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Registros recuperados: 8
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Agri S&T: technological information for development. Infoteca-e
EMBRAPA..
A new look, Northeast, Cassava with lycopene, Food safety, Cooperativism.
Tipo: Outras publicações técnicas (INFOTECA-E) Palavras-chave: Tracing cattle; Functional genome; Electronic tongue; Soybean; Agricultura.
Ano: 2002 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/1033844
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An electronic tongue for gliadins semi-quantitative detection in foodstuffs IPB - Escola Superior Agrária
Peres, António M.; Dias, L.G.; Veloso, Ana C.A.; Meirinho, Sofia G.; Morais, Jorge Sá; Machado, A.A.S.C..
An all-solid-state potentiometric electronic tongue with 36 polymeric membranes has been used for the first time to detect gliadins, which are primarily responsible for gluten intolerance in people suffering from celiac disease. A linear discriminant model, based on the signals of 11 polymeric membranes, selected from the 36 above using a stepwise procedure, was used to semi-quantitatively classify samples of a “Gluten-free” foodstuff (baby milked flour), previously contaminated with known amounts of gliadins (<10, 20–50 or >50 mg/kg), as “Gluten-free”, “Low-Gluten content” or “Gluten-containing”. For this food matrix, the device had sensitivity towards gliadins of 1–2 mg/kg and overall sensitivity and specificity of 77% and 78%, respectively....
Tipo: Article Palavras-chave: Gliadins; Electronic tongue; Linear discriminant analysis; Celiac disease; Protein analysis.
Ano: 2011 URL: http://hdl.handle.net/10198/3819
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An electronic tongue for honey classification IPB - Escola Superior Agrária
Dias, L.G.; Peres, António M.; Vilas-Boas, Miguel; Rocha, Maria A.; Estevinho, Leticia M.; Machado, A.A.S.C..
An electronic tongue system was developed based on 20 all-solid-state potentiometric sensors and chemometric data processing, with polymeric membranes applied on solid conducting silver-epoxy supports and a Ag=AgCl reference electrode. The sensor array was applied to 52 commercial honey samples obtained randomly from different regions of Portugal. These samples were analysed independently for their pollen profiles by biological techniques and the data collected with the tongue were evaluated for discrimination of the samples with multivariate statistical methods (principal component analysis and linear discriminant analysis), to investigate whether the device may provide an analytical alternative for classification of honey samples with respect to pollen...
Tipo: Article Palavras-chave: Honey; Pollen; Electronic tongue; Multivariate analysis.
Ano: 2008 URL: http://hdl.handle.net/10198/1027
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An electronic tongue for juice level evaluation in non-alcoholic beverages IPB - Escola Superior Agrária
Peres, António M.; Dias, L.G.; Barcelos, T.P.; Morais, Jorge Sá; Machado, A.A.S.C..
An electronic tongue with 36 cross-sensibility polymeric membranes was built and used for semi-quantitative analysis of beverages. The objective was to differentiate 4 non-alcoholic beverage groups with different added fruit juice contents: higher than 30%, between 14%-30%, 5%-10% and 0.1%-2%. A set of 16 Portuguese beverages (4 for each group), purchased in commercial supermarkets, was analyzed and the respective signal profiles recorded by the electronic tongue device. The data obtained were treated by stepwise linear discriminant analysis, allowing a 100% overall correct classification for the original grouped cases and a 93.8% for the “leaving one-out” cross-validation procedure
Tipo: Article Palavras-chave: Discriminant analysis; Electronic tongue; Fruit juice level; Non-alcoholic beverages; Polymeric membranes.
Ano: 2009 URL: http://hdl.handle.net/10198/2232
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An electronic tongue taste evaluation: identification of goat milk adulteration with bovine milk IPB - Escola Superior Agrária
Dias, L.G.; Peres, António M.; Veloso, Ana C.A.; Reis, F.S.; Vilas-Boas, Miguel; Machado, A.A.S.C..
An electronic tongue with 36 cross-sensibility sensors was built allowing a successful recognition of the five basic taste standards, showing high sensibility to acid, salty and umami taste substances and lower performance to bitter and sweet tastes. The taste recognition capability was afterwards tested in the detection of goat milk adulteration with bovine milk, which is a problem for the dairy industry. This new methodology is an alternative to the classical analyticalmethods used to detect caprine milk adulterations with bovine milk, being a simpler, faster and economical procedure. The different signal profiles recorded by the e-tongue device together with linear discriminant analysis allowed the implementation of a model that could distinguish...
Tipo: Article Palavras-chave: Electronic tongue; Taste standards; Milk adulteration; Cow milk; Goat milk; Principal component analysis; Linear discriminant analysis.
Ano: 2009 URL: http://hdl.handle.net/10198/1029
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Printed circuit board electrodes modified with nanostructured films: use in the electronic tongue. Repositório Alice
MARTINS, T.; SCAGION, V. P.; ALLERDING, L.; CARMO, M. S.; OLIVEIRA, J. E.; MATTOSO, L. H. C.; CORREA, D. S..
2012
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Electronic tongue; Interdigitated electrode.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/946034
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Semi-quantitative and quantitative analysis of soft drinks using an electronic tongue IPB - Escola Superior Agrária
Dias, L.G.; Peres, António M.; Barcelos, Tânia P.; Morais, Jorge Sá; Machado, Adélio A.S.C..
A potentiometric electronic tongue with 36 cross-sensibility lipo/polymeric membranes was built and applied for semi-quantitative and quantitative analysis of non-alcoholic beverages. A total of 16 commercial fruit juices (e.g., orange, pineapple, mango and peach) from five different brands were studied. In the semi-quantitative approach, the signal profiles recorded by the device were used together with a stepwise linear discriminant analysis to differentiate four beverage groups with different fruit juice contents: >30%, 14–30%, 6–10% and <4%. The model, with two discriminant functions based on the signals of only four polymeric membranes, explained 99% of the total variability of experimental data and was able to classify the studied samples into...
Tipo: Article Palavras-chave: Electronic tongue; Soft drinks; Fruit juice; Fructose; Glucose; Principal components analysis.
Ano: 2011 URL: http://hdl.handle.net/10198/6407
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Study on the flavour of soybean cultivars by sensory analysis and electronic tongue. Repositório Alice
SILVA, J. da; PRUDENCIO, S.; CARRÃO-PANIZZI, M. C.; GREGORUT, C.; FONSECA, F.; MATTOSO, L. H. C..
2012
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Soja; Electronic tongue; Flavour; Principal component analysis; Quantitative descriptive analysis; Sensory analysis; Soybean cultivars; Língua eletrônica; Aroma; Análise sensorial; Análise quantitativa; Alimentação humana.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/931002
Registros recuperados: 8
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