• 한국식품영양학회지
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• 제30권2호
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• pp.211-217
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• 2017

본 연구는 국내에서 주로 소비되는 곡류를 사용하여 UVB를 조사한 인체 피부 섬유아세포에서 항산화 효능과 MMP-1 및 수용성 콜라겐의 변화를 측정하여 광노화 억제 효능을 평가하였다. 또한 곡류 추출물의 항산화 활성 및 항산화 성분을 측정하고, 항산화력과 항산화 성분과의 상관성을 비교 분석하였다. 7종의 곡류 추출물(백미, 현미, 보리, 율무, 귀리, 수수, 흑미)은 $30mJ/cm^2$ UVB에 노출된 인체 피부 섬유아세포에서 광노화에 대해 세포 보호효과가 있는 것을 확인하였다. 또한 곡류 추출물의 처리는 UVB 조사에 따른 MMP-1의 생성을 감소시키고, 수용성 콜라겐의 분해를 저해하였으며, ROS의 생성도 억제하였다. 7종의 곡류 메탄올 추출물에 대한 총 폴리페놀 함량을 분석한 결과, 흑미와 수수가 다른 곡류에 비해 높은 항산화 성분을 함유하고 있었으며, DPPH 및 ABTS 라디칼 소거능도 높은 활성을 나타냈다. 곡류 추출물의 항산화 성분과 항산화 활성과의 상관분석 결과, 폴리페놀 함량이 높을수록 DPPH 라디칼 소거능($R^2=0.9936$), ABTS 라디칼 소거능($R^2=0.9456$)이 증가하는 것으로 나타났다. 따라서 곡류 추출물은 항산화 성분을 다량 함유하고 높은 항산화 활성을 지녔으며, UVB 조사에 의한 ROS로부터 보호하여 MMP-1의 생성을 감소시키고, 수용성 콜라겐의 분해를 억제시켜 광노화 보효호과를 나타내는 것을 확인하였다. 본 연구 결과, 곡류 추출믈의 항산화 및 광노화 보호효능 입증으로 곡류 추출물을 항주름 기능성 소재에 활용할 수 있을 것으로 판단된다.

• Food Science and Biotechnology
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• 제16권3호
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• pp.451-456
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• 2007

The potential antioxidant activities of methanolic extracts from soybean and rice fermented with Monascus sp. were investigated. M. pilosus IFO 480 and M. anka IFO 478 were screened as a suitable strain to promote the antioxidant activities in soybean- and rice- fermentation. The methanol extracts from soybean and rice after fermenting for 20 days at $30^{\circ}C$ resulted in a significant increase in the antioxidant capacities expressed as radical (ABTS and DPPH) scavenging assay and peroxidation inhibition (%) by thiocyanate method and increased (p<0.01) by a 2.6 to 3.1-fold compared with those of the unfermented products. The average antioxidant potentials of Monascus-fermented soybean extracts (MFSE) were significantly (p<0.01) stronger than Monascus-fermented rice extracts (MFRE). A linear correlations between free radical scavenging activity of MFSE and the total phenolics content (r=0.84) and total flavonoids content (r=0.81) were observed. These results indicated that MFSE exhibited stronger (p<0.01) antioxidant activity and contained significantly higher levels (p<0.05) of phenolics than MFRE.

• 대한본초학회지
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• 제25권2호
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• pp.81-88
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• 2010

Objectives : Sophorae Radix (SR), the dried root of Sophorae Flavescens Aiton, has been used to treat atherosclerosis, arrhythma and skin diseases including scabies and eczema. The present study was examined to evaluate antimicrobial activities of SR extracts against oral microorganism. Methods : Antimicrobial properties of SR extracts were determined by agar diffusion method and minimum inhibitory concentration (MIC) against Streptococcus mutans, Streptococcus sobrinus and Actinomyces viscosus. Analysis of kurarinone from SR extracts was conducted using UPLC (Ultra Performance Liquid Chromatography). Results : The ethanolic extracts of SR showed stronger antimicrobial effect than methanolic extracts, while the aqueous extracts of SR had no activity. In addition, the higher content of kurarinone was found in ethanolic extracts than methanolic extracts. The purified kurarinone from ethanolic extracts showed potent antimicrobial activity with the MIC value of $3.9{\sim}7.8{\mu}g/m{\ell}$. Conclusion : An ethanolic extract of SR showed antimicrobial properties against several oral microorganisms, and kuranrinone contributed to antimicrobial action of SR. Thus, ethanolic extracts of SR or purified kurarinone should be beneficial for the preparation of the useful agent for treating oral disease including anticaries.

