• Korean Journal of Plant Tissue Culture
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• v.21 no.2
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• pp.123-129
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• 1994

The potency of adventitious root initiation was investigated in relation with germination days and ike end of culture days healed with root induction medium on the initiation of adventitious roots from explants of soybean (Glycine max L.) cotyledon. Also, the changes in the pattern of protein profiles related with adventitious mot initiation have been examined by two-dimensional polyauyl-amide gel elecoophoresis during the germination and the initiation of adventitious roots. The potency of adventitious root initiation from germinated cotyledons was high after 4 days, and adventitious roots were initiated from after 4 days and very high after 6 days healed with mot induction medium There was a reproducible quantitative change in 34 specific protein spots during germination and adventitious root initiation. A necessary basic protein for adventitious root initiation with rotative molecular weight of 27 kD was induced during the germination. And three basic protein groups with relative molecular weight 22 kD, 23 kD and 33 kD, and two acidic protein groups with relative molecular weight 27kD and 29 kD were induced during the initiation of adventitious roots.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.6 no.1
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• pp.59-65
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• 2012

In this study, muscle fatigue of biceps and triceps during isometric exercise depending on concentric contraction and eccentric contraction was evaluated using EMG. 12 healthy male volunteers was performed concentric exercise and eccentric exercise by maximum flection and extension of elbow joint. Integrated EMG (IEMG) in time domain and mean power frequency (MNF) in frequency domain were calculated. MNF of the biceps and triceps was decreased, whereas IEMG was increased during concentric contraction and eccentric contraction. But muscle fatigue index appeared higher at region of stretched muscle length. in this result, muscle fatigue occurs at both biceps and triceps muscle during concentric and eccentric exercise, and muscle fatigue was affected by muscle contraction and extension.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.10 no.1
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• pp.81-86
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• 2016

The purpose of this study was to investigated the muscle activity difference of lower extremity by abdominal co-contractive activation. 30 healthy women without pain in the low back and lower extremity were conducted. Muscle activities of lower extremity were measured with the active straight leg raise (ASLR) in 20cm raised from the floor without bending the knee at rest, abdominal drawing-in maneuver (ADIM) and abdominal bracing maneuver (ABM), respectively. Hip adductor longus (HadL), rectus femoris (RF), and biceps femoris (BF) muscle activity in the Abdominal bracing maneuver were statistically significantly higher, also gluteus medius (Gmed) and tibialis anterior (TA) muscle activity in the ADIM were higher. We provide the evidence to the positive effects of individual abdominal co-contractive activation training which can enhance postural stability and lower extremity strengthening with volitional preemptive abdominal contraction.

• Journal of Oral Medicine and Pain
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• v.24 no.1
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• pp.49-58
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• 1999

저자는 하악의 위치변화가 저작근에 미치는 영향을 근전도학적으로 평가하고자, 측두하악장애의 징후와 증상이 없는 정상성인 28명을 대상으로 중심위 교합장치(centric relation splint), 중심교합위 교합장치(centric occlusion splint), 전방 재위치 교합장치(anterior repositioning splint)를 장착시킨 상태에서 하악의 중심의, 중심교합위, 전방위률 유도한 후 최대 이악물기 상태의 좌우측 교근 및 전측두근의 근전도를 채득, 분석, 평가한 결과 다음과 같은 결론을 얻었다. 1. 전측두근에서 하악의 위치변화에 따른 최대 근활성도의 차이가 나타났으나(p<0.05), 교근에서는 나타나지 않았다. 2. 전측두근의 경우 중심교합위에서 최대 이악물기 상태의 최대 근활성도는 교합 장치물을 장착하지 않은 경우 및 중심위에서와 비교하여 감소하였다(p<0.05). 3. 전측두근의 경우 전방위에서 최대 이악물기 상태의 최대 근활성도는 교합 장치물을 장착하지 않은 경우 및 중심위에서와 비교하여 감소하였다(p<0.001). 4. 교근과 전측두근의 좌우 비대칭지수(asymmetry index)는 하악의 위치변화에 따른 차이가 나타나지 않았다.

• 월간산업보건
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• s.249
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• pp.19-32
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• 2009

이 역학조사는 J피혁 토글 공정 근로자 중 일부에서 손가락 관절이 휘는 등 근골격계 질환 의심자가 발견되어 위 증상과 작업내용의 상관관계를 규명하기 위하여 노동부가 산업안전보건연구원에 역학조사를 의뢰하여 조사를 시행하였다. 본 조사의 목적은 첫째로 역학조사 의뢰내용인 근골격계 질환 의심자의 작업과의 관련성 규명이며, 둘째로 근골격계 증상 조사와 진찰을 통해 근골격계 질환의 진단과 작업환경 개선안을 도출하며, 넷째로 대상 사업장의 근골격계 질환 예방관리 프로그램을 구축하는데 있다.

