• Natural Product Sciences
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• v.20 no.2
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• pp.119-125
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• 2014

According to the results of my study on the chromatographic analysis of fresh ginseng (Panax ginseng C. A. Meyer) roots, most of the contents of protopanxadiol ginsenosides $Rb_1$, Rc, $Rb_2$, and Rd are derived from the corresponding malonyl ginsenosides in fresh ginseng by a heat process. Also, I confirmed that acetyl ginsenosides are naturally occurring constituents in fresh ginseng, not decarboxylates from malonyl ginsenosides. Seven neutral ginsenosides $Rg_1$, Re, Rf, Rc, $Rb_1$, $Rb_2$, and Rd were transformed to specific conversions in red ginseng preparation conditions. The conversion paths progress by three rules concluded from my study. These conversion rules are I: the ether bond is stable at positions 3 and 6 in the dammarane skeleton, II: the ether bond between sugars is stable in glycosides, and III: the ether bond to glycosides is unstable at position 20 in the dammarane skeleton.

• The Journal of the Korea Contents Association
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• v.20 no.3
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• pp.245-253
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• 2020

If the conversion rate of jeonse price to monthly rent is the market interest rate or the landlord's expected return, then the conversion rate of jeonse price to monthly rent in the country should be the same. However, the conversion rate of jeonse price to monthly rent has always been higher than the market interest rate. This study identifies the supply cost components of rental housing as a risk premium in the presence of current housing prices, market interest rates, depreciation costs, holding taxes, and leases, and identifies the relationship between the current housing prices and each factor. Housing rent is expressed as the current price. This overcomes the shortcomings that implicitly assume fluctuations in housing prices or do not include current housing prices in the conversion rate of jeonse price to monthly rent. This study found that the conversion rate of jeonse price to monthly rent is the required rate of return or required rate of renter, not market interest rate, by expressing the supply cost of rental housing as a combination of components. This not only explained the fact that the conversion rate of jeonse price to monthly rent was always higher than the market interest rate, but also explained the regional differences. It also explained why the conversion rate of jeonse price to monthly rent varies by type of housing.

• YAKHAK HOEJI
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• v.42 no.1
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• pp.31-38
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• 1998

Dextran-5-(4-ethoxycarbonylphenylazo)salicylic acid ester(Dextran-5-ESA) was synthesized as a potential colon-specific prodrug of 5-aminosalicylic acid (5-ASA). No free 5-(4-eth oxycarbonylphenylazo) salicylic acid (5-ESA) was detected when the chemical stability of dextran-5-ESA was tested at pH 1.2, or pH 6.8 bath solution, Effects of the degree of substitution (DS) and molecular weight of dextran on the depolymerization by dextranase was investigated. Depolymerization(%) decreased with increasing DS, and was not affected by M.W. of dextran. The extent of prodrug conversion after incubation in the contents of various G.I. Tract segments of rats was evaluated. 5-ASA was released in the cecal contents, but not in the contents of proximal small intestine (PSI) or distal small intestine (DSI). No significant prodrug conversion was observed in the cecal contents of rats pretreated with kanamycin sulfate, which indicated that microbial enzymes were responsible for the cleavage of the prodrug.

• Journal of Korea Multimedia Society
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• v.18 no.12
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• pp.1562-1568
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• 2015

The 3D contents are getting more attentions in various areas, such as in movies, advertising, games and exhibition contents. There are many authoring tools for making 3D Models and contents. However, those authoring tools take considerable amount of time to learn and to make 3D contents. In this paper, we propose the 3D model conversion algorithm to make 3D models from 2D pictures drawn on the touch screens or papers. The vertex animation method also proposed for the interactive 3D aquarium. The proposed vertex animation algorithm was tested for virtual 3D water creatures and compared with human-made animation. An Interactive 3D aquarium was implemented by using those proposed algorithms. Thus the simplicity and effectiveness of the algorithms can be applied to diverse industries.

• The Journal of the Korea Contents Association
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• v.8 no.5
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• pp.176-183
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• 2008

The transition to digital television is a massive and complex undertaking, affecting virtually every segment of the television industry and all viewers who watch television. In this respect, consequences of digital conversion of broadcasting and its related industries are so tremendous that countermeasure establishment for activation of digital broadcasting and programming industry is required. This paper explores the current situation of digital broadcasting in terms of the channel operation and contents focusing on the cases of the U.S. and U.K. In doing so, this paper presents reasonable directions and policy suggestions that should be resolved to advance Korean digital broadcasting.

