河川形態學的 特性因子와 河天從斷과의 相關性

申桂鍾,閔彰東 忠州大學校 1982 한국교통대학교 논문집 Vol.15 No.2

The writer has chosen 9 rivulets of MIHO stream basin and computed the theoretical profile morphology of a rivulets by correlation some morphological characteristic factors which is calculated by Horton's Law to the expression of theoretical profile (Zm=e (c+E) ??-(D+F)u, Xm=e?? ?? e-DU) and to the expression of equilibrium profile (Zm=ne(C+E)). After that the writer compared the theoretical profile morphology with the actual profile morphology of a rivulet. The result was as follows: In the same stream system BAEG-COG rivulet and CHEON-SU rivulet revealed close to 1 of e D+F value, and Mu-shim rivulet and BO-GANG rivulet revealed over 1 of eD+F value, which means the formers are in the state of adolescence and the latters are in the state of Senescence. Here, we could see that the geological developing process in the same stream system differs from each rivulet.

Bacillus kyonggiensis sp. nov., Isolated from Soil of a Lettuce Field

Ke Dong,Sangseob Lee 한국미생물학회 2011 The journal of microbiology Vol.49 No.5

A Gram-positive, rod-shaped, motile, endospore-forming bacterial strain, designated NB22^T, was isolated from soil of a lettuce field in Kyonggi province, South Korea, and was characterized by using a polyphasic taxonomic approach. This novel isolate grew optimally at 30-37°C and pH 8-9. It grew in the presence of 0-4% NaCl (optimum, 1-2%). Comparative 16S rRNA gene sequence analysis showed that strain NB22^T was closely related to members of the genus Bacillus and fell within a coherent cluster comprising B. siralis 171544^T (98.1%) and B. korlensis ZLC-26^T (97.3%). The levels of 16S rRNA gene sequence similarity with respect to other Bacillus species with validly published names were less than 96.4%. Strain NB22T had a genomic DNA G+C content of 36.3 mol% and the predominant respiratory quinone was MK-7. The peptidoglycan contained meso-diaminopimelic acid. The major cellular fatty acids were iso-C_(15:0), anteiso-C_(15:0), C_(14:0), and C_(16:0). These chemotaxonomic results supported the affiliation of strain NB22^T to the genus Bacillus, and the low DNA-DNA relatedness values and distinguishing phenotypic characteristics allowed genotypic and phenotypic differentiation of strain NB22^T from recognized Bacillus species. On the basis of the evidence presented, strain NB22^T is considered to represent a novel species of the genus Bacillus, for which the name Bacillus kyonggiensis sp. nov. is proposed. The type strain is NB22^T (=KEMB 5401-267^T =JCM 17569^T).

Generalized soil Thaumarchaeota community in weathering rock and saprolite.

Dong, Ke,Kim, Woo-Sung,Tripathi, Binu Mani,Adams, Jonathan Springer-Verlag 2015 Microbial ecology Vol.69 No.2

<P>Relatively little is known of the archaeal communities associated with endolithic environments, compared to other microbial groups such as bacteria and fungi. Analyzing the pyrosequenced archaeal 16S ribosomal RNA (rRNA) gene V1-V3 region, we investigated the archaeal community associated with aboveground-exfoliated weathering layers of a granite gneiss, and of the saprolite derived from this rock at 1 m depth below the soil surface, in a forested hilly area south of Seoul, South Korea. In both these sites, an archaeal community dominated by the phylum Thaumarchaeota was identified. The archaeal community in all cases closely resembled that of the surface layer of acidic soils in temperate climates of Korea. It appears that there is no clear distinction in archaeal community composition between a soil and a rock and a saprolite despite a tremendous difference in the concentration of total nitrogen and organic carbon. Of the chemical properties we measured, pH was the best predictor of the archaeal community composition and relative abundance of thaumarchaeal subphyla. These findings reinforce the view that soil archaea are mostly generalists, whose ecology is not closely dependent on nitrogen concentration or soil organic matter status, the presence of living roots, or the abundant presence of any other biota.</P>

