나노크기 은촉매를 이용한 에틸렌 산화반응

이상량,정유성,신재순,김영철,박남국 한국공업화학회 2002 응용화학 Vol.6 No.2

Partial oxidation of ethylene to ethylene oxide was studied using silver caralystsiadeposited on a low surface area support, such as d-alum(< 1 m^2/g). Theselectivity to ethylene oxide has been reported to be related to the surface area ofactive silver species. Thus the activity of silver catalysts was studied in view of theparticle size of Ag.The catalyst prepared by water-alcihol method showed higheractivity. The addition of Cs as a promoter at higher temperature was observed toincrease catalytic activity of silver catalysts, presumably by increasing the surfaceares of active silver.

다중양자 NMR 역학에 관한 연구

김남수,양경승,신용진 조선대학교 기초과학연구소 1999 自然科學硏究 Vol.22 No.1

Studied in this paper is how multiple quantum coherence develops in the anisotropic distribution of dipolar couplings. The magnitude of dipolar couplings was varied with oriented angles. The larger dipolar coupling was, the bigger frequency of multiple quantum coherence was. The multiple quantum coherence is decided with proportion of the magnitude of dipolar couplings. The theory equation for multiple quantum coherence and the magic angle 54.7˚in the solid NMR spectroscopy was verified in our research. The excitation pattern of n-Quantum coherence, which can induce the effective size to characterize spin system, is expected in larger and more complicated spin system for understanding the relation of dipolar coupling and multiple quantum coherence.

누두흉 환자에서 Nuss 금속막대 제거 전 · 후 폐 역학 변화

강규식,백남순,김천숙,안기량,권진형,김지은,유시현 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.1

Nuss operation is one of the surgical procedure for pectus excavatum and it's method is the insertion of convex steel bar under the sternum through small bilateral thoracic incision. As the patients is growing, the thorax can be compressed gradually by steel bar. So Nuss bar needs to be removed two years after Nuss operation. This study was undertaken to assess the effect on the repiratory mechanics before and after the removal of the Nuss bar. Twenty patients with previous Nuss operation were allocated for the removal of Nuss bar. Lung mechanics (dynamic lung compliance, static lung compliance, and airway resistance), hemodynamic change (heart rate, systolic pressure, and diastolic pressure), and pulmonary gas exchange (arterial oxygen tension, arterial carbon dioxide tension, pulse oximeter saturation, and end tidal carbon dioxide tension) were measured before and after removal of Nuss bar. Respiratory mechanics (dynamic and static lung compliance, inspiratory airway resistance), pulmonary gas exchange and hemodynamic parameter were unchanged before and after the removal of Nuss bar. We concluded that lung mechanics were not changed before and after the removal of Nuss bar in the patients with pectus excavatum and the 95% patients were satisfied with operation.

나노크기의 은 촉매제조 및 특성분석

정유성,이상량,신재순,김영철,박남국 한국공업화학회 2002 응용화학 Vol.6 No.2

Nano-sized silver catalysts have been prepared by alcohol and dioctyl esterof sodium sulphosuccinic acid, anionic surfactant, Aerosol OT(AOT). TOD/TPR andethylene oxide activity have been studied to investigate the characteristics of silvercatalysts. The sizes of Ag particles were estimated to be 10∼16 nm and the peak ofsilver oxide was not observed by XRD except for metallic silver. The desorptionpeak of molecular oxygen by TPD/TPR uniqely observed at about 400 ℃ in thecatalyst prepared by water-alcohol method. However, in the catalyst prepared bymicroemulsion method, the desorption peaks of molecular and atomic oxygens wereobserved at about 400 ℃ and 600 ℃, respectivly. The catalyst prepared by water-alcohol method showed higher activity ethylene oxide than the catalyst prepared by microemulsion method. It eems due to the larger silver particles and easier desorption of molecular oxygen from the catalyst prepared by water-alcohol method.

