Herein, we report a portable electrochemical biosensor based on butyrylcholinesterase (BChE) immobilized on carbon black (CB)-modified screen-printed electrodes (SPEs) for the detection of organophosphorous pesticides in olive oil. The BChE/CB-SPE biosensor was developed to detect paraoxon in standard solutions as well as in olive oil samples previously treated with the QuEChERS method to extra...

High-field 31P NMR (202.2 MHz) spectroscopy was applied to the analysis of 59 samples from three grades of olive oils, 34 extra virgin olive oils from various regions of Greece, and from different olive varieties, namely, 13 samples of refined olive oils and 12 samples of lampante olive oils. Classification of the three grades of olive oils was achieved by two multivariate statistical methods a...

The migration behaviour of low molecular weight compounds from food packaging materials is one of the key issues in assessing the possibility of use in such applications. The aim of this work was to study the migration of carvacrol (1% and 2% w/w) when added to high-density polyethylene. All materials were exposed to the food simulants olive oil and distilled water separately at 40 degrees C an...

The effect of repeated consumption of virgin olive oil on endogenous phenolic metabolites of fasting plasma is unknown. For this reason, we hypothesized that regular long-term virgin olive oil intake could have an indirect protection effect on the endogenous phenols. Thus, the aim of the study was to determine the phenolic profile of human plasma in a fasting state of long-term regular virgin o...

BACKGROUND Giardia lamblia is a common intestinal parasite that has been reported all over the world. OBJECTIVES This study was conducted to evaluate the effect of ozonized organic extra-virgin olive oil on the cyst of G. lamblia. METHODS The olive oil was ozonized based on international standards and confirmed by the world health organization (WHO) at various times in a generator. The ozon...

Introduction [1]. It is a rough ligno-cellulosic feed characterized by high percentage of crude fibre (CF), particularly rich in Olive (Olea europaea) production is distributed lignin, low crude protein (CP) [4] but having a over all the five continents. It is especially important in surprisingly high oil percentage [2]. Further, many the Mediterranean area, Spain being first as regards workers...

This paper describes a circular economy process based on environmentally and economically sustainable procedures which was applied to the sector of olive oil processing on an industrial scale. Olea europaea L. tissues and by-products represent a renewable and low-cost source of polyphenols, in particular hydroxytyrosol (HTyr), a naturally occurring compound well known for its biological propert...

Lycopene is the main carotenoid in tomatoes and it has been hypothesised to be responsible for reducing the risk of some cancers and heart disease. The cooking of tomatoes with olive oil is a characteristic combination in the Southern Mediterranean diet. Previous studies have shown that the absorption of lycopene is greater from processed tomatoes than fresh tomatoes, since the processing break...

The evolution of the main phenolic secoiridoid compounds throughout the different stages of the virgin olive oil making process-crushing, malaxation and liquid-solid separation-is studied here, with the goal of making possible the prediction of the partition and transformation that take place in the different steps of the process. The concentration of hydroxytyrosol secoiridoids produced under ...

The objectives of the present study were to evaluate and compare the antimicrobial activities of olive oil and vinegar against Salmonella and Escherichia coli. The spread plate method was used to determine the growth of Salmonella and Escherichia coli. The concentration of preservatives used for inhibition of Salmonella and Escherichia coli was determined by using minimum inhibitory concentrati...