Human Resources Management in Enterprise-The Case of Haier-

Ke-Yong Dong 한국인사관리학회 1998 조직과 인사관리연구 Vol.22 No.2

Licochalcone A, a Natural Inhibitor of c-Jun <i>N</i>-Terminal Kinase 1

Yao, Ke,Chen, Hanyong,Lee, Mee-Hyun,Li, Haitao,Ma, Weiya,Peng, Cong,Song, Nu Ry,Lee, Ki Won,Bode, Ann M.,Dong, Ziming,Dong, Zigang American Association for Cancer Research 2014 Cancer Prevention Research Vol.7 No.1

<P>The c-<I>Jun N</I>-terminal kinases (JNK) play an important role in many physiologic processes induced by numerous stress signals. Each JNK protein appears to have a distinct function in cancer, diabetes, or Parkinson's disease. Herein, we found that licochalcone A, a major phenolic constituent isolated from licorice root, suppressed JNK1 activity but had little effect on JNK2 <I>in vitro</I> activity. Although licochalcone A binds with JIP1 competitively with either JNK1 or JNK2, a computer simulation model showed that after licochalcone A binding, the ATP-binding cleft of JNK1 was distorted more substantially than that of JNK2. This could reduce the affinity of JNK1 more than JNK2 for ATP binding. Furthermore, licochalcone A inhibited JNK1-mediated, but not JNK2-mediated, c-Jun phosphorylation in both <I>ex vivo</I> and <I>in vitro</I> systems. We also observed that in colon and pancreatic cancer cell lines, JNK1 is highly expressed compared with normal cell lines. In cancer cell lines, treatment with licochalcone A or knocking down JNK1 expression suppressed colon and pancreatic cancer cell proliferation and colony formation. The inhibition resulted in G<SUB>1</SUB> phase arrest and apoptosis. Moreover, an <I>in vivo</I> xenograft mouse study showed that licochalcone A treatment effectively suppressed the growth of HCT116 xenografts, without affecting the body weight of mice. These results show that licochalcone A is a selective JNK1 inhibitor. Therefore, we suggest that because of the critical role of JNK1 in colon cancer and pancreatic carcinogenesis, licochalcone A might have preventive or therapeutic potential against these devastating diseases. <I>Cancer Prev Res; 7(1); 139–49. ©2013 AACR</I>.</P>

한국형 바다풀장의 내구성 연구

이동윤(Lee, Dong Yun),천커챵(Chen, Ke Qiang),김문기(Kim, Mun Gi),김동목(Kim, Dong Mok),이영재(Lee, Young Jae) 대한토목학회 2016 대한토목학회 학술대회 Vol.2016 No.10

Clinical Significance of Joint Detection of Serum VEGF, SIL-2R and HGF in Patients with Primary Hepatocellular Carcinoma before and after Percutaneous Microwave Coagulation Therapy

Chen, Ji-Dong,Xiong, Yan-Qun,Dong, Ke,Luo, Jun,Yue, Lin-Xian,Chen, Qin Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.11

Objective: To investigate the changes of serum vascular endothelial growth factor (VEGF), soluble interleukin-2 receptor (SIL-2R) and hepatocyte growth factor (HGF) contents in patients with primary hepatocellular carcinoma (HCC) before and after percutaneous microwave coagulation therapy (PMCT) and determine their clinical significance. Materials and Methods: Fasting venous blood (3 mL) from 81 patients with primary HCC diagnosed by pathology was collected in the mornings 1 day before PMCT, and 1 day, 7 days and 1 month after PMCT, and then the serum was separated and stored in $-70^{\circ}C$. The contents of VEGF, SIL-2R and HGF were detected by enzyme linked immunosorbent assay (ELISA). Results: The serum VEGF, SIL-2R and HGF contents in 81 patients with primary HCC had obviously dynamic changes before and after PMCT. By comparison to 1 day after PMCT with pre-operation, there was no statistical significance regarding VEGF and SIL-2R contents (P>0.05), but HGF content showed significant difference (P<0.01). Compared with pre-operation, VEGF, SIL-2R and HGF contents 7 days and 1 month after PMCT all manifested significant differences (P<0.01). By comparison to 7 days with 1 month after PMCT, there was no statistical significance regarding the VEGF content (P>0.05), whereas SIL-2R and HGF contents showed significant change (P<0.01). Conclusions: The contents of serum VEGF, SIL-2R and HGF have obviously dynamic changes in primary HCC before and after PMCT, and their joint detection is expected to be an effective hematologic evaluation index of PMCT for primary HCC.

