• 약학회지
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• 제38권2호
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• pp.107-113
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• 1994

Ally alcohol is metabolized in the liver through two steps, first to reactive acrolein by alcohol dehydrogenase(ADH), subsequently to acrylic acid by aldehyde dehydrogenase(ALDH). Since ethanol could compete the same enzymes to be metabolized in the liver, we have studied the interaction between allyl alcohol and ethanol on liver toxicity. Simultaneous treatment of 2 g/kg ethanol by ip administration with 40 mg/kg allyl alcohol to rats increased the lethality significantly, accompanied by potentiation of the loss of hepatic glutathione. Collectively, these findings suggested that ethanol potentiated the hepatotoxicity and lethality induced by allyl alcohol probably through competing two metabolizing enzymes, ADH and ALDH.

• Journal of Magnetics
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• 제8권2호
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• pp.85-88
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• 2003

The magnetic and transport properties far single crystals of Ru-doped mono-layered manganites $La_{0.5}Sr_{1.5}-Mn_{1-x}Ru_xO_4$ (0$\leq$$\chi$$\leq$0.1) have been studied using neutron diffraction and magnetization measurements. Temperature dependent magnetization data reveal that with an increase in the Ru concentration the parent charge ordered antiferromagnetic state is gradually destroyed and new ferromagnetic phase evolves. In the low Ru-doped system spin glass behavior is apparent in low temperature region, which is confirmed by ac and do magnetization measurements. The competing magnetic interaction between Mn/Mn and Mn/Ru couples is the most likely cause of the spin glass transition.

• 한국환경과학회지
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• 제11권10호
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• pp.1069-1074
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• 2002

The growth and heavy metal experiments revealed oppositive interactions between toxic metals(Zn and Cd) and Mn when the coastal diatom T. pseudonana were used. Cd and Zn inhibited the algal growth rate only at low Mn ion concentrations and this effect could be accounted for an inhibition of cellular Mn take by the toxic metals. Mn and Zn inhibited cellular Cd take and this indicated a reciprocal effects among the metals with respect to metal take. Saturation kinetics modeling of the take data was consistent with two metals competing with each other for binding to the Mn take system and with both Cd and Mn being transported into the cell by that system. Mathematical modeling of Mn and Cd take data revealed evidence fur a Cd efflux system.

• 대한산업공학회지
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• 제29권1호
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• pp.14-20
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• 2003

The purpose of this paper is an attempt to analyze the dynamic relationship between KSE and KOSDAQ, two competing markets in Korean stock market, in the viewpoint of competition. Lotka-Volterra model, one of well-known competitive diffusion model, is adopted to represent the competitive situations of Korean stock market and it is estimated using daily empirical index data of KSE and KOSDAQ during 1997~2001. The results show that there existed a predator-prey relationship between two markets in which KSE acted as a predator right after the emergence of KOSDAQ. This interaction was altered to a symbiotic relationship and finally to the pure competition relationship. We also perform an equilibrium analysis of the estimated Lotka-Volterra equations and, as a result, it is found that there is a market index equilibrium point that would be stable in the latest relationship.

• Journal of Microbiology
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• 제43권5호
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• pp.443-450
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• 2005

The multi-host pathogen, Pseudomonas aeruginosa, possesses an extraordinary versatility which makes it capable of surviving the adverse conditions provided by environmental, host, and, presumably, competing microbial factors in its natural habitats. Here, we investigated the P. aeruginosa-Bacillus subtilis interaction in laboratory conditions and found that some P. aeruginosa strains can outcompete B. subtilis in mixed planktonic cultures. This is accompanied by the loss of B. subtilis viability. The bactericidal activity of P. aeruginosa is measured on B. subtilis plate cultures. The bactericidal activity is attenuated in pqsA, mvfR, lasR, pilB, gacA, dsbA, rpoS, and phnAB mutants. These results suggest that P. aeruginosa utilizes a subset of conserved virulence pathways in order to survive the conditions provided by its bacterial neighbors.

• 대순사상논총
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• 제17권
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• pp.227-237
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• 2004

The concrete, practical orientation of the Chinese toward the aim of communal harmony conditioned their approach toward philosophical differences. Ideological conflicts were seen, not only by the politicians but by the intellectuals themselves, to threaten societal well-being. Harmonious interaction was finally more important to these thinkers than abstract issues of who had arrived at the 'truth'. Perhaps the most obvious illustation of the way the Chinese handled their theoretical conflicts is to be found in mutual accommodation of the three emergent traditions of Chinese culture, Confucianism, Taoism and Buddhism. Beginning in the Han dynasty(206 BC-AD 200), the diverse themes inherited from the competing 'hundred schools' of pre-imperial China were harmonized within Confucianism as it ascended to become the state ideology. The harmony among confucianism, Buddhism and Taoism, traditional philosophical trend in China, is very important research subject at contemporary circumstance. For its cultual influences to surrounding nations, such as Korea, japan and Vietnam etc., are so crucial.

