• Title/Summary/Keyword: Instrumental education

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Behavior in Solution and Mixing Ratio-Dependent Binding Modes of Carcinogenic Benzo[a]pyrene-7,8-dione to Calf Thymus DNA

  • Jin, Biao;Han, Sung Wook;Lee, Dong Jin
    • Bulletin of the Korean Chemical Society
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    • v.35 no.10
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    • pp.3015-3020
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    • 2014
  • The behavior of benzo[a]pyrene-7,8-dione (BPQ) in aqueous solution and its interaction with native DNA was investigated using conventional absorption and linear dichroism (LD) spectroscopy. The appearance of a broad absorption maximum at long wavelengths and its proportional relationship to solvent polarizability suggested that BPQ adopts a aggregated state for all solutions examined. Disappearance of this absorption band at higher temperatures in aqueous solution also supported BPQ aggregation. When associated with DNA absorption spectral properties were essentially the same as that in aqueous solution. However, two isosbestic wavelengths were found in the concentration-dependent absorption spectrum of the BPQ-DNA complex, suggesting the presence of at least two or more DNA-bound BPQ species. Both species produced $LD^r$ spectra whose magnitude in BPQ absorption region is larger or comparable to that in the DNA absorption region, suggesting that the molecular BPQ plane is near perpendicular relative to the local DNA helical axis. Therefore, BPQ molecules are aligned along the DNA stem in both DNA-aggregated BPQ species.

Cyclopolymerization of 1,1-Dipropargyl-1-silacyclohexane by Transition Metal Catalysts

  • Gal, Yeong-Soon;Lee, In-Sook;Chang, Eun-Hee;Jeong, Yun-Cheol;Kwak, Young-Woo
    • Bulletin of the Korean Chemical Society
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    • v.28 no.8
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    • pp.1305-1310
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    • 2007
  • A conjugated spirocyclic polymer was synthesized via the cyclopolymerization of 1,1-dipropargyl-1- silacyclohexane with various transition metal catalysts. The monomer, 1,1-dipropargyl-1-silacyclohexane was synthesized by Grignard reaction of 1,1-dichloro-1-silacyclohexane with propargyl magnesium bromide. This polymerization proceeded well to give the corresponding poly(1,1-dipropargyl-1-silacyclohexane). The catalytic activity of WCl6 was found to be similar with that of MoCl5. The structure of polymer having the conjugated backbone with silacyclohexane moieties was characterized by such instrumental methods as NMR (1H-, 13C-), IR, and UV-visible spectroscopies. The resulting polymers were mostly yellow or light-brown powders, depending on the catalyst systems used. This polymer was completely soluble in halogenated and aromatic hydrocarbons such as chloroform, 1,2-dichloromethane, benzene, toluene, and chlorobenzene, etc. The thermal and oxidative stabilities of polymer were also studied and discussed.

Suggestion for Measuring the Academic Skills of Graduate Students A Standard Diagnostic Assessment: Focusing on the MASUS Procedure of University of Sydney (대학원생 표준 학술능력 진단평가 도입 제안: 호즈 시드니 대학교 MASUS 사례를 중심으로)

  • Son, Sora;Ahn, Milee;Cha, Hyun-Jin
    • Proceedings of The KACE
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    • 2018.01a
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    • pp.115-118
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    • 2018
  • 본 연구는 대학원생의 연구 수행을 위한 학술적 역량 진단 및 평가를 기반으로 하여 성취 과정을 지원하는 대학원생의 표준 학술능력 진단평가 도입을 제안하고자함을 목적으로 하였다. 이를 위하여 호주 시드니 대학교의 대학생 학업능력 진단평가 모델인 MASUS(Measuring the Academic Skills of University Students A Diagnostic Assessment)를 연구대상으로 선정하고 질적연구 방법 중 도구적(instrumental) 사례연구를 선택하였다. 이에 따라, 자료 수집 단계에서 시드니대학교 학습지원센터 관계자와의 반구조화된 면대면 인터뷰 및 문헌자료를 정보원으로 하여 자료를 분석함으로써 MASUS의 특징과 시사점을 도출하였다. 이를 기반으로 학문적 소양으로서의 글쓰기 능력의 의미와 중요성을 고찰하고, 이를 통해 대학원생 학술 역량 진단평가 도입의 당위성을 부여하였다. 본 연구를 통해 향후 모든 대학원에서 범용적으로 적용할 수 있는 객관적이고 신뢰도 높은 표준 진단평가 모델을 개발하여 긍정적인 진단문화를 형성할 수 있기를 바라는 바이다.

