에탄올 함량변화에 따른 유백피 추출물의 항산화 활성

김동선,임선미,성윤영,천진미,김호경 한국한의학연구원 2012 한국한의학연구원논문집 Vol.18 No.3

Objectives : This study was performed to find best extraction solvent for application of Ulmi cortex to food or herbal medicine as an antioxidant only using water, ethanol and their mixtures. Methods : The Ulmi cortex extracts were prepared using water and 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100% (v/v) ethanol, and were evaluated yields, total polyphenol contents, DPPH and ABTS radical scavenging activities, lipid peroxidation activities, and catechin and epicatechin contents. Results : Among the Ulmi cortex extracts, the yield was highest in water extract (8.9%) and lowest in ethanol extract (3.8%). The yield of 30% ethanol extract (8.5%) also was very high to similar with water extract. The total polyphenol content was highest in the 30% ethanol extract (253.6 μg /mg extract) and lowest in water extract (109.0 μg /mg extract). The DPPH radical scavenging activity was highest in ethanol extract (IC50, 8.53 μg/ml), ABTS radical scavenging activity was highest in 60% ethanol extract (IC50, 3.08 μg/ml), and the inhibition of lipid peroxidation was highest in 70% ethanol extract (IC50, 7.96 μg/ml). As ethanol content of extraction solvent increased from 0% to 30%, the antioxidant activities were remarkably increased whereas from 30% to 100%, the antioxidant activities were increased or decreased a little. Conclusions : The findings of the present study suggest that 30% ethanol is best solvent for extraction of Ulmi cortex, considering yield, polyphenol content, and antioxidant activities with extraction cost. Objectives : This study was performed to find best extraction solvent for application of Ulmi cortex to food or herbal medicine as an antioxidant only using water, ethanol and their mixtures. Methods : The Ulmi cortex extracts were prepared using water and 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100% (v/v) ethanol, and were evaluated yields, total polyphenol contents, DPPH and ABTS radical scavenging activities, lipid peroxidation activities, and catechin and epicatechin contents. Results : Among the Ulmi cortex extracts, the yield was highest in water extract (8.9%) and lowest in ethanol extract (3.8%). The yield of 30% ethanol extract (8.5%) also was very high to similar with water extract. The total polyphenol content was highest in the 30% ethanol extract (253.6 μg /mg extract) and lowest in water extract (109.0 μg /mg extract). The DPPH radical scavenging activity was highest in ethanol extract (IC50, 8.53 μg/ml), ABTS radical scavenging activity was highest in 60% ethanol extract (IC50, 3.08 μg/ml), and the inhibition of lipid peroxidation was highest in 70% ethanol extract (IC50, 7.96 μg/ml). As ethanol content of extraction solvent increased from 0% to 30%, the antioxidant activities were remarkably increased whereas from 30% to 100%, the antioxidant activities were increased or decreased a little. Conclusions : The findings of the present study suggest that 30% ethanol is best solvent for extraction of Ulmi cortex, considering yield, polyphenol content, and antioxidant activities with extraction cost.

미래 성장동력 창출 및 고부가화를 위한 약용작물 산업화

김동선 한국약용작물학회 2022 한국약용작물학회 학술대회논문집 Vol.2022 No.1

에너지 원제재를 이용한 환경농법 오이재배

김동선 慶北大學校 農業開發大學院 2001 最高農業經營者課程 論文集 Vol.7 No.-

플라즈마 화학 증착법에 의해 증착된 비정질 질화 탄화물의 특성들에 대한 이온 에너지 플럭스의 영향

김동선 公州大學校工科大學生産技術硏究所 1997 論文集 Vol.5 No.-

높게 수소로 희석된 테트라메틸실레인(TMS)을 사용하여 비정질 수소화 된 질화 탄화물을 증착하기 위해서 상온에서 이온 에너지 및 플럭스를 변화시키면서 13.56 MHz rf 전력과 비대칭 전극을 갖는 플라즈마 반응기를 사용하였다. 이온 에너지 및 플럭스는 임피던스 분석에 의하여 측정되어진다. 높은 이온 에너지 플럭스하에서 증착된 a-SiC:H 박막은 가시광선 및 자외선 영역에서 투과성, 중화된 HF용액 속에서 내식성과 실리콘웨이퍼, 석영, 알루미늄 및 폴리 카본네이트와 폴리이마이드와 같은 고분자에 우수한 접착력을 갖는다는 면에서 고온에서 증착된 질화 탄화물과 비교 할만하다. FTIR분석에 의하면 이온 에너지에 따라 여러 가지 결합 구조를 갖는 박막이 얻어짐을 보여준다. 즉 이온 에너지 플럭스가 증가함에 따라, 박막 속의 수소 함량은 감소하고, 고분자화(cross-linking)되어지는 정도가 증가함을 보여준다. Tetramethyl silane diluted highly with hydrogen(10% TMS in H₂by volume) is used for depositing a-SiC:H thin films at room temperature under varying degrees of ion energy and ion flux in a 13.56 MHz powered, asymmetric plasma reactor. The apparent ion energy and flux is determined by an impedance analysis. When the apparent ion energy flux is increased, the a-SiC:H films becomes denser, lower in hydrogen content, more crosslinked, and more transparent in UV/VIS region. Also, greater compressive stress is developed in these films. The films exhibited excellent chemical resistance and strong adhesion on various substrates such as silicon, quartz, glass, polycarbonate, and polyimide. The refractive indices of these films are suitable for antireflective coating on infrared optical materials.

