17 documents found, page 1 of 2
Enose lab made with vacuum sampling: quantitative applications
Teixeira, Guilherme Gobbi; Peres, António M.; Estevinho, Leticia M.; Geraldes, Pedro; Garcia-Cabezon, Cristina; Martin-Pedrosa, FernandoA lab-made electronic nose (Enose) with vacuum sampling and a sensor array, comprising nine metal oxide semiconductor Figaro gas sensors, was tested for the quantitative analysis of vapor–liquid equilibrium, described by Henry’s law, of aqueous solutions of organic compounds: three alcohols (i.e., methanol, ethanol, and propanol) or three chemical compounds with different functional groups (i.e., acetaldehyde, ...
Amino acids profile for assessing Serra da Estrela cheese producers
Santos, A. O.; Falcão, Soraia; Fontes, Luísa; Veloso, Ana C. A.; Lemos, Edite Teixeira de; Lima, M. J. Reis; Peres, António M.; Dias, L. G.This work has the purpose to evaluate if the Serra da Estrela cheeses colletcted from 6 producers have typical chemical characteristics, with controlled variability, considering that cheeses were produced during time periods, the raw milk comes from different animals, and that the cheese processing may slightly differ between cheesemaking producers.; info:eu-repo/semantics/publishedVersion
Discrimination of three bacteria species using a potentiometric electronic tongue
Teixeira, Guilherme Gobbi; Katel, Anna; Veloso, Ana C. A.; Dias, L. G.; Dias, Teresa; Peres, António M.[Excerpt] The detection, monitoring and/or prevention of microorganism growing is of utmost relevance in several research fields, from food to environmental areas, being an important topic either from an academic or an industrial point of view. Conventional methods like plating techniques are the most widely used, being needed novel and faster screening methodologies like electronic noses, electronic tongues (E...
Electrochemical aptasensor array for multiple detection of human osteopontin
Meirinho, S.; Dias, L. G.; Peres, A. M.; Rodrigues, L. R.Electrochemical aptasensor arrays have been recently used to detect several proteins reported as disease biomarkers, mainly due to their known advantages, that include high affinity, sensitivity, specificity and low costs, among others. This study describes the development of a label-free electrochemical multi-aptasensor array, for the simultaneous detection of human osteopontin (OPN), using two specific aptame...
Classification of single-cultivar Tunisian olive oils according to the geograph...
Souayah, Fatma; Rodrigues, Nuno; Veloso, Ana C. A.; Dias, L. G.; Oueslati, Souheib; Oueslati, Souheib; Peres, António M.Developing analytical techniques for EVOO authentication is a challenging task. Moreover, if a specific meteorological or geographical factor affects different geographical regions similarly, olive oils' geographical discrimination may be a hard task. Improved classification of olive oils may be achieved by combining electrochemical fingerprints with multivariate statistical techniques. In this work, we used an...
Electronic tongues and aptasensors
Dias, L. G.; Meirinho, S. G.; Veloso, Ana C. A.; Rodrigues, L. R.; Peres, A. M.The development of bioinspired sensors has emerged and grown in recent decades, given their broad and exciting applications to pharmaceutical formulations, medical diagnosis and health care. These sensor-based technologies, owing to their function and to the elements involved in their design, potentially generate fast, selective, sensitive, safe and green analysis solutions. Their applications have evolved into...
Discriminação de soluções padrão de defeitos sensoriais associados à fermentaçã...
Marx, Ítala; Rodrigues, Nuno; Dias, L. G.; Veloso, Ana C. A.; Pereira, J. A.; Drunkler, Deisy A.; Peres, António M.[Extrato] De acordo com os dados do Sistema de lnformarção sobre o Azeite e a Azeitona de Mesa a produrção de azeitonas de mesa em Portugal na campanha 2015-2016 aumentou 11% em relação a ultima campanha. Atendendo a importancia deste produto na fileira oleicola, o Conselho Oleicola Internacional vem implementando diretrizes para a seleção e treino de paineis sensoriais capazes de classificar o produto de acord...
Application of an electronic tongue for evaluating basic gustatory attributes p...
Marx, Ítala; Rodrigues, Nuno; Dias, L. G.; Veloso, Ana C. A.; Pereira, J. A.; Drunkler, Deisy A.; Peres, António M.[Excerpt] The organoleptic evaluation of table olives aiming their commercial classification according to sensory trade categories, although not being legally required, is recommended by the International Olive Council. This classification is based on the organoleptic evaluation of negative attributes usually found in table olives (and their respective brine solutions), performed by trained sensory panels. Howe...
Qualitative evaluation of Tunisian olive oils using an electronic tongue and ch...
Slim, Souihli; Rodrigues, Nuno; Dias, L. G.; Veloso, Ana C. A.; Pereira, J. A.; Oueslati, Souheib; Peres, António M.Olive oil commercialization has a great impact in the regional economy of several countries including Tunisia. It is a high-value food product, quite prone to frauds. So, it is important to establish analytical techniques that can ensure labelling correctness regarding olive oil quality as well as its origin, namely concerning the olive(s) cultivar(s) used in the production, which is of major importance for mon...
Olive oils qualitative evaluation using a potentiometric electronic tongue: a r...
Dias, L. G.; Rodrigues, Nuno; Veloso, Ana C. A.; Pereira, J. A.; Peres, António M.Olive oil is a food product highly prone to fraud, including mislabeling of olive oil commercial category, geographical or olive cultivar origin. Several analytical techniques have been reported to assess olive oil quality, authenticity as well as to detect possible adulterations, namely gas-, liquid- and mass-spectrometry chromatography, DNA and spectroscopy based methods. However, in general, these techniques...