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- 저자 : Ufuk Koca (검색결과 2 건)
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Ufuk Koca-Caliskan,Ismet Yilmaz,Asli Taslidere,Funda N. Yalcin,Ceylan Aka,Nazim Sekeroglu 한국식품영양과학회 2018 Journal of medicinal food Vol.21 No.6
Cuscuta arvensis Beyr. is a parasitic plant, and commonly known as “dodder” in Europe, in the United States, and “tu si zi shu” in China. It is one of the preferred spices used in sweet and savory dishes. Also, it is used as a folk medicine for the treatment particularly of liver problems, knee pains, and physiological hepatitis, which occur notably in newborns and their mothers in the southeastern part of Turkey. The purpose of this study was to investigate the hepatoprotective effects and antioxidant activities of aqueous and methanolic extracts of C. arvensis Beyr. on acetaminophen (APAP)-induced acute hepatotoxicity in rats. The results were supported by subsequent histopathological studies. The hepatoprotective activity of both the aqueous and methanolic extracts at an oral dose of 125 and 250 mg/kg was investigated by observing the reduction levels or the activity of alkaline phosphatase, alkaline transaminase, aspartate aminotransferase, blood urine nitrogen, and total bilirubin content. In vivo antioxidant activity was determined by analyzing the serum superoxide dismutase, malondialdehyde, glutathione, and catalase levels. Chromatographic methods were used to isolate biologically active compounds from the extract, and spectroscopic methods were used for structure elucidation. Both the methanolic and aqueous extracts exerted noticable hepatoprotective and antioxidant effects supporting the folkloric usage of dodder. One of the bioactive compounds was kaempferol-3-O-rhamnoside, isolated and identified from the methanolic extract.
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Ufuk Koca,Ipek Süntar,Esra Küpeli Akkol,Demet Yılmazer,Murat Alper 한국식품영양과학회 2011 Journal of medicinal food Vol.14 No.1
Leaves and fruits of Olea europaea L. (olive) have been used externally as an emollient for skin ulcers and for healing of inflammatory wounds. n-Hexane and aqueous extracts, prepared from the dried leaves of olive, were evaluated for their wound healing activity by using in vivo wound models of linear incision and circular excision in comparison with the reference ointment Madecassol^dⓡ(Bayer, Istanbul, Turkey). The group of animals treated with the aqueous extract demonstrated increased contraction (87.1%) on excision and a significant increase in wound tensile strength (34.8%) on incision models compared to the other groups. Moreover, the antioxidant activity assay showed that aqueous extract has higher scavenging ability than the n-hexane extract. According to the experimental data, the aqueous extract of O. europaea leaves displayed wound healing activity. Secoiridoid oleuropein (4.6059%) was identified as the major active compound according to high-performance liquid chromatography analysis of the aqueous extract.
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