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Yoon Sun Geon,Sim Hong Bo,Lyo In Uk,Kwon Soon Chan,Kim Min Soo 대한말초신경학회 2023 The Nerve Vol.9 No.1
Objective: This study examined the characteristics of patients with cervical spine injuries caused by industrial accidents and analyzed the factors related to mortality.Methods: In total, 424 patients with cervical spine injuries who visited our hospital from 2016 to 2020 were divided into an industrial accident and non-industrial accident groups. Age, sex, fracture severity, facet injury, high cervical injury, spinal epidural hematoma, spinal cord injury, shock, arrival route, Injury Severity Score (ISS), Glasgow Coma Scale (GCS), mortality, and trauma mechanism were compared between the two groups. Regression analysis was performed to determine the factors affecting mortality.Results: Industrial accident patients significantly differed from the rest of the study population in terms of the sex ratio (male ratio, 95.1% vs. 77.8%; p<0.001), arrival route (direct transport, 61.2% vs. 50.9%; p=0.017), and trauma mechanism (p<0.001). Among the trauma mechanisms, falls had the largest difference between industrial accident patients and all patients (55.3% and 28.1%, respectively). Significant associations with mortality were found for falls (odds ratio [OR], 22.330; p=0.015), ISS (OR, 1.056; p=0.008), GCS <9 (OR, 0.014; p<0.001), and shock (OR, 7.290; p<0.001).Conclusion: Falls were the most frequent trauma mechanism of cervical spine injuries in patients who experienced industrial accidents. The factors significantly correlated with mortality were falls, ISS, GCS <9, and shock.
내시경적 검사 및 상부 위장관 조영술상 특징적인 소견을 보인 소아 전정부 격막 1예
윤혜선,심재건 대한소화기내시경학회 1994 Clinical Endoscopy Vol.14 No.3
Antral web (prepyloric mucosal diaphragm) is a rare gastric anomaly that disturbs the gastric outlet and has sometimes been a diagnostic problem to the radiologist and the endoscopist. It is composed of mucosa that enclose a membrane of submucosa and located at the antrum on variable distances from the pylorus. Web is congenital in origin but may be secondary to chronic peptic ulcer disease. Obstructive symptoms may not occur when diaphragmatic aperture is larger than 1 centimeter in diameter. The diagnosis of web relies on the history, barium study and gastroscopic findings but it may be noticed after laparotomy. We experienced an antral web which demonstrated characteristic endoscopic and radiologic findings in an eight-year-old girl. These typical distinguishable findings in endoscopic and barium study in this case can remind of the antral web in patients with gastric outlet obstruction symptoms. Antral web or pyloric web, although rare, should be considered in the differential diagnosis of upper gastrointestinal obstructive symptoms in patients of any age.
Yoon-Sun Huh(허윤선),Eun-Jeong Kim(김은정),Sol-Ji Noh(노솔지),Yu-Min Jeon(전유민),Sung-Won Park (박성원),Geon-Sig Yun(윤건식),Tae-Il Kim(김태일),Young-Ho Kim(김영호) (사)한국생물환경조절학회 2020 생물환경조절학회지 Vol.29 No.4
본 연구는 시설 내 소형 수박 재배 시 관수개시점에 따른 토양수분 함량별 생육, 수량 및 생리적 반응 특성의 차이를 구명하고 소형 수박 생산에 유리한 관수조건을 구명하고자 수행하였다. 토양수분 센서를 이용하여 정식 후 14일부터 수확 7 ~ 10일 전까지 관수개시점별 5처리(-10, -20, -30, -40, 50 kPa)를 두어 관수하였다. 토양수분 함량이 가장 낮은 개시점-50 kPa 처리에서 전반적인 지상부 생육특성은 저조하였으나, 근장 및 뿌리 건물율은 증가하였다. 광합성률, 기공전도도 및 증산율 비교 시, 관수개시점-50 kPa 처리에서 가장 낮았고, -20 kPa ~ -40 kPa 처리 시 광합성률은 높게 조사되었다. 착과율 및 총 상품수량은 -30 kPa 및 -40 kPa 처리에서 각각 84.7 ~ 85.5%, 5,144 ~ 5,305 kg/10a으로 유의하게 증가하였다. 식물체의 외부환경 관련 스트레스 지표 물질로 알려진 프롤린, ABA, 총 페놀 및 시트룰린의 함량은 토양수분 함량이 낮아질수록 증가하였으며, 특히 관수개시점-50 kPa 처리에서 가장 높게 조사되었다. 따라서 이와 같은 결과를 종합해 볼 때, 시설 내 안정적인 소형 수박 생산을 위하여 관수개시점을 -30 kPa ~ -40 kPa 수준으로 조정하여 토양수분 함량을 조절하는 것이 수박 생육 향상 및 상품수량 증대에 가장 유리한 것으로 판단되었다. Watermelon yield mainly depends on soil water content controlled by irrigation in a plastic greenhouse. In this study, we investigated the effect of different soil moisture contents affected by irrigation starting point on growth, yield, and physiological responses of small-sized watermelons. Irrigation was initiated at 5 different levels of soil water content as a starting point with soil moisture detecting sensor after 14 days of transplanting, and stopped at 7 ~ 10 days before harvest. These treatments were compared with the conventional periodic irrigation as control. When soil had the lowest moisture content (-50 kPa), the overall shoot growth was retarded, but the root length and root dry weight increased. The photosynthetic parameters (photosynthetic rate, stomatal conductance, and transpiration rate) of watermelon leaves decreased