000 02533nam a2200241 a 4500
001 vtls000068141
003 KUKTEM
005 20251114204526.0
008 130121t2012 my a f m 000 0 eng d
020 _aTHE0003961(Local)
039 9 _a201905141455
_bfauzi
_c201301210830
_dFida
_y201301210827
_zFida
040 _aUMP
090 _aTP156.E8 A366 2012 rs Bc.
100 0 _aAdnor Alhaimi Adam
245 1 0 _aAntioxidant activity of ethanolic extract of some malaysian herbs /
_cAdnor Alhaimi Adam
260 _aKuantan, Pahang :
_bUMP,
_c2012
300 _axiv, 77 p. :
_bill. (some col.) ;
_c30 cm. +
_e1 CD-ROM
502 _aProject paper (Bachelor of Chemical Engineering (Biotechnology)) -- Universiti Malaysia Pahang - 2012
504 _aBibliography : p. 55-58
520 3 _aAntioxidant, usually found in food has the ability to prevent the oxidative damage to body cell by trapping free radicals, a highly unstable molecule. In this research, the antioxidant activity of extract from three selected Malaysian herbs was investigated. The herbs were Euodia redlevi (Tenggek Burung), Cosmos caudatus (Ulam Raja) and Premma cordiflora (Bebuas). Besides, the Vitamin C content in the herbs was also determined. The herbs were collected from Tanjung Sedili (Kota Tinggi, Johor) and Kuantan (Pahang). The herbs were extracted using sonication extraction method at different interval of times (30, 60, 90 and 120 minutes) and at different concentrations of solvent (50%, 70% and 90% of ethanol). After the extraction, the extracts were analyzed for total phenolic content using Folin-Ciocalteu’s reagent and antioxidant activity using DPPH assay. The results show that the three herbs exhibited significant value of ascorbic acid content. The highest amount of ascorbic acid was obtained in Cosmos caudatus in 60 minutes of extraction using 70% of ethanol. As for Premma cordiflora and Euodia redlevi, the highest amount of ascorbic acid were obtained in 90 minutes of extraction using 90% of ethanol. The herbs extracts of the said parameters were analyzed again for their ascorbic acid or vitamin C content using High Performance Liquid Chromatography (HPLC). The results showed that Cosmos caudatus has the highest vitamin C content, followed by Premma cordiflora and finally Euodia redlevi. This research provides the information on the promising source of natural antioxidants in Malaysia.
650 0 _aExtraction (Chemistry)
999 _aVIRTUA40
_c3537
_d3543
999 _aVTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*9992