• 대한화장품학회지
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• 제38권4호
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• pp.297-304
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• 2012

본 연구의 목적은 생강나무 추출물의 항산화 활성과 타이로시네이즈 저해 활성을 살펴봄으로써 화장품 원료로서의 응용 가능성을 확인하는 것이다. 모든 실험은 생강나무의 50 % 에탄올 추출물, 에틸아세테이트(ethyl acetate) 분획, 아글리콘(aglycone) 분획을 이용하여 진행하였다. 에틸아세테이트 분획의 DPPH (1,1-diphenyl-2-picrylhydrazyl) 소거활성은 기존에 잘 알려져 있는 항산화제인 (+)-${\alpha}$-tocopherol 보다 높은 것으로 나타났다. $Fe^{3+}$-EDTA/ $H_2O_2$ 계에서 생성된 활성산소종에 대한 세 분획의 소거활성(총항산화능)은 대표적인 항산화제인 L-ascorbic acid와 비슷한 것으로 나타났다. Rose-bengal로 증감된 $^1O_2$에 의한 적혈구 파괴에서, 50 % 에탄올 추출물과 에틸아세테이트 분획의 세포보호 효과는 농도 의존적($1{\sim}25{\mu}g/mL$)으로 증가하였다. $10{\mu}g/mL$ 농도를 기준으로 비교하였을 때 에틸아세테이트 분획의 ${\tau}_{50}$은 361.0 min으로 가장 높은 세포 보호 활성을 나타내었다. 타이로시네이즈 저해활성에서 에틸아세티이트 분획과 아글리콘 분획은 알부틴보다 높은 저해 효과를 나타내었다. 이상의 결과들로부터 생각나무 추출물은 활성산소종을 소거하는 항산화제로 여러 산업 분야에 응용 가능할 것이라 생각된다. 또한 알부틴을 대체하는 미백 기능성 소재로서 응용될 수 있는 가능성을 확인하였다.

• 한국식품영양과학회지
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• 제45권7호
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• pp.938-947
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• 2016

본 연구는 한국 고유 식용 자원인 황칠나무의 잎을 이용한 항산화 효과 및 고혈당으로 인한 신경/뇌신경세포 보호 효과를 알아보고자 실시하였다. 황칠나무 잎 추출물의 총폴리페놀 함량, ABTS와 DPPH 라디칼 소거 활성을 측정하였으며 활성이 가장 높은 80% 에탄올 추출물을 이용하여 극성 정도에 따라 분획을 하였다. 이들 중 ethyl acetate 분획물이 총 항산화력(FRAP assay)과 지질과산화물(MDA) 생성 억제 활성이 다른 분획물에 비하여 유의적으로 높은 값을 나타냈다. 이를 이용하여 신경세포로서의 PC12 세포와 인간 뇌조직 유래 뇌신경세포로서의 MC-IXC 세포에서 $H_2O_2$와 고혈당에 의한 세포생존율을 측정하였고, ethyl acetate 분획물은 산화적 스트레스로부터의 효과적인 세포 보호 효과를 나타냈다. 또한, 뇌신경말단에서 신경전달물질(ACh)의 분해를 유발하는 효소(AChE)의 저해 효과를 측정하였고, ethyl acetate 분획물은 유의적인 AChE 저해 효과를 보였다. 마지막으로 황칠나무 잎 ethyl acetate 분획물의 생리활성 물질을 확인하고자 HPLC 분석을 하였으며, 주요 생리활성 물질은 rutin으로 추정되었다. 이러한 연구 결과를 바탕으로 고려할 때 황칠나무 잎 추출물은 천연 항산화제의 역할을 가지고 있을 뿐만 아니라 이를 통해 산화적 스트레스로부터 뇌신경세포 등을 효과적으로 보호할 수 있으며 더불어 AChE 저해 활성을 통한 인지기능 개선 가능 소재로서 연구될 수 있을 것으로 판단된다.

• 한국식품영양학회지
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• 제22권4호
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• pp.618-624
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• 2009

The extract of Platycodi radix has long been used as an anti-inflammatory traditional medicine in Korea for the treatment of bronchitis, asthma and acute respiratory disease. In this study, the anti-inflammatory actions of the methanol extract of Platycodi radix administered via oral administration were evaluated. The results revealed that the extracts exhibited potent anti-inflammatory action. Of the hexane, chloroform, ethyl acetate, butanol and water fractions, the butanol fraction had the most potent anti-inflammatory action. Additioinally the sapogenin obtained through acid hydrolysis of the butanol fraction did not show anti-inflammatory action. These findings confirm the value of Platycodi radix as a traditional Korean medicine.

• 생약학회지
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• 제38권4호
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• pp.334-338
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• 2007

Roots of Rumex crispus (Rc) (Polygonaceae) has been used as therapeutic agents of acute and chronic cutaneous diseases, cathartics, fever and jaundice in folk medicines. Recently, Seeds of Rc has known as a digestive, an anticancer agent and a remedy of acute hepatitis, among many traditional folk medicines. So far it isn't reported about pharmacological effects of Rumecis Semen. The present study describes the preliminary evaluations of biological activities, anti-inflammatory activity (AA, Carrageenan) analgesic activity (writhing test), and hepatoprotective activities ($CCl_4$), of its methanol extract, ethyl acetate fraction and butanol fraction. Among them butanol fraction showed the highest activity in analgesic acivity.

