http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Mice 소장의 Cajal 세포에서 기록되는 향도잡이 전류의 특성
장성종 ( Jang Seong Jong ),조은택 ( Jo Eun Taeg ),허광식 ( Heo Gwang Sig ),박찬국 ( Park Chan Gug ),김만우 ( Kim Man U ),장인엽 ( Jang In Yeob ),신무경 ( Sin Mu Gyeong ),차경훈 ( Cha Gyeong Hun ),염철호 ( Yeom Cheol Ho ),전제열 ( 대한소화기학회 2003 대한소화기학회지 Vol.42 No.2
Background/Aims: Gastrointestinal motility is initiated by the periodic generation of slow waves. Interstitial cells of Cajal (ICC) are pacemaker cells that generate slow waves and drive spontaneous mechanical contractions of the gastrointestinal smooth muscle. Slow waves generate the periodic activation of spontaneous inward currents (pacemaker currents). The aim of this study was to investigate the characterization of pacemaker currents of ICC. Methods: The ICC in mice small intestine were cultured with stem cell factor for 2 days, and then we recorded pacemaker currents and slow waves using a whole-cell patch clamp technique. Results: Under voltage clamp at -80 mV of holding potential, ICC generated pacemaker currents. Tetrodotoxin and nifedipine did not affect on the pacemaker currents. In addition, tetraethylammonium, 4-aminopyridine and glibenclamide did not affect on the pacemaker currents. The reduction of external Na+ concentrations inhibited pacemaker currents. Moreover, these currents were completely abolished in the external Ca2+-free condition. Gadolinium and flufenamic acid, inhibitors of non-selective cationic currents, inhibited pacemaker currents. Thapsigargin and cyclopiazoic acid, inhibitors of Ca2+-ATPase in endoplasmic reticulum, abolished pacemaker currents. Carbachol depolarized membrane potential and increased inward currents. Conclusions: These results suggest that pacemaker currents are mediated by the activation of non-selective cation channel and become a target of neurotransmitters in regulation of intestinal motility. (Korean J Gastroenterol 2003;42:121-127)
행정동별 접근도가 교통수단별 분담률에 미치는 영향 분석
장성만(Jang Seong-Man),안영수(An Young-Soo),이승일(Lee Seung-Il) 대한국토·도시계획학회 2011 國土計劃 Vol.46 No.4
To deal with urban environmental issues, efforts to shift car-oriented transportation system to transit-oriented one have been being made in modern cities. The City of Seoul also has aimed to reduce car user by providing lots of transit facilities. However, the modal share rate of transit has not been increased. Based on that, the purpose of this paper is to explore the accessibility values to transportation facilities and compare them with the rates of each mode traffic. This study set up a method to calculate the accessibility values of three modes: subway, bus and car. They were converted to Dong’s accessibility values to analyze their impacts on Dong’s modal share rates. For considering urban characteristics of each Dong, the density of population and building, the rate of job and residence, and the land price were included in the independent variables of the multiple linear regression model for the modal share rate analysis. This study found an apparent correlation between the accessibility values to the transportation facilities and the modal share rates, especially by subway. Additionally, the price of land fairly influenced the modal share rate of subway and car in a contrary way. The analysis method and results from this study would affect the urban transportation policy positively and be used to invigorate transit use.
새싹 인삼의 수확 전 UV-A 및 -B LED의 조사에 의한 진세노사이드의 영향
장성남(Seong-Nam Jang),이가운(Ga-Oun Lee),심한솔(Han-Sol Sim),배진수(Jin-Su Bae),이애련(Ae-Ryeon Lee),조두용(Du-Yong Cho),조계만(Kye-Man Cho),손기호(Ki-Ho Son) (사)한국생물환경조절학회 2022 생물환경조절학회지 Vol.31 No.1
본 연구는 새싹 인삼의 수확 전에 UV-A, UV-B LED의 추가 조사에 따른 ginsenoside 함량 변화를 알아보기 위해 수행되었다. 실험 재료는 1년근 묘삼을 사용하였고, 인삼 전용 상토를 채운 삽목상자에 100개체를 정식하였다. 그 후, 묘삼을 온도 20°C, 습도 70%, 평균 광도 80μmol·m<SUP>-2</SUP>·s<SUP>-1</SUP>(광주기; 24h)로 유지되는 컨테이너형 식물 공장에서 37일 동안 재배하였다. 37일 동안 재배한 새싹 인삼을 UV-A(370nm; 12.90W·m<SUP>-2</SUP>) 및 UV-B(300nm; 0.31W·m<SUP>-2</SUP>) LED가 장착된 맞춤형 챔버로 옮겨 3일 동안 처리하였다. 생육조사 및 ginsenoside 함량 분석은 UV 처리 0일(대조구), 1일, 2일 및 3일에 각각 수확하여 수행하였다. 그 결과, 생육은 대조구와 UV 파장 및 일수에 따른 통계적 차이를 보이지 않았다. 반면에 UV-A 처리 3일 만에 지상부의 ginsenoside 함량이 대조구에 비해 186% 향상되었다. 뿌리의 ginsenoside 함량은 UV-A 1일 처리 및 UV-B 3일 처리에서 대조구에 비해 각각 171% 및 160% 더 증가하였다. 본 실험의 결과, 식물공장에서 수확 전 UV LED 조사를 통해 ginsenoside 함량이 높은 새싹 인삼을 생산할 수 있는 것으로 사료된다. This study was conducted to determine the changes in ginsenosides content according to additional UV-A, and UV-B LED irradiation before harvesting the ginseng sprouts. One-year-old ginseng seedlings (n=100) were transplanted in a tray containing a ginseng medium. The ginseng sprouts were grown for 37 days at a temperature of 20°C (24h), a humidity of 70%, and an average light intensity of 80 μmol·m<SUP>-2</SUP>·s<SUP>-1</SUP> (photoperiod; 24h) in a container-type plant factory. Ginseng sprouts were then transferred to a custom chamber equipped with UV-A (370 nm; 12.90 W·m<SUP>-2</SUP>) and UV-B (300 nm; 0.31 W·m<SUP>-2</SUP>) LEDs and treated for 3 days. Growth parameters and ginsenoside contents in shoot and root were conducted by harvesting on days 0 (control), 1, 2, and 3 of UV treatments, respectively. The growth parameters showed non-significant differences between the control and the UV treatments (wavelengths or the number of days). Ginsenoside contents of the shoot was highly improved by 186% in UV-A treatment compared to the control in 3 days of the treatment time. The ginsenoside contents of the roots was more improved in UV-A 1-day treatment and UV-B 3-day treatment, compared to the control by 171% and 160%, respectively. As a result of this experiment, it is thought that UV LED irradiation before harvesting can produce sprout ginseng with high ginsenoside contents in a plant factory.