[en] The aim of this investigation was to study the effects of sun-drying on some physicochemical
parameters, phenolic profiles, and antioxidant activities of three dark fig varieties. Sun-drying led to a decrease of weight and moisture content, an increase of sugar content, but not affect acidity. HPLC analysis revealed the presence of 22 phenolic compounds (14 phenolic acids and 8 flavonoids), including eight compounds that were detected for the first time. Phenolic acid contents decreased after sun-drying by about 29%, except cinnamic and gallic acids that were increased. Fresh dark fig contained high levels of flavonoids, particularly cyanidin 3-rutinoside and quercetin 3-rutinoside; sun-drying caused decrease in flavonoid contents by about 86%. There are a lot of antioxidant bioactive components besides the phenolic compounds as studied in this work; therefore, the reduction of phenolic compound content by sun-drying could mainly contribute to the reduction of antioxidant activity of the dark figs.
Al-Askari, G., Kahouadji, A., Khedid, K., Charof, R., & Mennane, Z. (2012). Caractérisations physico-chimique et microbiologique de la figue sèche prélevée des marchés de Rabat-Salé, Temara et Casablanca. Les Technologies De Laboratoire, 7, 12–19.
Bachir Bey, M. & Louaileche, H. (2015). A comparative study of phytochemical profile and in vitro antioxidant activities of dark and light dried fig (Ficus carica L.) varieties. The Journal of Phytopharmacology, 4, 41–48.
Bachir Bey, M., Louaileche, H., & Zemouri, S. (2013). Optimization of phenolic compound recovery and antioxidant activity of light and dark dried fig (Ficus carica L.) varieties. Food Science and Technology, 22, 1613–1619.
Çalişkan, O. & Polat, A. A. (2008). Fruit characteristics of fig cultivars and genotypes grown in Turkey. Scientia Horticulturae, 115, 360–367.
Çalişkan, O. & Polat, A. A. (2011). Phytochemical and antioxidant properties of selected fig (Ficus carica L.) accessions from the eastern Mediterranean region of Turkey. Scientia Horticulturae, 128, 473–478.
Dapkevicius, A., Venskutonis, R., Van Beek, T. A., & Linssen, J. P. (1998). Antioxidant activity of extracts obtained by different isolation procedures from some aromatic herbs grown in Lithuania. Journal of the Science of Food and Agriculture, 77, 140–146.
Dorman, H. J. D., Peltoketo, A., Hiltunen, R., & Tikkanen, M. J. (2003).Characterization of the antioxidant properties of deodourised aqueous extracts from selected Lamiaceae herbs. Food Chemistry, 83, 255–262.
Dubois, M., Gilles, K. A., Hamilton, J. K., Rebers, P. A., & Smith, F. (1956).Colorimetric method for determination of sugars and related substances. Analytical Chemistry, 28, 350–356.
FAO. (2016). Food and Agriculture Organization. Retrieved from http://faostat3.fao.org/browse/Q/QC/E
Favier, J. C., Ireland-Ripert, J., Laussucq, C., & Feinberg, M. (1993). Répertoire général des aliments. Tome 3: table de composition des fruits exotiques, fruits de cueillette d'Afrique (pp. 31–34). Paris, ORSTOM, Tech & Doc, INRA.
Fellows, P. (2000). Dehydration. Food processing technology, principles & practice (pp. 331–339). New York: CRC Press.
Ferreira, D., Guyot, S., Marnet, N., Delgadillo, I., Renard, C., & Coimbra, M. A. (2002). Composition of phenolic compounds in a Portuguese pear (Pyrus communis L. var. S. Bartolomeu) and changes after sundrying. Journal of Agricultural and Food Chemistry, 50, 4537–4544.
Gauillard, F. & Richard-Forget, F. (1997). Polyphenoloxidases from Williams pear (Pyrus communis L, cv Williams): Activation, purification and some properties. Journal of the Science of Food and Agriculture, 74, 49–56.
Hoffmann-Ribani, R., Huber, L. S., & Rodriguez-Amaya, D. B. (2008). Flavonols in fresh and processed Brazilian fruits. Journal of Food Composition and Analysis, 22, 263–268.
