UV 광산화 공정 및 광촉매 공정을 이용한 벤젠 및 톨루엔 가스의 처리

황철원,전보경,김찬훈,서정민,최금찬 동아대학교 환경문제연구소 2003 硏究報告 Vol.25 No.2

Volatile organic compounds (VOCs) are widely used in both industrial and domestic activities. This extensive use results in adverse effect in aquatic, soil and atmospheric environments. Conventional methods for treating VOCs from gas streams, such as absorption, adsorption, condensation and thermal /catalytic incineration all have their inherent limitations and none are definitely cost-effective to treat emissions from the small workplace such as architectural coating, printing, and dry cleaning. In this study, photooxidation-photocatalytic oxidation process was applied in the decomposition of VOCs and benzene and toluene, typical VOCs in industrial area, which were adapted as experimental gases. In photooxidation process, the decomposition efficiency of benzene and toluene was evaluated by varying different conditions, such as UV output, flowrate and background gas. The results showed that the decomposition efficiency of benzene and toluene increased considerably with increasing UV output and retention time. In case of background gas, the decomposition efficiency in standard air was higher than that in nitrogen. In photooxidation-photocatalytic oxidation process, the decomposition efficiency was higher than that in photooxidation process and the concentration of ozone generated from photooxidation reactor was drastically decreased after photocatalytic oxidation process. From this study, the results indicate that photooxidation-photocatalytic oxidation process is ideal for treatment of benzene and toluene from the small workplace. But further process optimization must be achieved to apply this process in workplace.

5-〔3-(N-Substituted Piperazinyl)Propoxy〕Indan類의 合成과 中樞神經抑制效果

黃熙喆,閔庚鎭,文勝煜,李萬佶,徐丙天 嶺南大學校附設 基礎科學硏究所 1985 基礎科學硏究 Vol.5 No.-

Five new indans, 5-[3-(N-substitued piperaziny) propxy]indans, were synthesized by condensation of 5-(3-bromopropoxy)indan, the intermediate, and N-substituted piperazines. The structure of the compunds were determined by means of IR, NMR spectoscopy along with elemental analysis. Each compound was tested for antimorphine and antiamphetamine effects as part of CNS depressant effects and for muscle relaxant action in mice. Thes compound exhibited less potent activity compared to chlordiazepoxide on CNS depressant effect. Muscle reaxant action of the compounds, the side effect of tranquilizer, however, was much weaker than that of chlordiazepoxide.

국가정보보호수준 측정 및 활용에 관한 연구

황철중,주용완,민경식,정경호 한국정보사회진흥원 2006 정보화정책 Vol.13 No.3

정보보호 수준을 측정하는 것은 매우 어려운 일로써 정보보호의 영역이 계속 확장됨에 따라 개념자체를 정의하기가 어렵고 아울러 다차원적인 요인을 포함하는 정보보호 지표 선정의 어려움, 시계열적인 통계 데이터 부족, 상이한 정보보호 지표를 하나의 지수로 통합하는 문제가 있기 때문이다. 그럼에도 불구하고 정보보호수준을 계량적으로 측정하기 위한 방법론으로 가장 적합한 것은 지수화하는 것이다. 이는 정책입안자나 정보보호 이해관련자들이 종합적인 측면에서 정보보호수준 목표를 결정하고 실행결과를 평가하는데 용이하기 때문이다. 본 연구의 목적은 정보보호정책 수립 및 평가의 기초 자료로 활용할 수 있는 지수를 산출하기 위한 종합적인 정보보호수준 평가지수 모델을 제시하고 지수를 산출하는데 있다. 지수산출결과, 정보보호수준은 2002년부터 2005년까지를 시계열적으로 보면 매년 평균 5.8%의 증가추세를 보이고 있다. 반면 역기능수준은 2003년 1.25 인터넷 대란으로 증가한 것을 제외하고 꾸준한 감소추세를 나타내고 있다. 특히 정보보호수준과 역기능수준이 발산하고 있어 정보보호정책이 유효하게 작용하고 있다고 판단되어진다.

