Search results for "olive."

Evaluation of the quality of olive oil using fatty acid profiles by direct infusion electrospray ionization mass spectrometry

2008

Abstract Electrospray ionization mass spectrometry is used to predict the olive oil quality according to European Union marketing standards. Samples were 1:50 diluted in an alkaline 85:15 (v/v) propanol/methanol mixture and directly infused into the electrospray ionization source of an ion trap mass spectrometer. The establishment of ratios of the peak abundances of the free fatty acids followed by linear discriminant analysis was employed to predict the olive oil quality grade. In addition, using multiple linear regression and partial least-squares regression, the percentages of extra virgin and virgin olive oils in binary mixtures were predicted with 5–11% average prediction errors.

Rapid evaluation of oxidised fatty acid concentration in virgin olive oil using Fourier-transform infrared spectroscopy and multiple linear regression

2011

Abstract Fourier-transform infrared spectroscopy (FTIR), followed by multivariate treatment of spectral data, was used to evaluate the oxidised fatty acid (OFA) concentration in virgin olive oil samples characterised by different oxidative status. The entire FTIR spectra (4000–700 cm−1) of oils were divided in 25 wavelength regions. The normalised absorbances of the peak areas within these regions were used as predictors. In order to predict the OFA concentration, multiple linear regression (MLR) models were performed. After a cube root transformation of data, an MLR model constructed using eight predictors was able to predict OFA concentration with an average error of 17%. The main wavelen…

Green extraction approach for the recovery of polyphenols from Croatian olive leaves (Olea europea)

2017

Abstract Pressurized liquid extraction (PLE) is shown as an innovative green technology for the effective extraction of the various phytochemicals from food by-products, therefore the aims of this study were to evaluate the application of PLE to engineer green extracts of Croatian olive leaves ( Olea europaea , cv. Oblica) for potential industrial production (functional foods/pharmaceuticals). PLE was conducted under various cycle numbers (1, 2), temperature (60, 80, 100 °C) and static times (5, 10, 15 min). Obtained extracts were characterized in terms of: (i) total polyphenols (TP); (ii) total flavonoids (TF); hydroxycinnamic acids (HCA); and (iv) flavonols (FLA). Response surface methodo…

Detection of crop water status in mature olive orchards using vegetation spectral measurements

2013

El desayuno escolar; una intervención educativa en alimentación y nutrición saludable

2017

El Desayuno Completo y Saludable es básico para el crecimiento además favorece un mayor rendimiento físico e intelectual durante la mañana. Dicho Desayuno debe ser siempre: Lácteos, Cereales, Frutas y sus derivados, sin olvidarnos de nuestro Aceite de Oliva. Saltarse o realizar un desayuno de mala calidad es un factor que, además, origina sobrepeso y obesidad infantil. Por ello las Organizaciones Promotoras de la Salud fomentan la intervención de hábitos saludables en Alimentación y Nutrición. Siendo uno de los objetivos este Desayuno Completo y Saludable el cual desde la escuela debe promocionarse, sobre todo fomentando la ingesta de fruta. En base a lo expuesto nuestro trabajo diseña una …

Cytotoxic effects of a crude extract of extra virgin olive oil on human HL60 cell lines sensitive and resistant with MDR phenotype

2008

Influence of pasteurization temperature on flesh firmness of table olives cv. Nocellara del Belice

2013

The application of heat treatment is especially important in maintaining the organoleptic characteristics of fermented agro-food products, which potential consumers perceive as reflecting the quality of these foodstuffs. The aim of this study was to evaluate the influence of pasteurization time and temperature on the flesh firmness of table olives cv. Nocellara del Belice, packaged in glass jars, and to study their effect on the microbial community of table olives. Four different treatments were applied, one for each of the pasteurization temperatures adopted: 65 °C, 75 °C, 85 °C and 95 °C. A control test was also carried out (test Tc, not pasteurized). Each test was repeated with treatment…

Eating patterns are associated with biomarkers in a selected population of university students and employees.

2011

AbstractThe association between diet and CVD cannot be assigned to a single nutrient, but rather to a set of nutrients and non-nutrients, and eating pattern analyses have become an important tool in investigation of this relationship. Our objective was to investigate eating patterns in relation to nutrient intake and serum concentration of folate, vitamin B12 and TAG in ninety-five healthy adult participants. Dietary information was collected by an FFQ, and eating patterns were obtained by principal components analyses of thirty-three food groups. Three eating patterns were extracted, a sweet eating pattern identified by intakes of cakes, snacks, sugar-sweetened drinks and chocolates; a pru…

Supramolecular organization of triglycerides in extra-virgin olive oils as assessed by high and low field NMR spectroscopies

2009

L’utilizzo della regressione multipla nelle indagini estimative condotte in mercati fondiari attivi: il caso studio di oliveti e vigneti in un territ…

2012

The present study aims to provide a further contribution to the knowledge about the mechanism of price formation concerning olive orchards and vineyards in a land market of south-west Sicily. Firstly the main characteristics of a sample concerning 42 land properties recently sold in Partanna territory were surveyed and afterwards their relationships between the most relevant among them and the correspondent market prices (both total and unitary sales prices) were investigated through the Multiple Regression Analysis. Finally some propositive remarks were formulated in order to create and successively keep up to date a database of land market prices, necessary tool to improve the quality lev…