• Proceedings of the PSK Conference
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• 2002.10a
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• pp.259.2-259.2
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• 2002

The purpose of the present study was to determine the effects of platycodin D and D3 on the contractile force of the isolated rat aorta and blood pressure of the anesthetized rat. and also to establish the mechanism of action. The phenylephrine (10 $\mu$M)-induced contractile responses were greatly inhibited in the presence of platycodin D (4 ∼ 24 $\mu$g/$m\ell$) in a dose-dependent fashion. (omitted)

• Archives of Pharmacal Research
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• v.29 no.9
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• pp.800-807
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• 2006

This study examined the possibility of using a tissue cultured root of wild Panax ginseng (tcwPG) as a fertility agent. The effect of tcwPG on spermatogenesis was studied using male rats. The tcwPG crude powder was administered orally to 7-week-old rats over a 6-week period. The number of sperm in the testes and epididymides was significantly higher than the control. A histological examination did not reveal any morphological changes in the testes from the tcwPG powder treated rats. Moreover, there were no significant differences in the weights of the heart, spleen, liver, kidney, brain, testes and epididymides. Oligospermia was also induced by administering 2,3,7,8-tetrachlorodaibenzo-p-dioxin (TCDD) to the rats in order to estimate the feasibility of using tcwPG as treatment for infertility caused by spermatogenic disorders. After exposing the rats to TCDD, the tcwPG saponin fraction treated rats showed some improvement in the body weight, sperm number and testis morphology. It was estimated that tcwPG had feasibility as a therapeutic agent on spermatogenic disorder.

• Journal of Ship and Ocean Technology
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• v.11 no.2
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• pp.26-33
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• 2007

For the assessment of the retardation of fatigue crack propagation behavior due to overload, new FE analysis algorithms considering compressive residual stress redistribution near crack tip was proposed in this paper. The size of plastic zone near crack tip was obtained by elasto-plastic analysis and it was compared with Irwin's equation. The amount of residual stress redistribution was assessed by subsequent elasto-plastic analysis, and the difference of residual stress distributions between constant amplitude load and overload was obtained. In the analysis of fatigue crack propagation, the applied SIF range was evaluated by ASTM E647, and the effect of residual stresses on crack propagation was considered using the effective SIF concept. The test results of crack propagations were compared with the predicted data obtained by the analysis.

• Korean Journal of Food Science and Technology
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• v.44 no.5
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• pp.503-525
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• 2012

Consumers are increasingly concerned about the origin of foods, so the geographical origin of foods has been a major topic of debate and extensive research. Various instrumental methods (e.g. high performance liquid chromatography (HPLC), gas chromatography (GC), capillary electrophoresis (CE), electronic nose, near-infrared spectroscopy (NIRS), nuclear magnetic resonance spectroscopy (NMR), DNA analysis, multi-isotope analysis) in conjunction with statistical analysis, were developed and applied in attempt to provide reliable answers to their geographical origin. This study reviews current developments in the application of various methods for a clear geographical origin of foods. The limitation of discrimination analysis for geographical origin was also discussed.

• The Korean Journal of Ecology
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• v.14 no.4
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• pp.361-370
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• 1991

The cone and seed production of pitch pine were investigated at two areas(songtan and yangdong) located in kyounggi province. Bymeans of formulas derived from both the regression analysis between the number of seeds and cone length, and between d2·h and number of cones, cone and seed production were estimated. The correlation coefficient value between the number of seeds and cone length was high(r=0.6134). The cone and seed production of pitch pine has a high relationship to the variables-dbh, tree aga , and height of tree. The cone production of pitchpine forest estimated by the formula log(o+s+y+c)=0.581 log(d2·h)-1.317 was 965,832/ha in 1985∼1986, 850,852/ha in 1986∼1987 at songtan, and 462,794/ha in 1985∼1986,916,965/ha in 1986∼1987 at yangdong.

• Journal of Korean Neurosurgical Society
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• v.58 no.4
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• pp.393-396
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• 2015

Bullet injuries to the spine may cause injury to the anatomical structures with or without neurologic deterioration. Most bullet injuries are acute, resulting from direct injury. However, in rare cases, delayed injury may occur, resulting in claudication. We report a case of intradural bullet at the L3-4 level with radiculopathy in a 30-year-old male. After surgical removal, radicular and claudicating pain were improved significantly, and motor power of the right leg also improved. We report the case of intradural bullet, which resulted in delayed radiculopathy.

• Korean Journal of Pharmacognosy
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• v.31 no.1
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• pp.1-6
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• 2000

Five compounds were isolated from the methanol extract of the tubers of Cyperus rotundus (Cyperaceae). They were identified as cyperol(1), ${\alpha}-cyperone(2)$, cyperotundone(3), sugetriol triacetate(4) and ${\beta}-sitosterol(5)$ on the basis of spectroscopic and physicochemical analysis. Among them, cyperol, ${\alpha}-cyperone$ and cyperotundone were shown inhibitroy effects on LPS-induced nitric oxide production in RAW 264.7 cells in a dose dependent manner.

• International Journal of Safety
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• v.6 no.2
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• pp.43-48
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• 2007

We introduced the Excavation One Call System (EOCS) as a pilot system, in Seoul, Korea. The system utilizes the phone and internet to transfer information about digging underground and buried gas pipelines, although currently written forms are used in accordance with the City Gas Business Law. After one year, we evaluated the business model by surveying the excavators and the operators of the gas companies. This paper shows that the EOCS was more effective in preventing the buried gas pipelines from being damaged than the existing method that has to use due form. It also shows that the EOCS was more convenient and cost efficient than the present policies in place. We come to the conclusion that the EOCS should be extended nationwide and gradually include other subsurface facilities.

• Journal of Digital Contents Society
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• v.3 no.2
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• pp.177-185
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• 2002

E-Business part is activated to base on contents for supports various constomer's desire. That is, techniqueses for efficient business transaction processing are studied and Web-Based component technology such as EJB is applied. Thus, this research designed Wokeflow for efficient E-Business contents supervision and processing that apply Web-Based EJB component technology. Accordingly, 1 used web server component model EJB for handling of various contents. Components of function module can improve system development efficiency of reusability, maintenance etc.. to process various contents.

• Journal of Environmental Science International
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• v.21 no.6
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• pp.749-755
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• 2012

The effect of elevation and meteorological elements is analyzed in Jeju Island for analysis of evapotranspiration with two different height observation station during 3 years data. The slope of temperature gradient recorded $1.30^{\circ}C$/100 m from the analysis of temperature data. There is much difference evapotranspiration between low elevation and high elevation station because of decrease solar radiation and wind speed with height increase. The evapotranspiration is observed by mini lysimeter at Hankukgonghang. The result of observation is presented 34.2% of global solar radiation changed into evapotranspiration during 4 clear days.