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이주연,박은주,Lee, Ju Yeon,Park, Eun Ju Korean Chemical Society 2001 Bulletin of the Korean Chemical Society Vol.22 No.7
1-(2'2'3'-Tricyano-3-carbomethoxycyclopropyl)-34-di-(2'-hydroxyethoxy)benzene, (4) was prepared by the reaction of bromomalononitrile with methyl 3,4-di-(2'-hydroxyethoxy)benzylidenecyanoacetate (3). Diol 4 was condensed with tolylene-2,4-diisocyanate, 3,3'-dimethoxy-4,4'-biphenylenediisocyanate, and 1,6-hexamethylenediisocyanate to yield polyurethanes 5, 6, and 7 containing tricyanocyclopropane functionalities in the pendant group. The resulting polymers 5-7 were soluble in common organic solvents and the inherent viscosities were in the range of 0.25-0.30 dL/g. Polyurethanes 5-7 showed a thermal stability up to 300 $^{\circ}C$ in TGA thermograms. Solution-cast films showed Tg values in the range of 100-125 $^{\circ}C$ and piezoelectric coeffcients (d31) of the poled polymer films were 1.3-2.0 pC/N, which are acceptable for piezoelectric device applications.
간호대학생의 자아탄력성과 진로의식성숙이 취업스트레스에 미치는 영향
이주연,Lee, Joo-Yeon 한국디지털정책학회 2022 디지털융복합연구 Vol.20 No.4
본 연구는 간호대학생의 자아탄력성, 진로의식성숙 및 취업스트레스 간의 관계를 파악하고자 하였다. 자료수집 기간은 2021년 10월 22일부터 11월 21일까지이며, 구조화된 설문지를 이용하여 187명의 간호대학생을 대상으로 일반적 특성, 자아탄력성, 진로의식성숙 및 취업스트레스를 파악하였다. 자료분석은 IBM SPSS 21.0 프로그램을 이용하여 기술통계, t-test, ANOVA, Pearson's correlation coefficient, Multiple regression으로 분석하였다. 본 연구결과 자아탄력성은 진로의식성숙과 양의 상관관계가 있었고, 진로의식성숙은 취업스트레스와 음의 상관관계가 있었다. 취업스트레스에 영향을 미치는 변수는 진로의식성숙이었고, 취업스트레스를 43% 설명하는 것으로 나타났다. 따라서 본 연구를 통해 간호대학생이 취업스트레스를 줄이고 직업에 대한 긍정적인 진로계획을 세울 수 있도록 간호대학생의 취업역량강화 프로그램 개발과 적용이 필요하다. In this study, the relationship between ego-resiliency, career consciousness maturity, and job-seeking stress of nursing students was investigated. For this study, data were collected from October 22 to November 21, 2021. Therefore, general characteristics, job-seeking characteristics, ego-resilience, career consciousness maturity, job-seeking stress were investigated by applying a structured questionnaire targeting 187 nursing students. Descriptive statistics, t-test, ANOVA, Pearson's correlation coefficient, and Multiple regression data were analyzed using program IBM SPSS21.0. In the study results, ego-resilience had a positive correlation with career consciousness maturity, and career consciousness maturity had a negative correlation with job-seeking stress. The factor affecting job-seeking stress was the maturity of career consciousness, and the influence was 43%. Based on the research results, It is necessary to develop and apply job-seeking support programs in education so that nursing students can reduce job-seeking stress and make positive career plans.
한국 여성의 메이크업 광고에 나타난 시각적 기호의 특성
이주연,Lee, Ju-Yeon 한국패션뷰티학회 2003 한국패션뷰티학회지 Vol.1 No.1
As korean women despised to transform their appearance into totally different shape, and they regarded to enhance a inherent beauty ideal beauty, korean traditional make-up culture was natural. But in modern society, make-up has been developing as one of the beauty industry and it means make-up involves more meanings than primitive period and needs to study its multi-dimensional connotation to understand in the culture. The purposes of this study were to find out what was represented in make-up ad and how it has been changed. The data of this study were collected from make-up advertisement printed in 'Hyang Jang' which is a periodical of amole pacific cosmetic industry from 1972-2001, and qualitatively analysed. As a results of content analysis were: The characteristics of non-verbal expression in make-up advertisements were different by the time. Generally person-appeal advertisements were more than product-appeal advertisements. And in the 1970s and early 1980s, person-appeal advertisements were appeal to the lifestyle, but after that person itself was appealed. And also after early 1980s, image-appeal advertisements were increased.
트립토판 중합효소 α 소단위 잔기 치환체 Pro<sup>96</sup>→Leu의 구조 변화에 영향을 미치는 139 및 258 잔기의 치환 효과
이주연,정재갑,신혜자,임운기,Lee, Joo-Youn,Jeong, Jae-Kap,Shin, Hae-Ja,Lim, Woon-Ki 한국생명과학회 2002 생명과학회지 Vol.12 No.4
대장균 트립토판 중합효소(tryptophan synthase) $\alpha$ 소단 위체의 96번, 139번 과 258번 자리를 돌연변이 시킨 이중 돌연변이체 P96L/F139W, P6L/F258W와 삼중 돌연변이체 P96L/F139W/F258W의 효소 활성도와 형광 분광계를 이용한 분광학적 성질을 조사하였다. 이중 돌연변이체의 효소 활성도는 야생형과 유사하나 삼중 돌연변이체는 40% 감소된 활성도를 가진다. P96L/F139W 와 P96L/F258W의 형광세기는 야생형에 비해 감소하였으나 P96L/F139W/F258W는 야생형에 비해 증가하였다. 효소 활성도와 형광 결과는 96번의 치환이 8번 알파구조와 4번 베타 구조와 4번 알파구조 사이의 loop의 안정성에 영향을 준 것을 나타낸다. 이 결과로부터 P96L/F139W/F258W는 야생형과 다른 3차 구조를 가지나 139번과 258면 주위는 더 조밀한 구조를 가지고 있다는 것을 보여준다. Enzymatic activities and fluorescence spectroscopic properties of the double mutant proteins P96L/F139W, P96L/F258W and a triple mutant protein P96L/F139W/F258W of tryptophan synthase $\alpha$ subunit from Escherichia coli was examined to study tertiary and local structure changes around the tryptophan residues. The enzymatic activities of P96l./F139W and P96L/F258W were similar, but P96L/F139W/F258W had lower activity, as compared to wild type. The fluorescence intensities of double mutant, P96L/F139W and P96L/F258W, were decreased but that of a triple mutant, P96L/F139W/F258W, was increased when compared to wild type. The sum of the maximum fluorescence intensity (fluorescence intensity at the λ$_{max}$) for the double mutant proteins was not equal to the intensity seen in the triple mutant protein. The enzymatic activity and fluorescence data indicate that the replacement of Pro$^{96}$ longrightarrowLeu might affect on the stability of helix 8 and the loop located between strand 4 and helix4. The result suggests that the tertiary structure of triple mutant (P96L/F139W/F258W), being different from wild type, might have more compact residual structure at the vicinity of 139 and 258.8.