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전오존처리에 의한 상수원수의 생물학적 처리효율제고에 관한 연구
남상호,Nam, Sang-Ho 한국상하수도협회 1997 水道 Vol.24 No.4
In an effort to prevent the formation of DBPs from disinfection and the microbial regrowth in distribution systems, the ozonation followed by biological filtration process in drinking water treatment train has been recently developed as an alternative process to reduce effectively water-born organic matter as precursor. There are, however, insufficient for the consistent information and data about the relation between ozone dosage based on organic surrogate parameter, TOC or DOC and effect of ozonation on BDOC formation. This study is to review critically for the effect of ozonation on biodegradability on the basis of published technical papers including the output from author's research laboratory. It truned out that : 1. ozonation in the presence of organic matter has a tendancy to increase in BDOC content, 2. the rate of BDOC formation was maximum below 1mg $O_3/mg$ DOC of ozone dose, but about maximum content of BDOC was obtainable at the range from 1.5mg $O_3/mg$ DOC to 2mg $O_3/mg$ DOC, 3. from above 1mg $O_3/mg$ DOC, the rate of BDOC formation became slow down, 4. from above 2mg $O_3/mg$ DOC, BDOC formation was quantitatively negligible, In conclusion, it needs further systematic study and research concerned to biodegradability and treatability by ozonation in terms of organic characteristics and experimental conditions because it was hard to find out the consistent experimental data comparable each other that were performed by numbers of research authors.
남상호,김영조,Nam, Sang Ho,Kim, Yeong Jo Korean Chemical Society 2001 Bulletin of the Korean Chemical Society Vol.22 No.8
The excitation temperature and electron number density have been measured for end-on-view ICP discharge. In this work, end-on-view ICP-AES equipped with the newly developed “optical plasma interface (OPI)” was used to eliminate or remove the neg ative effects caused by end-on-plasma source. The axial excitation temperature was measured using analyte (Fe I) emission line data obtained with end-on-view ICP-AES. The axial electron number density was calculated by Saha-Eggert ionization equilibrium theory. In the present study, the effects of forward power, nebulizer gas flow rate and the presence of Na on the excitation temperature and electron number density have been investigated. For sample introduction, two kinds of nebulizers (pneumatic and ultrasonic nebulizer) were utilized.
An Ultrastructural Study on Larval Hemocytes of Orthoptera
남상호,양희영,김우갑,김창환,Nam, Sang-Ho,Yang, He-Young,Kim, Woo-Kap,Kim, Chang-Whan Korean Society of Electron Microscopy 1978 Applied microscopy Vol.8 No.1
방아깨비, 사마귀, 섬서구메뚜기의 종령유충을 재료로 하여 전자현마경적 관찰을 하였다. Prohemocyte는 세포중 가장 작고 구성비도 낮으며 그 구조상 다른 혈구의 기원이 되는것 같다. Plasmatocyte는 나비류에서 와는 달리 그 형태가 대부분 난형이고 허족과 소기관을 가장 많이 가진다. Granular Cell은 종에 따라 그 형태가 뚜렷이 구분되며 어느 경우나 구성비는 높았다. 같은 세포의 과립이라 할지라도 그 미세구조가 몇 가지로 구분되고 이것은 아마도 축적단계에서 오는 결과인듯 하다. Adipohemocyte 는 방아깨비에서만 나타났고 구성비는 대단히 낮았다. An electron microscopical study on hemocytes of last instar larvae of Orthoptera (Acrida cinerea Thunberg, Paratenodera sinensis De Saussure, Atractomorpha lata Hotschulsk was performed to observe cell types, structures and their origins. Prohemocytes are the smallest round cells with large, nucleus, poorly developed cytoplasmic organelles and lower composition ratio, accouting for less than 1% of all cell types. Little remarked differences were revealed among different species. Plasmatocytes are relatively large cells with higher composition ratio, accounting for 5 to 20%. The majority of the plasmatocytes are oval forms with numerous external cytophismic projections., relatively well developed cytoplasmic organelles. Granular cells are characterized by various granules in cytoplasm. Some considerable remarked differences were revealed among different species. Furthermore the granules themselves differ in fine structures. Adipohemocytes were found only in Acrida cinerea Thunberg.