• 한국미생물·생명공학회지
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• 제27권3호
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• pp.197-202
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• 1999

To confirm the effects of binlang(Areca catechu L.) and tansen(Salvia miltriorrhiza bung) on the mutagenicity induced by hydrogen peroxide, SOS Chromotest with Escherichia coli PQ37 and Ames test with Salmonella typhimurium TA104 were perlormed. Methanol-soluble parts of their water extracts showed high inhibitory effect against the mutagenicity of hydrogen peroxide in two bacterial mutation assays. Step-wise fractionation of methanol-soluble part from tansen was done using ethyl acetate, butanol and water. Among these fraction was further partitioned by Sephadex LH-20 column chromtography, and 6 subfractions were obtained. The fraction III showed the strongest inhibitory effects against the mutagenic activities induced by hydrogen peroxide. The inhibition rates of fraction III at concentration of 500$\mu\textrm{g}$/assay were 28%, 30% and 15% against 4-NQO, MNNG and B(a)P, respectively. But the mutagenic potency of AFB1 was increased.

• 생약학회지
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• 제38권1호
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• pp.22-26
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• 2007

Leaves and stem of Viburnum sargentii for. sterile(Caprifoliaceae) has been used as therapeutic agents as a pain of the joints, skin disease as styptics, analgesics for traditional folk medicines. The present study describes the preliminary evaluation of biological activities-analgesic, anti-inflammatory, hepatoprotective activities, of its methanol extract, ethyl acetate fraction and butanol fraction. Among them butanol fraction showed the highest activity in inflammation and writhing test.

• Journal of Microbiology and Biotechnology
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• 제15권2호
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• pp.442-446
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• 2005

Fungicidal activities of Cassia obtusifolia extracts and their active principles were tested against Botrytis cinerea, Erysiphe graminis, Phytophthora infestans, Puccinia recondita, Pyricularia grisea, and Rhizoctonia solani, and compared with synthetic fungicides and two dihydroxyanthraquinones. At 1 g/l, the chloroform fraction of C. obtusifolia extracts showed fungicidal activity against B. cinerea, E. graminis, P. infestans, and Py. grisea, and the ethyl acetate fraction showed fungicidal activity against E. graminis and P. infestans. Danthrone was chromatographically isolated from the chloroform fraction and showed fungicidal activity against B. cinerea, E. graminis, P. infestans, and Py. grisea with 68, 100, 78, and $91\%$ control values at 0.5 g/l, respectively. Specifically, alizarin and quinizarin inhibited E. graminis, P. infestans, and Py. Grisea, but did not inhibit the growth of P. recondita and R. solani. These results indicate at least one of the fungicidal actions of danthrone.

• 한국자원식물학회지
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• 제27권6호
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• pp.642-649
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• 2014

The antioxidant potentials of the methanol extract and its various fractions from Agrimonia pilosa Ledeb were measured as 1,1-diphenyl-2-picrylhydrazyl (DPPH), and 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) radical scavenging abilities as well as the reducing power decreasing NO in vitro. The methanol extract of Agrimonia pilosa Ledeb showed significantly strong scavenging effects on free radicals of DPPH, ABTS, and NO. Hexane fraction (HF), ethyl acetate fraction (EF) and n-butyl alcohol fraction (BF) were prepared by solvent fractionation. By comparison of polyphenol contents among BF and HF, EF with high polyphenol contents showed the highest DPPH, ABTS, and NO scavenging effects with the value of 50.2%, 80.4%, and 65.7%, respectively, at the highest tested dose. HPLC analysis revealed the presence of various phenolic compounds in EF of Agrimonia pilosa Ledeb. These results suggest that EF could be considered as natural antioxidant sources and dietary nutritional supplements to prevent oxidation-related diseases.

• 생약학회지
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• 제22권1호
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• pp.18-21
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• 1991

Campanulin, ${\alpha}-amyrin$, ${\beta}-amyrin$, uvaol, simiarenol, ursolic acid and oleanolic acid were isolated from the ethyl acetate fraction of the leaves of Rhododendron brachycarpum and their structures were identified by spectroscopic and chemical methods.

• Natural Product Sciences
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• 제3권2호
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• pp.104-105
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• 1997

In the course of continous work on tubers of Gastrodia elata, a new constituent was isolated from the ethyl acetate soluble fraction prepared from the methanol extract. The structure of the compound was identified as ${\alpha},{\alpha}'-[bis-2-(5-carboxaldehydo)furanyl]-dimethyl$ ether from the elemental analytical and spectroscopic data. This compound was once isolated from Cirsium chlorolepis and named as cirsiumaldehyde. This is the first furan type compound isolated from Gastrodia elata.