Extracts from the leaves of Acanthopanax trifoliatus, harvested at different seasons, were quantitatively analyzed for phenolic contents using high performance liquid chromatographic (HPLC) methods. Samples collected in winter contained high amounts of the major active components, mono and dicaffeoylquinic acid derivatives and flavonoid glycosides. It was found that January and November were the preferred periods for collecting plant material containing high amounts of caffeoyl quinic acid and flavonoid constituents.
PerryLM, MetzgerJ. (1981) Medicinal plants of east and southeast Asia.MIT Press, Cambridge, MA/London. 41–42.
2.
QibaiX, LowryPP. (2004) Araliaceae. Flora of China, 13, 435–491.
3.
PerryLM, MetzgerJ. (1981) Medicinal Plants of East and Southeast Asia: attributed properties and uses. Brittonia, 33, 258–259.
4.
ChiVV. (Ed.) (1997) Vietnamese Medical Plant Dictionary.Ha Noi, Medicine Pub, Vietnam. 564–566.
5.
LoiDT. (Ed.) (2000) Glossary of Vietnamese Medical Plants.Ha Noi, S&T Pub, Vietnam. 379.
6.
SithisarnP, JarikasemS. (2009) Antioxidant activity of Acanthopanax trifoliatus. Medical Principles and Practice, 18, 393–398.
7.
SithisarnP, JarikasemS, ThisayakornK. (2009) Anti-inflammatory and antioxidative effects of leaf extract from Acanthopanax trifoliatus. Planta Medica, 75, 891.
8.
WangH, CaoG, PriorRL. (1996) Total antioxidant capacity of fruits. Journal of Agricultural and Food Chemistry, 44, 701–705.
9.
RababahTM, HettiarachchyNS, HoraxR. (2004) Total phenolics and antioxidant activities of fenugreek, green tea, black tea, grape seed, rosemary, gotu kola and ginkgo extracts, vitamin E, and tert-butylhydroquinone. Journal of Agricultural and Food Chemistry, 52, 5183–5186.
10.
Meteorological Department, Bangkok, Thailand [Online]. Available from: http://www.tmd.go.th [Accessed 2010 February 15].
11.
WangSY, LinHS. (2000) Antioxidant activity in fruits and leaves of blackberry, raspberry, and strawberry varies with cultivar and developmental stage. Journal of Agricultural and Food Chemistry, 48, 140–146.
12.
SilvaBA, MalvaJO, DiasACP. (2008) St. John's Wort (Hypericum perforatum) extracts and isolated phenolic compounds are effective antioxidants in several in vitro model of oxidative stress. Food Chemistry, 110, 611–619.
13.
Rice-EvansC. (2001) Flavonoid antioxidants. Current Medicinal Chemistry, 8, 797–807.
14.
AruomaOI. (1994) Free radicals and antioxidant strategies in sports. Journal of Nutritional Biochemistry, 223, 25–33.
15.
Abad-GarciaB, BerruetaLA, Lopez-MarquezDM, Crespo-FerrerI, GalloB, VicenteF. (2007) Optimization and validation of a methodology based on solvent extraction and liquid chromatography for the simultaneous determination of several polyphenolic families in fruit juices. Journal of Chromatography A, 1154, 87–96.
16.
HäuslerM, GanzeraM, AbelG, PoppM, StuppnerH. (2002) Determination of caffeoylquinic acids and flavonoids in Cynara scolymus L. by high performance liquid chromatography. Chromatographia, 56, 407–411.