어류 병원세균, Listonella anguillarum에 대한 Pseudomonas aeruginosa MB I-3의 항균 효과

이수정,윤이나,김진도,이정식,김은희,Lee, Su-Jung,Youn, I Na,Kim, Jin-Do,Lee, Jung Sick,Kim, Eunheui 한국어병학회 2014 한국어병학회지 Vol.27 No.1

질병 치료를 위하여 사용되는 항균제는 효과적이고 사용이 편리한 장점이 있지만, 내성균 발생이나 항균물질 잔류와 같은 문제점들을 안고 있다. 따라서 어류 질병 치료 및 예방을 위해 어류와 인체에 안전한 생약제 개발과 함께 어류 질병 원인균의 과다 발생을 억제하며 어체의 건강을 유지시키기 위하여 유용 균주를 이용하고자 하는 연구가 다양하게 진행되고 있다. 본 연구는 이전 연구에서 분리되어 Listonella anguillarum에 대하여 생장 억제효과가 있는 것으로 밝혀진 Pseudomonas aeruginosa MB I-3 (MB I-3)를 이용하여 넙치의 비브리오병에 대한 생물학적 방제효과를 검토하였다. Double layered plate assay와 co-culture을 통하여 MB I-3의 L. anguillarum에 대한 생장 억제능력을 조사하였고, MB I-3 균주 배양액을 ethyl acetate로 추출하여 disk 확산법으로 추출물의 항균 효과를 확인하였다. 액체 및 고체 배양에서 생장이 억제된 L. anguillarum을 전자현미경으로 관찰하였으며, 넙치 치어 사육 수조에 L. anguillarum과 MB I-3 균주를 동시에 첨가하여 폐사율을 비교하였다. MB I-3는 8종의 병원성 비브리오균에 대하여 항균력을 나타내었으며, 96시간 동안 실시한 co-culture에서 L. anguillarum은 배양 후 9시간까지 생장 증가를 보였으나, 그 후 감소하는 경향을 보였다. 한편 MB I-3 배양액 추출물 또한 L. anguillarum에 항균활성을 보여 항균 물질이 ethyl acetate로 추출됨을 알 수 있었다. 전자현미경 관찰에서 L. anguillarum은 세포질의 밀도 감소 및 세포막의 swelling에 의한 세포 용해 현상을 보였다. 한편 MB I-3를 L. anguillarum과 함께 투여한 넙치 치어는 대조군에 비해 누적 폐사율이 약 20% 감소되는 결과를 보였으므로, MB I-3를 이용한 수산용 probiotics 개발 가능성을 시사하였다. To study the possible use of probiotics in fish farming, The in vitro and in vivo antibacterial effects of Pseudomonas aeruginosa MB I-3 (MB I-3) against the fish pathogenic bacterium Listonella anguillarum were evaluated. The inhibitory effects of MB I-3 against vibrios were investigated by the double layer method and the co-culture. The results showed that MB I-3 inhibited the growth of pathogenic vibrios including Listonella anguillarum, Vibrio alginolyticus, Vibrio cholerae, Vibrio fluvialis, Vibrio furnissii, Vibrio harveyi, Vibrio parahaemolyticus and Vibrio vulnificus. Extracellular substances obtained from the cultural supernatant of MB I-3 by ethyl acetate extraction showed inhibitory effects on L. anguillarum. The antibacterial substance of MB I-3 was evaluated to destroy the cell membrane of L. anguillarum in electron micrographs. The probiotic effects of MB I-3 was tested by exposing olive flounder (Paralichthys olivaceus) fry to L. anguillarum with or without MB I-3. The cumulative mortality of olive flounder fry infected with L. anguillarum was 24% in the group with MB I-3, while it was 46% in the control group without MB I-3. These results indicate that MB I-3 has potential applications as a probiotic for the control of fish pathogenic vibrios in fish rearing system.

