중국 靑島의 한국 산업 이전 유치효과 향상방안 연구 : 靑島 진출 한국 기업의 투자동기 분석을 중심으로

徐永輝,全冬梅 신라대학교 경제경영연구소 2007 경제경영연구 Vol.8 No.-

This study analyzed the main motive of Korean firm's FDI into Qingdao of China in order to improve the effects of attracting Korean firm's FDI to Qingdao. This study first researched the literatures and studies on FDI motive systematically. Then classified it into two groups(low product's costs and Chinese domestic market) and measured Korean firm's features of real motive using survey data of (Korean) firm-level in Qingdao. Finally discussed and showed suggestions for Improving effects of attracting Korean firm's FDI to Qingdao.

저 유전상수 시클로헥산계 플라즈마 고분자 박막의 특성

최자영,권영춘,여상학,정동근 성균관대학교 기초과학연구소 1999 論文集 Vol.50 No.-

In this work, we report on the investigation of the properties of cyclohexane-based plasma polymers (CHexPP) as functions of the deposition pressure and the plasma power. As the deposition pressure was decreased from 2 torr to 0.2 ton with a fixed plasma power of 60W, k value of the CHexPP thin film increased from 2.42 to 3.24. CHexPP thin films deposited at lower deposition pressure showed very good thermal stability, even the one deposited at 0.2 torn was stable up to 400℃. As the plasma power was increased from 10W to 90W with a fixed deposition pressure of 0.2 ton, k value increased from 2.61 to 3.39. The CHexPP thin film deposited at 90W were stable up to 450℃. All the deposited films were insulating. Under applied fields less than 1 MV/cm, leakage current densities were less than 10^-7 A/㎠.

천마 성분인 4-히드록시-메톡시벤즈알데히드 및 파라-히드록시벤즈알데히드의 흰쥐에서의 약물동태

용철순,권기철,김정애,하정희,이동웅,허근 영남대학교 약품개발연구소 1999 영남대학교 약품개발연구소 연구업적집 Vol.9 No.-

Gastrodia elata (GE) is an oriental medicinal herb which has been used traditionally for the treatment of var-ious brain diseases including convulsion and epilepsy. The purpose of this study was to determine pharmacokinetic param-eters of 4-hydroxy-3-methoxybenzaldehyde (HMBA) and p-hydroxybenzaldehyde (PHBA), constituents of GE, in rats. Male rats were cannulated in the femoral vein, femoral artery, bile duct and ureter. They received a single i.v. bolus dose of either HMBA or PHBA through the femoral vein. The concentration of HMBA or PHBA in plasma, bile and urine sam-ples were analyzed by reversed-phase HPLC. HMBA and PHBA have very short half-lives, i.e. 4.03 and 2.26 minutes respectively. Most of HMBA and PHBA were thought to be eliminated through metabolism as the metabolized fraction approaches unity. Derivatives of HMBA or PHBA with longer biological half-lives should be designed to develop better anticonvulsants and more complete qualitative and quantitative understanding of the overall pharmacokinetic fate of these compounds awaits further investigation.

One simple, rapid and economical method for ploidy detection of Trichogramma dendrolimi Matsumura (Hymenoptera Trichogrammatidae)

Liu Quan-quan,Zhang Chen,Zhou Jin-cheng,Dong Qian-jin,Huo Liang-xiao,Dong Hui 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.2

Ploidy diversity provides valuable scientific information, thus making the detection technique of ploidy important. However, traditional methods of cytological observation and flow cytometry are either laborious or expensive. We here report a simple and rapid, effective and economical quantitative PCR (qPCR) approach to determine the ploidy of a parasitoid species Trichogramma dendrolimi Matsumura, an economically important biocontrol agent. We applied a mitochondrial gene cytochrome oxidase (COI) and a nuclear gene forkhead to evaluate the mitochondrial number per nuclear copy in a thelytokous Wolbachia-infected strain of T. dendrolimi and its bisexual uninfected counterparts. The 2 −ΔCq values calculated from C q values which resulted from qPCR experiments were significantly larger in haploid males than that in diploid females. Haploid males possessed about 2.69 times mitochondrial number per nuclear copy as diploid females. Not a single significant difference was found between diploid females from thelytokous and bisexual strains. Based on the differences in relative mitochondrial content, we were allowed to distinguish between haploid males and diploid females. Moreover, the number of mitochondria significantly decreased with higher ploidy level but was not affected by Wolbachiainfection. Our study supplied an available tool to investigate the ploidy diversity in sex determination of T. dendrolimi and thelytokous manipulation of Wolbachia, which is the crucial step to further study their underlying mechanisms. This will in turn contribute to the biocontrol efficiency by enhancing the female production and hence the parasitism rate.

AlGaN/GaN heterostructure pH sensor with multi-sensing segments

Dong, Yan,Son, Dong-hyeok,Dai, Quan,Lee, Jun-Hyeok,Won, Chul-Ho,Kim, Jeong-Gil,Kang, Seung-Hyeon,Lee, Jung-Hee,Chen, Dunjun,Lu, Hai,Zhang, Rong,Zheng, Youdou Elsevier 2018 Sensors and actuators. B, Chemical Vol.260 No.-

