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Study of Drift Behavior for RuO_x Sensing Membrane with Penicillinase Immobilized by GPTS

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稀有金属材料与工程 2006年第A03期35卷 228-229页

作者： Jung-chuan chou Sheng-Hung Chen Graduate School of Electronic Engineering National Yunlin University of Science and TechnologyDouliouTaiwan 640China

The ruthenium oxide(RuO_x) thin film was prepared by using the *** *** RuO_x pH-sensitive electrode possesses a nearly-Nernstian pH sensitivity(about 57 mV/pH).For the enzyme penicillinase was immobilized directly onto a RuO_x pH-sensitive surface by 3-glycidoxypropyltrimethoxysilane(GPTS).Some characteristics of the biosensor, such as sensitivity,linear range,and drift,are investigated and the difference between penicillinase immobilized and without are *** to the time-constant model,we can extract the time constant and amplitude at the response curve of the ***,the extracted parameters were used to simulate the mechanism of the drift behavior.

关键词： ruthenium oxide pH-sensitive electrode penicillinase drift behavior

Study on the Characteristics of the Ruthenium Oxide pH Electrode

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稀有金属材料与工程 2006年第A03期35卷 256-258页

作者： Jung-chuan chou Diing-Jia Tzeng Graduate School of Electronic Engineering National Yunlin University of Science and TechnologyDouliouTaiwan 640China

Ruthenium oxide,which fabricated by radio frequency sputtering is used as the sensitive membrane,which shows that the pH sensitivity is very high and has a linear response in different buffer *** pH electrode,which applies the structure of separative structure EGFET (Extended Gate Field Effect Transistor) insteads of the conventional gate ISFET (Ion Sensitive Field Effect Transistor) for reducing the cost of the fabrication and ***,the performance of the pH sensor was falsified by the drift and *** addition,the total response is composed of the intrinsic response and drift,and the hysteresis effect combines the slow response with ***,we would also investigate the drift in the buffer solutions and hysteresis effect in the different *** this way,the more accurate sensing properties are obtained by the RuO_x pH electrode.

关键词： ruthenium oxide EGFET drift hysteresis

Potentiometric Urea Biosensor Based on Ion-Selective Electrode by Different Immobilization Procedures

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稀有金属材料与工程 2006年第A03期35卷 309-312页

作者： Nien-Hsuan chou Jung-chuan chou Tai-Ping Sun Shen-Kan Hsiung Institute of Electronic Engineering Chung Yuan Christian University Chung-Li Taiwan 320 China Graduate School of Electronic Engineering National Yunlin University of Science and Technology Douliou Taiwan 640 China Department of Electrical Engineering National Chi Nan University Nantou Taiwan 545 China

Enzyme was immobilized on an ammonium ion-selective electrode by different *** ion-selective electrode is not completely ion-specific,and interfering ions react with the ion-selective electrode membrane,altering the measured ***,the characteristics of the effect of other ions on ammonium ion-selective electrode-based urea biosensors are *** on the experimental results,the urea biosensor based on entrapment had a high response voltage of around 189 mV and fast response time of around 16 ***,selectivity of the urea biosensor in different interfering ions was considered to elucidate the characteristics of ammonium ion-selective electrode-based biosensors.

关键词： enzyme immobilization ammonium ion-selective electrode interfering ions urea biosensors selectivity

Study on the Multi-Sensing System Based on the Tin Oxide pH Electrode

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稀有金属材料与工程 2006年第A03期35卷 221-224页

作者： Gin-chou Yang Jung-chuan chou Tai-Ping Sun Shen-Kan Hsiung Institute of Electronic Engineering Chung Yuan Christian University Chung-Li Taiwan 320 China Graduate School of Electronic Engineering National Yunlin University of Science and Technology Douliou Taiwan 640 China Department of Electrical Engineering National Chi Nan University Nantou Taiwan 545 China

