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3주간의 녹용분말 복용이 신장성운동 후 유발된 근 손상 예방 및 회복에 미치는 효과
정영근(Young-Geun Jung),최현민(Hyun-Min Choi),김종경(Jong-Kyung Kim),노호성(Hosung Nho) 한국생활환경학회 2009 한국생활환경학회지 Vol.16 No.3
Eccentric exercise damaged the skeletal muscle, causing soreness, swelling, tenderness. Exercise induced muscle damage (EIMD) increases possibility of injury and decreases performance of eccentric exercise. Previous studies have been interested in measuring and improving recovery of EIMD, but there have been controversial results. Therefore, the purpose of this study was to investigate the effects of the Cervus elaphus (deer velvet) on recovery of EIMD after eccentric exercise. Twenty female college students participated in this study. Subjects were divided into two groups (Cervus elaphus group and placebo group). The subjects were randomly assigned to either Cervus elaphus group (n=10) or placebo group (n=10). Each group received either Cervus elphus powder (2000 ㎎/day) or placebo capsule (2000 ㎎/day) for 14 days, and then for 7 days after eccentric exercise. For Eccentric exercise knee extensors and flexors were performed by isokinetic dynamometer (Cybex 770) on 15th day, 50 times, 3 sets. CK, GOT, Myglobin and VAS were measured right before eccentric exercise and at first, second, seventh day during recovery. CK and GOT were significantly increased in placebo group after eccentric exercise, while there were no differences in CK, GOT, myoglobin, and VAS between tow groups across the times. It is concluded that Cervus elphus may be effective to reduce muscle damages and improve recovery from eccentric exercise. Further study about functional change after eccentric exercise with a dose of Cervus elphus is needed in the future.
전기방사에 의한 질화붕소 나노분말의 함량에 따른 질화붕소 나노섬유 합성 및 특성 평가
이종혁,전명표,황진아,정영근,주제욱,Lee, Jong Hyeok,Chun, Myoung Pyo,Hwang, Jin Ah,Jung, Young Geun,Chu, Jae Uk 한국전기전자재료학회 2018 전기전자재료학회논문지 Vol.31 No.7
Boron nitride (BN) nanofibers were fabricated using BN nanoparticles (70 nm) by electrospinning. Morphologies such as the diameter and density of the BN nanofibers are strongly influenced by the viscosity and dispersion state of the precursor solution. In this study, the precursor solution was prepared by ball milling BN nanoparticles and polyvinylpyrrolidone (PVP, Mw~1,300,000) in ethanol, which was electrospun and then calcined to produce BN fibers. High-quality BN nanofibers were well fabricated at a BN concentration of 15 wt% with their diameters in the range of 500 nm to 800 nm; the viscosity of the precursor solution was $400mPa{\cdot}S$. The calcination of the as-electrospun BN fibers seemed to be completed by holding them at $350^{\circ}C$ for 2 h considering the TGA data. The morphologies and phases of the BN fibers were investigated by scanning electron microscopy (SEM) and X-ray diffractometry (XRD), respectively; Fourier transform infrared (FT-IR) was also used for structure analysis.