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스쿠버 다이빙 경력에 따른 무감압한계 잠수환경에서의 반복잠수가 Epinephrine, Norepinephrine 및 Dopamine 변화에 미치는 영향
소이용(So, Lee-Yong),한길수(Han, Gil-Soo),오문엽(Oh, Moon-Yeop),강명학(Kang, Myong-Hak) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.1
The purpose of this study to verify the effects of repetitive dive in the No Decompression Limit(NDL) diving environment on the changes in Epinephrine, Norepinephrine and Dopamine depending on scuba diving experience. This study targeted 9 healthy adults of an unskilled group with less than 40 diving frequencies and 10 ones of a skilled group with over 40 diving frequencies. The study findings are as follows. After repetitive dive, Epinephrine decreased to 29.14% in skilled divers (p<.001) and increased to 48.34% in unskilled divers, so there was a statistically significant difference (p<.05). Norepinephrine decreased to 40.22% in skilled divers, so there was a statistically significant difference (p<.001). Norepinephrine decreased to 4.21% in unskilled divers, but there was no statistically significant difference. Dopamine decreased to 75.02% and 59.96% in skilled divers and unskilled divers respectively, so both groups showed statistically significant differences (p<.001). Norepinephrine and Dopamine declined in both skilled and unskilled groups after repetitive dive in the NDL diving environment, but Epinephrine decreased in the skilled group, while it increased in the unskilled group. This is because long stay or exercise in the cold environment led to an increase in heat production for maintaining a body temperature, the metabolic rate rose, shivering was caused by the decrease in body temperature and excessive stress lasted long during a dive.
Kim, So Han,Han, Sang Yeop,Kim, Jeong Hee,Kang, Yi Young,Lee, Junseong,Kim, Youngjo WILEY‐VCH Verlag 2015 European journal of inorganic chemistry Vol.2015 No.13
<P><B>Abstract</B></P><P>A monomeric aluminum complex containing aliphatic tetradentate ligand <B>L1 </B>(HOCMe<SUB>2</SUB>CH<SUB>2</SUB>NMeCH<SUB>2</SUB>CH<SUB>2</SUB>NMeCH<SUB>2</SUB>CMe<SUB>2</SUB>OH) was synthesized and used as a catalyst for cycloaddition between CO<SUB>2</SUB> and epoxides in the presence of PPNCl as a cocatalyst. To check the effect of ligand <B>L1</B>, coordinated to the aluminum center, on the activity of cycloaddition, the new ligand HOCMe<SUB>2</SUB>CH<SUB>2</SUB>NMe<SUB>2</SUB>, which corresponds to half of <B>L1</B>, was systematically designed to make monomeric or dimeric aluminum complexes. Comparison of the catalytic properties of the aluminum complex containing the tetradentate ligand with those of the two related aluminum complexes containing the bidentate ligand under the same conditions revealed that the first system showed higher activity than the other two for cycloaddition between CO<SUB>2</SUB> and epoxides in the presence of PPNCl, which was the best cocatalyst out of the six compounds <I>n</I>Bu<SUB>4</SUB>PBr, <I>n</I>Bu<SUB>4</SUB>NCl, <I>n</I>Bu<SUB>4</SUB>NBr, <I>n</I>Bu<SUB>4</SUB>NI, DMAP, and PPNCl.</P>
Jeong, Hwan Yeop,Yang, Dae-Soo,Han, Jae Hee,Lee, Jang Yong,So, Soonyong,Suh, Dong Hack,Hong, Sung Kwon,Hong, Young Taik,Kim, Tae-Ho Elsevier 2018 Journal of Power Sources Vol.398 No.-
<P><B>Abstract</B></P> <P>We develop a novel approach to improve the robustness of the interface between the hydrocarbon (HC) membrane and the perfluorosulfonic acid (PFSA) ionomer-based catalyst layer (CL) in membrane electrode assemblies (MEAs). This approach involves the creation of a gradient-composition interfacial bonding layer, in which the HC and PFSA contents are gradually varied along the thickness direction. The layer is fabricated using a simple spray-coating method, in which HC and PFSA ionomer mixtures with different compositions are sprayed stepwise onto both sides of the HC membrane surface. The interfacial structure developed in this process minimizes the chemical incompatibility between the HC and PFSA polymers. Owing to the tightly bound sublayers resulting from the intertwined HC and PFSA microdomains, the gradient-composition bonding layer provides a significantly improved interfacial adhesion strength (14 times higher than that of the pristine membrane without bonding layer) between the HC membrane and the PFSA-based CL. Finally, the fabricated MEA exhibits a >433% higher durability in humidity cycling tests compared with the pristine MEA without interfacial bonding layer, together with a better retention of its initial performance.