In this study,the multi-sensing system based on the tin oxide pH electrode for the ion-determination was presented. With the advantages of the real-time supervisory control apparatus,the measured values could be displayed on the liquid crystal display (LCD) *** this study,the basic sensor was the tin oxide pH electrode,which was fabricated by radio frequency (r.f.) sputtering system on the indium tin oxide (ITO)/glass ***,the major blocks of the system consist of the tin oxide electrode-based ion selective electrodes (ISEs),an analog front-ended readout circuit,a microcontroller with built-in analog to digital (A/D) *** addition,by the embedded system design,the measurement results can be transmitted to a portable system or computer through the Universal Serial Bus (USB) and Universal Asynchronous Receiver Transmitter (UART) interface *** to the experimental results,the multi-sensing system has high performance and reliability for pH,K^+,and Na^+ detection.

关键词： multi-sensing system tin oxide pH electrode liquid crystal display(LCD) tin oxide electrode-based ion selective electrodes(ISEs) universal serial bus(USB) universal asynchronous receiver transmitter(UART)

Eco-Environmental Impact Assessment of Pre-Leisure Beach Nourishment on the Benthic Invertebrate Community at Anping Coast

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China Ocean Engineering 2011年第2期25卷 215-236页

作者： Chun-Han SHIH Yi-Yu KUO Ta-Jen CHU Wen-Chieh chou Wei-tse CHANG Ying-chou LEE Institute of Fisheries Science National Taiwan University Taipei 10617 China Department of Civil Engineering National Chiao Tung University Hsinchu 30010 China Department of Leisure and Recreation Management Chung Hua University Hsinchu 30012 China Department of Civil Engineering Chung Hua University Hsinchu 30012 China

In recent years, owing to global warming and the rising sea levels, beach nourishment and groin building have been increasingly employed to protect coastal land from shoreline erosion. These actions may degrade beach habitats and reduce biomass and invertebrate density at sites where they were employed. We conducted an eco-environmental evaluation at the Anping artificial beach-nourishment project area. At this site, sand piles within a semi-enclosed spur groin have been enforced by use of eco-engineering concepts since 2003. Four sampling sites were monitored during the study period from July 2002 to September 2008. The environmental impact assessment and biological investigations that we conducted are presented here. The results from this study indicate that both biotic （number of species, number of individual organisms, and Shannon-Wiener diversity） and abiotic parameters （suspended solids, biological oxygen demand, chemical oxygen demand, dissolved inorganic nitrogen, dissolved inorganic phosphorus, total phosphorus, total organic carbon, median diameter, and water content） showed significant differences before and after beach engineering construction. Biological conditions became worse in the beginning stages of the engineering but improved after the restoration work completion. This study reveals that the composition of benthic invertebrates changed over the study period, and two groups of organisms, Bivalvia and Gastropoda, seemed to be particularly suitable to this habitat after the semi-enclosed artificial structures completion.

关键词： beach nourishment benthic invertebrate eco-engineering ecological restoration spur groin

Study on the Real Time pH Measurement System Using for Wireless Technology

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稀有金属材料与工程 2006年第S3期 244-245页

作者： Jung-chuan chou Shen-Kan Hsiung Graduate School of Electronic Engineering National Yunlin University of Science and TechnologyDouliouTaiwan 640China Institute of Electronic Engineering Chung Yuan Christian UniversityChung-LiTaiwan 320China

The application of Bluetooth on the pH sensor was *** on the experimental results,Bluetooth technology was used to measure pH values without limiting the ***,Biuetooth technology provides low power, low cost and small volume,therefore,it can increase the practicability of the *** this investigation,the pH value was detected by the SnO2/ITO glass-based pH *** the signal progress,the detected signal was transferred to the microchip *** that,the microchip was able to communicate with PC by the ***,the microchip can diagnose the sensing signal and sends the warning signal by alert *** addition,the part of PC has the ability to record the information,builds the database for analyzing the pH values,and provides a better long-distance monitoring system.

