• YAKHAK HOEJI
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• v.40 no.2
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• pp.135-140
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• 1996

Ion-selective poly(vinyl chloride)(PVC) membrane electrodes for the determination of the calcium antagonist verapamil and its pharmaceutical preparations were described. Verapam il-superchrome garnet Y(SGY), lumogallion(LG), acid red 97(AR97), Dragendorff(DD) and Meyer reagent ion pairs were inverstigated as an electroactive compound for membrane electrode. Stable potentiometric response was obtained with azo dye at pH 6.5-4.0 and with DD, and Meyer reagent at pH 6.5-3.0. The best plasticizer was 49w/w% 2-nitrophenyl octyl ether for azo dye, and 65.3w/w% tri(n-butyl) citrate for DD and Meyer reagent. Potentiometric response slopes of optimized membrane electrodes based on SGY, LG, AR97, DD, and Meyer complex for verapamil were 52.49, 54.88, 50.81, 54.13 and 49.31 mV/dec., respectively. Lower limits of linear range were $1.0{\times}10^6M$ for SGY, LG, and AR97, while those for DD and Meyer reagent were $4{\times}10^{-6}M$. Detection limits for all these electrodes were $1{\times}10^{-5}M,\;4{\times}10^{-6}M,\;1.8{\times}10^{-6}M,\;8{\times}10^{-7}M,\;and\;1{\times}10^{-6}M$ with relative standard deviation of 2.56, 3.6, 3.96, 2.56, 3.20%, respectively.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.32 no.1
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• pp.13-21
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• 2004

• Communications for Statistical Applications and Methods
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• v.8 no.3
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• pp.859-866
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• 2001

The problem of wavelet density estimation is studied when the sample observations are contaminated with random noise. In this paper a linear wavelet estimator based on Meyer-type wavelets is shown to be L$_1$ strongly consistent for f(x) with bounded support when Fourier transform of random noise has polynomial descent or exponential descent.

• Journal of Ginseng Research
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• v.13 no.1
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• pp.1-4
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• 1989

Linoleic acid and ferulic acid were isolated from alkaline hydrolysate of a crude ginseng saponin fraction of Panax ginseng C.A. Meyer roots.

• Korean Journal of Logic
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• v.6 no.1
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• pp.19-32
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• 2003

In this paper we investigate the relevance logic E-R of the Entailment E without the reductio (R), and its extensions Ee-R, Eec-R: Ee-R is the E-R with the expansion (e) and Eec-R the Ee-R with the chain (c). We give completeness for each E-R, Ee-R, and Eec-R by using Routley-Meyer semantics.

• Toxicological Research
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• v.4 no.1
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• pp.13-22
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• 1988

The inhibitory effect of three polyacetylene compounds, panaxydol, panaxynol and panaxytriol isolated from Panax ginseng C.A. Meyer on $CCl_4$induced lipid peroxidation in vivo and in vitro hepatic microsomal lipid peroxidation induced by ADP-$Fe^{3+}$, NADPH and NADPH-cytochrome P-450 reductase were investigated. Their effects on lowering the lipid peroxide levels both in serum and liver and lowering the serum enzyme (GOT, GPT, LDH) activities without the $CCl_4$-induction were also determined. Male ICR mice were pretreated i.p. with polyacetylene compounds or DL-${\alpha}$-tocopherol before administration of $CCl_4$ i.p. and 20 hr after the administration of $CCl_4,$ serum and liver were analyzed. Hepatic microsome was isolated and used for the in vitro NADPH-dependent lipid peroxidation system. Except for panaxynol, treatment with polyacetylenes to control mice did not reduce the levels of lipid peroxides and serum enzyme activities. Panaxynol itself inhibited lipid peroxidation in the liver of normal mice. Polyacetylene compounds protected from the $CCl_4$-induced hepatic lipid peroxidation and lowered serum lipid peroxide levels. Polyacetylenes also inhibited the in virto hepatic microsomal lipid peroxidation in a dose-dependent manner. The results suggest that panaxydol, panaxynol and panaxytriol seem to be the antioxidant components which contribute the anti-aging activities of Panax ginseng C.A. Meyer.

• Journal of Plant Biology
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• v.35 no.2
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• pp.99-106
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• 1992

The endosperm protein, vicilin, of ginseng (Panax ginseng C.A. Meyer) was purified by ammonium sulfate precipitaion, gel permeation and ion exchange column chromatography. Vicilin is a glycoprotein composed of 2 subunits with molecular masses of 55,000 (large subunit) and 44,000 (small subunit). The anti-vicilin antibody was raised in rabbit, and purified by DEAE Affi-Gel Blue affinity chromatography. The endosperm cells of the seed were reacted with this anti-vicilin antibody and colloidal gold conjugated secondary antibody. Gold particles were labelled on the elaborating granules of Golgi complex, electron-dense granules and protein bodies in the endosperm cells. These results indicated that the vicilin, which was synthesized in rough endoplasmic reticulum and transported to Golgi, was elaborated in saccules of the Golgi and then transported into protein bodies by electron-dense granules.anules.

• Journal of Mechanical Science and Technology
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• v.18 no.3
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• pp.407-418
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• 2004

Prandtl-Meyer expansion flow with homogeneous condensation is investigated experimentally and by numerical computations. The steady and unsteady periodic behaviors of the diabatic shock wave due to the latent heat released by condensation are considered with a view of technical application to the condensing flow through steam turbine blade passages. A passive control method using a porous wall and cavity underneath is applied to control the diabatic shock wave. Two-dimensional, compressible Navier-Stokes with the nucleation rate equation are numerically solved using a third-order TVD (Total Variation Diminishing) finite difference scheme. The computational results reproduce the measured static pressure distributions in passive and no passive Prandtl-Meyer expansion flows with condensation. From both the experimental and computational results, it is found that the magnitude of steady diabatic shock wave can be considerably reduced by the present passive control method. For no passive control, it is found that the diabatic shock wave due to the heat released by condensation oscillates periodically with a frequency of 2.40㎑. This unsteady periodic motion of the diabatic shock wave can be completely suppressed using the present passive control method.

• Journal of the Korean Institute of Intelligent Systems
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• v.13 no.6
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• pp.704-709
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• 2003

The digital image can be distorted by a noise for a transmission or other elements of system. It happen to be vague of a boundary side in the division of an image object, especially, boundary side of an input image is very important because it can be determined to the division and detection element in pattern recognition. Therefore it is proposed an edge detection method of optimal to divide and detect exactly a boundary part. In this paper, it detected the optimal edge with applying this image to Meyer wavelet-CNN algorithm, after it does level up a boundary side of an image by using the adaptive morphology as the threshold of an input image. It confirmed that the proposed algorithm is more superior to the conventional methods and the conventional Sobel method which is an image edge detection algorithm. Especially, it is confirmed by simulation that the proposed algorithm can be got the better result edge at the place of closing to each edges and having smoothly curved line.

• Korean Journal of Logic
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• v.7 no.2
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• pp.105-120
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• 2004

In this paper, we provide Routley-Meyer semantics for the many-valued logics ${\L}C$ and LC, and give completeness for each of them. This result shows the following two: 1) Routley-Meyer semantics is very powerful in the sense that it can be used as the semantics for several sorts of logics, i.e., many-valued logic, not merely relevance logic and substructural logic. Note that each implication of ${\L}C$ and LC does not (partially) result in "paradoxes of material implication" 2) This implies that Routley-Meyer semantics can be also used not merely for relevance systems but also for other logical systems such as ${\L}C$ and LC, each of which has its own implication by which we can overcome (partially) the problem of "paradoxes of material implication".