Pengaruh Cara Pengeringan dengan Microwave terhadap Perolehan Kadar Senyawa Fenolat dan Aktivitas Antioksidan dari Daun Dewa (Gynura pseudochina (Lour.), Merr.)

Zet Rizal, Deswati Deswati, Harrizul Rivai

Sari


The research about the effect of microwave drying methods on content of phenolic compounds and antioxidant activity of Gynura pseudochina,(Lour.) Merr. have been done. The determination of phenolic compounds was carried out according to Folin-Ciocalteu method and antioxidant activity was evaluated by DPPH method, calculated as gallic acid equivalent (GAE). The research showed that the highest phenolic compounds and the strongest antioxidant activity obtained by microwave drying method compared by air drying method. The phenolic compounds each gram sample by using microwave drying is 1.673 mg phenolic compounds and antioxidant activities were calculated as the IC50 at concentration 2.876 mg/mL.


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Referensi


Javanmardi, J., C. Stushnoff, E. Locke, and J.M. Vivanco, 2003, “Antioxidant Activity and Total Phenolic content of Iranian Ocimum accessions”, www.elsevier.com/locate/foodchem, 83, , 547-550.

Keinanen, M., and R.J. Tiitto, 1996., “Effect of Sample Preparation

Method on Birch (Betula Pendula Roth) Leaf Phenolics”, J. Agric Food

Chem, 44, , 2724 – 2727.

Lee, H.J., 2006,” How Microwaves Work”, Colorado University,US Patent

,Newyork. Molyneux, P., 2004, “The Use of the Stable Free Radical Diphenylpycrylhydrazyl (DPPH) for Estimating Antioxidant Activity”, Songklanakarin J. Sci. Technol., 26 (2), 211-219.

Mosquera, O.M., Y. M. Correa, D. C. Buitrago, and J. Nino, 2007, “Antioxidant Activity of Twenty Five Plants from Colombian Biodiversity”, Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol 102 (5), , 631 – 634.

Okawa, M., J. Kinjo, T. Nohara, and M. Ono, 2001., “DPPH ( 1 , 1 - Diphenyl – 2 - Picrylhydrazyl) Radical Scavenging Activity of Flavonoids Obtained from Some Medicinal Plants”, Biol Pharm. Bull. 24 (10), 1202-1205.

Pourmorad, F., S. J. Hosseinimehr, N. Shahabimajd, 2006, “Antioxidant Activity, Phenol and Flavonoid Content of Some Selected Iranian Medicinal Plants”, African journal of Biotechnology, Vol. 5 (11), 1142–1145.

United States Department of Agriculture, 1999.,“Sample Preparation for Phenolic Analysis”,

hhtp://www/ars/usda.gov/is/np/pheno lics/sppa.htm, United States, 1 April.

Velioglo, Y.S., G. Mazza, ,L. Gao, and B.D. Oomah. 1998., “Antioxidant Activity and Total Phenolics in Selected Fruits, Vegetables and Grain Products”, J. Agric. Food. Chem. 46, 4113 – 4117.

Waterhouse, A., 1999., “Folin Ciocalteu Micro Methoed for Total Phenol in Wine”, American Journal of Enology

and Viticulture, 28, , 1-3.




DOI: http://dx.doi.org/10.52689/higea.v1i1.1

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