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Lee Keum-Sil,Shin Hyun-Ah,Cho Hwang-Yoon,Kim Eun-Young,Lee Young-Jae,Wang Kyu-Chang,Kim Yong-Sik,Lee Hoon-Taek,Chung Kil-Saeng 한국발생생물학회 2003 한국발생생물학회 학술발표대회 Vol.2003 No.1
Embryonic stem (ES) cells proliferate extensively in the undifferentiated state and have the potential to differentiate into a variety of cell types in response to various environmental cues. The generation of functional dopaminergic neurons from ES cells is promising for cell replacement therapy to treat Parkinson's disease. We compared the in vitro differentiation potential of pluripotent human embryonic stem (hES, MB03) cells induced with basic fibroblast growth factor (bFGF) or retinoic acid (RA). Both types of treatment resulted in similar neural cell differentiation patterns at the terminal differentiation stage, specifically, 75% neurons and 11% glial cells. Additionally, treatment of hES cells with brain derived neurotrophic factor (BDNF) or transforming growth factor (TGF)- during the terminal differentiation stage led to significantly increased tyrosine hydroxylase (TH) expression, compared to control (P<0.05). In contrast, no effect was observed on the rate of mature or glutamic acid decarboxylase-positive neurons. Immunostaining and HPLC analyses revealed the higher levels of TH (20.3%) and dopamine in bFGF and TGF- treated hES cells than in RA or BDNF treated hES cells. The results indicate that TGF- may be successfully used in the bFGF induction protocol to yield higher numbers of functional dopaminergic neurons from hES cells.
Time Use Analysis of Married Paid Workers by Employment Types
Lee, Hyun-Ah,Cho, Hee-Keum,Lee, Seung-Mie,Han, Young-Sun Korea Distribution Science Association 2016 Asian Journal of Business Environment (AJBE) Vol.6 No.2
Purpose - This study aims to analyze time use of employees to see how they make a balance between work and family. We tried to analyze time use and time pressure of married paid workers in order to understand their work and family balance. Methodology - Time use was compared by employment types and time pressure groups. We analyzed the factors influencing time pressure, dividing two employment types. The data were selected from the 2009 Korean Time Use Survey. Results - Those who feel time pressure among full-timers spent more time on work and housework and less time on personal care and leisure than those who do not feel time pressure. Logit analysis on time pressure showed that full-timers feel more time pressure than part-timers do. Gender, age, education, income, day-off type, and the presence of preschool children were significant variables on time pressure. Conclusion - These results imply that time use and time pressure for married paid workers are affected by employment types. Flexibility of labor needs to enhance work and family balance for females who have preschool children.
Time Use Analysis of Married Paid Workers by Employment Types
Hyun-Ah Lee,Hee-Keum Cho,Seung-Mie Lee,Young-Sun Han 한국유통과학회 2016 Asian Journal of Business Environment (AJBE) Vol.6 No.2
Purpose – This study aims to analyze time use of employees to see how they make a balance between work and family. We tried to analyze time use and time pressure of married paid workers in order to understand their work and family balance. Methodology – Time use was compared by employment types and time pressure groups. We analyzed the factors influencing time pressure, dividing two employment types. The data were selected from the 2009 Korean Time Use Survey. Results – Those who feel time pressure among full-timers spent more time on work and housework and less time on personal care and leisure than those who do not feel time pressure. Logit analysis on time pressure showed that full-timers feel more time pressure than part-timers do. Gender, age, education, income, day-off type, and the presence of preschool children were significant variables on time pressure. Conclusion – These results imply that time use and time pressure for married paid workers are affected by employment types. Flexibility of labor needs to enhance work and family balance for females who have preschool children.
Time Use Analysis of Married Paid Workers by Employment Types
Hyun Ah Lee,Hee Keum Cho,Seung Mie Lee,Young Sun Han 한국유통과학회 2017 KODISA ICBE (International Conference on Business Vol.2017 No.-
Purpose- As balance between work and family becomes an important factor in measuring one's quality of life, companies need to understand employees'demand for work-family balance in terms of human resource management. We tried to analyze time use of employees to see how they make a balance between work and family. The difficulties of work and family balance are shown objectively by the actual conditions of time use and subjectively by time pressure. Therefore, this research aims to analyze the time use and time pressure of married paid workers in order to understand their conditions of work and family balance. Methodology- This study analyzed the time use and time pressure of married paid workers by employment types. Time use was compared by employment types and time pressure groups. We analyzed the factors influencing time pressure, dividing the two employment type groups (full-timer v part-timer). The data were selected from the '2009 Korean Time Use Survey' by the Korean National Statistical Office. The subjects selected were 4918respondents who are married paid workers. Results- There were big differences in time use between full-time and part-time married workers. A comparison of time use between time pressure groups within the full-time workers showed that those who feel time pressure spent more time on work and housework and less time on personal care and leisure than did those who do not feel time pressure. On the other hand, those who feel time pressure among part-time workers spent more time on family care and less time on personal care. Full-time workers reported to have difficulties in work-life balance. Logit analysis on time pressure showed that full-time workers feel more time pressure than part-time workers do. On weekdays, gender, age, education, income, day-off type, and the presence of preschool children were significant variables on time pressure. In particular, females perceived greater time pressure than males did, and those who have preschool