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Chitosan - g - Poly ( 4- vinyl pyridine ) 공중합체막을 통한 인슐린의 투과 특성
김공수,강석호,김수종,임정규 ( Kong Soo Kim,Seog Ho Kang,Soo Jong Kim,Jeong Kyu Lim ) 한국공업화학회 1994 공업화학 Vol.5 No.4
Chitosan-g-Poly(4-vinyl pyridine)공중합체막을 제조하였으며 Chitosan-g-Poly(4-vinyl pyridine)공중합체막과 아크릴아마이드를 사용하여 glucose oxidase를 포함하는 chitosan/acrylamide 복합막을 제조하였다. Chitosan-g-poly(4-vinyl pyridine)공중합체막의 함수율과 인슐린의 투과량은 용액의 pH가 감소함에 따라 증가하였고, 복합막의 인슐린 투과량은 글루코오스의 농도가 증가할수록 증가하였다. Chitosan-g-poly(4-vinyl pyridine)membranes were prepared by crosslinking reaction using glutaraldehyde and glucose oxidase immobilized chitosan/acrylamide composite membranes were fabricated by chitosan-g-poly(4-vinyl pyridine) copolymer and acrylamide. Water content and permeability of insulin through chitosan-g-poly(4-vinyl pyridine)membranes increased with decreasing the pH of the medium Permeability of insulin through chitosan/acrylamide composite membranes increased with increasing the concentration of glucose.
김공수,강석호,박명환,이상호 ( Kong Soo Kim,Seog Ho Kang,Myung Hwan Park,Sang Ho Lee ) 한국공업화학회 1994 공업화학 Vol.5 No.6
분산중합으로 합성한 폴리스티렌 seed를 사용하여 seed 중합방법으로 단분산성인 다공성 스티렌-디비닐벤젠(St-DVB) 겔과 아크릴로니트릴-에틸렌 디메타크릴레이트(AN-EDMA) 겔을 제조하였다. 합성한 St-DVB 겔과 AN-EDMA 겔은 HPLC용 충진제로 적합한 좁은 입도분포와 다공성을 갖고 있으며, 이들 겔을 충진한 GPC 또는 HPLC용 column은 비교적 높은 효율을 나타내었다, 또한 AN-EDMA 겔을 아미드옥심화한 AAN-EDMA 겔에 대한 Cu^(2+) Cd^(2+) 및 UO₂^(2+) 이온의 흡착특성을 시험하였다. Monodisperse porous poly(styrene-co-divinylbenzene)(St-DVB) gel and poly(acrylonitrile-co-ethylene dimethacrylate)(AN-EDMA) gel have been prepared by seed polymerization using polystyrene seeds, which were prepared by dispersion polymerization. The St-DVB and AN-EDMA gels had a narrow size distribution and pores suitable for packing materials of HPLC. The columns packed with these gels were proved to have high efficiency for GPC or HPLC columns. Adsorption properties of Cu^(2+), Cd^(2+) and UO₂^(2+) ions on AAN-EDMA gel prepared from amidoximation of AN-EDMA gel were also determined.
단분산성 다공의 폴리아크릴로니트릴 - 에틸렌 글리콜 디메타크릴레이트 마이크로 겔의 제조 및 특성
김공수,강석호,김영식 ( Kong Soo Kim,Seog Ho Kang,Young Sik Kim ) 한국공업화학회 1996 공업화학 Vol.7 No.4
Seed 중합 방법에 의하여 단분산성 다공의 폴리아크릴로니트릴-에틸렌글리콜 디메타크릴레이트 (PAN) 고분자 마이크로 겔이 제조되었다. PAN 마이크로 겔의 물리적인 특성을 모노머/seed와 희석제/모노머의 비율, 가교제의 농도 및 희석제의 종류에 따라 연구하였다. PAN 마이크로 겔의 입도 분포는 모노머/seed의 비율이 50 이하 일 때 단분산성을 나타냈으며, 가교제의 농도가 증가할수록 입자 내부의 미소 구체 (microsphere)의 크기가 작아져 더욱 밀집된 형태를 나타내기 때문에 입자의 비표면적이 증대되었다. 또한 희석제로 톨루엔을 사용하고 희석제/모노머의 비율이 1.0일 때 입자표면의 세공이 가장 발달되었다. Uniform sized-porous poly(acrylonitrile-ethylene glycol dimethacrylate) (PAN) microgels were synthesized by seed polymerization using monodisperse polystyrene seed particles. The effect of weight ratios of monomer/seed (M/S) and diluent/monomer (D/M), concentration of crosslinking agent and the type of diluent was investigated on the formation of PAN microgels. The particle size distribution of PAN microgels was found to be monodisperse in that the weight ratio of M/S is less than 50. More porous microgels were formed and the interstices between small sized interior microspheres present inside of PAN microgels were also smaller with increasing crosslinking agent concentration. Well-developed pore structure was found to be in that weight ratio of D/M is 1 and toluene is used as a diluent.
