Browsing by Issue Date, starting with "2009-10-19"

Now showing 1 - 20 of 49584

Improving the detection of hydrogen peroxide of screen-printed carbon paste electrodes by modifying with nonionic surfactants
(2009-10-19)
Yuan, Chiun-Jye
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Wang, Yen-Chi
;
Reiko, Ohara
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生物科技學系
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Department of Biological Science and Technology
Nonionic surfactants, such as Triton X-100 and Tween-20, were shown in this study to improve the electroatalytic activity of screen-printed carbon paste electrodes (SPCE) The electrochemical response of SPCE to hydrogen peroxide increased 8-10-fold with the modification of nonionic surfactants. In addition, the glucose biosensors fabricated from nonionic surfactant-modified SPCE exhibited 64-8 6-fold higher response to glucose than that fabricated from unmodified SPCE A concentration effect is proposed for nonionic surfactant to bring neutral reactants to the surface of electrode. Moreover, nonionic surfactant-modified SPCE exhibits a capability of repetitive usage and good reproducibility (R S D < 5%) in the measurement of H(2)O(2) Interestingly, the nonionic surfactant-modified SPCE exhibited an opposite effect to ascorbic acid, a common electroactive agent, which causes interference during clinical diagnosis The differential responses of nonionic surfactant-modified SPCE to H(2)O(2) and ascorbic acid Suggest its potential in the development of biosensors for clinical diagnosis (C) 2009 Elsevier B.V. All rights reserved
Variable liquid crystal pretilt angles generated by photoalignment in homeotropically aligned azo dye-doped liquid crystals
(2009-10-19)
Fuh, Andy Ying-Guey
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Liu, Cheng-Kai
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Cheng, Ko-Ting
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Ting, Chi-Lung
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Chen, Che-Chang
This letter demonstrates the feasibility of producing variable liquid crystal (LC) pretilt angles using light-induced ripple structures (LIRSs) in homeotropically aligned azo dye-doped liquid crystals (ADDLCs). Illuminating homeotropically aligned ADDLCs with a linearly polarized light for a suitable period yields the LIRSs which provide LCs an anisotropic homogeneous anchoring force. Experimentally, the effective alignment force produced by the homeotropic alignment layer and the LIRSs determines the LC pretilt angle (24 degrees to 63.5 degrees), defined from the normal to the substrate. A no-bias pi cell for liquid crystal displays is demonstrated using this approach. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3253413]
交大e-News第058期
(2009-10-20)
Secretariat
;
國立交通大學秘書室
Self-Assembly structures through competitive interactions of miscible crystalline-amorphous diblock copolymer/homopolymer blends
(2009-10-20)
Lin, I-Hong
;
Kuo, Shiao-Wei
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Chang, Feng-Chih
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應用化學系
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Department of Applied Chemistry
A series of miscible crystalline-amorphous diblock copolymers, (poly(epsilon-caprolactone)-b-(vinyl phenol), PCL-b-PVPh) were prepared through sequential ring-opening and controlled living free radical (nitroxide-mediated) polymerizations and then blended with poly(vinyl pyrrolidone) (PVP) homopolymer. Specific interactions, miscibility, and self-assembly morphologies mediated by hydrogen bonding interactions of this new A-B/C type blend, were investigated in detail. Micro-phase separation of these miscible PCL-b-PVPh diblock copolymers occurs by blending with PVP through competitive hydrogen bonding interaction in this A-B/C blend. FTIR, XRD, and DSC analyses provide positive evidences that the carbonyl group of PVP is a significantly stronger hydrogen bond acceptor than PCL, thus the PCL block is excluded from the PVPh/PVP miscible phase to form self-assembly structure. (13)C CP/MAS solid-state NMR spectra provide additional evidence confirming that micro-phase separation occurs in the blend system because of the presence of more than two T(1p)(H) values for this A-B/C blend system. According to the result of the FTIR and SAXS results, the smaller molecular weight system contains a greater fraction of the hydrogen-bonded carbonyl group, cause indirectly the high degree of phase separation among these blends. In addition, the SAXS profiles possess a sharp primary peak and highly long range ordered reflections q/q* ratios of 1:2:3 at lower PVP content, an indication of the lamellar structure in the blend which is consistent with TEM image. The phase behavior and morphology shifts from lamellar to cylinder structure with further increase in the PVP content. (C) 2009 Elsevier Ltd. All rights reserved.
以結合半準位信號及多階層錯誤編碼的光碟防盜拷方法
(2009-10-21)
高銘盛
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廖晨吟
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葉人瑋
一種以結合半準位信號及多階層錯誤編碼的光碟防盜拷方法，本發明之方法是先於光碟設有加密鍵，再以設於光碟導入區之半準位信號及多階層錯誤編碼保護該加密鍵，使該加密鍵被正確解復之機率曲線產生明顯截止現象，達到防制盜拷之功效，而截止現象是依一定範圍之反射率而判斷。本發明係為一種低成本及防制各種方式盜拷之方法，並解決習用0位元與1位元被輕易複製的問題，且適用於一般播放器，不需複雜的配備及精密的檢測電路。
On the mechanism of spectral selective sensitivity of photonic biosensors
(2009-10-21)
Khudaverdyan, Surik
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Dokholyan, Janna
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Arustamyan, Vladimir
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Khudaverdyan, Ashot
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Clinciu, Daniel L.
