http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
원자흡광법에 의한 서울 지역 고수부지 토양과 잡초중의 중금속함량에 관한 연구
高聖德,辛昌男 충남대학교 자연과학연구소 1981 忠南科學硏究誌 Vol.8 No.2
Heavy metals, because of their tendency to accumulate in biological system, can pose a health hazard to human. To investigate such a heavy metal, author executed this study of the quantitative analysis of zinc, copper and lead in river bed soil along with soil depthes and plants collected from the study sites. Results obtained are summarized as follows: 1. As the pH of the river bed soi1 increased, calcium content in its soil increased. 2. The content of available phosphorus of river bed soils at the Anyang River tended to decrease from the upper stream to the lower but that of the Chungrang River was irregular trend. 3. Zinc and copper seemed to accumulate in the soil surface within the range of 0 to 2 centimeters, but lead in the soil depth within the range of 0 to 10 centimeters. 4. Heavy metal contents of river bed soils at the Anyang River were higher than those of the Chungrang River. 5. The principle purposes of the present study were to examine Zn, Cu and Pb acc-cumulations in Rumex coreanus N. and Persicaria hydropiper L. were higher than those in Humex coreanus N. Zn content in Rumex coreanus showed the largest amount in leaf but that in Persicaria hydropiper the largest amount in stem. Cu and Pb contents of both in Rumex coreanus and Persicaria hydropiper showed equally the largest amounts in root but smallest amounts in stem.
Aspergillus Phoenicis K. U. 175의 Cellulase Activity를 높이기 위한 方案
高聖德,辛昌男 충남대학교 자연과학연구소 1981 忠南科學硏究誌 Vol.8 No.2
In a previous publication the authory reported several results on the most adequate cultural condition (temperature, pH, incubation period) for the cellulase production of A. phoenicis K.U.175. This study investigated the effect of various nitrients, such as nitrogen sources and rhamnose as a sole carbon source and different amounts of pyridoxine to increase the mycelial growth and the cellulase production of the fungus in Czapek's liquid medium. The concentration of crabon to nitrogen source in Czapek's liquid medium has influenced upon the mycelial growth and the cellulase (Avicelase, CM Caso and Salicinase) production of fungus. In case that the concentration of carbon to nitrogen source in Czapek's liquid medium reached to 30:1, NH_4NO_3 exhibited the most effective source of nitrogen of growth of the fungus. In case that the concentration of carbon to nitrogen source in Czapek's liquid medium reached to 6:1, yeast extract, pepton, L-asparagine were excellent nitrogen sources for gowth of the fungus. NH_4C1 as a sole nitragon source in Czapek's liquid medium exhibited the most offective cellulase production in the ratio of ten to one of carbon and nitrogen source. 10㎍ of Pyridoxine/100ml medium exhibited the optimum concentration for the cellulase production of the fungus. The cellulase production of the fungus has reached the maximum level at the phase of logarithmic growth in 3 days after inoculation of A.phoenicis K.U.175.
김진구,고성남,김민구,심윤주 韓國非破壞檢査學會 1998 한국비파괴검사학회지 Vol.18 No.1
비파괴검사를 이해하고 습득하기 위해 필수적인 실습 위주의 교육 환경을 대체할 수 있는 수단으로 가상적인 실습 환경을 제공하는 지능형 교육 시스템을 설계하고, 이를 구현하였다. 용접부 및 다양한 제품을 검사하는데 필수적인 비파괴검사는 그 전문기술을 이해하기 위해 다양한 현장 경험을 필요로 할 뿐만 아니라, 기술지식의 지속적인 유지를 위해 반복적인 교육과 훈련을 필요로 한다. 이러한 문제를 해결하기 위해 개인용 컴퓨터를 이용하여 개별학습이 가능한 지능형 교육 시스템을 개발하였으며, 가상 실습 환경의 구축과 개별학습을 효율적으로 지원하기 위해 학습 결과를 자기진단할 수 있는 평가 시스템의 연구가 필요하다. This paper is written to introduce a multimedia tutoring system for nondestructive testing using personal computer, Nondestructive testing, one of the chief methods for inspecting welds and many other components, is very difficult for the NDT inspectors to understand its technical basis without a wide experience. And it is necessary for considerable repeated education and training for keeping their knowledge. The tutoring system that can simulate NDT works is suggested to solve the above problem based on reasonable condition. The tutoring system shows basic theories of nondestructive testing in a book-style with video images and hyper-links, and it offers practices, in which users can simulate the testing equipment. The book-style and simulation practices provide effective and individual environments for learning nondestructive testing.