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      • 무용전공학생의 호흡순환기능 및 혈중젖산농도에 관한 비교연구

        이종희,김말애,손흥기,김민정 경희대학교 체육과학연구소 1996 體育學論文集 Vol.24 No.-

        The purpose of this study is to investigate the cardiovascular function and blood lactate in female by part of dance major in university. For this purpose a total of 32 female students, attending university K in Seoul participated in the study. The subjects were selected randomly 24 female students majored in dance in university(Korean dance: 8, Modern dance: 8, Ballet: 8), and 8 regular female students, who did not have any dance experience. The results of the study were as follows; 1.Cardiovascular function 1)In factors of rest HR showed in Control group 76.50±3.74 beats/min, Korean dance group 72.13±4.85 beats/min, Modern dance group 71.50±4.93 beats/min, Ballet dance group 68.8±4.19beats/min. Among these group there was significantly(p〈.05). 2)In factors of HRmax showed in Korean dance group 200.63土4.78 beats/min, , Ballet dance group 198.00±6.28beats/min, Modern dance group 197.63±6.65beats/min Control group 189.75±10.51beats/min. Among these group there was significantly(p〈.05). 3)In factors of VO2/kg showed in Ballet dance group 44.46±4.09㎖/min, Korean dance group 43.95±2.95㎖/min, Modern dance group 40.73±3.26㎖/min, Control group 34.33±2.28㎖/min. Among these group there was significantly(p〈.001). 4)In factors of VCO2 showed in Korean dance group 84.31ℓ/min, Modern dance group 2.60±0.44ℓ/min, Ballet dance group 2.52±0.23ℓ/min, Control group 2.23±0.34ℓ/min. Among these group there was not significantly. 5)In factors of art-out time showed in Korean dance group 931±52.92sec, Modern dance group 916.75±40.96sec, Ballet dance group 908.88±28.44sec, Control group 809.38±70.02sec. Among these group there was significantly(p〈.001). 2.Blood lactate 1)In factors of rest time blood lactate showed in Ballet dance group 1.17±0.26.mM/ℓ, Control group 1.11±0.21mM/ℓ , Korean dance group 1.09±0.28mM/ℓ , Modern dance group 1.06±0.33mM/ℓ Among these group there was not significantly. 2)In factors of all-out time blood lactate showed in Control group 9.14±0.92mM/ℓ, Ballet dance Broup 7.79±1.14mM/ℓ, Korean dance group 7.67±1.51mM/ℓ, Modern dance group 7.42±1.18mM/ℓ, Among these group there was not significantly. 3)In factors of recovery 3 minute blood lactate showed in Control group 9.52±0.94mM/ℓ, Ballet dance group 7.68±1.73mM/ℓ, Modern dance group 7,61±0.89mM/ℓ, Korean dance group 7.52±1.78mM/ℓ. Among these group there was significantly(p〈.05). 4) In factors of recovery 5 minute blood lactate showed in Control group 9.91±1.22mM/ℓ, Korean dance group 7.97±2.38mM/ℓ, Ballet dance group 7.86±1.86mM/ℓ, Modern dance group 7.51±1.10mM/ℓ, Among these group there was significantly(p〈.05). 5)In factors of recovery 10 minute Control group 8.99±0.97mM/ℓ, Ballet dance group 6.98±1.65mM/ℓ, Korean dance group 6.96±2.08mM/ℓ, Modern dance group 6.78±1.38mM/ℓ, Among these group there was significantly(p〈.05).

