快速檢定抗生素對細菌生物膜敏感性之新技術
The purpose of this study is to set up a quick, easy and economical way to evaluate the ability of different concentration of various antibiotics to penetrate biofilm and establish the antimicrobial susceptibility patterns of various antibiotics. The susceptibility of five antibiotics upon sessile cultures of Bacillus subtlis ATCC 6633, Escherichia coli XL, Pseudomonas aeruginosa ATCC 27853, Staphylococcus aureus ATCC 29213 and Sarcina lutea ATCC 9341 were measured ATCC 27853, and S. aureus ATCC 29213 proved to be very difficult to eradicate, with only Gentamicin proving to effective at achievable drug concentrations, but the S. lutea ATCC 9341 biofilm was the most susceptible to the Penicillin. The results demonstrated that for biofilms of the same organisms, several hundred to thousand times the concentration of a certain antibiotic were often required for the antibiotic to be effect, while other antibiotics were found to be effective at the MICs. The concentration of antibiotic to penetrate the biofilm is proportional to the thickness of biofilm. Indeed, our research have already indicated that the use of MIC values to indicate antibiotics effectiveness is misleading, because MIC values can not represent the actual effect of anticbiotics on microbiologicals that have developed biofilm. The antimicrobial susceptibility patterns of antibiotics to various bacterial biofilm are different. The susceptibility of the mixed biofilm depends on the physical and biological change of biofilm. Our biofilm device offers a new technology for the rational evaluation of antibiotics effective against microbial biofilms and for the screening of new effective antibiotic drugs.此研究之目的是要建立一套操作簡便、快速且費用低廉之生物膜厚度產生方法，藉此探討不同生物膜厚度對抗生素抗菌之影響，進而完成抗生素對生物模之抗菌圖譜。本實驗將測試五種抗生素Bacillus subtilis ATCC6633，Escherichia coli XL，Pseudomonas aeruginosa ATCC27853，Staphylococcus aureus ATCC29213和Sarcina lutea ATCC9341之抗菌圖譜。試驗結果顯示Gentamicin對前四株試菌有較佳之穿透力，對S.lutea ATCC 9341則是Penicillin。實驗結果證明最小抑制濃度值確實無法實際有效地表達對已形成生物膜菌體之抗菌效果，要完全去除生物膜之抗生素濃度是為最小抑制濃度之數百倍到數千倍，而且抗生素用藥濃度隨著生物膜厚度增加而成比例增加。不同抗生素對不同菌株生物膜有不同之抗菌圖譜，混合菌株生物膜是否會促進或抑制抗生素之穿透力，端視其生物膜結構有無改變。本實驗方法可以做為一種快速檢定抗生素對細菌生物膜敏感性之新技術，同時亦可有效地篩選新的抗生素藥物對生物膜的抗菌效應。
AI 演化技術
此研究之重點在於如何建構一套人工智慧方法，人工智慧含多種進行方式，例如以類神經網路訓練近似於人腦之結構，而專家系統係於不同的科學領域內以自己之所知判斷。我們先以 John Holland 的 Genetic Algorithm （暫譯基因演算法，以下暫稱GA）的理論來實作出一套人工智慧系統之方法。Genetic Programming 係以ＧＡ為基礎之實作方法，主要的內容不出基本的演化定義；在這次的試驗中，首要為先定出程式欲演化成何種類型，在此我們先定義為排序型的演算法，經過分析實際程式之結構後定出適合基因元件的資料結構，分化為兩個部份進行，一為產生器，亦為突變，交配器，一為評審程式，亦為執行器，兩者使用相同之基本元件，再以不斷的交配和突變以達到全域最佳化。我們將兩種部份完成後，加上現有的PVM 分散運算函式庫來增加演算的速度。
Abstract The research mainly discusses AI. AI, involves in several types, for example, neural network(NN),which adopts human-like training method; Expert systems determine and make decision by what it has known. We will use John Koza's Genetic Programming theory to implement an AI system.Genetic Programming theory is based on GA. In our experiments, we have to define what kind of applications we want : a sorting application, which is divided into two parts - a producer (along with crossover and mutation operations) and an executor (along with judging operations), is an easyimplemented algorithm. Our program, also with PVM, will approaches global optimal after evolutions.
毛細管中的拉午耳
本實驗利用簡單的儀器（使用毛細管與注射針筒）, 求出不同混合比例之有機溶液的各個成分之蒸氣壓、蒸發速率與蒸發量 , 進而可推算出蒸發熱速率,而利用此實驗得到的數值,並可應用在不同的領域,如日常生活中之散熱劑、工業上之機器散熱、及醫療上之人體退燒等,均可利用此實驗程序找出適當的比例,\r 並可進一步理論探討「拉午耳定律中正負偏差」以及「蒸氣中各成分的組成活性」。
\r In this experiment, simple instruments including capillary tubes and syringes are\r used to find vapor pressure, rate of evaporation, and evapotranspiration of all\r elements of organic solution under different mixed proportions. In this way, the\r rate of evaporation that can be compared ; therefore, becomes suitable for different\r areas that include heat dissipation for daily life, machine heat dissipation for\r industry, and fever reduction for medical applications. In other words, the experiment\r proposed here can be utilized to find the appropriate ratio. Meanwhile, we can use\r the results to perform the theoretical investigation of Positive-Negative Bias of\r Raoult's Law and Component Activity of Vapor.
