• 한국생물공학회:학술대회논문집
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• 2004.07a
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• pp.107-125
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• 2004

A bioremediation of petroleum-contaminated soil in Korea was evaluated for the optimization of enhanced biodegradation and the minimization of effects of seasonal variations, The short-term bioremediation in combination of biopile pretreatment and landfarming was performed by lowering contaminated levels and overcoming the inhibiting factors in the rainy and winter seasons. A microbial density was maintained with indigenous microbial addition for bioaugmentation and with fertilizers for biostimulation. A lesser volatile and biodegradable fraction due to their abiotic removals following the biopile pretreatment was effectively removed by the laterally applied landfarming. The optimal temperature in greenhouse was maintained by buffering of the soil temperature even with slight decreases in removal rates during the winter and extensive leaching of nutrients and contaminants was restricted with adjusting the water contents during the Korean rainy season. Although the tilling process was effective for biodegradation with aeration only, the simultaneous treatment due to apparent mixing of nutrients and microbes more favorably degraded the petroleum than the sequential treatment.

• Journal of the Korean Society of Food Science and Nutrition
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• v.19 no.4
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• pp.342-348
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• 1990

Effects of various monosodium glutamate(MSG_ concentration (0-400mg%) on the quality of Korean cabbage kimchi during fermentation at 2$0^{\circ}C$ were investigated. The growth of lactic acid bacteria titratable acidity pH content of thiamine ascorbic acid $\beta$-carotene and sensory evaluation were observed in the presencve of MSG. Titratable acidity was increased in the kimchi contained MSG during the fermentation.l Wheeas the changes of pH in the kimchi contained MSG were similar to those in control, Maximum growth of lactic acid bacteria was observed after 49 hour of fermentation in kimchi contained with 200mg MSG. The might be due to the fact that MSG was given optimum pH for acid bacteria growth because of its buffering action. Therefore the periods of kimchi fermentation were reduced by addition of MSG, MSG also affected on the stability of ascorbic acid thiamine and $\beta$-carotene. According of MSG. MSG also affected on the stability of ascorbic acid thiamine and $\beta$-carotene. According to sensory evaluation MSG reduced sour taste in kimchi which increased edible periods.

• Fashion & Textile Research Journal
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• v.7 no.1
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• pp.41-48
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• 2005

The purpose of this study was to investigate social support buffering stress symptoms and the relationship between stress symptoms and job performance. The data were obtained from questionnaires completed by 529 workers employed in textile or clothing companies. The SPSS package was used for data analysis which included t-test, ANOVA, and correlation analysis. The results showed there were significant differences in the perceived levels of social support according to individual differences such as gender, marital status, length of service, title of current position, and division of responsibility. Workers with a high level of supervisor or co-worker social support were found to have the lower levels of stress symptoms. Social support appeared to moderate the relationship between stress symptoms and job performance.

• Molecules and Cells
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• v.41 no.12
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• pp.1000-1007
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• 2018

Mitochondria and endoplasmic reticulum (ER) are essential organelles in eukaryotic cells, which play key roles in various biological pathways. Mitochondria are responsible for ATP production, maintenance of $Ca^{2+}$ homeostasis and regulation of apoptosis, while ER is involved in protein folding, lipid metabolism as well as $Ca^{2+}$ homeostasis. These organelles have their own functions, but they also communicate via mitochondrial-associated ER membrane (MAM) to provide another level of regulations in energy production, lipid process, $Ca^{2+}$ buffering, and apoptosis. Hence, defects in MAM alter cell survival and death. Here, we review components forming the molecular junctions of MAM and how MAM regulates cellular functions. Furthermore, we discuss the effects of impaired ER-mitochondrial communication in various neurodegenerative diseases.

• Korean Journal of Child Studies
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• v.38 no.1
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• pp.33-48
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• 2017

Objective: The purpose of this study was to investigate the mediating effects of emotional regulation abilities on the relationship between parenting behavior and preschoolers' externalizing behavior problems. Methods: A survey was conducted with the parents of 166 preschoolers; the children were attending seven different daycare centers in Seoul. Results: The results were as follows: First, emotional regulation abilities fully mediated the relationship between fathers' rejection-restriction parenting behavior and externalizing behavior problems. Second, emotional regulation abilities fully mediated the relationship between mothers' warmth-acceptance, rejection-restriction, and permissive-neglectful parenting behavior and externalizing behavior problems. Third, after controlling for fathers' parenting behavior, emotional regulation abilities fully mediated the relationship between mothers' parenting behavior and externalizing behavior problems. Conclusion: Both parenting behavior and emotional regulation abilities should be considered when attempting to understand the development of preschoolers' externalizing behavior problems. In particular, the results from this study stress the important role of emotional regulation abilities in decreasing externalizing behavior problems and buffering against the influence of negative parenting behavior.

