Biofilter modeling integrated with Lim’s adsorption model

Eun Ju LEE,Wui Sook JEON,Hye Min YOON,Hye Jin SONG,Byeung Soo KIM,Hee Jeong KIM,Eun Jeong OH,Kwang-Hee LIM 한국생물공학회 2011 한국생물공학회 학술대회 Vol.2011 No.10

Biofilter Modeling for Waste Air Treatment : Comparisons of Inherent Characteristics of Biofilter Models

Lim, Kwang-Hee,Lee, Eun Ju 한국화학공학회 2003 Korean Journal of Chemical Engineering Vol.20 No.2

The types of biofilter modeling may be primarily classified in accordance with whethef a biofilm is differentiated from other phases in each model. It may be a secondary classification with regard to biofilter-modeling whether sorption volume and / or adsorption are adopted as reservoirs or not. Thirdly, biofilter models are classified as to whether adsorption is assumed to exist through gas phase and / or a biofilm. Among all the biofilter-models of previous investigators all model-components including gas phase, a biofilm, sorption volume and adsorption surface are considered only in the model of Lim. Since his model does not require a numerical solution to describe the concentration of organic pollutants in waste-ari-streams along the height of a biofilter even under unsteady-state conditions, it satisfies the condition of simplicity that is one of the important model requirements. In spite of its simplicity, Lim's model predictions are fairly good to fit Hodge and Devinny's experimental data.

광장공포증 유무에 따른 공황장애 환자의 공존병리와 증상 심각도의 비교 연구

임경희,장은진,김정범 대한생물치료정신의학회 2002 생물치료정신의학 Vol.8 No.2

연구목적 : 본 연구에서는 광장공포증을 동반하지 않은 공황장애 환자들(이하 비광장공포증군)과 광장공포증을 동반한 공황장애 환자들(이하 광장공포증군)의 공존병리와 증상의 심각도를 조사하여 두 질환의 본질을 규명하고 치료계획을 세우는데 도움을 얻고자 한다. 방 법 : 연구대상은 1998년 3월부터 2001년 7월까지 계명대학교 동산의료원 정신과에서 외래치료를 받아온 환자들로 비광장공포증군 26명, 광장공포증군 44명으로 구성된 총 70명이다. 평가도구는 9개의 증상차원을 평가하는 90문항으로 구성된 간이정신진단검사(SCL-90-R)와 공황장애의 필수적이고 전반적인 7가지 영역의 심각도를 평가하는 한국판 공황장애 심각도 척도를 사용하였다. 통계적 분석은 ANOVA, Chi-square test, student t-test, person correlaiton을 시행하였고, 통계적 유의수준은 p<.05로 하였다. 결 과 : 1) 광장공포증군의 광장공포증적 두려움과 회피의 정도는 경도에서 중등도 사이에 해당되는 것으로 나타났다(PDSS점수 : 1.46±0.94). 2) 인구통계학적 특성에 대해 광장공포증군과 비광장공포증군을 비교해 보면, 연령, 성별, 교육정도, 직업유무, 병력, 발병연령에서는 두 집단 간에 유의한 차이가 없었다(표 1). 3) 세 집단의 공존병리의 유형을 분석해 본 결과, 광장공포증군은 모든 증상차원에서 정상대조군 집단보다 유의하게 높은 점수를 얻었다. 비광장공포증군은 불안, 공포불안, 정신증 척도에서 정상대조군 집단 보다 유의하게 높은 점수를 얻었다(표2). 4) 광장공포증군은 비광장공포증군에 비해 신체화, 강박증, 적대감, 공포불안, 편집증척도에서 유의하게 높은 점수를 보였다(표 2). 5) 광장공포증군과 비광장공포증군의 심각도 비교에서는 내적감응적 두려움과 회피, 직무수행의 장해/고통, 사회적 기능의 장해/고통에서는 두 집단 간에 유의한 차이를 보이지 않았느아, 심각도 총점, 복합점수, 공황발작의 빈도, 공황발작 동안의 고통, 예기불안, 광장공포증적 두려움과 회피에서는 광장공포증군이 비광장공포증군에 비해 유의하게 높은 점수를 보였다(표 3). 6) 광장공포증군내에서 광장공포증적 두려움과 회피항목은 SCL-90-R의 정신증 척도를 제외한 신체화, 강박증, 대인민감성, 우울, 불안, 적대감, 공포불안, 편집증 척도와 유의한 정적상관관계를 보였다(표 4). 결 론 : 광장공포증군이 비광장공포증군에 비해 대부분의 필수증상의 심각도가 높을 뿐만 아니라 더 다양한 공존병리를 가지고 있음이 밝혀져 기본적으로 더 심한 질환임이 시사된다. 따라서 공황장애의 치료와 평가에 있어서 공존병리와 증상의 심각도를 함께 고려하고 공황장애에서 광장공포증이 동반되는 경우 이에 대한 더 적극적이고 집중적인 치료가 필요하겠다. Objectives : In this research comorbidity and severity of symptom of patients that have panic disorder without agoraphobia(PD) and with agoraphobia(PDA) were examined in order to study their nature more closely and also to help set up therapy plans. Method : 70 patients were diagnosed with PD(N=26) and PDA(N=44) by DSM-Ⅳ. SCL-90-R was administered to panic subjects and normal control subjects. PDSS were administered to panic subjects, the statistical analysis was conducted using ANOVA, Chi-square test, student t-test, Pearson Correlation analysis. statistical signifi-cance was p<.05. Results : 1) The degree of agoraphobic fear/avoidance of PDA indicated the level to from moderate(PDSS score 1.46 0.94). 2) There was no significant difference between the two groups(PD/PDA) in there sex, age, education level, occupation, duration of illness, onset of age. 3) After analyzing the comorbidity pattern of the three groups, PDA was significantly higher score than normal control group in all symptom level. PD had higher score than normal control groups in anxiety, phobic anxiety and psychotism. 4) PDA showed much a significantly higher score in Somaatization, Obsessive-Compulsive, Hostility, Phobic Anxiety, Paranoid Ideation when compared to PD. 5) There was no significant difference between the two groups(PD/PDA) in there interoceptive fear/avoidance, PDA had significantly higher scores than PD. 6) The agoraphobic fear/avoidance item within PDA had significant correlation with Somatization, Obsessive-Compulsive, Interpersonal Sensitivity, Depression, Anxiety, Hostility, Phobic Anxiety, Paranoid Idation except significant correlation with psychoticism. Conclusion : As it is shown clearly in all the results, PDA had a higher level of severity than PD. It was also clarified that PDA had a variety of comorbidity. Therefore when evaluating the treatment of Panic Disorder, One has to consider the comorbidity and severity. A more positively and concentrated treatment will be needed when panic disorder is accompanied by agoraphobia.

