Virus 에 감염된 대추나무의 이병엽과 (罹炳葉) 건전엽에 (健全葉) 있어서의 유리 (遊離) amino 산의 정성적 비교

홍순우(Soon Woo Hong),하영칠(Yung Chil Hah) 한국식물학회 1961 Journal of Plant Biology Vol.4 No.1

Hong, Soon-Wooe and Yung-Chil, Hah (Dept. of Botany, Seoul National University, Seoul, Kerea.) A compantive investigation of free amino acids in healthy and virus diseased Chinese date tree. Kor. Jour. Bot. 4 (1)9~12 1961 : A comparative investigation of free amino acids content in healthy check and virus diseased leaves of Chinese date tree, Zizyphus jujuqa Mill var. inermis Rhed, was carried out by authors throughout the growing season of 1959 and 1960 from June to October. The methods of qualitative analysis of free amino acids applied in this experiment is followed by Moore and Stein.^(1.2). free amino acids determined in this experiment are shown in Fig. 1 and Table 1. As the figure and the table are shown, three more amino acids such as glutarmine, asparagine and histidine are detected in the diseased material. The additiolal amino acids which are known as diamines in diseased leaves are conspicuous. It is presumed that the diamine might be increased by the self-reproduoion of the virus in cooporation with certain enzymes which are carrying out the protein metabolism in the host protoplast in contrast with the healthy checks which is carrying out normal protein metabolism,^(3.4.5). From the histological point of view, the facts of phloem degeneration or necrosis in diseased leaves, it seems to interrupt to move free amino acids from roots to leaves and it possibly takes place an excessive productitn of NH_3 which is diaminated by the metabolism of nitrogen compounds in such conditioned leaves.^(6.8) Therefore, it is also presumed that additional diamino acids are accumulated in diseased leaves. There are no change of amino acids in both materials of this plant throughout the growing season qualitatively, and this result agrees with the paper of Knight.^9

大學綜合試驗 出題에 關한 硏究

卞烘圭,吳鎭坤,申鎔鎭,金泳喆,鄭求福,柳哲鍾,洪允杓 全北大學校 1977 論文集 Vol.19 No.-

The Comprehensive Examination for the undergraduate students is planned to adopt the Jeonbug National University for the purpose of enhancing the quality of its educational outputs. In order to effectively measure and evaluate the level of student progress toward the minimun standard as the students who have finished their general education and basic education for their major field study, the university has decided to make an item pool related to the subjects for the examination. This study is an attempt to make good items of five required courses among general education subjects which are Korean Language, English, Korean History, National Ethics. and Natural Science and are expected to be the subjects of the examination. Instead of making those items separately from the regular examination during the academic semesters, the university plans to collect and use good items from the usual mid-term and final examinations of those subjects. A key concern, in this study, therefore, is to analyze all the items used for the mid-term and final examinations of those subjects during the regular academic semesters. From the data of an about 100 sample in each subject at each time of total three tests, the difficulty index, discrimination index, the response rate of students on each item, and other general descriptive statistics are calculated and then good items are pooled for the future use for the Comprehensive Examination. Anhother important concern in this study is this study is given to the collection and analysis of controversial issues and problems on the process of operating the examination at other universities where the Comprehensive Examination is already adopted. The data from four institutions and from opinions of six participants of this study are used. The following main findidings are summarized : 1. The items have generally shown to be easy while the degree of discrimination is low. 2. Among the five subjects, Korean Language shows the highest rate of right answer (difficulty index) while English the strongest one in the discrimination index. 3. When comparing two types of test between the multiple choice and the short-answer, the latter seems to be powerful in both difficulty and discriminative. 4. The only one question of essay type test reveals clear limitations in scoring and evaluating students progress. 5. All items are constructed under the consideration of content-referenced base, not of the basis on behavioral aspect. 6. The analysis of issues and problems related to the Comprehensive Examination suggests that it is acceptable to test in terms of required subjects of general education and a few most basic subjects of major areas of study. 7. The examination can be functionally operated when it is held at the end of the first year of and before the beginning of the second year of the college years. The length of the examination is usally held from three to five hours. 8. Since the examination should be existed on the idea of criterion-referenced base rather than of norm-referenced one because of its testing the qualification of the entering behavior of students for the further study in their major field, the standard of the pass-and-failure should be set on at least 60 percent of correct answers in each subject. But there must be provided at least two additional opportunities for the make-up examination for those who failed in the first one. 9. A special committee must be established in order to deal with all the details related to the Comprehensive Examination.

