• Food Science and Preservation
• /
• v.17 no.4
• /
• pp.541-546
• /
• 2010

Wild-garlic (Allium victorialis L.) is a perennial plant found in worldwide and has been considered as a favorite vegetable due to its particular smell and taste. However, the study of biological activity of wild-garlic and the development of processed food are in rudimentary. In this study, we evaluated several biological activities, including antioxidant, antimicrobial, and inhibitory activities against human thrombin, $\alpha$-amylase and $\alpha$-glucosidase, of Ulrung wild-garlic. Analysis of the composition showed that Ulrung wild-garlic is nutritive although it is perishable. The color of fresh juice was stably maintained during 10 days-storage at $4^{\circ}C$, but rapidly discolored by heat treatment at $70^{\circ}C$ for 1 h. During heat treatment, the contents of total sugar and total polyphenol were decreased to 75% and 50%, respectively, and acidity was increased from 0.069% to 0.111%. In a while, the brix, reducing sugar, and total flavonoids showed minor changes. The fresh juice showed strong DPPH scavenging activity, reducing power and antibacterial and antifungal activity, but the heat-treated juice lost the antioxidant and antimicrobial activities. The inhibitory activities against human thrombin and $\alpha$-amylase and $\alpha$-glucosidase was negligible in both fresh juice and heat-treated juice. These results suggested that the antioxidant and antimicrobial components in wild-garlic are heat-liable and volatile. Based on our results, we propose non-heat treatment products for processed wild-garlic, for example, fresh juice-added beverage or fermented liquors using wild-garlic.

• Korean Journal of Medicinal Crop Science
• /
• v.12 no.6
• /
• pp.463-472
• /
• 2004

This study was carried out to investigate the chemical composition of essential oils, absolutes and oleoresins isolated from Elsholtzia ciliata and the biological activities of them. Yields of essential oils, absolutes and oleoresins were 0.34%, 11.33% and 15.24%, respectively. The major component was naginate ketone in essential oils, methyl linolenate in absolutes and 9,12,15-octadecatrienoic acid in oleoresins. Eseential oils and oleoresins showed the inhibitory activities in enzyme-dependent, enzyme-independent and autooxidatve lipid peroxidation systems. $EC_{50}$ values in neutral red uptake assays 24 h of exposure times were $23.3\;{\mu}g/m{\ell}$, $341.0\;{\mu}g/m{\ell}$ and $17.2\;{\mu}g/m{\ell}$ in essential oils, absolutes and oleoresins, respectively, and essential oils and oleoresins showed the cytotoxic effect at the only high dose. Absolutes and oleoresins did not show antibiotic and mutagenic activities. On the contrary, essential oils with over $500\;{\mu}g/plate$ showed antibiotic and mutagenic activities in Ames test. Essential oils and oleoresins have a prolongating effect the ciliostasis of rat trachea.

• Korean Journal of Organic Agriculture
• /
• v.24 no.4
• /
• pp.893-905
• /
• 2016

Puff processing is one of the preparation and processing methods of herbal medicines. This study analyzed the quality characteristics in schisandra chinensis extracts by puff processing ($1kgf/cm^2$, $3kgf/cm^2$, $5kgf/cm^2$) through changes of the lignan contents and antioxidant activity. The lignan contents and antioxidant activity of puff processing schisandra chinensis extracts (PPSCE) increased higher than compared to a control. Also, as lignan contents and antioxidant activity of PPSCE was increased with the increasing pressure but it was reduced from $5kgf/cm^2$. The results suggest that puff processing was attributed to the quality increase schisandra chinensis.

• Korean Journal of Plant Resources
• /
• v.23 no.5
• /
• pp.451-457
• /
• 2010

In order to elucidate the antioxidant potential of non-edible parts of oriental melon, antioxidant activities and total phenolic compound contents of six samples including peel, placenta, stem leaf, flesh and seed were determined. Antioxidant activities were evaluated using in vitro DPPH, ABTS, FRAP, and SOD assay. Among non-edible parts of oriental melon, stalk showed the highest antioxidant activity and its antioxidant potential increased significantly in a dose-dependent manner. The contents of total phenolic compound were also higher than other parts. The relationship between antioxidant activities and the contents of total phenolic compound were analyzed and showed higher correlation coefficients between ABTS radical scavenging activity and contents of total phenolic compound. The above results suggest that the stalk of oriental melon may have potential as a good source for functional material.

• Proceedings of the Korean Society of Tobacco Science Conference
• /
• 2003.05a
• /
• pp.41-42
• /
• 2003

• Proceedings of the Ginseng society Conference
• /
• 2003.12a
• /
• pp.24-24
• /
• 2003

• Proceedings of the Plant Resources Society of Korea Conference
• /
• 2007.11a
• /
• pp.335.2-335.2
• /
• 2007

• Proceedings of the Korean Society of Food Science and Nutrition Conference
• /
• 2002.06a
• /
• pp.3-5
• /
• 2002

• Proceedings of the Plant Resources Society of Korea Conference
• /
• 2018.04a
• /
• pp.98-98
• /
• 2018

Glycyrrhizin은 감초의 주성분으로 많은 생리활성을 나타내는 성분이다. 감초를 복용하게 되면, 글리시리진은 장내에 서식하고 있는 장내세균에 의해 glycyrrhetic acid로 대사된다. 하지만, 지금까지 대사반응에 관여하고 있는 균주가 분리 후 자원화되지 않았다. 본 연구를 통해 사람의 대변으로부터 glycyrrhizin을 대사하는 균주로 분리된 strain GLY의 16S rRNA 유전자를 분석한 결과, Enterococcus faecium과 99%의 상동성을 보여, Enterococcus faecium GLY (Genebank No. MH048988)로 명명하였다. 대사활성의 특성을 검토하기 위하여 time course, 기질의 농도에 따른 대사활성의 변화, 근연 균주와 대사활성 비교를 실시하였다. Time course 실험에서 GLY균주가 증식함에 따라 기질인 glycyrrhizin은 줄어들고, 대사산물인 glycyrrhetic acid는 새로 생성되었다. 또한, 기질의 농도에 따른 대사활성의 차이 검토를 위해 여러 농도를 처리하여 배양하였을 때, 1.0mM을 처리한 샘플에서 최대값의 대사물 농도를 보였다. Enterococcus faecium와의 근연균주를 이용하여 glycyrrhizin 대사활성을 측정한 결과, strain GLY 균주가 가장 큰 대사능을 가지고 있었다. 본 연구는 앞으로 glycyrrhizin 생체이용 및 대사 연구를 위한 기초연구가 될 것이며, 장내세균에 의한 생약성분의 대사를 이해하는데 도움이 될 수 있다.

• Proceedings of the Korean Society of Crop Science Conference
• /
• 2019.09a
• /
• pp.39-39
• /
• 2019