ISO 750. (1998). Determination of titratable acidity: fruit and vegetable products (2nd ed., pp. 1–4). International Standard Organisation, Geneva, Switzerland.
Karadeniz, F., Durst, R. W., & Wrolstad, R. E. (2000). Polyphenolic composition of raisins. Journal of Agricultural and Food Chemistry, 48, 5343–5350.
Martínez-García, J. J., Gallegos-Infante, J. A., Rocha-Guzmán, N. E., Ramírez-Baca, P., Candelas-Cadillo, M. G., & González-Laredo, R. F. (2013). Drying parameters of half-cut and ground figs (Ficus carica L.) var. Mission and the effect on their functional properties. Journal of Engineering, 2013, 1–8.
Naczk, M. & Shahidi, F. (2004). Extraction and analysis of phenolics in food. Journal of Chromatography A, 1054, 95–111.
Nichols, P. F. (1934).Public health aspects of dried foods. American Journal of Public Health, 24, 1129–1134.
Oliveira, A. P., Valentão, P., Pereira, J. A., Silva, B. M., Tavares, F., & Andrade, P. B. (2009). Ficus carica L.: Metabolic and biological screening. Food and Chemical Toxicology, 47, 2841–2846.
Oliveira, S. M., Ramos, I. N., Brandão, T. R. S., & Silva, C. L. M. (2015). Effect of Air-Drying Temperature on the Quality and Bioactive Characteristics of Dried Galega Kale (Brassica oleracea L. var. Acephala). Journal of Food Processing and Preservation, 39, 2485–2496.
Othman, A., Ismail, A., Abdul Ghani, N., & Adenan, I. (2007). Antioxidant capacity and phenolic content of cocoa beans. Food Chemistry, 100, 1523–1530.
Pourghayoumi, M., Bakhshi, D., Rahemi, M., & Jafari, M. (2012). Effect of pollen source on quantitative and qualitative characteristics of dried figs (Ficus carica L.) cvs ‘Payves’ and ‘Sabz’ in Kazerun - Iran. Scientia Horticulturae, 147, 98–104.
Re, R., Pellegrini, N., Proteggente, A., Pannala, A., Yang, M., & Rice-Evans, C. (1999). Antioxidant activity applying an improved ABTS radical cation decolorization assay. Free Radical Biology and Medicine, 26, 1231–1237.
Şimşek, M. & Yildirim, H. (2010). Fruit characteristics of the selected fig genotypes. African Journal of Biotechnology, 9, 6056–6060.
Solomon, A., Golubowicz, S., Yablowicz, Z., Grossman, S., Bergman, M., Gottlieb, H., … Flaishman, M. A. (2006). Antioxidant activities and anthocyanin content of fresh fruits of common fig (Ficus carica L.). Journal of Agricultural and Food Chemistry, 54, 7717–7723.
Stohs, S. & Bagchi, D. (1995). Oxidative mechanisms in the toxicity of metal ions. Free Radical Biology and Medicine, 18, 321–336.
Sun, Y., Shen, Y., Liu, D., & Ye, X. (2015). Effects of drying methods on phytochemical compounds and antioxidant activity of physiologically dropped un-matured citrus fruits. LWT–Food Science and Technology, 60, 1269–1275.
Toor, R. K. & Savage, G. P. (2006). Effect of semi-drying on the antioxidant components of tomatoes. Food Chemistry, 94, 90–97.
Treutter, D. (2006). Significance of flavonoids in plant resistance: A review. Environmental Chemistry Letter, 4, 147–157.
Tunde-Akintunde, T. Y. (2010). Effect of pretreatment on drying time and quality of chilli pepper. Journal of Food Processing and Preservation, 34, 595–608.
UNECE. (2004). United Nations Economic Commission for Europe (UNECE) - Standard, DDP-14, concerning the marketing and commercial quality control of Dried Figs. United Nations Edition. New York and Geneva.
Vallejo, F., Marín, J. G., & Tomás-Barberán, F. A. (2012). Phenolic compound content of fresh and dried figs (Ficus carica L.). Food Chemistry, 130, 485–492.
Yildirim, A., Oktay, M., & Bilaloglu, V. (2001). The antioxidant activity of the leaves of Cydonia vulgaris. Turkish Journal of Medical Science, 31, 23–27.