선천성 수정 대혈관 전위의 해부학적 유형 및 동반 심기형에 관한 연구

정해율 全南大醫大 2003 전남의대학술지 Vol.39 No.4

광주시내 업종별 음식점의 위생상태 및 식중독원인 세균의 분포 특성

이홍열,유맹자,정해진,김근영,정희종 全南大學校 農業科學技術硏究所 1998 農業科學技術硏究 Vol.33 No.-

업종별 음식점 주방의 위생상태는 일식>중식>한식의 순이었고 개인위생의 경우는 일식>한식>중식의 순이었는데 주방 및 종업원의 위생상태를 향상시키기 위해서는 음식점 규모의 대형화, 45℃ 이상의 온수공급, 주방시설의 표준화, 위생비닐장갑의 착용, 및 유니폼 착용이 신속하게 이루어져야 할 것이다. 업종별 대중음식점의 주방기구중의 세균분포는 전반적으로 일반세균수가 높게 나타났고 특히 대장균군수가 높게 나타났는데 음식물이 아니고 조리기구이긴 하지만 우리 음식점의 위생상 문제가 많은 것으로 생각된다. 미국 육군 Natick연구소가 제시한 음식물의 미생물 기준한계인 1 ×10??마리 이하, 대장균수가 100마리 이하와 비교할때 일반세균수의 경우는 아주 만족할만한 위생상태로 평가되었으나 대장균수는 개숫물의 경우 업종과 관계없이 높게 나타났고 행주와 칼의 경우 일식음식점에서만 높게 나타났으며 도마의 경우는 모두 100마리 이하로 양호한 위생상태로 평가되었다. 한식 전문음식점간의 세균수가 큰 차이를 보인 것은 규모와 운영방법이 서로 다르기 때문으로 앞으로 한식음식점에 대한 시설 및 환경개선에 대한 노력이 요구되었다. 또한 일식음식점간에는 일반세균수의 분포가 크게 다는 것으로 조사되었는데 특히 개숫물, 행주 및 도마중에 존재하는 미생물수가 크게 차이가 있었다. 등급별 한식음식점의 세균분포는 호텔급 음식점> 일반대중급 음식점> 여관급 음식점의 순으로 나타나 업소규모가 클수록 위생시설 및 위생습관의 수준이 높아 위생상태가 양호한 것으로 분석되었고 여관급음식점의 경우 위생상태가 낮은 것은 이용빈도가 낮은 것이 그 원인이 아닌가 생각되었다. Sanitary evaluation of kitchen area in different types of restaurants was the best at Japanese style restaurants and the worst aat Korean style restaurants. In personal hygiene Japanese style restaurant were evaluated as the best, but Chinese style restaurants were evaluated as the worst. Total and coliform bacterial counts were mostly showed high levels at all types of restaurants and especially this tendency was predominated in coliform counts. As compared to the standards suggested by U.S. Army Natick, however, total bacterial counts in all of supplies were evaluated as the satisfactory state. On the other hand, coliform counts in dish-washing water were much higher than the standard, which were not affected by the types of restaurant, and Japanese style restaurants were higher in wiping cloths and knives, but cutting boards were evaluated as satisfactory state with the counts less than 1.0 ×10².Bacterial counts in Korean style restaurants were greatly different depended on the size or type of restaurant. Total bacterial counts in Japanese style were also different among restaurants, especially in dish-washing water, wiping cloths, and cutting boards. According to the results of the evaluation of Korean style restaurant, bacterial distribution based on the class of restaurants, classified as hotel, motel, and public classes, hotel class restaurants showed lower levels of bacterial counts than public class. This result suggested that the larger and higher classes of restaurants maintained the satisfactory state without potential hazards.

