RISS 검색 - 국내학술지논문

1
금강하류 해수중의 구리함량에 관한 연구

류공식 군산대학교 1979 論文集 Vol.1 No.1
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This paper is an attempt to survey and analyze copper contents in the sea-water of downstream of the GumRiver which empties into the Yellow sea holding contaminated water from the mining and metallic industries. To survey and analyze it, eight different areas of sea-water of the Gum River was picked up from the upper surfaces and the lower stratum at each full and ebb tides on April 20, 1978. Then careful examination in to the copper contents was made and the following results were obtained : 1. The sea-water of examining area of the downst rcam of the Gum River holds 0.048-0.141 parts per million (PPM) of copper contents, and the average is around 0.079 (PPM) 2. Copper contents at each full and ebb tides made some differences respectively. At ebb) tide copper contents (0.095) is rather heavier than that (0.063) at the full tide. It indicated that the sea-water comprised much copper contents. 3. It has been examined that the lower stratum (0.092) contains more copper contents than in the upper surface of the sea-water (0.067). 4. The result obtained after the examination by each area indicated that around Jang Hang Refinery, 1st area, the copper contents is heaviest (0.125) and the mouth of downstream of the Gum River, 3rd area, revealed the least amount (0.046) of copper contents. 5. Since the turbidity at the downstream of the Gum River is thick when seen through the naked eyes, the contamination seems to be serious, but it is thought that the pollution of the Gum River is not still sorious in terms of the quantity of copper, on of heavy metal, contained.
2
海水를 利用한 Magnesium과 Magnesia Clinker의 化學工業的展望

柳珙植群山大學校 1981 論文集 Vol.2 No.-
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Like the summary referred to about the manufacturing process of magnesium and magnesia clinker with seawater, it has turned out that seawater and dolomite are the important resources directly connected with inorganic chemical industry, and as the result, it seems that various conditions of the possibilities of development of this area also in this country has been formed. The resources spreaded throughout the country can be found here and there abundantly, and especially seawater is one of very important resources. Magnesium is very light, silver-like-color-white metal available to various industries. It's major using area is the one for making Alloy used for light construction frames. In the consideration of its hardness and lightness, in 1940, this Alloy was used for making airplanes, and also during the World War Ⅱ, the necessity of further nicer and further lighter one was solved with this Magnesium Alloy. Also Magnesium can be available widely to making incendiary(fire) bomb, flare bomb, homefurniture, fluorescent lighting, Grignard reagent, and the positive pole for preventing corruption by the other metals. Magnesia Clinker is, highly being proof against fire and highly anti-corrosive, available to basic-fire-resisting constructions in a large scale. In order to compet with others in the international market(price) with magnesium and Magnesia Clinker, by-product should be reused which is thrown away out of the process by constructing factories suitable to the international and economical unit by rationalizing material cost balance on manufactural process connected with industries concerned. It is fortunate that Magnesia Clinker is producted in the home country and supplied for the country. Yet most of it is only used for making "Cupper Furnace" but not for making basic-fire-resisting bricks at all. It is, therefore, essential that the co-operation between the Magnesia Clinker factories and fire-resisting brick factories in technics and studying should be established. Especially considering that our country is not blessed with the general natural resources and fossil fuel-oil, it is desirable to improve the national income by exporting the metal magnesium and Magnesia Clinker which we should produce using seawater which covers three sides of our country.
3
Saccharin의 展望性있는 化學的製法과 副産物의 利用에 關한 硏究

柳珙植群山大學校 1983 論文集 Vol.6 No.-
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It seems very likely that the consumption of saccharin will be increased, according to the increasing national income and the variety of processed foodstuffs, with demand of carolieless foodstuffs for the prevention of supernutrition and diseases of adult people. Therefore all the nations in the world have been concentrated on developing artificial sweetstuffs substituting sugar for. As a result of it, the manufacturing process in the past was the one which used to solve O-toluene Sulfon Amid with 30% Sodium Hydroxide; this time the method is the one which is solved with definite diluted Sodium Hydroxide. This is why we want to reduce the poionous content as possible avoiding conc Alkaline Substances. Para-toluen Sulfo Chloride produced as by-product seems likely to be used as the followings: (1) the Ester, treated and manufactured with Alkaline Alchol, can be used as Alkalifing Reagent. (2) This Chloride can be used as Chlorifying Agent of Carbon Acid in Organic Synthesis. (3) this Chloride is used for the manufacture of Dialky1 Amine. (4) this Chloride is used for the manufacture of Chiramine T, Water disinfectant and Halazone. As the above, in order to keep our good health and to save foreign currency, we should not import the whole quantity of original crude sugar, but develop this area, by-products produced in the manufacture, and poisonless Saccharin in large quantity. Thus, if we export this in large quantity, taking the exclusive property of each market in the world, it is expected that this would contribute to economic development for exporting Korea.
4
유리섬유를 적층한 에폭시 수지의 충격특성에 관한 연구

류공식,최상구,이화우 群山大學校基礎科學硏究所 1993 基礎科學硏究 Vol.8 No.-
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에폭시 수지의 경화제와 경화조건을 변화시켜가며 유리섬유/에폭시 적층판의 충격특성을 연구하였다. 상온경화에서는 분자사슬이 긴 폴리아미드(G-1034)를 경화제로 사용했을 때 가장 큰 충격강도를 나타내었다. 가열경화에서는 파괴개시에너지가 상온경화에 비하여 높게 나타났으며, 후경화에서는 파괴 전파에너지가 높게 나타났다. 저온시험에서는 모재로부터 섬유의 이탈이 많이 일어난 것이 높은 충격 강도를 나타내었다. The influence of hardener and curing condition were studied on the impact properties of epoxy resin laminated with glass- fiber experimentally. Generally, the initiation energy of the epoxy composites was increased with heat - cure, and the propagation energy was also increased with post-cure. The total impact strength of composites cured with hardener of polyamide type was than that of aliphatic or aromatic amine type. The impact strength was increased with enhancement of propagation energy when it was tested at low temperature.

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