생물막 유동층 반응기에서의 미생물 농도 예측

추석열,서정호,박태주,김동석,송승구 부산대학교 환경문제연구소 1991 環境硏究報 Vol.9 No.-

This experiment was carried out to predict biomass concentration of attacted biofilm and to investigate fluidized-bed biofilm reactor (FBBR) performance of treating high organic loading rate. A number of experiments were conducted by increasing organic loading rate from 10kgCOD/㎥·day to 80kgCOD/㎥·day with superficial upflow velocity, 0.47cm/sec, operationg temperature, 22±1℃ and pH, 7±0.1. Glucose was used as a synthetic substrate. COD removal efficiencies were remarked as 73 to 96%, and the biomass concentration was increased up to 37,000mg/1. Under this experimental conditions, the FBBR was most efficiently operated at the F/M ratio of 1.7 and the biofilm thickness of 420㎛.

해외 진출 섬유/의류기업의 해외사업지식에 관한 탐색적 연구

추호정,최미영 동의대학교 경제경영전략연구소 2011 經濟經營硏究 Vol.6 No.2

This study aims to understand the critical role of foreign business knowledge on the development of market seeking internationalization of Korean textile/apparel firms. Korean textile/apparel firms have focused on production efficiency seeking internationalization in China and other developing countries, while leading foreign firms actively became involved in market seeking international business in these countries. This study proposes the conceptual model of the developmental transition from production efficiency seeking internationalization to market seeking internationalization with the emphasis on the role of foreign business knowledge. Foreign business knowledge is expected to be accumulated from previous experience in the foreign market mostly related to production efficiency seeking activities. Data collected from survey research and in-depth interview are analyzed, and findings are discussed. Finally implication for the industry is discussed.

영구치 치수 기질세포를 이용한 연골 분화 및 분화 시기에 따른 형태학적 변화

정주령,김하나,박열,김민정,오영주,신수정,최윤정,김경호 大韓齒科保存學會 2012 Restorative Dentistry & Endodontics Vol.37 No.1

Objectives: The aim was to confirm the stem cell-like properties of the dental pulp stromal cells and to evaluate the morphologic changes during in vitro chondrogenesis. Materials and Methods: Stromal cells were outgrown from the dental pulp tissue of the premolars. Surface markers were investigated and cell proliferation rate was compared to other mesenchymal stem cells. Multipotency of the pulp cells was confirmed by inducing osteogenesis, adipogenesis and chondrogenesis. The morphologic changes in the chondrogenic pellet during the 21 day of induction were evaluated under light microscope and transmission electron microscope. TUNEL assay was used to evaluate apoptosis within the chondrogenic pellets. Results: Pulp cells were CD90, 105 positive and CD31, 34 negative. They showed similar proliferation rate to other stem cells. Pulp cells differentiated to osteogenic, adipogenic and chondrogenic tissues. During chondrogenesis, 3-dimensional pellet was created with multi-layers, hypertrophic chondrocyte-like cells and cartilage-like extracellular matrix. However, cell morphology became irregular and apoptotic cells were increased after 7 day of chondrogenic induction. Conclusions: Pulp cells indicated mesenchymal stem cell-like characteristics. During the in vitro chondrogenesis, cellular activity was superior during the earlier phase (within 7 day) of differentiation.

미국 거주 한국 소비자의 자민족 중심주의 성향 연구

추호정;Pysarchik, Dawn Thorndike 한양대학교 2004 韓國 生活 科學 硏究 Vol.- No.23

In the current globalizing marketplace, consumers encounter various products with multiple country-of-origins everyday. New terms in international trade such as “captive import”, “transplant” and “hybrid” represent complicated country of origin cues many global products are carrying. To predict consumer behavior in these markets, therefore, it is necessary to understand how consumers use country of origin cues in their purchase decision making processes. Consumer ethnocentrism has been known as one of individual characteristics which determine the effect of country of origin. The primary purpose of this study is the Korean consumers‘ ethnocentric tendency. Specifically, the study compares ethnocentric tendency of Korean consumers in the year of 1995, 1997, and 2000. Also this study examines the relationships between ethnocentrism and demographic factors including age, gender, marital status, and monthly income, product attribute evaluation, quality perception, and purchase intention. The empirical part of the study is conducted with survey data collected from Korean students of a major mid-western university in the US and their family in the year of 1995, 1997, and 2000.The result shows that Korean consumers have stronger ethnocentric tendency in 1997 than in 1995 and 2000, which implies that economic crisis in Korea might stimulate consumers to become more economically conservative. The study confirms previous studies arguing consumers’ demographic factors and ethnocentrism are closely related. Women, married, older, and middle income consumers are likely to have stronger ethnocentric tendencies in Korea. Consumers’ attribute evaluation (design, comfort, and brand image), quality perception, and purchase intention for domestic brand jeans (Nix)and an imported brand jean (Levi) are compared. Consumer ethnocentrism seems to affect purchase intention but not attribute evaluations and quality perception. Consumer Ethnocentrism, Economic Crisis, Demographics, Product Attribute Evaluation, Quality Perception, Purchase Intention

