모관분리기법에 의한 고농도 폐수의 처리에 관한 연구

서광석 京畿專門大學 1998 京畿專門大學 論文集 Vol.- No.26

This paper is an experimental research on the capillary separation treatment of the synthetic wastewater and leachate in Kimpo landfilling site using the wood refinary fibers(WRF) and simple wooven textiles(SWT) materials. WRF and SWT are the very water-suctionable materials, and its physico-chemical characteristics are investicated the previous study. As a results, in the experimental results of the synthetic wastewater and the leachate treatment, kaolinite and milky waste-water treated perfectly, and the leachate treated partly. And treatibility depend on only the initial concentration of wastewater, not the capillary height, area, and shapes.

교원효소로 유발된 랫드 대뇌 출혈병변의 병리학적 관찰

서일복,소경순,김광호,김영석 世明대학교 한의학연구소 1998 韓醫學硏究所 論文集 Vol.1 No.-

This study was carried out to characterized the hemorrhagic lesion sof the collagenase induced hemorrhagic stroke in rats. Fifty three Sprague-Dawley male rats were divided into two group. Group Ⅰ was served as model animals for hemorrhagic stroke, which were infused with 2㎕ saline containing 0.5unit collagenase(type Ⅶ) into the caudaate nuclei. Group Ⅱ was served as control animals, which were infused with 2㎕ saline only into the caudate nuclei. Six heaks of the rats of group Ⅰ were sacrificed at 30 min, 1, 5, 24 hours, 2, 5, 10 days after the infusion , and 3 heads of rats were sacrificed at 15 days after the infusion. Two heads of the rats of group Ⅱ were sacrificed at 30min, 1,5, 24 hours after the infusion. The brains of the rats were removed and examined grossly and histopathologically. Grossly, pin point sized or linear hemorrhage were occurred at 30minutes and the hemorrhagic lesions extended to 5mm in diameter at 24 hours. After then the hemorrhagic lesions faded gradually. Histopathologically, extended hemorrhage with degeneration of brain parenchyma were observed at 5 hours. Large area of malacia were observed at 24 hours. At 5 days, proliferation of astrocytes, proliferation of newly formed capillaries, and infiltration of lipid laden macrophages were seen at the periphery of the area of malacia. At 15 days, most of the area of malacia were replaced by granulation tissue. These observations may be useful parameters for the screening of therapeutic drugs using collagenase induced hemorrhagic stroke animal model.

합성수지 용기의 환경성 평가에 관한 연구

서광석,민달기 京畿專門大學 1999 京畿專門大學 論文集 Vol.- No.27

This paper is a research on the life cycle assessment (LCA) of plastic bag, bottle and container. In order to compare the environmental analysis of plastic, paper, pulp, aluminium, glass and steel material, it is studied by LCA technique from before-discarded step such as the material collection, processing of product, energy and water consumption, and product transportation, to after-discarded step such as waste product transportation, air and water pollutant discharge, waste generation, and treatment and/or disposal of waste. As a results, plastic material has a better environmental assessment than the other materials in before- and after-discarded step. So, plastic material must be newly concerned with a green material, and must be reappraised to the waste-deposit systems.

국내 우유용기 생산 및 사용실태 조사·분석

서광석,민달기 京畿專門大學 2000 京畿專門大學 論文集 Vol.- No.28

Up to now all carton packs used for milk container in our country have been imported abroad. With rapid increase of interest on environment and waste recycling, Environmental Societies and Civil Consumer's Organization restart the Use of Glass Bottle for Milk Movement. From preliminary survey result that glass bottle had many advantages in most test items, we chose the glass bottle as substitute for carton pack, and proposed some regulations such as usable range and detailed regulation, etc. Because at this time it is impossible to rebuild whole pack manufacturing process to substitute carton pack to glass bottle, it may be more favorable to use glass bottle for milk packing under some restricted condition such as easy recollection and reusable circumstances. In addition some governmental regulations to promote glass bottle milk productions and sale and to return all used glass bottles are absolutely required in group catering system. If above is impossible, it will be next choice to set up regulations of milk packing as well as to use glass bottle at some position, and adopt a consumer deposit system in order to increase glass bottle usage, which will help environmental protection and economy.

고·액 분리를 위한 모관분리능의 수학적 모델 산정에 관한 연구

서광석,민달기 京畿專門大學 1997 京畿專門大學 論文集 Vol.- No.25

완전 직장탈 환자에서 변실금에 영향을 미치는 인자

윤서구,이광렬,김건욱,송석규,김칠석,이종균,김광연 대한대장항문학회 2001 Annals of Coloproctolgy Vol.17 No.1

자동차 대수 및 차속변화에 따른 오염물질 배출량 변화에 관한 연구

서광석,김종규 京畿專門大學 1994 京畿專門大學 論文集 Vol.- No.22

한국산 자리공 자리공 열매의 적색소를 이용한 식용색소 : Ⅱ. 활성 사포닌을 제거한 색소의 안정성과 가공적성 Ⅱ. Color Stability and Characteristics as Food Colorant of Saponin-Free Pokeberry Pigments