      • KCI등재

        초음파 주파수 및 반응조건 변화에 따른 나프탈렌 분해효율과 OH 라디칼의 발생량 비교

        박종성(Jong Sung Park), 박소영(So Young Park), 오재일(Jei Ll Oh), 정상조(Sang Jo Jeong), 이민주(Min Ju Lee), 허남국(Nam Guk Her) 大韓環境工學會 2009 대한환경공학회지 Vol.31 No.2

        나프탈렌은 휘발성이 있는 소수성 물질로 발암유발 가능성이 있고, 수생태계에 심각한 영향을 미친다. 본 연구는 초음파의 주파수 및 반응조건별 나프탈렌 분해효율과 OH 라디칼 변화량을 조사하였다. C-18 역상칼럼을 이용한 LC/FLD (1200 series, Agilent)로 나프탈렌을 분석한 결과 MDL (Method detection limit)은 0.01 ppm이었다. 초음파 조사 동안 휘발된 나프탈렌은 거의 검출되지 않았고(0.05 ppm 이하), 반응조 덮개 개폐별 나프탈렌 분해효율은 거의 차이를 보이지 않았다(1% 이내). 초음파 반응온도가 증가할수록 나프탈렌 제거효율은 감소하는 경향(15℃: 95%→40℃: 85%)을 보였고, pH가 낮을수록 나프탈렌 분해효율이 증가(pH 12: 84%→pH 3: 95.6%)하였다. 나프탈렌 초기농도의 감소에 따라 반응속도는 증가하는 경향을 보여주었다(2.5 ppm: 27.3×10(-3) min(-1), 5 ppm: 22.7×10(-3) min(-1), 10 ppm: 19.0×10(-3) min(-1)). 동일한 초음파 조건(2.5 ppm 나프탈렌, 0.075 W/mL, 20℃, pH 6.8)에서 28 kHz의 분해효율이 132 kHz보다 약 1.46배 높았고(132 kHz: 56%, 28 kHz: 82.7%), 유사 일차반응 속도상수(k1)도 약 2.3배 높게 나타났다(132 kHz: 2.4×10(-3) min(-1), 28 kHz: 5.0×10(-3) min(-1)). 초음파 조사 10분 후 H₂O₂ 농도는 132 kHz가 28 kHz보다 약 7.2배 높았지만(132 kHz: 0.36 ppm, 28 kHz: 0.05 ppm), 조사 90분 후에는 28 kHz가 132 kHz보다 1.1배 높았다(28 kHz: 0.45 ppm, 132 kHz: 0.4 ppm). 2.5 ppm 나프탈렌 용액에 132 kHz와 28 kHz 초음파 조사시 발생된 H₂O₂ 농도는 초순수에 초음파 조사한 결과보다 각각 0.1 ppm과 0.05 ppm씩 낮게 나타났다. 혼형(24 kHz)과 배스형(28 kHz) 초음파의 나프탈렌 분해효율은 각각 87%와 82.7%였고, k1은 22.8×10(-3) min(-1)와 18.7×10(-3) min(-1)로 산출되었다. 다주파 복합형 초음파 시스템(28 kHz 배스형+24 kHz 혼형 초음파)의 나프탈렌 분해효율은 단일주파수 24 kHz(혼형)와 비슷한 제거효율을 보였으나(88%), H₂O₂의 농도는 약 3.5배 높게 조사되었다(28 kHz+24 kHz: 2.37 ppm, 24 kHz: 0.7 ppm). 이와 같은 다주파 복합형 초음파 시스템은 OH 라디칼에 의해 산화가 잘 일어나는 물질의 분해에 매우 효과적으로 적용될 수 있을 것으로 예상된다. Naphthalene is a volatile, hydrophobic, and possibly carcinogenic compound that is known to have a severe detrimental effect to aquatic ecosystem. Our research examined the effects of various operating conditions (temperature, pH, initial concentration, and frequency and type of ultrasound) on the sonochemical degradation of naphthalene and OH radical production. The MDL (Method detection limit) determined by LC/FLD (1200 series, Agilient) using C-18 reversed column is measured up to 0.01 ppm. Naphthalene vapor produced from ultrasound irradiation was detected under 0.05 ppm. Comparison of naphthalene sonodegradion efficiency tested under open and closed reactor cover fell within less than 1% of difference. Increasing the reaction temperature from 15℃ to 40℃ resulted in reduction of naphthalene degradation efficiency (15℃: 95%→40℃: 85%), and altering pH from 12 to 3 increased the effect (pH 12: 84%→pH 3: 95.6%). Pseudo first-order constants (k1) of sonodegradation of naphthalene decreased as initial concentration of naphthalene increased (2.5 ppm: 27.3×10(-3) min(-3)→10 ppm : 19.0×10(-3) min(-3)). Degradation efficiency of 2.5 ppm of naphthalene subjected to 28 kHz of ultrasonic irradiation was found to be 1.46 times as much as when exposed under 132 kHz (132 kHz: 56%, 28 kHz: 82.7%). Additionally, its k1 constant was increased by 2.3 times (132 kHz: 2.4×10(-3) min(-1), 28 kHz: 5.0×10(-3) min(-1)). H₂O₂ concentration measured 10 minutes after the exposure to 132 kHz of ultrasound, when compared with the measurement under frequency of 28 kHz, was 7.2 times as much. The concentration measured after 90 minutes, however, showed the difference of only 10%. (concentration of H₂O₂ under 28 kHz being 1.1 times greater than that under 132 kHz.) The H₂O₂ concentration resulting from 2.5 ppm naphthalene after 90 minutes of sonication at 24 kHz and 132 kHz were lower by 0.05 and 0.1 ppm, respectively, than the concentration measured from the irradiated M.Q. water (no naphthalene added.) Degradation efficiency of horn type (24 kHz) and bath type (28 kHz) ultrasound was found to be 87% and 82.7%, respectively, and k1 was calculated into 22.8×10(-3) min(-1) and 18.7×10(-3) min(-1), respectively. Using the multi- frequency and mixed type of ultrasound system (28 kHz bath type+24 kHz horn type) simultaneously resulted in combined efficiency of 88.1%, while H₂O₂ concentration increased 3.5 times (28 kHz+24 kHz: 2.37 ppm, 24 kHz: 0.7 ppm.) Therefore, the multi-frequency and mixed type of ultrasound system procedure might be most effectively used for removing the substances that are easily oxidized by the OH radical.

