scholarly journals Tocopherols: Chemical Structure, Bioactivity, and Variability in Croatian Virgin Olive Oils

10.5772/64658 ◽  
2016 ◽  
Author(s):  
Maja Jukić Špika ◽  
Klara Kraljić ◽  
Dubravka Škevin
Keyword(s):  
Chemical Structure ◽  
Virgin Olive Oils ◽  
Olive Oils

A preliminary study on the potential of front face fluorescence spectroscopy for the discrimination of Moroccan virgin olive oils and the prediction of their quality

2021 ◽  
Author(s):  
Hicham Zaroual ◽  
El Mestafa El Hadrami ◽  
Romdhane Karoui
Keyword(s):  
Fluorescence Spectroscopy ◽  
Olive Oil ◽  
Virgin Olive Oil ◽  
Front Face ◽  
Virgin Olive Oils ◽  
Olive Oils ◽  
Preliminary Study

This study examines the feasibility of using front face fluorescence spectroscopy (FFFS) to authenticate 41 virgin olive oil (VOO) samples collected from 5 regions in Morocco during 2 consecutive crop seasons.

Shelf-life of Extra Virgin Olive Oils from Southern Italy

2014 ◽  
Vol 10 (3) ◽  
pp. 234-240 ◽  
Author(s):  
Costantina Barbarisi ◽  
Michele Stasio ◽  
Francesco Cara ◽  
Melissa Nazzaro ◽  
Francesco Siano ◽  
...  
Keyword(s):  
Shelf Life ◽  
Southern Italy ◽  
Virgin Olive Oils ◽  
Olive Oils

Quality evolution of extra-virgin olive oils according to their chemical composition during 22 months of storage under dark conditions

2020 ◽  
Vol 311 ◽  
pp. 126044 ◽  
Author(s):  
Sonia Esposto ◽  
Roberto Selvaggini ◽  
Agnese Taticchi ◽  
Gianluca Veneziani ◽  
Beatrice Sordini ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Virgin Olive Oils ◽  
Olive Oils ◽  
Dark Conditions

scholarly journals Prediction of Fruity Aroma Intensity and Defect Presence in Virgin Olive Oil Using an Electronic Nose

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2298
Author(s):  
Pablo Cano Marchal ◽  
Chiara Sanmartin ◽  
Silvia Satorres Martínez ◽  
Juan Gómez Ortega ◽  
Fabio Mencarelli ◽  
...  
Keyword(s):  
Olive Oil ◽  
Low Cost ◽  
Virgin Olive Oil ◽  
General Purpose ◽  
Quality Parameter ◽  
Lasso Regression ◽  
Virgin Olive Oils ◽  
Electronic Noses ◽  
Olive Oils ◽  
Instrumental Technique

The organoleptic profile of a Virgin Olive Oil is a key quality parameter that is currently obtained by human sensory panels. The development of an instrumental technique capable of providing information about this profile quickly and online is of great interest. This work employed a general purpose e-nose, in lab conditions, to predict the level of fruity aroma and the presence of defects in Virgin Olive Oils. The raw data provided by the e-nose were used to extract a set of features that fed a regressor to predict the level of fruity aroma and a classifier to detect the presence of defects. The results obtained were a mean validation error of 0.5 units for the prediction of fruity aroma using lasso regression; and 88% accuracy for the defect detection using logistic regression. Finally, the identification of two out of ten specific sensors of the e-nose that can provide successful results paves the way to the design of low-cost specific electronic noses for this application.

Influence of malaxation temperature and time on the quality of virgin olive oils

2001 ◽  
Vol 72 (1) ◽  
pp. 19-28 ◽  
Author(s):  
Franca Angerosa ◽  
Roberta Mostallino ◽  
Carla Basti ◽  
Raffaella Vito
Keyword(s):  
Virgin Olive Oils ◽  
Olive Oils

scholarly journals Effects of the Filtration on the Biotic Fraction of Extra Virgin Olive Oil

Foods ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1677
Author(s):  
Biagi Angelo Zullo ◽  
Giulia Venditti ◽  
Gino Ciafardini
Keyword(s):  
Olive Oil ◽  
Virgin Olive Oil ◽  
Extra Virgin Olive Oil ◽  
Filter Press ◽  
Filtration Process ◽  
Virgin Olive Oils ◽  
Olive Oils ◽  
Filtration System ◽  
Cellulose Filter ◽  
Initial Contamination

Filtration is a widely used process in the production of extra virgin olive oil. We studied the influence of filtration performed with cotton filters and cellulose filter press on the biotic components of the oily mass containing probiotic traits in two freshly produced monocultivar extra virgin olive oils. The concentration of bacteria was reduced from 100% to 28%, while that of fungi was reduced from 100% to 44% after filtration, according to the filtration system and the initial contamination of the original monocultivar extra virgin olive oil. Compared with the control, the yeast content in the oil samples filtered with cotton filters was reduced from 37% to 11% depending on the cultivar. In the oil filtered with cellulose filter press, the yeast content reduced from 42% to 16%. The viable yeast that passed through the oily mass during the filtration process with cellulose filter press, unlike all the other samples, were unable to survive in the oil after a month of storage. The possible health benefits of compounds from both the biotic and abiotic fraction of the oil, compared to the control, were significantly low when filtered with the cellulose filter press.

Microwave Heating Effects on the Chemical Composition and the Antioxidant Capacity of Tataouine Virgin Olive Oils from Tunisia

2010 ◽  
Vol 73 (10) ◽  
pp. 1891-1901 ◽  
Author(s):  
IMEN OUESLATI ◽  
WAEL TAAMALLI ◽  
FAOUZIA M. HADDADA ◽  
MOKHTAR ZARROUK
Keyword(s):  
Oxidative Stability ◽  
Microwave Heating ◽  
Genetic Factor ◽  
Degradation Rate ◽  
Treatment Time ◽  
Antioxidant Potential ◽  
Virgin Olive Oils ◽  
Olive Oils ◽  
Heating Effects ◽  
Total Fraction

Four Tunisian virgin olive oils (VOOs), derived from varieties (Chemlali Tataouine, Zarrazi Douirat, Fakhari Douirat, and Dhokar Douirat) grown in the harsh pedoclimatic conditions of the region of Tataouine, were evaluated for their responses to microwave heating. Aside from fatty acid composition, all other evaluated parameters were affected by microwave heating, and their variations depend on the genetic factor. Chemlali Tataouine VOO exhibited the slowest biophenol degradation rate and the least diminution in oxidative stability and consequently, its total fraction and both lipidic and methanolic fractions remained unchanged with an exceptional antioxidant potential. In the remaining studied VOOs, the biophenol contents, the oxidative stability, and the antioxidant potential underwent gradual decreases; nevertheless, their levels at the longer treatment time are close to some fresh VOOs. These results should be taken into consideration when Tataouine VOOs are recommended for microwave heating.

scholarly journals Chromatographic Fingerprinting Enables Effective Discrimination and Identitation of High-Quality Italian Extra-Virgin Olive Oils

2021 ◽  
Author(s):  
Federico Stilo ◽  
Ana M. Jiménez-Carvelo ◽  
Erica Liberto ◽  
Carlo Bicchi ◽  
Stephen E. Reichenbach ◽  
...  
Keyword(s):  
High Quality ◽  
Virgin Olive Oils ◽  
Olive Oils ◽  
Chromatographic Fingerprinting
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