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계면활성제 Sodium Dioctyl Sulfosuccinate (EU-DO133L)을 사용한 이산화규소/ 스티렌의 코어-셀 고분자의 합성
김덕술(Duck Sool Kim),박근호(Keun Ho Park) 한국유화학회 2009 한국응용과학기술학회지 Vol.27 No.2
Core-Shell polymers of silicone dioxide-styrene system were prepared by sequential emulsion polymerization. In inorganic/organic Core-Shell composite particle polymerization, silicone dioxide adsorbed by surfactant sodium dioctyl sulfosuccinate (EU-DO133L) was prepared initially and then core silicone dioxide was encapsulated emulsion by sequential emulsion polymerization using styrene at the addition of potassium persulfate (KPS) as an initiator. We found that SiO2 core shell of SiO2/styrene structure was formed when polymerization of styrene was conducted on the surface of SiO2 particles, and the concentration sodium dioctyl sulfosuccinate (EU-DO133L) was 0.5∼2.0g. The structure of core-shell polymer were investigated by measuring to the thermal decomposition of polymer composite using thermogravimetric analyzer and morphology of latex by scanning electron microscope(SEM).
컴퓨터 분석에 의한 Myosin Head의 SH가 Actin-Myosin Cross-Bridges에 따른 구조변화 연구
김덕술 ( Duck Sool Kim ),옥수열 ( Soo Yol Ok ),박근호 ( Keun Ho Park ) 한국유화학회 2005 한국응용과학기술학회지 Vol.22 No.1
N/A IASL(iodo acetamide) and MSL(maleimide) disordered the orderly helix arrangement of myosin in the rest state of spin level. Especially the effect of IASL was great. Equatorial reflection(10,11) change inferred that myosin head was moved to the vicinity of actin filament by spin level. The intensity change of 143Å and 72Å could offer information of the mass projection of population of myosin heads along the filament axis. The slope of intensity profile of the mass projection of 143Å and reflection of IASL is appeared and that of MSL is appeared sharply. The decrease of 215Å reflection intensity is appeared the periodical characteristic of 143Å reflection by spin label. The raise of MSL actin reflection at 51Å and 59Å in the actin reflection change refers that the shifted myosin head binds a certain actin or changes an actin structure by spin label effect. Because iodo acetamide has a tendency to decease the actin reflection, actin close not bind myosin head. From this result, we could conclude that LASL and MSL are spin labeled on SH of myosin head and disordered the helix arrangement of actin.
탱자 추출물에서 항염증 활성을 갖는 쿠마린 유도체의 효능에 관한 연구
김덕술 ( Duck Sool Kim ) 한국유화학회 2012 한국응용과학기술학회지 Vol.29 No.4
탱자에는 여러 종류의 monoterpenes, limonoids, flavonoids과 coumarins 등의 구성성분으로 이루어져 있다. 탱자의 구성 성분중에 7-제라닐옥시쿠마린는 7개의 탄소로 구성된 제라닐옥시기의 곁사슬을 가진 물질이다. 그리고 7-제라닐옥시쿠마린은 여러 약리적인 효과들을 나타낸다고 알려져 있다. 본 연구에서는 탱자의 구성성분인 7-제라닐옥시쿠마린과 이들의 다양한 유도체를 합성하였다. 그리고 항염증에 대한 항염증 효능을 알아보기 위하여 염증을 유발하는 일산화질소 억제 cytokine을 측정한 결과는 6-제라닐옥시쿠마린의 성분이 사이토카인인 인터루킨-6가 1μM농도에서68.9% 를, 10μM에서 72.6% 의 저해효과를 나타냈다. Trifoliate orange components consist of several kinds, such as monoterpenes, limonoids, flavonoids, and coumarins. Coumarin derivatives were shown to possess valuable pharmacological properties such as anti-inflammatory and dietary effect. Among them, 7-geranyloxycoumarin 6 is a promising chemopreventive agent againist skin, tongue, oesophaqus and colon carcinogenesis in rodents. Seven new coumarin derivatives structurally related to 7-geranyloxycoumarin were synthesised in good yields by Cs2CO3/acetonitrile condition. We investigated the effect of anti-inflammatory activity on interleukin-6 for synthesised geranyloxycoumarin derivatives. 6-Geranyoxycoumarin 9 (68.9% / 1μM ; 72.6% / 10μM) of the anti-inflammatory activity is far higher than 7-Geranyloxycoumarin 5 (40.1% / 1μM ; 61.1% /10μM) and their other derivatives.