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Novel interfacial bonding layer for hydrocarbon-based MEA in PEMFC is developed. </LI> <LI> Bonding layer with a compositional gradient can be fabricated by a spraying method. </LI> <LI> 14 times improved interfacial adhesion strength is obtained. </LI> <LI> Excellent MEA durability is achieved via the stable membrane-electrode interface. </LI> </UL> </P>
천왕보심단이 정상인의 심박변이도에 미치는 영향에 대한 예비연구
강래엽 ( Rae Yeop Kang ),김현진 ( Hyun Jin Kim ),한효정 ( Hyo Jung Han ),박은영 ( Eun Young Park ),장정아 ( Jeong A Jang ),서호석 ( Ho Seok Seo ),김진원 ( Jin Won Kim ),강현선 ( Hyun Sun Kang ),김지훈 ( Jee Hoon Kim ),조소현 ( So 대한한방신경정신과학회 2009 동의신경정신과학회지 Vol.20 No.4
Objectives: This study was conducted to assess the effect of Chunwangbosim-dan(CB) on the autonomic nervous system by using heart rate variability measurement. Methods: The eligible subjects were composed of the healthy female group of ages 25 to 30 years. They were divided into two groups, the CB group(n=16) and the control group(n=16). We measured the heart rate variability respectively for 3 times at 14:00, 16:00, and 17:00. In the CB group, subjects were administered CB at 15:00. For the measurement values, Mean Heart Rate and SDNN(standard deviation of the NN intervals) were used as time domain analysis, and HF(high frequency), LF(low frequency), and LF/HF ratio were used as frequency domain analysis. Results: The degree of LF changes in the CB group was significantly lower than control group at 1 hour after administration. Conclusions: We suggest that Chunwangbosim-dan may be useful for stabilization of the autonomic nervous system by controlling sympathetic nerve in healthy people.
보행과 한발,두발 수직점프 수행 시 내측비복근 근-건 복합체와 근섬유다발의 길이 변화 패턴의 차이
이해동 ( Hae Dong Lee ),한보람 ( Bo Ram Han ),김진선 ( Jin Sun Kim ),오정훈 ( Jeong Hoon Oh ),조한엽 ( Han Yeop Cho ),윤소야 ( So Ya Yoon ) 한국운동역학회 2015 한국운동역학회지 Vol.25 No.2
Objective: The purpose of this study was to investigate difference in fascicle behavior of the medial gastrocnemius during the locomotion with varying intensities, such as gait and one-legged and two-legged vertical jumping. Methods: Six subjects (3 males and 3 females; age: 27.2±1.6 yrs., body mass: 62.8±9.8 kg, height: 169.6±8.5 cm) performed normal gait (G) at preferred speed and maximum vertical jumping with one (OJ) and two (TJ) legs. While subjects were performing the given tasks, the hip, knee and ankle joint motion and ground reaction force was monitored using a 8-infrared camera motion analysis system with two forceplates. Simultaneously, electromyography of the triceps surae muscles, and the fascicle length of the medial gastrocnemius were recorded using a real-time ultrasound imaging machine. Results: Comparing to gait, the kinematic and kinetic parameters of TJ and OJ were found to be significantly different. Along with those parameters, change in the medial gastrocnemius (MG) muscle-tendon complex (MTC) length (50.57±6.20 mm for TJ and 44.14±5.39 mm for OJ) and changes in the fascicle length of the MG (18.97±3.58 mm for TJ and 20.31±4.59 mm for OJ) were observed. Although the total excursion of the MTC and the MG fascicle length during the two types of jump were not significantly different, however the pattern of length changes were found to be different. For TJ, the fascicle length maintained isometric longer during the propulsive phase than OJ. Conclusion: One-legged and two-legged vertical jumping use different muscle-tendon interaction strategies.
