구리이온을 도입한 Acrylonitrile-Acrylic Acid계 공중합체의 도전성에 관한 연구

손원근,맹기석,김동철,송해영 忠南大學校 産業技術硏究所 1987 산업기술연구논문집 Vol.2 No.2

The AN-AA copolymer-Cu(Ⅱ) and Amidated AN-AA copolymer-Cu(Ⅱ) complex were the most stable in the pH range of 9. The morphology of Cu(Ⅱ) complex and CuxS-induced had changed into compact form. The thermal stability for Cu(Ⅱ) complex and CuxS-induced had been determined through DTA and TGA measurement. As result, it has been observed that thermal stability for Cu(Ⅱ) complex were stabilized less than that of copolymer. The Cu(Ⅱ) complex exhibited surface resistivity around 10Ω㎝ when modified iodine in acetone. The resistivity was significantly affected by the amounts of added cupric chloride, iodine and results were statisfactorily obtained by adding more than 20wt% of Cupric chloride and about 1.0wt% iodine. The optimum condition for the introducing of CuxS was at the CuSO₄concentration of 30g/ℓ and the reaction time of 3hrs. The CuxS-induced electrical conductivity of copolymer was higher by order of 10 than that of the Cu(Ⅱ) complex.

이온교환체로서 Polyphenylene Sulfide Sulfonic Acid에 관한 연구

전병광,손원근,서구원,맹학영,김동철,송해영 충남대학교 공업교육연구소 1994 論文集 Vol.17 No.1

Sulfonated poly(phenylene sulfide)(S-PPS) was prepared by the reaction of poly(phenylene sulfide)(PPS) with fuming sulfuric acid. The sulfonation was confirmed by the high intensity band of the SO_3H group at 1190 cm^-1. Thermally crosslinked S-PPS was used for a cation exchange polymer with high thermal stability. The ion exchange capacity of soluble S-PPS(H-form) and insoluble S-PPS(H-form) was 5.16meq/g and 3.50meq/g, respectively. The ion exchange capacity and IR absorbance at 1190cm^-1 of S-PPS were decreased as the curing temperature was increased.

우울증 증상의 비교문화적 연구 : A Comparison among Chinese, Korean-Chinese in Yanbien and Korean in Seoul 중국 연변의 한족,조선족 및 서울의 한국인 비교

金大虎,金光日,李東根 大韓神經精神醫學會 1995 신경정신의학 Vol.34 No.4

In this transcultural study of symptom of depression, the authors compared symptom of depressive patients among 31 Chinese and 42 Korean-Chinese in Yanbien, China and 60 Korean in Seoul. Hamilton's Rating Scale for Depression and Beck's Depression Inventory were used for assessment. Korean depressives manifested highest scores in depressive mood, dissatisfaction, guilty feeling and loss of work and interest, whereas Chinese manifested highest scores in loss of work and interest, loss of libido, insomnia, delayed insomnia, retardation, agitation and self-dislike. On the others, Korean-Chinese were prominent in the symptoms of agitation, self-dislike, retardation and hypochondriasis. The above findings suggest that Korean depressives are characterized by psychological symptoms and Chinese depressives are characterized by somatic symptoms. Korean-chinese depressives intermediated between Chinese and Korean in terms of comatic/psychological continum. The above findings were discussed by cultural differences between Korea and China and cultural pleuralism of Korean-Chinese.

