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3D front-face fluorescence spectroscopy for characterization of extra virgin olive oil and olive oil according to the spectral pattern CIGR Journal
Lleó, Lourdes; Hernández-Sánchez, Natalia; Ammari, Faten; Roger, Jean-Michel.
3D front-face fluorescence spectroscopy and principal component analysis (PCA) were used to differentiate between Extra Virgin Olive (EVOO) and Olive Oil (OO). The results show that 3D front-face fluorescence could be an effective tool to characterize EVOO and OO. Fourteen samples of olive oils were acquired directly from producers and from retail markets and their 3D fluorescence spectra were measured and analyzed. The first principal component of the PCA model retained the most important variability as a combination of freshness due to the presence of antioxidant compounds and chlorophyll; and of oxidation stage due to the presence of oxidation products. Olive oil samples presented different spectral pattern providing different scores for EVOO and OO in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Food quality fluorescence spectroscopy; Olive oil; Quality assessment; Authentication.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3699
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Chlorophyll fluorescence as a predictive method for detection of browning disorders in 'Conference' pears and 'Jonagold' apples during controlled atmosphere storage Ciência Rural
Saquet,Adriano Arriel; Streif,Josef.
The chlorophyll fluorescence technique was evaluated as a possible predictive and nondestructive method to detect low-O2 and/or high-CO2 injuries in 'Conference' pears and 'Jonagold' apples stored in controlled atmosphere (CA). The fruits were kept at 0°C in air, 1% CO2 + 2% O2 or 3% CO2 + 1% O2 during five months. Fluorescence parameters of minimal fluorescence (Fo), maximal fluorescence (Fm), and potential quantum yield - (Fm-Fo):Fm, also denoted as Fv:Fm- as well as the incidence of browning disorders were evaluated at several times during storage. No incidence of browning disorders was observed in 'Jonagold' apples, however, they showed a decrease in Fv:Fm during storage time with no differences between the CA-conditions. Air-stored apples showed a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fruits; Quality assessment; Physiological disorders.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782002000400004
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Evaluation de la qualité des eaux littorales de la France métropolitaine pour l'élément de qualité Phytoplancton dans le cadre de la DCE. Etat des lieux des règles d’évaluation, et résultats pour la période 2007‐2012. Tome 1 ‐ Etat des lieux, méthodes et synthèse des résultats ArchiMer
Belin, Catherine; Lamoureux, Alice; Soudant, Dominique.
Ce rapport en deux tomes détaille les résultats de l’évaluation, avec les règles de la DCE (Directive Cadre sur l’Eau), de l’élément de qualité phytoplancton dans les masses d’eau de la France métropolitaine. Cette évaluation est réalisée à partir des données acquises sur la période 2007-2012. Le tome 1 contient également un état des lieux des grilles d’évaluation de l’indicateur phytoplancton qui sont applicables en 2014 pour les eaux littorales, et replace cette évaluation dans son contexte réglementaire, en rappelant les exigences de la DCE pour l’élément de qualité phytoplancton, et en donnant des informations sur l'historique et l’avancement des travaux d’inter-calibration et l’état des décisions au niveau européen. Il fait le point sur l’avancement...
Tipo: Text Palavras-chave: DCE; Phytoplancton; Évaluation qualité; Masses d’eau; Métriques d’évaluation; Grilles d’évaluation; Valeurs de référence; WFD; Phytoplankton; Quality assessment; Water bodies; Evaluation metrics; Evaluation grids; Reference values.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00394/50490/51227.pdf
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Evaluation de la qualité des eaux littorales de la France métropolitaine pour l'élément de qualité Phytoplancton dans le cadre de la DCE. Etat des lieux des règles d’évaluation, et résultats pour la période 2007‐2012. Tome 2 ‐ Résultats détaillés : fiches par masse d’eau et éléments d’expertise ArchiMer
Belin, Catherine; Lamoureux, Alice; Soudant, Dominique.
Ce rapport en deux tomes détaille les résultats de l’évaluation, avec les règles de la DCE (Directive Cadre sur l’Eau), de l’élément de qualité phytoplancton dans les masses d’eau de la France métropolitaine. Cette évaluation est réalisée à partir des données acquises sur la période 2007-2012. Ce rapport contient également un état des lieux des grilles d’évaluation de l’indicateur phytoplancton qui sont applicables en 2014 pour les eaux littorales, et replace cette évaluation dans son contexte réglementaire, en rappelant les exigences de la DCE pour l’élément de qualité phytoplancton, et en donnant des informations sur l’avancement des travaux d’inter-calibration et l’état des décisions au niveau européen. Enfin il fait le point sur l’avancement des...
Tipo: Text Palavras-chave: DCE; Phytoplancton; Évaluation qualité; Masses d’eau; Métriques d’évaluation; Grilles d’évaluation; Valeurs de référence; WFD; Phytoplankton; Quality assessment; Water bodies; Evaluation metrics; Evaluation grids; Reference values.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00394/50492/51228.pdf
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The french approach to managing water resources in the mediterranean and the new European Water Framework Directive ArchiMer
Henocque, Yves; Andral, Bruno.
The main content of the new European Water Framework Directive is presented. Within its river basin management approach, a special mention of coastal waters status is made. Among the issues at stake are the setting up of river basin management plans, including coastal waters, and water quality assessment system leading to an harmonized definition of quality objectives and their appropriate indicators. The Rhone-Mediterranean-Corsica Water Master Plan, launched in 1996, is considered to be well fitted to this river basin approach and the necessary tools which go with it. It shows up how a river quality assessment system (SEQ) can be adapted to the coastal waters and how it can progressively lead to an efficient set of publishable environmental and...
Tipo: Text Palavras-chave: Indicators; Quality assessment; Coastal zone; River basin; Integrated management.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/2003/publication-429.pdf
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Visual assessment of pasture degradation: validation by ground cover and seasonal variation Rev. Ciênc. Agron.
Monteiro,Edevaldo de Castro; Burak,Diego Lang; Cunha,Alexson de Mello; Passos,Renato Ribeiro; Mendonça,Eduardo de Sá.
ABSTRACT Visual assessments of pasture degradation levels are widespread because they are rapid, practical and inexpensive. However, they can be subjective, making it difficult to distinguish between degradation levels to establish management practices. This fact, in association with the lack of standardization of the number of levels and the assessment periods, suggests a need for further studies. The objective of this study was to evaluate the relation between the degradation levels of visually evaluated pastures and the soil cover measured in fields in summer and winter. Percentages of Brachiaria grass, bare soil, spontaneous vegetation (broad and narrow leaf) and mulch were evaluated in 35 areas with different levels of visual degradation. Canonical...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brachiaria spp; Soil cover; Multivariate analysis; Quality assessment.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000100174
Registros recuperados: 6
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