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Bibliographies thématiques / Hydrogen Peroxide Biosensor

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Littérature scientifique sur le sujet « Hydrogen Peroxide Biosensor »

Auteur : Grafiati

Publié le 14 mars 2023

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Thèses sur le sujet "Hydrogen Peroxide Biosensor"

1

Ndangili, Peter Munyao. "Amperometric biosensor systems prepared on poly (aniline-ferrocenium hexafluorophosphate) composites doped with poly(vinyl sulfonic acid sodium salt)." Thesis, University of the Western Cape, 2008. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_6605_1263418223.

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<p>The main hypothesis in this study is the development of a nanocomposite mediated amperometric biosensor for detection of hydrogen peroxide. The aim is to combine the electrochemical properties of both polyaniline and ferrocenium hexafluorophosphate into highly conductive nano composites capable of exhibiting electrochemistry in non acidic media<br>shuttling electrons between HRP and GCE for biosensor applications.</p>

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Arthur, Joshua N. "Hygroscopic insulator organic field effect transistor sensors." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/232689/1/Joshua_Arthur_Thesis.pdf.

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Hygroscopic insulator field effect transistors (HIFETs) are organic transistors with promising characteristics for biosensing applications. However, their fundamental sensing mechanisms are not yet fully understood. This thesis explores HIFET sensors through detailed electrical and optical characterisation, providing vital insights into the distinct mechanisms by which HIFETs detect biologically relevant chemicals. Hydrogen peroxide, a by-product of enzymatic reactions, oxidises the organic semiconductor, modulating the output current. Ionic solutions, such as KCl, NaCl and HCl, modulate the c

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Kapita, Patrick Mvemba. "Development of Measurement Systems for Biosensing Applications." Doctoral thesis, Università di Siena, 2020. http://hdl.handle.net/11365/1111250.

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A health condition called “Oxidative Stress” (OS), resulting from an excessive level of Reactive Oxygen Species (ROS) is a “state harmful to the body, which arises when oxidative reactions exceed antioxidant reactions because the balance between them has been lost”[1] OS appears to be associated with and might be a cause of, many serious diseases such as cardio-vascular accidents, cancer, Parkinson’s and Alzheimer’s[2]. This is not surprising as ROS are free oxygen radicals that can attack lipids, proteins, cellular membranes, enzymes and even modify DNA. Extensive correlation studies have s

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Araminaitė, Rūta. "Study of electrocatalytic processes at Prussian blue modified glassy carbon electrode." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100213_101926-62386.

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The main purpose of this work is study of electrochemical hydrogen peroxide and ascorbate reactions on electrodes modified by Prussian blue (PB), with the aim to apply these electrodes in creation of sensors and biosensors. For this purpose, a detailed study of electrochemical reduction of hydrogen peroxide, as well as of oxidation of ascorbate at Prussian blue modified rotating disk electrode. In view of the results obtained, a mechanism for hydrogen peroxide reduction at PB modified electrode has been proposed. In accordance with this mechanism, electron transfer appears to be rate-limiting

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Araminaitė, Rūta. "Elektrokatalizinių procesų tyrimas ant Berlyno mėlynuoju modifikuoto stiklo anglies elektrodo." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100213_101935-42979.

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Darbo tikslas yra elektrocheminių vandenilio peroksido ir askorbato reakcijų tyrimas ant Berlyno mėlynuoju (BM) modifikuotų elektrodų, siekiant pritaikyti šiuos elektrodus jutiklių ir biojutiklių kūrimui. Ištirta vandenilio peroksido redukciją ir askorbato oksidaciją naudojant sukamojo disko elektrodą. Gauti rezultatai galimai įrodo stadijinį vandenilio peroksido katodinės redukcijos mechanizmą vykstantį ant BM modifikuoto elektrodo. Detaliai ištirta BM sluoksnio irimo kinetika vandenilio peroksido elektroredukcijos metu, ir nustatyti faktoriai, įtakojantys irimo proceso greitį. Sukurti jutikl

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Mendes, Renata Kelly. "Investigação dos efeitos dos procedimentos de imobilização em monocamadas auto-organizadas da enzima peroidase no desenvolvimento de um biossensor." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/248400.