      • 무용전공학생의 호흡순환기능 및 혈줄젖산농도에 관한 비교연구

        이종희(Lee Jong-Hee), 김말애(Kim Mal-Ae), 손흥기(Sohn Heung-Ki), 김민정(Kim Min-Jung) 경희대학교 스포츠과학연구원 1996 체육학논문집 Vol.24 No.-

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          The purpose of this study is to investigate the cardiovascular function and blood lactate of female by part of dance major in university.<BR>  For this purpose a total of 32 female students, attending university K in Seoul participated in the study. The subjects were selected randomly 24 female students majored in dance in university(Korean dance: 8, Modern dance: 8, Ballet: 8), and 8 regular female students, who did not have any dance experience.<BR>  The results of the study were as follows;<BR>  1. Cardiovascular function<BR>   1) In factors of rest HR showed in Control group 76.50±3.74 beats/min, Korean dance group 72.13±4.85 beats/min, Modern dance group 71.50±4.93 beats/min, Ballet dance group 68.88±4.19beats/min. Among these group there was significantly(p<.05).<BR>   2) In factors of HRmax showed in Korean dance group 200.63±4.78 beats/min, Ballet dance group 198.00±6.28beats/min, Modern dance group 197.63±6.65beats/min Control group 189.75±10.51beats/min. Among these group there was significantly(p<.05).<BR>   3) In factors of ?O2㎏ showed in Ballet dance group 44.46±4.09㎖/min, Korean dance group 43.95±2.95㎖/min, Modern dance group 40.73±3.36㎖/min, Control group 34.33±2.28㎖/min. Among these group there was significantly(p<.001).<BR>   4) In factors of ?CO2 showed in Korean dance group 84.31 ℓ/min, Modern dance group 2.60±0.44 ℓ/min, Ballet dance group 2.52±0.23 ℓ/min, Control group 2.23±0.34 ℓ/min. Among these group there was not significantly.<BR>   5) In factors of all-out time showed in Korean dance group 931±52.92sec, Modern dance group 916.75±40.96sec, Ballet dance group 908.88±28.44sec, Control group 809.38±70.02sec. Among these group there was significantly(p<.001).<BR>  2. Blood lactate<BR>   1) In factors of rest time blood lactate showed in Ballet dance group 1.17±0.26mM/ℓ, Control group 1.11±0.21mM/ℓ, Korean dance group 1.09±0.28mM/ℓ, Modern dance group 1.06±0.33mM/ℓ. Among these group there was not significantly.<BR>   2) in factors of all-out time blood lactate showed in Control group 9.14±0.92mM/ℓ, Ballet dance group 7.79±1.14mM/ℓ, Korean dance group 7.67±1.51mM/ℓ, Modern dance group 7.42±1.18mM/ℓ. Among these group there was not significantly.<BR>   3) In factors of recovery 3 minute blood lactate showed in Control group 9.52±0.94mM/ℓ, Ballet dance group 7.68±1.73mM/ℓ, Modern dance group 7.61±0.89mM/ℓ, Korean dance group 7.52±1.78mM/ℓ. Among these group there was significantly(p<.05).