E Scientific Research of Guizhou (No.20126006) for the monetary assistance. Author facts 1 Guizhou Fruit Institute, Guizhou Academy of Agricultural Sciences, Guiyang 550006, P R China. 2Research Institute of Conventional Chinese Medicine, Yangtze River Pharmaceutical Group Beijing Haiyan Pharmaceutical Co., Ltd, Beijing 102206, P R China. 3State crucial Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Crucial Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, P R China. Received: 15 December 2013 Accepted: 30 December 2013 Published: 3 January 2014 References 1. Jaafar RA, Rahman ARBA, Mahmod NZC, Vasudevan R: Proximate evaluation of dragon fruit (Hylecereus polyhizus). Am J Appl Sci 2009, 6:1341?346. 2. Choo WS, Yong WK: Antioxidant properties of two Drug Metabolite Chemical manufacturer species of Hylocereus fruits. Adv Appl Sci Res 2011, two:418?25. 3. De Freitas ST, Mitcham EJ: Excellent of pitaya fruit (Hylocereus undatus) as influenced by storage temperature and packaging. Sci Agric 2013, 70:257?62. 4. Rebecca OPS, Boyce AN, Chandran S: Pigment identification and antioxidant properties of red dragon fruit (Hylocereus polyrhizus). Afr J Biotechnol 2010, 9:1450?454. 5. Esquivel P, Stintzing FC, Carle R: Phenolic compound profiles and their corresponding antioxidant capacity of purple pitaya (Hylocereus sp.) genotypes. Z Naturforsch C 2007, 62:636?44. six. Nurliyana R, Syed Zahir I, Mustapha Suleiman K, Aisyah MR, Kamarul Rahim K: Antioxidant study of pulps and peels of dragon fruits: a comparative study. Int Meals Res J 2010, 17:367?75. 7. Herbacha KM, Stintzinga FC, Elssb S, Prestonb C, Schreierb P, Carlea R: Isotope ratio mass spectrometrical analysis of betanin and isobetanin isolates for authenticity evaluation of purple pitaya-based merchandise. Meals Chem 2006, 99:204?09. eight. Herbach KM, Stintzing FC, Carle R: Identification of heat-induced degradation merchandise from purified betanin, phyllocactin and hylocerenin by high-performance liquid chromatography/electrospray ionization mass spectrometry. Rapid Commun Mass Sp 2005, 19:2603?616. 9. Janeczko A: The presence and Bak manufacturer activity of progesterone within the plant kingdom. Steroids 2012, 77:169?73. 10. Nicholas HJ: Biosynthesis of -sitosterol and pentacyclic triterpenes of Dalvia officinalis. J Bio Chem 1962, 237:1676?680. 11. Patocka J: Biologically active pentacyclic triterpenes and their present medicine signification. J Appl Biomed 2013, 1:7?two. 12. Thao NTP, Hung TM, Lee MK, Kim JC, Min BS, Bae K: Triterpenoids from Camellia japonica and their cytotoxic activity. Chem Pharm Bull 2010, 58:121?24. 13. Lin L, Gao Q, Cui C, Zhao H, Fu L, Chen L, Yang B, Luo W, Zhao M: Isolation and identification of ent-kaurane-type diterpenoids from Rabdosia serra (MAXIM.) HARA leaf and their inhibitory activities against HepG-2, MCF-7, and HL-60 cell lines. Meals Chem 2012, 131:1009?014.DPPH free radical scavenging assayThe DPPH totally free radical scavenging assay has been broadly used to evaluate the antioxidant capacity, which is stable as a result of its resonance stability and particular blockade of benzene rings [27,28]. The purple chromogen radical DPPH is decreased by antioxidant compounds for the corresponding pale yellow hydrazine [29]. The antioxidant activity of plant extracts and antioxidant standard have been evaluated around the basis of radical scavenging effect in the steady DPPH totally free radical. In its radical type, DPPH includes a characteristic absorption at 515 nm in ethanol, which d.
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