Search results for "olive."
showing 10 items of 459 documents
Modelling the effect of ascorbic acid, sodium metabisulphite and sodium chloride on the kinetic responses of lactic acid bacteria and yeasts in table…
2010
he goal of this work was to apply the Quasi-chemical primary model (a system of four ordinary differential equations that derives from a hypothetical four-step chemical mechanism involving an antagonistic metabolite) in the study of the evolution of yeast and lactic acid bacteria populations during the storage of Manzanilla–Aloreña table olives subjected to different mixtures of ascorbic acid, sodium metabisulphite and NaCl. Firstly, the Quasi-chemical model was applied to microbial count data to estimate the growth–decay biological parameters. The model accurately described the evolution of both populations during storage, providing detailed information on the microbial behaviour. Secondly…
Study of chemical changes produced in virgin olive oils with different phenolic contents during an accelerated storage treatment.
2009
Chemical changes produced in an extra virgin olive oil sample in the presence (EVOO) and absence (EVOOP) of its phenolic fraction during an accelerated storage treatment at 60 degrees C up to 7 weeks were studied. Modifications in phenol content, as well as changes in several quality parameters (free acidity, peroxide value, UV absorbance, fatty acid composition, oxidative stability index, and tocopherol content) were also evaluated under the same storage conditions and compared to those of the same sample deprived of phenolic compounds. When the phenolic extract of the EVOO was studied, a decrease of the antioxidants first present in the sample and an increase of the oxidized products were…
Approche géoarchéologique sur la nécropole monumentale d'Escolives-Sainte-Camille (Yonne) : un site en bordure de chenal de l'Yonne à l'époque néolit…
2001
International audience; L'émergence du Néolithique moyen I Cerny s'accompagne dans le sud-est du Bassin parisien de l'apparition de nécropoles monumentales implantées dans les fonds de vallée fluviales. L'insertion de ces lieux funéraires dans le paysage révèle une volonté ostentatoire marquée et traduit peut-être une forme d'affirmation du groupe sur son territoire. Dans ce cadre, la fouille engagée sur la nécropole d'Escolives-Sainte-Camille "La Pièce de l'Étang" a fait l'objet de travaux spécifiques visant à caractériser l'environnement du site. ll s'agissait de restituer l'insertion de ce site bordé de deux paléochenaux dans le milieu hydrographique et d'éclairer la compréhension des co…
Flavouring Extra-Virgin Olive Oil with Aromatic and Medicinal Plants Essential Oils Stabilizes Oleic Acid Composition during Photo-Oxidative Stress
2021
Essential oils (EOs) from medicinal and aromatic plants (MAPs) are well-known as natural antioxidants. Their addition to extra-virgin olive oil (EVOO) can contribute to reducing fat oxidation. The main aim of this study was to improve both food shelf-life and aromatic flavour of EVOO, adding different EOs of Sicilian accessions of common sage, oregano, rosemary and thyme. The morphological and production characteristics of 40 accessions of MAPs were preliminarily assessed. EOs from the most promising accessions of MAPs were analysed by gas-chromatography and mass spectrometry. Photo-oxidative studies of the EOs were carried out and the determination of the EVOO fatty acids obtained from 4 I…
Development of a Real-Time Loop-Mediated Isothermal Amplification Assay for the Rapid Detection of Olea Europaea Geminivirus
2022
A real-time loop-mediated isothermal amplification (LAMP) assay was developed for simple, rapid and efficient detection of the Olea europaea geminivirus (OEGV), a virus recently reported in different olive cultivation areas worldwide. A preliminary screening by end-point PCR for OEGV detection was conducted to ascertain the presence of OEGV in Sicily. A set of six real-time LAMP primers, targeting a 209-nucleotide sequence elapsing the region encoding the coat protein (AV1) gene of OEGV, was designed for specific OEGV detection. The specificity, sensitivity, and accuracy of the diagnostic assay were determined. The LAMP assay showed no cross-reactivity with other geminiviruses and was allow…
Precision Oliviculture: Research Topics, Challenges, and Opportunities—A Review
2022
Since the beginning of the 21st century, there has been an increase in the agricultural area devoted to olive growing and in the consumption of extra virgin olive oil (EVOO). The continuous change in cultivation techniques implemented poses new challenges to ensure environmental and economic sustainability. In this context, precision oliviculture (PO) is having an increasing scientific interest and impact on the sector. Its implementation depends on various technological developments: sensors for local and remote crop monitoring, global navigation satellite system (GNSS), equipment and machinery to perform site-specific management through variable rate application (VRA), implementation of g…
Local old olive landrace varieties in Israel—Valuable plant genetic resources in olive cultivation
2008
It is assumed that the cultivation of olive trees started in the East Mediterranean in the third millennia BCE. Throughout history and until recently, successful olive clones were maintained vegetatively and were grafted either on seedlings or on spheroblasts removed from the base of the trunk. It therefore can be hypothesized that local old olive trees, older than 500 years might represent an ancient gene pool. Modern terminology categorizes local genotypes into four main variety groups. However, in traditional terminology these were further differentiated into 27 cultivars according to their phenotypic traits. This genetic diversity, along with the fact that olive trees have been cultivat…
Genetic similarity among Tunisian cultivated olive estimated through SSR markers
2013
Olive (Olea europaea L. subsp. europaea var. europaea) is one of the oldest fruit tree in the Mediterranean basin, and is cultivated for oil and canned fruit. Part of this interest is driven by the economic importance of olive oil which is increasing throughout the world due to its beneficial effect to human health. In Tunisia, olive has great socio-economic importance, with more than 60 millions olive trees cultivated for olive oil production including a wide range of cultivars which are widely extended from the north to the south regions of the country for its high economic value. Here, we applied microsatellites (SSRs) molecular markers to assess the genetic variability of the most impor…
Genetic diversity and clonal variation within the main Sicilian olive cultivars based on morphological traits and microsatellite markers
2014
The richness of Olea europaea (L.) genetic resources in Sicily is well documented. In the last 30 years, mostof the local cultivars, landraces and ecotypes have been gathered together in a large ex-situ collection,containing more than 300 genotypes. In this study, 45 putative clones of the main Sicilian olive cultivarswere characterized morphologically using microsatellite markers to unambiguously identify possiblesuperior genotypes. The microsatellites employed were polymorphic (observed heterozygosity = 0.71;polymorphic information content = 0.59), discriminated 52% of the genotypes and enabled the detectionof intra-cultivar polymorphism, derived from both somatic mutations, indicating th…
Approche géoarchéologique sur la nécropole monumentale d'Escolives-Ste-Camille (Yonne): un site en bordure d'un chenal de l'Yonne à l'époque néolithi…
2006
Die Herausbildung des Mittelneolithikums I Cerny wird im Südosten des Pariser Beckens von dem Auftauchen monumentaler Nekropolen in den Sohlen von Flusstälern begleitet. Die Eingliederung dieser Bestattungsplätze in die Landschaft lässt eine ausdrückliche Absicht erkennen und tradiert möglicherweise den Anspruch einer Gruppe, ihr Gebiet deutlich als das ihre auszuweisen. Vor diesem Hintergrund waren die Ausgrabungen der Nekrolpole von Escolives-Sainte-Camille ‘La Pièce de l'Étang’ von Untersuchungen begleitet, welche die Umgebung des Fundplatzes in neolithischer Zeit bestimmen sollten. Es ging darum, die Einfügung des Platzes zwischen zwei Paläorinnen in ihrem hydrographischen Milieu zu rek…