• 생명과학회지
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• 제22권10호
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• pp.1330-1338
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• 2012

본 연구는 카카오를 화장품 소재로 활용하기 위하여 항산화 및 항염증 효과를 검증하여 기능성 화장품 소재로서의 가능성을 검토하였다. 아세톤 추출물을 이용하여 클로로포름층, 에틸아세테이트층, 부탄올층, 물층의 극성별로 분획을 실시하였다. 카카오 분획물의 전자공여능은 100 ${\mu}g/ml$에서 에틸아세테이트 분획물이 76.2%, 부탄올 분획물이 53.9%의 소거능을 나타내었다. 또한, superoxide anion radical 소거능 측정 결과, 에틸아세테이트 분획물과 부탄올 분획물이 50 ${\mu}g/ml$에서 각각 76.09%, 51.4%의 소거능이 나타났고, $Fe^{2+}$, $Cu^{2+}$의 첨가에 따른 지방산패 억제능에서 $Fe^{2+}$를 첨가한 군에서는 에틸아세테이트 분획물이 50 ${\mu}g/ml$에서 64%로 $Cu^{2+}$를 첨가한 군보다 저해능이 높았다. 항염증 효과 측정으로 hyaluronidase 저해 활성을 측정한 결과, 부탄올 분획물의 경우 100 ${\mu}g/ml$에서 53.04%의 저해활성을 나타내었으며, lipoxygenase 저해 활성 측정결과 10 ${\mu}g/ml$에서 51.32%의 저해활성을 나타내었다. 대식세포를 이용한 nitric oxide (NO) 저해활성을 측정한 결과 카카오 에틸아세테이트 분획물에서 가장 높은 NO 저해활성을 나타냄을 확인할 수 있었다. 또한 대식세포 내에서 에틸아세테이트 분획물 100 ${\mu}g/ml$ 농도에서 iNOS, COX-2 단백질 발현을 저해하였다.

• 한국식품영양과학회지
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• 제30권5호
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• pp.943-948
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• 2001

마우스 뇌조직에서 지질과산화를 막아주는 것으로 알려진 청겨자채에 대해서 50%MeOH 추출물(2mg/mL)을 사용하여 소 뇌조직의 산화적스트레스를 유발한 ascorbate/Fe$^{3+}$ system에서 항산화 활성을 조사하였다. 청겨자채 추출물의 용매순차추출 후 TBARS 활성을 각각 용매 분획(100)$\mu\textrm{g}$/mL)별로 확인한 결과 각각의 용매 분획 중 n-BiOH 분획 (49%)이 가장 높았고, EtOAc(40%), H$_{2}$O(9%) 및 n-hexane (0%) 순이었다. n-BuOH 분획을 silica gel column chroma-tography를 반복하였으며, CE, TLC를 통해서 sinapic acid와 ferulic acid를 확인하였다. CE를 통하여 그 함량을 정량한 결과, 건조중량(g)당 sinapic acid는 24.3 ppm 이었고 ferulic acid는 42.8 ppm으로 나타났다. 최종 정제활성물질을 $^{1}$J-NMR(CDCL$_{3}$)와 $^{13}$C-NMR(CDCL$_{3}$)로 확인하였으며 sinapic acid methyl ester, ferulic acid acid와 ferulic acid와 RF치가 일치하는지 여부를 TLC상에서 비교하였다. 동일한 50$\mu\textrm{g}$/mL 농도에서 sinapic acid methyl ester는 40%, ferulic acid methyl ester 는 35%의 항산화 활성을 나타내었으며 이것은 시판되는 표준물질은 sinapic acid(22%)와 ferulic acid (18%)에 비해 약간 높게 나타났다. 이것은이 화합물에 라디칼을 소거하는 작용기와 관계가 있는 것으로 여겨진다. 청겨자채 추출물 중에도 항산화 활성이 비교적 널리 분포된 것으로 보아 이 성분들은 체내에서 단독으로 또는 상호작용으로 항산화 작용을 나타낼 것으로 예상된다.

• Natural Product Sciences
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• 제6권3호
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• pp.135-138
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• 2000

MeOH extract of Cuscuta chinensis seeds was fractionated with n-hexane, EtOAc and BuOH successively, and antioxidant activities were tested for all fractions using DPPH free radical scavenging method. In the tested fractions, EtOAc fraction showed high antioxidant activity$(EC_{50},\;50\;{\mu}g)$ From the EtOAc fraction, five compounds have been isolated. On the basis of spectral data, these compounds were identified as ${\beta}-sitosterol$, methyl 4-hydroxy-3,5-dimethoxycinnamate, ${\beta}-sitosterol-3-O-{\beta}-D-glucopyranoside$, caffeic acid, quercetin, kaempferol and calycopteretin. Among these compounds, ${\beta}-sitosterol$ and ${\beta}-sitosterol-3-O-{\beta}-D-glucopyranoside$ showed no antioxidant activity. $EC_{50}$ values of methyl 4-hydroxy-3,5-dimethoxycinnamate, caffeic acid, quercetin, kaempferol and calycopteretin were 0.6, 8, 19, 17 and $12\;{\mu}g$, respectively.

