[en] Three common non-commercial Tunisian date varieties were treated by two thermal systems, obtaining a liquid fraction which was characterized and its antioxidant capacity determined. The concentration of total phenols in the three varieties (Smeti, Garen Gazel, and Eguwa) was increased by steam explosion treatment up to 5311, 4680, and 3832 mg/kg of fresh dates, and their antioxidant activity up to 62.5, 46.5 and 43.1 mmol Trolox®/kg of fresh date, respectively. Both thermal treatments increased the content of phenolic acids. Additionally, a long scale study was carried out in a pilot plant, with steam treatment at 140 °C and 160 °C for 30 min. The liquid phase was extracted and fractionated chromatographically using adsorbent or ionic resins. The phenolic profiles were determined for each fraction, yielding fractions with interesting antioxidant activities with EC50 values of up to 0.08 mg/L or values of TEAC of 0.67 mmol Trolox®/g of extract.
Jiménez-Araujo, Ana; Campus Universitario Pablo de Olavide > Consejo Superior de Investigaciones Científicas (CSIC) > Instituto de la Grasa
Fernández-Bolaños, Juan; Campus Universitario Pablo de Olavide > Consejo Superior de Investigaciones Científicas (CSIC) > Instituto de la Grasa
Rubio-Senent, Fátima; Campus Universitario Pablo de Olavide > Consejo Superior de Investigaciones Científicas (CSIC) > Instituto de la Grasa
Lama-Muñoz, Antonio; Campus Universitario Pablo de Olavide > Consejo Superior de Investigaciones Científicas (CSIC) > Instituto de la Grasa
Sindic, Marianne ; Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Laboratoire Qualité et sécurité des produits agro-aliment.
Rodríguez-Gutiérrez, Guillermo; Campus Universitario Pablo de Olavide > Consejo Superior de Investigaciones Científicas (CSIC) > Instituto de la Grasa
Language :
English
Title :
Antioxidant phenolic extracts obtained from secondary Tunisian date varieties (Phoenix dactylifera L.) by hydrothermal treatments
M.H.M. Abed El-Azim, A.M.D. El-Mesalamy, F.A. Yassin, and S.A. Khalil Identification phenolic and biological activities of methanolic extract of date palm pollen (Phoenix dactylifera) Journal of Microbial & Biochemical Technology 7 2015 047 050
M. Al-Farsi, C. Alasalvar, A. Morris, M. Baron, and F. Shahidi Comparison of antioxidant activity, anthocyanins, carotenoids, and phenolics of three native fresh and sun-dried date (Phoenix dactylifera L.) varieties grown in Oman Journal of Agriculture and Food Chemistry 53 2005 7592 7599
A.A. Allaith, S.H. Ahmed, and F. Jafer Effect of different thermal treatments and freezing on the antioxidant constituents and activity of two Bahraini date cultivars (Phoenix dactylifera L.) International Journal of Food Science & Technology 47 2012 783 792
S.M. Al-Turki, A. Shahba, and C. Stushnoff Diversity of antioxidant properties and phenolic content of date palm (Phoenix dactylifera L.) fruits as affected by cultivar and location Journal of Food, Agriculture and Environment 8 2010 253 260
R.M.S. Ardekani, M. Khanavi, M. Hajimahmoodi, M. Jahangiri, and A. Hadjiakhoondi Comparison of antioxidant activity and total phenol contents of some date seed varieties from iran Iranian Journal of Pharmaceutical Research 9 2010 141 146
F. Biglari, A.F.M. Alkarkhi, and A.M. Easa Antioxidant activity and phenolic content of various date palm (Phoenix dactylifera) fruits from Iran Food Chemistry 107 2008 1636 1641
N. Blumenkrantz, and G. Asboe-Hansen New method for quantitative determination of uronic acids Analytical Biochemistry 54 1973 484 489
Z. Dische Color reactions of carbohydrates R.L. Whistler, M.L. Wolfram, Methods in carbohydrates chemistry 1962 Academic Press New York 477 512
D.A. El-Rayes Characterization of three date palm cultivars based on RAPD fingerprints and fruit chemical composition JKAU: Meteorology, Environment, and Arid Land Agriculture Sciences 20 2009 3 20
Fernández-Bolaños, J., Rodríguez, G., Lama, A., & Sánchez, P. (2011). Dispositivo y procedimiento para el tratamiento de los subproductos de la obtención de aceite de oliva. National patent number: P201031236.