• Safety and Health at Work
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• v.7 no.4
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• pp.354-362
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• 2016

Background: The present study aims at investigating whether and how (1) job demands and job resources are associated with work-to-private-life interference (WLI) and (2) job resources moderate the relationship between job demands and WLI. Methods: Data were collected by a self-report questionnaire from three hospitals in Italy. The sample consisted of 889 health-care workers. Results: All job demands (i.e., quantitative demands, disproportionate patient expectations, and verbal aggression) and job resources (i.e., job autonomy, support from superiors and colleagues, fairness, and organizational support), with the exception of skill discretion, were related to WLI. The effects of quantitative demands on WLI were moderated by support from superiors; fairness and organizational support moderate the effects of all job demands considered. Support from colleagues moderated only verbal aggression. Job autonomy did not buffer any job demands. Conclusion: The present study suggests that the work context has a central importance in relation to the experience of WLI among health-care workers. The results indicated that intervention in the work context may help to contain WLI. Such interventions would especially be aimed at improving the social climate within the unit and quality of the organizational process.

• Journal of the Korean Home Economics Association
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• v.40 no.3
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• pp.55-66
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• 2002

This purposes of study are to examine the effect of family related stress and social support on the ways of coping of adolescents and provide a ground necessary to improve it. A survey was conducted on 756 adolescents who were living in Naju. Collected data were analyzed by descriptive statistics, Pearson's correlation, and multiple regression analysis. This study utilized two different models, direct effect model and buffering effect of social support in order to examine the effects of social support on the ways of coping of adolescents. Research findings suggest that the level of coping appeared to be low in general among adolescents. The finding of direct effect model of social support was that mother's support, father's support, sibling's support, lather's grade, mother's grade, and economic level effected the ways of coping of adolescents. But it was not empirically supported that the social support buffered the family related stress on the ways of coping. In other words, the effects of family related stress factor didn't decrease with the increase in the level of social support, however the level of coping increased at a mercy of the age and economic level. Finally, this paper attempted to provide some alternatives to effectively improve the ways of coping among adolescents based on empirical findings.

• Korea Journal of Hospital Management
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• v.11 no.2
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• pp.32-60
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• 2006

Based on the Job Demand-Control model which was proposed by R. A. Karasek, this study was designed to investigate the relationships among job demand, job control, and job burnout of nurses. In addition, the other aim of the present study was to test the moderating or buffering role of social supports in the relationship between the job demand and job burnout. The analysis based on data collected from 239 nurses who are working in two general hospitals has produced the following results. We found that job demand was primarily related to the exhaustion component of burnout, whereas (lack of) job control was related to the disengagement dimension of burnout. And social supports from the supervisor attenuated the disengagement, whereas social supports from the colleague diminished the exhaustion. But, we found no interaction effects that were expected in the hypotheses. Specifically, social supports didn't buffer the negative effects of job demand on burnout, while job control had the moderating effect which was in opposite direction. The implications of these analyses and limitations of the study were then discussed.

• The Journal of the Korea Contents Association
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• v.15 no.4
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• pp.208-219
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• 2015

Using 492 older people in Chuncheon, this study examines whether social support is associated with depression of older people. Findings show that stress is positively associated with depression. Social support is negatively related to depression of older people. Analysis on the sources of social support reveals that all of the supports from families, friends, and important others are negatively associated with depression of the elderly. However, buffering effects of social support is not confirmed. Depression of older people is also associated with gender, household type, economic activity participation, and chronic diseases. Based on the findings, this study provides suggestions to prevent depression of older people and future research agenda.

• Nutrition Research and Practice
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• v.5 no.1
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• pp.80-87
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• 2011

The objectives of the study were to investigate job burnout and leader-member exchange (LMX) levels as well as to evaluate buffering effects of LMX on burnout among dietitians and chefs at institutional foodservices. Hypotheses were proposed based on the Job Demands-Resources model and LMX theory. The study population consisted of dietitians and chefs who were in charge of managing unit operations in a nationwide contract management company. Positive/negative affectivity, workload, job burnout, and LMX scales that bad been validated in previous research were adopted A total of 552 questionnaires were distributed and 154 responses were returned. Results indicated that respondents' burnout levels were moderate and emotional exhaustion was greater than cynicism. In terms of LMX, the surveyed dietitians and chefs showed higher respect toward their supervisors than loyalty. When positive affectivity and negative affectivity were controlled, workload influenced emotional exhaustion and professional efficacy significantly. With affectivity and workload controlled, however, LMX did not influence any dimensions of burnout. The moderating effect of LMX on the relationship between workload and cynicism was significant. That is, the effect of workload on cynicism was weak if the dietitians and chefs perceived the relationship with their supervisor positively. Based on the findings and literature reviewed, how to mitigate job burnout among foodservice managers is discussed.