http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
방사선 처리를 받은 흰쥐의 혈청내 스테로이드호르몬의 변화
신장식,이영근,김문규,윤용달,Shin, Jang-Sik,Lee, Young-Keun,Kim, Moon-Kyoo,Yoon, Yong-Dal 대한생식의학회 1994 Clinical and Experimental Reproductive Medicine Vol.21 No.3
The effect of radiation on the steroidogenesis of rat ovary was investigated. For this purpose, female rats aged 7-8 weeks were exposed to a single dose of ${\gamma}$ radiation(320 rad or 800 rad) by the cobalt-60. At fourth(day of the first estrus) and eighth(day of the second estrus) days after irradiation, the concentrations of serum steroid hormones were determined by radioimmunoassays (RIA). The correlation between survival rate(Y) and radiation dose(X) was Y=-0.06X+100(r=0.89, n=10). Lethal dose$(LD)_{50(30)}$ and $LD_{20(30)}$ were 833.33rad and 333.33rad respectively. The weights of body and ovary was decreased significantly by the $LD_{50(30)}$ irradiation during the 4 days, but both weights were recovered at day 8. The serum levels of 17a-hydroxyprogesterone(170HP) and estradiol($E_2$) in the irradiated rats were not generally different from those of control. However, the levels of testosterone(T) and 19-norterstosterone(19NT) in the irradiated rat at $LD_{50(30)}$ and $LD_{20(30)}$ radiation doses were decreased, while progesterone levels in serum of the irradiated rats were slightly increased. These results suggest that irradiation may inhibit the first step of steroidogenesis, especially the conversion of P to T, in the rat ovary.
신장식 ( Jang Sik Shin ),김민아 ( Min A Kim ),이상한 ( Sang Hang Lee ) 한국식품저장유통학회(구 한국농산물저장유통학회) 2013 한국식품저장유통학회지 Vol.20 No.2
법제화된 유황이 육계사육에 미치는 영향을 알아보고자 유황사료를 급여한 닭의 페사율, 무게 증가량을 측정 하였으며, 혈액의 항산화 활성과 혈액 내 글루타치온 및 콜레스테롤 함량, 그리고 계육의 단백질, 지방 분석과 닭유래 세포에서의 법제유황의 세포독성을 알아보았다. 먼저 일반사료에 비해 유황사료를 급여한 닭의 경우 페사율이 감소하며, 닭의 무게가 증가하는 것을 알 수 있었다. 혈액 내 항산화 활성을 FRAP 측정법을 이용하여 확인 한 결과 일반사료 급여군에 비해 유황사료 급여군에서 항산화 활성이 증가하였다. 혈액 내 전체 콜레스테롤 함량에는 큰 차이가 나지 않지만, 고밀도 콜레스테롤은 증가하는 반면, 저밀도 콜레스테롤은 감소하는 것을 확인하였다. 또한 계육에서의 총아미노산과 단백질 함량은 변화가 없지만 지방 함량은 크게 감소시키는 것을 알 수 있었으므로 유황사료가 계육의 품질을 향상시켜 상품성을 높여줄 수 있을 것으로 사료되었다. The purpose of this study was to evaluate the mortality rote, weight gain, and protein, lipid cholesterol, and total amino acid contents in processed-sulfur-diet chicken meat. Also investigated were the antioxidant activity and glutathione content of blood plasms. The mortality of the processed-sulfur-diet chickens was relatively reduced, and their weight increased compared to the normal-diet chickens. Although the glutathione content decreased in the processed-sulfur-diet chicken blood plasrna, the antioxidant activity increased compared with the normal-diet chickens. Also, there was no difference in the total cholesterol contents of the blood, hut the level of HDL cholesterol increased while that of LDL cholesterol decreased. Furthermore, there were no changes in the total amino acid and protein contents, but the fat content was significantly reduced. As no toxicity was found in the DT 40 cells in the MTT assay, it can be concluded that dietary sulfur in chicken feed can improve the quality of poultry products.
