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생체분해성 Poly ( DL - lactide - co - glycolide ) 랜덤공중합체 Micelle 에서 약물방출 (Ⅱ)
이동병,차월석,박영훈,김명렬,나재운,김종균 ( Dong Byung Lee,Wol Suk Cha,Yung Hoon Park,Myung Yul Kim,Jae Woon Nah,Chong Kyun Kim ) 한국공업화학회 1997 한국공업화학회 연구논문 초록집 Vol.1997 No.0
N/A The lineary release time according to the kinds of micelles prepared in the ratio 20:20 of DL-PLGA(70:30, 80:20, 90:10) and clonazepam was delayed in the order of DL-PLGA(70:30)>DL-PLGA(80:20)>DL-PLGA (90:10). Amount of drug release according to the kinds of micelles was delayed in the order of DL-PLGA(70:30)>DL-PLGA(80:20)>DL-PLEA (90:10). Homopolymers were not suited for drug carriers because drug release of poly DL-lactide was too delayed and poly glycolide shows the burst effect in early days.
포스터 발표 - 고분자공업분과 : 생체분해성 Poly ( DL - lactide - co - glycolide ) 랜덤공중합체 Micelle 에서 약물방출 (Ⅱ)
이동병,차월석,박영훈,김명렬,나재운,김종균 ( Dong Byung Lee,Wol Suk Cha,Yung Hoon Park,Myung Yul Kim,Jae Woon Nah,Chong Kyun Kim ) 한국공업화학회 1997 한국공업화학회 연구논문 초록집 Vol.1990 No.3
N/A The lineary release time according to the kinds of micelles prepared in the ratio 20:20 of DL-PLGA(70:30, 80:20, 90:10) and clonazepam was delayed in the order of DL-PLGA(70:30)>DL-PLGA(80:20)>DL-PLGA (90:10). Amount of drug release according to the kinds of micelles was delayed in the order of DL-PLGA(70:30)>DL-PLGA(80:20)>DL-PLEA (90:10). Homopolymers were not suited for drug carriers because drug release of poly DL-lactide was too delayed and poly glycolide shows the burst effect in early days.
고무의 기초 연구로써 표면에 위치한 고분자 시스템 거동에 관한 수치모사 연구
박영훈(Yung Hoon Park),김명렬(Myung Yul Kim) 한국고무학회 2000 엘라스토머 및 콤포지트 Vol.35 No.1
N/A In this study as a basic research of the elastomer, we show the results of the behavior of the two different chain length polymers in the melt confined between two impenetrable planes. The cubic lattice simulations are conducted in the canonical ensemble with a method that is a combination of reptation and crackshaft bond flip motions. A total of 680 chains which are 544 short chains comprising 10 beads and 136 long chains comprising 160 beads were placed in 20 lattice layers. It was assumed that there is no energetic interactions between covalently connected beads, while all other neighbors will interact with a truncated 6-12 Lennard-Jones potential. From the analysis of the simulation results, it was shown that purely entropic effects caused the shorter chains to partition preferentially to the surface. We also showed that the center of mass density of the shorter chains shows maximum near the surface. This is the opposite phenomena when compared to that of the longer chains. However, the segments of the shorter and the longer chains did not display any significant changes in bond order.
이온 complex 형성에 의한 Cisplatin이 봉입된 Carboxymethyl Chitosan 나노입자의 제조
남정표 ( Joung Pyo Nam ),김동곤 ( Dong Gon Kim ),정영일 ( Young Il Jeong ),김명렬 ( Myung Yul Kim ),장미경 ( Mi Kyeong Jang ),나재운 ( Jae Woon Nah ) 한국키틴키토산학회 2008 한국키틴키토산학회지 Vol.13 No.1
Carboxymethyl chitosan(CMCh) was prepared by introduction of caroxymethyl group to C6-OH (O-carboxymethyl chitosan, OCMCh) or C2-NH2 (N-carboxymethylc chitosan, NCMCh) position of low molecular weight water soluble chitosan (LMWSC). Composition of CMCh was confirmed by proton-nuclear magnetic resonance spectroscopy (1H NMR). Cisplatinincorporated nanoparticles were prepared by simple mixing of cisplatin and CMCh. Nanoparticles can be prepared by ion complex formation between cisplatin and CMCh. When the feeding amount of cisplatin was increased, drug contents was increased and loading efficiency was decreased. Furthermore, particle size became larger size and zeta potential was decreased by increasing the feeding amount of drug. At the observation of transmission electron microscopy (TEM), cisplatin-incorporated CMCh nanoparticles have spherical shapes with diameter of about 100 nm ~ 300 nm. At drug release study, cisplatin release rate was decreased by increased feeding amount of cisplatin. Nanoparticles from OCMCh showed faster cisplatin release properties than that of NCMCh. Cell cytotoxicity of cisplatin-incorporated CMCh nanoparticles were tested with human embryonic kidney cell, 293T. In the case of cisplatin itself, survived cells were gradually decreased by increasing the concentration of cisplatin from 0.01 ug/ml to 100 ug/ml. When nanoparticles were treated, however, higher than 80% of cells were survived at 10 ug/ml equivalent concentration of cisplatin and about 70% of cells were survived at 100 ug/ml. These results showed that cisplatinincorporated CMCh nanoparticles can be considered as a predominent cisplatin delivery carriers.
오준,김영찬,김명렬 順天大學校 1999 論文集 Vol.18 No.1
The specific heat of molecular sieves 3A(MS 3A) is determined by fitting method for N₂-MS3A system at room temperature. The specific heat obtained for MS3A was 1035 J/㎏·K. The specific heat is also determined by moment method and compared with that from the fitting method. The specific heat of MS3A obtained from the first order moments is similar to that from the fitting method.
PVA복합체의 표면성분과 구조 I. PVA/Gelatin 필름
우명우,김명렬 順天大學校 1994 論文集 Vol.13 No.1
PVA 와 젤라틴 복합체의 표면성분과 구조를 규명하기 위해서 이의 복합체를 공기 중에서 film을 제조하여 XPS를 측정했고,수용액 상테에서 'H- NMR을 측정했다. 이들의 분석결과 film표면에 C,O,N의 성분을 밝혔고 aminogroup을 포함한 수산기의 강한 결합을 나타냈다. ㅁ Surface composition and structure of PVA/Gelatin films were investigated with XPS and the bulk content was measured with ¹H-Neuclear Magnetic Resornance spectrometry (¹H-NMR).From this results, it is possible to calculate of carbon, oxygen and nitrogen and showed hydroxyl and aminogroups.
Poly(vinyl alcohol)(PVA)/Borax 複合體의 流變學的 性質
金明烈 순천대학교 공업기술연구소 1990 工業技術硏究所論文集 Vol.4 No.-
Rheological properties of PVA/Borax complexes in the presence of gelatin were investigated with shear stress(て) as a function of shear rate(r). PVA complexes showed pseudoplastic and 1.5―2.7 of die swell ratio. The apparent viscosity of this complexes were decreased in order to PVA/Borax > PVA/Borax/Gelatin> PVA/Borix Acid and first normal stress differance was increased with increased shear rate.