학교 주5일제에 관한 학생과 교사의 의식 분석

홍광식,최영자,이연화,정정임,장남덕 한국초등교육학회 2002 초등교육연구 Vol.15 No.1

본 연구는 학교 주5일제에 관한 학생과 교사의 의식을 조사분석하여 학교 주5일제 실시에 대응하고자 하였다. 조사 대상자는 초·중·고 학생 1558명과 교사 1077명이었다. 연구결과, 학생들은 현재 학교생활에서 공부하는 즐거움을 알지 못하고 친구들과의 교제에서 즐거움을 찾고 있는 것으로 나타났다. 학교 주5일제 관해서는 학생과 교사 대부분이 찬성하고 있으며, 찬성 이유는 여유있는 하루, 가족과 접촉시간을 갖고 취미활동을 하며 친구와 놀 수 있기 때문이라고 하였다. 교사들은 학교 주5일제로 인한 수업시수의 문제를 감축해도 상관이 없다는 반응이 많았고, 현재의 수업시수를 확보해야 한다는 의견은 적었다. 학생과 교사 대부분은 학교 주5일제는 학생들이 다양한 체험을 할 수 있는 기회를 제공하는 체제로 인식, 긍정적인 반응을 보였다. The purpose of this study is twofold: (ⅰ) to analyze students and teachers' consciousness on the proposed Five-day-work-week School System(FSS) plan; and (ⅱ) to propose a desirable direction of school management including curriculum compatible with the (FSS) plan. This study developed as follows. For the theoretical background of this study, previous research was reviewed. For the items of the questionnaire, the Japanese Ministry of Education Survey on the FSS at school was referred to. The Subjects sampled were 1558 students and 1077 teachers, The data collected from the at elementary, secondary and high school of students and teachers were statistically analyzed by using the SPSS WIN 7.5. The following are the results of the survey. First, in order to adopt the FSS plan, schools have to develop new programs connecting home and school. It is required that school develop special programs that the local community can participate in and cooperate with. Second, most of the respondents support the FSS plan because students can have more chances to be with their family, to become familiar with nature, and to attend various activities sponsored by the local organizations. Third, to argue that it is desirable to adopt the FSS plan even though school has to reduce the minimum class hours. The reason they are against the no-school-on-saturday plan is that there are many families who cannot take care of their children on Saturdays; thus, special programs for them should be prepared before the plan is put into practice. It is also required that we develop various sports or culture events for young adolescents and make up more organizations for youth. We should have school or community facilities open to young adolescents and children whose parents are unavailable to care for them. The latter should have an easy access to those facilities. From these observations, we can conclude that it is imminent to develop various programs before we put the FSS plan into practice. Schools should cooperate fully with homes and the community.

올레酸 메틸의 오존化 分解 : 不飽和 脂肪酸의 酸化(Ⅰ)

洪允命,趙英一,朴泰基 연세대학교 대학원 1972 延世論叢 Vol.9 No.1

The production of aldehydic materials from methyl oleate was investigated by ozonization technique. In the o2oni2ation, methanol was used as a solvent or diluent, and then ozonide was reduced chemically to obtain methyl azelaaldehydate and pelargonaldehyde, using zinc and acetic acid. From the experimental results, the solvent-ester ratio effected little on the production yield but the reduction temperature, which was preferred at about 30℃ was related significantly on the purity of the product. At the preferred conditions, the obtainable yield and purity was 74 and 87%, respectively. It is evidently suggested that the ozonolysis should he carried out in a short period, as soon as possible, in order to improve the yield and purity of product and avoiding contamination by the predicted side reactions.