• Journal of Hydrogen and New Energy
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• v.17 no.3
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• pp.317-323
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• 2006

Electric conductive material should be homogeneously mixed with sulfur in sulfur electrode fabrication of lithium/sulfur battery, because sulfur is electric insulator. In this paper electrochemical properties of Li/S battery was studied with various compositions of sulfur electrodes. When content of sulfur changed from 40 wt.% to 80 wt.%, the 60 wt.% sulfur electrode showed the maximum capacity of 1489 mAh/g-sulfur. Electrochemical properties of Li/S battery using 60 wt.% sulfur was also investigated with various carbon contents. The discharge capacity changed as a function of carbon contents. The optimum composition was 25 wt.% carbon for 60 wt.% sulfur electrode.

• The Korean Journal of Ecology
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• v.27 no.4
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• pp.217-224
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• 2004

The purpose of this study is to clarify the effects of the conversion of the forest management type from a natural deciduous broad-leaved forest to an artificial evergreen coniferous forest based on organic matter dynamics. We investigated the amounts and carbon contents of the forest floor and the litterfall, soil chemical characteristics and cellulose decomposition rates in the natural deciduous broad-leaved forest and adjacent artificial evergreen coniferous forest. In the artificial evergreen coniferous forest were planted Japanese cypress (Chamaecyparis obtusa) on the upper slope and Japanese cedar (Cryptomeria japonica) on the lower slope. The soil carbon and nitrogen contents, CEC and microbial activity had decreased due to the conversion of the forest management type from a natural deciduous broad-leaved forest to an artificial Japanese cypress forest, and were almost the same for the conversion to a Japanese cedar forest. Under the same conditions, it is considered that the soil fertility was different by planting specific tree species because the organic matter dynamics were changed by them.

• The Journal of the Korea Contents Association
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• v.10 no.4
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• pp.367-374
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• 2010

The purpose of this study is suggesting proper support policy for the social enterprises by investigating the agency's needs of aiming social enterprise. The major findings of this research are as follows. Inter obstacle factors are the lack of operating and investment funds, and preceding condition for social enterprise's conversion is most important is finance support. The preparation of social enterprise's establishment and operating fund is needed in the conversion's process for social enterprise, and the important issues that central and local government have to solve are the support of labor cost and the obligation of trusts and purchases. Therefore, central and local government have to support initially funds for having facilities and staffs in social enterprises, and support forming market for the goods and services of social enterprises.

• Archives of Pharmacal Research
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• v.19 no.4
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• pp.326-334
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• 1996

We investigated the optimum conditions for conversion of water-insoluble components of basidiocarps of Ganoderma lucidum to water-soluble components by hydrolyzing with chitinase. We also tried it with Ganoderma luciclum residue remaining after extracting hot water-soluble components of Ganoderma lucidum. After hydrolyzing under optimum conditions (20 ppm chitinase, 2% Ganoderma lucidum or 6% Ganoderma lucidum residue, at pH 3 and at $ 35^{\circ}C$), the contents of total water-soluble components (polysaccharide or protein) were measured, and it was found that the contents of water-soluble components increased to 1.5-2.7 fold. Michaelis constant, $K_m$ and maximum rate, $V_max$ calculated by Lineweaver-Burk plot for hydrolysis of Ganoderma lucidum were 1.75% and 0.02%/min respectively and those for hydrolysis of Ganoderma lucidum residue were 53.15% and 0.53%/min respectively The protein-bound polysaccharide was isolated after hydrolysis and molecular weights were measured by Sepharose CL-4B gel filtration and compared with the molecular weights of polysaccharide before hydrolysis.

• Proceedings of the Korea Contents Association Conference
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• 2006.11a
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• pp.512-515
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• 2006

This paper proposes the solution of compatibility problem between heterogeneous by converting automatically CAD data into proper data for the PCB board production process by using IC item information. This paper has a purpose of maximizing work efficiency with NC Programming automation and contributing to maximize productivity by NC program conversion of different Mounters and Mounter Data & Line Balance optimization.