Academic literature on the topic 'Urea biosensor'
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Journal articles on the topic "Urea biosensor"
Chou, Jung-Chuan, Cian-Yi Wu, Si-Hong Lin, Po-Yu Kuo, Chih-Hsien Lai, Yu-Hsun Nien, You-Xiang Wu, and Tsu-Yang Lai. "The Analysis of the Urea Biosensors Using Different Sensing Matrices via Wireless Measurement System & Microfluidic Measurement System." Sensors 19, no. 13 (July 8, 2019): 3004. http://dx.doi.org/10.3390/s19133004.
Full textZusfahair, Zusfahair, Dian Riana Ningsih, Elok Dwi Putri Lestari, and Amin Fatoni. "Development of Urea Biosensor Based on Immobilized Urease in Chitosan Cryogel." Molekul 14, no. 1 (June 4, 2019): 64. http://dx.doi.org/10.20884/1.jm.2019.14.1.523.
Full textKuo, Po-Yu, and Zhe-Xin Dong. "A New Calibration Circuit Design to Reduce Drift Effect of RuO2 Urea Biosensors." Sensors 19, no. 20 (October 20, 2019): 4558. http://dx.doi.org/10.3390/s19204558.
Full textKim, Jee Young, Gun Yong Sung, and Min Park. "Efficient Portable Urea Biosensor Based on Urease Immobilized Membrane for Monitoring of Physiological Fluids." Biomedicines 8, no. 12 (December 11, 2020): 596. http://dx.doi.org/10.3390/biomedicines8120596.
Full textAlegret, S., J. Bartrolí, C. Jiménez, E. Martínez-Fàbregas, D. Martorell, and F. Valdés-Perezgasga. "ISFET-based urea biosensor." Sensors and Actuators B: Chemical 16, no. 1-3 (October 1993): 453–57. http://dx.doi.org/10.1016/0925-4005(93)85227-2.
Full textRazumiene, Julija, Vidute Gureviciene, Ieva Sakinyte, Laurynas Rimsevicius, and Valdas Laurinavicius. "The Synergy of Thermally Reduced Graphene Oxide in Amperometric Urea Biosensor: Application for Medical Technologies." Sensors 20, no. 16 (August 11, 2020): 4496. http://dx.doi.org/10.3390/s20164496.
Full textMulyasuryani, Ani, Anna Roosdiana, and Arie Srihardyastutie. "THE POTENTIOMETRIC UREA BIOSENSOR USING CHITOSAN MEMBRANE." Indonesian Journal of Chemistry 10, no. 2 (July 21, 2010): 162–66. http://dx.doi.org/10.22146/ijc.21454.
Full textColasanti, G., G. Arrigo, A. Santoro, S. Mandolfo, C. Tetta, R. Bucci, M. Spongano, E. Imbasciati, V. Rizza, and D. Cianciavicchia. "Biochemical Aspects and Clinical Perspectives of Continuous Urea Monitoring in Plasma Ultrafiltrate: Preliminary Results of a Multicenter Study." International Journal of Artificial Organs 18, no. 9 (September 1995): 544–47. http://dx.doi.org/10.1177/039139889501800912.
Full textKurniawan, Sendy, Dian Nur Fajariati, Helmi Auliyah Istiqomah, Oki Mandalia Antasari, and Ani Mulyasuryani. "PENENTUAN UREA DALAM SERUM DARAH DENGAN BIOSENSOR KONDUKTOMETRI Screen Printed Carbon Electrode (SPCE) – NATA DE COCO." Molekul 10, no. 2 (November 1, 2015): 97. http://dx.doi.org/10.20884/1.jm.2015.10.2.10.
Full textPijanowska, Dorota G., and Władysław Torbicz. "pH-ISFET based urea biosensor." Sensors and Actuators B: Chemical 44, no. 1-3 (October 1997): 370–76. http://dx.doi.org/10.1016/s0925-4005(97)00194-9.
Full textDissertations / Theses on the topic "Urea biosensor"
Gupta, Vandana. "Design, Fabrication and Performance Evaluation of an Impedimetric Urea Biosensor System." VCU Scholars Compass, 2005. http://scholarscompass.vcu.edu/etd/890.
Full textSilva, Guilherme de Oliveira. "Biossensor de ureia utilizando dispositivo pH-EGFET." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/59/59135/tde-19112013-115103/.