광주시내 업종별 음식점의 주방기구와 관련된 주요 세균 및 이들의 계절별 변화

이홍열,유맹자,정해진,김근영,정희종 全南大學校 農業科學技術硏究所 1998 農業科學技術硏究 Vol.33 No.-

업종별 음식점에서 사용중인 주방기구 가운데 개숫물중에 존재하는 세균들을 분리·동정한 결과, 한색음식점에서 37균주, 일식음식점에서 23균주, 및 중식음식점에서 33균주가 분리되었고 이들 중 한식음식점에서 E. coli 등 16균주, 일식음식점에서 Listeria sp. 등 20균주, 중식음식점에서 Micrococcus sp. 등 15균주를 각각 동정하였다. 이들 세균들은 업종별 음식업소에서 주로 사용되는 색품재료에 존재하는 세균들과 밀접한 관계가 있는 것으로 밝혀졌고 E.coli와 같은 일부 세균들은 주방의 불결한 환경이나 종사자로부터 오염된 것으로 추정되었다. 업종별 음식점에서 사용중인 개숫물, 행주, 칼, 및 도마에 존재하는 세균의 분포는 일반세균수 및 대장균수가 모두 2월에서 8월까지 점점 증가하다가 11월에는 다시 감소하는 경향을 보였다. 특히 이같은 경향은 일반세균은 개숫물에서 대장균군은 칼에서 가장 뚜렷하게 나타났다. 따라서 식중독 발생 가능성이 가장 높은 여름철에는 칼, 도마 등 주방기구들은 정기적으로 열탕소독하는 철저한 위생처리가 필수적인 것으로 생각되었다. Thirty-seven, twenty-three, and thirty-three bacterial strains were isolated from dish-washing water which was selected as a kitchen supply commonly loaded the highest level of bacteria among various supplies using at Korean style, Japanese style, and Chinese style restaurants. Among these isolates, sixteen strains including Esherichia coli, twenty strains including Listeria sp., and fifteen strains including Micrococcus sp. were identified from Korean style, Japanese style, and Chinese style restaurants, respectively. This result suggested that most isolated bacteria were closely related to bacterial flora of raw food materials used in each style of restaurants and others could be contaminated from the surrounding environment and the employees. Total and coliform bacterial counts distributed in dish washing water, wiping cloths, knives, and cutting boards used at different types of restaurants were gradually increased from February to August and then decreased until November. This changing tendencies of total bacterial counts and coliform group counts were obvious in dish-washing water and in knives, respectively. Therefore, kitchen supplies such as wiping cloths, cutting boards, and knives should be treated carefully with hot water of above 45℃ at every certain period of time to kill some of these potential hazardous bacteria and to prevent outbreaking foodborne-illness by them, especially during Summer.

IMT-2000 망에서의 Layered Cell 전송 성능해석 모델

이영교,정해원,최충열,조성준 한국항공대학교 1997 論文集 Vol.35 No.-

본 논문은 ATM 기반의 layered 셀 구조를 적용한 Mobile Trunking에 사용되는 AAL type 2 프로토콜에 대해 설명했다. AAL type 2는 지연에 민감한 어플리케이션에 있어서 길이가 짧고, 패킷 길이가 변동하며, 저속도인 데이터 전송에 대한 대역폭 효율을 제공한다. 본 논문에서는 짧은 길이의 패킷에 대한 프레임 구조와 이를 하나 또는 그 이상의 ATM셀에 다중화 시키는 방식과 전송에러를 복구하는 기능 등에 대해서도 설명했고, 통계적 다중화의 효율, 지연, 채널전송효율 등을 해석하기 위한 큐잉 모델도 제안했다. 그리고, 미니셀 패킷화 지연 및 layered셀로 다중화되는 미니셀의 다중화 효율 등을 산출했고, layered셀 구조를 사용할 경우 예측되는 전송효율을 알아보았다. 여기서 전송속도는 ATM기반의 45Mbps에서 155Mbps사이의 경우를 고려하였다. 전송효율의 관점에서는 layered셀 방식이 고정 길이 셀 방식보다 효율적임을 알 수 있었다. 끝으로, 이를 국내 IMT-2000환경에 적용하기 위한 성능해석 모델과 파라미터를 제시하고 트렁크 용량을 해석했다. In this paper, we explaned the protocol of AAL type 2 used in the Mobile Trunking which has the layered cell structure based on ATM. These AAL type 2 provides the bandwidth-efficient transmission of low-rate, short, and variable length packets in delay sensitive applications. This paper covers the frame structure of the short legnth packets, the packing of those into one(or more) ATM cells, and the mechanisms to recover from transmission errors. Also, we proposed queueing model to analyse the efficiency of statistical multiplexing, delay time, channel transmission efficiency. And we calculated short cell packetization delay and short cell multiplexing into layered cells, and measured transmission efficiency to predict the layered cell structure schemes. Here we set the transmission line speed(trunking) at the between 45Mbps to 155Mbps, which are the future services bsed on ATM. From the viewpoint of transmision efficiency, layered cell shcemes is revealed to be more useful than fixed length cell schemes. Finally, we applied the proposed queueing model to the domestic IMT-2000 systems and we analysed the performance of trunk capacity.

人蔘이 自然發生高血壓쥐에 있어서 血壓 및 血漿 Renin 活性度에 미치는 影響에 關한 實驗的 硏究

孫宜錫,朴陞哲,許鳳烈,李禎均,林憲吉,咸駿洙,梁忠模,韓哲洙,朴贊雄,金海中 대한의학협회 1979 대한의학협회지 Vol.22 No.9

Acute Appendicitis in Henoch-Schonlein Purpura :A Case Report

Hae Yul Chung,김찬종,So Youn Kim,김영옥,류성엽,Jae Hun Chung,김정철 대한의학회 2005 Journal of Korean medical science Vol.20 No.5

Common complications of Henoch-Schonlein purpura (HSP) that lead to surgical intervention include intussusception, perforation, necrosis, and massive gastrointesti-nal bleeding. Acute appendicitis is rarely seen as a complication of HSP. A seven-year- old boy was admitted for arthralgia, abdominal pain, hematochezia, melena, and purpuric rash on the lower extremities. On admission day abdominal ultrasono-graphy was normal, but on day 5, he became pyrexial and developed right iliac fossa pain and tenderness with guarding. Ultrasonography showed distended appendix surrounded by hyperechoic inflamed fat. On exploration an acutely inflamed, necrotic appendix was removed and grossly there was an appendiceal perforation in the appendiceal tip. Microscopically some of the small blood vessels in the submucosa showed fibrinoid necrosis with neutrophilic infiltrations. The authors report the case of a child who developed acute perforative appendicitis requiring appendectomy while on treatment for HSP.

