The effect of aqueous extract of white tea on heat resistance of sesame oil prepared by cold pressing

Document Type : Full Research Paper

Authors

• Sedigheh Yazdanpanah ¹
• Sara Mohammadi ²
• Amir Hossein Elhami Rad ³

¹ 1. Department of Food Science and Technology, Kazeroun branch, Islamic Azad University, Kazeroun, Iran

² Department of Food Science and Technology, Kazeroun branch, Islamic Azad University, Kazeroun, Iran

³ Department of Food Science and Technology, Sabzevar branch, Islamic Azad University, Sabzevar, Iran

https://doi.org/10.22067/ifstrj.2021.70990.1063

Abstract

Introduction: White tea is a new ingredient in a wide range of phenolic, antioxidant and antimicrobial compounds. The most important catechins in white tea are epicatechin, epigallocatechin, epicatechin- 3- galate, and epigallocatechin- 3- galate, which are flavonol gallates. The concentration of these phenolic compounds in white tea is higher than green tea. Sesame seed oil, which is produced by cold pressing method, has a great ability to preserve antioxidant compounds. Significant oxidative stability of 
sesame oil is due to the presence of lignan non-soapy substances. Strong antioxidant compounds in sesame seed oil include sesamol, sesamulin (antioxidant precursor), sesaminol and its isomers. The aim of this study was to investigate the effect of natural antioxidants of sesame oil and white tea on inhibiting the effect of metals on oxidation of sesame oil.
 
Materials and Methods: In this study, aqueous extract of white tea was extracted and sesame oil was produced using cold press. In the next step, six samples including control sample (sesame oil), sesame oil containing white tea extract, sesame oil containing white tea extract and 0.1 ppm iron, Sesame oil containing white tea extract and 0.1 ppm copper, sesame oil with tea and 0.1 ppm zinc extract and sesame oil containing 100 ppm BHT were prepared. In all samples, aqueous extract of white tea in the amount of 6 mg/ 10 g was added to sesame oil. Total phenol, antioxidant capacity, power reducing on white tea extract and antioxidant power, peroxide number, oxidation stability and fatty acids profile were measured. All experiments were performed in a completely randomized design with three replications and the means were compared with Duncan’s test at the level of (P<0.05). SAS V 9.1 software was used for statistical analysis of quantitative data.  Results and Discussion: The results showed that the aqueous extract of white tea contained 4.06 (mg gallic acid per gram of sample) total phenol, 6.00 (μg/ ml) antioxidant capacity 0.020 (mg/ g). Ml) is a reducing power. The reducing power of BHT antioxidant was 40 times and the antioxidant power of BHT was 14.85 times more than the aqueous extract of white tea. In the inhibition of free radicals in sesame oil, the aqueous extract of white tea had a significantly greater effect than the control sample. The iron- containing sample had more oxidation than other samples. In the inhibition of free radicals in sesame oil, the aqueous extract of white tea had a significantly greater effect than the control sample. The iron- containing sample had more oxidation than other samples. Rancimat value for samples of control sesame oil, sesame oil with tea and iron extract, sesame oil with tea and copper extract, sesame oil with tea and zinc extract, sesame oil with tea extract and sesame oil with synthetic antuioxidant BHT respectively 8.79 4.80, 9.08, 9.35, 9.42 and 9.61 hours were measured. The highest stability was related to the sample of sesame oil and synthetic antioxidant BHT and the 
Results and Discussion: The results showed that the aqueous extract of white tea contained 4.06 (mg gallic acid per gram of sample) total phenol, 6.00 (μg/ ml) antioxidant capacity 0.020 (mg/ g). Ml) is a reducing power. The reducing power of BHT antioxidant was 40 times and the antioxidant power of BHT was 14.85 times more than the aqueous extract of white tea. In the inhibition of free radicals in sesame oil, the aqueous extract of white tea had a significantly greater effect than the control sample. The iron- containing sample had more oxidation than other samples. In the inhibition of free radicals in sesame oil, the aqueous extract of white tea had a significantly greater effect than the control sample. The iron- containing sample had more oxidation than other samples. Rancimat value for samples of control sesame oil, sesame oil with tea and iron extract, sesame oil with tea and copper extract, sesame oil with tea and zinc extract, sesame oil with tea extract and sesame oil with synthetic antuioxidant BHT respectively 8.79 4.80, 9.08, 9.35, 9.42 and 9.61 hours were measured. The highest stability was related to the sample of sesame oil and synthetic antioxidant BHT and the lowest stability was related to the sample of sesame oil with tea and iron extracts. In comparison with the effect of metals on the oxidation of sesame oil, the addition of iron to sesame oil has increased the oxidation rate compared to the two other examined metals (copper and zinc). Rare metals increase the oxidation rate of edible oils by increasing the production of free radicals from fatty acids or hydroperoxides. The composition of of fatty acids profile showed that palmitic acid, stearic acid, oleic acid, linoleic acid and linolenic acid were the predominant fatty acids in sesame oil. In the iron- containing sample, with increasing oxidation rate, the amount of linolenic acid decreased compared to other samples. The results of the Se index were confirmatory on the results of oxidative stability index. White tea extract and sesame oil due to their antioxidant and phenolic compounds have been able to inhibit free radicals and metal peroxidants, especially copper and zinc. Sesame oil extracted by cold pressing is not suitable for frying due to its low heat resistance, but it can be used in the formulation of salad dressings.