Full textSensors are devices capable of capturing a certain physical-chemical signal from environment and convert it into a measurable electrical signal by a transducer. Biosensor is a sensor which has a biological sensing element as receptor specific to a particular target analyte. The physical-chemical signals experienced by these devices are converted into electrical signals with magnitude proportional to the concentration of one or more chemical compounds. In this work, we built a pH-sensor using commercial thin films of tin oxide doped with fluorine (FTO) as ions receptor. The sensor was made by linking FTO samples to the gate of a field effect transistor MOS type. In solution, the ions interact with the sample being adsorbed on the surface of FTO film. The potential generated by the ions adsorbed on film\'s surface modulate the gate voltage of the transistor and, in this way, we can determine the concentration of ions present in solution correlated with the magnitude of the transistor response. This kind of device is given the name of EGFET (Extended Gate Field Effect Transistor). The EGFET built exhibits sensitivity of 55 mV/pH and linear response in the range of pH 2 to 12. Through enzyme immobilization techniques we could covalently bind urease proteins on the surface of FTO film, changing the pH-sensor in urea biosensor. Buffer solutions with differents pHs and concentrations were tested and was determined that optimal environment conditions for this urea biosensor is buffer solutions with pH = 6 and 10mM of concentration. Under these conditions, the biosensor showed sensitivity of 114.5 mV/p(urea) and linear response in the range of 3,2.10 -4 to 3,2.10 -2 mol/L
Fernandes, Jessica Colnaghi. "Biossensores de pH, ureia e glicose utilizando a microeletrônica de filmes finos de AZO e TIO2." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/59/59135/tde-09032016-154506/.
Full textThis study presents the development of pH, urea and glucose biosensors, by the use of oxides as the base of the sensing membrane. Conducting oxide thin films were prepared by different deposition techniques, such as spin-coat, dip-coat, spray-pyrolysis, and casting. AZO and TiO2 were produced and coated onto FTO, ITO and glass substrates. The number of layers were changed for each deposition technique, and the surface characterizations were made by SEM, XRD and FTIR, while the electrical characterizations were performed with an EGFET device and cyclic voltammetry. The samples were used as pH sensors in the pH range from 2 to 8. The AZO thin film onto FTO substrate deposited by spray-pyrolysis deposition technique presented sensitivity as 31.7 mV/pH for the total pH range from 2 to 8. TiO2 thin films, produced by dip-coat deposition technique with 5 layers onto FTO substrate presented 37.8 mV/pH as sensitivity, for the same pH range. All the films have their surfaces immobilized with proteins as urease or glucose oxidase. In this case, the samples were performed in different concentrations of urea or glucose, respectively, from 5 to 200 mg/dL, for both. Urea biosensors presented good results for measurements performed with the same sample as well as performed with individuals samples, for all the concentrations range. Spin-coated TiO2 thin films with 5 layers onto FTO substrates presented 3.32 mV/(mg/dL) as sensitivity from 5 to 120 mg/dL urea concentrations, while for glucose biosensors presented 6.18 mV/(mg/dL) for the same film between the glucose concentration range from 5 to 20 mg/dL. Some results were equal or better than the results in current literature, even the films are still capable of optimization.
Shaw, Shannon Joanne. "The development of polypyrrole-based biosensors /." View thesis, 1994. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030901.111607/index.html.
Full textXie, Wenbing. "Etude théorique et expérimentale de couplages chimico-mécaniques dans des systèmes associant une structure polyélectrolytique à une réaction enzymatique." Rouen, 1989. http://www.theses.fr/1989ROUES034.
Full textRover, Junior Laercio. ""Construção e avaliação de biossensor potenciometrico para determinação de ureia, com eletrodo ion-seletivo a amonio, usando canavalia brasiliensis como fonte enzimatica"." [s.n.], 1995. http://repositorio.unicamp.br/jspui/handle/REPOSIP/250387.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Quimica
Made available in DSpace on 2018-07-19T23:53:12Z (GMT). No. of bitstreams: 1 RoverJunior_Laercio_M.pdf: 1973498 bytes, checksum: a8176355af0b235fa0b0fdf3bd93dfe8 (MD5) Previous issue date: 1995
Mestrado
Lai, Chien-Hung, and 賴建宏. "Development of Urea Biosensor." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/74893046446786156467.