关键词： bluetooth technology SnO2/ITO glass-based pH sensor microchip monitoring system

Identifying Indicator Species in Habitats Created by Coastal Structures

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China Ocean Engineering 2010年第1期24卷 117-134页

作者： Yi-Yu KUO Chun-Han SHIH Ying-chou LEE Wei-tse CHANG Ta-Jen CHU Department of Civil Engineering National Chiao Tung University Hsinchu 30010 China Institute of Fisheries Science National Taiwan University Taipei 10617 China Department of Leisure and Recreation Management Chung Hua Univershy Hsinchu 30012 China

In this paper, three approachs were developed to find indicator species from the habitat created by coastal structures. These approachs consist of a model of species co-occurrence probability, a model of k-environmental factor probability and a composite model. Simultaneously, a case study was conducted in Hsinchu Fishing Port of north-western Taiwan. Based on the aforementioned models, three primary producer species, Ahnfeltiopsis flabelliformis, Chondrus ocellatus and Sarcodia montagneana, were chosen as the indicator species which had the highest co-occurrence probabilities and showed greater tolerance to more critical environment. It is imperative to understand how the three species under particular co-occurring conditions and environmental factors influence the composition of sessile assemblages in coastal water. The results indicate that for the purpose of increasing biodiversity, these models are feasible to find indicator species of artificial structures, and to help make it possible to design coastal structures based on biological considerations. This study provides an innovative approach for further advanced application in the artificial habitat of coast management.

关键词： coastal structures indicator species sessile organisms ecological restoration

Study on the Tin Oxide Sol-Gel Membrane as a pH Sensing Electrode

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稀有金属材料与工程 2006年第A03期35卷 238-239页

作者： Chin-Shuen Hung Jung-chuan chou Tai-Ping Sun Shen-Kan Hsiung Institute of Electronic Engineering Chung Yuan Christian University Chung-Li Taiwan 320China Graduate School of Electronic Engineering National Yunlin University of Science and Technology Douliou Taiwan 640China Department of Electrical Engineering National Chi Nan University Nantou Taiwan 545 China

In this study,tin oxide sensing membrane was derived by sol-gel method and was coated onto indium tin oxide (ITO) glass substrate by spin-coating technique to fabricate a pH sensing ***,the morphology of the tin oxide membrane has been discussed through the instrumental ***,the sensing characteristics of the pH electrode was measured by commercial instrumental amplifier as the readout *** to the sol-gel method has many advantages such as easy fabrication of gel solution,ability to dope other materials without any expensive fabricating ***,it is suitable for the mass production of a disposable sensor.

关键词： tin oxide sensing membrane sol-gel method spin-coating technology pH sensing electrode

Study on the Blood Gas Sensor Based on Optical Absorption Technology

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稀有金属材料与工程 2006年第A03期35卷 213-216页

作者： Chih-Wei Lai Jung-chuan chou Tai-Ping Sun Shen-Kan Hsiung Institute of Electronic Engineering Chung Yuan Christian University Chung-Li Taiwan 320 China Graduate School of Electronic Engineering National Yunlin University of Science and Technology Douliou Taiwan 640 China Department of Electrical Engineering National Chi Nan University Nantou Taiwan 545 China

Continuous intra-arterial blood gas monitoring is used clinically in hospital and intensive care unit *** blood gas can be detected by the colormetric indicators which are sealed in the silicone *** glass tubing of the sensor should be as thin as possible since it affects response time and the bicarbonate buffer shifts the sensitivity of the sensor. In this paper,the sensitivity shifts by the bicarbonate buffer was *** carbon dioxide diffuses into the indicator, the carbon acid is produced and the bicarbonate buffer is used to control internal *** the sensitivity of the pCO_2 sensor is increased by controlling the concentration of the bicarbonate buffer,the bicarbonate buffer is used to obtain the optimum resolution in this ***,the different concentrations of the bicarbonate buffer for blood gas measurements are discussed in detail.

关键词： silicone membrane colorimetric indicators bicarbonate buffer blood gas