A5063295621- Coffee research and impacts
- Science and Education Research
- Polysaccharides and Plant Cell Walls
- Analytical Chemistry and Chromatography
- Meat and Animal Product Quality
- Education and Digital Technologies
- Education Pedagogy and Practices
- Synthesis and biological activity
- Phenothiazines and Benzothiazines Synthesis and Activities
- Botanical Research and Applications
- Spectroscopy and Chemometric Analyses
- Advanced Battery Technologies Research
- Agricultural and Food Sciences
- Logistics and Infrastructure Analysis
- Fermentation and Sensory Analysis
- Metabolomics and Mass Spectrometry Studies
- Fungal Biology and Applications
- Horticultural and Viticultural Research
- Insect and Pesticide Research
- Social and Political Issues
- Synthesis and Reactivity of Heterocycles
- Bee Products Chemical Analysis
- Advanced Chemical Sensor Technologies
Universidade Federal do Espírito Santo
2012-2023
Agência Nacional de Energia Elétrica
2023
Universidade Federal de São Carlos
2005-2023
Universidade Federal do Rio de Janeiro
2011
Universidade Federal de Goiás
2008
The potential of NMR spectroscopy to differentiate honeys concerning the nectar employed in its production was evaluated. application chemometric methods 1H spectra has allowed discriminate produced state São Paulo, being identified signals responsible substances for discrimination. Application PCA and HCA data have resulted natural clustering samples. Wildflower were characterized by higher concentration phenylalanine tyrosine. Citrus showed amounts sucrose than other compounds, while...
This work describes using 1H NMR data and pattern recognition analysis to classify vinegars. Vinegar authenticity is linked raw ingredient source manufacturing conditions. Application of PCA HCA methods resulted in the natural clustering samples according material used. Wine vinegars were characterized by a high concentration ethyl acetate, glycerol, methanol tartaric acid, while glycerol acetate signals not visible alcohol/agrin Apple showed be richer alanine. The KNN, SIMCA PLS-DA used...
A crescente preocupação com o meio ambiente e cenário de mudanças climáticas tem levado à reflexão sobre as tendências futuras da matriz energética mundial. Assim, setor elétrico brasileiro precisa adaptar-se às novas globais geração energia, uma vez que pressões internacionais para tornar a produção mais sustentável, eficiente menos dependente das fontes não renováveis estão cada intensas. Atualmente, principal fonte energia elétrica do país é hidráulica, no entanto, ainda há um grande peso...
The identification of gasoline adulteration by organic solvents is not an easy task, because compounds that constitute the are already in composition. In this work, use hydrogen nuclear magnetic resonance (1H NMR) with a statistical approach for identifying described. Both principal component analysis (PCA) and hierarchical cluster (HCA) from NMR data 47 commercial samples allowed distinction between conform nonconform samples. 1H NMR−PCA NMR−HCA models were evaluated through analyses 21...
COMMERCIAL COFFEE BY NMR.Coffee is one of the beverages most widely consumed in world and "cafezinho" normally prepared from a blend roasted powder two species, Coffea arabica canephora.Each exhibits differences their taste chemical composition, especially caffeine percentage.There are several procedures proposed literature for determination different samples like soft drinks, coffee, medicines, etc but them need sample workup which involves at least step purification.This work describes...
Coffee brings many health benefits due to its chemical constituents. Based on this information, it is essential know the main compounds from coffee granules; intermolecular interaction among coffees and molecular components homogeneity. In study six types of roasted commercial were evaluated by solid state nuclear magnetic resonance (NMR), employing carbon-13 (13C) hydrogen (1H) nucleus. Carbon-13 was analyzed applying high field NMR techniques, such as: magic angle spinning (MAS); with...
We report the synthesis and total NMR characterization of 5-thia-1-azabicyclo-[4.2.0]oct-2-ene-2-carboxylic acid-3-[[[(4’’-nitrophenoxy)carbonyl]oxy]-methyl]-8-oxo-7-[(2-thienyloxoacetyl)amino]-diphenylmethyl ester-5-dioxide (5), a new cephalosporinderivative. This compound can be used as carrier wide range drugs containingan amino group. The preparation intermediate product, 5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid-3-[methyl...
A aprendizagem dos conteúdos de Distribuição Eletrônica e Tabela Periódica, muitas vezes, é tida como um processo difícil pelos alunos Ensino Médio. Diante disso, a proposta deste trabalho foi elaborar aplicar, em turmas do Médio, jogo didático que aborda o conteúdo Eletrônica. pesquisa desenvolvida três escolas públicas da cidade São Mateus/ES teve finalidade verificar se utilização desta metodologia motiva aluno alcançar aprendizado. Como forma avaliação foram aplicados dois questionários;...