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Orientador: Lauro Tatsuo Kubota<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Quimica<br>Made available in DSpace on 2018-08-10T12:02:32Z (GMT). No. of bitstreams: 1 Mendes_RenataKelly_D.pdf: 1152307 bytes, checksum: c6e7b97417285a7bb4d70d28ba880353 (MD5) Previous issue date: 2006<br>Resumo: Neste trabalho foram investigados diferentes métodos de imobilização da enzima HRP empregando como matrizes as monocamadas auto-organizadas formadas sobre eletrodos de ouro, bem como a avaliação da influência do processo de imobilização do elemento biológico no desempenho analític

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Gonçales, Vinícius Romero. "Nanoestruturação de filmes finos para utilização em eletrodos enzimáticos." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-31012012-141924/.

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Os desafios atuais no desenvolvimento de biossensores abrangem diversos aspectos, tais como a necessidade de se aperfeiçoar a interface de contato entre o substrato e o material biológico, a eficiência de transdução do sinal químico em um sinal mensurável, o tempo de resposta, a compatibilidade dos biossensores com matrizes biológicas e a integração de diferentes elementos de reconhecimento biológico em um único dispositivo, visando a detecção de distintos analitos. Nesse contexto, o desenvolvimento da nanociência tem criado recursos bastante atraentes para otimizar os aspectos descritos acima

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Valencia, Germán Ayala. "Transporte eletrônico em biofilmes nanoestruturados para biossensores a base de enzimas." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/74/74132/tde-10072013-095546/.

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Os biossensores são dispositivos empregados para a detecção de um analito específico, podendo assim ser no controle de qualidade nos alimentos para determinar a presença de micro-organismos, toxinas ou metabólitos. O presente estudo objetiva desenvolver um biossensor condutométrico, baseado na imobilização de peroxidasse em membranas de quitosana e quitosana com nanopartículas de ouro (AuNP) para a detecção de peroxido de hidrogênio. O trabalho foi dividido em três etapas. Na primeira etapa foi estudada a obtenção de AuNP empregando agentes redutores biológicos, sendo avaliados três monossacar

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Jhai, You-syuan, and 翟祐暄. "Fabrication of Amperometric Hydrogen Peroxide Biosensor Based on Trisoctahedral Nano-Metallic Catalyst and its Applications." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/7a9fgh.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>100<br>This study was comprised of two parts: (I) the synthesis of trisoctahedral gold nanocrystal (AuNC) and core-shell AuNCs@Pt catalysts for the applications of electrochemical sensing of hydrogen peroxide; (II) the immobilization of enzymatic species by adding cross-linking agent to fabricate electrochemical glucose sensor. For the first part, the surface morphology and crystal lattice of the synthesized nano-metallic catalysts were investigated using SEM, XRD. The synthesized AuNCs showed many active sites due to their polyhedral structure. In order to enhance t

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Kosto, Yuliia. "Studium tenkých vrstev oxidu ceru pro biosenzorické aplikace." Doctoral thesis, 2021. http://www.nusl.cz/ntk/nusl-439696.

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Title: Study of cerium oxide thin films for biosensing applications Author: Yuliia Kosto Department: Department of Surface and Plasma Science Supervisor: Prof. RNDr. Vladimír Matolín, DrSc. Abstract: The presented scientific work was conducted in two main directions. The first one is an investigation of the simple biomolecules (glycine and sarcosine) bonding to cerium oxide model films by surface science techniques: photoelectron and near-edge X-ray absorption spectroscopies. Adsorption chemistry and thermal stability of the molecules on the oxides were studied in relation to the oxidation sta

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