• Korean Journal of Child Studies
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• v.38 no.2
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• pp.119-132
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• 2017

Objective: This study aimed to examine the longitudinal relations of children's temperamental attributes (i.e., emotionality, activity, and sociability) and maternal responsiveness to overall and specific externalizing/internalizing behavior problems during the preschool period. Methods: Data (N=1,438) from the 4th and 6th wave of Panel Study on Korean Children (PSKC) were used in a series of hierarchical regression analyses. The analyses were conducted to determine the additive and interactive effects of maternal responsiveness and temperamental attributes of children at the age of 3 years on the broadband and narrowband scales of their behavior problems at the age of 5 years. Results: Overall, results confirmed the additive and interactive effects of maternal responsiveness and temperamental attributes on the levels of different domains of behavior problems. Examination of the interactive effects showed that maternal responsiveness was more strongly related to some behavior problems for temperamentally vulnerable children as compared to children with less temperamental vulnerabilities. Conclusion: The findings suggested that the beneficial effects of positive parenting on the development of behavior problems might be more pronounced for temperamentally vulnerable than for less vulnerable children.

• Journal of Korean Society on Water Environment
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• v.30 no.4
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• pp.403-408
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• 2014

The toxicity of heavy metals (Zn, Pb) and diesel, in single and binary solution was investigated using the photobacterium Vibrio fischeri (Microtox test) as a test organism. In this experiment, the concentration of water soluble fraction of diesel was based on the total petroleum hydrocarbon (TPH). The toxicity of each single compound showed the following $EC_{50}$ (15min): Zn 1.90 mg/L, Pb 0.31 mg/L, TPH 2.09 mg/L. The observed toxicity of binary mixtures increased, depending on the concentration of the mixed substance. The effects were defined as synergistic, antagonistic, or additive, in accordance with the sign of difference between the predicted and observed toxicity at binary mixtures. The interactive effects between zinc and lead were synergistic, on the other hand, antagonistic and additive effects were found in each metal and TPH mixtures on the bioluminescence of V. fischeri.

• Proceedings of the Korean Magnestics Society Conference
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• 2003.12a
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• pp.292-292
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• 2003

• Proceedings of the KWS Conference
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• v.43
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• pp.28-30
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• 2004

• Proceedings of the Korean Ceranic Society Conference
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• 2003.04a
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• pp.183.2-183
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• 2003

• Proceedings of the Korean Magnestics Society Conference
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• 1991.11a
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• pp.76-77
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• 1991

• 한국전기화학회:학술대회논문집
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• 2004.10a
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• pp.17-17
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• 2004

• Proceedings of the Materials Research Society of Korea Conference
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• 1998.08a
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• pp.48.4-48
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• 1998

• Proceedings of the Materials Research Society of Korea Conference
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• 1998.11a
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• pp.50-50
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• 1998

• Asian-Australasian Journal of Animal Sciences
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• v.33 no.8
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• pp.1217-1223
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• 2020

Objective: Eggshells with a uniform color and intensity are important for egg production because many consumers assess the quality of an egg according to the shell color. In the present study, we evaluated the influence of dominant effects on the variations in eggshell color after 32 weeks in a crossbred population. Methods: This study was conducted using 7,878 eggshell records from 2,626 hens. Heritability was estimated using a univariate animal model, which included inbreeding coefficients as a fixed effect and animal additive genetic, dominant genetic, and residuals as random effects. Genetic correlations were obtained using a bivariate animal model. The optimal diagnostic criteria identified in this study were: L^🟉 value (lightness) using a dominance model, and a^🟉 (redness), and b^🟉 (yellowness) value using an additive model. Results: The estimated heritabilities were 0.65 for shell lightness, 0.42 for redness, and 0.60 for yellowness. The dominance heritability was 0.23 for lightness. The estimated genetic correlations were 0.61 between lightness and redness, -0.84 between lightness and yellowness, and -0.39 between redness and yellowness. Conclusion: These results indicate that dominant genetic effects could help to explain the phenotypic variance in eggshell color, especially based on data from blue-shelled chickens. Considering the dominant genetic variation identified for shell color, this variation should be employed to produce blue eggs for commercial purposes using a planned mating system.