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Borami Lim,Min-Jung Kim,좌용호,양재교,서정혜,이연승,이동석,노태형 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.4
Many of the solid-state reaction or chemistry-based processing routes for functional ceramics inevitably involve a calcination process of the chemically-derived precursors at an intermediate/high temperature in order to form the designed ceramic phase. The purpose of this study is to directly synthesize a nano-sized lanthanum-modified lead-titanate (PLT) powder with a perovskite structure by using a high-energy mechano-chemical technique at room temperature. The nanocrystalline PLT was synthesized without any thermal treatment from an oxide powder or salts then, we investigated the chemical reaction, the phase transformation, and the crystalline structure for the mechanochemical procedures. Many of the solid-state reaction or chemistry-based processing routes for functional ceramics inevitably involve a calcination process of the chemically-derived precursors at an intermediate/high temperature in order to form the designed ceramic phase. The purpose of this study is to directly synthesize a nano-sized lanthanum-modified lead-titanate (PLT) powder with a perovskite structure by using a high-energy mechano-chemical technique at room temperature. The nanocrystalline PLT was synthesized without any thermal treatment from an oxide powder or salts then, we investigated the chemical reaction, the phase transformation, and the crystalline structure for the mechanochemical procedures.
Fabrication and Characterization of High-activity Pt/C Electrocatalysts for Oxygen Reduction
Borami Lim,Joung Woon Kim,Seung Jun Hwang,유성종,조은애,임태훈,Soo-Kil Kim 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.6
A 20 wt % Pt/C is fabricated and characterized for use as the cathode catalyst in a polymer electrolyte membrane fuel cell (PEMFC). By using the polyol method, the fabrication process is optimized by modifying the carbon addition sequence and precursor mixing conditions. The crystallographic structure, particle size, dispersion, and activity toward oxygen reduction of the as-prepared catalysts are compared with those of commercial Pt/C catalysts. The most effective catalyst is obtained by ultrasonic treatment of ethylene glycol-carbon mixture and immediate mixing of this mixture with a Pt precursor at the beginning of the synthesis. The catalyst exhibits very uniform particle size distribution without agglomeration. The mass activities of the as-prepared catalyst are 13.4 mA/mgPt and 51.0 mA/mgPt at 0.9 V and 0.85 V,respectively, which are about 1.7 times higher than those of commercial catalysts.
( Woo Hyeon Kim ),( Borami Kang ),( Byung Wook Kim ),( Joon Sung Kim ),( Hae Mi Lee ),( Eun Joo Lim ),( Jong In Kim ),( Bong Koo Kang ),( Jeong Seon Ji ),( Bo In Lee ),( Hwang Choi ) 대한간학회 2013 Gut and Liver Vol.7 No.2
Extraintestinal manifestations are not uncommon in Crohn`s disease, and a thromboembolic event is a disastrous potential complication. Deep vein thrombosis is the most common manifestation of a thromboembolic event and typically occurs in association with active inflammatory disease. Peripheral neuropathy in Crohn`s disease has rarely been reported and is considered an adverse effect of metronidazole therapy. Here, we describe a patient who was initially diagnosed with Crohn`s disease complicated with deep vein thrombosis and ulnar neuropathy without metronidazole exposure. The simultaneous occurrence of these complications in the early stage of Crohn`s disease has never been reported in the English literature. (Gut Liver 2013;7:252-254)
생체분자 분리를 위한 Fe<sub>3</sub>O<sub>4</sub> 나노입자의 표면수식과 분산 안정성 향상
김민정,안국환,임보라미,김희택,좌용호,Kim, Min-Jung,An, Guk-Hwan,Lim, Borami,Kim, Hee-Taik,Choa, Yong-Ho 한국분말야금학회 2007 한국분말재료학회지 (KPMI) Vol.14 No.4
The surface of magnetite ($Fe_{3}O_{4}$) nanoparticles prepared by coprecipitation method was modified by carboxylic acid group of poly(3-thiophenacetic acid (3TA)) and meso-2,3-dimercaptosuccinic acid (DMSA). Then the lysozyme protein was immobilized on the carboxylic acid group of the modification of the magnetite nanoparticles. The magnetite nanoparticles are spherical and the particle size is approximately 10 nm. We measured quantitative dispersion state by dispersion stability analyzer for each $Fe_{3}O_{4}$ nanoparticles with and without surface modification. The concentration of lysozyme on the modified magnetite nanoparticles was also investigated by a UV-Vis spectrometer and compared to that of magnetite nanoparticles without surface modification. The functionalized magnetite particles had higher enzymatic capacity and dispersion stability than non-functionalized magnetite nanoparticles.
