http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
미세 멜라민입자를 함유한 다단교반형 반응기에서의 이산화황가스 제거
이기호,이제근,전해수,허철구 한국화학공학회 1988 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.26 No.6
기-액 접촉면적과 미세입자의 용해속도를 증진시킬 수 있는 다단교반형 반응기내에서 미세 멜라민입자를 함유한 슬러리 용액에 의한 이산화황산가스 제거실험을 행하였다. 기-액-멜라민입자 슬러리계에서 멜라민 미세입자는 기-액흡수반응이 진행되는 동안 지속적으로 용해되어 흡수반응에 이용됨을 확인할 수 있었으며, SO₂의 흡수는 용액중에 free melamine이 존재하는 한 계속됨을 볼 수 있었다. 또한 반응생성물인 melamine sulfate는 열분해에 의해 쉽게 재생시킬 수 있었으며, 재생된 멜라민은 순수 멜라민과 유사한 SO₂ 흡수특성을 보였다. 멜라민 슬러리 용액의 온도 및 슬러리 농도변화에 따른 멜라민의 이용율은 용액의 온도 및 슬러리 농도가 높을수록 감소하였다. SO₂의 제거효율은 용액의 pH, 슬러리 농도 및 액-기 비, 교반속도 등이 증가함에 따라 증가하였으나, 용액의 온도가 높아지게 되면 감소함을 보였다. The sulfur dioxide gas mixture was bubbled and removed through the water solution which contain suspended melamine particles using a multi-stage agitated reactor to increase gas-liquid interfacial area and the dissolution rate of melamine particles. In gas-liquid-melamine fine particle system, it was found that the melamine fine particles was continuously dissolved and was used in SO₂ absorption. Therefore SO₂ absorption reaction was continued until the free melamine particles was completely consumed. The experiment also showed that the melamine sulfate produced from the reaction was easily regenerated by the thermal decomposition. And the SO₂ absorption capacities of the melamine regenerated by the thermal decomposition was similar to those of fresh melamine. The amount of SO₂ removed per one mole of melamine decreased as the temperature of solution raised and the slurry concentration of solution increased. The SO₂ removal efficiency increased with agitation speed, pH of solution, slurry concentration of solution and liquid-gas flow ratio, however, decreased with the temperature of solution.
이기호 한국연기예술학회 2016 연기예술연구 Vol.8 No.1
연기란 배우가 어떠한 배역을 맡아서 그 역할을 창조하여 관객 또는 카메라 앞에서 재현하는 것을 말한다. 배우가 연기를 하기 위해서는 우선 배역을 맡아야 하고, 역할을 창조하는 과정을 거쳐야 하며, 관객 또는 카메라 앞에서 역할의 행동을 재현(representation)하면서 극적기능을 수행함으로서 완성된다. 관객 또는 카메라 앞에서 배우가 연기를 하는 순간에 배우는 배우이면서도 배우가 아닌 역할로서 존재해 야 하는 매우 특수한 상황에 처하게 된다. 이러한 상황을 만일 배우의 이중의 정체성이라고 볼 때, 본 연구는 배우로 존재하면서도 역할로서도 존재해야 하는 배우와 역할의 정체성의 특수한 공존상태에 관 한 연구이다. 연기자에게 역할을 수행하는데 있어서의 특수한 공존상태는 늘 상 존재한다. 그것은 결코 분리되거나 연기영역에 따라 어느 한쪽 면으로 해석될 수 있는 문제도 아니다. 때문에 배우는 늘 이러한 이중의 정체성을 인정하고 연기행위의 전제를 두어야 한다는 점이다. 이는 연기에 있어서 배우의 정체성 에 대한 잘못된 이해와 혼돈의 문제를 해소하기 위함이다. 더 나아가 본 연구로 인하여 배우가 자신의 연기를 역할화-이입화, 동질화-를 꾀하는데 있어서 효율적인 방향을 고찰한다. Acting refers to an activity in which an actor creates a character and plays it in front of the audience or camera. When the actor plays the role in front of the audience or the camera, the actor is laid in a very special situation in which he/she must exist as an actor and the character at the same time. At any moment of acting, the actor should not exist only as an actor himself, nor should he exist as a role. This means that an actor must maintain dual identity in acting. Actually, some actors understand acting as a complete synchronization of characters, and they sometimes suffer from identity problem and struggle with other actors because of too much empathy with characters. On the other hand, there are actors who always adopt himself/herself into the character making no conflict. This duality of identity is inevitable in all forms of acting since acting is a mimetic activity in its nature as Aristotle defined it in [Poetics]. The dual identity is a common characteristic of acting, but its outcome may look different depending on the style of performance. Some performances require more character-like identity, but others may need more actor-like identity. The proportion is linked to the style of acting. In resolving actor’s identity problem, this paper investigates dual identity in acting, and further acting realm where an actor has to live with the dual identity.