가정용 연료전지 1Nm³/hr급 천연가스 연료처리장치의 운전 특성
신장식(Shin, Jang-Sik),신석재(Shin, Seock-Jae),이승영(Lee, Seung-Young),양혜경(Yang, Hye-Kyong),성봉현(Sung, Bong-Hyun),김두훈(Kim, Doo-Hoon),박종원(Park, Jong-Won) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.11
In this study, we investigated operating characteristics of natural gas fuel processor for polymer electrolyte membrane fuel cells (PEMFCs). The fuel processor consists of a natural gas reformer, a water-gas shift reactor, a heat-exchanger and a burner, in which the overall integrated volume is exactly(exceptionally) small, namely, about 10L except outer insulation. The producted hydrogen is 1Nm³/hr and the maximum thermal efficiency is {sim}76%(low heating value) at full operating load. A compact and highly efficient 1Nm³/hr class natural gas fuel processor was developed at UNISON is an advantage for application in residential PEMFCs co-generation systems.
신장식(Shin, Jang-Sik),박종원(Park, Jong-Won),양혜경(Yang, Hye-Kyong),이승영(Lee, Seung-Young),성봉현(Song, Bong-Hyun),신석재(Shin, Seock-Jae) 한국신재생에너지학회 2006 한국신재생에너지학회 학술대회논문집 Vol.2006 No.11
In this study, we investigated operating characteristics of the LNG burner for steam methane reforming. The developed LNG burner and catalytic reactor to supply an efficient heat transfer between the combustion gas and catalyst got a good response of various operating load within 5-7 minute and high efficiency for steam methane reforming as a conversion of methane over 90%. We calculated the volume of catalyst for 1Nm³/hr steam LNG reforming as 211cc/(Nm³/hr;H₂) and got the operating condition and design data of the burner and steam reforming for LNG.
공업화학 , 촉매 / 반응공학 : 석탄가스전환용 액상 메탄올 제조 공정 비교 연구
신장식(Jang Sik Shin),정헌(Heon Jung),이종대(Jong Dae Lee) 한국화학공학회 2001 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.39 No.2
Two liquid-phase methanol synthesis processes, the Methyl Formate Intermediate process(MF process) and the LPMEOH process, were experimentally investigated to find the suitability of the process for the coal-derived syngas. The MF process showed the superior methanol synthesis rate at the same gas hourly space velocity(GHSV) than LPMEOH process. The MF process showed more than 50% conversion of syngas per pass and 3.7%/day of deactivation rate which are far better than 30% conversion per pass and 24%/day deactivation rate of the LPMEOH process. The reaction condition of the MF process is milder than that of the LPMEOH process. The weakness of the MF process, which is the severe poisoning by small amounts of CO₂, was able to be overcome from the experimental result that the reaction proceeded even with the syngas with 0.5% CO₂. Overall comparison reveals that MF process is more suitable than the LPMEOH process when the coal-derived syngas is to be used for methanol synthesis.
신장식 ( Jang Sik Shin ),정헌 ( Heon Jung ),이종대 ( Jong Dae Lee ) 한국유화학회 2002 한국응용과학기술학회지 Vol.19 No.4
N/A Liquid-phase methanol synthesis via methyl formate using coal-derived syngas was carried out in a bench-scale(diameter 173㎜ and dispersion height 1200㎜) slurry bubble column reactor(SBCR) Under the condition of 180℃, 61 atm, 30 L/min, H_2/CO=2 and a slurry mixture of 2 kg of copper, chromite and 0.5 ㎏ of KOCH_3 suspended in 14 L of methanol, the per pass conversions of syngas is 6 %, maximum concentration of methyl formate 3.088 mol% and maximum synthesis rate of methanol 0.8 gmole/㎏·hr. It is a significant evidence that copper chromite powder as heterogeneous catalyst didn`t active for the hydrogenolysis of methyl formate to methanol, resulting copper chromite powder was not efficiently suspended in a slurry mixture. To enhance the hydrogenolysis of methyl formate in liquid-phase methanol synthesis process, the designed SBCR have need to use the higher specific ravity solvent and/or decrease the catalyst particle size.
