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LPCD법에 의한 Tin박막의 전계 에미터 어레이 제작
조경제,이상윤,류정탁,김연보,이진호 大邱大學校 科學技術硏究所 2001 科學技術硏究 Vol.8 No.2
Using low pressure chemical vapor deposition (LPCVD), TiN thin films as field emitter array were fabricated. In this Work, a method was transfered to a substrate and the wet-etching of the silicon substrate instead of fabricated method of mold shape was using in generally but we have fabricated gated field emitter tips as using mold shape of the new method that using a side wall space structure. Following sequences such as LPCVD method of a gate electrod and gate oxide on a silicon substrate and defesited BPSG thin film as a high temperature was flowed by the mold shape of a sharpen, the TiN as a materials of emitter tips was deposited after was bounded by anodic bonding and the wet-etching of the silicon substrate by using KOII solution, the last have fabricated a gated field emitter arrays of a sharpen. These emitters were estmated by scanning electron microscopy and X-ray diffraction.
Ryu, Jung-Hwa,Park, Minhwa,Kim, Bo-Kyung,Kim, Yu-Hee,Woo, So-Youn,Ryu, Kyung-Ha D.A. Spandidos 2016 MOLECULAR MEDICINE REPORTS Vol. No.
<P>Mesenchymal stromal cells (MSCs) have therapeutic potential for repairing tissue damage and are involved in immune regulation. MSCs are predominantly isolated from bone marrow (BM), adipose tissue or placental tissue. Further to these well-known sources, the isolation of MSCs from human tonsils was previously reported. The aim of the present study was to investigate a potential role for tonsil-derived MSCs (T-MSCs) in BM reconstitution and application towards supplementing hematopoiesis in a mouse model of BM transplantation (BMT). Eight-week-old BALB/c female mice received 80 mg/kg busulfan (Bu)/200 mg/kg cyclophosphamide (Cy) conditioning chemotherapy for BM ablation. Subsequently, human T-MSCs were injected into the Bu/Cy-treated mice with or without BM cells (BMCs) obtained from allogeneic C57BL/6 male mice. After 3 weeks, peripheral blood and BM was collected for analysis. The red blood cell count in the group that received BMCs had almost returned to normal, whereas mononuclear cell counts and BM cellularity were most improved in the T-MSCs + BMCs group. These results indicate that the T-MSCs enhanced myelopoiesis in the allogeneic BMT mouse model, as evidenced by the restoration of BM with hematopoietic cells, as well as increased myeloid colony formation <I>in vitro</I>. Therefore, T-MSCs may provide a source of MSCs to facilitate myelopoiesis and megakaryocytosis following BMT.</P>
류경수(Kyung-Soo Ryu),박경환(Kyung-whan Park),송보원(Bo-wan Song) 한국생약학회 1981 생약학회지 Vol.12 No.1
The root-bark of the mulberry tree has been used as a medicine with antitussive, antiphlogistic, diuretic etc. in Korea. Among many kinds of mulberry trees, Morus Lhou has been widlly cultivated in our country. In this experiment, thee substances were obtained from the root-bark of Morus Lhou removed its cork layer by column chromatography of methanol extract. One of the substances was supposed as α-amyrin acetate, another was alyceride, the other was confirmed as β-sistosterol by chemical and physical methods.
Bo Kyung Kim,Jung Won Chun,Sang Hyub Lee,Ji Kon Ryu,Yong-Tae Kim,Woo Hyun Paik 대한소화기내시경학회 2022 Clinical Endoscopy Vol.55 No.4
A lumen-apposing metal stent (LAMS) is a saddle-shaped stent with large flanges at both ends, thereby preventing stent migration andhelping with approximation of the adjacent structures. We report the case of a 25-year-old female with remnant choledochal cyst whichwas successfully treated with LAMS after initial treatment failure with a plastic stent. Although complete excision of the cyst is the definitetreatment of choledochal cysts, endoscopic ultrasonography-guided cystoduodenostomy can be considered in cases wherein surgeryis not feasible and dysplasia is not present. LAMS may be preferred to plastic stents for effective resolution of remnant choledochalcyst and prevention of ascending infection.
Minimal Pleural Effusion in Small Cell Lung Cancer: Proportion, Mechanisms, and Prognostic Effect.
Ryu, Jeong-Seon,Lim, Jun Hyeok,Lee, Jeong Min,Kim, Woo Chul,Lee, Kyung-Hee,Memon, Azra,Lee, Seul-Ki,Yi, Bo-Rim,Kim, Hyun-Jung,Hwang, Seung-Sik Radiological Society of North America 2015 Radiology Vol. No.