Physiology and Biochemistry : A P Element-Induced Expression and Analysis of α-Glycerophosphate Dehydrogenase (α GPDH) Transformants in Drosophila melanogaster

( Hae Jin Chung ),( Xu Ming Zhe ),( Piao Mei Zi ),( Bo Na Han ),( Doo Sang Park ),( Jang Yul Kwak ),( Ho Yong Park ) 한국응용곤충학회 2003 Journal of Asia-Pacific Entomology Vol.6 No.2

Effects of prestretch on stress relaxation and permanent deformation of orthodontic synthetic elastomeric chains

Jee Hae Chang,Chung-Ju Hwang,Kyung-Ho Kim,Jung-Yul Cha,Kwang-Mahn Kim,Hyung Seog Yu 대한치과교정학회 2018 대한치과교정학회지 Vol.48 No.6

Objective: This study was performed to investigate an appropriate degree of prestretch for orthodontic synthetic elastomeric chains focusing on time-dependent viscoelastic properties. Methods: Orthodontic synthetic elastomeric chains of two brands were prestretched to 50, 100, 150, and 200% of the original length in one and three cycles, and the hysteresis areas of the obtained stress-strain curves were determined. Acrylic plates were employed to maintain constant strain during the experiment. A total of 180 samples were classified into nine groups according to brand, and their stresses and permanent deformations were measured immediately after prestretch (0 hour), after 1 hour and 24 hours, and after 1, 2, 3, 4, 5, 6, 7, and 8 weeks. The relationship between stress relaxation and permanent deformation was investigated for various degrees of prestretch, and the estimated stress resulting from tooth movement was calculated. Results: The degree of prestretch and the stress relaxation ratio exhibited a strong negative correlation, whereas no correlation was found between the degree of prestretch and the average normalized permanent strain. The maximal estimated stress was observed when prestretch was performed in three cycles to 200% of the original length. Conclusions: Although prestretch benefited residual stress, it did not exhibit negative effects such as permanent deformation. The maximal estimated stress was observed at the maximal prestretch, but the difference between prestretch and control groups decreased with time. In general, higher residual stresses were observed for product B than for product A, but this difference was not clinically significant.

알코올 의존에서 Catalase 유전자 다형성의 연합 연구

이해원(Hae-Won Lee),오동열(Dong-Yul Oh),홍미숙(Mee-Sook Hong),정주호Joo-Ho Chung),김종우(Jong-Woo Kim) 한국중독정신의학회 2003 중독정신의학 Vol.7 No.2

Objective:There is increasing evidence that free radicalmediated CNS neuronal dysfunction is involved in the pathophysiology of alcoholics. This study was performed to examine the relationship between antioxidant defense system and alcoholics by analyzing polymorphism of catalase gene, an antioxidant enzyme. Method:Genotype and allele frequencies in promoter region in the catalase gene using restriction fragment length polymorphism were studied between 117 Korean controls and 94 Korean alcoholics. Results:No difference was found between the alcohol dependent patients and the controls in genotype and allele frequencies of HinfI polymorphism in the catalase gene. However, significant difference was found between the alcohol dependent patients whose age of first drinking are 18 years old or less and the normal controls in the genotype and allele frequency. Conclusions:The results do not support an association between polymorphism of catalase gene and alcoholics. However, it is suggested that HinfI polymorphism in the catalase gene could be associated with early age of first drinking in alcoholics.

數種疾患에 있어서의 白血球 Alkaline phosphatase 活性度에 關한 硏究

이해선,정상열,고윤웅,한지숙,이주형,채응석 최신의학사 1975 最新醫學 Vol.18 No.8

The value of leukocyte alkaline phosphatase (LAP) activity as an aid in the diagnosis of certain hematologic diseases is now well established. The LAP assessment is particularly valuable in differentiating chronic myelogenous leukemia from leukemoid reactions, polycythemia vera from secondary polycythemias, as well as bacterial infections from non-bacterial infections. However, knowledge of the significance of variations of the levels in LAP activity is limited and the functions of this enzyme in neutrophils are not known. This report describes the LAP activity in normal Koreans and in patients with several diseases such as pulmonary tuberculosis, liver cirrhosis, primary hepatoma, infectious hepatitis, liver abscess, pyogenic infections, and salmonellosis. The results obtained are as follows: 1. LAP activity in normal Korean was 17.2+1.5 (M±S. E.) with range of 3-37. 2. LAP activity was markedly elevated in patients with liver abscess and pyogenic infections. 3. LAP activity in patients with pulmonary tuberculosis and salmonellosis was moderately increased, and slightly increased in patients with liver cirrhosis and primary hepatoma. But it was normal in patients with infectious hepatitis. 4. There was no relationship between LAP activity and serum alkaline phosphatase and leukocyte count. 5. LAP activity was decreased with reduction of leukocyte count in patients with pyogenic infections on the antibiotic treatment, but there was no definite correlationship.