영암댐의 어도를 이용하는 회유성 어류 자원의 계절적 변화 연구

오철웅,황종서,박경양,송태곤 木浦大學校 沿岸環境硏究所 1999 沿岸環境硏究 Vol.16 No.1

영암호 통선겸용 갑문식 어도에서 총 30회의 어류 조사 결과 줄공치, 웅어, 숭어, 빙어, 전어 등 총 25종이 출현하였다. 어도의 출현 종은 계절별로 종조성, 개체수, 생체량에 있어서 크게 변동하는 것을 보여 주었다. 월별 총출현 종수는 6월에 12종으로 가장 많은 종이 출현하였으며, 다음으로 7, 8, 9월에 11종, 10월에 10종이었으며, 11월에 6종, 4월과 5월에 각각 5종으로 가장 적은 종수의 출현하였다. 종다양도지수 또한 6월에 1.048로 가장 높았으며, 11월에 0.346으로 가장 낮게 나타났다. 출현종의 개체수는 봄철이후로 전반적인 감소 경향을 보여 주었으며, 주요 우점종의 전체 개체수는 줄공치, 웅어, 빙어, 숭어의 순으로 나타났다. 생체량도 개체수의 변화와 마찬가지로 봄철이후로 전반적인 감소 경향을 보여 주었으며, 주요 우점종에 대한 전체 비율를 보면 웅어, 줄공치, 빙어, 숭어의 순으로 나타났다. 이러한 영암호 통선겸용 갑문식 어도에서 어도 이용 생물의 종조성, 개체수 및 생체량의 뚜렷한 계절적인 변화 (temporal variation)를 관찰 할 수 있었다. 이러한 결과는 계절별로 다양한 종들이 그들의 생활사의 일부 기간에 어도를 효과적으로 이용하고 있다는 것을 반영해 주었다. 우점종의 한종인 줄공치의 체장빈도분포 분석결과 줄공치는 두개의 연급군으로 이루어져 있으며, 두번째 연급군이 탁월 연급군이었다. 가입은 주로 여름철 (8월과 9월)에 일어났다. 이러한 결과는 줄공치가 치어기부터 성어기까지 어도를 이용하고 있다는 것을 지적해 주고 있다. Investigations were made on the temporal changes in species composition and species diversity, number of individuals and biomass of fishes in the fish way constructed at Young-am Dam. During the sampling period total 25 species were observed. Of these, dominant species were Hemiramphus kurumaeus, Coilia ectenes, Mugil cephalus, and Hypomesus olidus. Number of species was the most numerous in June (12) and the least in April and May (5). Similar results were found in the species diversity index (H'), which was 1.048 in June and 0.346 in November. There were variations in number of Individuals and biomass of fishes in the fish way, showing a gradual decline from summer to Autumn. This suggests that a variety of adult and larval fishes utilized in the fish way as a channel of migration in relation to their life history. Number of individuals (percentage of total number) was in the order of Hemiramphus kurumaeus (63%), Coilia ectenes (17%), Hypomesus olidus (15%), Mugil cephalus (5%) and biomass (percentage of total biomass) in the order of Coilia ectenes (51%), Hemiramphus kurumaeus (35%), Hypomesus olidus (7%), Mugil cephalus (4%). For one of the dominant species, Hemiramphus kurumaeus, length-frequency distribution showed that it consisted of two cohorts, with predominance in the 2nd cohort and recruitment occurred mainly in August and September, indicating utilization of fish way at various stages during its life history.

플라즈마를 이용한 유리섬유강화 복합절연재료의 표면처리에 관한 연구

이규철,남창우,김희대,황영한,김경석 울산대학교 1997 공학연구논문집 Vol.28 No.1

본 연구에서는 에폭시계 복합 절연재료 Glass-cloth/Epoxy 의 계면 접착특성을 향상시키기 위하여 표면처리 조건에 따라 각각 복합 절연재료를 제작하였고, 전기·기계적특성의 상관관계를 다음과 같은 실험을 행하여 비교하였다. Glass의 젖음의 정도를 평가하기 위하여 표면처리 조건에 따라 주위온도 80[℃]에서 접촉각을 측정하였고, 주위온도 및 인가전압을 변화시키면서 비유전율(εr), 유전정접(tanδ) 및 전기적 절연강도를 측정하였다. 기계적 특성을 측정한 후에 파단면의 형상을 SEM으로 분석, 검토하였다. 실험 결과, (1) 주위온도가 상승함에 따라 비유전율 및 유전정접은 증가하였고, 전기적 절연강도는 감소하였으며 플라즈마 처리함으로서 전기·기계적특성은 전반적으로 향상되었다. (2) 접촉각 측정 주위온도가 80[℃]일 때, 표면처리 조건에 따른 젖음성은 각각 다르게 나타났고 플라즈마 처리효과는 표면세정, 미세요철, 표면대전 및 젖음성의 감소와 같은 복합효과로 볼 수 있다. (4) 전기·기계적특성의 관점에서 복합 절연재료의 경화온도가 80[℃]일 때, Glass-cloth/Epoxy복합 절연재료의 최적처리시간은 3분 정도로 나타났다. The Glass-cloth/Epoxy composite insulating materials for this study have been prepared with several different surface treatmenttechniquen such as untreatment ultrasonic treatment and plasma treatment, and their electrical and mechanical characteristics have been compared each other. It has been found that plasma-treated glass has the smallest contact angle with a drop of epoxy. The plasma-treated composite materials have superior dielectric strength and mechanical tensile-strength compared to the materials subjected to other surface treatments. Also, the experiment showed that there exists an optimum plasma treatment duration for improving the interfacial characteristics of the composite insulating materials. The optimum plasma treatment durations are about 3 minutes for Glass-cloth/Epoxy at 80[℃]. Longer plasma treatment has been appeared to degrade the interfacial characteristics.