<P>Purpose: To determine the frequency and investigate possible mechanisms and prognostic relevance of minimal (<10 mm thickness) pleural effusion in patients with small cell lung cancer (SCLC). Materials and Methods: The single-center retrospective study was approved by the institutional review board of the hospital, and informed consent was waived by the patients. A cohort of 360 consecutive patients diagnosed with SCLC by using histologic analysis was enrolled in this study. Based on the status of pleural effusion on chest computed tomographic (CT) scans at diagnosis, patients were classified into three groups: no pleural effusion, minimal pleural effusion, and malignant pleural effusion. Eighteen variables related to patient, environment, stage, and treatment were included in the final model as potential confounders. Results: Minimal pleural effusion was present in 74 patients (20.6%) and malignant pleural effusion in 83 patients (23.0%). Median survival was significantly different in patients with no, minimal, or malignant pleural effusion (median survival, 11.2, 5.93, and 4.83 months, respectively; P < .001, log-rank test). In the fully adjusted final model, patients with minimal pleural effusion had a significantly increased risk of death compared with those with no pleural effusion (adjusted hazard ratio, 1.454 [95% confidence interval: 1.012, 2.090]; P = .001). The prognostic effect was significant in patients with stage I-III disease (adjusted hazard ratio, 2.751 [95% confidence interval: 1.586, 4.773]; P < .001), but it disappeared in stage IV disease. An indirect mechanism representing mediastinal lymphadenopathy was responsible for the accumulation in all but one patient with minimal pleural effusion. Conclusions: Minimal pleural effusion is a common clinical finding in staging SCLC. Its presence is associated with worse survival in patients and should be considered when CT scans are interpreted. (C) RSNA, 2015</P>
Gas分析에 依한 變壓器 內部異常 草期發見에 關한 硏究
柳京燮,蔡萬秉,宋瑋憲,張香東,洪壯厚,沈鶴輔,柳喆模 서울産業大學校 1976 논문집 Vol.9 No.1
For the development of reliability of electric Power supply. It is very important to Predict the internal troubles of the transformer on load as We prevent the accident previously to try the trouble shooting. We have the testing results by gas chromato graph as following Occasion; a) We can predict that H₂CH₄ generated from insulating oil is the symptom of over heated coil produced. b) We can predict that a lot of C₂H₂ and H₂ generated from insulating oil is the symptom of the insulation trouble and pyrolysis of insulating oil by are occured. c) In the case of CO₂ and CO is generated from transformer's insulation oil is the sign of insulation material for example press board and phenol resin over heated.
( Bo-min Ki ),( Yu Mi Kim ),( Jun Min Jeon ),( Hee Wook Ryu ),( Kyung-suk Cho ) 한국미생물생명공학회(구 한국산업미생물학회) 2017 Journal of microbiology and biotechnology Vol.27 No.12
Soil burial is the most widely used disposal method for infected pig carcasses, but composting has gained attention as an alternative disposal method because pig carcasses can be decomposed rapidly and safely by composting. To understand the pig carcass decomposition process in soil burial and by composting, pilot-scale test systems that simulated soil burial and composting were designed and constructed in the field. The envelope material samples were collected using special sampling devices without disturbance, and bacterial community dynamics were analyzed by high-throughput pyrosequencing for 340 days. Based on the odor gas intensity profiles, it was estimated that the active and advanced decay stages were reached earlier by composting than by soil burial. The dominant bacterial communities in the soil were aerobic and/or facultatively anaerobic gram-negative bacteria such as Pseudomonas, Gelidibacter, Mucilaginibacter, and Brevundimonas. However, the dominant bacteria in the composting system were anaerobic, thermophilic, endospore-forming, and/or halophilic gram-positive bacteria such as Pelotomaculum, Lentibacillus, Clostridium, and Caldicoprobacter. Different dominant bacteria played important roles in the decomposition of pig carcasses in the soil and compost. This study provides useful comparative date for the degradation of pig carcasses in the soil burial and composting systems.
Ryu, Ah-Jin,Lee, Kyung Eun,Kwon, Soon-Sung,Shin, Eun-Seok,Shim, Eun Bo The Korean Society of Pharmacology 2019 The Korean Journal of Physiology & Pharmacology Vol.23 No.1
Body surface potential map, an electric potential distribution on the body torso surface, enables us to infer the electrical activities of the heart. Therefore, observing electric potential projected to the torso surface can be highly useful for diagnosing heart diseases such as coronary occlusion. The BSPM for the heart of a patient show a higher level of sensitivity than 12-lead ECG. Relevant research has been mostly based on clinical statistics obtained from patients, and, therefore, a simulation for a variety of pathological phenomena of the heart is required. In this study, by using computer simulation, a body surface potential map was implemented according to various occlusion locations (distal, mid, proximal occlusion) in the left anterior descending coronary artery. Electrophysiological characteristics of the body surface during the ST segment period were observed and analyzed based on an ST isointegral map. We developed an integrated system that takes into account the cellular to organ levels, and performed simulation regarding the electrophysiological phenomena of the heart that occur during the first 5 minutes (stage 1) and 10 minutes (stage 2) after commencement of coronary occlusion. Subsequently, we calculated the bipolar angle and amplitude of the ST isointegral map, and observed the correlation between the relevant characteristics and the location of coronary occlusion. In the result, in the ventricle model during the stage 1, a wider area of ischemia led to counterclockwise rotation of the bipolar angle; and, during the stage 2, the amplitude increased when the ischemia area exceeded a certain size.