중국, 한국, 조선족 중고등학생의 학교따돌림 피해실태에 대한 비교연구

최미경,김광일,박용천,이동근,고복자 關東大學校 醫科大學 醫科學硏究所 2004 關東醫大學術誌 Vol.8 No.2

This study was attempted to compare the aspects of victims including incidence rate of bullying victims, type of bullying and period and place of bullying for the past one year among Chinese, Korean and Korean-Chinese juveniles of 605, 683 and 617, respectively. Investigation with the self-administered questionnaire was conducted, which was for Korean, Chinese and Korean-Chinese junior high and high school students(12 schools in total of each 2 junior high schools and each 2 high schools) in Seoul and Yanbian between Oct. 2001 and Mar. 2002. Findings of this study are as follows: The definite characteristics of Korean victims were found: Generally, they showed low incidence rate of bullying victims but they showed more "alienated follower type" bullying, more period and frequency of bullying, and more collective bullying than Chinese and Korean-Chinese students. Also, they showed more severe psychological pain and lethargy - a state of sluggishness when other students are bullied - compared to Chinese and Korean-Chinese students. The other side, most of Korean-Chinese victims replied "They wanted revenge" as a feeling after being bullied like Korean victims but significant numbers of them replied "They endured" as a coping method, suggesting their psychological pain. On the other hand, Korean-Chinese students showed more bullying victims "outside the school" than Korean and Chinese students, suggesting difficulty in intervention. It is concluded that comparative studies on individual conditions and cultural characteristics of the victims are further needed in order to make the above-mentioned differences clear.

Life Science : Topoisomerase I and II Inhibitory Activities and Cytotoxic Constituents from the Barks of Tilia amurnesis

( Dong Gen Piap ),( You Jeong Lee ),( Chang Seob Seo ),( Chong Soon Lee ),( Jae Ryong Kim ),( Hyun Wook Chang ),( Jong Keun Son ) 영남대학교 약품개발연구소 2012 영남대학교 약품개발연구소 연구업적집 Vol.22 No.0

Eight compounds, squalene (1), friedelin (2), b-sitosterol (3), b-sitosterol-3-O-glucoside (4), a-tocopherol (5), betulinic acid (6), trilinolein (7) and 1-O-(9Z,12Z-Octadecadienoyl)-3-nonadecanoyl glycerol (8), were isolated from the barks of Tilia amurensis. Their chemical structures were identified by comparing their physicochemical and spectral data with those published in the literature. These isolated compounds were examined for their inhibitory activities against topoisomerase I and II. Compound 7 showed significant inhibition of DNA topoisomerase I and II activities, with percent decreases in activity of 87 and 95%, respectively at a concentration of 100 mM. Compound 6 exhibited cytotoxicity against the human colon adenocarcinoma cell line (HT-29), the human breast adenocarcinoma cell line (MCF-7) and the human liver hepatoblastoma cell line (HepG-2), with IC50 values of 20, 59 and 16 mM, respectively.

Topoisomerase I and II Inhibitory Activities and Cytotoxic Constituents from the Barks of Tilia amurnesis

Dong Gen Piao,이유정,서창섭,이종순,김재룡,장현욱,손종근 한국생약학회 2011 Natural Product Sciences Vol.17 No.3

Eight compounds, squalene (1), friedelin (2), b-sitosterol (3), b-sitosterol-3-O-glucoside (4), a-tocopherol (5), betulinic acid (6), trilinolein (7) and 1-O-(9Z,12Z-Octadecadienoyl)-3-nonadecanoyl glycerol (8), were isolated from the barks of Tilia amurensis. Their chemical structures were identified by comparing their physicochemical and spectral data with those published in the literature. These isolated compounds were examined for their inhibitory activities against topoisomerase I and II. Compound 7 showed significant inhibition of DNA topoisomerase I and II activities, with percent decreases in activity of 87 and 95%, respectively at a concentration of 100 mM. Compound 6 exhibited cytotoxicity against the human colon adenocarcinoma cell line (HT-29), the human breast adenocarcinoma cell line (MCF-7) and the human liver hepatoblastoma cell line (HepG-2), with IC50 values of 20, 59 and 16 mM, respectively.

