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Two Cases of Lipoatrophy after Local Corticosteroid Injection
김인하,이혜림,이상수,Kim, Inha,Lee, Hye Lim,Lee, Sang-Soo The Korean Society of Clinical Neurophysiology 2015 Annals of Clinical Neurophysiology Vol.17 No.2
The adverse effects of systemic steroid medications are well known, whereas those of local steroid injections are unclear even to clinicians. We report two cases of localized lipoatrophy and depigmentation following local steroid injection. Although the incidence of soft tissue atrophy after local steroid injection is rare, it will increase in proportion to the frequency of the procedure. All clinicians, even those who do not perform steroid injections, should be aware of the occurrence of this cosmetically disturbing adverse effect.
김인하,배영찬 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.2
The generalized Lennard-Jones (GLJ) pair potential function is employed to calculate the osmotic properties of binary globular protein/salt systems with various conditions. In this work, the characteristic parameters for the GLJ potential function are assumed to be dependent on density as well as temperature, which are obtained from the computer simulation data for the compressibility factor. The energy parameters are determined from the experimental cloud-point temperature (CPT) data for protein solutions and directly used to describe osmotic pressures of the corresponding systems with no model parameters. The proposed model agrees fairly well with experimental data.
염화철(III) 개질 활성탄을 이용한 오염된 지하수 중 질산성 질소의 제거 특성
김인하,한인섭 한국도시환경학회 2019 한국도시환경학회지 Vol.19 No.2
In this study, the removal rate of nitrate nitrogen, which is the main contaminant of groundwater, was observed in various parameters using iron chloride(III)- modified activated carbon. The adsorption characteristics were investigated by Langmuir and Freundlich adsorption isotherms. The contamination of nitrate nitrogen in some groundwaters is very serious due to livestock waste and nitrogen-based synthetic fertilizer. When underground water contaminated with nitrate is ingested, it is reduced to nitrite in the body. It lowers the ability of oxygen to transport and produces N-nitroso compounds, which are carcinogenic agents. Therefore, it is strictly regulated to below 10 mg/L in domestic water quality standards. The removal rates of nitrate nitrogen were determined by varying the concentration of iron chloride, the amount of iron chloride - modified activated carbon, and the pH of the initial nitric acid solution, which may affect the adsorption reaction of iron chloride - modified activated carbon and nitrate nitrogen. When nitrate nitrogen was removed using iron chloride-modified activated carbon, equilibrium was reached after about 2 hours. The removal rate of nitrate nitrogen using activated carbon modified with 50 mM iron chloride solution was increased about 2.73 times compared with control activated carbon. In the case of 30 mM iron chloride - modified activated carbon, when the amount of iron chloride - modified activated carbon was 1 g, 2.5 g, 5 g, 10 g, 20 g, the removal rate of nitrate nitrogen was 30.39%, 67.07%, 91.68%, 97.18% and 99.58%. As the pH of the initial nitric acid solution increased, the removal rate of nitrate nitrogen decreased, suggesting that pH adjustment of the sample was necessary. This study is expected to providea basis for the study on the modification of activated carbon to remove contaminants in the future. 본 연구에서는 염화철(III) 개질 활성탄을 사용하여 다양한 변수에서 지하수의 주된 오염물질인 질산성 질소의 제거율 변화를 관찰하고, 그 결과를 Langmuir, Freundlich 흡착등온식에 적용하여 흡착 특성을 검토하고자 하였다. 축산 폐기물, 질소계 합성 비료 등으로 인해 일부 지하수에서 질산성 질소의 오염은 매우 심각한 수준이다. 질산성 질소로 오염된 물을 섭취하면 체내에서 아질산성 질소로 환원되어 산소의 운반능력을 저하시키고, 발암유발물질인 N-nitroso 화합물을 생성하기 때문에국내 수질환경기준 10 mg/L 이하로 엄격히 규제하고 있다. 염화철(III) 개질 활성탄과 질산성 질소의 흡착반응에 영향을 미칠수 있는 염화철 개질 활성탄 제조시 염화철의 농도, 염화철 개질 활성탄의 양, 초기 질산 용액의 pH에 변수를 두어 질산성 질소의 제거율을 비교하였다. 염화철 개질 활성탄을 사용하여 질산성 질소를 제거할 때 약 2시간을 반응시키면 평형상태에 도달하였다. 염화철로 개질하지 않은 활성탄에 비하여 50 mM의 염화철 용액으로 개질한 활성탄의 질산성 질소의 제거율은 약2.73 배 증가하였고, 염화철 개질 활성탄의 양이 1 g, 2.5 g, 5 g, 10 g, 20 g일 때 30 mM 염화철 개질 활성탄의 경우 30.39%, 67.07%, 91.68%, 97.18%, 99.58%의 질산성 질소의 제거율을 보였다. 초기 질산 용액의 pH가 증가할수록 질산성 질소의 제거율은 감소하는 것으로 나타났으므로 시료의 pH 조절이 필요한 것으로 나타났다. 따라서 본 연구는 향후 오염물질을 제거하기 위한 활성탄의 개질에 관한 연구의 기초로 사용될 수 있을 것으로 판단된다.
김인하,곽승조,이광호 국방기술품질원 2023 국방품질연구논집 Vol.5 No.2
The equipment installed on ships must withstand impact loads. Equipment manufacturers produce prototypes for environmental testing and conduct vibration and impact tests to prove the environmental impact of the equipment. In this study, an elastic mount was selected to verify the structural safety of equipment applied to a warship. A vibration analysis was performed according to the vibration test method of MIL-STD-167-1A, and structural safety was confirmed. For the shock analysis, the impulse of a half sine wave with a duration of 20 ms at an input acceleration of 20 g and structural safety were confirmed. Vibration and impact analyses were performed for preliminary verification. Prototypes were manufactured, and environmental tests were conducted. Environmental testing confirmed no physical or functional damage, indicating that the product can be installed in ships.
Surgical Repair of Aortocaval Fistula Presenting with Cardiogenic Shock
김인하,민호기,김지용,김동기,강도균,전희재,황윤호 대한흉부외과학회 2018 Journal of Chest Surgery (J Chest Surg) Vol.51 No.6
Aortocaval fistula (ACF) occurs in <1% of all abdominal aortic aneurysms (AAAs), and in 3% to 7% of all ruptured AAAs. The triad of clinical findings of AAA with ACF are abdominal pain, abdominal machinery bruit, and a pulsating abdominal mass. Other findings include pelvic venous hypertension (hematuria, oliguria, scrotal edema), lower-limb edema with or without arterial insufficiency or venous thrombus, shock, congestive heart failure, and cardiac arrest. Surgery is the main treatment modality. We report successful surgical treatment in a patient with a ruptured AAA with ACF who presented with cardiogenic shock.