<BR>   4) In factors of recovery 5 minute blood lactate showed in Control group 9.91±1.22mM/ℓ. Korean dance group 7.97±2.38mM/ℓ, Ballet dance group 7.86±1.86mM/ℓ, Modern dance group 75.1±1.10mM/ℓ. Among these group there was significantly(p<.05).<BR>   5) In factors of recovery 10 minute Control group 8.99±0.97mM/ℓ, Ballet dance group 6.98±1.65mM/ℓ, Korean dance group 6.96±2.08mM/ℓ, Modern dance group 6.78±1.38mM/ℓ. Among these group there was significantly(p<.05).

      • SCOPUSKCI등재

        Ultrasonic Degradation of Endocrine Disrupting Compounds in Seawater and Brackish Water

        Park,,So-Young,Park,,Jong-Sung,Lee,,Ha-Yoon,Heo,,Ji-Yong,Yoon,,Yeo-Min,Choi,,Kyung-Ho,Her,,Nam-Guk Korean Society of Environmental Engineers 2011 Environmental Engineering Research Vol.16 No.3

        In this study, a series of experiments was conducted on the relative degradation of commonly known endocrine-disrupting compounds such as bisphenol A (BPA) and $17{\alpha}$-ethinyl estradiol (EE2) in a single-component aqueous solution using 28 and 580 kHz ultrasonic reactors. The experiments were conducted with three different types of model water: deionized water (DI), synthetic brackish water (SBW), and synthetic seawater (SSW) at pH 4, 7.5, and 11 in the presence of inert glass beads and humic acids. Significantly higher sonochemical degradation (93-97% for BPA) occurred at 580 kHz than at 28 kHz (43-61% for BPA), regardless of water type. A slightly higher degradation was observed for EE2 compared to that of BPA. The degradation rate of BPA and EE2 in DI water, SBW, and SSW after 30 min of ultrasound irradiation at 580 kHz increased slightly with the increase in pH from 4 (0.073-0.091 $min^{-1}$ for BPA and 0.081-0.094 $min^{-1}$ for EE2) to 7.5 (0.087-0.114 $min^{-1}$ for BPA and 0.092-0.124 $min^{-1}$ for EE2). In contrast, significant degradation was observed at pH 11 (0.149-0.221 $min^{-1}$ for BPA and 0.147-0.228 $min^{-1}$ for EE2). For the given frequencies of 28 and 580 kHz, the degradation rate increased in the presence of glass beads (0.1 mm and 25 g) for both BPA and EE2: 0.018-0.107 $min^{-1}$ without beads and 0.052-0.142 $min^{-1}$ with beads for BPA; 0.021-0.111 $min^{-1}$ without beads and 0.054-0.136 $min^{-1}$ with beads for EE2. A slight increase in degradation of both BPA and EE2 was found as the concentration of dissolved organic carbon (DOC, humic acids) increased in both SBW and SSW: 0.107-0.115 $min^{-1}$ in SBW and 0.087-0.101 $min^{-1}$ in SSW for BPA; 0.111-0.111 $min^{-1}$ in SWB and 0.092-0.105 $min^{-1}$ in SSW for EE2. After 30 min of sonicating the humic acid solution, DOC removal varied depending on the water type: 27% (3 mg $L^{-1}$) and 7% (10 mg $L^{-1}$) in SBW and 7% (3 mg $L^{-1}$) and 4% (10 mg $L^{-1}$) in SSW.

