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저급 벤토나이트를 이용하여 합성한 4A형 제올라이트의 응용
노재성,홍성수 忠南大學校 産業技術硏究所 1988 산업기술연구논문집 Vol.3 No.2
Amorphous silica produced from low grade bentonite B₁by acid treatment was used for zeolite synthesis. The zeolite 4A was used for detergent-use. The results are summerized as follows. (1) When the condition of water hardness was 40℉h, water temperature was 30℃ and the stirring rate of water was 200rpm. the cation(Ca) exchange capacity of synthetic zeolite was observed as 307㎎ CaCO₃/ g zeolite for fifteen minutes. The amount of Ca ion exchanged by zeolite was more than 95 percent within three minutes. (2) The brightness of the synthetic zeolite was between 91 and 93. The median particle size of the synthetic zeolite was 3.0㎛. (3) In differential thermal analysis, the dehydration of the synthetic zeolite was detected between 35℃ and 500℃, lattice transformation take place at about 800℃. In thermal gravimetric analysis, the weight loss of the snythetic zeolite was 20.94 percent by dehydration between 33℃ and 511℃.
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洪聖洙 中央大學校 韓國藝術硏究所 1995 中央大學校 藝術大學 創論 Vol.14 No.-
In the field of domestic electronic products, Audio product is not so wide ranged but it is the products everyone wants to need and posess and moreover it is one of the most preferable products for the youth. The preference of the youth, who pursues a strong power and styles of marked imaginative individuality, has something in common all over the world. Businessmen are obliged to develop the Audio product suitable for preference of the youth and try to increase their profit by supplying not only overseas market but local market. Accordingly, we should escape from the exising simple image and fulfil our own reguirements of self-realization. That is, the design of Audio product must be equipped with high-fashioned, innovatory And individual styles and function which are well-matched for the time personality. At the recent the style of Radion cassette "Mircro-compo" conformed with such an image is developed and appeared. Micro-compo is a new combination style of Audio product for both images of micro cassette and component system. It is a big merit that is much helpful for the youth in a good use of leisure and their sentiments. So the purpose of the study is to understand the existing problems and look for a new direction of settlement by reserching and analizing objectively prices, functions, colours and style for Audio product that is make preparation for 21th century.
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홍성수,Hong, Seong-Su 한국사료협회 2007 飼料 Vol.6 No.2
정부(농림부)에서는 지난 3월 7일 사료관리법 및 관련고시 개정작업의 일환으로 "수입사료사후관리요령"을 개정.고시 한 바 본회에서는 회원공장의 원활한 사후관리 업무수행에 도움을 주고자 담당 실무자 교육을 실시하여 성황리에 마칠 수 있었습니다. 이에 본지에서는 사후관리 교육내용을 요약 게재하여 관련된 독자들의 이해를 돕고자 합니다
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洪聖洙,鄭錫佶 中央大學校 韓國藝術硏究所 1996 中央大學校 藝術大學 創論 Vol.15 No.-
a study on the ballistic helmet design of korean style : For this study we analyzed helmats which got from inside and outside of the country about structure, function, materials, design, etc.. To determine idel coverage, we examined anthropometry data of korean adult. Also we developed helmet design for the maximum performance. As we offered three types of helmat size, ninety nine percent of soldier will use this helmat comfortably. The weght is very light and ballistic function is excellent because material is polythlene. For more develop this study in the future, we need anthropomety data from population of soldier and we have to make mathematical model of soldier before we design helmat, futhermore we need ballistic testing which is very important data for the dcision and evaluation.
