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研究生:藍培軒
研究生(外文):Lan, Pei-Xuan
論文名稱:應用多波長奈秒螢光生命週期技術之光合作用中光保護分子機制檢測儀之系統開發
論文名稱(外文):Development of a multi-wavelength fluorescence lifetime system for monitoring photosynthesis activities
指導教授:陳怡君陳怡君引用關係
指導教授(外文):Chen, Yi-Chun
口試委員:陳怡君張宜仁曾盛豪
口試委員(外文):Chen, Yi-ChunChang, Yi-RenTseng, Sheng-Hao
口試日期:2017-08-28
學位類別:碩士
校院名稱:國立交通大學
系所名稱:影像與生醫光電研究所
學門:工程學門
學類:生醫工程學類
論文種類:學術論文
論文出版年:2017
畢業學年度:106
語文別:中文
論文頁數:44
中文關鍵詞:光合作用螢光生命週期綠藻葉綠素螢光
外文關鍵詞:PhotosynthesisFluorescence lifetimegreen algaechlorophyll a
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藻類為未來生質能源的重要來源之一,而控制藻類培養環境,尤其是照光條件,可以有效提升其光合作用效率以及藻類生長速率。常見量測光合作用效率的方式,是利用葉綠體中的葉綠素a螢光強弱,判斷光合作用的狀態,並藉此找到最佳的藻類培養條件。然而,對於光合作用這類複雜系統,螢光的光強訊號往往難以定量,更無法區分出不同生化反應路徑所產出的訊號。本研究應用發光二極體,開發一套多波長奈秒解析螢光生命週期量測系統,應用於量測藻類葉綠素a的螢光生命週期訊號。本研究的目的包含:利用不同波長之量測光,區分不同色素分子所對應的光合作用反應路徑;同時,應用螢光生命週期搭配螢光光強訊號,解析各個反應路徑之生化狀況。本論文中使用的多色發光二極體,搭配自行設計的發光二極體驅動電路,此螢光生命週期量測架構可以有效提高發光二極體的射頻調變深度以及調變頻率,成功解析奈秒等級的螢光生命週期訊號。為了快速切換多波長激發光,在論文中自行設計發光二極體之切換電路。此研究中,量測不同光強但相同波長之激發光、以及相同光強但不同波長激發光的照明之下,活體藻類細胞的葉綠素a螢光生命週期變化,及葉綠素a螢光動態曲線,並討論其相闗的光合作用光保護機制。
Green algae is one of the most important source of biomass and biofuel. It has been known that culture condition, especially illumination light, decides photosynthesis efficiency hence the yield of biomass in green algae. Conventional instruments to monitor photosynthesis activities measure Chlorophyll a fluorescence intensity. However, as a very complex system, it is difficult to quantitatively identify photosynthesis reactions based on Chlorophyll a fluorescence intensity solely. In this thesis, I developed a nanosecond-resolved multi-wavelength fluorescence lifetime system, and applied this fluorescence lifetime system to study photosynthesis activities of green algae in vivo. In my lifetime system, the wavelength of illumination light excites different light-absorbing pigments in photosynthesis, therefore provides information on their corresponding pathways. Then, the state of each pathway can be evaluated by fluorescence lifetime in combination with fluorescence intensity. In my study, a multi-die light-emitting diode (LED) was used as the light source. The LED was modulated at radio frequency by signals from a field-programmable gate array (FPGA). I designed a switching circuit to address individual die on the multi-wavelength multi-die LED. This system was applied to measure Chlorophyll a signals of green algae in vivo. In the experiments, I changed either the wavelength or the intensity of activation light that excited Chlorophyll a, and I observed different fluorescence lifetime components and different dynamic decay curve of fluorescence intensity under different light condition. Related non-photochemical quenching pathways was discussed in this thesis.
摘要 I
ABSTRCT II
誌 謝 III
目 錄 IV
表目錄 V
圖目錄 VI
第一章 緒論 1
1.1 背景 1
1.2 動機 5
第二章 實驗原理與架設 6
2.1 螢光生命週期量測技術 6
2.2 極座標圖分析法 8
2.3 螢光生命週期量測系統架構 8
2.4 訊號產生和處理區塊 9
2.5訊號放大區塊 10
2.6 切換區塊 11
2.7 光路區塊 12
第三章 實驗結果 14
3.1小球藻培養條件以及樣品製備 14
3.2系統校正 15
3.3小球藻量測之實驗設計 16
3.4實驗結果 17
3.5小球藻內加入二氯苯基二甲脲 33
3.6使用連續量測光去量測小球藻之螢光生命週期 35
第四章 結果與討論 37
4.1螢光生命週期起始點不同 37
4.2 PSMT曲線狀態下之狀態改變之預測 37
4.3綠藻之狀態回復效率 40
第五章 結論 41
參考文獻 42
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