- Analytical Chemistry and Sensors
- Analytical chemistry methods development
- Microfluidic and Capillary Electrophoresis Applications
- Electrochemical sensors and biosensors
- Analytical Chemistry and Chromatography
- Education Pedagogy and Practices
- Water Quality Monitoring and Analysis
- Education and Digital Technologies
- Electrochemical Analysis and Applications
- Public Health in Brazil
- Muscle metabolism and nutrition
- Science and Education Research
- Water Quality and Pollution Assessment
- Linguistics and Education Research
- Youth, Drugs, and Violence
- Education during COVID-19 pandemic
- Hormonal and reproductive studies
- Health, Nursing, Elderly Care
- Flowering Plant Growth and Cultivation
- Environmental Chemistry and Analysis
- Mass Spectrometry Techniques and Applications
- Phytochemistry Medicinal Plant Applications
- Water Treatment and Disinfection
- Metabolomics and Mass Spectrometry Studies
- Water Quality Monitoring Technologies
Universidade Federal do Rio de Janeiro
2015-2024
Rede de Química e Tecnologia
2003-2023
Universitat de València
2007
Universidade de São Paulo
2003-2007
Universidade Federal de São Carlos
2003
Universidade do Porto
2003
Peppers (Capsicum sp.) are used both as vegetables and/or spice and their fruits in a plethora of recipes, contributing to flavor aroma. Among flavor-related traits, pungency (capsaicinoids) lately volatiles have been considered the most important factors. However, knowledge sugars is low, probably due fact peppers were historically tasteless. Here, using HPLC, we studied content profile major capsaicinoids comprehensive collection varietal types (genotype, G), grown under different growing...
Abstract An automatic flow procedure for cholesterol determination in animal blood serum using enzymatic reaction and detection by chemiluminescence is described. Cholesterol esterase oxidase were immobilized on glass beads packed into two mini-columns (15 mm × 5 mm), which coupled to system. Produced H2O2 reacted with luminol produced that was detected a solid-state detector. The system comprised set of three-way solenoid valves assembled implement multicommutation. A microcomputer an...
An automatic flow-analysis procedure for spectrophotometric determination of cationic surfactants in surface water using a solenoid micro-pump propelling solutions reagents and sample is described. The proposed method based on ternary formation complex between chromazurol S, the Fe(III) ion, surfactant. flow network comprised four micro-pumps controlled by microcomputer, which performed sampling step loading reaction coil with reagent displacing zone through analytical path. system simple,...
A multi-pumping flow system with improved mixing conditions is proposed for chemiluminescent determination of ammonium in natural waters. The includes a gas-diffusion unit, Y-connector made sintered glass particles (100–200 mesh), and chemiluminometric detector. System configuration, rates, reagent concentrations, pH, reactor lengths were optimized. analytical curve linear from 0.3 to 5.0 mg L−1 N-NH4, the detection limit estimated as 0.02 at 99.7% confidence level. handles about 50 samples...
An automatic flow procedure based on the multicommutation concept, comprising three-way solenoid valves, for spectrophotometric determination of 3-hydroxybutyrate in animal serum and plasma is proposed. The was enzymatically converted to acetoacetate with reduction NAD+ NADH monitored at 340 nm. It possible carry out up 600 determinations without a significant decrease analytical signal, 5 mg dehydrogenase immobilized porous silica beads packed column. system enabled 60 determinations/h...
A chemiluminescence procedure for the determination of carbaryl in natural waters using acetylcholinesterase and choline oxidase is described. The flow system designed to implement multicommutation approach controlled by microcomputer comprised five solenoid valves, two columns with immobilized enzymes on pore glass beads chemiluminometric cell. In best experimental conditions a linear response ranging from 25 700 µg L-1 was obtained. Water samples were spiked order access accuracy...
An automatic flow procedure based on multicommutation dedicated for the determination of glucose in animal blood serum using oxidase with chemiluminescence detection is described. The manifold consisted a set three‐way solenoid valves assembled to implement multicommutation. A microcomputer furnished an electronic interface and software written Quick BASIC 4.5 controlled performed data acquisition. Glucose was immobilized porous silica beads (glass aminopropyl) packed minicolumn (15 } 5 mm)....