Overdamped Transport of Particles in a Periodic Ratchet Potential
이기호 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.60 No.11
We have employed overdamped Langevin dynamics to study the driven transport of particles in a tilted ratchet potential. The system subject to an applied direct force undergoes an asymmetrical dynamic transition from a static state to a sliding state at different bidirectional critical forces. When an additional alternating force is applied to the system, the mean velocity shows steps as the direct force increases. These plateaus appear whenever the system’s natural frequency given by the direct force matches an integer multiple of the alternating frequency, and are similar to the Shapiro steps on the current-voltage characteristics in rf-driven Josephson junctions. For a rocking ratchet without a direct force, the rectification effect occurs when the alternating force exceeds a certain critical value.
이기호 한국발생생물학회 2015 발생과 생식 Vol.19 No.1
Connexin (Cx) is a complex which allows direct communication between neighboring cells via exchange of signaling molecules and eventually leads to functional harmony of cells in a tissue. The initial segment (IS) is an excurrent duct of male reproductive tract and expression of numerous genes in the IS are controlled by androgens and estrogens. The effects of these steroid hormones on gene expression in the IS during postnatal development have not extensively examined. The present research investigated expressional modulation of Cx isoforms in the IS by exogenous exposure to estrogen agonist, estradiol benzoate (EB), or androgen antagonist, flutamide (Flu), at weaning age. Two different doses of EB or Flu were subcutaneously administrated in 21-day old of male rats, and expressional changes of Cx isoforms in the adult IS were analyzed by quantitative real-time PCR. Treatment of a low-dose EB (0.015 μg/kg body weight) resulted in an increased expression of Cx31 gene and a decreased expression of Cx37 gene. A high-dose EB (1.5 μg/kg body weight) treatment caused an increase of Cx31 gene expression. Increased levels of Cx30.3 and Cx40 transcripts were observed with a low-dose Flu (500 μg/kg body weight) treatment. Treatment of high-dose Flu (50 mg/kg body weight) led to expressional increases of Cx30.3, 40, and 43 genes. Our previous and present findings suggest differential responsiveness on gene expression of Cx isoforms in the IS by androgens and estrogens at different postnatal ages.
Comparison of Oral Biofilm Formation on Materials of Dental Appliances
이기호 대한예방치과학회 2013 International Journal of Clinical Preventive Denti Vol.9 No.3
Objective: Dental appliances have been used to protect teeth or oral mucosa and gingiva from danger and medicaments. However, oral appliances may provide opportunistic infection of oral pathogens by oral biofilm accumulation on dental surfaces. In this study, Biofilm formation of oral bacteria on various oral appliance materials was investigated and compared. Methods: The resilient and rigid materials of denture appliances were used. The biofilm of Streptococcus mutans or salivary bacteria was formed on various materials of denture appliances and then observed by confocal laser scanning microscope. The level of whole bacteria or S. mutans in the biofilm was counted by colony counting using BHI and MSB agar plate. In order to evaluate the cause of differential biofilm formation on the materials, the binding of saliva protein on the materials was investigated. Results: The amount of S. mutans biofilm formed the least on sportquard material. Also, oral biofilm using salivary bacteria formed less on the resilient materials than the rigid materials. The binding of saliva protein on the materials is like propensity of biofilm experiments. Conclusion: The resilient materials of denture appliances bind fewer amount than the rigid materials by which the oral biofilm may form less.