다공성 고분자 마이크로겔의 Bovine Serum Albumin 단백질의 흡착평형
김공수,강석호 ( Kong Soo Kim,Seog Ho Kang ) 한국공업화학회 1998 공업화학 Vol.9 No.2
물리·화학적인 특성이 다른 다공성 고분자 마이크로겔에 대한 bovine serum albumin(BSA-protein) 단백질의 흡착평형 특성을 연구하였다. 수용액 속에서 고분자와 단백질사이의 소수성 상호작용에 의하여 폴리부틸메타크릴레이트(PBMA) 마이크로겔이 폴리비닐피리딘 (PVP)과 플리아크릴로니트릴 (PAN) 마이크로겔보다 높은 흡착특성을 나타내었으며, PBMA 마이크로겔이 PVP와 PAN 마이크로겔보다 비가역적으로 흡착평형 특성을 나타내었다. 그러므로 고분자 마이크로겔의 물리적인 특성과 단백질-고분자 마이크로겔 사이의 정전기적 인력보다는 소수성 상호작용이 단백질의 흡착특성에 중요한 역할을 하고 있음을 알 수 있다. 또한 PBMA, PVP 및 PAN 마이크로겔 모두 Freundlich 흡착 등온식보다는 Langmuir 흡착 등온식에 잘 적응되었다. The adsorption equilibrium properties of bovine serum albumin(BSA-protein) for three kinds of porous microgels with different physical and chemical features were investigated. The adsorption amount of BSA-protein on poly(butyl methacrylate) (PBMA) microgels was higher than those on poly(vinyl pyridine) (PVP) and poly(acrylonitrile) (PAN) microgels due to the hydrophobic interaction between polymer and protein in an aqueous solution. And PBMA microgels had more irreversible adsorption equilibrium properties than PVP and PAN microgels. It implies that hydrophobic interaction plays a more important role in adsorption properties of BAS-protein than physical properties of polymer and electrostatic attraction between protein and polymer microgels. Characteristics of the microgels used in this study followed Langmuir equation better than the Freundlich equation.
임신과 동반된 급성백혈병과 골수이형성증후군 증례보고 4예
김조영 ( Kim Jo Yeong ),조진호 ( Jo Jin Ho ),장성운 ( Jang Seong Un ),김현철 ( Kim Hyeon Cheol ),강석호 ( Kang Seog Ho ),조형준 ( Jo Hyeong Jun ),이경미 ( Lee Gyeong Mi ),은미나 ( Eun Mi Na ),정상근 ( Jeong Sang Geun ),김윤아 ( Ki 대한산부인과학회 2003 Obstetrics & Gynecology Science Vol.46 No.5
We have reviewed the medical records of 4 pregnant patients with concomitant acute leukemia at our institution in conjunction with determining the delivery process in order to reduce complications associated with the delivery. Of the 4 patients, three cases were diagnosed as acute leukemia and the other as myelodysplastic syndrome. One experienced an incomplete abortion at gestational age of 10 weeks, after remission induction chemotherapy. The remaining three patients made delivery at full term by Cesarean section. Our observation indicated that Cesarean delivery was advisable for these three patients. Most of the patients had thrombocytopenia or anemia. Before the Cesarean section or dilatation or evacuation, transfusion was undertaken to prevent hemorrhage or severe anemia. In the cases of refractoriness to blood transfusion, a greater amount was transfused. After Cesarean section, some complications were reported such as fever, delayed wound repair, and vaginal bleeding. Based on the our observations, we are of the opinion that pregnant women with acute leukemia or myelodysplastic syndrome can be managed even in those cases where the state of leukemia is not in complete remission or chemotherapy-induced cytopenia is. And the proper measures are timely undertaken to prevent complications associated with delivery.
