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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Chosun Natural Science
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Journal DOI :
The Research Institute of Chosun Natural Science
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Volume & Issues
Volume 1, Issue 3 - Dec 2008
Volume 1, Issue 2 - Sep 2008
Volume 1, Issue 1 - Jun 2008
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The quantification of photon counts using the concept of candela
Kim, Hyeon Sik ; Choi, Eun Seo ; Lee, Byeong-Il ;
Journal of the Chosun Natural Science, volume 1, issue 1, 2008, Pages 1~4
We developed quantification method based on the concept of candela in physics. The measurement of fluorescence signal from a nude mouse in the research of molecular biology. In the measurement of the optical signal with CCD, the quantification method for photon counts based on bio-luminescence imaging technique can provide comparative reference data. In this paper, we described theoretical derivation of our proposed concept. We hope this method could be a useful standard reference for quantitative date analysis in optical imaging.
The Coevolution of Cooperation and Trait Distinction
Yang, Jae-Suk ; Choi, Jung-Kyoo ; Jo, Hang-Hyun ;
Journal of the Chosun Natural Science, volume 1, issue 1, 2008, Pages 5~13
Synthesis and Characterization of Boronated Organic Compounds
Lee, Jong-Dae ;
Journal of the Chosun Natural Science, volume 1, issue 1, 2008, Pages 14~18
A method for synthesizing o-carborane substituted tetrahydroindoles derivatives, starting from tryptamine, is described. In vitro studies showed the desired compounds 9 and 10 synthesized accumulate to high levels in B-16 melanoma cells with low cytotoxicity.
Effect of Morus alba extract for hair growth promotion in C57BL/6 mouse
Jung, Juyoung ; Park, Jaeyoung ; Cheong, Hyeonsook ;
Journal of the Chosun Natural Science, volume 1, issue 1, 2008, Pages 19~23
Morus alba has been well known for its tonic effect or preventing of hypertension, aging, or diabetes mellitus in Asian countries. To evaluate the its effect on hair growth promotion, we performed the hair regrowth experiment with leaf, branch, root and fruit extract of Morus alba on animal model of C57BL/6 mouse. The hair regrowth effect was remarkable in the mouse treated branch and root extract (with what %), however, little effect on hair regrowth appeared on the mouse treated with leaf extract. Morus alba extract displayed antibacterial effects on Bacillus subtilis, Staphylococcus aureus, Pseudomonas and Candida albicans. These results indicated that branch and root extract of Morus alba could be applicable for hair regrowth or prevention of hair loss in human.
Interaction of brassinosteroids and cytokinin in modulating light mediated signaling in Arabidopsis
Hwang, Indeok ; Paudyal, Dilli P. ; Cheong, Hyeonsook ;
Journal of the Chosun Natural Science, volume 1, issue 1, 2008, Pages 24~31
Brassinosteroids (BRs) are a special class of plant steroid hormones that are essential for normal growth and development. Part of confusion is whether BRs are unique to plants, because they have overlapping physiological roles with other better-studied hormones and with physiological responses caused by light. In systems designed to assay for cytokinins, the effects of BRs vary. We measured hypocotyl length for testing the ability of brassinolide (BL) to rescue double mutant between det2 and the photoreceptor null mutant phytochrome B (phyB). PHYB involved in controlling hypocotyl elongation in increased concentration of BL whereas phyBdet2 double mutant just partially rescue to phyB in white and red light indicated the involvement of BRs in PHYB regulated cell elongation. BRs regulated hypocotyl growth was delayed by BAP, a cytokinin treatment but inhibitory effects of BAPs on hypocotyl growth was slightly recovered by BL. The result indicated that the mode of action of BR and cytokinin is independent or sequential in the downstream light-regulated response control on hypocotyl elongation and also light modulated the action of BR and cytokinin in some extent.
The luminance variation of inner-scatterer light guide panel by various surface-scatterer
Choi, Young Hee ; Shin, Youngjin ; Choi, Eun Seo ;
Journal of the Chosun Natural Science, volume 1, issue 1, 2008, Pages 32~35
We fabricated surface pattern on a light guide panel (LGP) using
laser to improve the luminescence performance of inner-scatterer LGP, which is made of PMMA sample with exploiting Q-switched
harmonic Nd:YAG laser engraving system, and the effect of surface pattern in the brightness distribution of LGP was analysed. To prove the feasibility of proposed method in the enhancement of LGP performance, we designed three different surface patterns on the inner-scatterer LGP. The experimental results has proved the potential in the application of surface pattern to increasing the brightness of inner-scatterer LGP.
The Visualization of Damage Spreading Method Using JAVA Applet
Kwak, Wooseop ;
Journal of the Chosun Natural Science, volume 1, issue 1, 2008, Pages 36~40
Effect of Lavender (Lavendular officinalis) Essential Oil on Nitric Oxide Production in UVB-irradiated mice
Song, Seon-Young ; Lee, Hyun-Hwa ;
Journal of the Chosun Natural Science, volume 1, issue 1, 2008, Pages 41~46
The aim of this study is to evaluate the effects essential oil from Lavendular officinalis on the production of UVB-irradiated-induced nitric oxide(NO), in vivo and in vitro. NO is a recently discovered mediator of cell communication involved in a variety of physiological and pathophysiological processes. This enzyme is present in various tissues including smooth muscle cells and macrophages and take part in several immunopathological process. In vitro, the cytotoxicity and cell viability of aroma oil was evaluated by the MTT assay in the concentration of 0.01, 0.05, 0.1%. And, the effect of aroma oil was investigated to production of NO in human fibroblast cells line CCD-986sk (
cell/well) after UVB-irradiation with aroma oil (0.01, 0.1, and 1%). The result showed that aroma oil did not affected the production of NO. In vivo, it was investigated to production of NO after UVB- irradiation with aroma oil. The experimental groups were divided into four groups. Aroma oil was stimulated the production of NO by itself. As the results, all of the in vitro and in vivo, aroma oil were affected production of NO by dependent the concentration-manners.
Study of antimicrobial activity and the mode of action of Anal P5 peptide
Park, Yoonkyung ; Hahm, Kyung-Soo ;
Journal of the Chosun Natural Science, volume 1, issue 1, 2008, Pages 47~53
In a previous study, we showed that Cecropin A (1-8)-Magainin 2 (1-12) hybrid peptide (CA-MA)'s analogue, Anal P5, exhibit broad-spectrum antimicrobial activity. Anal P5, designed by flexible region (positions 9, 10)-substitution, Lys- (positions 4, 8, 14, 15) and Leu- (positions 5, 6, 12, 13, 16, 17, 20) substitutions, showed an enhanced antimicrobial and antitumor activity without hemolysis. The primary objective of the present study was to gain insight into the relevant mechanisms of antimicrobial activities of Anal P5 by using flow cytometric analysis. Anal P5 exhibits strong antifungal activity in a salt concentration independent manner. In addition, Anal P5 causes significant morphological alterations of the bacterial surfaces as shown by scanning electron microscopy, supporting its antibacterial activity. Its potent antibiotic activity suggests that Anal P5 is an excellent candidate as a lead compound for the development of novel antibiotic agents.
The Characteristic of
Thin Films Grown by LP-Thermal MOCVD
Jeong, Jin ;
Journal of the Chosun Natural Science, volume 1, issue 1, 2008, Pages 54~57
This report examines the variation on structural properties of
thin films. TEM studies shows some of the interfaces to be atomically faceted. Secondary X-ray photoelectron Spectroscopy Analysis(XPS) depth profiles show that films have a uniform composition along the depth.