Keywords

• Antioxidant
• Metal catalyst
• Oxidative stability
• Sesame oil

References

1. Abdel-Razek, A. G., El-Shami, S. M., El-Mallah, M. H., Hassanien, M., Mahmoud, M. (2011). Blending of Virgin Olive Oil With Less Stable Edible Oils to Strengthen Their Antioxidative Potencies. Australian journal basic and applied sciences, 5(10): 312-318.
2. Abou-Gharbia, H. A., Shehata, A. A., Shahidi, F. (2000). Effect of processing on oidative stability and lipid classes of sesame oil. Food rsearch international, 33: 331-340. https://doi.org/10.1016/S0963-9969(00)00052-1
3. Akbari-Adergani, B., Ezeddin, M., Hashemi Mogaddam, H., Shoeibi, S. (2015). Effect of production process on concentration of lead and arsenic in sunflower oil. Journal of Mazandaran university of medical sciences, 25(127): 38-41.
4. Amini, B., Keramat, J., Hojateslami, M., Jahadi, M., Mahmodiyan, K. (2015). Evaluation of antioxidant effects of safflower in rapeseed oil and kilka fish oil. Food technology and nutrition, 12(3): 29-38.
5. AOCS. (2009). Official methods and recommended practices of the American oil chemists’ society (5th ed.). Champaign, Il, USA: AOCS Press.
6. Ayadi, M. A., Grati-Kanmoun, N., Attia, H. (2009). Physico-chemical changes and heat stability of extra virgin olive oils flavoured by selected Tunisian aromatic plants. Food and chemical toxicology, 47(10): 2613-2619. https://doi.org/10.1016/j.fct.2009.07.024
7. Benedet, J. A., Shibamoto, T. (2008). Role of transition metals, Fe(II), Cr(II), Pb(II), and Cd(II) in Lipid Peroxidation. Food chemistry, 107: 165-168. https://doi.org/10.1016/j.foodchem.2007.07.076
8. Bensmira, M., Jiang, B., Nsabimana, C., Jian, T. (2007). Effect of lavender and thyme incorporation in sunflower seed oil on its resistance to frying temperatures. Food research international, 40: 341-346. https://doi.org/10.1016/j.foodres.2006.10.004
9. Burits, M., Bucar, F. (2000). Antioxidant activity of Nigella sativa essential oil. Phytotheraphy research, 4: 323-328. https://doi.org/10.1002/1099-1573(200008)14:5<323::AID-PTR621>3.0.CO;2-Q
10. Cai, Y. Z., Sun, M., Xing, J., Luo, Q., Corke, H. (2006). Structure-radical scavenging activity relationships of phenolic compounds from traditional Chinese medicinal plants. Life Science, 78: 2872-2888. https://doi.org/10.1016/j.lfs.2005.11.004
11. Codex (2005). Codex Standard for Named Vegetable Oils: Codex Stan 210 (Amended 2005), pp. 13.
12. Dini Torkamani, M. R., Karaptyan, ZH. (2007). Investigation of important physical and chemical properties of grain in ten sesame cultivars. Journal of biology of Iran, 20(4): 327-333.
13. Farhoosh, R., Hoseini-Yazdi, S-Z. (2014). Evolution of oxidative values during kinetic studies on olive oil oxidation in the Rancimat test. Journalof the American oil chemists' society, 91(2): 281-293. https://doi.org/10.1007/s11746-013-2368-z
14. Farhoosh, R., Moosavi, S. M. R. (2007). Rancimat test for the assessment of used frying oils quality. Journal of food lipids, 14(3): 263-271. https://doi.org/10.1111/j.1745-4522.2007.00084.x
15. Farmani, J., Tirgarian, B., Razmpour, M. (2019). Evaluation of physicochemical properties of sesame oil from local extraction stores of Mazandaran province. Food science and technology, 15(84): 175-187. [In Persian].
16. Farzin, L., Moassesi, M. E. (2014). Determination of metal contents in edible vegetable oils produced in Iran using microwave-assisted acid digestion. Journal of applied chemical research, 8(3): 35-43.
17. Fazel, M., Sahari, M. A., Barzegar, M. (2009). Comparison of tea and sesame seed oils as two natural antioxidants in a fish oil model system by radical scavenging activity. International journal of food science and nutrition, 60: 567-576. https://doi.org/10.3109/09637480801987625