Increased Readmission Risk and Healthcare Cost for Delirium Patients without Immediate Hospitalization in the Emergency Department

I Chun Ma,Kao Chin Chen,Wei Tseng Chen,Hsin Chun Tsai,Chien-Chou Su,Ru-Band Lu,Po See Chen,Wei Hung Chang,Yen Kuang Yang 대한정신약물학회 2018 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.16 No.4

Objective: Hospitalization of patients with delirium after visiting the emergency department (ED) is often required. However, the readmission risk after discharge from the ED should also be considered. This study aimed to explore whether (i) immediate hospitalization influences the readmission risk of patients with delirium; (ii) the readmission risk is affected by various risk factors; and (iii) the healthcare cost differs between groups within 28 days of the first ED visit. Methods: Using the National Health Insurance Research Database, the data of 2,780 subjects presenting with delirium at an ED visit from 2000 to 2008 were examined. The readmission risks of the groups of patients (i.e., patients who were and were not admitted within 24 hours of an ED visit) within 28 days were compared, and the effects of the severities of different comorbidities (using Charlson’s comorbidity index, CCI), age, gender, diagnosis and differences in medical healthcare cost were analyzed. Results: Patients without immediate hospitalization had a higher risk of readmission within 3, 7, 14, or 28 days of discharge from the ED, especially subjects with more severe comorbidities (CCI≥3) or older patients (≥65 years). Subjects with more severe comorbidities or older subjects who were not admitted immediately also incurred a greater healthcare cost for re-hospitalization within the 28-day follow-up period. Conclusion: Patients with delirium with a higher CCI or of a greater age should be carefully considered for immediate hospitalization from ED for further examination in order to reduce the risk of re-hospitalization and cost of healthcare.

Switchable redox activity by proton fuelled DNA nano-machines

Shin, Su Ryon,Lee, Chang Kee,Lee, Sun Hee,Kim, Sun I.,Spinks, Geoffrey M.,Wallace, Gordon G.,So, Insuk,Jeong, Ju-Hong,Kang, Tong Mook,Kim, Seon Royal Society of Chemistry 2009 Chemical communications Vol.2009 No.10

<P>The switching electrochemical property of an SWNT/DNA hybrid can be produced through reversible conformational changes between the closed and open state originating from the pH-responding i-motif DNA which significantly improves its molecular switching and stability by hydrophobic interactions with SWNTs.</P> <P>Graphic Abstract</P><P>The switching electrochemical property of an SWNT/DNA hybrid can be produced through reversible conformational changes between the closed and open state originating from the pH-responding i-motif DNA which significantly improves its molecular switching and stability by hydrophobic interactions with SWNTs. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b820634a'> </P>

企業어음 電子化의 法的 基盤에 관한 硏究

김이수(Kim I-Su) 부산대학교 법학연구소 2007 법학연구 Vol.47 No.2

실물 형태의 기업어음을 발행할 경우 실물을 사용하여 발행하기 때문에 비용이 많이 들고, 운반 및 보관 등에서 분실위험 등이 존재한다. 또한 발행자의 기업어음 발행내역을 통일적으로 관리하기 위한 시스템이 구축되기 어렵기 때문에 발행정보의 투명성도 취약하다. 이러한 문제점을 해결하려면 기업어음을 전자화하여 실물의 발행이 필요없게 하는 대신 일정한 기관에 의하여 그 발행, 양도, 행사를 주관하도록 하는 것이 타당하다. 나아가 기업어음이 기업들에게 단기자금 조달을 위한 효과적 금융상품으로 기능하기 위해서는 거래일 결제의 확보, 증권및대금동시이행(DVP)의 확보, 분할양도를 통한 매수기반의 확충 등이 필요하다. 따라서 기업어음의 전자화 방안은 이러한 요청을 모두 만족시키는 것이어야 한다. 전자어음법에 기초한 전자문서방식이나 대체결제제도에 기초한 전자등록방식 모두 실물의 발행을 폐지하고 발행정보를 확보, 공시할 수 있다는 점에서 차이가 없으나 거래일 결제확보, DVP확보, 분할양도의 실현이라는 측면에서 전자등록방식이 보다 확실하고, 간편하다고 판단된다. 따라서 실물 기업어음은 전자등록방식에 의하여 무권화되어야 한다. Commercial paper plays an important role in raising short-term capital by businesses in most developed countries, including Korea. Traditionally commercial paper has taken a form of promissory note from its introduction. But recently a few problems regarding commercial paper are presented by both commentators and practitioners, i.e. the cost of issuing physical note, risk of custody and delivery, lack of transparency of issuing data, difficulty in realizing T+0 and DVP settlement, shortage of transferability generated by denying conveyance of less than entire commercial paper. In Korea, two legal systems, or a electronic note system and a book entry only system, may come into consideration as a legal tool to solve above mentioned issues. After assessing pros and cons of each system for curing defects of physical commercial paper, the author shows better way to achieve a more attractive and cost-saving, reliable commercial paper system.

