http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
고석태(Suk Tai Ko),신흥수(Heung Soo Shin) 대한약학회 1977 약학회지 Vol.21 No.1
Intravenous injection of Mori Radicis Cortex Water Extract (MWE) regularly caused the dose-related, lowering of blood pressure in the rabbits anesthetized with urethane, and then did not show the cumulative effect and the tachyphylaxis. The hypotensive effects of MWE were inhibited by atropine, chlorisodamine, phentolamine and bethanidine, while not altered by diphenhydramine, propranolol and cyproheptadine. Atropine after chlorisondamine did not alter the effect of MWE. MWE potentiated the pressor effect of norepinephrine, but did not influence the pressor effect of angiotensin. The pressure risen by carotid occlusion was inhibited by previous administration of MWE. It is concluded that MWE elicits hypotensive action in the rabbit by the centrally induced cholinergic effect and the inhibition of responses to sypathetic adrenergic nerve activation.
전기 방사법을 통해 제조된 Poly(L-Lactide-co-ε -caprolactone)Marine Collagen 나노파이버의 특성 및 세포친화력 평가
김우진(Woo Jin Kim),신영민(Young Min Shin),박종석(Jong Seok Park),권희정(Hui Jeong Gwon),김용수(Yong Soo Kim),신흥수(Heung So Shin),노영창(Young Chang Nho),임윤목(Youn Mook Lim),정무상(Moo Sang Chong) 한국고분자학회 2012 폴리머 Vol.36 No.2
본 연구의 목적은 전기방사법을 사용하여 poly(L-lactide-co-ε-caprolactone) (PLCL)과 marine collagen (MC) 이 혼합된 나노섬유를 제조하는 것이다. 전기방사된 나노섬유의 직경과 형태는 여러 공정 변수에 의해서 변화되 는데, PLCL과 MC의 혼합비, 노즐과 콜렉터와의 거리, 노즐의 직경, 용액의 방출 속도 그리고 전기장의 세기 변 화에 따라 나노파이버의 직경을 주사전자현미경을 통해서 분석하였다. 또한 제조된 나노파이버의 표면변화를 확인하기 위해 물과의 접촉각을 측정하였으며, 나노파이버의 세포 친화성을 평가하기 위해 MG-63을 이용하여 생존율과 흡착형태를 주사전자현미경과 형광현미경을 통해서 관찰하였다. 이와 같은 연구 결과, 방사거리, MC 의 함량, 전기장의 세기가 증가할수록 제조된 나노파이버의 평균직경은 감소하는 경향을 나타냈다. 또한 MC의 함량이 증가할수록 나노파이버의 친수성이 증가하였고 세포독성은 관찰되지 않았다. 이에 따라 해양유래 생물 에서 추출한 콜라겐은 조직공학용 소재에 새롭게 사용될 수 있을 것으로 예상된다. The uniform nanofibers of poly(L-lactide-co-ε-caprolactone) (PLCL) with different contents of marine collagen (MC) were successfully prepared by electrospinning method. The effects of the major parameters in electrospinning process such as tip to target distance (TTD), voltage, nozzle size and flow rate on the average diameter of the electrospun nanofiber were investigated in generating composite nanofiber. The diameter and morphology of the nanofibers were confirmed by a scanning electron microscopy (SEM). Also, we measured a water contact angle to determine the surface wettability of the nanofibers. The average diameter of the nanofibers decreased as the value of TTD, MC contents, and voltages increased in comparison with that of pristine PLCL nanofiber. In contrast, the diameter of the nanofibers increased as the flow rate and inner diameter of nozzle increased in comparison with that of pristine PLCL. In addition, the hydrophilicity of the nanofiber and attachment of MG-63 cells on the sheets increased as incorporated collagen contents increased. Therefore, the marine collagen would be a potential material to enhance cellular interactivity of synthetic materials by mimicking the natural tissue.
申興秀,李炳哲 홍익대학교 산업기술연구소 1993 産業技術 Vol.2 No.-
Mathematical simulation was performed to study the separation of CH_4/CO_2 gas mixture by pressure swing adsorption (PSA) process. The PSA processes considered in this study was 3-step PSA process for CH_4 or CO_2 production only and 4-step PSA process for simultaneous production of CH_4 and CO_2 using 5A zeolite and PCB activated carbon. Performance of separation by 3-PSA for CH_4 or CO_2 production only and 4-step PSA for simultaneous production of CH_4 and CO_2 operated below atmospheric pressure using 5A zeolite is better than that using activated carbon. PSA process operated below atmospheric pressure using both adsorbents is more advantageous than that above atmospheric pressure. 4-step PSA for simultaneous production of CH_4 and CO_2 operated below atmospheric pressure using 5A zeolite resulted in a little less inferior performance of separation than that for CH_4 production only, but in a far better performance than that for CO_2 production only. However, such an improvement in performance of CO_2 separation by 4-step PSA cycle disappeared when using activated carbon instead of 5A zeolite. The typical results for a PSA cycle between 1.01bar and 0.267bar using 5A zeolite were : 97.8 ㏖% CH_4 purity at 58.4% CH_4 recovery for CH_4 production only, 98.1 ㏖% CO_2 purity at 32.0% CO_2 recovery for CO_2 production only, and 97.3 ㏖% CH_4 purity at 50.9% CH_4 recovery for CH_4 and 95.8 ㏖% CO_2 purity at 71.6% CO_2 recovery for simultaneous production of CH_4 and CO_2.
압력스윙흡착공정에 의한 다성분계 가스분리 : 다탑공정의 수학적 모델 개발 Development of a Mathematical Model for Multi-bed Processes
申興秀 홍익대학교 산업기술연구소 1999 産業技術 Vol.9 No.-
Mathematical model is developed for separation of a multicomponent gas mixture by multi-bed pressure swing adsorption (PSA) process. Equilibrium cell model is used with the assumption of uncoupled Langmuir isotherms for components and isothermal operation. Multi-bed cycles considered in this study are 4 and 5-bed cycles shown in the patent. The developed model is applied to the separation of hydrogen from reformer off-gas by a PCB activated carbon. The effect of purging amount was examined in view of recovery and productivity and optimum amount is observed. Since the developed model simulates successfully multi-bed PSA processes, it can be used for selecting suitable adsorbent and comparing different PSA cycles quantitatively before experiments. Also, this model can be extended to a more elaborate one to simulate an actual process accurately by including effects that are omitted in this study.
申興秀 홍익대학교 산업기술연구소 1996 産業技術 Vol.6 No.-
Mathematical simulation of a multibed pressure swing adsorption(PSA) process simulate a countercurrent flow for separation of a binary gas mixture is performed. The multibed PSA cycle is simplified to one-bed cycle in order to overcome difficulties simulation a multibed cycle. The mathematcal simulation involves the fomulation of material balances in gas and solid phases. The mass transfer within an adsorbent is described by linear driving force model. The resulting equations are solved numerically with pertinent boundary conditions for each step. Orthogonal collocation is applied for the formulated mathematical model and the resulting ordinary differential equations are integrated by Gear's method. The system considered in this study is nitrogen production from air by carbon molecular sieve. Complete clean-up during purging step is assumed. The simulation results indicate that increase in performance is greastest when the bed number increases from two to three however, it is negligible for more than four beds. The extent of performance improvement is larger for lower product plurity.