18. Ghasemi Pirbalouti A, Hossayni I., Shirmardi, H. A. (2013). Essential oil variation, antioxidant and antibacterial activity of mountainfennel [Zaravschanicamembranacea (Boiss.) M. Pimen]. Journal of Industrial Crops and Products, 50: 443-448. https://doi.org/10.1016/j.indcrop.2013.07.053
19. Golluce, M., Sahin, F., Sokmen, M., Ozer, H., Daferera, D., Sokmen, A., Polissiou, M., Adiguzel, A., Ozken, H. (2007). Antimicrobial and antioxidant properties of the essential oils and methanol exteract from Mentha longifoliassp. longifolia. Food Chemistry, 103: 1449 - 56. https://doi.org/10.1016/j.foodchem.2006.10.061
20. Gouveia, L., Zago, L., Moreira, A. (2017). Physical-chemical characterization and nutritional quality of sesame oil (Sesamum indicum). Journal of nutritional health and food science, 5(3): 1-7.
21. Hajiaghaalipour, F., Kanthimathi, M.S., Sanusi, J., Rajarajeswaran, J. (2014). Food chemistry, 169: 401-1.
22. Hraš, A. R., Hadolin, M., Knez, Z., Bauman, D. (2000). Comparison of antioxidative and synergistic effects of rosemary extract with α-tocopherol, ascorbyl palmitate and citric acid in sunflower oil. Food chemistry, 71: 229-233. https://doi.org/10.1016/S0308-8146(00)00161-8
23. Huang, D., Ou, B., Prior, R. L. (2005). The chemistry behind antioxidant capacity assays. Journal of agriculture food chemistry, 53(6): 1841-1856. https://doi.org/10.1021/jf030723c
24. INSO, 13392. (2015). Edible cold pressed oils– Specifications & Test methods. (Iranian National Standardization Organization. 1st. Revision, 2015).
25. Institute of standard and industrial research of Iran. 2004. Edible oils and fats- mixed liquid oils- test method. No. 5950. P: 1-9.
26. Iso 1978. Animal and vegetable fats and oils– preparation of methyl esters of fatty acids.
27. Kochhar, S. P. (2000). Stabilisation of frying oils with natural antioxidative components. European journalof lipid science and technology, 102(8‐9): 552-559. https://doi.org/10.1002/1438-9312(200009)102:8/9<552::AID-EJLT552>3.0.CO;2-V
28. Kumar, M., Gupta, V., Kumari, P., Reddy, C. R. K., Jha, B. (2011). Assessment of nutrient composition and antioxidant potential of Caulerpaceae seaweeds. Journal of food composition and analysis, 24(2): 270-278. https://doi.org/10.1016/j.jfca.2010.07.007
29. Mai, J., Chambers, L. J. (1990). Process for inhibiting liquid oxidation in food. US Patent No. 4891231.
30. Mathew, S., Abraham, T. A. (2006). In vitro antioxidant activity and scavenging effects of Cinnamomum verum leaf extract assayed by different methodologies. Foodand chemical toxicology, 44:198-206. https://doi.org/10.1016/j.fct.2005.06.013
31. Mimica-Dukić, N., Bozin, B., Soković, M., Mihajlović, B. Matavulj, M. (2003). Antimicrobial and antioxidant activities of three Mentha species essential oils. Planta medica, 69: 413-419. DOI: 10.1055/s-2003-39704
32. Mirzaei, A., Mohammadi, J., Mirzaei, N., Mirzaei, M. (2011). The Antioxidant capacities and total phenolic contents of some medicinal plants in Iran. Journal of Fasa University of medical sciences, 1(3): 160-167.
33. Molodi, F., Ghajar Bigi, p., Haj Hoseini Babaei, A., Mohamadpor Aasl, A. (2016). Evaluation of chemical and oxidative properties of imported extra virgin olive oils. Journal of food science and nutrition, 12(4): 27-34.
34. Mukhtar, H., Ahmad, N. (1999). Cancer chemo prevention future holds in multiple agents. Toxicologyand applied pharmacology, 158(3): 207-210. https://doi.org/10.1006/taap.1999.8721
35. Müller, H., Kirkhus, B., Pedersen, J. I. (2001). Serum cholesterol predictive equations with special emphasis on trans and saturated fatty acids. An analysis from designed controlled studies. Lipids, 36(8): 783-791. https://doi.org/10.1007/s11745-001-0785-6