      • SCOPUSKCI등재

        Ultrasonic Degradation of Endocrine Disrupting Compounds in Seawater and Brackish Water

        So,Young,Park,Jong,Sung,Park,Ha,Yoon,Lee,Ji,Yong,Heo,Yeo,Min,Yoon,Kyung,Ho,Choi,Nam,Guk,Her 대한환경공학회 2011 Environmental Engineering Research Vol.16 No.3

        In this study, a series of experiments was conducted on the relative degradation of commonly known endocrine-disrupting compounds such as bisphenol A (BPA) and 17α-ethinyl estradiol (Ee₂) in a single-component aqueous solution using 28 and 580 kHz ultrasonic reactors. The experiments were conducted with three different types of model water: deionized water (DI), synthetic brackish water (SBW), and synthetic seawater (SSW) at pH 4, 7.5, and 11 in the presence of inert glass beads and humic acids. Significantly higher sonochemical degradation (93-97% for BPA) occurred at 580 kHz than at 28 kHz (43-61% for BPA), regardless of water type. A slightly higher degradation was observed for Ee₂ compared to that of BPA. The degradation rate of BPA and Ee₂ in DI water, SBW, and SSW after 30 min of ultrasound irradiation at 580 kHz increased slightly with the increase in pH from 4 (0.073-0.091 min-1 for BPA and 0.081-0.094 min-1 for Ee₂) to 7.5 (0.087-0.114 min-1 for BPA and 0.092?0.124 min-1 for Ee₂). In contrast, significant degradation was observed at pH 11 (0.149-0.221 min-1 for BPA and 0.147-0.228 min-1 for Ee₂). For the given frequencies of 28 and 580 kHz, the degradation rate increased in the presence of glass beads (0.1 mm and 25 g) for both BPA and Ee₂: 0.018-0.107 min-1 without beads and 0.052-0.142 min-1 with beads for BPA; 0.021-0.111 min-1 without beads and 0.054-0.136 min-1 with beads for Ee₂. A slight increase in degradation of both BPA and Ee₂ was found as the concentration of dissolved organic carbon (DOC, humic acids) increased in both SBW and SSW: 0.107-0.115 min-1 in SBW and 0.087-0.101 min-1 in SSW for BPA; 0.111-0.111 min-1 in SWB and 0.092-0.105 min-1 in SSW for Ee₂. After 30 min of sonicating the humic acid solution, DOC removal varied depending on the water type: 27% (3 mg L-1) and 7% (10 mg L-1) in SBW and 7% (3 mg L-1) and 4% (10 mg L-1) in SSW.

      • Single-port total laparoscopic hysterectomy: comparison of surgical outcomes according to the total operative time with techniques overcoming the difficulties

        ( Min Jong Song ), ( In Cheul Jeung ), ( Yong Seok Lee ), ( Eun Kyung Park ) 대한산부인과학회 2016 대한산부인과학회 학술대회 Vol.102 No.-