UCC의 유용성 및 즐거움과 UCC전문사이트 태도의 관계

추호정,정선미,김상조 동의대학교 경제경영전략연구소 2010 經濟經營硏究 Vol.5 No.1

In this study, exploring some necessary factors of new emerged UCC site, for achieving the differentiation against the existing web-service company such as the portals, will be the main purpose. To achieving the purpose of this study, the theory research and the quantity research have been done simultaneously. And, the covariance structural equational model was used for verifying the hypothesis. The summary of result is like below. First, It shows that the usefulness and the playfulness, one of the properties of UCC, give mindful influence on formation of intimacy for the site as a intervening variable under the on-line environment as UCC site. Secondly, It shows that while the playfulness of UCC affects the meaningful influence on interaction, the usefulness of UCC does not affects any meaningful influence on interaction. Thirdly, the interaction factor gives a meaningful influence on the intimacy. In other words, higher interaction of users in the current UCC site induces more positive feelings and intimate relationship, which is enough to lead revisiting the sites from users. Fourthly, the intimacy and interaction of the site affect meaningfully for the intention of revisiting of UCC site. Particularly, the intimacy estimate affected double than the interaction for the intention of revisiting of UCC site.

청각 이미지와 의복 이미지의 관련성에 대한 탐색 :성격, 성별,의복관심의 영향을 중심으로

배수정;고진아;박소현;이규혜;추호정 한양대학교 2007 韓國 生活 科學 硏究 Vol.27 No.1

This study exploratory examined the relationship between auditory images and clothing style images of young consumers by their personality types, sex and clothing interest. A questionnaire was developed to measure auditory images, clothing style images, personality types, clothing interest and demographic variables. Scale items were adopted from prior studies on clothing self images and Myers-Briggs Type Indicator (MBTI) known to measure psychological types. 120 undergraduate students with diverse majors were the respondents of the empirical study. MBTI categorized respondents into one of 3 personality types, IFT (Introversion and Thinking or Feeling, n=23), EF (Extroversion and Feeling, n=73) and ET (Extroversion and Thinking, n=24). ANOVA results indicated that, among 13 auditory images measured in the study, rational, self-confident and social images were significantly different across three personality type groups. Overall, ET group showed higher level of the the auditory images. Among clothing style images, social images were significantly different. IET group showed significantly lower level of social images. In addition, respodents' age and level of clothing interest influenced auditory and clothing style images. Correlation coefficients indicated that there were significant relationships between most auditory and clothing style images included in the study except for the self-confident image.

B형 바이러스 감염의 가족내 전염양상

김현정,홍성호,조주연 순천향대학교 교수학습개발센터 2004 Journal of Soonchunhyang Medical Science Vol.10 No.3

Background : It is well known that Korea is and endemic area for viral hepatitis B and reported that the HBsAg positive rate reaches about 7.3% in korea. In this study we investigated intrafamilial spread of hepatitis B Virus infection, because the contact between family members is close. Methods : From January 1995 to August 2002, 104 patients who were diagnosed as hepatitis B in one college hospital in Seoul and their 289 family members were surveyed about HBsAg positive rate of patient's family members according to patient's HBeAg, IgM anti-HBc, liver function and family relation. Results : Cross HBsAg positive rate was 16.96%(49/289). When patient's HBeAg was positive, HBsAg positive rate was 22.14%(29/131), when negative, it was 17.02%(16/94). When patient's IgM anti-HBc was positive, it was 13.04%(6/46), when negative, it was 14.08%(12/81). When patient's liver function was abnormal, HBsAg positive rate was 9.28%(14/151), when normal, it was 23.7%(32/135). According to patient's family relation, HBsAg positive rate was' 8.3% between husband and wife, 1.64% father and son, 2.22% father and daughter, 44% mother and son, 29.64% mother and daughter, 28.57% among brothers and among sisters, 58.33% between brothers and sisters. Conclusion : The HBsAg positive rate in hepatitis B patient's family was 16.96% and higher than that of heathy adult's. In family, the HBsAg positive rate was high between brothers and sisters, mother and son, mother and daughter. According to patient's HBeAg, IgM anti-HBc, and liver function, the HBsAg positive rate was not statistically significant.