significantly in the lowest soil moisture content (-50 kPa). On the other hand, the photosynthetic rates of watermelon leaves grown with irrigation starting point between -20 and -40 kPa were observed to be higher than those of other treatments. Fruit set rate and marketable fruit yield increased significantly at –30 kPa and –40 kPa. Proline, abscisic acid (ABA), total phenol and citrulline, which are known to contribute to stress tolerance under drought condition, increased as soil water content decreased, particularly, the largest increases were recorded at –50 kPa. From these results, it was found that an appropriate water supply adjusted with an irrigation starting point between -30 and -40 kPa could help to keep favorable soil water content during the cultivation of small-sized watermelons, promoting the marketable fruit production as well as inducing the vigorous plant growth and reproductive development.
Yoon, Chong S.,Ryu, Hoon-Hee,Park, Geon-Tae,Kim, Jae-Hyung,Kim, Kwang-Ho,Sun, Yang-Kook The Royal Society of Chemistry 2018 Journal of Materials Chemistry A Vol.6 No.9
<P>The electrochemical properties of Li[Ni0.95Co0.025Mn0.025]O2, the composition of which is similar to that of LiNiO2, were evaluated to test whether the beneficial effect of Co and Mn addition persists at this extremely Ni-rich layered Li[NixCoyMn1−x−y]O2(NCM) cathode. Despite their low concentrations, the presence of Co and Mn ions notably improved the cycling and thermal stability of Li[Ni0.95Co0.025Mn0.025]O2over that of LiNiO2(initial discharge capacity of 238 mA h g<SUP>−1</SUP>with 85% retention after 100 cycles when cycled at 4.3 V for Li[Ni0.95Co0.025Mn0.025]O2<I>vs.</I>248 mA h g<SUP>−1</SUP>but with 74% retention for LiNiO2). It was also shown that the capacity degradation of highly Ni-enriched NCM cathodes appears to arise from the anisotropic volume change during Li removal/insertion, which was aggravated by the formation of the H3 phase in the delithiated state. The particle core was especially susceptible to structural damage from the accumulation of the intrinsic internal strain, which led to the initiation and propagation of microcracks from the particle core. The microcracks subsequently exposed the particle core to electrolyte damage for a prolonged period in the delithiated state, leading to eventual disintegration of the secondary particles. It appears that protecting the particle core (or interparticle boundaries) may help in extending the cycling stability of Ni-rich NCM cathodes, especially for those with very high Ni compositions.</P>
Growth of ZnO-Nanorod Grating on the Seed Grating Produced by Femtosecond Laser Pulses
Lee, Geon Joon,Nam, Hyun Jung,Hwangbo, Chang Kwon,Lim, Hyunjin,Cheong, Hyeonsik,Kim, Hee Soo,Yoon, Chong Seung,Min, Sun-Ki,Han, Sung-Hwan,Lee, YoungPak IOP Publishing 2010 Japanese journal of applied physics Vol.49 No.r10
Gyeong Geon Lee,Joon Seong Park,Hyung Sun Kim,Dong Sup Yoon,Jin Hong Lim Korean Association of Hepato-Biliary-Pancreatic Su 2022 Annals of hepato-biliary-pancreatic surgery Vol.26 No.3
Backgrounds/Aims: Postoperative pain management is a key to enhanced recovery after surgery. The aim of this study was to evaluate clinical effect of preoperative intravenous (IV) non-steroidal anti-inflammatory drugs (NSAIDs) on relief of postoperative pain in patients after laparoscopic cholecystectomy. Methods: This single center, retrospective study was conducted between September 2019 and May 2020. A total of 163 patients were divided into two groups: Ibuprofen group (preoperative IV ibuprofen, n = 77) and Ketorolac group (preoperative IV ketorolac, n = 86). The primary outcome was postoperative pain score measured immediately in the recovery room. Results: There was no difference in demographic characteristics between the two groups of patients. Postoperative pain score measured immediately in the recovery room was significantly higher in the Ibuprofen group than in the Ketorolac group (mean value: 5.09 vs. 4.61; p = 0.027). The number of patients who needed analgesics immediately in the recovery room was also higher in the Ibuprofen group than in the Ketorolac group (28 [36.4%] vs. 18 [20.9%]; p = 0.036). Conclusions: In this study, preoperative IV injection with ketorolac reduced postoperative pain and analgesic requirement in the recovery room more effectively than that with ibuprofen. However, both showed similar effects on peak pain and pain at discharge. Numbers of patients requiring additional analgesics were also similar between the two groups.
