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양영석,강영호,정경락 ( Yeong Seok Yang,Young Ho Kang,Gyeong Rak Jheong ) 한국공업화학회 1993 공업화학 Vol.4 No.1
원자로 냉각계통의 방사성 오염물질을 제거하기 위한 제염공정에서 유기산에 용해된 금속이온들은 이온교환 수지를 통과하면서 제거된다. 그러나 제염용액내 유기산들은 용액내 금속이온과 착화합물을 형성하여 이온교환수지에 대한 친화도를 감소시킨다. 이같은 관점에서 착화합물 형성이 이온교환공정에 미치는 영향 해석을 위해 코발트와 철 이온을 대상으로 Amberlite IRN-77 양이온수지와의 이온교환실험을 수행하였다. 실험결과에서 화학제염제로 사용된 유기산 가운데 EDTA는 철 이온보다 코발트 이온과 강한 착화합물을 형성하여 코발트 이온의 수지에 대한 이온교환용량을 현저히 감소시켜 주는 성분으로 나타났다. 반면에, Oxalic Acid와 Citric Acid의 영향은 미미하였다. 또한, 실험결과로부터 이들 금속이온들에 대한 단일 성분계 및 2성분계 비선형 평형식을 결정하였다. In decontamination process to remove radioactive materials of reacter cooling system, the metal ions dissolved by organic acids in decontamination solution are separated by use of ion exchange resin in the colunm. However, organic acids in decontamination solution decrease the apparent affinity of the resin to metal ions. In light of this, some experiments were carried out on the Amberlite IRN-77 cation resin with cobalt and iron to gain a better understanding of the complexation effects on the ion exchange process. Experimental results showed that EDTA among organic acids used as chemical decontaminants predominantly caused reduction of ion exchange capacity of cobaltous ion to resin since this reagent formed the complex with the cobaltous ion stronger than that with the ferrous ion. In contrast, the effects of oxalic acid and citric acid were found to be negligible. And, single and two-component nonlinear equilibrium relationships of the metal ions were established using experimental data.
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테이핑이 맨몸 하프 스쿼트 세트에 따라 %MVIC에 미치는 영향
이경순(책임저자) ( Kyung Soon Lee ),강영호 ( Gyeong Ho Kang ),김가희 ( Ga Hui Kim ),이재송 ( Jae Song Lee ),이현지 ( Hyeon Ji Lee ),전진영 ( Jin Yeong Jeon ),정은식 ( Eun Sik Jeong ),조성희 ( Seong Hui Jo ),최태근 ( Tae Geun Choi ) 대한신경치료학회 2015 신경치료 Vol.19 No.2
Purpose This study is intended to examine an effect that taping has on %MVIC according to bodyweight half squat set exercise. Methods Participants in this study are composed of 10 male college students. Rectus femoris and erector spinae was measured by using surface electromyography. SPSS(version 20) was used through normalization process for electromyography data collected before ? after taping. And a paired t-test was used for comparison between before and after taping treatment, and one-way repeated measures ANOVA was used for comparison between sets. Statistical significance level was fixed at .05. Results Statistically significant difference was not shown in comparing MVIC befor e·after the treatment of taping applied on the rectus femoris and erector spinae. A statistically significant decrease was shown in muscle strength after taping in comparing %MVIC before·after the treatment of taping applied on the rectus femoris and erector spinae. A statistically significant increase was shown in %MVIC value in comparison between sets before the treatment of taping applied on rectus femoris No statistical difference was shown in %MVIC value according to each set before the treatment of taping applied on erector spinae. No statistical difference was shown in %MVIC value according to each set after the treatment of taping applied on erector spinae. Conclusion In comparison between before and after the treatment of taping applied on rectus femoris in bodyweight half squat, the taping was efficacious, and the efficacy of taping was shown in comparison between bodyweight half squat sets as well. The efficacy of taping was shown in comparison between before and after the treatment of taping applied on erector spinae. However, the efficacy of taping was not shown in comparison between sets. Accordingly, a change in the muscle strength of erector spinae requires experimental design where it is loaded with weight or the number of sets is increased.
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