크레아틴 로딩이 지구운동 및 스프린트 파워발휘에 미치는 효과

오이표,김희수,이신언 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5

A study was conducted on the effect f creatine loading on persistent exercise and outcome in sprint which was performed immediately after such exercise and subjects of this study were 12 cycle load athletes. Persistent exercise for the purpose of experiment was carried out for 2 hours and 30 minutes. Then it was continued until the condition of tiredness and exhaustion was reaching with showing density of lactate in blood of 4mmol/ℓand then immediately thereafter for 10 seconds 5 sets maximum sprint were carried out. The subject athletes carried out C Performance which featured absorption of placebo liquid during the exercise involving creatine loading prior to experiment exercise, CC Performance featuring absorption of creatine liquid during the exercise involving creatine loading and P Performance featuring absorption of placebo liquid during the exercise without creatine loading-thus totally 3 Performances were carried out. Comparing with P Performance C Performance showed significant improvement in all the 5 sets in terms of peak power and average power for maximum sprint. On the other hand in CC Performance it was same as P Performance. Creatine loading and creatine absorption liquid did not have any effect on duration of persisting exercise until reaching to fatigue and exhaustion. From the result of this study it could be observed that creatine loading improved maximum sprint ability within a short period of time after persistent exercise leading to fatigue and exhaustion However such effect declined when creatine liquid was absorbed during the exercise.

Gerbera(Gerbera hybrida Hort)의 형태적 특징과 유전적 유연관계 분석

김현애,임현희,양원진,이재헌,이병영,이용문,권오창 동아대학교 농업생명과학연구소 2001 農業生命資援硏究 Vol.10 No.1

This study was conducted to analyze the morphological characteristics and genetic relationships among 24 species of Gerbera. Most of flower colors were pink. The numerical order of flower color was pink, orange, red, double-colored, and milk-white. Majority of flower types were single or semidouble flowers. A few species were double flowers. Flower diameters were from 7cm to 12cm, showed significant differences compared to other characteristics. Flower stalks were ranged from 55cm to 65cm. Only one species was the shortest as 55cm. The others were similar size as about 65cm. Main annual production yields were between 190 and 400 blossoms. Fifty seven reproducible polymorphic bands from eighty primers were used for analyses of genetic similarity. The genetic similarity of 24 collected Gerberas was largely classified into five groups. The average similarity coefficient was 0.72 ranged from 0.50 to 0.90. The highest similarity coefficient was shown between 'Sardana' with red/white flower color and double flower type, and 'Tamara' with orange flower color and double flower type as 0.90.

600합금의 미세조직 변화 및 SCC거동에 미치는 Ce 첨가의 영향

권오철,이용선,임연수,정만교,김정수 대한금속재료학회 2005 대한금속·재료학회지 Vol.43 No.1

High purity model alloys with major composition Ni-15Cr-9Fe-0.03C (600CEO) and Ni-15Cr-9Fe-0.03C-0.04Ce (600CE4) were produced. Using these model alloys the effect of alloying element Ce on the SCC behavior of Alloy 600 was evaluated in a caustic solution. To obtain carbides precipitated on grain boundaries, the thermal treatment was performed on both the solution annealed model alloys. Microstructural examinations using SEM and TEM EDX showed that the same structural carbides, Cr_(7)Cc₃, were precipitated on both the alloys and no significant difference in the amount of Cr depletion along grain boundaries was observed between the two model alloys. However, it was shown that the coverage of grain boundary carbides was higher in the Ce-bearing alloy (600CE4). The SCC susceptibility of the alloys was investigated in 40%NaOH solution at 315℃. Being evaluated in terms of the maximum crack depth, the SCC susceptibility of the alloy turned out to be reduced by the addition of Ce. The increased resistance to the SCC in the alloy 600CE4 was considered to be attributable to the increased coverage of grain boundary carbides. (Received September 30, 2004)