• 한국과학교육학회지
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• 제34권3호
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• pp.221-233
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• 2014

이 연구에서는 중학교 1학년 32명을 대상으로 과학 협동학습 과정에서 학생들 사이의 언어적 상호작용을 개별 진술, 상호작용 단위 및 갈등행동 단위 수준에서 분석하고, 집단주의 성향에 따른 이질 집단과 동질 집단에서의 언어적 상호작용을 비교하였다. 또한, 학업 성취도 및 학업 성취도의 향상과 언어적 상호작용 사이의 관계를 조사하였다. 개별 진술 수준의 분석 결과, 과제 관련 진술의 하위 영역의 분포는 이질 집단과 동질 집단에서 비슷한 것으로 나타났고, 두 집단 모두 설명하기의 빈도가 가장 높았다. 상호작용 단위의 유발 빈도는 이질집단보다 동질 집단에서 높게 나타났고, 대칭적 상호작용의 유발 빈도가 가장 높았다. 이질 집단에서 HC 학생의 개별 진술의 빈도 및 상호작용 단위의 유발 빈도가 LC 학생보다 높게 나타났다. 갈등행동 단위의 유발 빈도는 전체적으로 낮은 편이었으나 집단별로 비율이 비슷했다. 특히, LC 동질 집단에서는 회피와 경쟁, HC 동질 집단에서는 협력의 유발 빈도가 높았다. 또한, 상호작용 단위 및 갈등행동 단위 수준에서 이질 집단과 동질 집단 간의 질적인 차이가 있었다. 학업 성취도 및 학업 성취도의 향상은 과제관련 진술의 합계와 유의미한 상관을 나타냈다.

• Bulletin of the Korean Chemical Society
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• 제25권1호
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• pp.97-100
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• 2004

Tetragonal $K_2NiF_4$-type $La_{2-2x}Sr_{2x}Cu_{1-x}Fe_xO_{4-y}$ solid-solution have been synthesized by citrate based sol-gel method. The valence state of iron was determined by Mossbauer spectroscopy and subsequent iodometric titration clearly showed that the copper ions in this solid-solution are in the mixed valence state Cu(II/III). When x ${\geq}$ 0.3, Fe(III) is competing with the mixture of Cu(II) and Cu(III) and $La_{2-2x}Sr_{2x}Cu_{1-x}Fe_xO_{4-y}$ exhibits a metallic character. No evidence for Cu(II)-O-Fe(IV) ${\leftrightarrow}$ Cu(III)-O-Fe(III) valence degeneracy was observed. In contrast, a small amount of Fe(IV) is observed with increasing x (x = 0.4 and 0.5), revealing a semiconducting behavior. These results suggest that the electronic interaction of Cu(III)-O-Fe(III) contributes greatly to the metallic character, while the electronic interaction of Cu(II)-O-Fe(IV) deteriorates the metallic character of $La_{2-2x}Sr_{2x}Cu_{1-x}Fe_xO_{4-y}$.

• 패션비즈니스
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• 제27권1호
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• pp.126-139
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• 2023

The purpose of this study was to investigate and verify interaction effects of collaboration and brand origin as well as fashion involvement on consumer attitudes towards global sports apparel brands and Chinese local sports apparel brands targeting Chinese consumers. A survey was conducted on 425 Chinese women aged 19 to 34 years. Data were subjected to frequency analysis, reliability analysis, t-tests, 3-way ANOVA, and simple effect analysis. Results of the study are as follows. First, fashion involvement, collaboration, and brand country of origin all had a significant effect on consumer preference of Chinese consumers when purchasing sportswear. Second, fashion involvement and collaboration in purchasing sportswear had a significant interaction effect on consumer preference. Finally, collaboration, brand origin, and fashion involvement showed significant three-way interaction effects on Chinese consumers' preferences. Results of this study can help establish an efficient marketing strategy for Chinese local sportswear brands, which are fiercely competing with global sportswear brands in the Chinese market because they can examine Chinese consumers' attitudes toward sportswear brands. To accurately compare global and local sportswear brands, it must be assumed that there are no differences in brand preferences among consumers. However, as this study selected each brand as the research brand ranked as the top preference, this aspect was not taken into consideration. Therefore, in future research, it is necessary to consider differences in brand preferences and conduct the study accordingly.

• Child Health Nursing Research
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• 제24권4호
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• pp.420-433
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• 2018

Purpose: This study was conducted to explore experiences of the development of parent-child relations among Korean college students. Methods: The participants were 18 Korean college students. Data were collected through in-depth interviews, and the main question was, "Could you tell me about how your relationship with your parents has developed?". Data were analyzed using Strauss and Corbin's grounded theory methodology. Results: The central phenomena of the experiences of parent-child relations among Korean college students were 'new realizations about parent-child relations' and 'competing against parents'. The major action/interaction strategies were 'having an equal status to one's parents' and 'keeping parents at a distance'. Consequences included 'going beyond the bounds of parental guidance'. Conclusion: These findings indicate that students tried to give back to their parents, and also endeavored to stand apart from their parents in order to obtain independence. Their efforts were influenced by their parents' efforts to be tolerant towards their children. The findings emphasize that Korean college students experienced the process of building new, interdependent relations with their parents.