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초생추에 있어서 6가 Chromium 의 독성과 Copper 및 Zinc 와의 상호작용
정근희,강면희,한인규,김춘수 ( Keun H . Chung,Myun H . Kang,In K . Han,Chun S . Kim ) 한국축산학회 1983 한국축산학회지 Vol.25 No.6
In order to study the toxic level of dietary hexavalent chromium and its interaction with copper and zinc on the growth, mortality and accumulation of chromium in organs, an experiment was conducted with 720 chicks (Hisex White) for a period of 8 weeks. Four levels of hexavatent chrominm (O0ppm, 200ppm, 400ppm, and 600ppm) were added in the absence or presence of copper 1000ppm or zinc 400ppm. The results obtained from the experiment are summarized as follows: 1. Growing chicks(0-8wk) fed 200ppm of hexavalent chromium showed no adverse effects on the growth rate and mortality, but those fed 400ppm to 600ppm of hexavalent chromium exhibited remarkable growth depression and increased mortality(p$lt;0.05). 2. Dietary copper and zinc partially reduced the toxicity of hexavalent chromium, but the modes and degrees were not consistent with the various dietary chromium levels. 3. Chromium accumulation in the internal organs of the growing chicks was slightly increased as the dietary hexavalent chromium level was increased from 200 to 600ppm. And it was found that hexavalent chromium accumulation in the internal organs was partially reduced by dietary copper and zinc supplementation.
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정근희,전우민,이상업,김영교,박동준 ( Keun H . Chung,Woo M . Jeon,Sang U . Lee,Young K . Kim,Dong J . Park ) 한국축산학회 1989 한국축산학회지 Vol.31 No.10
In order to study the level of the selected elements(Ca, Zn and Cd, etc.) in milk and their interrelationships with milk protein, raw milk samples in the vicinity of Seoul and market milk samples were collected in the summer, winter and early spring. The average Ca and Zn content of milk from different areas and different products varied between 0.06∼0.13% and 2∼5ppm, respectively, and the Cu content is below 0.lppm. Cd(regarded as a toxic element) content in milk is not detected and the Hg content is below the detection limit of AAS instrument in the milk produced in Korea. The interrelationship of these elements with milk components(specially with casein) is also studied. Generally, inorganic elements(Ca, Mg and Zn) are contained in the portion of casein and whey. The fraction of α_s -casein contains higher Ca amounts than that of β- or k-casein does, but we have not found out that these elements are combined with milk component or not.
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병아리에 있어서 크롬의 독성과 망간 및 몰리브덴과의 상호작용
정근희,석윤오,강면희 ( K . H . Chung Y . O . Suk,M . H . Kang ) 한국축산학회 1985 한국축산학회지 Vol.27 No.6
In order to study the toxic level of dietary chromium and its interaction with other trace elements such as manganese and molybdenum on the growth, mortality and chromium accumulation in the internal organs, two experiments were conducted with day old chicks for a total period of 4 weeks. The body weight gain and mortality of the growing chicks were measured by two experiments. In the first experiment, the liver, kidney and pancreas were analyzed to determine chromium retention.. Growing chicks (0-2 wks), fed 1200 ppm and 1500 ppm of hexavalent chromium, exhibited considerable growth depression and mortality. Chicks (0-2 wks) fed 4000 ppm of trivalent chromium showed adverse effects on growth rate, but suffered no mortality. There was antagonistic interaction between hexavalent chromium and manganese and hexavalent chromium and molybdenum; however the mode and degree did not correspond to dietary chromium levels. Antagonistic interaction between trivalent chromium and managanese did not appear. Also, hexavalent chromium accumulation in the internal organs was slightly reduced by dietary manganese and molybdenum supple
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Fabrication and Characteristics of Co-Pt Nano-Sized Dot Arrays
정근희,Jung-Kab Park,이창형,이두현,서수정 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.4
Co-Pt alloy lms fabricated by DC magnetron sputtering exhibited high perpendicular magnetic anisotropy and a high coercivity of up to 2690 Oe. The Co-Pt nano-sized dot arrays were patterned by using electron beam lithography and ion beam etching processes. The patterning sizes of the dot arrays were 50 nm, 100 nm, 200 nm and 400 nm. The magnetic properties of these arrays were examined by a vibrating sample magnetometer (VSM), a torque magnetometer and a magnetic force microscope (MFM). The dot arrays with diameters of 100 nm and 200 nm showed a single domain structure with perpendicular anisotropy. The direction of the magnetization was the in-plane direction and a multi-domain structure appeared when the dot size was >200 nm.