동종 조혈모세포이식 후 발생한 크립토콕쿠스 척추염 1예

고윤호,임동준,이성수,조유경,이동건,최정현,김유진,민창기,김동욱,박정미,김춘추,신완식 대한감염학회 2001 감염 Vol.33 No.4

Skeletal cryptococcosis is an uncommon infection. Cryptococcus is a common cause of meningitis and infects 7∼10% of patients with AIDS. As well as AIDS, the infection may be seen in association with leukemia, lymphoma, Hodgkin's disease, sarcoidosis, tuberculosis and diabetes, also in patients on steroid medication. But there is no case report of skeletal cryptococcosis following allogeneic hematopoietic stem cell transplantation. A 40-year-old woman was admitted to the hospital because of low back pain. She had chronic myelogenous leukemia for 2 years and underwent allogeneic hematopoietic stem cell transplantation 8 months ago. She have been treated with steroid and cyclosporine orally because of chronic graft versus host disease. On examination she was afebrile and had posterior lower lumbar tenderness. But, she had no reduced strength of low extremities. Open biopsy was underwent. Histology demonstrated budding, round-to-oval, refractile yeast-like organisms within debris. The results of a lumbar puncture were unremarkable and cerebrospinal fluid culture failed to grow bacteria and yeast. The patient was treated with amphotericin B (1 gram) and AmBisome□ (2.8 gram) over 6 weeks. Three months after cessation of therapy, the patient was doing well.(Korean J Infect Dis 33:298∼301, 2001)

폐기물 성상과 매립방식에 따른 침출수 특성

성낙창,김은호,문추연,김정권,장성호,김수생,박출재 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.1

In this study, we can be obtained the following conclusions about the characteristics of leachate with waste compositions and landfill methods. pH shows a tendency to increase in E. landfill, because NH₃ is created by anaerobic degradation and dissolved in leachate. The concentrations of BOD and COD become different, In case of E. landfill, food of combustible is H. & S. landfill and then SS is high in concentration. According to passed time, T-N is high in concentration, but T-P shows a similar tendency. Heavy metals of leachate is lower than threshold concentrations. If leachate is treated biologically, microbes are not inibitory.

조혈모세포이식 후 발생한 주폐포자층 폐렴에 대한 고찰

주지현,최정현,이동건,백지연,고윤호,이혜정,김세희,신호진,박윤희,박지영,김유진,신완식,김춘추 대한감염학회 2001 감염 Vol.33 No.4

Background : Pneumocytitis cainii pneumonia (PCP) can occur in immunocompromised hosts especially such as AIDS or cancer patients. Although recent research had focused on PCP in AIDS patients, few studies have described the clinical presentations of PCP in recipients of stem cell transplantation (SCT). We evaluated the clinical manifestations of PCP in SCT patients admitted at St. Mary's hospital, Seoul, Korea. Methods : The medical records of 17 PCP patients undergoing SCT between Feb. 1998 and Feb. 2000 were reviewed. The diagnosis of PCP was confirmed through the demonstration of Pneumocytitis cainii via either cytology of brochoalveolar lavage (BAL) or histological technique of lung biopsy. CMV disease and CMV infection were confirmed by BAL culture and antigenemia respectively . Results : Seventeen patients were all recipients of allogeneic SCT and 7 of 17 patients were performed non-sibling SCT. Patients presented with symptoms including brief period (4 ∼23 days) of fever (76%), dyspnea (70%), cough (64%), and signs such as rare(58.8%), Sixteen patients (94%) had been receiving immunosuppressive agent such as cyclosporine A (64%) or Fk506 (35%) without PCP prophylaxis. Eleven patients (64%) were treated with corticosteroid with mean dose of 16 mg/day prednisolone and mean duration of 4.6 months after post-SCT period. Twelve patients were co-infected with CMV. Another co-infected miCroorganisms were Pseudomonas aeruginosa, Mycobacterium tuberculosis, herpes simplex virus, parainfluenza virus, Average duration of treatment with trimethoprim-sulfamethoxazole (TMP/SMX) was 21 ±9 days. Four patients died, and three of them were related with PCP. Conclusion : PCP developed frequently in patients who were taking immunosuppressive drug due to graft versus host disease or were not taking TMP/SMX prophylaxis. High risk patients showing fever, cough, or dyspnea should be considered to take early bronchoscopic intervention for detection of PCP. When treat for PCP, it also be considered to the possibility of coinfection such as CMV. (Korean J Infect Dis 33:273∼279, 2001)