李基浩 梨花女子大學校 韓國生活科學硏究院 1990 韓國生活科學硏究院 論叢 Vol.45 No.-
프로그래밍언어의 형식 사양 중 구문에 대한 형식 정의에 관한 기법을 논했다. 기존의 BNF 문법을 이용한 형식 정의는 Chomsky의 제2형인 context-free 언어군에 국한되어 있기 때문에 제약 조건들은 자연어를 빌어 설명을 하고 있다. 여기서는 BNF보다 훨씬 표기력이 강한 VWF-G(또는 2단계 문법)을 정의하고 그에 대한 특성으로서 대규모 문법의 크기를 축소시킬 수 있고 또 context-sensitive 문법을 표기할 수 있음을 보였다. Formal Specifications of programming languages can affect language designers, implementers, and users. For programming language designers, they improves languages design, for implementers, they help to produce a compilers or interpreter for a programming language. If the language is rigorously formalized, it is easy to verify program correctneess. Users need a definite document to take advantage of the languages facilities. BNF-Grammar is a well-known formalism describing the syntax of programming languages. But BNF-G expresses only the class of context-free grammars. In this paper another formalism, two-level-G(or VWF-G), is presented, which is more powerful than BNF and more capable of manipulating context-sensitive languages.
Phillyrin의 HepG2 세포에서 포도당신생합성에 대한 영향
이기호,타이투엣난,정혜광 忠南大學校 醫藥品開發硏究所 2019 藥學論文集 Vol.34 No.-
Type II diabetes mellitus (T2DM) is a chronic metabolic disease caused by insulin resistance, and its worldwide prevalence has dramatically increased over the past few decades. Increased glucose production through abnormally elevated hepatic gluconeogenesis is central to the manifestation of hyperglycemia in T2DM. Phillyrin, one of the major active constituents of Forsythia suspensa and Forsythia koreana, has been reported to possess the anti-inflammatory and anti-oxidant effects. However, the effect of phillyrin on anti-diabetes mellitus activity and its underlying molecular mechanisms have not been elucidated. In this study, we investigated the inhibitory effects of phillyrin on hepatic gluconeogenesis in HepG2 cells. Phillyrin attenuated forskolin-induced phosphoenolpyruvate carboxykinase (PEPCK) and glucose 6-phosphatase (G6Pase) mRNA expression, major genes in hepatic gluconeogenesis. Furthermore, phillyrin suppressed the forskolin-induced phosphorylation of PKA and CREB, major regulators of glucose metabolism, to modulate hepatic gluconeogenic gene expression. Together, these results suggest that phillyrin could inhibit hepatic gluconeogenesis via PKA/CREB pathway in HepG2 cells.
이기호 한국발생생물학회 2014 발생과 생식 Vol.18 No.4
Direct cell-cell communication through connexin (Cx) complexes is a way to achieve functional accordance ofcells within a tissue or an organ. The initial segment (IS), a part of the epididymis, plays important roles in sperm maturation. Steroid hormones influence on expression of a number of genes in the IS of adult animals. However, developmental effect ofsex hormones on the gene expression in the IS has not been examined. In this study, estradiol benzoate (EB, an estrogenagonist) or flutamide (Flu, an androgen antagonist) was exogenously administrated at 1 week of postnatal age, andexpressional changes of Cx genes in the IS were determined at 4 months of age by a quantitative real-time PCR analysis. Treatment of EB at 0.015 mg/kg body weight (BW) increased expression of Cx30.3, 31.1, and 43 genes. However, treatmentof 1.5 mg EB/kg BW resulted in expressional decreases of Cx31, 32, and 45 genes and caused increases of Cx30.3 and 43 geneexpression. Significant decreases of Cx31, 31.1, 32, 37, and 45 gene expression were detected with a treatment of 500 mgFlu/kg BW, while expression of Cx43 gene was significantly increased with a treatment of 500 mg Flu/kg BW. A treatment of50 mg Flu/kg BW led to significant increases of Cx30.3, 32, 37, 40, and 43 gene expression. These findings imply thatexogenous exposure of steroidal hormones during the early developmental period would result in aberrant expression of Cxgenes in the adult IS.