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低溫플라즈마를 이용한 poly(ethylene terephthalate)섬유에의 아크릴산의 그라프트 중합
陸鍾一,李在寧,牟相榮 忠南大學校 産業技術硏究所 1986 산업기술연구논문집 Vol.1 No.2
Graft copolymerisation of acrylic acid on the surface of poly(ethylene terepthlate) (PET)fiber was investigated using low temperature plasma treatment. Argon plasma was used as an initiator on PET fiber and followed post copolymerisation by inducing acrylic acid vapor under required conditions. The morphological changes of grafted PET film surface was evaluated by SEM and roughness tester, and grafted feature, grafting yield were evaluated by SEM and FT-NMR respectively. The result obtained are as follows: 1) The surface of PET fiber being etched and activated by plasma treatment. 2) On the roughness of plasma grafted PET film, it can be seen that the longer the plasma treatment time, the lower the height of wave and the spreader the wave width. 3) It can be detected the poly(acrylic acid) grafted on PET fiber by H¹-NMR.
陸鍾一 건국대학교 1979 論文集 Vol.10 No.1
In this experiment E-glass fiber was used as a specimen material to transfer higher SiO2 content and promote physical properties by acid teaching. The change of SiO2 content and melting point of the fiber were plotted with variable condition such as acid concentration, leaching time and temperature. The results obtained by-the study are as follows. 1) E-glass fiber was the best material for high glass forming, and on acid treatment, 4 NHCI was most suitable. 2) The temperature condition could vary the SiO2 content of the fiber, but it was befit to keep the temperature between 95℃ and 100℃ 3) Melting point of the high glass was almost proportional to the SiO2 content with its purity. 4) Heat treatment had no effect on the SiO2 content.
Fiber-Glass Reinforced Plastics의 인장, 압축, 굴곡강도에 관한 연구
陸鍾一 건국대학교 1980 論文集 Vol.11 No.1
The experimental results of tensile Compressive and flexural tests of glass-phenolic Binary Compound Specimens obtained by Compress Molding process are as follow. (1) Glass-phenolic was the test Material for Ablation plastics forming. (2) The tensile, compressive and flexural strength of specimens made up with ½"×½" chopped Compounds are approximately equal to those of "Proczynski's" thory. practically, specimens made up with glass fiber chopped compound showed bettor values than any others fiber chopped Compound. (3) The tensile, compressive and flexural strength increase proportionally as the molding pressure increase.
Dong Hoon Shin,Sang-Yuck Shim,Myeung Ju Kim,Chang Seok Oh,Mi-Hyun Lee,Suk Bae Jung,Geon Il Lee,Jong-Yil Chai,Min Seo 대한기생충학열대의학회 2014 The Korean Journal of Parasitology Vol.52 No.5
In a paleo-parasitological analysis of soil samples obtained from V-shaped pits dating to the ancient Baekje period in Korean history, we discovered Ascaris lumbricoides, Trichuris trichiura, and Clonorchis sinensis eggs. In light of the samples’ seriously contaminated state, the V-shaped pits might have served as toilets, cesspits, or dung heaps. For a long period of time, researchers scouring archaeological sites in Korea have had difficulties locating such structures. In this context then, the present report is unique because similar kind of the ancient ruins must become an ideal resource for successful sampling in our forthcoming paleoparasitological studies.