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효과적인 뇌졸중 실험동물 모델 확립을 위한 시간에 따른 중대뇌동맥 폐색법
박지애 외 중앙대학교 의과대학 의과학연구소 2009 中央醫大誌 Vol.34 No.3/4
In this study, to establish effective model of middle cerebral artery occlusion (MCAO), we investigated the infarct size according to the occlusive duration. Middle cerebral artery of rats was temporarily ligated each for 0 min, 30 min, 60 min and 120 min. After each time for occlusion, rats were reperfused. As a result, rats in 60 min group and 120 min group showed the biggest infarct size than rats in any other group, where as rats in 30min group had the smallest infarct size. Unfortunately, lethality of rats in 120 min is almost 80%. However, lethality of rats in 60 min group was similar with rats in 30 min group. Therefore, occlusion of middle cerebral artery for 60 min is appropriate for establishment of effective stroke model.
A New Conceptual Framework for Designing Cloud Computing Business Model
Jiae Park(박지애),Youngho Lee(이영호),Gigyoung Park(박기경) 한국경영과학회 2009 한국경영과학회 학술대회논문집 Vol.2009 No.10
In this paper, we explore the cloud computing system that provides new business opportunities in IT industry. We clarify cloud computing environment and analyze key drivers of cloud service market. Motivated by the distribution process of cloud services, we design a set of cloud service models that pave the way for firm to identify profitable business cases. In addition, we propose revenue model for cloud service models according to services transaction system. Furthermore, we develop a modeling framework for selecting a suitable business model.
Park, Hyeong Bin,Lee, Byoung-Doo,Lee, Chang Woo,Hwang, Jung Eun,Park, Hwan Joon,Kim, Seongjun,An, Jiae,Kim, Pyoung Beom,Kim, Nam Young National Institute of Ecology 2021 국립생태원회보(PNIE) Vol.2 No.4
Iris dichotoma Pall. found on Daechung Island in Korea has been designated as an endangered species. To aid in conservation efforts of this species, this study investigated its germination characteristics and seed dormancy type. Four sets of seeds were incubated at different temperatures (4/1℃, 15/6℃, 20/10℃, and 25/15℃). One set of seeds was cold stratified (4 weeks at 4/1℃). The final germination rate and mean germination time showed that the optimal germination temperature was 25/15℃. Final germination rates were ~70%, showing no significant difference among temperature treatments. However, mean germination time were significantly different among all temperature treatments except for 4/1℃. Mean germination time for seeds with temperature treatments of 15/6℃, 20/10℃, and 25/15℃ were 3.2, 2.1, and 1.5 weeks, respectively. At 25/15℃, the mean germination time was half of that at 15/6℃. Seeds of I. dichotoma had fully developed embryos at the time of dispersal. No additional growth of the embryo was observed. Cold stratification did not affect the final germination rate or the mean germination time. This study shows that seeds of I. dichotoma have no physiological or morphological dormancy, unlike other members of the Iris genus known to have seed dormancy that needs a relatively high incubation temperature (≥25/15℃) for mass propagation to occur. These results will be useful for understanding ecophysiological mechanisms related to the species' habitat. They are also useful for mass propagation of I. dichotoma for the purpose of conserving this endangered species.
( Jiae Park ),( Jong Hun Kim ),( Young Kyung Yoon ),( Jang Wook Sohn ),( Min Ja Kim ) 대한내과학회 2016 대한내과학회 추계학술발표논문집 Vol.2016 No.1
Background: Cytomegalovirus (CMV) and Clostridium difficile (CDIFF) co-infection in enterocolitis is uncommon. We present a pooled analysis of the reported cases to evaluate the epidemiology and outcome of concomitant CMV and CDIFF enterocolitis.?Methods: Pubmed was searched for English-written articles published up to May 2016. Articles that reported cases of concomitant CMV and CDIFF enterocolitis were reviewed.?Results: A total of 20 cases were identified. Median age was 57 years and there were 11 males. Significant underlying immunosuppressed conditions were noted in 8 patients (8/20, 40%; receipt of solid organ transplantation (SOT) in 5 patients, hematologic malignancy in 2 patients, advanced AIDS in 1 patient). No significant underlying medical condition was noted in 5 patients. There were 3 patients who had prior history of CDIFF infection (3/20, 15%). The majority of patients had recent use of antibiotics (15/20, 75%). Of note, median age for 5 patients who had no significant underlying medical conditions was 78 years. All patients had diarrhea with manifestation of bloody diarrhea in 11 patients (11/20, 55%). Diagnosis of CMV enterocolitis was made on the basis of positive biopsy result (20/20, 100%). CDIFF infection was diagnosed on positive toxin (16 patients), positive culture (3 patients), and morphology of pseudomembranous colitis (1 patient). Most of the patients (18/20, 90%) were treated for both CMV and CDIFF infection, except for 2 patients (one patient who was treated only for CDIFF infection and the other patient without available CDIFF treatment data). Anti-CMV therapy included ganciclovir, valganciclovir, and foscarnet. CDIFF treatment included metronidazole, vancomycin, and 1 case of fecal transplantation. Relapse of CDIFF infection was noted in 1 patient. There were 4 patients who underwent bowel resection surgery for treatment. Death (3/20, 15%) was noted in 2 SOT recipients and 1 elderly patient (83 years) without underlying medical condition.?Conclusions: CMV and CDIFF co-infection in enterocolitis is rare but has been increasingly noted for significant risks of morbidity and mortality, particularly for immunosuppressed patients and elderly patients.
PE-160: Robotic ALPPS in a Patient with Cecal Cancer and Multiple Liver Metastasis (with Video)
( Jiae Park ),( Gi Hong Choi ),( Jin Sub Choi ) 대한간학회 2016 춘·추계 학술대회 (KASL) Vol.2016 No.1
Purpose: The Associating Liver Partition and Portal Vein Ligation Staged Hepatectomy (ALPPS) procedure is a new innovative surgical strategy aiming to potentially overcome the liver failure, thus permitting extended hepatectomy. Methods: A 41 year old female with cecal adenocarcinoma with synchronous numerous liver metastases in near all segments (S1, S4, S5, S6, S7 and S8) underwent Avastin and FOLFOX neoadjuvant therapy. S2 was free from metastasis. One small metastastic lesion was detected in S3 and S1, respectively. To increase a resectability in this patient, we performed ALPPS using daVinci Surgical System. Results: In the first operation, robotic right hemicolectomy was first performed. After that, wedge resection of small metastatic lesions in S3 and S1 was done. The parechymal was transected along the right side of the umbilical ligament. The middle hepatic vein was completely isolated and encircled with a vessel loop. After the parenchymal transection was completed, the hilum started to be dissected. The right hepatic artery was isolated and encircled with a vessel loop. The right portal vein was dissected and sectioned with hem-o-lock clips. To prevent adhesion, anti-adhesive solution was irrigated within the surgical field. The second stage was performed totally robotic on 11th postoperative days. Postoperative adhesion was dissected. After the right liver was mobilized, the right hepatic artery was sectioned. The remaining liver parenchyma was completed transected. Middle hepatic vein and right hepatic vein were ligated with Endo-GIA. Total operation time was 332 minutes and estimated blood loss was 70ml. The patient recovered well and was discharged 20 days after the second stage. Conclusion: Robotic ALPPS procedure can be a safe and feasible technique in experienced centers with advanced robotic skills.