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^(31)P MR Spectroscopy를 이용한 생체내 골격근 섬유대사의 기능적 특성
성기홍 대한스포츠의학회 1996 대한스포츠의학회지 Vol.14 No.1
Human muscles are composed of two fiber types. All the fibers in a motor unit are of the same type, either fast twitch or slow twitch. Fast twitch fibers are fast contracting and fast to fatigue. They are larger, have fewer capiliaries, and seem best suited for short, intense effort. Slow twitch fibers contract somewhat slower but also are slow to fatigue. They have a rich capillary supply and are well supplied with the internal chemistry required for long-duration endurance activities. In the present work, the time course of changes in [pH] during the maxmal intermittent isokinetic exercise of forearm muscle, characterization of phosphorus high energy metabolism on human skeletal muscle fiber function, were measured by in vivo 31^P MR Spectroscopy. Characterize of phosphorus high energy metabolism on human skeletal muscle fber function by observing different time coures or changes in [pH]. Subjects were ordered to do the forcearm flexion exercise. Well trained oarsmen (n=6) were subjected to a series of 90, 180 seconds of exercises intervaled by 1 minute of resting period until 20 minutes passed the all-out. As the results. 1. The suddenly decreaseing [Low-pH] observed during the exercise by the oarsmen by the oarsmen may indicate that the exercise can be categorized as the fast twitch muscle. 2. The plateau achieved in the time course of [High-pH] during the exercise by the oarsmen may indicate that the exercise can be categorized as the slow twitch muscle. This invasive procedure give only fragmentary and instantaneous information and is in appropriate for frequent follow up in the same individual. In vivo 32^P MR Spectra is a noninvasive thechnique allowing frequent reinvestigation in the same subject without harm. The usefulness of this technique in the study of exercise physiology was evidenced earlied.
In Vivo ^31P NMR Spectroscopy를 이용하여 젖산 운동시간과 유산소 운동시간에 따른 골격근 섬유의 고 에너지 인(P) 대사 변화
성기홍,임태환,이대근,문치웅,이정희,김상태,신명진,이덕분 대한스포츠의학회 1994 대한스포츠의학회지 Vol.12 No.1
Intracellular high energy phosphorus metabolism can be assessed noninvasively and dynamically by in vivo ^31P NMRS of skeletal muscle have shown various applications of this technique in evaluating the pathophysiology of diseased or normal muscles. High energy phosphate metavolsim in the human skeletal muscle was studies in the work. ^31P nuclear magnetic resonance spectroscopy allowed the evaluate of the lactic acid and aerobic energy system in the intracellular skeletal muscle by energy concentration of ^31P nuclear magnetic resonance spectroscopy allowed the evaluate of the lactic acid and aerobic energy system in the intracellular skeletal muscle by energy concentration of ^31P metabolite, (Pi), (PCr), (ATP). The ratio of Pi/PCr the spectra measured from normal volanteers and elite athleties indicated a signetifcant difference between the two group for each exercise protocal. It was generally ovserved that the all out time of normal volunteers in shorter that that of elite athletes, and the ration of Pi/PCr is samller for elite athlets than for normal volunteers.
성기홍,방상식,정일규,김양수,김명화,이덕분 대한스포츠의학회 1994 대한스포츠의학회지 Vol.12 No.1
The purpose of this study was to determine the physical performance take BAE-ESCARGOT. This study were obtained from pretest (before test) to posttest (after 4 weeks test) and graded exercise by ergometer. Subjects were 7 males elite athletes. BAE-ESCARGOT to be taken three times a day after each meal. Results were as follow: 1. BAE-ESCARGOT don't delaied exercise time (P<0.05). 2. BAE-ESCARGOT don't increased exercise capacity (P<0.05). 3. BAE-ESCARGOT were significant from swimming and 100rm record (P<0. 05). 4. BAE-ESCARGOT were significant from VO_2 max but were not insignificant from heart rate (P<0.05). 5. BAE-ESCARGOT were not accumulated from vein lactate and capillary lactate (P<0.05). 6. BAE-ESCARGOT were increased of CK from exercise capacity (P<0.05).
성기홍 한국방사선산업학회 2015 방사선산업학회지 Vol.9 No.4
When reactor coolant leaks occur due to cracks of a steam generator’s tube, radioactivematerials contained in the primary cooling water in nuclear power plant are forced out towardthe secondary systems. At this time the secondary water purification resin in the ion exchangeresin tower of the steam generator blowdown system is contaminated by the radioactivity ofthe leaked radioactive materials, so we pack this in special containers and store temporarilybecause we could not dispose it by ourselves. If steam generator tube leakage occurs, it producescontaminated spent resins annually about 5,000~7,000 liters. This may increase the amount ofnuclear waste productions, a disposal working cost and a unit price of generating electricity inthe plant. For this reasons, it is required to develop a decontamination process technique forreducing the radioactive level of these resins enough to handle by the self-disposal method. In thisresearch, First, Investigated the structure and properties of the ion exchange resin used in a steamgenerator blowdown system. Second, Checked for a occurrence status of contaminated spent resinand a disposal technology. Third, identified the chemical characteristics of the waste radionuclidesof the spent resin, and examined ionic bonding and separation mechanism of radioactive nuclearspecies and a spent resin. Finally, we carried out the decontamination experiment using chemicals,ultrasound, microbubbles, supercritical carbon dioxide to process these spent resin. In the caseof the spent resin decontamination method using chemicals, the higher the concentration of thedrug decontamination efficiency was higher. In the ultrasound method, foreign matter of thespent resin was removed and was found that the level of radioactivity is below of the MDA. In themicrobubbles method, we found that the concentration of the radioactivity decreased after theexperiment, so it can be used to the decontamination process of the spent resin. In supercriticalcarbon dioxide method, we found that it also had a high decontamination efficiency. Accordingto the results of these experiments, almost all decontamination method had a high efficiency, butconsidering the amounts of the secondary waste productions and work environment of the nuclearpower plant, we judged the ultrasound and supercritical carbon dioxide method are suitable forapplication to the plant and we established the plant applicable decontamination process systemon the basis of these two methods.