J. Fernández-Bolaños, G. Rodríguez, R. Rodríguez, A. Heredia, R. Guillén, and A. Jiménez Total recovery of the waste of two-phase olive oil processing: Isolation of added-value compounds Journal of Agriculture and Food Chemistry 52 2004 507 514
B. Gonçalves, V. Falco, J. Moutinho-Pereira, E. Bacelar, F. Peixoto, and C. Correia Effects of elevated CO2 on grapevine (Vitis Vinifera L.): Volatile composition, phenolic content, and in vitro antioxidant activity of red wine Journal of Agriculture and Food Chemistry 57 2009 265 273
J. Harasym, and R. Oledzki Effect of fruit and vegetable antioxidants on total antioxidant capacity of blood plasma Nutrition 30 2014 511 517
Y.J. Hong, F.A. Tomas-Barberan, A.A. Kader, and A.E. Mitchel The flavonoid glycosides and procyanidin composition of Deglet Noor dates (Phoenix dactylifera) Journal of Agriculture and Food Chemistry 54 2006 2405 2411
M.P. Kahkonen, A.I. Hopia, H.J. Vuorela, J.P. Rauha, K. Pihlaja, T.S. Kujala, and M. Heinonen Antioxidant activity of plant extracts containing phenolic compounds Journal of Agriculture and Food Chemistry 47 1999 3954 3962
H. Li, X. Wang, P. Li, Y. Li, and H. Wang Comparative study of antioxidant activity of grape (Vitis vinifera) seed powder assessed by different methods Journal of Food and Drug Analysis 16 2008 67 73
A. Mrabet, R. Rodríguez-Arcos, R. Guillén-Bejarano, N. Chaira, A. Ferchichi, and A. Jiménez-Araujo Dietary fiber from Tunisian common date cultivars (Phoenix dactylifera L.): Chemical composition, functional properties, and antioxidant capacity Journal of Agricultural and Food Chemistry 60 2012 3658 3664
A. Mrabet, G. Rodríguez-Gutiérrez, R. Guillén-Bejerano, R. Rodríguez-Arcos, A. Ferchichi, M. Sindic, and A. Jiménez-Araujo Valorization of Tunisian secondary date varieties (Phoenix dactylifera L.) by hydrothermal treatments: New fibre concentrates with antioxidant properties LWT - Food Science and Technology 60 2015 518 524
J.M. Oliva, I. Ballesteros, M.J. Negro, P. Manzanares, A. Cabañas, and M. Ballesteros Effect of binary combinations of selected toxic compounds on growth and fermentation of Kluyveromyces marxianus Biotechnology Progress 20 2004 715 720
M.A. Olszewska In vitro antioxidant activity and total phenolic content of the inflorescences, leaves and fruits of Sorbus torminalis (L.) Crantz Acta Poloniae Pharmaceutica - Drug Research 68 2011 945 953
R. Rodríguez, S. Jaramillo, G. Rodríguez, J.A. Espejo, R. Guillén, and J. Fernández-Bolaños A. Jiménez Antioxidant activity of ethanolic extracts from several asparagus cultivars Journal of Agriculture and Food Chemistry 53 2005 5212 5217
F. Rubio-Senent, G. Rodríguez-Gutiérrez, A. Lama-Muñoz, and J. Fernández-Bolaños New phenolic compounds hydrothermally extracted from the olive oil by-product alperujo and their antioxidative activities Journal of Agriculture and Food Chemistry 60 2012 1175 1186
E.B. Saafi, A. El Arem, M. Hammami, and L. Achour Phenolic content and antioxidant activity of four date palm (Phoenix dactylifera L.) fruit varieties grown in Tunisia International Journal of Food Science & Technology 44 2009 2314 2319
E.A. Saleh, M.S. Tawfik, and H.M. Abu-Tarbouch Phenolic contents and antioxidant activity of various date palm (Phoenix dactylifera l.) fruits from Saudi Arabia Food and Nutritional Sciences 2 2011 1134-147
V. Singh, N. Guizani, M.M. Essa, F.L. Hakkim, and M.S. Rahman Comparative analysis of total phenolics, flavonoid content and antioxidant profile of different date varieties (Phoenix dactylifera L.) from Sultanate of Oman International Food Research Journal 19 2012 1063 1070
V.L. Singleton, and J.A. Rossi Jr. Colorimetry of total phenolics with phosphomolybdic-phosphotungstic acid reagents American Journal of Enology and Viticulture 16 1965 144 158