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Er:YAG 레이저의 법랑질 및 상아질의 삭제효과 비교
홍성수,이상호,이창섭,김수관,Hong, Seong-Su,Lee, Sang-Ho,Lee, Chang-Seop,Kim, Su-Gwan 대한소아치과학회 2001 大韓小兒齒科學會誌 Vol.28 No.4
The purpose of this study was to investigate the effects of Er:YAG laser on cutting of efficacy of enamel and dentin in primary and permanent teeth. We used the enamel and dentin specimens of human teeth which contain the physiologic saline and maintain the pulpal pressure in dentinal tubules. Each specimen was exposed to Er:YAG laser with non-contact mode under different treatment condition of irradiation energy, pulse repetition rate. We investigated the cutting efficacy of Er:YAG laser by Scanning Intensity Microscopy, and obtained following results. 1. Cutting volume of enamel and dentin in primary and permanent teeth were increased by increasing the irradiation energy, pulse repetition rate. 2. Cutting volume of primary teeth was larger than that of permanent teeth. 3. Cutting volume of dentin was larger than that of enamel in primary and permanent teeth. From these results, Er:YAG laser would be more effective in cutting dentin than enamel, and in cutting primary teeth than permanent teeth for clinical application. Er:YAG 레이저의 유치와 영구치에서의 법랑질 및 상아질 삭제효과를 비교, 평가하고자 발거된 유치와 영구치를 대상으로 상아세관 내 조직액과 치수 내압을 유지할 수 있는 치아 시편을 제작하고 Er:YAG 레이저를 비접촉식 방법으로 조사세기, pulse repetition rate 등의 조사조건을 달리하여 치면에 조사하고 이때의 치아 삭제량을 비접촉식 삼차원 표면형상 측정기로 측정하여 다음과 같은 결과를 얻었다. 1. 레이저 조사세기와 pulse repetition rate가 클수록 치아 삭제량이 증가되었다. 2. 유치에서의 삭제량이 법랑질과 상아질 공히 영구치에비해 컸다. 3. 상아질에서의 삭제량이 유치와 영구치 모두 법랑질에서의 삭제량보다 컸다. 이상의 결과를 종합해 볼 때 Er:YAG레이저는 영구치보다는 유치에서 그리고 법랑질에서보다는 상아질에서 삭제효과가 더 큰 것으로 사료되었다.
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홍성수,Hong, Seong-Su 한국사료협회 2007 飼料 Vol.6 No.4
사료의 품질향상과 안전성 제고를 통해 위생적이고 안전한 축산물을 소비자에게 공급하는데 기여하고자 매 년 농림부에서 주최하는 사료품질 및 위생.안전성 교육이 금년에는 사료협회의 주관 하에 지난 6월 7,8일 양일간에 걸쳐 경상북도 정주에서 성황리에 개최되었다. 이에 본지에서는 동 교육에 대한 결과보고와 아울러 교육 당시 뜨거운 관심사였던 항생제 대체물질과 항생제 사용절감방안에 대한서울대 김유용 교수의 강의 내용을 요약하여 사료품질 및 안전성에 대한독자들의 이해를 돕고자 한다.
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Synthesis of BiVO<sub>4</sub> nanocrystals using microwave process and their photocatalytic activity
홍성수,( Trinh Duy Nguyen ),이근대 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
An efficient microwave-assisted synthesis of BiVO<sub>4</sub> nanocrystals, using bismuth nitrate pentahydrate (Bi(NO<sub>3</sub>)<sub>3.5</sub>H<sub>2</sub>O) and sodium orthovanadate (Na<sub>3</sub>VO<sub>4</sub>) as the starting precursors, ethanol and water as the solvent, together with postassium oleate as the additive reagents, has been developed. The mixed solution was treated in the microwave with an irradiation power at 300, 600 and 900 Watt for 5, 10, 20 and 30 min, respectively. The physical and photophysical properties of the samples were characterized by TG/DTA, XRD, Raman, PL, TEM and DRS. We also investigated the photocatalytic activity of these materials for the decomposition of rhodamine B under visible light irradiation.
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홍성수,Hong, Seong-Su 한국사료협회 2007 飼料 Vol.6 No.4
지난 6월 22일 농림부 국제농업국은 농업관련단체장을 대상으로 현재 진행중인 DDA협상과 기 체결되었거나 협상 진행중인 각국 FTA 현황에 대한 설명회를 개최하였다. 이에 본지에서는 FTA에 대한 독자들의 뜨거운 관심을 대변하는 차원에서 동 설명회내용을 요약 게재한다.
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