        목적: To compare surgical outcomes from 197patients who underwent single-port total laparoscopic hysterectomy(S-TLH) according to the total operative time and to describe techniques which overcomes the difficulties 방법: 219 patients underwent S-TLH for benign uterine disease and cervical disease between September 2011 and December 2015. 22patients (10%) were excluded from the analysis. 197patients were divided into 2groups according to the total operative time (median 150min); < 150min (n=93) and >=150min (n=104) 결과: Patient characteristics, except for BMD and age, were generally similar in the 2 groups. Adhesiolysis, hysterectomy time, stump repair time, specimen extraction time, blood loss,6hr VAS score, and weight of uterus showed statistically significant differernces in the 2groups. Clinical factors affected elongated operative time were adhesiolysis of posterior uterus (p=0.010), hysterectomy time ( >65min, p=0.000), specimen extraction time ( >34.4min, p=0.000), and weight of uterus( >270gram, p=0.015). Conversion to additional port laparoscopy occurred in 14patients(6.6%). Conversion to laparotomy occurred in 1patient(0.47%). The surgical complication rate was 3patients(3.2%) in < 150min group and 4patients(3.8%) in >=150min group. No urologic problem was in both group.1 postoperative ileus was in >=150min group and was relieved by conservative treatment. 결론: Hysterectomy time and specimen extraction time were influenced by weight of uterus and adhesiolysis of posterior uterus. Alternative methods for decreasing extraction time of large uterus and approaching posterior adhesion of uterus are needed in S-TLH.

      • SCOPUSKCI등재

        고유리지방산 혈증이 인슐린 비매개성 포도당 이용과 인슐린 저항성에 미치는 영향에 관한 연구

        안종호,이홍규,민헌기,민용기,고재준 대한당뇨병학회 1998 Diabetes and Metabolism Journal Vol.22 No.1

        연구배경: 생체에서 포도당 이용은 인슐린 매개성 포도당 이용(insulin-mediated glucose uptake, IMGU)과 인슐린 비매개성 포도당(non-insulin-mediated glucose uptake, NIMGU)의 두 가지 대사경로로 알려져 있다. 혈장 유리지방산이 인슐린 저항성과 포도당 대사에 미치는 영향에 대하여 많은 연구가 있었으나, 연구자에 따라 상이한 결과를 보여주고 있고, 고유리지방산혈증의 NIMGU에 대한 영향에 대해서는 연구가 없다. 연구방법: 6명의 정상남자에게 정상혈당(단계 1)과 고혈당(단계 2)의 2-단계 glucose clamp법을 시행하면서, 혈장 유리지방산이 인슐린 저항성과 NIMGU에 어떠한 영향을 주는 지에 대하여 관찰하였다. 실험은 각 연구대상에게 4주의 간격을 두고 무작위로 두 번 실시하였다. 이중 한 번은 중성지질과 헤파린을 주입하여 고유리지방산혈증을 유발시켰고(지질투여실험, test experiment), 다른 한 번은 이를 주입하지 않았다(대조실험, control experiment). 모든 실험에서 소마토스타틴(단계 1, 153nmol/h; 단계 2, 458 nmol/h)과 인슐린(1.1pmol/kg.min)을 함께 투여하였고, 동시에 [3-3^H]-glucose를 주사하여 내인성 포도당 생성률(endogenous glucose production)과 총포도당 제거율(rate of total glucose disappearance, Rd)을 계산하였다. NIMGU는 단계 1의 Rd와 단계 2의 Rd의 차이로 하였다. 연구결과: 혈장 포도당 농도는 대조실험과 지질투여실험의 단계 1에서 각각 5.4±0.1mmol/L, 5.4±0.1 mmol/L, 단계 2에서는 각각 14.7±0.2mmol/L, 14.6±0.1mmol/L으로 원하는 농도로 유지되었다. 형장 인슐린 농도는 대조실험과 지질투여실험의 단계 1에서 각각 56±4pmol/L, 52±4pmol/L이었으며, 단계 2에서는 각각 65±3pmol/L, 62±4pmol/L으로 대조실험과 지질투여실험의 단계 1, 단계 2간에 통계적으로 유의한 차이가 없이 실험 기간중 기저치를 유지하였다. 혈장 유리지방산 농도는 대조실험과 지질투여실험의 단계 1에서 각각 0.24±0.02mmol/L, 1.08±0.06mmol/L이었으며 단계 2에서는 각각 0.11±0.01mmol/L, 1.01±0.04mmol/L으로 지질투여실험의 단계 1과 단계 2에서 통계적으로 유의하게 혈장 유리지방산 농도가 높았다(p<0.01). 혈장 포도당 농도를 목표로 정한 수준까지 올리기 위한 포도당 주입률(glucose infusion rate)은 대조실험과 지질투여실험의 단계 1에서 각각 7.7±0.8μmol/kg.min, 3.8±0.9μmol/kg.min이었으며, 단계 2에서는 각각 29.7±3.7μmol/kg.min, 20.7±1.μmol/kg.min 으로 지질투여실험의 단계 1과 단계 2에서 통계적으로 유의하게 감소되어 있었다(p<0.05). Rd는 대조실험과 지질투여실험의 단계1에서 각각 12.9±0.4μmol/kg.min, 12.1±0.7μmol/kg.min이었으며, 단계 2에서는 각각 30.7±2.2μmol/kg.min, 26.3±1.7μmol/kg.min으로 지질 투여실험의 단계 2에서 통계적으로 유의하게 감소되어 있었다(p<0.05). NIMGU는 대조실험에서 17.8±2.2μmol/kg.min, 지질투여실험에서 14.2±1.6μmol/kg.min으로 대조실험과 지질투여실험군사이에 통계적으로 유의한 차이가 없었다. 결론: 이상의 실험에서 지질과 헤파린을 투여하여 인위적으로 혈장 유리지방산 농도를 높였을 때 인슈린 저항성을 관찰할 수 있었으나, 통게적으로 유의한 NIMGU의 장애는 관찰할 수 없었다.