테이핑이 발목의 관절가동범위와 고유수용성감각에 미치는 영향

김창인,권오윤,이충휘 한국전문물리치료학회 2001 한국전문물리치료학회지 Vol.8 No.3

This study was designed to determine the effect of ankle taping and short period of walking on the treadmill on the range of motion (ROM) and proprioception at the ankle joint. Twenty healthy male subjects (mean age=24.2 yr) participated in this study. Goniometry and videotape replaying method were used to measure the ankle ROM. Passive sagittal and frontal plane motions were measured. The difference in degree between the stimulus point and the reproduced point was defined as an angular error. The measurements were performed at four different phases: pre-taping (PRT), post-taping immediately (POT), post-5 minute walking with taping (P5M), and post-10 minute walking with taping (P10M). The ankle of dominant limb was taped by a certified athletic trainer using a closed basket weave technique. Participants walked on the treadmill at 2.5 mph. The results showed that the mean of the sagittal plane motion at PRT, POT, P5M, and P10M was 53.0, 30.5, 36.2, and 40.2 degrees, respectively. The frontal plane motion at PRT, POT, P5M, and P10M was 33.6, 13.9, 15.7, and 18.6 degrees, respectively, The angular error at PRT, POT, P5M, and P10M was 5.5, 1.6, 1.8, and 1.9 degrees, respectively. After 10 minutes of walking, the sagittal plane motion and frontal plane motion was increased by 9.7 and 4.7 degrees compared with POT, respectively. The proprioception was significantly improved alter the application of ankle taping. Both the restriction of frontal plane motion and proprioception improvement at the ankle joint may contribute to ankle stability during walking.

지구운동 후의 식사조성이 근중성지방과 지구운동의 성과에 미치는 효과

이신언,오이표,김한수 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5

This study was carried out for the purpose of examining the effect of eating on muscular neutral fat and outcome of persistent exercise. Seven men who were taking persistent training had 2 hours of cyclying exercise at an intensity of 65%VO₂max, Thereafter the examinees took meals containing high level of sugars and fats and then carried out 1600kJ by self pace after fasting 12 hours. In the Performance taken 2 hours before starting cycling training (33.0+/- 2.3 vs. 37.0 +/- 2.1mmol/㎏ dry weight ) and in the Performance taken thereafter (30.9+/- 2.4 vs. 32.8+/- 1.6 mmol/㎏ weight) there was no difference in muscular neutral fat. However eating more fatty food showed higher value of muscular neutral fat prior to 2nd self paced exercise in comparison with taking more sugary food. (44.7+/- 2.4 vs. 27.5+/- 2.1 mmol/㎏ dry weight). In terms of outcome of self-paced cycling training Performance where highly fatty food was taken showed significant decline, This outcome did not show any significant change in muscular neutral fat before and after cycling training of medium level intensity but it was observed that absorption of highly fatty food heightened accumulation of muscular neutral fat rather than taking highly sugary food.

잉어류 바이러스성전신괴사증바이러스 (VSNCV) 백신 투여에 대한 잉어의 면역반응

조미영,손상규,김이청,김진우,오명주,정성주,박수일 한국어병학회 2003 한국어병학회지 Vol.16 No.3

양식 잉어류에서 심각한 피해를 야기하고 있는 VSNCV에 대한 백신을 제작하며 잉어에 투여한 후 특이적 및 비특이적 면역반응을 조사하였다. 백신은 포르마린처리백신 (FKV)과 가온처리백신 (HKV)를 제작하여 건강한 잉어에 0.2㎖씩 복강주사 하였으며, 2주 후 동일한 방법으로 boost처리하였다. 백신 투여 후 비특이적 면역반응 중 혈청 라이소자인 활성과 대식세포의 chemiluminescent (CL) reponses은 1차 주사 후 및 boost 처리 후 2일째부터 7일째까지 유의적인 증가를 나타내었으며, 이후 대조구 수준으로 감소하였다. ELISA법으로 항체가를 조사한 결과 대조구를 제외한 FKV와 HKV 투여구에서 주사 후 2주 째부터 boost처리 후 6주 째까지 유의적으로 증가하였으며, 그 중에서도 boost 처리 후 2주 째에 VSNCV로 공격 실험한 결과 FKV 투여구에서는 20%의 누적폐사율을 나타내어 방어력이 인정 되었으나, HKV투여구에서는 70%의 누적폐사율이 나타나 방어효과가 거의 없는 것으로 나타났다. VSNC is a viral disease causing significant economic losses in cultured carp Ciprinus carpio L. in Korea. Carps were immunized with prepared vaccines against VSNCV and examined specific and nonspecific immune responses. Carps were injected by 0.2㎖ of formalin-killed vaccine(FKV), heat-killed vaccine(HKV) or E-MEM, respectively and dealt with boost with same way two weeks later. The lysozyme activity of serum and chemiluminescent reponses of head-kidney leucocytes showed increased responses during 2-7 days post-first injection(pfi) and post-boost(pb) in the vaccinated fish, and then decreased to the level of control. As measured by ELISA, vaccinated groups showed a significant increase in VSNCV-specific serum antibodies between 2 weeks pfi and 6 weeks pb with a peak at 2 weeks pb. Results of the virus challenge showed that the fish vaccinated with FKV have induced protective immunity, white HKV injection hardly provided protection.

