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Identification of Saccharomyces cerevisiae strains for alcoholic fermentation by discriminant factorial analysis on electronic nose signals Electron. J. Biotechnol.
Calderon-Santoyo,Montserrat; Chalier,Pascale; Chevalier-Lucia,Dominique; Ghommidh,Charles; Ragazzo-Sanchez,Juan Arturo.
An electronic nose (E-nose) coupled to gas chromatography was tested to monitor alcoholic fermentation by Saccharomyces cerevisiae ICV-K1 and Saccharomyces cerevisiae T306, two strains well-known for their use in oenology. The biomass and ethanol concentrations and conductance changes were measured during cultivations and allowed to observe the standard growth phases for both yeast strains. The two strains were characterized by a very similar tendency in biomass or ethanol production during the fermentation. E-nose was able to establish a kinetic of the production of aroma compounds production and which was then easy to associate with the fermentation phases. Principal Component Analysis (PCA) showed that the data collected by E-nose during the...
Tipo: Journal article Palavras-chave: Alcoholic fermentation; Discrimination; Electronic nose; Gas sensor; Yeasts.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000400008
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Evaluation of an electronic nose system for characterization of pomegranate varieties CIGR Journal
Sanaeifar, Alireza; Mohtasebi, Seyed Saeid; Ghasemi-Varnamkhasti, Mahdi; Mohammad Shafie, Mohammad.
The electronic nose (e-nose) would simulate the human sense (smell) to identify and realize the complex aromas by employing a chemical sensors array. One of the most common sensors used in electronic nose systems are metal oxide semiconductor (MOS) sensors. In this research, a low cost e-nose system based on six metal oxide semi-conductor (MOS) sensors as a non-destructive instrument for recognition pomegranate varieties is investigated. Principal component analysis (PCA) and linear discriminant analysis (LDA) techniques are used for this purpose. The proposed e-nose has a capability of demonstrating a clear difference in aroma fingerprint of pomegranate by PCA and LDA analysis. Using LDA analysis, it is possible to identify and to categorize the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Electronic nose; Linear discriminant analysis; Non-destructive; Pomegranate; Principal component analysis.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3799
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The use of actometry and electronic nose devices to assess the locomotor activity of two species of Coccinellidae (Coleoptera) Ciencia e Investigación Agraria
Heit,Guillermo; Messina,Valeria; Mareggiani,Graciela; Cohen,Rosa; Carrizo,Paola.
The effect of odor signals on the locomotor activity of Cycloneda sanguinea and Harmonia axyridis was evaluated using two different actometric devices. The purpose of the analysis was to differentiate between the responses elicited by direct contact with the substrates and the responses that occurred if the coccinellids were exposed only to volátiles and had no direct substrate contact. The odor profile of the environmental volátiles (semiochemicals) in the bioassays was analyzed using an electronic nose (Modular Sensor System Moses II). The treatments used included volatiles emitted by pepper leaves (healthy or infested with Myzus persicae), M. persicae molts and honeydew, and healthy leaves treated with an artificial inducer of the systemic acquired...
Tipo: Journal article Palavras-chave: Acibenzolar-S-methyl; Coccinellidae; Electronic nose; Locomotor activity; Semiochemicals.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000200012
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