36. Naseri, F. (1996). Oil Mashhad Publications, Astan Quds Razavi.
37. Nazari, Z., Gharachorlo, M., Elhamirad, A. H. (2017). Investigating the chelating effect of black tea. Food technology and nutrition, 14(4): 113-121.
38. Noël, T., Roger, P., Bernard, T., Djikeng, F. T., Azmeera, T., Karuna, M. S. L., Prasad, R. B. N., Womeni, H. M. (2017). Effects of boiling and roasting on proximate composition, lipid oxidation, fatty acid profile and mineral content of two sesame varieties commercialized and consumed in Far-North Region of Cameroon. Food chemistry, 15(221): 1308-1316. https://doi.org/10.1016/j.foodchem.2016.11.025
39. Ogbonna, P.E., Ukaan, S.I. (2013). Chemical composition and oil quality of seeds of sesame accessions grown in the Nsukka plains of South Eastern Nigeria. African journal of agricultural research. 8(9): 797–803.
40. Ortsater, H., Grankvist, N., Wolfram, S., Kuehn, N., Sjoholm, A. (2012). Diet supplementation with green tea extract Epigallocatechin gallate prevents progression to glucoseintolerance in Mice. Nutrition and metabolism, 9: 11-5. https://doi.org/10.1186/1743-7075-9-11
41. Rohadi , Lelita, D. I., Putri, A. S. (2019). Antioxidant Capacity of White Tea (Camelia Sinensis) Extract: Compared to Green, Oolong and Black Tea. International Conference on Food Science & Technology, IOP Conf. Series: Earth and Environmental Science 292 (2019) 012018, IOP Publishing, doi:10.1088/1755-1315/292/1/012018.
42. Safari, R., Elhami Rad, A. H., Atay Salehi, E. (2016). Evaluation of the antioxidant effect of oily sesame meal extract for stabilization Edible oils. Innovation in food science and technology, 8(3):33-44.
43. Shariatifar, N., Kamkar, A., Shams Ardekani, M. R., Misaghi, A., Jamshidi, A. H., Khaniki, Gh. R. (2012). Quantitative and qualitative study of phenolic compounds and antioxidant activity of plant Pulicaria Gnaphalodes. Ofegh -e- danesh journal of Gonabad University of medical sciences. 18(1): 35-41.
44. Sjovall, O., Virtalaine, T., Lapvetelainen, A., Kallio, H. (2000). Development of rancidity in wheat germ analyzed by headspace gas chromatography and sensory analysis. Journal of agricultural and food chemistry, 48(8): 3522-3527. https://doi.org/10.1021/jf981309t
45. Solimanian, SH., Sadeghi Mahonak, A. R., Alami, M., Ghorbani, M. (2015). Evaluation of total phenolic, flavonoid, anthocyanin compounds and antibacterial and antioxidant activity of Estonian of Valik fruit extract. Journal of Rafsanjan University of medical sciences, 13: 53-66.
46. Tynek, M., Pawłowicz, R., Gromadzka, J., Tylingo, R., Wardencki, W., Karlovits, G. (2012). Virgin rapeseed oils obtained from different rape varieties by cold pressed method–their characteristics, properties, and differences. European journal of lipid science and technology, 114(3): 357-366. https://doi.org/10.1002/ejlt.201100296
47. Vinson, J., Dabbagh, Y., Serry, M., Jang, J. (1995). Plant flavonoids especially tea flavonols are powerful antioxidants using an in vitro oxidation model for heart disease. Journal of agriculturaland food chemistry, 43: 28-32. https://doi.org/10.1021/jf00059a005
48. Wanasundara, P. K., Shahidi, F. (2005). Antioxidants: science, technology, and application. In Bailey,s industrial oil and fat products. Shahidi, F. (Eds). John Wiley and Sons, Inc. New Jersey.
49. Widyasanti , Marpaung, D. S. S., Nurjanah, S. (2016). Activitas antijamur ekstrak teh putih (Camelia sinensis) terhadap jamur Candida albicans (Antifungal activity of white tea extract to candid, Journal Teknotan , 10 (2): 7-15.
50. Yaşar, S. B., Baran, E. K., Alkan, M. (2012). Metal Determinations in olive oil. In agricultural and biological sciences: olive oil– constituents, quality, Health properties and bioconversions, 89-108.