酒精對斑馬魚胚胎眼睛發育的影響
長期以來，臨床研究發現會影響人類胚胎的正常發育，造成胚胎畸形、成長遲緩等現象，稱為胎兒酒精症候群（fetal alcohol syndrome），但是其病理機制仍不清楚。最近的研究發現斑馬魚胚胎對於酒精有非常靈敏的反應，出現明顯的發育異常現象，例如心臟膨大、眼睛縮小、骨頭變形等現象，與人類胎兒酒精症候群相似，顯示斑馬魚非常適合作為研究胎兒酒精症候群的模式動物。在本實驗中，我們針對酒精影響視網膜神經發育的現象進行探討，並且也利用基因晶片篩選出胚胎發育時期受酒精影的的基因轉錄子，藉以了解酒雞造成胚胎畸形發育的機制。實驗結果顯示在眼睛發育過程中，1.5% 酒精浸泡會抑制視網膜神經細胞的分層（Lamination），而進一步利用RNA定位雜交的方式以眼睛的標示基因rx1、pax6b、six3b、alpha-crystallin、rho、neuroＤ、huC觀察他們的表現，發現酒精會減少視網膜神經細胞的分化，造成眼睛發育的缺陷。在基因晶片的分析中，我們發現酒精處理會抑制許多控制眼睛發育的基因調控子的表現，包括了crx、rybp、irx4a、optx2、rx1、brn3b1 與 vsx1等，此外約有16%的眼睛相關基因液受到酒精的抑制，遠高於其他基因受抑制的比例，顯示眼睛是酒精傷害最嚴重的區域之一。我們從實驗結果得知酒精並未對胚胎發育初期眼睛的發育造成明顯的影響，但是隨後由於控制細胞分化的幾個重要基因受到酒精抑制作用，造成視網膜神經細胞的分化停止，引起眼睛的異常發育的情況。It was known that prenatal alcohol exposure may cause serious birth defects and developmental disabilities. The molecular mechanism of this fetal alcohol syndrome still remains unclear. Here we used zebrafish embryo as a model to investigate the toxic effect of alcohol in retinal development. The histochemical analysis revealed that the cell lamination was prohibited by alcohol incubation. It appears that the retinal cell differentiation was inhibited. As revealed by whole mount RNA in situ hybridization, it appears that the transcription of a number of retinal-related regulatory genes, including rx1, pax6b, six3b, alpha-crystallin, rho, neuroD and huC, were all inhibited in zebrafish embryo by alcohol exposure. The transcriptional profile of alcohol-exposed embryos was also compared with normal embryos by microarray analysis at different stages. It appears that 16% of retinal-related genes were all repressed by 1.5% alcohol incubation, including several retina-related transcriptional factors, including crx, rybp, irx4a, optx2, rx1, brn3b1and vsx1. Our results suggest that alcohol did not interfere the early development of the eye, but has inhibited the final cell differentiation of retina cells. This study helps us understand the molecular mechanism of alcohol-mediated retinal malformation.
天然植物色素與人工染料敏化之太陽能電池
本實驗以吸附染料之二氧化鈦奈米結構電極層為承載基材的太陽能電池為研究對象，旨在增進其光電轉換效率，促使染料有效地吸收光能後造成電荷分離，再經由二氧化鈦傳導帶向外傳出而形成電流，即所謂染料敏化太陽能電池。實驗主軸共分三：1、合成染料N3：觀察吸附度與浸泡時間之關係，發現在18~20 小時電池有最佳吸附；改變電解液濃度，求得最佳電解液濃度範圍；酸化二氧化鈦極板。2、天然植物色素：改變溶劑，得出高極性之丙酮對電池最佳；酸、鹼化植物色素；觀察電池隨著光照時間增加，性質趨於穩定。3、混合色素與染料：此實驗旨在印證不同吸能範圍之染料在極板混合浸泡後，電池吸能帶是否有疊加、擴充的效果，並觀察分開浸泡與混合色素一起浸泡之不同效應，量測IPCE 以玆比較。實驗結果可知，確實對於電池吸光範圍有所增加，且分開浸泡之效果較好。This experiment is mainly about the phtosensitization of Ti02 solar cell, aiming at improving the energy conversion efficiency, promoting the electric charge to separate from TiO2 and spread out through after the dye absorbs light. That is so-called dye-sensitized solar cell. The experiment mainly divides into three parts: 1. Ruthenium(II): Observing the connection between adsorption and dipped-time, find out that solar cell has best to adsorb in 18 to 20 hours; change the concentration of electrolyte; acidification TiO2. 2. Photosynthetic pigments: Change solvent, and get the conclusion that pigment has better adsorption in high polar solvents such as acetone; acidification/basification pigments; observe the changing of energy conversion efficiency while the illumination time increases. 3. Mixed the dye and pigment: This experiment is aim at proofing that the absorption spectrum of soaked-TiO2 may mix after dipped in different dye and pigment. Furthermore, we compares the differences between TiO2 dipped in one mix solution and dipped in several solutions separately, measure its IPCE. According to the experiment, the spectrum of soaked-TiO2 is certainly larger, and dipping in solution separately has better effect to the battery.