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鄭根姬 한국중국문화학회 2000 中國學論叢 Vol.9 No.-
本文主旨在于探討梁代宮□詩人蕭綱詩的形成背景. 主要論述齊梁宮□詩的政治 ? 社會和文學背景以及詩人在此發展中的作用. 宮□詩在齊梁文學史上具有代表性, 後成爲唐代近□詩發展的基礎. 梁代有了自我意識的覺醒, 對美的新追求, 玄學的興趣, 經過新變的文學發展, 南朝民歌的盛行, 帝王中心的文學交遊, 都使得文學得以繁榮, 其中帝王的影響起着巨大的作用. 蕭綱是第二代蕭氏王朝的統治者. 在梁代的文學環境中, 澤受了尊師徐□的影響而後確立了他的文學觀. 以蕭綱爲首的東宮中心文學集團推動了宮□詩的發展. 宮□詩吸取六朝各詩派之藝術技巧, 故得以躍爲梁詩壇之主流. 宮□詩具有自己的特殊風格, 特有的文學價値和意義.
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초생추에 있어서 3가 Chromium 의 독성과 Cobalt 및 Zinc 와의 상호작용
정근희,강면희,김춘수,한인규,이경노 ( Keun H . Chung,Myun H . Kang,Chun S . Kim,In K . Han,Kyung N . Lee ) 한국축산학회 1983 한국축산학회지 Vol.25 No.6
In order to study the toxic level of dietary trivalent chromium and its interaction with cobalt and zinc on the growth, mortality, and accumulation of chromium in organs of chicks, an experiment was conducted with 720 chicks(Hanhyub 603) for a period of S weeks. Lour levels of trivalent chromium(0ppm, 500ppm, 1,500ppm and 2,500ppm) were added in the absence or presence of cobalt 150ppm or zinc 600ppm. The results obtained from the experiment are summarized as follows: 1. Growing chicks(0-5wk) fed 500ppm of trivalent chromium showed no adverse effects on the growth rate and mortality, but those fed 1,500ppm to 2,500ppm of trivalent exhibited considerable growth depression(p$lt;0.05) without mortality. 2. Dietary cobalt and zinc did not reduced the toxicity of trivalent chromium. 3. Chromium accumulation into internal organs was slightly increased as the dietary trivalent chromium level was increased from 500 to 2,500ppm, but the degree and mode of the accumulation was different depending upon the internal organ. And adding cobalt and zinc failed to reduce the chromium accumulation.
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鄭根姬 한국중국문화학회 1999 中國學論叢 Vol.8 No.-
本論文的硏究目的主要是在探索蕭綱樂府詩的文學特質, 題材與表現技巧, 進而評定蕭綱樂府詩在文學史上的美學價値. 本論文以梁代宮體詩人蕭綱的樂府詩八十七首爲硏究對象. 在二百八十五首蕭綱宮體詩中, 樂府詩一介흔重要的體裁. 主旨在于是論述蕭綱樂府詩的題材, 形式以及表現上的特徵. 蕭綱樂府詩題材是艶情o日常o邊塞o詠物o遊仙, 其中艶情詩最多. 艶情詩的所謂情, 主要詩女性的心理活動. 詩題大部分是曲o行o篇o歌, 詩形最多占有五言八句, 五言四句. 樂府詩里用華麗的文辭, 出現多種的女性形象, 知道了當時女性的生活環境.
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