Spectrophotometric Determination of Palladium after Solid-liquid Extraction with 4-(2-Pyridylazo)-resorcinol at 90°C

Dong, Yanjie,Gai, Ke Korean Chemical Society 2005 Bulletin of the Korean Chemical Society Vol.26 No.6

An effective spectrophotometric determination of palladium with 4-(2-pyridylazo)-resorcinol (PAR) using molten naphthalene as a diluent has been studied. A red complex of palladium with PAR is formed at 90 ${^{\circ}C}$. In the range of pH 9.0-11.0, the complex is quantitatively extracted into molten naphthalene. The organic phase is anhydrously dissolved in $CHCl_3$ to be determined spectrophotometrically at 520 nm against the reagent blank. Beer’s law is obeyed over the concentration range of 0.1-2 ${\mu}g{\cdot}mL^{-1}$. The molar absorptivity and Sandell’s sensitivity are 8.0 ${\times}\;10^5\;L{\cdot}mol^{-1}{\cdot}cm^{-}1\;and\;0.49\;{\mu}g{\cdot}cm^{-2}$ respectively. From the results of tolerance limits, it was found that there was no interferences were observed for most of the ions examined and those somewhat high interferences by Co(II), Fe(II) and Bi(III) could be effectively masked by EDTA.

도심주변 국토환경성평가지도를 이용한 난개발 정도

신계종,황의진,최동분 한국교통대학교 2014 한국교통대학교 논문집 Vol.49 No.-

Study on Analysis of sprawling developmentbecause of improper location by judging propriety of the development location targeting on the developments conducted recently. We did pre-research on the developments of city and country in Chungcheongbuk-do for recent three year, then classified the development works according to five grade of National Environmentsal Zonging Map which is index of reserve, buffer and , by using GIS analysis tool to judge the propriety of the location.

Effect of CoFe₂O₄ nanoparticles on a carbonyl iron based magnetorheological suspension

Dong, Yu Zhen,Piao, Shang Hao,Zhang, Ke,Choi, Hyoung Jin Elsevier 2018 Colloids and surfaces. A, Physicochemical and engi Vol.537 No.-

<P><B>Abstract</B></P> <P>Magnetic CoFe<SUB>2</SUB>O<SUB>4</SUB> nanoparticles were successfully fabricated by a non-aqueous hydrothermal method and used as an additive in a micron-sized, carbonyl iron (CI) based-magnetorheological (MR) fluid to improve its dispersion stability and MR characteristics. The morphology and magnetic properties of CoFe<SUB>2</SUB>O<SUB>4</SUB> were demonstrated by using X-ray diffraction, scanning electron microscopy, and vibrating sample magnetometry. The results showed that CoFe<SUB>2</SUB>O<SUB>4</SUB> was synthesized successfully with a nearly spherical morphology and excellent crystalline structure. The saturation magnetization (Ms) of the CoFe<SUB>2</SUB>O<SUB>4</SUB> was also about 74.4 emu/g. The CI MR fluid was prepared by dispersing 50wt% of CI particles in silicone oil, and the CI/CoFe<SUB>2</SUB>O<SUB>4</SUB> MR fluid was prepared by adding 0.1wt% of CoFe<SUB>2</SUB>O<SUB>4</SUB> nanoparticles to the CI MR fluid. The MR characteristics of both MR fluids were tested via a rotational rheometer at various magnetic field strengths. The CI/CoFe<SUB>2</SUB>O<SUB>4</SUB> MR fluid showed enhanced MR characteristics with higher yield stress, shear viscosity, and dynamic modulus than that of the CI MR fluid. Furthermore, the dispersion stability of both MR fluids were also investigated via a Turbiscan optical analyzer system, and these results showed that the sedimentation ratio after 24h had improved by about 21%.</P> <P><B>Graphical abstract</B></P> <P>Magnetic CoFe2O4 nanoparticles were successfully fabricated by a non-aqueous hydrothermal method and used as an additive in a micron-sized, carbonyl iron (CI) based-magnetorheological (MR) fluid. The magnetorheological characteristics and dispersion stabilities for two kinds of CI based-MR fluid with and without CoFe2O4 additives were investigated.</P> <P>[DISPLAY OMISSION]</P>