RDB환경에서 테이블 변경에 따른 유지보수용 도구인 MATTAC의 개발에 관한 연구

임은기,이정희 金烏工科大學校 1997 論文集 Vol.18 No.-

We develop a Maintenance Tool for Table Change (MATTAC) under RDB environment. Our tool finds positions to be updated in 4GL programs and reports them when Tables of current DB are changed. We design efficient algorithms for finding positions affected by those changes by using Finite Automata, and implement it using C language on Sun Workstation. MATTAC consists of 4 portable components, so it can be easily implemented for other systems.

공동주택 주호 내부구성재의 내용연한 및 수선주기 설정연구

임석호,황은경,이강희,김수암 대한건축학회 2003 대한건축학회논문집 Vol.19 No.3

In case of an apartment house, the application of LC(Life Circle) design that considers remodeling and reconstruction when the a house reaches a certain time after its erection needs to be reviewed for longevity from time series life perspectives that set up a period of durability for components and maintains and improves their performances through systematic replacement and repair. Apartment houses are constructed with parts of different sizes and life. It is important to manufacture materials and components with high durability. However, more importantly, well-thought-out and systematic plans are needed between parts with a space module and a life module and construction space. Hence, this research sought to investigation of the expected service life of parts or members according to repair or replacement cycles with social and functional aspects, considering the establishment of housing parts hierarchy through the analysis of expected service life. Consequently, the establishment of the repair cycle and estimation of the service life of housing parts have the remodeling in place in the frontline construction business and cut cost on remodeling, thus activating remodeling.

실험실적 당뇨성 흰쥐에서 acetaminophen의 대사에 관한 연구

임은주,윤병재,윤병재,조희숙,김대재,최종원 경성대학교 환경문제연구소 2000 環境硏報 Vol.10 No.1

Acetaminophen is one of the most important drugs used for the treatment of mild to moderate pain when an anti-inflammatory effect is not necessary. Phenacetin, a prodrug that is metabolized to acetaminophen, is more toxic than its active metabolite and has no rational indications. In this study, we were observed activities of free radical generating enzymes, free radical scavenging enzymes and glutathione-related enzymes as well as detoxification mechanism of against acetaminophen-induced hepatotoxicity in STZ-induced hyperglycemic rat. Activities of cytochrome p450, cytochrome b5, aminopyrine demethylase and aniline hydroxylase were changed by the treatment acetaminophen in hyperglycemic rats. It was also observed that activities of conjugating enzymes as sulfotransferase and UDP-glucuronyltransferase was slightly changes against acetaminophen-induced in hyperglycemic rats. Acetaminophen results in the significantly decrease in the level of hepatic glutathione concentration and √-glutamylcysteon, synthetase activities in hyperglycemic rats. And, glutathine S-transferase, superoxide dismutase and glutathione peroxidase activities were significantly increased against acetaminophen-inducedas in hyperglycemic rats. Glutathione reductase and catalase were not affected for experimental state. Furthemore, acetaminophen highered serum alanine, aspartate aminotransferase, sorbitol dehydrogenase, √-glutamylpeptidase, alkaline phosphatase and lactate dehydrogenase activities in hyperglycemic rats. Key Words: Hepatotoxicity, D/M, Acetaminophen, Glutathione, Glutathlone S-transferase, √-glutamylcystein synthetase