SURFACE CLEANING BY ICE-PARTICLE JET(2) : PREPARATION OF CONTAMINATED SURFACE AND ITS CLEANING
Kim, Sun Geon,Yoon, Cheol Nam,Sung, Un Cheol 한국화학공학회 1997 Korean Journal of Chemical Engineering Vol.14 No.1
A physical method of surface cleaning has been developed using the jet of micron-sized ice particles in a low pressure impactor. The substrate to be cleaned was prepared by both applying organic films and depositing polystyrene (PS) particles on substrates. The PS particles, as a source of contamination, were produced with the average sizes ranging from 0.5 to 3 micrometers and narrow size distribution under well-controlled conditions. The particles were deposited uniformly and controllably by changing the deposition time, carrier gas flow rate, and substrate temperature. Major variables for removing both the films and contaminating particles were the removal time, chamber pressure, carrier gas flow rate, nozzle-to-substrate distance and number concentration of ice particles. We proposed two models on film-removal mechanism, which could be applied, depending on the kinetic energy of the ice particles and the hardness of the film. The ice-particle jet system, as a method of cleaning, was found so effective to remove physically both films and particles adhered to a wafer.
Do, Geon-Yeop,Kim, Jin-Woo,Park, Hyo-Jin,Yoon, Seung-Bin,Park, Jae-Young,Yang, Seul-Gi,Jung, Bae Dong,Kwon, Yong-Soo,Kang, Man-Jong,Song, Bong-Seok,Kim, Sun-Uk,Chang, Kyu-Tae,Koo, Deog-Bon Asian Australasian Association of Animal Productio 2017 Animal Bioscience Vol.30 No.9
Objective: Phellodendron amurense (P. amurense) and Humulus japonicus (H. japonicus) are closely involved in anti-oxidative response and increasing antioxidant enzymes activities. However, the effects of their extracts on development of preimplantation bovine embryos have not been investigated. Therefore, we investigated the effects of P. amurense and H. japonicus extracts on developmental competence and quality of preimplantation bovine embryos. Methods: After in vitro fertilization, bovine embryos were cultured for 7 days in Charles Rosenkrans amino acid medium supplemented with P. amurense ($0.01{\mu}g/mL$) and H. japonicus ($0.01{\mu}g/mL$). The effect of this supplementation during in vitro culture on development competence and antioxidant was investigated. Results: We observed that the blastocysts rate was significantly increased (p<0.05) in P. amurense ($28.9%{\pm}2.9%$), H. japonicus ($30.9%{\pm}1.5%$), and a mixture of P. amurense and H. japonicus ($34.8%{\pm}2.1%$) treated groups compared with the control group ($25.4%{\pm}1.6%$). We next confirmed that the intracellular levels of reactive oxygen species (ROS) were significantly decreased (p<0.01) in P. amurense and/or H. japonicus extract treated groups when compared with the control group. Our results also showed that expression of cleaved caspase-3 and apoptotic cells of blastocysts were significantly decreased (p<0.05) in bovine blastocysts derived from both P. amurense and H. japonicus extract treated embryos. Conclusion: These results suggest that proper treatment with P. amurense and H. japonicus extracts in the development of preimplantation bovine embryos improves the quality of blastocysts, which may be related to the reduction of ROS level and apoptosis.