Analysis of Neck Trauma Patients Using the Korean National Emergency Department Information System
Jung Hun Kim,Sung Won Jung,Jin Suk Lee,Jong-Min Park,Han Deok Yoon,Jung Tak Rhee,김선월,Borami Lim,So Ra Kim,Il-Young Jung 대한외상중환자외과학회 2018 Journal of Acute Care Surgery Vol.8 No.1
Purpose: Trauma is a leading cause of death, even in previously healthy and disease-free individuals, and the mortality rate is very high in neck trauma patients. On the other hand, there have been few studies related to neck injuries. This study examined the characteristics and treatment results of trauma-related neck injuries using the data from Korean National Emergency Department Information System. Methods: Neck trauma patients were classified using the 6th Korean Standard Disease Classification system. The patients’ demographic factors, number of surgeries, and clinical results were investigated. Statistical analysis was conducted using SPSS to evaluate the annual differences in the demographic factors; mortality according to the site of injury and type of surgery; and mechanisms of injury. Results: From 2011 to 2014, 2,458 neck trauma patients were treated in hospitals in South Korea. The number of patients admitted to regional and local emergency medical centers was 883 (35.9%) and 1,502 (61.1%), respectively. No significant annual differences were observed in age, sex ratio, location of treatment center, mortality, and injury site (vascular, tracheal, or esophageal). In addition, no significant differences in the cause of injury, performed surgery (%), and mortality according to the injured organ were observed. Conclusion: This study revealed no annual changes in neck injury patients or differences in mortality according to injured organs. This study can be used as a basis for national research on organ-specific injuries, and may help predict the demand for future support projects for the establishment of regional trauma centers. (J Acute Care Surg 2018;8:7-12)
National Follow-up Survey of Preventable Trauma Death Rate in Korea
Kwon Junsik,Lee Myeonggyun,Moon Jonghwan,Huh Yo,Song Seoyoung,Kim Sora,Lee Seung Joon,Lim Borami,Kim Hyo Jin,Kim Yoon,il Kim Hyung,Yun Jung-Ho,Yu Byungchul,Lee Gil Jae,Kim Jae Hun,Kim Oh Hyun,Choi Woo 대한의학회 2022 Journal of Korean medical science Vol.37 No.50
Background: The preventable trauma death rate survey is a basic tool for the quality management of trauma treatment because it is a method that can intuitively evaluate the level of national trauma treatment. We conducted this study as a national biennial follow-up survey project and report the results of the review of the 2019 trauma death data in Korea. Methods: From January 1, 2019 to December 31, 2019, of a total of 8,482 trauma deaths throughout the country, 1,692 were sampled from 279 emergency medical institutions in Korea. All cases were evaluated for preventability of death and opportunities for improvement using a multidisciplinary panel review approach. Results: The preventable trauma death rate was estimated to be 15.7%. Of these, 3.1% were judged definitive preventable deaths, and 12.7% were potentially preventable deaths. The odds ratio for preventable traumatic death was 2.56 times higher in transferred patients compared to that of patients who visited the final hospital directly. The group that died 1 hour after the accident had a statistically significantly higher probability of preventable death than that of the group that died within 1 hour after the accident. Conclusion: The preventable trauma death rate for trauma deaths in 2019 was 15.7%, which was 4.2%p lower than that in 2017. To improve the quality of trauma treatment, the transfer of severe trauma patients to trauma centers should be more focused.
Analysis of Abdominal Trauma Patients Using National Emergency Department Information System
( In-gyu Song ),( Jin Suk Lee ),( Sung Won Jung ),( Jong-min Park ),( Han Deok Yoon ),( Jung Tak Rhee ),( Sun Worl Kim ),( Borami Lim ),( So Ra Kim ),( Il-young Jung ) 대한외상학회 2016 大韓外傷學會誌 Vol.29 No.4
Purpose: To develop an inclusive and sustainable trauma system as the assessment of burden of injuries is very much important. The purpose of this study was to evaluate the estimates and characteristics of abdominal traumatic injuries. Methods: The data were extracted from the National Emergency Department Information System. Based on Korean Standard Classification for Disease 6th version, which is the Korean version of International Classification of Disease 10th revision, abdominal injuries were identified and abdominal surgeries were evaluated with electronic data interchange codes. Demographic factors, numbers of surgeries and clinical outcomes were also investigated. Results: From 2011 to 2014, about 24,696 patients with abdominal trauma were admitted to the hospitals annually in South Korea. The number of patients who were admitted to regional and local emergency medical centers was 8,622 (34.91%) and 15,564(63.02%), respectively. Based on National Emergency Department Information System, liver was identified as the most commonly injured abdominal solid organ (39.50%, 9,754/24,696, followed by spleen (17.57%, 4,338/24,696) and kidney (12.94%, 3,195/24,696). Conclusion: This study shows that the demand for abdominal trauma care is considerable in South Korea and most of the patients with abdominal trauma were admitted to regional or local emergency centers. The results of this study can be used as good source of information for staffs to ensure proper delivery of abdominal trauma care in trauma centers nationally. [ J Trauma Inj 2016; 29: 116-123 ]