Abstract
The number of elderly population is continually growing in Thailand. Major health problems mostly occurred in the elder are non-communicable diseases namely Alzheimer's disease and type 2 diabetes mellitus. In current study, phytochemical composition, anti-amylase and anti-acetylcholinesterase activities of leaf extracts and herbal tea from Dolichandrone serrulata (DC.) Seem were determined. The result showed that extracts and herbal tea samples of D. serrulata leaves had effective in inhibition of amylase (an effective concentration at half maximum (EC50) = 1.21 to 23.80 mg/ml) and acetylcholinesterase activities (EC50 = 2.63 to 49.55 mg/ml). The effect of infusion time on the inhibition of amylase indicated that the best infusion time for preparing herbal tea beverage was 3 min, while the inhibition of acetylcholinesterase was 5 min. The fourier transform infrared spectroscopy (FTIR) and gas chromatograph - mass spectrometer (GC–MS) data indicated the presence of phytochemicals in the extracts and herbal tea samples related to phenolic compounds and flavonoids. The principal component analysis (PCA) result from FTIR data could discriminate herbal tea samples from the ethanol and aqueous extracts better than the PCA biplot of anti-amylase activity and anti-acetylcholinesterase activity.
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