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Factors associated with Subjective Age among Community Dwelling Older Adults (지역사회 거주 노인의 주관적 연령 관련 요인)

  • Lee, Si-Eun
    • Journal of Digital Convergence
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    • v.18 no.9
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    • pp.297-305
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    • 2020
  • The purpose of this study was to identify the factors associated with subjective age among community-dwelling older adults in South Korea. Cross-sectional analyses were performed on 8,040 older adults aged 65 years and over from the 2017 National Survey of Older Koreans. We used univariable analysis and multivariable analysis by the logistic regression test. The significant factors associated with subjective age in older adults were gender, education level, living arrangements, limitation of instrumental activities of daily living, number of chronic diseases, perceived health status, depression, and current economic activity. Based on the results of this study, nursing intervention will be needed to lower subjective age. This study may contribute to the older adults to have a healthy and successful old age.

Synthesis and Characterization of Poly(arylene-ethynylene)s with Ferrocene Unit by Reaction of 1,1'-Bis(ethynyldimethylsilyl)ferrocene and Aromatic Dihalides

  • Lee, In-Sook;Lee, Chong-Gu;Kwak, Young-Woo;Gal, Yeong-Soon
    • Bulletin of the Korean Chemical Society
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    • v.30 no.2
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    • pp.309-314
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    • 2009
  • New poly(arylene-ethynylene)s with silicon-containing ferrocene moiety in the polymer main chain were synthesized via the C-C bond forming reactions of 1,1´-bis(ethynyldimethylsilyl)ferrocene and various aromatic dihalides in high yields. The aromatic dihalides include 1,4-dibromobenzene, 4,4´-dibromobiphenyl, 9,10-dibromoanthracene, 2,5-dibromopyridine, 2,5-dibromothiophene, and 2,6-diiodo-4-nitroaniline. The polymer structures and properties were characterized by such instrumental methods as NMR $(^1H-,\;^{13}C-,\;and\;^{29}Si-)$, IR, UV-visible spectroscopies and TGA/DSC. The spectral data indicated that the present polymers have the regular alternating structure of 1,1´-bis(ethynyldimethylsilyl)ferrocenylene and arylene units. The resulting polymers were completely soluble in such organic solvents as methylene chloride, chloroform, benzene, chlorobenzene, and THF. The thermal behaviors of the resulting polymers were examined.

Characterization of Graphene Sheets Formed by the Reaction of Carbon Monoxide with Aluminum Sulfide

  • Yoon, Il-Sun;Kim, Chang-Duk;Min, Bong-Ki;Kim, Young-Ki;Kim, Bong-Soo;Jung, Woo-Sik
    • Bulletin of the Korean Chemical Society
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    • v.30 no.12
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    • pp.3045-3048
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    • 2009
  • Graphene sheets formed by the reaction of carbon monoxide (CO) with aluminum sulfide ($Al_2S_3$) at reaction temperatures ${\leq}$ 800 $^{\circ}$ were characterized by X-ray diffraction (XRD), Raman spectroscopy, and high-resolution transmission electron microscopy (HRTEM). The graphene sheets, formed as CO was reduced to gaseous carbon by the reaction with $Al_2S_3$, in the temperature range 800 - 1100 $^{circ}C$, did not exhibit their characteristic XRD peaks because of the small number of graphene layers and/or low crystallinity of graphene sheets. Raman spectra of graphene sheets showed that the intensity ratio of the D band to the G band decreased and the 2D band was shifted to higher frequencies with increasing reaction temperature, indicating that the number of graphene layers increased with increasing reaction temperature.

Political image of women presidents and the phenomenon of fashion politics -A Study on Cristina Fernández de Kirchner- (여성 대통령의 정치 이미지와 패션 폴리틱스 현상 -Cristina Fernández de Kirchner 사례 연구-)

  • Kim, Mikyung
    • Journal of Fashion Business
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    • v.19 no.5
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    • pp.17-33
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    • 2015
  • The purpose of this study was to evaluate the role of political image and the phenomenon of fashion politics on the style of women presidents, with focus on the President of Argentina, Cristina Fernandez de Kirchner. The results of the study were as follows. First, the political image of President Cristina Fernandez is identified with the second image of Eva Peron and Kirchnerismo, in terms of political issues. Second, fashion style includes the power and sexy images of glamour style that emphasizes the body line of suits and dress form. Vivid colors and black fashion reflects the Kirchner government's charisma and identity. Fernandez's iconic Rolex watches, expensive jewelry, and luxury accessories such as brooches that replicate Eva Peron's brooch were instrumental in forming a second image of Eva Peron. Third, the phenomenon of fashion politics appeared to equate the phenomenon of recreating the image of Eva Peron with displays of power and wealth for the successor to Kirchnerismo.