      • KCI등재후보

        RPE 13에서의 12분 걷기테스트를 이용한 적정 운동강도의 타당성

        정은혜(Jung Eun-Hye), 최현민(Choi Hyun-Min), 김종경(Kim Jong-Kyung), 노호성(Nho Ho-Sung) 한국체육과학회 2008 한국체육과학회지 Vol.17 No.1

        The purpose of this study was to examine if a 12-min submaximal treadmill walk test corresponding to a rating of perceived exertion 13 (RPE13) was appropriate to determine exercise intensity. Twenty-seven subjects participated this study, aged from 22 to 26. VO2max, VO2AT and total distance were obtained from a graded exercise test (GXT). Also, VO2 and total distance were obtained during a 12-min submaximal treadmill walk test corresponding to RPE13. The results were obtained as follows: 1) The correlation coefficients between VO2 obtained during a 12-min submaximal treadmill walk test and VO2AT obtained during GXT were statistically significant (r=0.382). 2) The correlation coefficients between VO2 obtained during a 12-min submaximal treadmill walk test and VO2max obtained during GXT were statistically significant (r=0.434). 3) The correlation coefficients between total distance obtained during a 12-min submaximal treadmill walk test and V O2max, VO2AT obtained during GXT were statistically significant (r=0.721, 0.688). 4) The correlation coefficients between VO2 obtained during a 12-min submaximal treadmill walk test and VO2 obtained during RPE13 in GXT were statistically significant (r=0.526). These results suggest that a 12-min submaximal treadmill walk test corresponding to RPE13 is a valid for determining exercise intensity at AT level. Therefore, the 12-min submaximal treadmill walk test corresponding to RPE13 could be a useful for prescribing exercise intensity in the collegiate-student men.