• 한국식품과학회지
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• 제29권5호
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• pp.860-868
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• 1997

여러 종류(8종)의 유지로 부터 추출한 불검화물과, 강력한 자동산화억제력이 있다고 알려진 53종의 식물체(농산물 및 생약) 메탄을 추출물을 유지에 첨가한후 $180^{\circ}C$에서 14 혹은 16시간 연속 가열하는 동안 유지의 지방산조성을 측정하여 이들 추출물들이 유지의 고열 가열 산화에 미치는 영향을 연구하였다. 추출된 유지의 불검화물들은 모두 $180^{\circ}C$의 고온 가열산화 조건에서 항산화력을 나타내지 못하였다. 그러나 53종의 농산물 및 생약중에서는 일부 종들은 강력한 가열산화 억제력을 나타내었다. 특히, 대황, 백굴체, 정향 등의 메탄올 추출물은 강력한 가열산화 억제력을 나타내었다. 또한 이들 대황, 백굴체 및 정향의 메탄올 추출물들이, 면실유를 $180^{\circ}C$에서 1일 7시간씩 8일간 가열 처리하는 과정에서 면실유의 linoleic acid 파괴 및 중합체 생성에 미치는 영향을 연구하였다. 이 결과 정향 및 백굴체추출물은 $180^{\circ}C$에서 장기간의 가열조건에서도 linoleic acid 파괴 억제 및 중합체 생성을 억제하는 효과가 크게 나타낸 반면, 대황의 경우에는 장기 가열산화 조건에서 지방산의 파괴에 대한 억제력은 미미하였으나, 중합체 생성억제력은 비교적 양호하였다.

• Preventive Nutrition and Food Science
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• 제22권2호
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• pp.107-117
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• 2017

The purpose of this study was to evaluate the antioxidant and anticholinesterase activities of yellow and white bitter yams from South Western Nigeria using methanolic extraction and simulated gastrointestinal digestion models. The phenolic compounds in the bitter yam varieties were evaluated by high performance liquid chromatography with a diode array detector (HPLC-DAD). The total phenolic content of the bitter yams was measured by the Folin-Ciocalteu method, reductive potential by assessing the ability of the bitter yam to reduce $FeCl_3$ solution, and the antioxidant activities were determined by the 2,2-diphenyl-1-picrylhydrazyl radical ($DPPH^{\cdot}$) scavenging activity, 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radical cation ($ABTS^{{\cdot}+}$) scavenging activity, nitric oxide radical ($NO^{\cdot}$) scavenging ability, hydroxyl radical scavenging ability, and ability to inhibit $Fe^{2+}$-induced lipid oxidation. The HPLC-DAD analysis revealed the presence of some phenolic compounds in the studied bitter yam varieties, with varying degree of quantitative changes after cooking. The antioxidant indices (total phenolic content, total flavonoid content, reducing power, $DPPH^{\cdot}$ scavenging activity, $ABTS^{{\cdot}+}$ scavenging activity, and $NO^{\cdot}$ scavenging activity) were higher in the simulated gastrointestinal digestion model compared to the methanolic extract, with the in vitro digested cooked white bitter yam ranking higher. Similarly, the in vitro digested yams had a higher inhibitory action against lipid oxidation compared to the methanolic extracts, with the cooked white bitter yam ranking high. The methanolic extracts and in vitro enzyme digests showed no acetylcholinesterase inhibitory abilities, while methanolic extracts and the in vitro enzyme digest displayed some level of butyrylcholinesterase inhibitory activities. Therefore the studied bitter yams could be considered as possible health supplements.

• 대한수의학회지
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• 제45권3호
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• pp.341-350
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• 2005