Polystyrene Seed를 이용한 중공형 산화니켈의 합성
이진화 ( Lee Jin Hwa ),이상길 ( Lee Sang Gil ),강석호 ( Kang Seog Ho ),표형배 ( Pyo Hyeong Bae ),이동규 ( Lee Dong Gyu ) 한국공업화학회 2004 공업화학 Vol.15 No.3
Polyvinylpyrrolidone (PVPD), sodium dioctyl sulfosuccinate (Aerosol-OT), styrene, azobis-isobutylonitrile (AIBN) 등을 사용하여 polystyrene seed를 합성하였다. 이렇게 얻어진 seed를 nickel nitrate 용액속에서 코팅시켰다. 코팅 최적조건은 polystyrene seed 0.1 g, polyvinyl pyrrolidone 0.65 g, urea 54 g, nickel nitrate 1.25 g을 90 ℃ 반응온도에서 반응시간 3h 이었다. 실험 변수로는 반응온도, 반응시간, 출발물질의 농도를 변화시켰다. 코팅된 polystyrene seed를 450 ℃로 열처리하여 중공형 니켈산화물을 얻었다. Polystyrene seed was synthesized by using polyvinylpyrrolidone(PVPD), sodium dioctyl sulfosuccinate (Aerosol-OT), styrene, and azobis-iso-butylonitrile(AIBN). The polystyrene seed was coated with nickel nitrate solution. The optimal synthetic condition had the composition of 0.1 g of polystyrene seed, 0.65 g of polyvinylpyrrolidone, 54 g of urea, and 1.25 g of nickel nitrate, and they were reacted for 3 hrs at 90 ℃. Experimental parameters depended on reacting temperature, reacting time and concentration of starting materials. The hollow sphere nickel oxide was obtained by heat-treatment of coated polystyrene seed at 450℃.
여성의 복압성 요실금의 수술적 치료에서 Tension-free vaginal tape (TVT)과 Burch colposuspension의 비교
김조영 ( Kim Jo Yeong ),정희성 ( Jeong Hui Seong ),이영태 ( Lee Yeong Tae ),차선희 ( Cha Seon Hui ),김현철 ( Kim Hyeon Cheol ),강석호 ( Kang Seog Ho ),조진호 ( Jo Jin Ho ) 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.2
Objective : The purpose of this study was to compare the effectiveness, easiness, postoperative complications between tension-free vaginal tape (TVT) and Burch colposuspension (BC) in the surgical management of female genuine stress urinary incontinence. Methods : A retrospective study of 77 cases with stress urinary incontinence at Department of Obstetrics and Gynecology and Urology, Pochon CHA University Medical College from January 2000 to December 2002, followed up more than 6 months. All of 77 cases were above grade 2 genuine stress urinary incontinence, 37 cases were performed tension-free vaginal tape, 40 cases were performed Burch coloposuspension. Results : Cure rate was 91.4% in the tension-free vaginal tape (TVT) group, 90% in the Burch colposuspension group. The mean operative time for TVT was 23.4 minutes and for Burch colposuspension was 47.2 minutes. The mean hospital stay in TVT was 1.8 days and in Burch colposupension was 5.2 days. The incidence and severity of postoperative complication is similar in both groups. Conclusion : The cure rates of TVT were comparable with Burch colposuspension in the surgical management of female genuine stress urinary incontinence. And the incidence and severity of postoperative complication is similar in both groups. Moreover TVT is simple procedure more than Burch colposuspension.