We report a new optical sensor exploiting the innovative operation principle developed for the selective registration of UV and visible radiations. The operation is based on the mutual influence of depletion regions in the photovoltaic structure composed by Schottky barrier and n-p junction. The important feature of this structure is that the depletion regions expand over the whole base so that they contact each other. We have shown that the position of the contact point in the base is a function of voltage applied to the structure. Also absorption spectrum for each of the depletion regions and the photoresponse of the structure are functions of the applied voltage. We have revealed that the change induced by the applied voltage in the photoresponse, Delta I, is proportional to the change Delta lambda induced in the spectrum, Delta lambda-Delta I. This linear correlation between Delta I and Delta lambda is a very important spectrophotometric property required for the precise selective registration of bio signals in dynamic and static biological processes. (C) 2009 Elsevier B.V. All rights reserved.
環保農業　重建農村生態系
(2009-10-25)
蔡欣穎
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Department of Communication and Technology
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傳播與科技學系
有機農業在健康意識抬頭的現代，相當受到注目，現在台灣有許多農民，紛紛加入種植有機蔬果的行列，為的是希望回復台灣以前的農村景象，為環保盡一份心力。
新竹火車站面面觀
(2009-10-25)
郭伯宇
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Department of Communication and Technology
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傳播與科技學系
身為新竹市門戶的新竹火車站有著悠久的歷史，巴洛克時期的建築造型讓它獨樹一幟。而每天來來往往的旅客和他周邊的文藝和商業活動，讓它成為新竹地區最重要的中心。
《巨流河》沖刷出澎湃曲折
(2009-10-25)
張雅晴
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Department of Communication and Technology
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傳播與科技學系
從長城外的「巨流河」開始，到台灣南端恆春的「啞口海」結束。齊邦媛寫下顛沛流離的一生，如同二十世紀中國的縮影。
目標兩百五十碼
(2009-10-25)
陳柏臻
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Department of Communication and Technology
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傳播與科技學系
目標兩百五十碼
我在Online
(2009-10-25)
鄭琬馨
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Department of Communication and Technology
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傳播與科技學系
我在Online，我是一個補師，我在這裡過著截然不同的人生。
價值
(2009-10-25)
葉東瑜
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Department of Communication and Technology
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傳播與科技學系
為什麼人總是把自己的價值觀加諸別人之上?又為什麼人總要活在別人的價值之中?
公園生活裡的擁擠和孤寂
(2009-10-25)
童于蕙
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Department of Communication and Technology
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傳播與科技學系
人與人之間相遇的方式多到無法想像吧！一個擦肩而過，或一次不經意的認錯而開始的一段際遇總是讓人意想不到，而後透過之間的交流，建立情感，從陌生到親近，又從親近逐漸疏遠，這些看似複雜過程也述說著人就是這樣活著，存在著，《公園生活》描述的就是這樣的故事，其中收錄兩則中篇小說：〈公園生活〉與〈flowers〉，作者吉田修一用他清淡樸素又不失幽默的文字道出生活在都市中的人們內心最真實的心情。
玩樂最大　好個「蛙哲學」
(2009-10-25)
賴合新
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Department of Communication and Technology
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傳播與科技學系
「在我的玩樂字典裡可沒有什麼叫做輕鬆的行程，而只有難忘的行程，至於難忘，就必須要刻苦，要刻骨才會難忘…」
林金聲　交大28年的老朋友
(2009-10-25)
黃湞尹
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Department of Communication and Technology
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傳播與科技學系
林金聲陪交大走過28年，從年輕到頭髮斑白，光復校區變換的容顏他都看在眼裡。那些印在泛黃紙張上的歷史，透過林金聲的生動描述，歷歷在目。
多元整合　禮儀服務新詮釋
(2009-10-25)
林乃絹
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Department of Communication and Technology
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傳播與科技學系
近年來，喪葬禮儀業出現前所未有的現代化趨勢，禮儀師的出現成為眾所矚目的新興行業，而人們對於禮儀師的了解依舊懵懵懂懂。
喀報NO.60總編的話
(2009-10-25)
溫苔詠
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Department of Communication and Technology
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傳播與科技學系
本週的話
媒體撒「網」　捉不到公正
(2009-10-25)
林詩雯
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Department of Communication and Technology
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傳播與科技學系
主流媒體對非主流的公民新聞的正統性議論似乎已漸漸轉化為「肯定」態度。現在，各大媒體的新聞標題上，時常能夠看見「網友」一詞的出現，並且成為新聞內容的主角。姑且不論真正能夠代表公民新聞、公民記者的定義為何，但網友的聲音已被主流媒體聽見，也已佔有重要分量。
免試上路　新制多爭議
(2009-10-25)
吳雨璇
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Department of Communication and Technology
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傳播與科技學系
教育部將於明年開始實施「高中職與五專免試入學方案」，在99學年度到100學年度的宣導推動期間，每間學校將會釋出5%到35%的名額，根據聯合晚報的報導，今年主辦基測的高雄市左營高中預估這項政策將會使明年的參加考試的學生人數跌破三十萬。
曾經有過那麼一個女孩
(2009-10-25)
鄭伊婷
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Department of Communication and Technology
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傳播與科技學系
一個關於的愛情小小詠嘆調