Curcumin-Loaded PLGA Nanoparticles Coating onto Metal Stent by Electrophoretic Deposition Techniques

Nam, So-Hee,Nam, Hye-Yeong,Joo, Jae-Ryang,Baek, In-Su,Park, Jong-Sang Korean Chemical Society 2007 Bulletin of the Korean Chemical Society Vol.28 No.3

Restenosis after percutaneous coronary intervention (PCI) continues to be a serious problem in clinical cardiology. To solve this problem, drug eluting stents (DES) with antiproliferative agents have been developed. Variable local drug delivery systems in the context of stenting require the development of stent manufacture, drug pharmacology and coating technology. We have worked on a system that integrates electrophoretic deposition (EPD) technology with the polymeric nanoparticles in DES for local drug delivery and a controlled release system. The surface morphology and drug loading amount of DES by EPD have been investigated under different operational conditions, such as operation time, voltage and the composition of media. We prepared poly-D,L-lactide-co-glycolic acid (PLGA) nanoparticles embedded with curcumin, which was done by a modified spontaneous emulsification method and used polyacrylic acid (PAA) as a surfactant because its carboxylic group contribute negative charge to the surface of CPNPs (?53.5 ± 5.8 mV). In the process of ‘trial and error' endeavors, we found that it is easy to control the drug loading amount deposited onto the stent while keeping uniform surface morphology. Accordingly, stent coating by EPD has a wide application to the modification of DES using various kinds of nanoparticles and drugs.

Thermomechanical and optical properties of molecularly controlled polyimides derived from ester derivatives

Nam, Ki-Ho,Kim, Hyeonil,Choi, Hoi Kil,Yeo, Hyeonuk,Goh, Munju,Yu, Jaesang,Hahn, Jae Ryang,Han, Haksoo,Ku, Bon-Cheol,You, Nam-Ho Elsevier 2017 Polymer Vol.108 No.-

<P><B>Abstract</B></P> <P>New diamines for high-performance poly(ester imide)s (PEsIs) containing dimethyl groups at the <I>ortho</I>-position of amino groups and ester derivatives have been developed to improve optical transparency and glass transition temperature (T<SUB>g</SUB>) while maintaining a low coefficient of thermal expansion (CTE). Four kinds of PEsIs derived from bis(4-amino-3,5-dimethylphenyl) terephthalate (BADMT) and aromatic dianhydrides such as 1,2,4,5-benzenetetracarboxylic dianhydride (PMDA), 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA), 4,4’-oxydiphthalic anhydride (ODPA), and 4,4'-(hexafluoroisopropylidene)diphthalic (6FDA) were synthesized via a two-step polycondensation. All PEsIs exhibited outstanding properties, such as light color, a good transmittance of >90% at 550 nm, high T<SUB>g</SUB> above 289 °C and 5% weight loss temperature (483–511 °C), and low CTE (11–68 ppm/°C). The effect of the substituent on molecular packing and properties, including optical and thermomechanical properties for the resulting PEsIs were examined in detail. The temperature-dependent CTE of the PEsIs was determined using molecular dynamics (MD) simulation. The molecular orbital (MO) calculation models support the discussions on the electronic substituent effect of the PEsI main chains. Our molecular architecture and systematic property studies with MD and MO promote a better understanding of the polyimides.</P> <P><B>Highlights</B></P> <P> <UL> <LI> New diamines for high-performance poly(ester imide)s (PEsIs) have been developed. </LI> <LI> The polymer films exhibited a good transmittance of >90% at 550 nm, high T<SUB>g</SUB> above 289 °C and 5% weight loss temperature (483–511 °C), and low CTE (11–68 ppm/°C). </LI> <LI> Molecular dynamics (MD) simulation was performed to study the CTE of PEsIs and the agreement between measured and simulated results was acceptable. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Low CTE and transparent poly(ester imide)s (PEsIs) containing dimethyl groups at the <I>ortho</I>-position of amino groups was newly synthesized.</P> <P>[DISPLAY OMISSION]</P>

현대 중국어 이용물-이용자 구문 연구 ― 구문논항과 구문다의성을 중심으로

남양우 ( Nam Ryang-woo ) 중국어문연구회 2016 中國語文論叢 Vol.0 No.77

There are special sentences in modern Chinese like “yi guo fan chi shi ge ren”. In this sentence, although `shi ge ren` is a agent, it is located at object not subject. Obviously it`s unusual. We pay attention this phenomenon , and discussed it based on construction grammar. The concludes are as below. First, the object of use-user construction is the construction that is defined by construction grammar. The object of use-user construction implies `possibility of using`, but it can`t be predictable from component parts of this sentence. Second, arguments are important element in construction grammar. We generate infinite sentences by using limited sentence structure. When we distinguish only based on sentence structure, there can be mistake that we assign regardless construction to same construction. We can resolve it through argument. The argument of the object of use-user construction is < the object of use user >. Third, construction meaning of the object of use-user construction is that some user can use some objects of use. Fourth, the object of use-user construction has polysemy. By admit polysemy, we can recognize non-prototype the object of use-user construction like “wu jian yi fu zhuang yi zhi xiang zi”” as same construction. Finally, we can organically recognize the object of use-user construction which has various meaning, and we can also explain this construction based on one mechanism.