공업화학 , 촉매 / 반응공학 : 석탄가스 전환용 Methyl Formate 중간체 메탄올 합성반응의 공정 연구
신장식(Jang Sik Shin),정헌(Heon Jung),이종대(Jong Dae Lee) 한국화학공학회 2001 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.39 No.3
New catalysts development and process variable study have been carried out to seek the possibility of developing methyl formate intermediate methanol synthesis process into commercial scale. Cu/MgO was prepared in an effort to replace the copper chromate catalyst. Cu/MgO was inferior to copper chromate in terms of the weight-based activity and the stability. An attempt to substitute the homogeneous(methanol-soluble) KOCH3 catalyst with an anion-exchanged polyaniline resin was partially successful since anion-exchanged resin showed some activity but it seems to dissolve in the methanol solvent. The best combination of the catalysts is Ba-promoted copper chromate with KOCH₃. The optimum reaction condition is at 180, 61 atm with syngas flowing at 1,000 L/㎏·hr to the reaction mixture of 40 g of copper chromate and 5 g of KOCH₃dispersed in 250 ㏄ of methanol. At this condition, the problem of severe deactivation of the catalytic system by a few ppm of CO₂ has been overcome and the system was stable up to 1 % of CO₂ in the feed gas. The catalytic system was stable when feed gas was syngas generated from coal gasification (HZ/CO=1) with 70% of H₂ conversion at the rate of 6 gmole/㎏·hr. When triglyme was used as a solvent instead of methanol, slight reduction in the rate of reaction was observed. However, the use of triglyme can make the recovery of the product methanol much easier than the methanol solvent system.
적토룡 추출 단백분획의 프로테나제 유도 수용체-2의 활성화 및 형행개선 효과
이철규,신장식,최영근,임채곤,조일환,김철,Lee, Chul-Kyu,Shin, Jang-Sik,Choi, Young-Keun,Lim, Chae-Kon,Cho, Il-Hwan,Kim, Chul 대한약학회 1997 약학회지 Vol.41 No.2
The proteinase-activated receptor (PAR-2) belongs to the family of seven transmembrane region receptors, like the thrombin receptor, it is activated by specific proteolytic clea vage of its extracellular amino terminus and a synthetic peptide (SLIGRL). The earthworm protein fraction (EPF) extracted from Lumbricus rubellus elicted dose- and endothelium-dependent relaxations in phenylephrine-contracted rat thoracic aorta, whereas heat inactivated EPF (0.5 ${\mu}g$ /ml) had no effect. In the presence of the nitric oxide synthase inhibitor NG-methyl-L-arginine (1.8 micro M), EPF (0.5 ${\mu}g$ /ml)-induced relaxations were partially inhibited. Furthermore, EPF (0.5 ${\mu}g$ /ml) dramatically caused relaxation of thrombin-desenstized rat thoracic aorta. These results indicate that EPF activates PAR-2 in vascular endothelial cell. Intravenous injection of EPF (20 mg/kg, bolus) into anesthetized rats produced a marked depressor response. EPF (0 ~ 80 ${\mu}g$ /ml, gradient) was very effective on increasing of perfusion volume in rabbit ear vessel preparations. These results imply the usefulness of EPF as a vascular smooth muscle relaxant and indicate that the activation of PAR-2 may be a mechanism of EPF on hemokinetic improvement.
이용,박세진,김민수,신장식,신석재,YI, YONG,PARK, SE JIN,KIM, MIN SOO,SHIN, JANG SIK,SHIN, SEOCK JAE 한국수소및신에너지학회 2018 한국수소 및 신에너지학회논문집 Vol.29 No.4
Solid oxide fuel cell (SOFC) operates at high temperature, therefor has the advantage of higher power generation and using exhaust heat than other fuel cells. In particular, the reforming reaction can be performed inside the SOFC stack to reduce the cooling of the stack and the burden on the reformer reactor. In this study, the reformer structure, operating characteristics, and thermal efficiency were evaluated for the optimization design of a heat exchanger type reformer of a 1 kW SOFC system.