비알코올성 지방간의 중증도에 따른 혈중 Ghrelin 농도 변화

유태우 ( Tae Woo Yoo ),조용균 ( Yong Kyun Cho ),강문수 ( Mun Su Kang ),오세용 ( Se Yong Oh ),박정호 ( Jung Ho Park ),김홍주 ( Hong Joo Kim ),박동일 ( Dong Il Park ),손정일 ( Chong Il Sohn ),전우규 ( Woo Kyu Jeon ),김병익 ( Byung I 대한내과학회 2006 대한내과학회지 Vol.71 No.1

목적: ghrelin은 주로 위에서 분비되는 새로운 peptide로서 음식물 섭취 및 식욕을 증가시키고 최근 인슐린 저항성 및 대사 증후군과의 관련성에 대해 많은 연구 결과가 보고되고 있다. 비알코올성 지방간은 인슐린 저항성 및 대사 증후군이 그 원인으로 잘 알려져 있는바 저자들은 비알코올성 지방간의 중증도에 따른 혈중 ghrelin 농도의 변화를 관찰하여 그들의 관련성에 대해 알아 보고자 하였다. 방법: 정상 성인 남성 65명(나이: 54.3±6.3세, 범위 42~70세)을 대상으로 하여 간 초음파 및 공복 혈중 ghrelin 농도를 측정하였다. 간 초음파 소견상 지방간의 유무 및 중증도에 따라 대상자를 세 군(Group I: 정상 27명, Group II: 경증: 24명, Group III: 중등도 이상의 지방간: 14명)으로 분류하였고, 세 군 간의 혈중 ghrelin 농도의 차이를 ANOVA test로 검정하였다. 또한 인슐린 저항성 지표인 HOMA 및 체질량 지수, 허리 둘레, 엉덩이 둘레, 허리-엉덩이 둘레비 등 인슐린 저항성 관련 인자와 혈중 ghrelin 농도와의 독립적인 상관성을 다중 회귀 분석으로 검정하였다. 결과: 간 초음파 소견상 지방간의 정도가 심해짐에 따라 혈중 ghrelin 농도가 낮아지는 경향을 보였으나 (Group I: 정상 230.9±94.3, Group II: 경증 195.2±97.2, Group III: 중등도 이상 지방간 164.3±71.4 pmol/L) 통계적으로 의미있는 결과를 얻지는 못하였으며(p=0.081), 인슐린 저항성 지표인 HOMA 및 체질량 지수, 허리 둘레, 엉덩이 둘레, 허리-엉덩이 둘레비 등 인슐린 저항성 관련 인자는 혈중 ghrelin 농도와 독립적인 관련성을 관찰할 수 없었다. 결론: 본 연구의 결과로 인슐린 저항성과 혈중 ghrelin 농도의 관련성을 증명하지는 못하였다. 하지만 간 초음파 소견상 지방간의 중증도가 심해질수록 혈중 ghrelin 농도가 낮아지는 경향을 관찰할 수 있었다. 따라서 향후 추가적인 연구로 이들의 관련성에 대한 증명이 필요할 것으로 생각한다. Background: Recently, ghrelin has been reported to be associated with insulin resistance. Nonalcoholic fatty liver disease (NAFLD) is a condition in which insulin resistance relatively plays a pivotal role. The aim of this study was to evaluate the change of serum ghrelin concentration according to severity of hepatosteatosis. Methods: Sixty five apparently normal male adults who underwent health screen examinations were classified into three groups, Group I: normal (27 subjects), Group II: mild (24 subjects) and Group III: moderate to severe fatty liver (14 subjects), according to ultrasonographic findings of liver. We analyzed the association between serum ghrelin concentration and severity of hepatosteatosis by ANOVA test. And the independent correlation between serum ghrelin concentration and insulin resistance related factors, HOMA (homeostatic model assessment), BMI (body mass index), WC (waist circumference), HC (hip circumference), WHR (waist to hip circumference ratio) were analyzed by multiple linear regression analysis. Results: Serum ghrelin concentration tended to decrease according to severity of hepatosteatosis (Group I: 230.9±94.3, Group II: 195.2±97.2, Group III: 164.3±71.4 pmol/L). But this was statistically insignificant (p=0.081). The independent correlation between serum ghrelin concentration and insulin resistance related factors were not observed. Conclusions: Our study did not prove the correlation between insulin resistance related factors and serum ghrelin concentration in NAFLD according to severity of hepatosteatosis. However, we found a tendency to decrease serum ghrelin concentration according to severity of hepatosteatosis. So, further studies are required for certification these correlations.(Korean J Med 71:45-51, 2006)