혼합형 뇌졸중의 임상적 의의 : 비색전성 뇌경색 환자를 중심으로

이병철,유경호,도화범,권기한,황성희,김형철,강익원 대한신경과학회 1996 대한신경과학회지 Vol.14 No.1

정신분열병에 대한 Risperidone의 효과 및 안전성에 관하여

신석철,왕성근,지익성,이선우,이규광,이봉희,이진영,황선희,신용재,배경도,김정란 충남대학교 의과대학 지역사회의학연구소 1997 충남의대잡지 Vol.24 No.1

In order to evaluate the efficacy and safety of risperidone, 10 patients with chronic schizophrenia were examined for 8 weeks in a silgle-open study. After the wash-out period of 1 week, risperidone was administered. Efficacy was evaluated by means of Positive and Negative syndrome Scale for Schizophernia(PANSS) and Clinical Global Impression(CGI). Safety assessment included the Extrapyramidal Symptom Rating Scale(ESRS), vital signs, body weight, ECG, and laboratory tests. The results were as follows 1) On the PANSS total score, there was significant improvement of total score after 1 week (P<.05) of administratiom. 2) On the PANSS positive and negative subscal, there were significant improvement of posotive and negative scores after 2 weeks (P<.05) of administration. 3) On the PANSS general psychopatholgy subscals, there were significant improvement of general psychopathologyscores after 1 week (P<.05) of administratiom. 4) On the CGI, there was significant decreasement of clinical impression of severity of schizophrenia score after 2 week (P<.05) of administration. 5) A statistically significant increase in body weight (P<.05) was observed after 8 weeks of administration. 6) EPS reached the peak at the end of the 1st week of administration of risperidone (11.8± 24.25) but they were easily relieved by addition of benztropine and clonazepam. There was not significant change in laboratory tests, vital sign, ECG after 8 weeks of administration. These results suggest that Risperidone is an effective antipsychotics and clinically safe except for increased body weight in chronic schizophrenia.

산업근로자의 식생활 의식행태 조사

김무룡,황연자,차경미,이순자,위광복,남철현,김기열,김홍길 慶山大學校 保健福祉硏究所 1997 保健福祉硏究 Vol.1 No.-

This study was carried out to grasp the awareness and habits of food intake and use the information for health education program in order to help healthy dietary life. The survey was done in cooperation with health manager in industries on 1,200 workers who was selected randomly from 5 types of industries from Sep. 2 to Oct. 31, 1995. The results are summarized as follows: 1) The percentage of subjects who assess themselves "Healthy" was more higher in female, in 20∼29 age group, in single, in daytime workers, in college graduate than other groups respectively. 2) As for the degree of health education satisfaction, 35.5% of the subjects answered "dissatisfaction" 3) As for the exercise, 52.7% exercised for their health and the rate of exercise was more higher in male, in 30 years age group, in single than other groups respectively. 4) The rate of smoking was 57.6% and the rate of drinking alcohol was 47.3%. 5) 92.8% of the subjects got stress everyday and the rate is more higher in female, in less than 19 years old, in single, in longer working duration, in lower income, in high school graduates, in workers of product field line than other groups respectively. 6) As for drinking times of coffee or soft drink, two times per day was 29.5%, more three times per day was 28.0%. As for the eating speed of meal, 46.0% of the subjects answered "fast" and the rate was more higher in male, in 30 years age group, in married group, than other groups respectively. 7) With regard to the level of preference to instant food, 23.1% preferred to take instant food. As for the level of preference to hot and salty food, 28.1% preferred to have hot and salty food. 8) The score of eating behavior was 3.38±32 point to 6 point full marks. 9) With regard to the correlation among related variables, the variables of gender, marital status and working duration had positive relation with the variables of regular meal intake, the preference to food intake between regular meals.

정신분열증에서 공존하는 신체질환에 대하여

지익성,왕성근,신석철,이선우,황선희,신용재,김정란,배경도 충남대학교 의과대학 지역사회의학연구소 1999 충남의대잡지 Vol.26 No.1

In order to determine the frequency of physical illness in schizophrenia, 107 schizophrenics were assessed with physical exam and routine laboratoy test. The results were as follows 1) Among the total number of 107 schizophrenics, 31 had the physical illness(29%), and among the schizophrenics with physical illness, female outnumbered male at the rate of 17:14. 2) There was no difference between schizophrenics with physical illness and schizophrenics without physical illness in demographic characteristics. 3) Classification of physical illness were disease of skin 7 (22.6%), musculoskeletal system 5(16. 1%), ENT(ear nose throat) 3(9.7%), endocrine system 3(9.7%), circulatory system 2(6.5%), respiratory system 2(6.5%), digestive system 1(3.2%), genitourinary system 1(3.2%), infection 1(3. 2%), eye 1(3.2%) respectively Authors suggest that physical exam and routine laboratory test should be done for all hospitalized psychiatric patients

Potential Effect of Bisphenol A, an Endocrine Disrupting Chemical, on the Progression of Ovarian Cancer Cell Growth in Cellular and Xenograft Mouse Models

Kyung-A Hwang,Kyung-Chul Choi 한국동물생명공학회(구 한국동물번식학회) 2012 발생공학 국제심포지엄 및 학술대회 Vol.2012 No.1