<P><B>Abstract</B></P> <P>pH sensor is very important in various fields, and has triggered many types of devices based on different materials and mechanisms. How to improve the performances of the sensors is one of major challenges now. In the present paper, we developed an idea to improve the sensitivity of pH sensors based on AlGaN/GaN high-electron-mobility transistors (HEMTs) by introducing multi-sensing segments, and experimentally fabricated prototype devicesand then investigated their responses to aqueous solutions under different pH values. The optimized sensor exhibits a very high linear sensitivity of 1.35 mA/pH at drain-source voltage of 1.5 V, which is much higher than those of conventional pH sensors with single open gate sensing area. This indicates that the multi-sensing segments is very effective in increasing the sensitivity of the pH sensor, rather than simply increasing the sensing area. The sensors degrade after measurement in solution for a long working time, but they can recover to their initial states in a certain duration after washing, typically ∼24 h. Our finding paves new strategy for the future design of high sensitive and stable pH sensors based on HEMTs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Novel multi-sensing segments pH sensor is designed and fabricated by using AlGaN/GaN high electron mobility transistor. </LI> <LI> Realizing very high sensitivity on the multi-sensing sensor, which is much higher than that of conventional geometric pH sensor. </LI> <LI> Achieved excellent performance stability with good recovery feature on the multi-sensing sensor. </LI> </UL> </P>

A study on the spray characteristics of a piezo pintle-type injector for DI asoline engines

Quan Dong,Tsuneaki Ishima,Hisanobu Kawashima,Wu-qiang Long 대한기계학회 2013 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.27 No.7

We studied the spray flow initiated from a piezo pintle-type injector for DI gasoline engines in an environment supplied by a constant volume vessel by means of laser diagnostics. To fully grasp the effects of the characteristic parameters, including designed spray angle,needle lift, injection pressure (Pinj) and ambient pressure (Pb), on the spray atomization and mixture preparation, particle image velocimetry (PIV) and phase Doppler anemometry (PDA) are used in the experiment, respectively. The gas perpendicularly enters into the outer periphery of the conical spray injected through the pintle-type injector activated by piezo, which creates two large-scale vortices:the vortex A and vortex B. The velocity standard deviation of the spray field is introduced to analyze the gas flow motion in the vicinity of nozzle. The droplet information of spray field is also recorded by PDA in variable boundary conditions. The time dividing method is used to study the droplet characteristics in four parts of spray. The injector with 98° designed spray angle has smaller droplet mean diameter (D10 and D32), due to a larger spray distribution. When the droplet velocity of the spray field is close to 0 m/s, the D10 and D32hold at around 10 μm and 20 μm, respectively, in atmospheric pressure condition, which are about 20 μm and 40 μm, respectively, at ambient pressure of 1.1 MPa.

Loss of halophytism by interference with SOS1 expression.

Oh, Dong-Ha,Leidi, Eduardo,Zhang, Quan,Hwang, Sung-Min,Li, Youzhi,Quintero, Francisco J,Jiang, Xingyu,D'Urzo, Matilde Paino,Lee, Sang Yeol,Zhao, Yanxiu,Bahk, Jeong Dong,Bressan, Ray A,Yun, Dae-Jin,Par American Society of Plant Physiologists 2009 Plant Physiology Vol.151 No.1

<P>The contribution of SOS1 (for Salt Overly Sensitive 1), encoding a sodium/proton antiporter, to plant salinity tolerance was analyzed in wild-type and RNA interference (RNAi) lines of the halophytic Arabidopsis (Arabidopsis thaliana)-relative Thellungiella salsuginea. Under all conditions, SOS1 mRNA abundance was higher in Thellungiella than in Arabidopsis. Ectopic expression of the Thellungiella homolog ThSOS1 suppressed the salt-sensitive phenotype of a Saccharomyces cerevisiae strain lacking sodium ion (Na(+)) efflux transporters and increased salt tolerance of wild-type Arabidopsis. thsos1-RNAi lines of Thellungiella were highly salt sensitive. A representative line, thsos1-4, showed faster Na(+) accumulation, more severe water loss in shoots under salt stress, and slower removal of Na(+) from the root after removal of stress compared with the wild type. thsos1-4 showed drastically higher sodium-specific fluorescence visualized by CoroNa-Green, a sodium-specific fluorophore, than the wild type, inhibition of endocytosis in root tip cells, and cell death in the adjacent elongation zone. After prolonged stress, Na(+) accumulated inside the pericycle in thsos1-4, while sodium was confined in vacuoles of epidermis and cortex cells in the wild type. RNAi-based interference of SOS1 caused cell death in the root elongation zone, accompanied by fragmentation of vacuoles, inhibition of endocytosis, and apoplastic sodium influx into the stele and hence the shoot. Reduction in SOS1 expression changed Thellungiella that normally can grow in seawater-strength sodium chloride solutions into a plant as sensitive to Na(+) as Arabidopsis.</P>

중국 관광객 유치 전략에 관한 연구

전동매(Dong Mei Quan) 한국동북아학회 2006 한국동북아논총 Vol.11 No.2

한ㆍ중 양국 소비문화 비교연구 - 대학생들의 소비 관련 생활방식 특성을 중심으로

全冬梅(Quan Dong-mei),徐永輝(Xu Yong-hui) 대한중국학회 2006 중국학 Vol.27 No.-

  This study attempts to examine the differences of consumption cultures between Korean and China by analysing the consumption life style.<BR>  This study extracts clothing habits, eating habits and shopping patterns from consumption life style and distributes 588 questionnaires to university students of Korea and China.<BR>  The analysis results are as follows:<BR>  There are no differences of fashion orientation and convenience orientation about clothing habits, planned buying orientation, impulsive buying orientation and new product buying orientation about shopping patterns between Korea and China. But there are differences of personality orientation about clothing habits, healthy food orientation and convenience food orientation about eating habits, famous brand buying orientation, internet buying orientation and environment protection product buying orientation about shopping patterns between Korea and China.<BR>  The results offer suggestions to international marketers that different marketing strategy is very necessary according to different consumption cultures.

中韓兩國消費文化比較硏究

全冬梅(Quan, Dong-mei) 전남대학교 글로벌디아스포라연구소 2007 전남대학교 세계한상문화연구단 국제학술회의 Vol.2007 No.2