (Phe),接著進入小腸被黏膜細胞吸收後,透過肝門靜脈到達肝臟,並在此與菠菜本身含有的脫植醇脫鎂葉綠素 (Pho),一起釋放至血液中,而後運送至體內其它組織及臟器。

    此研究已證實經由攝食所獲得之葉綠素可以被人體吸收,並顯示血液中主要的 CRCs 為脫鎂葉綠素 (Phe) 與脫鎂脫醇葉綠素 (Pho) 。未來將進一步探討 CRCs 在體內是否扮演特定的生物功能,並期望能架構出 CRCs 在人體完整之代謝途徑。

    The aim of this study was to find out the possibility of the
    metabolism of chlorophylls (Chls) in human. In the study, eight healthy
    subjects were recruited, and one kg of fresh spinach was consumed by
    each one. After 3 hours of consuming spinach, the blood sample from
    each subject was collected and freeze-dried.The sample was then
    extracted with acetone and concentrated, followed by analyzing
    chlorophyll - related compounds (CRCs) using high performance liquid
    chromatography. The results show that Pheophytin (Phe a) and
    Pheophorbide (Pho a) are the major CRCs in human’s blood. Metabolism
    and absorption in humans may be obtained by ingestion of chlorophylls.

    Compared with other nutrients in mammal, the polarity of Chls is
    relatively low. Therefore, Chls in mammal may be converted into Phes
    and Phos, similar to lipid metabolic pathway. The ratio of Chl a and b
    content in spinach is 2.5 to 1. Chls may be directly transformed to Phes
    in human stomach under acid environment, and then transported to
    liver and small intestine. Phes are further converted into Phos, and
    released into the bloodstream, followed by transporting to other tissues
    and organs in human.

    This study confirmed that the chlorophyll obtained by ingestion
    can be absorbed by human body. Phe and Pho are the two major CRCs
    in blood. A research related to CRCs that play specific biological
    functions and metabolic pathways in humans will be conducted in
    the near future.
    显示于类别:[生物科技研究所 ] 博碩士論文

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