공침법에 의한 BiDy₂Fe_(5)O_(12) 결정형 나노입자 분말의 제조 및 응용 연구

홍영대,조정환,김태엽,전성욱,홍영명 고신대학교 자연과학연구소 2007 고신대학교 자연과학연구소 논문집 Vol.14 No.-

금속산화물들은 각종 산업재료로서 유용하며 더욱이 그것들의 결정형 나노입자를 경제적으로 제조하는 기술은 21세기 첨단산업에 매우 중요하다. 저자들은 前報에서 화학합성법에 의한 각종 금속산화물의 나노입자를 제조하는 표준공정법을 연구하여 보고하였다. 본 연구에서는 그 표준공정법을 이용하여, 가넷의 일종인 BiDy_(2)Fe_(5)O_(12) 결정 나노입자 분말을 제조하고 그것의 자성체로의 응용을 위해 제품특성을 조사하었다. 가네트 제조과정에 필요한 침전물은 제품설계에 의거 몰비로 계산된 Bi, Dy, Fe의 질산염들의 혼합수용액에 침전제로서 pH NH_(3)-NH_(4)CI 완충용액 일정량을 가하여 얻어졌다. 이렇게 제조된 침전은 열처리과정을 거처 BiDy_(2)Fe_(5)O_(12) 결정형 나노입자 분말로 만들어졌다. 얻어진 제품의 입자크기, 조성, 결정구조 및 광자기성 등 특성시험이 SEM, ICP, XRD, 그리고 VSM 등을 사용하여 실시되었다. 각종 분석법을 사용하여 제품의 특성을 조사한 결과, 최초에 설계한 대로의 자성체가 나노 크기의 분말로 얻어졌으며 이것을 통하여 전보에서 확립한 표준공정법의 유효성도 입증되었다. Metallic oxides are useful as various industrial materials. Futhermore, the cost-effective techniques of fabricating the crystalline nanopartides of metallic oxides are very important for the high-tech industries of the 21 century, In the previous study, the authors reported the standard process for the preparation of crystalline nanoparticles of metallic oxides by chemical synthesis, In this study, BiDyzFesOiz nanoparticles were prepared by using the reported standard process and the characteristics of the product were investigated for applicability as magnetic substance. The precipitation needed for manufacturing process of garnet was made by adding the NH_(3)-NH_(4)CI buffer solution of pH 10 to the mixed solution of bismuth (III) nitrate, dysprosium(III) nitrate and iron(III) nitrate. The amount of each nitrate was calculated by the designed mole ratios. The nano-size crystalline powders of BiDy_(2)Fe_(5)O_(12) were earned by heating the precipitation at 800℃ for 4 hours in air. The characterizations, such as particle size, composition, crystal structure and magneto-optical property of garnet were tested by SEM, ICP, XRD, and VSM analyses. The results of the analyses showed the following two facts. First, a good magnetic substance of BiDy_(2)Fe_(5)O_(12) was earned as crystalline nano-size powders according to the original design. Next, the established standard process for the fabrication of METALLIC oxides nanonartieles was approved as a very effective method.

Factor analysis of Water Quality and Ecosystem in Jinhae Bay

홍순우,하영칠,안태석 江原大學校 附設 環境硏究所 1989 環境硏究 Vol.6 No.-

진해만의 6개 정점의 표·지층에서 1976년 7월부터 1982년 12월까지 물리화학적, 생물학적인 환경요소를 65회에 걸쳐 조사하였다. 이들 자료를 통계학적인 분석을 통하여 진해만의 수질및 생태계에 영향을 미치는 요인을 분석하였다. 그 결과 행암만 내부에 위치한 정점 6 을 제외한 전 해역에서 식물성 플랑크톤의 이상증식이 주요한 요인으로 생태계의 44∼56%의 변화를 설명할 수 있었으며, 정점 6 에서는 영양염류가 중요한 요인이 됨을 알았다. 두번째 요인으로는 담수의 유입으로 볼 수 있었으며, 이 요인은 외해로 나갈수록 그 영향이 적어져, 정점 4 에서는 의미가 없었다. 질소의 유입도 각 정점에서 주요한 요인이었으며, 그 외에 유기물의 증가, 도시하수의 유입, 영양염류의 침전 및 미생물에 의한 염류의 재순환과 광합성이 진해만에서의 수질과 생태계를 지배하는 주요 요인으로 확인되었다. In Jinhae bay, the physicochemical, biological and ecological surveys were carried out 65times at six sites both insurface and bottom water from July 1976 to December 1982. Twenty one abiotic andbiotic parameters were determined on each sample. These data were subjected to factor analysis to scrutinize the effects of environmental conditions on water quality and ecosystem. The phytoplankto blooming was the major factor of the variance of the water quality and ecosystem in Jinhae bay. Fresh water inflow was second factor at site 1 and 6, and it was third factor in site 3 and 5. The nitrogen inflow was also play an improtant role, which was second factor at site 2, 3, 4 and 5, and third factor at site 1. Beside above factors, the increasing of organic materials, waste water in flow, precipitation and recycling of nutrients, upwelling of sediment, nutrient, salts and photosynthesis were also determined for the variation of water quality and ecosystem.