백남수(Nam-Soo Paek),이윤엽(Youn Yeop Lee),한설화(Seul Haw Han),강창호(Chang-Ho Kang),소재성(Jae-Seong So) 한국생물공학회 2016 KSBB Journal Vol.31 No.1
Vaginitis, also known as vaginal infection and vulvovaginitis, is an inflammation of the vagina and possibly vulva. The three main kinds of vaginitis are bacterial vaginosis, vaginal candidiasis, and trichomoniasis. The purpose of this study was to characterize Lactobacillus plantarum MG989 and L. fermentum MG901 isolated from the vaginas of healthy Korean women in terms of their inhibitory activity against the vaginitis associated pathogens such as Gardnerella vaginalis and Candida albicans. Co-culture experiments showed that the two Lactobacillus strains MG989 and MG901 significantly reduced the viability of G. vaginalis and C. albicans. Also, the two strains were resistant to bile acid up to 1% and their autoaggregation rates were as high as 83.33%. Further studies are underway to demonstrate that the two strains can be applied as pharmaceutical agents for recovering healthy vaginal ecosystem.
Yang, Hyun Ok,Kim, Sang Hee,Cho, So-Hye,Kim, Mi-Geum,Seo, Ji-Young,Park, Jung-Sun,Jhon, Gil-Ja,Han, So-Yeop The Pharmaceutical Society of Japan 2004 Chemical & pharmaceutical bulletin Vol.52 No.7
<P>A mixture of monoacetyldiglycerides was newly isolated from the chloroform extract of antlers of <I>Cervus nippon</I>, guided by the hematopoietic stimulation of stem cells. The structures of monoacetyldiglycerides were determined by various spectroscopic methods: FAB MS, CID tandem MS, and 1D and 2D NMR. A mixture of at least nine inseparable <I>sn</I>-3-monoacetyldiglycerides was identified: 1 [C<SUB>39</SUB>H<SUB>72</SUB>O<SUB>6</SUB> (C16 : 0/C18 : 1)], 2 [C<SUB>39</SUB>H<SUB>72</SUB>O<SUB>6</SUB> (C18 : 1/C16 : 0)], 3 [C<SUB>39</SUB>H<SUB>70</SUB>O<SUB>6</SUB> (C16 : 0/C18 : 2)], 4 [C<SUB>39</SUB>H<SUB>70</SUB>O<SUB>6</SUB> (C18 : 2/C16 : 0)], 5 [C<SUB>41</SUB>H<SUB>74</SUB>O<SUB>6</SUB> (C18 : 0/C18 : 2), 6 [C<SUB>41</SUB>H<SUB>74</SUB>O<SUB>6</SUB> (C18 : 2/C18 : 0)], 7 [C<SUB>41</SUB>H<SUB>74</SUB>O<SUB>6</SUB> (C18 : 1/C18 : 1)], 8 [C<SUB>43</SUB>H<SUB>74</SUB>O<SUB>6</SUB> (C18 : 0/C20 : 4)], and 9 [C<SUB>43</SUB>H<SUB>74</SUB>O<SUB>6</SUB> (C20 : 4/C18 : 0)]. Among these nine monoacetyldiglycerides in deer antlers, compound 3 was one of the major compounds and was efficiently synthesized from glycerol. Spectral data of synthetic monoacetyldiglyceride 3 were compared with the corresponding data for the mixture of natural monoacetyldiglycerides. The mixture of natural monoacetyldiglycerides from deer antlers showed potent activity on the hematopoiesis (stimulation index=1.40±0.05, <I>p</I><0.02 at 1 μg/ml), and synthetic monoacetyldiglyceride 3 showed even better activity (stimulation index=1.54±0.12, <I>p</I><0.001, at 1 μg/ml).</P>