• Bulletin of the Korean Institute for Industrial Safety
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• v.3 no.1
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• pp.1-5
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• 2003

작업관련 근골격계 질환은 최근 사업장의 집단적인 발병, 산업재해자수의 급증 등으로 인하여 주된 문제가 되고 있다. 특히, 자동차, 선박 등의 제조업에서 이러한 문제는 노사간의 갈등을 야기하는 주 요인으로 작용하여 사회적 이슈로 대두되었다. 이러한 산업재해 율 증가는 근골격계질환의 뇌심 혈관질환 등 작업관련성질환이 주도하고 있는 현상이다. 특히, 단순반복작업, 중량물 취급작업, 부적절한 작업자세 등에 의하여 신체에 과도한 부담을 주었을 때 나타나는 요통, 경견완장해 등 근골격계 질환은 매년 급증하고 있으며 향후에도 지속적인 증가가 예상된다. 이로 인하여 생산성 저하, 근로의욕저하, 품질저하 등으로 경영손실은 물론 직접 의료비의 부담이 커지고 있는 실정이다. 이와 동시에 근골격계 질환에 대한 직원들의 보상과 작업조건 개선에 대한 요구는 점차 증가하고 있고, 가장 중요한 노$.$사간의 쟁점사항으로 부각되고 있다. 정부에서는 근골격계 질환 예방대책으로 '근골격계 부담 작업으고 인한 건강장해예방' 편을 입법화를 하였으며 근골격계 예방팀을 구성하여 대책 마련에 고심 중에 있다.(중략)

• Journal of Plant Biotechnology
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• v.30 no.1
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• pp.65-71
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• 2003

This research aims the production of anti-tumor substances through in vitro culture of hairy roots transformed by Agrobacterium rhizogenes in Artemisia sylvatica MAX and the effect of culture conditions on optimum growth of hairy roots. We investigated the optimum medium, pH, carbon source, sucrose, light, Fe and polyamine conditions of various lines of hairy roots (NK3, NK4, YX. NK3-10) induced from Artemisia sylvatica to increase the optimum growth of hairy roots. MS medium was the best for optimum growth of hairy root clone, NK3-S10. The optimum culture period was 4 weeks for NK3-S10. The optimum sucrose concentration was 3.5%. The optimum concentration of FeSO$_4$, spermine and spermidine was 0.1 mM, 10 mM and 100 mM, respectively.

• Journal of the Korea institute for structural maintenance and inspection
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• v.17 no.6
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• pp.112-121
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• 2013

FRP reinforced lightweight concrete structures can offer corrosion resistance and weight reduction effect simultaneously, so practical use of the structures may be expected afterwards. But to make concrete structures using lightweight concrete and FRP bar, that can resist external forces without internal slip of the FRP bar, it is very important to understand bond characteristic between lightweight concrete and FRP bar. During that time, a lot of studies for bond behaviors of FRP bar in normal concrete were conducted, but studies for bond behavior of FRP bar in lightweight concrete are very limited to date. So, bond characteristic between lightweight concrete and helically deformed GFRP bar was investigated in this study. Three main parameters were considered in experimental investigation: type of rebar, concrete type, and compressive strength of lightweight concrete. As an experimental result, it could be known that bond strength of helically deformed GFRP bar in lightweight concrete was 0.49 times bond strength of steel reinforcement in normal concrete.

• Journal of the Korean Society of Food Science and Nutrition
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• v.21 no.6
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• pp.712-718
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• 1992

This experiment was carried out to investigate some physico-chemical properties of myofibrillar proteins isolated from alkaline and acid rigor muscles of rabbit. The degree of fragmentation was about 0.35 at 3 days of postmortem in acid rigor muscle fiber, whereas it was only 0.3 at 7 days of postmortem in alkaline rigormuscle fiber. $Mg^{2+}$-activated ATPase activities of actomyosin were increased to the highest level at 1st day in acid rigor and at 3rd day in alkaline rigor muscle fiber. $Ca^{2+}$-activated ATPase activities of actomyosin were slightly increased at postmortem. $Mg^{2+}$-, and $Ca^{2+}$-activated ATPase activities were higher in alkaline rigor muscle than those in acid rigor muscle at postmortem. Solubility of actomyosin increased with postmortem but no differences were observed in rigor types. SDS-PAGE(sodium dodecyl sulfate polyacrylamide gel electrophoresis) band patterns of myofibrils did not show significant differences between rigor types, but newly 30.000 dalton proteins were appeared at 3 day postmortem in both rigor types.

• Journal of Convergence for Information Technology
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• v.7 no.4
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• pp.159-164
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• 2017

The aim of this study was to investigate the effects of scapular dynamic stabilization exercise(SDex) with electromyography(EMG) biofeedback on the upper trapezius(UT), pectoralis major(PM) and serratus anterior(SA) activities. Fifteen healthy male voluntarily participated in this study. A paired t-test was used for statistical analysis. The study showed, through EMG biofeedback, that EMG activity significantly decreased in the UT, PM and increased in the SA(P<0.05). These results suggest that SDex with EMG biofeedback is effective to selectively strengthen the SA. This article is meaningful in that it is the first article using SDex with EMG biofeedback.