Do Long Term Savings Motives Foster Household Participation and Contribution to Savings Mechanisms in Rural Vietnam?

  • HA, Van Dung
    • The Journal of Asian Finance, Economics and Business
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    • v.6 no.2
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    • pp.75-82
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    • 2019
  • The paper aims to investigate the impacts of long-term savings motives on fostering household participation and contribution to savings mechanisms in rural Vietnam. The paper is organized in five parts: introduction, data description, methodology, empirical results, and conclusion. The quantitative methodology is employed and three simultaneous estimation methods, including instrumental variable model, two-step model, and Heckman model are used to test these impacts as well as the robustness of results. In each model, the paper examines the impacts of independent factors on both household participation and household contribution to savings mechanisms. Two sets of independent variables: long-term savings motives (profit-making investment, accumulation for big expenditure, providing for old age, and cost of educations) and control variables (dependency rate, number of people in household, and household wealth) are in each model. A set of dataset of 2,314 households for analysis is obtained from household survey in rural Vietnam. Robust statistical findings indicate that profit-making investment emerged to be the strongest motive fostering household participation to savings mechanisms while other long-term savings motives have little or no impact on fostering household participation to savings mechanisms. In addition, education investment encourages household contribution to savings mechanisms in rural Vietnam.

Reliability and Validity of Korean-Version of Information Needs in Cardiac Rehabilitation Scale

  • Choi, Sang Young Heon;Kim, Joong Hwi
    • The Journal of Korean Physical Therapy
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    • v.34 no.5
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    • pp.234-241
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    • 2022
  • Purpose: The Cardiac Rehabilitation scale (INCR scale) is a verified measure worldwide. The scale measures the extent to which cardiac rehabilitation meets the various needs of the participating patients and determines how education related to heart disease and rehabilitation satisfies their preferences. The current study applied the INCR scale to verify and develop it for use in Korea by conforming to Korean culture and language. Methods: The Korean version of the INCR scale was created after a six-step process in accordance with the international questionnaire translation law. The Korean version of the INCR scale was assessed in 45 cardiac rehabilitation patients (29 males, 16 females). Internal consistency was verified using Cronbach's alpha. Test-re-test reliability and interrater reliability were verified using the intraclass correlation coefficient (ICC). Content validity was selected to verify the validity. Results: The content validity index of the Korean version of the INCR scale was high, with an average of 0.93. Cronbach's Alpha for Internal consistency also revealed high reliability of 0.89 in all 10 categories. The interclass correlation coefficient of the test-re-test and interrater reliability scores were 0.95 and 0.81, respectively. Conclusion: Our results indicate that the Korean version of the INCR scale would be instrumental in the clinical setting to determine the knowledge, educational needs, and preferences of patients participating in cardiovascular disease and cardiac rehabilitation.

Effect of Horticultural Therapy on Anger Control of the Primary Caregivers for Dementia Patients (원예치료가 치매 환자 주 부양자의 분노조절에 미치는 영향)

  • Kyung-Nam Park;Gye-yeong Heo
    • Journal of Environmental Science International
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    • v.32 no.1
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    • pp.1-9
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    • 2023
  • In this study, a horticultural therapy program was performed by employing the anger experienced by people during daily life activities in the emotion regulation strategy-based program to identify the influence of the horticultural program on anger control in the caregivers for patients with dementia. To measure this influence, two tools were used: a self-administered questionnaire survey, which is a subjective test, and an instrumental test, which can measure the physical index that detects the physical changes through anger. For the preliminary test, depression, stress, self-esteem, anxiety, and anger state-characteristic were tested using the self-administered questionnaire. For the follow-up test, the self-administered survey and the test using the physical index were performed in a manner similar to that of the preliminary test. The self-administered questionnaire comprised questions suitable to this study and considered the age, education level, and economic aspect of the subjects. The test results indicated that the experimental group subjected to the emotion regulation strategy-based horticultural therapy showed very significant reduction in depression and anger and significant reduction in stress, self-esteem, and anxiety. In the physical index test, the systolic and diastolic blood pressures were reduced, and the pulse rate and respiration rate reduced before and after the therapy, thus, proving the effectiveness of the therapy in anger control.