To assess the antioxidative activity of 12 medicinal plants on lipid peroxidation, twelves traditional medicinal plants extracted with 95% methanol were investigated the antioxidative activity using DPPH, thiocyanate acid method, and thiobarbituric acid (TBA) methods. Out of 12 medicinal plants extracted with methanol, the extraction yields of Sedum kamtschaticum was the highest values (49.46%) among them and Geranicum sibiricum, Saururus chinensis root (R), Agrimonia pilosa leaf (L), Agrimonia pilosa root was the lowest value (9.97%). Radical scavenging effect of the selected traditional medicinal plants extracted from different extract solution were examined by 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical method. Antioxidative activity of methanolic extracts was higher than those of ethanol and n-hexane extracts. Scavenging effects in Sedum kamtaschaticum (R) determined by DPPH radical showed the highest among the 12 plants. The antioxidative effects of the first four medicinal plants were similar to those of butylated hydroxyanisole (BHA), and butylated hydroxytoluene (BHT), but higher than that of tocopherol, which was used as a handled control. Antioxidative effects of each indicated concentration of the methanolic extracts on linoleic acid by thiocyanate method was the highest in Sedum kamtschaticum and followed by Geum japonicum and Agrimonia pilosa and their antioxidative effect were similar to those of BHA, and BHT, but higher than that of tocopherol. Antioxidative effects of the selected medicinal methanolic extract on linoleic acid by thiocyanate acid method were examined for 15 days. Peroxidation of control and tocopherol group occurred on days 5 and 9, respectively, but BHA, BHT, selected medicinal methanolic extract group did not occur until on day 15. Antioxidative effects of the selected medicinal methanolic extract on linoleic acid by TBA method were examined for 15 days. Antioxidative activity was similar to those obtained by thiocyanate acid method.

• Mycobiology
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• 제29권1호
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• pp.63-63
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• 2001

• Advances in Traditional Medicine
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• 제7권1호
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• pp.46-50
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• 2007

Callus cultures of Convolvulus microphyllus Sieb. was induced on Murashige and Skoog's medium supplemented with 2,4-dichloro phenoxy acetic acid, 6-benzyl adenine, indole acetic acid and kinetin (1 ppm each). Methanolic extracts of whole plant, leaf, stem and leaf and stem calli were tested for anticonvulsant activity against standard drug phenytoin using maximal electroshock model on mice. It was observed that the animals treated with methanolic extracts of stem callus, leaf callus and whole plant (200 mg/kg, oral) showed significant protection against tonic convulsions induced by transcorneal electroshock. Anticonvulsant activity of methanolic extract of stem callus was comparable to that of standard drug phenytoin.

• Advances in Traditional Medicine
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• 제9권2호
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• pp.182-185
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• 2009

Amoora cucullata (Meliaceae), a mangrove plant, has folkloric reputation as a medicinal agent in Bangladesh. In this study, the n-hexane, ethyl acetate and methanolic extracts of the stem bark of this plant were subjected to microbiological investigation and brine shrimp lethality bioassay. In case of antimicrobial screening, the ethyl acetate and methanolic extracts appeared to be potent in terms of both zone of inhibition and spectrum of activity showing the average zones of inhibition 8 - 14 mm and 9 - 16 mm, respectively. In the brine shrimp lethality bioassay, the methanolic extract demonstrated highest cytotoxicity having $LC_{50}$ of $0.549{\mu}g/ml$, whereas the ethyl acetate and n-hexane extract showed $LC_{50}$ of 7.943 and $17.180{\mu}g/ml$, respectively.

• Mass Spectrometry Letters
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• 제15권2호
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• pp.95-106
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• 2024

Taraxacum coreanum, known as the native Korean white dandelion, has been historically used in traditional medicine due to its various therapeutic properties. However, the specific benefits and mechanisms of white dandelion in alleviating particular symptoms or diseases remain uncertain due to the complexity of its phytochemical profile. In this study, we aimed to elucidate the phytochemical profiles of methanolic extracts of different parts of the white dandelion (flower, leaf, stem, and root) using hybrid ion-mobility Q-TOF MS. Using the trapped ion mobility-based PASEF technique, 3715 and 2114 molecular features with MS2 fragments were obtained in positive and negative ion modes, respectively, and then a total of 360 and 156 phytochemical compounds were annotated by matching with a reference spectral library in positive and negative ion modes, respectively. Subsequent feature-based molecular networking analysis revealed the phytochemical differences across the four different parts of the white dandelion. Our findings indicated that the methanolic extracts contained various bioactive compounds, including lipids, flavonoids, phenolic acids, and sesquiterpenes. In particular, lipids such as linoleic acids, lysophosphatidylcholines, and sesquiterpenoids were predominantly present in the leaf, while flavonoid glycosides and lysophosphoethanolamines were notably enriched in the flower. An assessment of the total phenolic content (TPC) and total flavonoid content (TFC) of the methanolic extracts revealed that the majority of phytochemicals were concentrated in the flower. Interestingly, despite the root extract displaying the lowest TPC and TFC values, it exhibited the highest radical scavenging rate when normalized to TPC and TFC, suggesting a potent antioxidant effect. These findings and further investigations into the biological activities and medicinal potential of the identified compounds, particularly those exclusive to specific plant parts, may contribute to the development of novel therapeutic agents derived from white dandelion.