골반 자세 변화에 따른 일어서기동작의 운동형상학적 분석과 근전도 연구

최종덕,권오윤,이충휘,김종만,김진경 한국전문물리치료학회 2003 한국전문물리치료학회지 Vol.10 No.2

The purpose of this study was to analyze the effects of three different pelvic tilts on sit-to-stand ativities and to suggest a new therapeutic approach for movement reeducation in patients who have difficulty with sit-to-stand activities. The three different pelvic tilts were: (1) comfortable pelvic tilt sit-to-stand (CPT STS), (2) posterior pelvic tilt sit-to-stand (PPT STS) and (3) anterior pelvic tilt sit-to-stand (APT STS). To analyze the kinematic component of STS, a motion analysis system (Zebris) was applied to the ankle, knee, hip joint, and thigh-off area. Also, to determine the onset time of muscle contraction, surface electrodes were placed to the rectus femoris muscle (RF), the vastus lateralis muscle (VL), the biceps femoris muscle (BF), the tibialis anterior muscle (TA), the gastrocnemius muscle (GCM), and the soleus muscle (SOL). One-way repeated ANOVA was used for the statistical analysis. First, significant differences were found in kinematic variables for the hip, knee, ankle joint, and thigh-off among the three activities. Second, there was significant difference in muscle activation pattern in TA, VL. and BF among three activities. In conclusion, the findings of this study suggest the following evaluative and therapeutic approach for STS activity: (1) Changes in knee and ankle joints should be prioritized and recruitment order differences in VL and RF can be generated to accomplish abnormal STS activity. (2) APT STS can be introduced for movement efficiency and functional advantage when abnormal STS is treated.

골반 자세 변화에 따른 일어서기의 기능적 연결분석의 접근

최종덕,권오윤,이충휘,김종만,김진경 한국전문물리치료학회 2003 한국전문물리치료학회지 Vol.10 No.2

The purpose of this study was to analyze the effects of three different pelvic tilts on a sit-to-stand (STS) and to suggest a new assessment approach based on biomechanical analysis. The three difrent pelvic tilts were: (1) comfortable pelvic tilt sit-to-stand (CPT STS), (2) posterior pelvic tilt sit-to-stand (PPT STS) and (3) anterior pelvic tilt sit-to-stand (APT STS). To determine the onset time of muscle contraction surface electrodes were applied to the rectus femoris muscle (RF), vastus lateralis muscle (VL), biceps femoris muscle (BF), tibialis anterior muscle (TA), gastrocnemius muscle (GCM), and soleus muscle (SOL). The ICC was used for functional linkage analysis. The findings of this study were as follows. First, significant differences were found in kinematic variables and in muscle activation pattern among the three activities. Second, the results of functional integrated analysis revealed that recruited muscle activation patterns changed when the thigh-off was viewed as a reference point. Third, there were independent functional units between the thigh-off and the VL and between the thigh-off and the RF in the functional linkage analysis. The VL and RF acted as prime mover muscles, and more postural adjustment muscle recruitment was required as the demand of postural muscle control increased (PPT STS, APT STS, and CPT STS in order). In conclusion, the findings of this study suggest the following evaluative and therapeutic approach for STS activity. APT STS can be introduced for movement efficiency and functional advantage when abnormal STS is treated. However, excessive APT would change the muscle activation patterns of BF and SOL and require additional postural muscle control to cause abnormal control patterns.

Revealing Joseon period People’s single nucleotide polymorphism associated with lactase gene by ancient DNA analysis of human remains from archaeological sites in Korea

Chang Seok Oh(Chang Seok Oh),Myeung Ju Kim(Myeung Ju Kim),Yi-Suk Kim(Yi-Suk Kim),Sori Min(Sori Min),Kyong Taek Oh(Kyong Taek Oh),Soong Deok Lee(Soong Deok Lee),Dong Hoon Shin(Dong Hoon Shin) 대한해부학회 2023 Anatomy & Cell Biology Vol.56 No.1

Lactase non-persistence (LNP), one of the causes of lactose intolerance, is related to lactase gene associated single nucleotide polymorphisms (SNPs). Since the frequency of LNP varies by ethnic group and country, the research to reveal the presence or absence of LNP for specific people has been conducted worldwide. However, in East Asia, the study of lactase gene associated SNPs have not been sufficiently examined so far using ancient human specimens from archaeological sites. In our study of Joseon period human remains (n=14), we successfully revealed genetic information of lactase gene associated SNPs (rs1679771596, rs41525747, rs4988236, rs4988235, rs41380347, rs869051967, rs145946881 and rs182549), further confirming that as for eight SNPs, the pre-modern Korean people had a lactase non-persistent genotype. Our report contributes to the establishment of LNP associated SNP analysis technique that can be useful in forthcoming studies on human bones and mummy samples from East Asian archaeological sites.

Optimal Dietary Protein and Lipid Levels for Growth of Long-nosed Barbel, Hemibarbus Longirostris

Yi Oh Kim,Gyu Deok Hwang,Sang Min Lee 한국수산과학회 2009 Fisheries and Aquatic Sciences Vol.12 No.4