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Changes in Olive and Olive Oil Characteristics During Maturation

  • Original Paper
  • Published:
Journal of the American Oil Chemists' Society

Abstract

Changes in olive properties and oil quality, oxidative stability, phenolic and chemical composition of two common Turkish varieties (Memecik and Edremit) during maturation were investigated. Olive samples were collected in their own growing region for five different harvest dates and processed to oil with a laboratory scale mill. Metabolic behaviors of these two varieties along with the maturation were different in terms of some compositional parameters. Oleic acid, triolein, β-sitosterol, oleuropein, hydroxytyrosol, and tyrosol contents of olive or olive oils fluctuated with maturation. However, changes in average weight, flesh/pit ratio, water and oil contents of the olives were observed. Phenolics such as trans cinnamic acid contents of both olive fruits decreased whereas cyanidin 3-O-glucoside and cyanidin 3-O-rutinoside anthocyanins increased. Free fatty acids of virgin olive oils were found independent of maturity although some slight changes were determined in peroxide value, dien and trien conjugations. Some compositional parameters such as pigment concentration, tocopherols, stearic acid, linolenic acid, palmitodiolein and monounsaturated/polyunsaturated fatty acid ratio decreased while linoleic acid, dioleolinolein, palmitooleolinolein and Δ-5-avenasterol percentages increased with the maturation. A clear discrimination was observed with principal component analysis. The data obtained can also be considered useful for providing information to determine the ideal maturity stage.

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Acknowledgments

The authors thank Hakkı Usta Centrifuge Technologies for their technical contribution.

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Authors and Affiliations

  1. Faculty of Engineering, Food Engineering Department, Adnan Menderes University, 09100, Aydın, Turkey

    Aslı Yorulmaz

  2. Food Engineering Department, Faculty of Engineering, Nigde University, 51240, Nigde, Turkey

    Hakan Erinc

  3. Food Engineering Department, Faculty of Engineering, Ankara University, 06110, Ankara, Turkey

    Aziz Tekin

Authors
  1. Aslı Yorulmaz
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  2. Hakan Erinc
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  3. Aziz Tekin
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Correspondence to Aziz Tekin.

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Yorulmaz, A., Erinc, H. & Tekin, A. Changes in Olive and Olive Oil Characteristics During Maturation. J Am Oil Chem Soc 90, 647–658 (2013). https://doi.org/10.1007/s11746-013-2210-7

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  • DOI: https://doi.org/10.1007/s11746-013-2210-7

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