결정 성장 방법에서 황산 농도가 황산 칼슘 결정 형태 및 법랑질과 복합 레진의 결합 강도에 미치는 영향

은희춘,구기갑,임호남 대한치과기재학회 1999 대한치과재료학회지 Vol.26 No.1

The calcium sulfate dihydrate(gypsum) crystal morphology on enamel surface treated by sulfuric acid aqueous solution (from 0.1M to 1.0M) was observed by scanning electron microscope. The shear bond strength between enamel and composite resin was measured by universal testing machine. From the experimental results, the conclusions of this study were; (1) The shear bond strength between enamel and composite resin was maximum at 0.1M sulfuric acid. The shear bond strength was decreased to 0.3M, hardly bonded from 0.4M to 0.6M, and increased from 0.7M as increasing sulfuric acid concentration. (2) The crystals was disordered as increasing sulfuric acid concentration. (3) The crystals formed by sulfuric acid aqueous solution were not firmly bonded on enamel surface because only crystal nuclei were attached on enamel, so fracture was occurred between enamel and crystal interface.

대전대학교 학생의 음료섭취 실태 조사

임영희,박명순,정은영 대전대학교 생활과학연구소 1999 생활과학연구 Vol.5 No.-

The purpose of this study was to investigate beverage consumptions of students at Taejon University. This survey was carried out through questionnaires, and subjects were 265 students(110 males and 155 females) between June 9-24, 1999. All statistical data analysis were conducted using the SPSS/PC+. The results of this studies are follows. 1. Mean height of male and female students were 173.4㎝, 161.2㎝ and the mean body weight of those were 64.3㎏, 51.7㎏, respectively. 2. BMIs of male and female students were 21.4, 19.9, respectively. According to BMI underweight subjects were 24.2%, normal and overweight subjects were 67.2%, 8.7%, respectively. Also only 51.3% of the subjects correctly self judged their weight. 3. The preferred beverage were water(3.17), coke(3.06), coffee(2.94), milk (2.75) for male students, and water(3.02), milk(2.75), coke(2.63), coffee(2.63) for female students. 4. The criterion of choosing beverage was taste(58.1%), effects(13.2%), materials(12.1%), prices(10.9%). 5. Coffee was significant positive correlation between frequency of eating out and smoking, coke was frequency of snack and smoking.

소금으로 팽화시킨 유과바탕 및 쌀엿강정용 팽화쌀의 저장 중 품질 변화

임경려,이경희,곽은정,이영순 한국조리과학회 2004 한국식품조리과학회지 Vol.20 No.5

This study was carried out to improve the qualities and extend the shelf life ot Yukwa and Salyeotgangjung. traditional Korean cookies, using tine hot salt instead of oil as the popping medium. The Yukwa and Salyeotgangjtmg that had been popped using tine salt were stored at 25?for one or two months, and then compared their sensory evaluation, lipid contents and acid and peroxide values with those popped in oil. In the sensory test, the Yukwa base and popped rice expanded in the salts and stored for one month were preferred to those expanded in oil with regard to flavor and overall acceptability. With respect to the whiteness, off-flavor, and crispness, these properties those expanded in salt had stronger whiteness and crispness but a weaker off-flavor compared to those expanded in oil. The lipid contents of the Yukwa base and popped rice expanded in oil were 37.73 and 49.65%, respectively, which were significantly higher than in those expanded in salts (0.10 and 0.53%, respectively). The acid and peroxide values were larger in those expanded oil than in salts after 8 weeks storage. In view of the above results, the conclusion was reached that the Yukwa base and popped rice expanded in salts were less likely to provide a calorie intake and to become rancid over a long storage time.

MgO-Al₂O₃-SiO₂계 요업원료(Mullite,Spinel,Cordierite)의 제조 및 소결특성 : Ⅲ. 알콕사이드 졸-겔법에 의한 코디어라이트 미분말의 합성 Ⅲ.Preparation of Cordierite Fine Powder by an Alkoxide Sol-Gel Process

이홍림,김세기,이온영,정원도,김창은,이희수 연세대학교 산업기술연구소 1989 논문집 Vol.21 No.1

The gel powder of cordierite composition was prepared from Mg(NO₃)₂6H₂O, Al[ OCHCH₂(CH₃)₂] ₃ and Si(OC ₂??)₄ as sources of Mg, Al and Si-components, using isopropyl alcohol al a solvent and NH₄OH as a catalyst. Due to the difference of hydrolysis rates between Si(OC₂??)₄ and Al[ OCHCH₂(CH₃)₂]₃, the small amount of spinel was formed besides the main phase, cordierite, after clacining. At 900 ℃, μ-cordierite, the low temperature metastable form, was appeared but transformed to α-phase, the high stable form, when calcined at 1100 ℃ for 2h. The specific surface area and mean particle size of powder calcined at 600 ℃ for 2h were 62m²/g and 0.552μm, respectively. However, when acetylacetone was added to Al [OCHCH₂(CH₃)₂]₃ as a stabilizer, the transformation temperature was lowered about 80 ℃. The powder calcined at 600℃ was more porous than the former, resulting the specific surface area and mean particle size of the power to be 236 m²/g and 0.724μ m, respectively.