BLOOD EMPLOYING A MULTICOMMUTATION FLOW SYSTEM.Automatic flow procedures based on the multicommutation concept, dedicated to determination of 3-hydroxybutyrate, glucose and cholesterol are proposed.The enzymes were immobilized glass beads packed into mini-columns that coupled a system.Sampling throughputs 55, 40 determinations per hour, linear response from 10 150, 50 600, 25 125 mg L -1 , detection limits 1.5, 14 4 relative standard deviations 1, 2 2% for cholesterol, respectively, achieved.
Medication standardization consists of a medication selection tool that seeks to compose the therapeutic arsenal hospitals and health units, acting as an ally pharmaceutical services, promoting improvements in hospital management.The objective was understand clinical care profile public Northern Fluminense Region, order propose scheme their rational use based on hospital's demand.Through retrospective observational study collected from RAG -Annual Management Reports made available by...
The study addresses the importance of treating wastewater, such as water from human activities (domestic, industrial, agricultural), before it is discharged into environment. presence nitrate and nitrite ions in these waters a concern, they are harmful to health. objective this evaluate different analytical techniques measure amount industrial effluents river water. samples were collected Timóteo, region with steel industries. collections made at three treatment points industry Timotinho...
O presente trabalho apresenta uma investigacao das relacoes que se estabelecem entre a sala de aula e o Espaco Virtual Aprendizagem (EVA) quando este introduzido nas acoes ensino-aprendizagem aulas Quimica com um publico jovens adultos. Foi planejada proposta didatica articulacao os ambientes presencial virtual aprendizagem orientada pela pedagogia problematizadora Paulo Freire estruturada em momentos pedagogicos. A partir da foi delineado experimento didatico abordou eletroquimica, foco...
This paper presents an investigation of the relationships established between classroom and Virtual Learning Space (VLS) when it is introduced in actions teaching learning chemistry classes involving youth adults.It was planned a didactic proposal for articulation face-to-face VLS guided by special pedagogy Paulo Freire structured pedagogical moments.From designed experiment that dealt with electrochemistry, focusing on spontaneous redox reactions batteries.The e aluatio dida ti pe i t as...
A atenção farmacêutica é a prática na qual o farmacêutico utiliza ato profissional para orientar sobre uso correto e seguro de medicamentos. Essa atuação pode ser otimizada mediante trabalho interprofissional práticas colaborativas sustentar ações integradas mais resolutivas. Tendo em vista que, saúde do idoso ainda considerada um complexo problema pública devido vulnerabilidade à polifarmácia, objetivamos analisar as evidências literatura no contexto colaborativo acompanhamento...
A Pandemia da COVID-19, decreta em março de 2020 pela Organização Mundial Saúde (OMS), causou grandes impactos econômicos, educacionais, sanitários, sociais, políticos, financeiros e crises na saúde, fundamentado recomendação distanciamento social. Neste sentido muitas escolas instituições ensino superior precisaram interromper as atividades presenciais. Os órgãos governamentais oferecer uma educação segura longe riscos contaminação do coronavírus, através remota, usando Tecnologias Digitais...
O uso racional de plantas medicinais, como matéria-prima medicamentos, requer o controle qualidade, podendo-se utilizar marcadores morfo-anatômicos das drogas vegetais. Este trabalho teve por objetivo a determinação características farmacognósticas folhas cinco espécies reconhecidas popularmente “boldo”. Utilizou-se métodos Farmacopeicos para realização análises macro e microscópica Peumus boldus, Vernonia condensata, Plectranthus amboinicus, barbathus ornatus. Características...
A cidade de Rio das Ostras, no Janeiro, e uma emancipacao relativamente recente o estudo condicoes da qualidade hidrogeologica dos seus bairros importante neste contexto, pois revela os impactos urbanizacao municipio. O bairro Enseada Gaivotas area onde estas analises se fazem especialmente necessarias, ja que em seu arredor existe unidade conservacao ambiental, as atividades humanas local podem influenciar alterar negativamente ambiente local, comprometendo anseios comunidade, bem como...