• 생약학회지
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• 제35권3호통권138호
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• pp.184-188
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• 2004

This study was carried out to evaluate glutathione S-transferase (GST) activity and hyaluronidase inhibitory effect of medicinal plants. The EtOH extracts of 20 species plants were tested. As the result, Acorus gramineus and Pueraria lobata exhibited GST activity. On the continuous experiment, the n-BuOH fraction of Acorus gramineus and the $H_2O$ fraction of Pueraria lobata showed the elevation of GST activity. On the experiment of hyaluronidase inhibitory effect, Acorus gramineus exhibited a potent inhibitory activity. These results suggest that the extract of Acorus gramineus can be applicable for the development of a new anti-inflammatory agent.

• 대한약학회:학술대회논문집
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• 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2-2
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• pp.207.1-207.1
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• 2003

The Aster tataricus is a chinese traditional medicine called “Ziwan” which has an expectorative and remediable cough action. The anti-oxidant activities of A. tataricus were investigated. The MeOH extract of A. tataricus showed strong anti-oxidant activity in the NBT(nitroblue tetrazolium) method system, and thus fractionated with several solvents in to the EtOAc, n-BuOH, CH$_2$Cl$_2$, H$_2$O fraction. The EtOAc soluble fraction exhibiting strong anti-oxidant activity was further purified by repeated silica gel and sephadex LH-20 column chomatography. (omitted)

• 농업과학연구
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• 제39권4호
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• pp.583-589
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• 2012

In the continued research on natural fungicides for the control of plant diseases by using plant-derived products, we found that Reynoutria elliptica. had a strong fungicidal activity against several plant pathogens. R. elliptica (3.2 kg) were extracted with 80% aq. MeOH and the concentrated extracted was partitioned with n-hexane, EtOAc, n-BuOH and $H_2O$ successively. The four layers were tested their disease control efficacies against 4 plant disease such as rise blast (RCB), tomato grey mold (TGM), tomato late blight (TLB), and barly powdery mildew (BPM). The n-hexane fraction was highly active showing over 95% control against TLB and BPM. and the EtOAc fraction was highly active showing over 95% control against RCB, TLB, and BPM. By using silica gel chromatography, MPLC, and HPLC, three compounds that were expected to have antifungal activity were isolated. Their chemical structures were elucidated as physcion, emodin, and emodie-8-O-glucoside by EI-MS and NMR spectroscopic analyses.

• Food Science and Biotechnology
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• 제18권6호
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• pp.1523-1527
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• 2009

The present study was to investigate the in vitro antioxidant potential of hot water extract and its fractions from dichloromethane ($CH_2Cl_2$), ethyl acetate (EtOAc), n-butanol (n-BuOH), and water ($H_2O$) of castor-aralia (Kalopanax pictus) leaves using different antioxidant tests. Among these crude extract and fractions, EtOAc fraction exhibited higher antioxidant potency than others in 1,1-diphenyl-2-pricylhydrazyl (DPPH) free radical scavenging, reducing power assay, and reactive oxygen species (ROS) scavenging activity. However, $CH_2Cl_2$ fraction showed higher hydroxyl radical scavenging and DNA damage protective activity. This work demonstrates the potential of castor-aralia leaves as antioxidant functional food ingredients.

• 생약학회지
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• 제22권2호
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• pp.73-77
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• 1991

Further studies have been done on the constituents of the tubers of Liriope spicata $L_{OUR}$ (Liliaceae). Four steroidal glycosides, tentatively designated as compounds I. II, III and IV, were isolated from the n-BuOH soluble fraction of this plant. The structures of these glycosides were established as ${\beta}-sitosterol$ glucoside, prosapogenin II of spicatoside A, ophiopogonin B, and prosapogenin III of spicatoside A.

• 약학회지
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• 제45권6호
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• pp.611-616
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• 2001

The antioxidant activity of Persicaria thunberii (Polygonaceae) was determined by measuring the radical scavenging effect on 1,1-diphenyl-2-pocrylhydrazyl (DPPH) radical. The methanol extract of thunbergii showed strong radical scavenging activity at an I $C_{50}$ concentration of 12.2$\mu\textrm{g}$/ml, and thus fractionated by solvent extraction. The EtOAc soluble fraction was stronger than the others, and was further purified by silica gel and Sephadex LH-20 column chromatography, Antioxidant isorhamnetin, quercetin (2), quercitrin (3) and isoquercitrin (4) were isolated from the EtOAc soluble fraction. And isorhamnetin-3-sulfate (5) was isolated from the n-BuOH fraction. Compounds 2, 3 and 4 were found to have strong antioxidative potency.

• Applied Biological Chemistry
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• 제47권1호
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• pp.130-134
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• 2004

용안육을 80% MeOH 용액으로 추출하고, 추출물을 EtOAc, n-BuOH 및 물로 분배, 추출하였다. 이 중 n-BuOH 분획을 silica gel, ODS 및 Sephadex LH-20 column chromatography로 정제하여 4종의 화합물을 분리하였다. 각 화합물의 화학구조는 NMR, MS및 IR 등의 스펙트럼 데이터를 해석하여, 1,1-dimethyl-2-propenyl $1-O-{\beta}-D-glucopyranoside$, ethyl ${\beta}-D-glucopyranoside$, 5-(hydroxymethyl)-2-furfuraldehyde 및 uridine으로 동정하였다. Uridine은 $5\;{\mu}g/ml$의 농도에서 collagen으로 유도한 혈소판 응집을 78% 저해하였다.