Full text淡江大學
化學學系碩士班
95
The copper(I) oxide based urea biosensor was fabricated in this experiment, and it possessed reduced overvoltage for ammonia determination. The enzyme Urease (EC 3.5.1.5) was drop-coated on the up-stream of dual electrode and subsequently the NH3 was determination through copper(I) oxide modified down-stream electrode. The preparation of this biosensor was as follows, carbon ink and 20% copper(I) oxide had been well mixed and drop-coated on the downsteam electrode ; the urease (0.5 unit) was dropped on the upstream and dried secondly;the 1% 0.5 μl bovine serum albumin drop-coated on the upstream and dried; the 1% 0.5 μl glutaraldehyde dropped on the upstream and dried finally. The optimized conditions in the 0.05M pH 9 carbonate buffer ; applied potential was 0.2 V (vs. Ag/AgCl) ; flow rate was 0.5 ml/min; sample loop was 50 μl. The analytical performances of biosensor equipped with linear range upto 10 mM(R=0.99) and sensitivity is 85.736 nA/mM, detection limit (S/N=3) was 85 μM, and precision is 1.8% by twenty successive measurement. In order to eliminate interference, PbO2 was used to pre-oxidize those easily oxidative compounds, such as ,dopamine, epinephrine, serotonin, histamine , acetaminophen ,uric acid, ascorbic acid. Compared with standard method (sigma640), the correlation coefficient was 0.995.
Wu, Hao-Yu, and 吳皓羽. "Develop urea biosensor based on an ammonium electrode." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/60809417830706171256.
Full text中華醫事科技大學
生物醫學研究所
102
Ammonia (NH3) is a compound that exists ubiquitously in the atmosphere and natural water and is the compound having the simplest chemical structure among the nitrogen-containing species. In the case of pH value below 8, as ammonia dissolves in water, it reacts with water molecules to form ammonium ions (NH4+) mostly. When there is too much ammonia dissolved in water, the water becomes eutrophic, leading to the aquatic ecological imbalance. In the human body, the normal urea concentration in the plasma is 18-36 mg/dl whereas in the clinical practice urea is most often measured in term of the amount of nitrogen, namely the urea nitrogen. The concentration of urea nitrogen of 1 mg/dl is equivalent to a concentration of urea of 2.14 mg/dl. Urea nitrogen varies according to the human body condition and reflects on the variation of urea concentration. Therefore, measuring the concentration of urea in blood can be a meaningful method to monitor the body condition in the clinical practice. For the demand of detecting the ammonium ions of the ammoniacal nitrogen in the environment and of the urea nitrogen in the human body, if the lowest detection limit of the electrode described in this research publication can be fully developed, further lower concentrations of urea in the environment or human blood and urine can be measured more accurately. In this publication, the extended ITO/PET ion-sensitive field-effect transistors are used to produce the durable ammonium ion-selective electrodes for investigating the impact to the overall reaction affected by each parameter. According to the results of several experiments, the concentration of ammonium ion in the range between 10-5 ~ 1M is detectable with a linear range of about 0.99 and the average sensibility is 55.09 mV / pNH4+. As for the buffer solution, PB and Tris buffer solutions are used for measurement whereas the use of Tris buffer can stabilize the measuring results. While researching the references, some references indicate that the sensitivity can be better by adding EDTA in the buffer solution. Therefore, experiments with EDTA added and without EDTA added in the buffer solutions were both conducted. However, the results show that the experiments without adding EDTA have better sensitivities to the reactions. Since then, the experiments proceeded without EDTA. In order to demonstrate the value of this sensor whose lowest detection limit is lower than that of a traditional urea sensor, experiments thus have been conducted with the interval expansion of urea concentration (1mg/dl ~ 8mg/dl). The expansion result shows that this electrode is more sensitive than a regular sensor in reacting to lower urea concentrations, and the detection limit of this electrode is also lower. For monitoring the human body condition, to apply this dilution method to dilute the urea or blood from a normal body to the most suitable concentration level for measurement will bring the most sensitive and reliable reaction result in the future. Nothing is more serious than the water pollution in the detection of the environmental hazards. Therefore, this sensor is even more valuable when it comes to the monitoring of the water bodies. Since the urea produced by the ammonium ions in the water bodies is found in trace quantities, the lower the detection limit of the sensor is, the more sensitive and reliable result the sensor can produce while monitoring the extreme low concentration of urea produced by the ammonium ions. Therefore, this sensor can be used to monitor natural water bodies and environments. This sensor has a detection limit lower than that of a regular sensor and is of better sensitivity. This sensor can more quickly detect the low concentrations of urea exists in the environment in the future and can monitor the blood and urine in human bodies. If this electrode can be fully developed in the future, it can bring significant contribution to the environmental protection and human body wellness. Keywords: Ammonia, Ammonium biosensor, Ammonium ion-selective electrode
Huang, Shi-Wei, and 黃士維. "Urea biosensor based on self-assembled technology on ITO." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/82061504542456191265.
