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YuKyeong Cho,Min-Ji Kim,Sung-Koo Kim 한국생물공학회 2013 KSBB Journal Vol.28 No.6
Ethanol productions were performed by separate hydrolysis and fermentation (SHF) and simultaneous saccharification and fermentation (SSF) processes using seaweed, Enteromorpha intestinalis (sea lettuce). Pretreatment conditions were optimized by the performing thermal acid hydrolysis and enzymatic hydrolysis for the increase of ethanol yield. The pretreatment by thermal acid hydrolysis was carried out with different sulfuric acid concentrations in the range of 25 mM to 75 mM H₂SO₄, pretreatment time from 30 to 90 minutes and solid contents of seaweed powder in the range of 10~ 16% (w/v). Optimal pretreatment conditions were determined as 75 mM H₂SO₄ and 13% (w/v) slurry at 121℃ for 60 min. For the further saccharification, enzymatic hydrolysis was performed by the addition of commercial enzymes, Celluclast 1.5 L and Viscozyme L, after the neutralization. A maximum reducing sugar concentration of 40.4 g/L was obtained with 73% of theoretical yield from total carbohydrate. The ethanol concentration of 8.6 g/L of SHF process and 7.6 g/L of SSF process were obtained by the yeast, Saccharomyces cerevisiae KCTC 1126, with the inoculation cell density of 0.2 g dcw/L.
Cho, YuKyeong,Kim, Min-Ji,Kim, Sung-Koo The Korean Society for Biotechnology and Bioengine 2013 KSBB Journal Vol.16 No.5
Ethanol productions were performed by separate hydrolysis and fermentation (SHF) and simultaneous saccharification and fermentation (SSF) processes using seaweed, Enteromorpha intestinalis (sea lettuce). Pretreatment conditions were optimized by the performing thermal acid hydrolysis and enzymatic hydrolysis for the increase of ethanol yield. The pretreatment by thermal acid hydrolysis was carried out with different sulfuric acid concentrations in the range of 25 mM to 75 mM $H_2SO_4$, pretreatment time from 30 to 90 minutes and solid contents of seaweed powder in the range of 10~16% (w/v). Optimal pretreatment conditions were determined as 75 mM $H_2SO_4$ and 13% (w/v) slurry at $121^{\circ}C$ for 60 min. For the further saccharification, enzymatic hydrolysis was performed by the addition of commercial enzymes, Celluclast 1.5 L and Viscozyme L, after the neutralization. A maximum reducing sugar concentration of 40.4 g/L was obtained with 73% of theoretical yield from total carbohydrate. The ethanol concentration of 8.6 g/L of SHF process and 7.6 g/L of SSF process were obtained by the yeast, Saccharomyces cerevisiae KCTC 1126, with the inoculation cell density of 0.2 g dcw/L.
대학생이 지각하는 부모양육방식 유형에 따른 삶의 목표 유형과 삶의 만족도의 관계
조유경(Cho, Yukyeong),오인수(Oh, Insoo) 학습자중심교과교육학회 2019 학습자중심교과교육연구 Vol.19 No.11
본 연구는 대학생이 지각하는 부모양육방식의 유형을 탐색하고 유형에 따른 대학생들의 삶의 목표 유형과 삶의 만족도에 어떠한 차이점이 있는지 알아보고자 하였다. 또한 대학생이 인식한 부모양육방식의 유형과 이들의 삶의 목표 유형이 삶의 만 족도에 미치는 영향력에 대해서도 확인해보고자 하였다. 이를 위해 한국청소년정책 연구원이 2010년부터 2016년까지 7년 동안 추적 조사한 종단연구인 한국아동·청소년패널자료 가운데 중1패널 7차년도 데이터를 사용하였다. 연구결과를 정리하면 첫 째, 군집분석으로 통해 확인된 부모양육방식의 유형은 3가지로 애정친밀 집단, 과관여 집단, 방임적 집단으로 확인되었다. 둘째, 부모양육방식에 따른 대학생의 삶의 목표 유형에 있어서 내재적 삶의 목표의 경우에는 애정친밀 집단이 과관여 집단과 방임적 집단보다 높게 나타났다. 반면, 외재적 삶의 목표는 과관여 집단이 방임적 집단보다 높게 나타났다. 셋째, 부모양육방식에 따른 대학생의 삶의 만족도는 세 집단 별로 유의미한 차이가 확인되었고 애정친밀 집단, 과관여 집단, 방임적 집단 순으로 나타났다. 마지막으로 부모양육방식의 유형 중 애정친밀 집단에 속하는 것이 대학생의 삶의 만족도 향상에 가장 높은 영향력을 미쳤으며 외재적 삶의 목표는 삶의 만족도에 부정적으로, 내재적 삶의 목표는 삶의 만족도에 긍정적인 영향을 미치는 것으로 확인되었다. 결과를 종합하여 대학생들을 위한 상담적 시사점과 부모교육을 위한 교육적 함의들이 논의되었다. This study explored the perceived types of parenting style by college students and tried to find out the changes of life goal types and life satisfactions level depending on types of parenting style. We also investigated the individual effects of perceived types of parenting style and life goal types on the life satisfaction level. The panel data of 1,881 college students from the Korea Child and Youth Panel Survey (KCYPS) of 2016 were used in this study. The major results were as follows. First, the cluster analysis identified 3 types of parenting styles of affectionate intimate group, excessive involved group, uninvolved group. Secondly, the life goals of excessive involved group showed more of extrinsic than those of uninvolved group by types of parenting style. However, affectionate intimate group showed more of intrinsic than those of excessive involved group or uninvolved group. Thirdly, life satisfaction levels depending on the types of parenting style were significantly differ by groups and showed in order of affectionate intimate group, excessive involved group. uninvolved group. Lastly, being affectionate intimate group most highly enhances the life satisfaction level, and the negative effects of extrinsic goal while the positive ones of intrinsic goal on the life satisfaction were identified. With all the results, counseling implications for college students and educational implications for parent education were discussed in this study