Twitch Stimulation에 의한 Myosin Heads 움직임의 시간분석 연구
김덕술 ( Duck Sool Kim ),정정수 ( Jung Su Jung ),박근호 ( Keun Ho Park ) 한국유화학회 2004 한국응용과학기술학회지 Vol.21 No.2
N/A On contraction of the muscles, marked changes in X-ray reflections are observed, suggesting that conformational changes of contractile molecules and the movement of myosin heads during muscle contraction. Time slice requires tension peak after the onset of stimulation and the height of tension peak depends on the number of twitch cycle. The muscles were stimulated by five successive stimuli at an interval of 80 ms started while the tension was still being exerted by the muscles. The intensity of I_(11), I_(10), 143Å and 215Å reflection measured with 5ms time resolution and is recorded in isometric tension. The peak height of In and 143Å intensity is changed after the onset of a stimulation I_i, and the length of twitch is shortened by successive twitches in the case of stimulation T_i. On the other hand, the peak height of I_(11) and 215Å intensity starts to decrease at the 1st twitch and remains constant at low peak height without appreciable recovery during the contraction term. In the case of successive twitch stimulation, the myosin heads of muscle are once moved from their resting position and never returned to their initial position.
모발에 좋은 오존수를 이용한 이동식 샴푸 장치 개발에 관한 연구
김덕술(Duck Sool Kim) 한국유화학회 2017 한국응용과학기술학회지 Vol.34 No.2
본 연구는 오존수를 이용한 인체공학적 샴푸대가 분리 가능하고 미세분사 형식의 샤워헤드와 높낮이 조절이 가능한 샴푸대를 개발할 수 있는 장치기술 및 그 방법을 제시하고자 한다. 개발결과 기존의 장치보다 피시술자 머리가 세발대 안으로 들어오는 인체공학적 디자인과 목받이 부분을 높게 제작하여 물튀김 방지를 완성하였다. 실험결과 물을 공급하는 통에 부착되어 있는 온수 유지 히터를 통해 피시술자의 기호에 맞는 온도를 설정하여 시술 시 지연 시간 없이 온수 세발 가능하도록 온도센서를 통하여 확인한 결과 수온유지(38℃)가 일정하게 유지되었다. 그리고 오존수 변환장치 설치로 자체 살균(1PPM) 및 정화 기능까지 가능한 장치의 효용성을 알 수 있었다. 오존수를 20분 정도 측정한 결과 오존 농도가 1PPM 이하로 측정되어 안정성을 확보하였다. 최종적으로 오존수를 20분 정도 측정한 결과 오존 농도가 1PPM 이하로 측정되어 안정성을 확보하였고, 온수장치와 오존수 변환장치와 함께 이동 샴푸대의 모든 부분이 사용자가 사용하기에 불편함이 없도록 설계 하였다. The goal of this study is to suggest the technology and the way of developing ergonomic shampoo device, which is able to adjust the height and to be devided, and it uses ozone water. As a result of developing the device, it can complete better the effect of preventing water splash than existing devices by making neck holding part higher. And it is also made with ergonomic design, therefore, the head of shampoo candidate can be drawn into it more easily. By adjusting water temperature(38℃) to candidate s taste through water heater attached to water bucket, when a candidate is being shampooed, it can help keep warm shampooing without delaying. We could know the process through temperature sensor. And we could also know the utility of its own sterilization(1PPM) and purification. Finally, ozone water was measured for 20 minutes and the ozone concentration was measured to be less than 1 PPM to ensure stability. All parts of the mobile shampoo stand together with the hot water device and the ozonated water conversion device were designed so as not to be inconvenient for the user to use
Thermal Decomposition of Copolymers of Butyl methacrylate and Styrene Produced in a CSTR
김덕술 ( Duck Sool Kim ),김남석 ( Nam Seok Kim ),박근호 ( Keun Ho Park ) 한국유화학회 2002 한국응용과학기술학회지 Vol.19 No.4
N/A Thermal decomposition of the copolymer of butyl methacylate(BMA) with styrene(St) was investigated. The copolymer was obtained at 80℃ in a continuous stirred tank reactor(CSTR) using toluene and benzoyl peroxide(BPO), as solvent and initiator, respectively. The reactor volume was 0.3 liters and residence time was 3 hours. The thermal decomposition followed the second order kinetics for BMA/St copolymer. The activation energies of thermal decompositon were in the ranges of 38∼43㎉/mol for BMA with St copolymer and a good additivity rule was observed with the composition of copolymer. The thermogravimetric trace curve agreed well with the theoretical calculation.
김덕술 ( Duck Sool Kim ),노언주 ( Eon Joo Roh ) 한국유화학회 2011 한국응용과학기술학회지 Vol.28 No.2
Coumarin derivatives were shown to possess valuable pharmacological properties such as anticancer/anti carcinogenic, anti-inflammatory, anti helicobacter, anti genotoxic, neuroprotective and dietary effect. In this study, novel coumarin derivatives structurally related to 7-geranyloxycoumarin were effectively synthesised in good yields by Cs2CO3/acetonitrile in mild condition. The synthesis of geranyloxycoumarin derivatives in weak base(Na2CO3, K2CO3, Cs2CO3 etc)/CH3CN at room temperature obtained in good yield. On the other hand, the reaction of geranyloxycoumarin formation in strong base(NaOH, KOH, CsOH etc)/CH3CN at reflux condition obtained in low yield.