164 research outputs found
Application of a potentiometric electronic tongue for assessing phenolic and volatile profiles of Arbequina extra virgin olive oils
The capability of determining the phenolic and volatile profiles of olive oils is of major relevance since these
compounds are known to greatly influence the gustatory and olfactory positive attributes of olive oils. An
electronic tongue with multiple linear regression models was used to evaluate both profiles based on olive oils
potentiometric data generated during a single assay. The proposed electronic tongue-chemometric procedure
enabled the quantification of flavonoids, phenolic acids and phenol alcohols of Arbequina extra-virgin olive oils
with a similar accuracy of UPLC-MS (0.93 ± 0.03≤R2≤0.98 ± 0.08 for the repeated K-fold cross-validation
procedure). Also, it was verified that the potentiometric device should not be applied to evaluate volatile
compounds in solution (0.80 ± 0.14≤R2≤0.94 ± 0.05 for the repeated K-fold cross-validation procedure),
showing a lower accuracy than HS-SPME-GS-MS. The overall satisfactory results showed that electronic tongue
could be used as a practical sensing instrument to generate a chemical profile of the compounds known to
influence the positive sensory attributes of olive oils.The authors would like to thank Consejo Regulador de
Denominación de Origen (DOP) Estepa and DOP Les Garrigues; Casas
Hualdo, Castillo Canena, Cortijo de Jara, Quaryat Dilar, EPAMIG and
Olivas do Sul for the donation of samples. We would like to dedicate
this work to the memory of Carmen Cabrera-Vique. We are grateful to
the CAPES Foundation, (Ministry of Education, Brazil), for scholarship
support provided to Thays Helena Borges (grant number 6073/13-1),
being presently a Ph.D. student from the Official Doctoral Program
‘‘Nutrition and Food Sciences” of the Granada University. This work
was also financially supported by Project POCI-01–0145-FEDER-
006984–Associate Laboratory LSRE-LCM, strategic project PEst-OE/
AGR/UI0690/2014 –CIMO all funded by FEDER - Fundo Europeu de
Desenvolvimento Regional through COMPETE2020-Programa
Operacional Competitividade e Internacionalização (POCI) – and by
national funds through FCT - Fundação para a Ciência e a Tecnologia,
Portugal.info:eu-repo/semantics/publishedVersio
COMPILATION OF ACTIVE FAULT DATA IN PORTUGAL FOR USE IN SEISMIC HAZARD ANALYSIS
To estimate where future earthquakes are likely to occur, it is essential to combine information about past earthquakes with knowledge about the location and seismogenic properties of active faults. For this reason, robust probabilistic seismic hazard analysis (PSHA) integrates seismicity and active fault data. Existing seismic hazard assessments for Portugal rely exclusively on seismicity data and do not incorporate data on active faults. Project SHARE (Seismic Hazard Harmonization in Europe) is an EC-funded initiative (FP7) that aims to evaluate European seismic hazards using an integrated, standardized approach. In the context of SHARE, we are developing a fully-parameterized active fault database for Portugal that incorporates existing compilations, updated according to the most recent publications. The seismogenic source model derived for SHARE will be the first model for Portugal to include fault data and follow an internationally standardized approach. This model can be used to improve both seismic hazard and risk analyses and will be combined with the Spanish database for use in Iberian- and European-scale assessments
The legal reserve: historical basis for the understanding and analysis of this instrument
Osseointegração clínica-radiológica do compósito hidroxiapatita-lignina entre implante metálico e tecido ósseo em coelho
Osteointegração da hidroxiapatita sintética no processo alveolar da mandíbula de cães: aspectos histológicos
Isolation, expansion and differentiation of mesenchymal stromal cells from rabbits' bone marrow
- …