남극 브랜스필드 해협에서 입자 플럭스 계절변화

김동선,김동엽,강영철,김영준 한국해양과학기술원 2002 Ocean and Polar Research Vol.24 No.2

Particle fluxes were measured by using time-series sediment traps in the Bransfield Strait from December 27th, 1999 to December 26th, 2000. Total mass fluxes showed distinct seasonal variations with high fluxes in the austral summer and low fluxes in the austral winter at a 678 m water depth in the eastern Bransfield Strait, while they were high only in January and fairly low in other months at a 960 m water depth in the central Bransfield Strait. The reason that total mass fluxes occurred only in January at a 960 m water depth in the central Bransfield Strait seems to be the strong current in the surface waters, which leads to a substantial amount of terrestrial materials and locally produced organic matter being advected away from the mooring site. Total mass fluxes were very high from January to October at a 1678 m water depth in the eastern Bransfield Strait, while they were high only in January and February at a 1860 m water depth in the central Bransfield Strait. The fact that total mass fluxes were higher at the deep water in the both sites than at the intermediate water depth may reflect that a substantial amount of terrestrial and organic materials are laterally transported by strong tidal current from the shallow environments to the deep basins.

한국 남동 연안역의 용승현상에 관한 수치실험

김동선,김대현,Kim, Dong-Sun,Kim, Dae-Hyun 해양환경안전학회 2008 해양환경안전학회지 Vol.14 No.1

1999년 6월 한국 남동 연안역의 울산과 감포 앞바다에 출현한 용승에 의한 냉수출현현상을 3차원 진단 수치모델을 이용하여 조사하였다. 수치실험에 의한 냉수출현은 바람 영향으로 인하여 울산-감포 앞바다의 수심 50-100m 층에서 발생한 상승류의 효과로 나타났다. 이러한 용승현상은 인접한 부산, 울산 및 감포에서 관측한 바람의 2배인 5.0/m/sec 크기의 바람을 모델에 적용했을 때 발생했다. 따라서 용승현상과 같은 특이한 해양현상을 규명하기 위해서는 육지에서 관측한 자료가 아닌 그 해역에 적절한 바람자료를 이용해야 한다. To investigate the appearance of cold water by upwelling effect near Ulsan-Gampo of the southeastern coast in Korea on June, 1999, we carried out a numerical experiment by 3-dimensional diagnostic numerical model. Appearance of cold water by the result of numerical experiment was due to upwelling by wind effect at 50-100m depth near Ulsan-Gampo coast. This result was mused by using a model to 2 times of existing wind magnitude near Busan, Ulsan and Gampo that is 5.0m/sec wind. Therefore, to illustrate the phenomenon of extraordinary marine environment like upwelling event and so forth, appropriate wind data at sea should be used instead of those on land.

지역사회 요구에 부합되는 사회봉사 프로그램 개발을 바라며

김동선,Kim, Dong-Seon 한국대학교육협의회 2002 大學敎育 Vol.119 No.-

The changes in marine environment and biological community in sea areas around an artificial upwelling structure during the summer

김동선,김무찬 한국통합생물학회 2013 Animal cells and systems Vol.17 No.5

In order to examine the changes in a biological community in the South Sea of Korea that is caused by the installation of an artificial upwelling structure during the summer season when the forming of the stratification is the strongest, the researchers evaluate the water’s temperature and nutrients, the standing crops and species diversity of phytoplankton and zooplankton, and the benthic organisms. The forming depth of Maximum Thermocline of Water Column (MTWC) is elevated after installing an artificial upwelling structure. Also, instead of showing a clear stratification where the concentration of nutrients increases as the depth of the sea increases, the distribution of nutrients after installing an artificial upwelling structure has changed, showing a lower degree of stratification by causing the mixing of the water mass. Compared to 2005, when the artificial upwelling structure was first introduced, the standing crop of phytoplankton and zooplankton has increased by 58.2 and 30.0 times in 2008, thus showing a tendency to increase as the size of the artificial upwelling structure becomes bigger. Also, the species diversity index of phytoplankton and zooplankton has increased and the size of the artificial upwelling structure has become greater. When the environment underwater around the artificial upwelling structure was examined in 2008, the underwater environment, arthropods such as Balanus albicostatus, mollusks such as Patinopecten yessoensis and Batillus cornutus, echinoderms such as Asterina pectinifera and Comanthus japonica, chordates such as Halocynthia roretzi, and fishes such as Sebastes inermis and Oplegnathus fasciatus were found, thus forming a benthic environment.