      • 운동 직후 고온 침수가 EPOC와 TG/ fatty acid cycling에 미치는 영향

        조현철,김종규,강민철,홍완표,박노혁 龍仁大學校 體育科學硏究所 2005 體育科學硏究論叢 Vol.15 No.1

        The purpose this study was to estimate effects of EPOC and TG/fatty acid cycling on warm water immersion of immediately after exercise. To elucidate the role of fatty metabolism, a sequence of five experiments was performed. Seven physically active, male subjects volunteered to participate in the presented study. The mean values for age, body mass and hight were 25±1.52 yr, 79.2±9.52kg, 177.2±4.62cm, respectively. After giving consent, participant visited the laboratory on six occasion: 1) 30min of treadmill exercise VO2max 55% and a further 60min recovery, 2) 30min partial body warm water immersion in a 39℃ and a further 60min recovery, 3) 30min whole body warm water immersion in a 39℃ and a further 60min recovery, 4) 30min of treadmill exercise VO2mas 55% and in 30min partial body warm water immersion in a 39℃, 5) 30min of treadmill exercise VO2max 55% and in 30min whole body warm water immersion in a 39℃. When compared by recover period within repeat on the base of changes of subjects average body temperature, not effective interactions among repeat. However, partial and whole body warm water immersion immediately after exercise shows it as the best effective exercise for VO2max 55%, partial and whole body warm water immersion. When compared by recover period within repeat on the base of changes of subjects EPOC, effective interactions among repeat(p<.05). Partial and whole body warm water immersion immediately after exercise shows it as the best effective exercise for VO2mas 55%, partial and whole body warm water immersion. The catecholamines concentration was significantly higher partial and whole body warm water immersion than exercise of VO2max 55%(p<.05). The TG concentration and free fatty acid was significantly higher partial and whole body warm water immersion immediately after exercise than exercise of VO2max 55% than Partial and whole body warm water immersion(p<.05). Based on the facts that we have discussed above, human metabolism is increased by both exercise and conditions of immersion and partial and whole body warm water immersion immediately after exercise than exercise of VO2maw 55% shows it as better effective treatment for increasing TG/Fatty acid cycling activation. Due to extremely heavy stress complained by subjects during whole body immersion, it is thought that more researches on it should be required.

      • KCI등재

        과열증기처리 반탄화 추출물의 항산화 효과 검증에 관한 연구

        오근혜(Geun Hye Oh), 남정빈(Jeong Bin Nam), 양승민(Seung Min Yang), 정원희(Won Hee Joung), 정진산(Jin San Jeong), 신종민(Jong Min Shin), 강석구(Seog Goo Kang) 한국펄프·종이공학회 2018 펄프.종이技術 Vol.50 No.2

        The antioxidant properties of the extracts from torrefied wood subjected to superheated steam treatment were investigated. Total polyphenolics, total flavonoids, DPPH (2,2-diphenyl-1-picrylhydrazyl) free radical scavenging activity, reducing power, and FRAP (Ferric reducing antioxidant power) were determined to evaluate antioxidant activity. The total polyphenol content was 879.67±40.41 ㎎/mL at a concentration of 25 g/mL when the extract was subjected to a temperature of 300℃ for 10 min, and 759.67±25.17 ㎎/mL at a concentration of 25 g/mL at 350℃ for 10 min. The value of at 300℃ was 15.79% higher than that obtained at 350℃. Total flavonoid content was 111.18±3.55 ㎎/mL at a concentration of 25 g/mL at 300℃ for 10 min, and 80.58±2.58 ㎎/mL at a concentration of 25 g/mL at 350℃ for 10 min. The value at 300℃ was 37.97% higher than that obtained at 350℃. For the DPPH free radical scavenging activity, the highest scavenging activity was observed at a concentration of 6 g/mL. DPPH free radical scavenging activity at a concentration of 6 g/mL at 300℃ for 10 min was 89.83±0.03%, whereas at 350℃ for 10 min at the same concentration, it was found to be 87.99±0.1%. The value at 300℃ was 2.09% higher than that obtained at 350℃. Reducing power was determined to be 3.59±0.04 at a concentration of 25 g/mL at 300℃ for 10 min, and 2.92±0.1 at a concentration of 25 g/mL at 350℃ for 10 min. The value at 300℃ was 22.94% higher than that obtained at 350℃. FRAP was 1742±37 μM at a concentration of 25 g/mL at 300℃ for 10 min, and 1106±8 μM at a at 350℃ for 10 min. At 300℃, the FRAP value was 57.50% higher than that obtained at 350℃. Based on these results, we suggest that torrefied wood treated with superheated steam can be used in various applications because of its effective antioxidant properties.

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