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논문 : 습식제련 ; 수용액에서 염화은의 구리흡착거동에 관한 연구
안태항 ( Tae Hang Ahn ),김진현 ( Jin Hyeon Kim ),이원해 ( Won Hae Lee ) 대한금속재료학회 ( 구 대한금속학회 ) 1996 대한금속·재료학회지 Vol.34 No.11
For the purpose of establishing basic data to purify silver, the adsorption behavior of Cu(II) ion on AgCl in aqueous solution was studied in the presence of chloride ion. The results obtained were as follows : 1. The adsorption of Cu(II) ion on AgCl increases with increasing the concentration of NaCl, and it is reasonable to assume that CuCl- is supposed to be adsorbed. And Langmuir adsorption isotherm, when applied to the isotherm data, was obeyed. 2. The adsorption of Cu(II) ion on AgCl with HCI is about half as much as that with NaCl. 3. In the presence of Ag- ion of higher concentration, the adsorption of Cu(II) ion on AgCl is similar to that which has been shown to be adsorbed with HCl. 4. The adsorption of Cu(II) ion on AgCl decreases with increasing the temperature, and the enthalpy of adsorption is -8.0kJ/mol.
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이종건(Jong Keon Lee),김현철(Hyeon Cheol Kim),안태항(Tae Hang Ahn) 한국경영학회 2014 經營學硏究 Vol.43 No.2
Entrepreneurial orientation and entrepreneurial experience are useful as explanatory variables in explaining the effects of self-efficacy on firm performance. According to the upper echelon theory, CEO plays a critical role in shaping and positioning the organization strategically to achieve performance, using their personal traits of individuals to influence organizational dynamics(Carmeli, 2008). Although previous research has suggested that self-efficacy had a positive effect on firm performance(Drnovsek & Glas, 2002; Hmielesky & Baron, 2008; Westerberg, Singh, & Hackner, 1997), there is limitation in explaining how self-efficacy influences firm performance. Attention has been turned to entrepreneurial orientation (EO) in explaining entrepreneurial performance (Moruku, 2013). Entrepreneurial experience has been suggestedas an useful explanatory variable to account for firm performance (Lee & Tsang, 2001; Schiller& Crewson, 1997). Little attention has been turned to the role of entrepreneurial experience in the entrepreneurial orientation-firm performance relationship. The present study, therefore, developed the new research model that includes entrepreneurial orientation and entrepreneurial experience, extending the current model that includes the effect of self-efficacy on firm performance. This study examined relationships among self-efficacy, entrepreneurial orientation, entrepreneurial experience, and firm performance. Data were collected from 146 entrepreneurs in Korea. We used path analysis and regression analysis to test the direct and indirect effects of self-efficacy on perceptual measures of firm performance, as well as how firm performance might be moderated by entrepreneurial experience. Entrepreneurial orientation was used as the mediating variable for explaining the relationship between self-efficacy and firm performance. Entrepreneurial experience was used as the moderating variable for explaining the relationship between entrepreneurial orientation firm performance. Results indicated that self-efficacy and entrepreneurial orientation were positively related to firm performance. Self-efficacy also influenced firm performance positively through its effect on entrepreneurial orientation. Especially, entrepreneurial experience strengthened the positive relationship between entrepreneurial orientation and firm performance. The authors discuss both the study``s implications and future research directions.
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