李源弘臺灣大學:材料科學與工程學研究所林武慶Lin, Wu-ChingWu-ChingLin2007-11-262018-06-282007-11-262018-06-282005http://ntur.lib.ntu.edu.tw//handle/246246/55239本研究利用市面上最熱門的左旋維他命C來探討其和蒙脫石複合以後,對左旋維他命C安定性和毒性測試,大多數對於左旋維他命C(L-ascorbic acid)之相關研究,多是以高分子劑型方式來開發,藉由利用蒙脫石特有之層間特性,探討出合適左旋維他命C-蒙脫石複合物,並試圖找出左旋維他命C插入或吸附於蒙脫石之最佳條件,再經由SEM、XRD、FT-IR光譜解析,深入探討蒙脫石之插入行為,並以麵包酵母菌為指標針對複合物做毒性測試,比較蒙脫石/左旋C複合物、蒙脫石、左旋C三者之劑量響應關係,就EC50而言,蒙脫石/左旋C複合物毒性是最小,EC0方面,蒙脫石/左旋C複合物之抗菌力是最佳的,綜合以上結果,以利後續進行載體控制釋放之可行性分析。 先前研究中發現,蒙脫石(montmorillonite)天然複合物噴灑於九層塔植物葉片上具有防止葉片黃化及間接防治蟲害之作用。為深入瞭解其機制(如:施灑後之殘留毒性),本研究取定指標微生物之枯草菌(Bacillus subtilis CCRC 14714)來進行生物毒性分析。利用蒙脫石之各種配方複合物組合為介質來監測其微生物生長反應行為,並定義出劑量-響應曲線求出有效劑量值(例如:EC0, EC50),後再與典型農藥(如Lannate , C5H10N2O2S)作毒性對照比較,另一方面,枯草菌與麵包酵母菌之劑量響應曲線作對照,觀察兩者之類比平行毒性關係。In this study, we used the famous cosmetics “L-Ascorbic acid” to mix with montmorillonite, and then observed the stability of L-ascorbic acid and tested the toxicity. Recently, many people have studied on the L-ascorbic acid, but most of them are developed with polymer type. By using the laminar property of montnorillonite, we can synthesize the proper L-ascorbic acid/montmorillonite composites. However, we can try to find the best formula for the intercalation of the L-ascorbic acid, and then experiment with SEM, XRD and FT-IR. After we understood the intercalation, we tested the toxicity of the hybrid (montmorillonite/L-ascorbic acid, montmorillonite, L-ascorbic acid) for Saccharomyces cerevisiae by dose-response analysis. The toxicity of montmorillonite/L-ascorbic acid is the lowest for EC50, and the anti-bacterium of montmorillonite/L-ascorbic acid is best for EC0. To sum up, it could be feasible to use the montmorillonite as the drug-carrier. As indicated previously, montmorillonite composites sprayed on Qcimum basilicum L. leafage could prevent leaves from opaque yellow and indirectly keep the worm away. To understand the mechanism, we used, Bacillus subtilis, to be our experimental model to analyze the toxicity. We administrated with different doses of montmorillonite to observe the growth behavior of microorganism. After that, we defined the dose-response curve (EC50, EC0 e.t.c.), and compared with typical pesticide (ex. Lannate). On the other hand, we compared the dose-reponse curves of Bacillus subtilis with Saccharomyces cerevisiae, and observed the parallel toxic relationship.目錄 中文摘要 Ⅰ 英文摘要 Ⅲ 目錄 Ⅳ 圖索引 Ⅶ 表索引 ⅩⅡ 第一章、緒論 1 1.1 前言 1 1.2 研究目的 3 第二章、理論基礎 5 2.1 蒙脫石的結構性質與應用 5 2.1.1 蒙脫石之製備與改質 5 2.1.2 膨潤土之晶格結構理論及空間群 6 2.1.3 蒙脫石之應用 14 2.2左旋維他命C 16 2.2.1左旋維他命C簡介與理化性質 16 2.2.2 維他命C之旋光性 18 2.2.3 維他命C氧化作用與安定性 20 2.2.4 左旋維他命C之生理功能 24 2.2.5 左旋維他命C性能與用途 25 2.3 毒性指標微生物—麵包酵母菌(Saccharomyces cerevisiae)與枯草菌(Bacillus subtilis) 26 2.3.1 麵包酵母之特性與簡介 26 2.3.2 枯草桿菌在植物病害防治上之應用 28 2.3.3 枯草桿菌之作用機制 29 2.3.4 微生物的生長模型 32 2.4 Probit model 之原理 33 2.5 X光繞射原理 37 第三章、實驗設備與步驟 40 3.1 實驗儀器 40 3.2 實驗藥品 44 3.3 實驗方法及流程 45 3.3.1蒙脫石/左旋維他命C複合物之製作 45 3.3.2枯草菌之培養 47 第四章:結果與討論 49 4.1 蒙脫石之表面形貌與成份分析結果 49 4.2蒙脫石/蒙脫石複合物之XRD分析 52 4.3蒙脫石/蒙脫石複合物之FT/IR分析 55 4.4添加物對枯草菌生長機制之影響 58 4.4.1 枯草菌於固定蒙脫石添加量及不同鐵氰化鉀之生長曲線與比生長速率 58 4.4.2 劑量-反應分析(Dose-response Analysis) 68 第五章、結論 80 第六章、未來之展望 82 參考文獻 842874190 bytesapplication/pdfen-US蒙脫石黑色素枯草菌麵包酵母菌劑量-響應分析Lannate左旋維他命CMontmorilloniteMelaninBacillus subtilisSaccharomyces cerevisiaeDose-response analysisL-ascorbic acid左旋維他命C-蒙脫石奈米黏土複合物:合成與毒性研究L-ascorbic acid-montmorillonite Nanocomposite: Synthesis and Toxicitythesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/55239/1/ntu-94-R92527003-1.pdf