박용석,서지연,황혜정,박기환,윤광로 中央大學校 食糧資源硏究所 2003 食糧資源硏究所 論文集 Vol.15 No.1

우리나라산 자리공 열매의 색소 함량은 산지에 따라 건물 g당 48.56에서 62.16mg으로 천연색소 자원으로 높은 편이였으며 산지간의 격차가 크지 않아 자원성이 좋은 편이었ㄷ. 자리공 열매의 적색소를 absolute ethanol 침전법으로 분획하는 과정에서 활성 사포닌이 95% 이상 제거되며 이 색고 침전물을 silica gel column이나 Sephadex G-25 column으로 정제함으로서 색소의 순도를 높일 수 있었다. Absolute ethanol 처리와 column 정제법을 응용하여 활성 사포닌을 제거 한 실험용 자리공 열매색소 분획 모두 색소 안정성이나 가공적성에서 뚜렷한 차리를 보이지 않았다. 따라서 absolute ethanol만 처리한 색소제품이나 이를 column chromatography로 정제한 색소분획 모두 고순도의 천연색소 첨가물로의 응용 가능성은 분명하였다. 이들 활성 사포닌을 제거한 자리공 열매색소의 색소안정성과 가공적성은 다음과 같이 요약 할 수 있다. 즉, pH 안정범위는 4.8-6.0이었으며, 열에 대한 안정성을 조사한 결과는 4℃에서 45일 저장했을 때는 70%의 색소 잔존율을 나타낼 정도로 안정한 편이었지만 25℃에서는 10일째에서 70% 잔존율을, 50℃이상의 온도에서는 수 시간 정도에서 50%이하의 색소 잔존율을 보여 전반적으로 열 안정성은 불량한 편이었다. 한편 이들의 존재 하에서는 급격한 변색이 진행되었다. 자리공열매 색소에 대하여 ascorbic acid나 palmityl ascorbate의 첨가는 색소 잔존율에 큰 영향을 미치지 않았으며 chlorogenic acid, resocinol 그리고 catechin의 첨가도 마찬가지였다. 포도당, 과당, 맥아당, 설탕, 펙틴, 셀루로스 그리고 cyclodextrin 등의 탄수화물도 전혀 영양을 미치지 않았다. 1000ppm 이내의 EDTA나 citric acid, malic acid 또는 oxalic acid 등의 산도 미치지 않았다. 금속이온으로서, Ca^(2+)과 Al^(3+)의 첨가는 색소의 잔존율에 큰 영향을 미치지 않았으나, Cu^(2+)나 Fe^(2+)의 첨가는 심한 변색을 초래하였다. 자리공 열매즙의 무수 알코올 처리물(적색 색소 침전물)은 soft gel, firm gel 또는 캔디 등의 고형 식품에 잘 어울리고, 음료에서는 변색이 빠르게 진행되며, 특히 요구르트의 경우가 가장 민감하였다. 결론적으로 보면, 우리나라산 자리공 열매에서 활성 사포닌을 제거하고 확보한 색소제품은 사탕무의 betanin과 거의 같은 색소안정성과 가공적성을 보여 줌으로서 사탕무색소 첨가제인 beet red를 대신할 수 있으며 색소의 함량이나 순도라는 관점에서는 훨씬 우수할 것으로 사료된다. To evaluate the basic data on the color stabilities of saponin-free pokeberry pigment products, % remain of pigment were calculated from absorbances of solutions stored at various conditions. The pigment products were estimated to be very stable at pH 4.8-6.0. Thermostability of pH 5.0 solution of pigment products could be kept stable below 4℃. Addition of Cu2+ or/and Fe2+ decreased the % remain of pigment, whereas most food components had no offset the stability of pokeberry pigment. The color changes of some model foods having pokeberry pigment were checked by Hunter color differerence meter for 45 days. In solid foods like gels and candy the changes of color difference were very slower than that of model beverages. Application of pokeberry pigment to soft drink and yogurt were found to be effective at the refrigerated condition.

양돈농가의 정보이용과 S/W활용에 대한 조사 연구

조광호,서종석 한국농업정보과학회 2001 농업정보과학 Vol.3 No.1

This study was done to examine the problems and resolutions for the hog farms in the current and future direction of information utilization and hog management software. Based on the survey of 70 farms which possess computers in Honam area, the main object of purchasing computers was to use in day to day life such as childrens' education. The object of purchasing for business use or information collection was relatively minor. The sites most frequently visited by internet were in the field of childrens' education, followed by agricultural marketing. The fields hog farms concern in the near future are found to be the sites, by the order, in marketing, children's education, e-mail, agricultural technology, agricultural management, and weather forecast. Besides the contents development in these fields, development of agricultural software seem to be urgently needed. Since hog management softwares have contributed to raise the accuracy in decision making by 20%, to raise productivity and profitability, to reduce labor and cost, and to raise quality(10%, respectively).

Azithromycin으로 치료한 임신 중 쓰쓰가무시병 1예

김광석,최진욱,서호종,김기훈,박성호,서광섭,고성만,김순혜,김호정 대한감염학회 2001 감염 Vol.33 No.5

We report a case of tsutsugamushi disease in a 26 year-old pregnant woman who was treated with azithromycin. Her gestation period was 27 weeks and she admitted with fever, rash, and eschar on the right shoulder. Currently recommended medications for the treatment of scrub typhus are doxycycline or chloramphenicol. But, these drugs are class D drugs according to the U.S. Food and Drug Administration (FDA) Fetal Risk Summary, so they couldn't be used to treat pregnant women. Recently, a few case reports suggested that azithromycin, a relatively new macrolide antibiotic, was effective and safe for the treatment of scrub typhus in pregnant women. And, there is no evidence that azithromycin causes harmful effects to the developing fetus or to children. On the basis of current in vivo test that confirms the effectiveness of azithromycin, it may be the drug of choice for the treatment of scrub typhus in pregnant women and children. (Korean J Infect Dis 33:380-382, 2001)