논문(論文) : 동태존재구문에 대한 인지적 접근

남양우 ( Ryang Woo Nam ) 중국어문연구회 2016 中國語文論叢 Vol.0 No.73

In this paper, we discussed two problems. First problem is that we regard the dynamic existential construction which implies dynamic state as the existential construction which implies static state, what does it make possible? First mechanism is the construction coercion. The construction coerces dynamic state of dynamic existential construction and strengthen the meaning of existential construction which is that there is something in a place. Second mechanism is the summary scanning. We cognize the dynamic existential construction as static scene through summary scanning. Second problem is that both constructions, static existential construction and dynamic existential construction, are same or not. We claim that there is an inheritance relation between these constructions. They are parts of existential construction``s category, but they are also each individual constructions. They form their own categories, and they have extended structures internally. We can account for how are these constructions connected by understanding them based on inheritance links. Also, we can grasp static existential construction and dynamic existential construction multidirectionally.

파자구(把字句)에 대한 구문문법적 해석

남양우 ( Nam Ryang Woo ) 한국외국어대학교 중국연구소 2020 中國硏究 Vol.82 No.-

This paper discussed the traditional ‘ba’ construction by applying the concept of argument structure construction and the link. The discussion in this paper can be summarized as follows: First, the verbs used in causative ‘ba’ construction are ‘给予类’, ‘放置类’ and ‘当做类’, and ‘当做类’ is a metaphorical extention of ‘给予类’ and ‘放置类’. Second, cause-move ‘ba’ construction has construction arguments < agent theme goal >. And state-change ‘ba’ construction has construction arguments < agent theme >. These two constructions have different construction arguments, moreover the constructional meanings are different. Therefore, the cause-move ‘ba’ construction and the state-change ‘ba’ construction are independent of each other. The two constructions , however, are organically linked, and they are linked by the complex link which is mixture of subpart link and metaphorical extension link. Third, causative ‘ba’ construction has construction arguments < cause theme >, and it is a untypical ‘ba’ construction because its verb is intransitive. Causative ‘ba’ construction and state-change ‘ba’ construction seem to be different constructions, but causative ‘ba’ construction is extension of state-change ‘ba’ construction. And they are linked by polysemy link. Fourth, the affected ‘ba’ construction has the construction arguments < experiencer theme >, it is also a untypical ‘ba’ construction because its verb is intransitive. Subject of cause-move ‘ba’ construction, state-change ‘ba’ construction, causative ‘ba’ construction can affect object of ‘ba’, whereas the subject of affected ‘ba’ construction is affected by object of ‘ba’. In this way, the affected ‘ba’ construction is the most untypical and innovative ‘ba’ construction. This construction is formed under the influence of two different constructions, it was influenced by causative ‘ba’ construction in formal parts and it was influenced by ‘possessor-subject possessee-object’ construction in meaning and usage.

현대중국어 정태존재문의 동사 연구

남양우 ( Ryang Woo Nam ) 한국외국어대학교 중국연구소 2015 中國硏究 Vol.65 No.-

If we regard existential sentence as a construction, static existential sentence is the most typical existential construction. Therefore, the research of static existential verbs is a starting point of a study about existential verbs. This study classified static existential verbs based on verb meaning and found out that most static existential verbs consist of meaning group. And we simplified these verbs to lexical semantic template of six groups by using lexical conceptional structure, and these templates show us the syntactical structure and features of static existential verbs. It``s very helpful for us to intuitionally understand static existential verbs. Static existential verbs have four features. First, most static existential verbs are transitive verb. Second, it is related to locational movement. Third, location argument is very important. Fourth, it has to indicate state duration stage of event structure.