Full text逢甲大學
化學工程學系
101
In this study, ITO glass as a substrate and using constant potential method on ITO glass coated with ZnO film to increase its electrical conductivity. after that, we use self-assembled technology at the 3-aminopropyltrimethoxysilane (APTMS) coated on the ZnO film and use the covalent bonding method that to form amide bond between urease and amino group on the sensor electrode. Pt-C catalyst was added to enhance potential signal. The enzyme electrode to be detect in electrochemical sensing system. Looking for the best preparation conditions for the enzyme electrode. Finally, the performances of the enzyme electrodes made from different temperature and different pH were examined and compared. According to the experimental results, urease concentration of 80 mg/ml makes the best enzyme electrode. At T = 50℃, pH = 7 environment, with the best sensitivity 43.600 mV / decade. After two weeks the enzyme activity of the biosensor still 75%.
Wang, Yen-Sheng, and 王彥盛. "Study and fabrication urea biosensor using the enzyme immobilization." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/94399411427627613340.
Full text國立雲林科技大學
電子與資訊工程研究所碩士班
91
In this thesis, the principle of the MOSFET was be used for the ion-sensitive field effect transistor (ISFET). The gate metal of the MOSFET was substituted for the insulator over the SiO2 , which must be sensitive for the H+ and OH- in the buffer solution. Reference electrode was used to supply the reference potential for the buffer solution. The threshold voltage (VT) of the ISFET will shift in the various pH buffer solutions. Hence, the pH value of the solution can be detected by the ISFET. Then we use gel entrapment to coating enzyme on sensing membrane as enzyme membrane, which by the enzyme immobilizing technology. The enzyme membrane can detect certain of the substance for the biochemical reaction（redox reaction）, use the ion sensitive field effect transistor to detect pH value of redox reaction which make the enzyme sensitive field effect transistor（EnFET）. In this thesis, we make a study of the gel entrapment to modify the urease on the ionic sensing membrane as the urea sensor.
Books on the topic "Urea biosensor"
Book chapters on the topic "Urea biosensor"
Chirizzi, Daniela, and Cosimino Malitesta. "A New Potentiometric Urea Biosensor Based on Urease Immobilized in Electrosyntesised Poly(O-Phenylenediamine)." In Lecture Notes in Electrical Engineering, 335–38. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1324-6_52.
Full textGambhir, A., A. Kumar, B. D. Malhotra, B. Miksa, and S. Slomkowski. "Enhanced Loading and Stability of Urease Covalently Attached to Polypyrrole Microspheres for Application to Urea Biosensor." In New Horizons in Biotechnology, 153–61. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0203-4_14.
Full textTikhonenko, Sergey A., Alexey V. Dubrovskii, Aleksandr L. Kim, and Egor V. Musin. "The New Class of Diagnostic Systems Based on Polyelectrolyte Microcapsules for Urea Detection." In Macro, Micro, and Nano-Biosensors, 225–37. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-55490-3_13.
Full textGupta, Bhavana, Shakti Singh, Swati Mohan, and Rajiv Prakash. "Urea Biosensor Based on Conducting Polymer Transducers." In Biosensors. InTech, 2010. http://dx.doi.org/10.5772/7205.
Full textMedeiros, Andrea, Lvia Maria, and Maria Alice Zarur Coelho. "Development of Potentiometric Urea Biosensor based on Canavalia ensiformis Urease." In Biosensors - Emerging Materials and Applications. InTech, 2011. http://dx.doi.org/10.5772/20163.
Full textBranzoi, Florina, and Viorel Branzoi. "Amperometric Urea Biosensor Based Metallic Substrate Modified with a Nancomposite Film." In State of the Art in Biosensors - Environmental and Medical Applications. InTech, 2013. http://dx.doi.org/10.5772/52440.
Full textMüller, C., T. Scheper, and F. Schubert. "A Three Channel Fiber Optic Biosensor for the Simultaneous Analysis of pH, Urea and Penicillin G." In Biosensors '94, 128. Elsevier, 1994. http://dx.doi.org/10.1016/b978-1-85617-242-4.50102-6.
Full textde Gràcia, J., D. Martorell, M. Poch, and S. Alegret. "Use of Mathematical Models to Desribe Dynamic Behaviour of Potentiometric Biosensors: Comparison of Deterministic and Empirical Approaches to an Urea Biosensor Flow-Through/Biosensor." In Biosensors '94, 239. Elsevier, 1994. http://dx.doi.org/10.1016/b978-1-85617-242-4.50197-x.