Max Frisch 의 笑劇「Die Chinesische Mauer」에 나타난 知性人像(2)

金東善 건국대학교 부설 중원인문연구소 1985 論文集 Vol.4 No.-

Zum ersten Mal in der Geschichte der Menschheit stehen wir vor der Wahl, ob es die Menschheit geben soll oder nicht. Die Sintflut ist herstellbar. Duch die Atombombe stellt sich zunachst das politische Problem, wie ihr Miβbrauch, d.h. ihre Anwendung, und vor allem, daβ ein Despot, ein Tyrann, ein Diktator Verfugungsgewalt uber sie erhalt, verhindert werden kann. Bei der immer weiteren Verbreitung von Kernwaffen bedeutet es, daβ die volker verhindern muβten, daβ Manner dieses Typs an ihre Spitze kommen oder dort sind. Wie aber ist daβ, wie ist es uberhaupt heute moglich, die richtige Vernunftseinsicht der geschichtlichen Notwendigkeiten in den politischen Realitaten zur Geltung zu bringen? Diese Frage beschaftigt Max FRisch in seiner Farce 「Die Chinesische Mauer」. Dabei handelt es sich vornehmlich um die Frage, wie Rolle des Intellektuellen in einer durch den Atomtod bedrohten, aber nach wie vor gemaβ dem Prinzip des Willens zur Macht regierten Welt zu bestimmen sei und wie man den Widerspruch zwischen Herrschaft und Leiden, macht und Wahrheit, Gewalt des einzelnen und Recht des voldes auf die Buhne bringen konne. Dieses Stuck zeigt uns keine ermutigenden Perspektiven. Der Heutige, der die Wahrheit erkennt und sie in den Wirklichheiten eine Rolle zu spielen machen will, verkorpert nur die Ohnmacht des Intellektuellen. Aber dadurch, daβ der Dichter den Intellektuellen fur uns ohnmachtig darstellt, durfte er es hoffen, daβ die Gesellschaft, die den Geist nicht zum Auβenseiter macht, nicht zum Martyrer und nicht zum Hofnarren, verwirklicht wird.

無限權力者의 人間像 考察 : 萬里長城의 秦始皇帝를 중심으로

金東善 건국대학교 부설 중원인문연구소 1988 論文集 Vol.7 No.-

Die vorliengende Arbeit zielt auf das Menschenbild von dem Kaiser Tsin Sche Hwang Ti zu analysieren, der in Frischs ?? [Die Chinesische Mauer]als typischer Diktator auftritt. Hierzu wird es auch betrachter, welche Bedeutung er heutzutage ?? die Menschenhat. In diesem Zusammenhang sei es erst betrachtens wert, wie anders das Heute yon dem Gestern ist. Die Gegenwart ?? die naturwissenschaftlich-technisch bedignten ??, die Welt zu zerstoren, Die Sintflut ist herstellbar. " Die Vergangenheit kann als Zeiten der autokratisch diktatorischem volksfeindich-imperialistischen Prinzipien der ?? definier werden, Daβ sich angesichts der ?? Technik die Herrschaftsformen ???? wenn die Menschheit am Leben bleiben soll, dies ist es, was das Stuck vorfuhren will. In dieser Hinsicht kommt der Tyrann in Frage. Hwang Ti ist das Inbild einess grausamen und brutalen Despot. Hinter seinem unscheinbaren Auβeren verbirgt sich sein intolerantes, rohes und machtgieriges Wesen, Mit einem Wort ist er Unmensch. Die wesentliche Unmenschlichkeit von ihm besteht doch , daβ der Unmensch das Volk unmenschlich macht, dadurch daβ er die Menschen entwurdigt. Er trittmit dem Anspruch der Unfehlbarkeit auf,, Er gibt sich als der Erste Erhabene Kaiser, als der Himmelssohn aus, der immer in Recht. In Wirklichkeit ist er aber umgekehrt Antichrist, Und er ist Diktater, der durch einseitige Ideologie, Nachrichtkontrolle, Waffenmonopol und terroristische Polizeigewalt sein Volk schrecklich unterdruckt. Also bei der imer weitern Verbreitung von Kernwaffen bedeuted es, daβ die ?? verhindern muβten, daβ ?? dieses Typs an ihre Spitze kommen oder dort sind. Doch bis heute erscheinen ohne Unterlaβ die Lemuren des Geschichte. Hieraus erweist sich unsere Gesellschaft als noch nicht rief, die Aufgabe der Selbsterhaltung durch Demokratisierung und Humanisierung der Herrschaftsverhaltnisse zu ??.