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조병묵,이종만,서태수 ( Byoung Muk Cho,Jong Man Lee,Tae Soo Suh ) 한국공업화학회 1995 공업화학 Vol.6 No.3
활석분체의 품위향상 및 새로운 용도 개발을 지향한 연구의 일환으로써, 우선 활석광물의 미분쇄품을 염산수용액으로 세정하여 그 표면 및 내부에 함유된 불순물을 제거한 다음 보류향상제 또는 분산제 등으로 건식 및 습식 개질처리함으로써, 제지산업의 초조공정 중 주된 트러블 요인으로 작용하는 유기점착성 물질(피치)을 효과적으로 제어할 수 있는 새로운 피치콘트롤제의 개발에 즈음하여, 그 핵심기술이 되는 활석입자의 표면재질 관련 기초 데이터를 제공함과 아울러 표면개질 활석분체의 피치콘트롤제에의 적용성 시험결과를 검토하였다. As a part of research for rising the quality and developing the new uses of the talc powders, we developed the new preparation method of the pitch control agents controlling effectively the contents of organic-viscous materials (namely pitch) acted as a main trouble factor in the paper making process of paper industry by washing out the impurities included in the surface or inside of the fine-grinding talc powders with the aqueous solution of HCl, first and the seconds by modificating the surface of it in type of dry or wet with dispersants or retention aids. In this report, it was made an offer the basic data came to the hard core technology concerning the surface modification of the talc powders and discussed the results in the test of application to the pitch control agents of the surface-modificated talc powders.
김정일,김병권,김정원,채창호,이철호,강동묵,김지홍,김진하,김영욱,이영하,이지호,김정호,윤형렬,유철인,정백근,장태원,김운규,윤동영,강진욱,김종은,안진홍,이동준,장준호,이광영,송혜란,최영희,이용환,조병만,최홍렬,고상백,김은아,이유진,홍영습,정갑열,김정만,김준연 大韓産業醫學會 2004 대한직업환경의학회지 Vol.16 No.1
Objective: Occupational medicine specialists in the Busan, Ulsan and Kyung-Nam areas established an area-based occupational disease surveillance system and used this system to collected case information for the purpose of preventing occupational diseases Methods: l l hospital participated in this system. The authors selected five main diseases, which were hand-arm vibration syndrome (HAVS), work-related musculoskeletal disorder (WRMSD), occupational asthma, occupational skin disease and occupational and occupational lung cancer and established their case definitions. All cases were reported on the web, and real time analysis was conducted. Results: Between April 2001 and April 2003, 192 cases of HAVS, 118 cases of WRMSD, 33 cases of occupational asthma, 17 cases of occupational skin disease and 17 cases of occupational lung cancer (for a total of 377 cases of these five main diseases) were reported. most of the HAVS cases came from shipbuilding, and 172 of them (92.7%) were associated with grinding. Of the four main types of WRMSD, carpal tunnel syndrome (CTS) was the most prevalent with 46 cases and shipbuilding was also the main industry involved (83.9%). The ergonomic risk factors involved mainly associated with the hand. In 19 (57.6%) and 4 (12.1%) cases of occupational asthma, the agents involved. The causative agents of occupational lung cancer included Cr, welding fume, PAH, Ni, etc. 10(58.8%) of the cases were diagnosed as squamous cell carcinoma and 5(29.4%) as adenoma. Conclusion: This result showed that an area-based occupational disease surveillance system might provide an effective method of evaluating the prevalence of such diseases, however the Busan, Ulsan and Kyung-Nam provinces are too large to be treated as individual areas. Therefore, the authors suggest that each province should establish its own surveillance system.
이종만,조병묵 한국목재공학회 1992 목재공학 Vol.20 No.4
The unique cell wall micropores of pulp fiber can be utlized as loading site in variety of important practical application which could be the basis of new papermaking technologies, One of these includes the manufature of paper containing Niger levels of in situ filler precipitated. Hardwood pulp fiber were first impregnated with the solution of sodium carbonate(Na₂CO₃). The micrapores in cell wall of pulp fibers were filled with the liquid salt solution. The second calcium nitrate(Ca(NO₃)₂) solution formed an insoluble calcium carbonate(CaCO₃) precipitate within the cell wall micropores by interacting with the first sodium carbonate solution. The effects of chemical concentration and dryness of pulp fibers on the retention of cell wall micropore loaded filler were investigated. The paper properites of cell wall micropore loaded pulp fibers were compared with those of conventionally loaded and lumen loaded pulp fibers. Also the presense of the fillers within the cell wall micropore was observed by SEM. Incresing the chemical concentration to generate the calcium carbonate increased the retention of filler in cell wall micropore loaded pulp fibers. The particle size distribution of precipitated calcium carbonate ranged from 0.1㎛ to 80㎛. But, the average particle size of cell wall micropore loaded calcium carbonate was 4㎛. The paper made from never dried pulp fibers, the cell wall micropores which were filled with calcium carbonate, had better mechanical and optical properties than those of conventionlly loaded or lumen loaded pulp fibers.