글로벌시대 중국의 체제전환과 도시종족공동체 재형성 -북경 왕징 코리아타운의 조선족 공동체 사례 연구-

예동근 ( Dong Gen Rui ) 한국민족연구원 2010 민족연구 Vol.0 No.43

Marine (sea) Familiarity Index and Its Influence to National Image

Rui, Dong-Gen,Jung, Yong-Ki,Lee, Chun-Su East Asia Business Economics Association 2019 East asian journal of business management Vol.7 No.3

Purposes - This study discusses various aspects of familiarity with the sea and how familiarity with the sea is perceived. This study also summarizes the literature on the factors of previous researches that affect the formation or decision of national image. Research design and methodology - Sea familiarity index was derived from the results of recognition of free association with the sea, friendliness with the sea, association of the sea with life, interest to the sea, Korea's representative marine regions, and sea related emotionalism. The familiarity with the sea (ocean) perceived by foreign visitors or foreigners in the future will be helpful in deriving a comparative research. Results - This study has identified the marine tourism resources, marine ecology, and the cognitive and emotional situations consumers feel that should be developed practically. If a continuous time series research is conducted in the future through these, it will be a chance to provide a basis for consumers' dynamic awareness. Conclusions - Through this study, it is pointed out that the research utilizing the sea and ocean to form national image highly suggested an opportunity to add and utilize new variables academically. This study on the perspective of the formation of national image suggests a new approach to add and utilize new variables to future research using the sea and ocean.

다국적 기업의 중국 진출에 대한 사례 분석

예동근(Dong Gen Rui),이춘수(Chun Su Lee) 한국무역연구원 2015 무역연구 Vol.11 No.4

In China, with a high context culture, Guanxi has long history and tradition and acts as an ‘invisible hand’. Guanxi is evolving in various forms in accordance with changing times. Guanxi is composed of diverse elements and thus substantial time, money and network are need for foreign firms to grasp its meaning and to utilize it. In this study, how Guanzi acts as an entry barrier for foreign firms in real Chinese business world are explored by conducting interviews on executives and employees in multinational home appliances, shipping logistics company and vessel engine manufacturer to develop case studies on influence of Guanxi and associated problems, predicaments and irregularities faced, and failures experienced. By doing so, implications for Korean firms and research Implications for future studies were drawn. Research Implication 1: Due to western influence, Chinese Guanxi are increasingly becoming business-minded and instrumental Guanxi and does not exerts continual influence but only temporary and isolated influence that are guided by self-interest. Research Implication 2: As Chinese economy becomes advanced, Guanxi will become more transparent and thus quality and price competitiveness will become more important factor than Guanxi influence. Research Implication 3: Since Chinese Guanxi is reciprocal and cultural sentiment of face-saving and recognition, a compensation in return must be provided in order for Guanxi to continue.

조선족의 도시 이주적응과 다민족관계

예동근(Rui, Dong Gen) 전남대학교 글로벌디아스포라연구소 2012 디아스포라 연구 Vol.6 No.1

본 연구는 조선족집단이 전통적 집거지에서 초국가적 환경의 도시지역으로 이주, 정착하는 과정을 살펴보았다. 그리고 초국가적 환경에서 조선족이 현지의 한족, 도시에 집거한 한국인, 그리고 조선족 내부의 관계를 살펴보았다. 본 연구는 조선족집단이 초국가적 환경에서 나타는 민족관계가 전통적 집거 지역에서 나타나는 관계가 어떻게 다른가를 구체적으로 비교하였고 차후 중국 사회가 도시화를 거치면서 전반 민족관계가 도시중심의 민족관계로 이동되는 시점에 조선족의 다민족관계가 갖는 시사점을 찾고자 하였다. This paper investigates the process of migration and settlement of Chaoxianzu community from traditional assembly areas to trans-national urban areas, and examines the relationships between Chaoxianzu community, Hanzu community and Korean community, as well as intra-Chaoxianzu community relationships. After comparing the ethnic relationships of Chaoxianzu community in the environment in traditional assembly areas and supernational urban areas, this research aims to find out the implications of the ethnic relationships of Chaoxianzu community in China’s urbanization process.