약물치료에 가역적 회복을 보인 갈색세포종에 동반된 확장성 심근증 1례

홍숙경,최현,이승철,천경일,김영철,한재룡,김미숙,정경태,박순창 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.2

한국인의 경험생명표에 대한 통계적 해석

권용만,홍연웅 조선대학교 통계연구소 1999 統計硏究所論文誌 Vol.1 No.1

우리나라의 생명표는 미국이나 일본의 작성과정을 답습하거나 이론적 배경의 정립이 없이 경험에 치중하여 작성되는 경향이 있다. 그러나 보험요률 자유화에 즈음하여 보험회사별로 독자적인 경험생명표의 구축이 절실히 필요한 현실에 비추어 생명표에 대한 보험사의 대응은 실로 안이하다고 할 수 있다. 본 연구에서는 그동안 경험이나 직관에 의존한 경험생명표의 작성과정에 대하여 통계적 이론을 부연하고 기존의 추정방법의 문제점과 개선방향에 대하여 알아본다.

버텍스에 의한 숫자패턴 인식

辛烘圭,姜英鎭,朴鍾旭 圓光大學校 1987 論文集 Vol.21 No.2

본 논문에서는 도형 패턴의 윤곽선에 대한 버텍스 결정 방법을 도입하여 필기체 숫자 패턴을 인식하는 방법을 보였다. 본 방법은 입력 패턴의 윤곽선에 대한 버텍스의 관계로 부터 연결 링크와 접촉 링크를 추출하고, 패턴의 디스크립터를 유도하여 인식하는 방법이다. 그 결과 필기자의 관습에 의한 변형에 영향이 적고 인식 파라메타 수가 감소되었다. 또한 실험 결과 인식율이 대단히 높고 처리 시간도 세선화 방법에 비하여 30(%) 정도 빠르다는 것을 확인한다. In this paper, it is showed to recognize the Arabic numeral patterns by vertices decision from the contour line. This method is extracted links by vertices relation for input pattern and is recognized by inducing description function from the links. In this results, the affection of deformation due to the way of writters and the number of parameter for recognition are reduced, and experimental results show that recognition for hardwritten numeral patterns are effected and access time is reduced about 30 (%) compared with the conventional method using thinning process.

동(銅) 스래그로부터 유가금속의 회수에 관한 연구

金永弘 울산대학교 1992 공학연구논문집 Vol.23 No.2

동(銅) 스래그로부터 유가금속의 회수에 대하여 연구하엿다. 스래그에 5% carbon을 첨가했을 때 1573K의 반응온도에서 carbothermic reduction에 의한 Cu와 Ni의 최대 회수율을 얻을 수 있었다. 그러나 Cr의 회수율은 carbon의 첨가와 온도의 변화에 큰 영향이 없었다. 또한, 5% carbon에 5%의 CaO를 첨가했을 때 Cu와 Ni의 회수율은 크게 증가함을 알 수 있었다. 이러한 결과는 A, A, ICP, XRD, SEM-EDX, SEM-WDX 및 화학분석 등에 의해 관찰하였으며, 본 실험에서는 4시간 반을 후 최대 회수율을 얻을 수 있었다. The recovery of valuable metals was studied with copper slag. It was obtained the most Cu and Ni recovery when 5% carbon added to slag at 1573K by carbothermic reduction. But, carbon addition and increase of temperature has no effect on the recovery of chromium. Also, Cu and Ni recovery was very increased when 5% CaO added to 5% carbon. These results were investigated with A. A, ICP, XRD, SEM-EDX, SEM-WDX and wet chemical analysis etc.. In this study we can get the most recovery after 4hours reaction in copper slag.