Full textBlidaru, Ecaterina, and Vasile Magearu. "Polymer-modified RuO2 Electrode: Studies Towards a Disposable Urea Sensor." In Biosensors '94, 229. Elsevier, 1994. http://dx.doi.org/10.1016/b978-1-85617-242-4.50187-7.
Full textBertocchi, P., D. Compagnone, and G. Palleschi. "Amperometric Determination of Ammonium and Urea with Enzyme Based Probes." In Biosensors '94, 57. Elsevier, 1994. http://dx.doi.org/10.1016/b978-1-85617-242-4.50045-8.
Full textConference papers on the topic "Urea biosensor"
Soni, Anuradha, and Sandeep K. Jha. "Saliva based noninvasive optical urea biosensor." In 2017 IEEE SENSORS. IEEE, 2017. http://dx.doi.org/10.1109/icsens.2017.8234302.
Full textJamil, Nur Akmar, Nurkhairul Bariyah Khairulazdan, P. Susthitha Menon, Ahmad Rifqi Md Zain, Azrul Azlan Hamzah, and Burhanuddin Yeop Majlis. "Graphene-MoS2 SPR-based biosensor for urea detection." In 2018 International Symposium on Electronics and Smart Devices (ISESD). IEEE, 2018. http://dx.doi.org/10.1109/isesd.2018.8605491.
Full textSaid, Fairus Atida, P. Susthitha Menon, Mohd Nuriman Nawi, Ahmad Rifqi Md Zain, Azman Jalar, and Burhanuddin Yeop Majlis. "Copper-graphene SPR-based biosensor for urea detection." In 2016 IEEE International Conference on Semiconductor Electronics (ICSE). IEEE, 2016. http://dx.doi.org/10.1109/smelec.2016.7573642.
Full textJamil, Nur Akmar Binti, P. Susthitha Menon, Gan Siew Mei, Sahbudin Shaari, and Burhanuddin Yeop Majlis. "Urea biosensor utilizing graphene-MoS2 and Kretschmann-based SPR." In TENCON 2017 - 2017 IEEE Region 10 Conference. IEEE, 2017. http://dx.doi.org/10.1109/tencon.2017.8228183.
Full textChang, Chih-Tien, Kow-Ming Chang, and Kun-Mou Chan. "Design of urea biosensor with reference systems for readout electronics." In 2009 International Semiconductor Device Research Symposium (ISDRS). IEEE, 2009. http://dx.doi.org/10.1109/isdrs.2009.5378064.
Full textJamil, Nur Akmar, P. Susthitha Menon, Fairus Atida Said, Kalaivani A. Tarumaraja, Gan Siew Mei, and Burhanuddin Yeop Majlis. "Graphene-based surface plasmon resonance urea biosensor using Kretschmann configuration." In 2017 IEEE Regional Symposium on Micro and Nanoelectronics (RSM). IEEE, 2017. http://dx.doi.org/10.1109/rsm.2017.8069122.
Full textFatoni, Amin, Zusfahair, Siti Nurfiah, Mekar Dwi Anggraeni, and Abdullah Nur Aziz. "Urea biosensor development using immobilized urease and light dependent resistor." In 1ST INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE AND ENGINEERING FOR SUSTAINABLE RURAL DEVELOPMENT. Author(s), 2019. http://dx.doi.org/10.1063/1.5097490.
Full textChung-Yuan Chen, Hsiu-Li Shieh, and Tai-Ping Sun. "Portable urea biosensor based on the extended base bipolar junction transistor." In 2010 Ninth IEEE Sensors Conference (SENSORS 2010). IEEE, 2010. http://dx.doi.org/10.1109/icsens.2010.5690778.
Full textWang, I.-Shun, Chia-Ming Yang, Yi-Ting Lin, Chi-Hsien Huang, Chao-Sung Lai, Cheng-En Lue, Tseng-Fu Lu, and Dorota G. Pijanswska. "1.2.1 Urea Biosensor Using NH3 Nitrided Amine Groups on Flexible Substrate." In 14th International Meeting on Chemical Sensors - IMCS 2012. AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 2012. http://dx.doi.org/10.5162/imcs2012/1.2.1.
Full textSitumorang, Manihar, Primsa Kaban, Rhica Ayulinova, and Wesly Hutabarat. "The Development of Sensitive and Selective Potentiometric Biosensor for Urea Assay." In Proceedings of The 5th Annual International Seminar on Trends in Science and Science Education, AISTSSE 2018, 18-19 October 2018, Medan, Indonesia. EAI, 2019. http://dx.doi.org/10.4108/eai.18-10-2018.2287315.
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