MATERIALS AND METHODS
Plants,materials and chemicals
Fresh C. asiatica was obtained from a local wet market in Penang,
Malaysia. Folin–Ciocalteu phenol reagent, sodium carbonate,
aluminium chloride, sodium hydroxide, caffeine and iron(III)
chloride were purchased from Merck (Darmstadt, Germany).
The following were purchased from Sigma-Aldrich (St Louis,
MO, USA): caffeic acid, gallic acid, catechin, chlorogenic acid,
vanillic acid, rutin, rosmarinic acid, quercetin, luteolin, kaempferol,
apigenin, naringin, sodium nitrite, vanillin, DPPH (1,1-diphenyl-
2-picrylhydrazyl) radical and TPTZ (2,4,6-tripyridyl-s-triazine). All
other chemicals used in the study were of analytical grade.
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Materiale en metodes
Plante, materiale en chemikalieë
Vars C. asiatica is verkry uit 'n plaaslike Wet Market in Penang,
Maleisië. Folin-Ciocalteu fenol reagens, Natriumkarbonaat,
Aluminium chloride, Natriumhidroksied, kafeïen en Yster (III)
chloried aangekoop van Merck (Darmstadt, Duitsland).
Die volgende is gekoop van Sigma-Aldrich (St Louis,
MO, USA): caffeic. suur, gallussuur, catechin, chlorogenic suur,
vanillic suur, rutin, Rosmarinic suur, quercetin, Luteolin, kaempferol,
apigenin, naringin, natrium nitriet, vanilline, DPPH (1,1-Diphenyl-
2-Picrylhydrazyl) radikale en TPTZ (2. , 4,6-tripyridyl-s-triasien). Alle
ander chemikalieë gebruik word in die studie was van 'n analitiese graad.
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