• Journal of Applied Biological Chemistry
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• v.63 no.3
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• pp.259-265
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• 2020

Antioxidative activities of 50% ethanolic extracts from Du-zhong (Eucommia ulmoides Oliver) leaf and bark were investigated. Yields of the leaf and bark extract were 8.1±0.31 and 17.4±0.89%, respectively. Polyphenol contents of the leaf and bark extract were 64.1±3.35 and 42.4±2.38 ㎍ gallic acid equivalents/mg, respectively. Flavonoid contents of the leaf and bark extract were 24.0±3.15 and 36.7±3.18 ㎍ quercetin equivalents/mg, respectively. As concentration of the leaf and bark extract increased, their antioxidative activities proportionally increased. EC₅₀ values of the leaf and bark extract for cation radical scavenging were 560.6±17.65 and 1,357.4±8.45 ㎍/mL, respectively. EC₅₀ values of the leaf and bark extract for free radical scavenging were 574.2±14.70 and 2,103.1±108.59 ㎍/mL, respectively. EC₅₀ values of the leaf and bark extract for ferric reducing antioxidant power were 319.9±13.42 and 705.9±26.08 ㎍/mL, respectively. EC₅₀ values of the leaf and bark extract for nitrite scavenging were 2,329.2±35.11 and 5,467.6±243.92 ㎍/mL, respectively. In the presence of 74.8 ㎍/mL of the leaf extract and 177.2 ㎍/mL of the bark extract, linoleic acid peroxidation was inhibited by 70.0 and 79.1%, respectively. The Du-zhong leaf extract possessed higher antioxidative activities than its bark extract.

• The Korea Genome Conference
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• 2006.09a
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• pp.40-40
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• 2006

• Proceedings of the Korea Water Resources Association Conference
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• 2005.09b
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• pp.1445-1446
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• 2005

• 대한생식의학회:학술대회논문집
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• 2004.11a
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• pp.28-29
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• 2004

• 대학교육
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• s.134
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• pp.32-37
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• 2005

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2005.11b
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• pp.316-328
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• 2005

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 1997.04a
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• pp.41-51
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• 1997

• Korean Journal of Plant Resources
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• v.9 no.2
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• pp.183-188
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• 1996

Chinese crude drug 'Se Sin'(細辛)has been used to cure headache, cough and expectorant. To the botanical origin of 'Se Sin', Zhong-yao-zhi(中葯志) reported Asarum heterotropoides var. mandshuricum. A. sieboldii and A. sieboldii var. seoulensis, and Zhong-yao-da-ci-dian(中葯大辭典) reported Asarum heterotropoides var. mandshuricum and A. sieboldii of Aristolochiaceae. In Korea, this crude drug has been used as a Korean folk remedy for tothache and aromatic. The botanical origin of 'Se Sin' is considered to be Asarum species of Aristolochoaceae. But there has no pharmacognostical confirmation on it. To clarify the botanical origin of 'Se Sin', we studied on the anatomical characteristics of Asarum species growing wildly in Korea i.e. A. maculatum, A. sieboldii, A. sieboldii var. seoulensis, and of 'Se Sin' from Korea on Korean market. Through our studies, the botanical origin of 'Se Sin' from Korea was proved to be whole plant of Asarum sieboldii and A. sieboldii var. seoulensis.

• Geomechanics and Engineering
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• v.6 no.5
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• pp.455-467
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• 2014

As the traffic increased, the original capacity of the tunnel has been unable to meet the needs, so it must be expanded. Based on the features of tunnel, the intermittent trough method must be supposed for tunnel enlarging. Under the situation on the buried deep of the tunnel, it could be used the reasonable arch axis model to descript the past covered rock pressure for mechanism calculating of self-bearing arch. Then establish the three-arch combination effectible model for the analysis which is relied on the tunneling enlarging to Chongqing Yu-Zhou tunnel. It has determined the proper width for the intermittent trough in shallow buried tunnel enlarging.

• Journal of Haehwa Medicine
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• v.12 no.2
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• pp.41-61
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• 2004

Jinguiyaolue, written by Zhong-Jing Zhang(張仲景) in East-Han Dynasty of China, is believed to be the professional book about divers diseases of Korean Medicine(韓醫學). As based its theoretical framework upon Nei-Jing(內經) and Nan-Jing(難經), Jinguiyaolue(金匱要略) not only suggests the basic theory about the cause of disease, mechanism of disease(病機), diagnosis and treatment and prevent of divers disease but also constructs foundation for the clinical medicine. Thus, it can be said that Jinguiyaolue(金匱要略), along with Shang-Han-Lun(像寒論) by Zhong-Jing Zhang(張仲景), will be quite worthy in that the book deals with the fundamental theory of Korean Medicine(韓醫學).