Amperometric Biosensors
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Desenvolvimento de biossensor contendo polifenoloxidases de sementes de jatobá para análise ambiental / Developmento of biosensor containing polyphenoloxidase jatobá seed for environmental analysis
The polyphenoloxidase (PPO) is responsible for catalyzing the conversion of phenolic compounds to quinones in the presence of oxygen. This enzyme is widely used in biosensor production and selective evaluation of phenol content in industrial effluents. In this work a biosensor modified with enzyme extract containing polyphenoloxidase from Hymenaea stigonocar
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/09/2011
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2. Synthesis, characterization and application of poly(3- hydroxyphenylacetic acid) in the development of a biosensor for detection of cardiac marker / Síntese, caracterização e aplicação do poli (ácido 3-Hidroxifenilacético) no desenvolvimento de biossensor para detecção de marcador cardíaco
Neste trabalho foram realizados estudos de caracterização de um novo material, o poli(ácido 3-hidroxifenilacético) e sua aplicação para construção de um imunossensor amperométrico para detecção do Infarto Agudo do Miocárdio (IAM). Inicialmente, foi realizada a eletropolimerização do ácido 3-hidroxifenilacético em três pHs diferentes (0,0; 6,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/02/2011
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3. Low potential stable glucose detection at dendrimers modified polyaniline nanotubes
The utilization of nanostructured materials for development of biosensors is a growing field in medical diagnostics. In this work a glucose biosensor based on bioactive polyglycerol (PGLD) and chitosan dendrimers (CHD) was developed. PGLD and CHD were bioconjugated with the enzyme glucose oxidase (GOx) to obtain dendrimers with glucose sensing properties. Po
Materials Research. Publicado em: 2010-03
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4. Layer-by-Layer assembly of carbon nanotubes applied in sensing / Filmes automontados de nanotubos de carbono aplicados em sensores
Carbon nanotubes (CNTs) are versatile in enhancing the properties of other materials. They can be integrated with biological materials, for instance, in the fabrication of biosensors with optimized sensitivity and performance. With manipulation of CNTs in nanostructured films, one may form hybrid nanocomposites whose synergistic interaction requires experime
Publicado em: 2010
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5. DESENVOLVIMENTO DE MÉTODOS EMPREGANDO SPME-GC/MS E BIOSSENSORES AMPEROMÉTRICOS PARA ANÁLISE DO INSETICIDA PARATION METÍLICO EM AMOSTRAS DE ARROZ IN NATURA / DEVELOPMENT AND METHODS EMPLOYING SPME-GC/MS AMPEROMETRIC BIOSENSOR FOR METHYL PARATHION ANALYSIS OF PESTICIDE IN SAMPLES OF RICE IN NATURA
Os inseticidas organofosforados, em especial aqueles à base do princípio ativo paration metílico, têm sido extensivamente usados na proteção de cultivos de arroz no Estado do Maranhão. Neste trabalho, foi otimizado um método cromatográfico para determinação do inseticida paration metílico usando microextração em fase sólida em ambiente confina
Publicado em: 2010
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6. Use of biomimetic systems at the preparation of amperometric sensors / Utilização de sistemas biomiméticos no Preparo de sensores amperométricos
This work describe the immobilization of the copper(II) dinuclear complex ([Cu2(apyhist)2Cl2](ClO4)2), (apyhist =[(4-imidazolyl)ethylene-2-amino-1-ethylpyridine]), and others similar copper(II) compounds mono- and tetranuclears, obtained in water solution or for desprotonation of the imidazole ligant, in the Nafion membrane on glass carbon electrode surface,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/09/2009
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7. Desenvolvimento de um biossensor amperomÃtrico de DNA para detecÃÃo do PapilomavÃrus humano
The cervical cancer has been a serious problem in Brazil and in the world wuith about 18.680 infected woman annually. The Human Papillomavirus (HPV) has been biologically associated with the development of cervical lesions, due to its capacity to infect epithelial cells and progress to cervical uterine cancer. The late screening may unviable the treatment, l
Publicado em: 2008
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8. Synthesis and characterization of copper hexacyanoferate nanoparticles and its application in Glucose Biosensor and electrochromics electrodes / Síntese e caracterização de nanopartículas de hexacianoferrato de cobre e sua aplicação em biossensores de glicose e eletrodos eletrocrômicos
In this work, the sonochemical synthesis and the characterization of copper hexacyanoferrate nanoparticles for producing ultra thin films with controlled thickness is reported. Due to its nanometric structure and the excess of superficial negative charges, the proposed immobilization methods were the electrostatic deposition layer by layer (LBL), using the P
Publicado em: 2007
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9. Development, characterization and utilization of a enzymatic nanobiosensor for a carbaryl determination / Desenvolvimento, caracterização e utilização de um nanobiossensor enzimático para a determinação da carbaril
Since the discovery of carbon nanotubes, a great interest in exploring their applications has raised, being one of those the modification of electrodes. Many works has shown the advantages of applying glassy carbon electrodes modified with carbon nanotubes and enzymes. These systems present elevated amperometric response with decreased potentials of oxidatio
Publicado em: 2007
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10. Glucose microsensor integrated into a catheter / Microssensor para glicose integrado a catéter
The development of electrochemical sensors for glucose integrated into catheters has as basic requisite its miniaturization and the requirement of functioning for relatively long periods in the intravenous environment. The function of such sensors is the continuous monitoring on real time of the clinical evolution of patients hospitalized in intensive therap
Publicado em: 2007
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11. Utilização de técnicas eletroanalíticas na determinação de pesticidas em alimentos
The aim of this work is to discuss selected applications of electroanalytical techniques for the detection of pesticides in foods and beverages, published in the last ten years. The applications involved different working electrodes for the electroanalytical determination of pesticides, namely amperometric biosensors, cholinesterase-based biosensors, polymer
Química Nova. Publicado em: 2006-02
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12. Enzymeless biosensors: uma nova área para o desenvolvimento de sensores amperométricos
The aim of this work is to describe the recent area that it has been developed for the construction of amperometric sensors, with the purpose to make possible a more effective electron transfer between enzyme and electrode. The advances reported in the literature will be described, such as enzymatic configurations that can be mimic using the chemistry of the
Química Nova. Publicado em: 2002-02