악교정 수술 후 발생하는 신경회복에 대한 연구Ⅰ

이동근,조이수,민승기,오승환,정창주,이은택 대한악안면성형재건외과학회 2001 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.2

Dysfunction of the inferior alveolar nerve indicated by various degree of numbness of the lower lip and chin is one of the few drawbacks of mandibular osteotomy, especially Bilateral Sagittal Split Ramus Osteotomy(BSSRO) and genioplasty. Although it has been recorded throughout the history of this techniques, it is true etiology poorly understood. In this study, 22 consecutive patients under class III malocclusiion impression and undergoing orthognathic surgery(BSSRO only 11 case, BSSRO with genioplasty 11 case) were studied using 4 neurosensory test(static light touch, directional discrimination, two-point discrimination, pin pressure nociception) with post OP 1 week, 2 weeks,4 weeks, 8 weeks, 12 weeks, 24 weeks, On control group, 10 members without trauma and nerve damage history, nerve test was accomplished. We concluded majority of patients return of sensation during post operative 24 weeks. Althought immediate nerve deficit are 92.2%, 97.2% 88.9% these are recovered to 25%, 35.72%, 10.71% at 24 weeks. Nerve recovery rate increased prominently between post 4 weeks and 8 weeks. There is no statistically difference about neurosensory deficit among the chin area. Neurosensory deficit more severe when the BSSRO with genioplasty group than the only BSSRO group. Immediate neurosensory deficit is larger left side than right side but after 6 months, there is no significantly difference between left side and right side. Static light touch and pin pressure nociception are more sensitive method of neurosensory deficit than two point discrimination.

고유광류 분석에 의한 얼굴표정 생성

김경수(Kyeong-Su Kim),최형일(Hyung-I1 Choi) 한국지능시스템학회 1998 한국지능시스템학회 학술발표 논문집 Vol.8 No.1

뇌졸중환자에서 Diaschisis 정도에 따른 운동기능회복과의 관계

전중선,전세일,유우경,이종두,도원수 大韓再活醫學會 1998 Annals of Rehabilitation Medicine Vol.22 No.4

태아의 하악에서 발견된 이상결절 1례의 연구

이치연,이동주,조이수,김승인,이지연,김은철 원광대학교 생체재료·매식연구소 1996 원광생체재료·매식 Vol.5 No.2

Dens evaginatus is a rare developmental anomaly in which an enamel-covered tubercle projects from the occlusal surface of a tooth. usually lower second premolar. When the tubercle fractures, the pulpal extension into the tubercle may be exposed, which results in early pulpal necrosis, periapical infection and even osteomyelitis. We found the dens evaginatus in 16-week-old fetal mandible. Microscopically, we observed the protrusion of dental papilla into the dental organ and hard tissue formation which will be the tubercle by serial section. This anomaly was reported to be very rare in tooth development of fetus, so we reported this finding with brief review of literatures.

초음파 속도를 이용한 니켈기 초내열 합금의 크리프 손상 평가

卞在元,權潚仁,박은수,朴翼根 대한금속재료학회 2001 대한금속·재료학회지 Vol.39 No.12

Microstructural changes in the artificially creep damaged Ni base superalloy, PM1000, were nondestructively evaluated by ultrasonic velocity measurement. The ultrasonic velocity decreased as the volume fraction of cavity in the crept specimen increased, which was caused mainly by the decrease of Young's modulus. The change in theoretical ultrasonic velocity with amount of cavity could be calculated by using the composite material model assuming that cavities were dispersed in the matrix as second phases with zero elastic stiffness. The increase of dislocation density also resulted in the decrease of ultrasonic velocity. The discrepancy between experimental ultrasonic velocity and theoretical one was rationalized in terms of dislocation substructure.