Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Italian and Tunisian researchers relate olive oil quality with fruit ripening

16.12.2008
The study tested the ideal ripening stage to extract an olive oil with proper chemical profiles and the best oxidation levels.

The chemical composition and quality of virgin olive oil may be influenced by genotype and different agronomic and technological factors.

Extra virgin olive oil is considered to be the best olive oil for its organoleptic characteristics (its capacity to preserved its original properties, such as smell, taste, colour and texture), for its oxidative stability and its chemical composition. It is practically the only vegetable oil that can be consumed directly in its raw state and contains important nutritional elements (vitamins, antioxidants, etc.).

The results from the italotunisian study reveal that the chemical composition and quality of virgin olive oil may be influenced by genotype and different agronomic and technological factors. The study was carried out by members of the Laboratoire Caractérisation et Qualité de l’Huile d’Olive, Centre de Biotechnologie de Borj-Ce´dria, Tunisia, and the Dipartimento di Scienze degli Alimenti, Università di Bologna, Italy; the paper was published in 2008 in the journal Food Chemistry.

A matter of genes... and maturity

The oxidative stability, sensory quality and health properties of virgin olive oil stem from a prominent and well-balanced chemical composition. In fact, the high content of oleic acid in olive oil serves to slow down penetration of fatty acids into arterial walls.

The chemical composition of virgin olive oil may be influenced by genotype and different agronomic (i.e. fruit ripeness degree, water supply) and technological factors. This research reports the evaluation of the influence of the olive ripening stage on the quality indices, the major and the minor components and the oxidative stability of the two main monovarietal Tunisian cultivars (cvv. Chétoui and Chemlali) virgin olive oils. The oils sampled at five different ripeness stages were submitted to different analysis.

Moreover, the triacylglycerol and fatty acid compositions, and minor components, pigments and their relation with the oil oxidative stability were evaluated. The tested oils showed very good correlation between the oxidative stability and their composition.

The chemical data discussed in this work can be considered useful in providing information about the presence in the oil of major and minor compounds depending on olive ripening. The analytical parameters studied remained widely within estimated limits of the regulation throughout the maturity process. Nevertheless, this research evidenced that the oleic/linoleic acid ratio shows a decreasing trend as the olives ripened.

With regard to phenolic compounds, Chétoui had the highest stability value. Finally, the present work shows in Chétoui, the anticipate harvest-date, gave the best results in terms of all the parameters considered. Instead, for the cv. All that data could be used to define the ideal ripening degree to confer a good balance between chemical profiles.

Antonio Marín Ruiz | alfa
Further information:
http://www.oleociencia.es
http://www.oleociencia.com

More articles from Studies and Analyses:

nachricht WAKE-UP provides new treatment option for stroke patients | International study led by UKE
17.05.2018 | Universitätsklinikum Hamburg-Eppendorf

nachricht First form of therapy for childhood dementia CLN2 developed
25.04.2018 | Universitätsklinikum Hamburg-Eppendorf

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Designer cells: artificial enzyme can activate a gene switch

22.05.2018 | Life Sciences

PR of MCC: Carbon removal from atmosphere unavoidable for 1.5 degree target

22.05.2018 | Earth Sciences

Achema 2018: New camera system monitors distillation and helps save energy

22.05.2018 | Trade Fair News

VideoLinks
Science & Research
Overview of more VideoLinks >>>