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티탄산 리튬-탄소 복합섬유의 리튬 이차전지 음극소재 적용
오장혁 ( Jang Hyeok Oh ),김성수 ( Seong Su Kim ),최윤희 ( Yun Hee Choi ),조중상 ( Jung Sang Cho ) 충북대학교 산업과학기술연구소 2020 산업과학기술연구 논문집 Vol.34 No.1
Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> (LTO)-carbon composite fibers are synthesized using electrospinning as anodes for lithium-ion batteries (LIBs). The commercial LTO was found to possess large BET surface area (~52 m<sup>2</sup> g<sup>-1</sup>). Besides, the composite fibers exhibit low structural variations during repeated cycling. The stable cyclability of the carbon composite fibers could be attributed to the improvement in conductivity of commercial LTO-nanopowder. The content of LTO in the LTO-carbon composite fiber was about 80 wt%. The assembled coin cells with synthesized fibers deliver an initial discharge capacity of around 125 mA h g<sup>-1</sup> at a current density of 200 mA g<sup>-1</sup>. The long-term cyclability as also noteworthy, as the prepared anode delivers a high discharge capacity of 100 mA h g<sup>-1</sup> after 800 continuous charge/discharge cycles at 200 mA g<sup>-1</sup>. The present strategy can be employed to future composite anodes to obtain enhanced lithium-ion reaction kinetics.
( Jang Soo Han ),( So Dug Lim ),( Won Hyeok Choi ),( Sung Chul Hong ),( Jung Hee Park ),( Eugene Park ),( Mi Jin Hong ),( Cho I Lee ),( Jung Hwan Park ),( Jong Ho Lee ),( Jong Oh Song ),( Young Il Jo 대한신장학회 2013 Kidney Research and Clinical Practice Vol.32 No.1
Immunoglobulin A (IgA) nephropathy associated with cirrhosis is the most common form of secondary IgA nephropathy (IgAN). Cirrhosis-related IgAN is usually clinically silent with a rare occurrence of gross hematuria, unlike in cases of idiopathic IgAN. Especially, acute tubular necrosis (ATN) associated with gross hematuria is very rare in cirrhosis-related IgAN, although acute renal failure is a frequently reported complication in advanced cirrhosis. Herein, we report an unusual case of ATN requiring renal replacement therapy, associated with gross hematuria in a patient with nonalcoholic, hepatitis B virus-associated cirrhosis. Results of a histopathological analysis revealed obstruction of the lumen of renal tubules by red blood cell casts, a marked tubular necrosis, and IgA deposition in the mesangium. The patient`s renal function and gross hematuria were clearly improved after lamivudine treatment.
익상견갑에 대한 전거근 운동 : 증례 보고 1 Case Study
장준혁,구봉오,김선엽 대한정형물리치료학회 2003 대한정형도수물리치료학회지 Vol.9 No.2
Objective: The purpose of this study is to describe the effect of the serratus anterior muscle exercise in a patient with winging of the scapular. Background and Purpose: The patient was a 33-year-old man with an 3 years history of the left deltoid region. He had not responded to previous treatments of rest, TENS and medicine. Materials and Methods: After Surgical operation of the shoulder, the patient was treated for 6 months in 144 visits. treatment consisted of push-up with plus in the standing position with his hands against the wall and unique push-up with quadruped position at mat. Also, Sling exercise therapy was utilized to control scapular stabilization and reduce stress on the scapulohumeral joint. Result: Following 104 physical therapy visits, the patient was able to full range of motion of the shoulder without shrug motion Conclusion and Discussion : Scapular winging and serratus anterior muscle function are important consider in the rehabilitation of the shoulder dysfunction. Therefore, specific exercise program for people with the winging scapular should be considered.
백하수오 에탄올추출물이 방사선조사에 따른 흰쥐의 혈구 및 장기에 미치는 영향
김장오(Jang Oh Kim),최준혁(Jun Hyeok Choi),신지혜(Ji Hye Shin),정도영(Do Young Jung),민병인(Byung In Min) 대한방사선과학회(구 대한방사선기술학회) 2016 방사선기술과학 Vol.39 No.4
방사선 사고 및 방사선 치료 등 방사선에 의한 과피폭의 피해를 줄이기 위해 방사선방호제 개발연구는 활발히 진행되고 있다. 이에 화학적 합성물이 아닌 항산화, 항암, 면역 증강에 효과적인 것으로 알려진 백하수오를 이용하여 방사선방호효과를 확인하였다. 백하수오 에탄올추출물을 Sprague Dawley Rat (SD Rat)에 14일간 1일 1회 경구 투여하고, 7 Gy X-ray를 조사한 후 1일, 4일, 7일, 21일의 시간 변화에 따른 혈구성분, 비장 지수의 변화 및 간과 자궁의 조직변화를 관찰하였다. 실험결과 백하수오 에탄올추출물을 섭취한 실험군의 백혈구 수치(p < 0.05)와 비장 지수(p < 0.05)가 대조군보다 회복이 빠른 것을 확인하였다. 간 조직에서는 핵의 응축, 세포질의 팽창, 염증세포의 침윤이 감소하였으며, 자궁샘 조직은 세포고사가 감소한 것을 확인하였다. 위의 결과를 토대로 백하수오 에탄올추출물은 방사선 조사에 따른 혈구 및 장기의 피해를 줄일 수 있는 새로운 방사선방호제로써 유용할 것으로 기대되며, 방사선 사고와 같은 비상관리 분야에 적절한 시사점을 제공할 수 있다. The development of radioprotector is being actively conducted in order to reduce the damage from over radiation exposure at radiation accident or radiation therapy. So this study was confirmed for radiation protective effects using the Cynanchi wilfordii Radix that has been known to be effective for antioxidant activity, anti-cancer, immune enhancing effects. The method of this study was administered orally Cynanchi wilfordii Radix ethanol extracts to Sprague Dawley Rat(SD Rat) for 14 days once a day, while measuring changed blood cell, spleen index, liver and uterus tissue along the change in time of 1, 4, 7 and 21 days after X-ray beam of 7 Gy irradiation. As the result of the experiment, the experimental group’s rats which are administered with Cynanchi Wilfordii Radix ethanol extracts showed a rapid recovery in white blood cell count(p < 0.05) and spleen index(p < 0.05). In addition, condensation of nuclei, cytoplasmic swelling, and inflammatory cell infiltration in experimental group’s liver cell was decreased more than in irradiation group’s component. Further, experimental group’s Uterine gland decreased the apoptosis more than irradiation group’s components did. It is expected that Cynanchi Wilfordii Radix extracts will be useful as a new radioprotector. With above in mind, this paper may provide appropriate implications with the field of emergency management such as radiation accident.