• Proceedings of the Korean Institute of Building Construction Conference
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• 2014.11a
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• pp.36-37
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• 2014

Construction work in island areas requires the materials to be transported by ship and plane, and it causes an increase in the construction costs. In addition, the construction work near marine zones may produce the marine pollution due to the harmful substances in the cement. Recently, nature-friendly construction materials are increasingly used, and there is a need to select and develop appropriate construction materials. In this study, the compressive strength, tensile strength, flow and chloride content of the mortar mixed with cement and muddy tidal flat were measured to reduce the amount of cement by applying the natural materials, muddy tidal flat and marine sand, and the results were provided as the basic construction material data.

• Journal of Advanced Marine Engineering and Technology
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• v.18 no.4
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• pp.13-24
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• 1994

The demand of clean energy, like liquefied gas(LNG), increase suddenly because it generates few polluting substances when burned and from the point of view with caloric value it generates ralatively less $CO_2$ gas than the other energy sources. LNG transpotion method of our country is marine transportion by ships because the LNG producing district is far away from Korea. Main engines for most LNG ships are steam turbines, and the efficiency of steam turbine is influenced by the degree of vacuum of main steam condenser. This paper introduce the design method of the vacuum system for high efficiency marine steam turbine. Especially, it is developed the CAD program for the large steam condenser and steam ejector. Also, it is designed the pilot plant including high pressure boiler for the performance test and maked a part of this plant.

• Archives of Pharmacal Research
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• v.9 no.2
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• pp.115-117
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• 1986

Some coumarins were sythesized for the screening of their cytotoxic activities against L1210 cell. Of the conmarins sythesized, 6, 7-dihydroxycoumarin (esculetin) and 7, 8-dihydroxycoumain (dephnetin) as coumarins with dioxygenated A-ring, and 6-acetoxy-5, 7-dimethoxycoumarin and5, 7-dimethoxy-6-hydroxycoumarin as trioxygenated ones, show considerable cytotoxic activities, ED 50 being 4. 3, 8. 8, 17.2 and 5.5 $\mu$g/ml in the same other as the substances. THe extent oxygenation of the A-ring and the positions of the oxygen functions eventually play an important role for the cytotoxic activity.

• Archives of Pharmacal Research
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• v.22 no.6
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• pp.559-564
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• 1999

In order to discover new cancer chemopreventive agents from natural or synthetic products, a structurally diverse class of chemopreventive agents was evaluated using in vitro biomarker of inhibition of 12-O-tetradecanoylphorbol 13-acetate (TPA)-induced ornithine decarboxylase (ODC) activity in cultured mouse epidermal 308 (ME)308 cells. As a results, apigenin, benzylisothiocyanate, curcumin, diallyl disulfide, N-(4-hydroxyphenyl)retinamide (4-HPR), menadione, miconazole, nordihydroguaiaretic acid (NDGA) and phenethyl isothiocyanate showed potent inhibitory effects in this process. A chemically diverse group of compounds was included in the evaluation, such as flavonoids, retinoids, isothiocyanates, sulfur-containing compounds and phenolic antioxidant compounds. These data are suggestive to understand the cancer chemopreventive potential mediated by these substances.

• Proceedings of the Korean Institute of Landscape Architecture Conference
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• 2007.10b
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• pp.84-88
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• 2007

When people recognize a landscape, they first need to see it for a definite period time. This study clarified the way green space in a landscape is recognized using eye movement analysis, and evaluated the Pffi9bility for quantifying stress-reducing effects of seeing a landscape. The results of the experiments on eye movement analysis suggest that the way of recognizing green space in a landscape may depend on a ratio of the amount of scenic greenery in a landscape, color and greenery layout. Especially, this study also suggests that the possibility of the greenery layout guiding eye movement could be verified by conducting a study on planting patterns. In addition, the results of the experiments for quantifying stress-reducing substances found that it is likely that a green space in an urban area has stress-reducing effects.

• Journal of the Korea Furniture Society
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• v.23 no.4
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• pp.355-363
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• 2012

From the end of the 20th century, there has been increased interest for life Well-Being and LOHAS. Attracting the interest of consumers for eco-friendly materials, the furniture in the finish of the interior space of interest. In the finish of the interior space and living furniture, eco-friendly materials and the process of development and research has led to a surface treatment for reducing hazardous substances. By a combination of natural materials and the latest eco-friendly rating, recognized in LPM (Low Pressure Melamine) has been developed. LPM was used birch and eco-friendly materials, the development of student furniture can be expanded depending on the growth.

• Natural Product Sciences
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• v.13 no.4
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• pp.369-372
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• 2007

Oxidative stress induced by reactive oxygen species (ROS) has been suggested to be the cause of various degenerative diseases as well as aging. To evaluate the antioxidant potential of stilbenes, we have investigated the cytoprotective effect of 10 stilbenes derived from plants on the oxidative stress induced by tertiary butyl hydroperoxide (t-BuOOH). Of the stilbenes tested, piceatannol (3) showed the most potent activity, which was further investigated using an animal model. When 3 (30 or 10 mg/kg) was topically administered prior to UVB irradiation, the amount of the thiobarbituric acid reactive substances (TBARS) was significantly reduced compared to that of the control (vehicle). Our findings suggest that piceatannol is capable of protecting cells and tissues from oxidative stress.

• Korean Journal of Pharmacognosy
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• v.9 no.1
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• pp.1-9
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• 1978

The principle of Fourier Transform Nuclear Magnetic Resonance and its usefulness in the fields of pharmacy and biological sciences are described. 1. The $^1H\;and\;^{13}C$ NMR spectra of triostin A and its mixture with purine derivatives were taken. From the analysis of the spectra it has established that triostin A, which exists in two symmetric conformers in chloroform solution, forms complexes only with purine derivatives by the participation of one of the conformers. 2. Also, the $^{13}C$ NMR spectra of "intact" substances in the field of pharmacognosy were taken. From the spectra it was suggested that the method is very useful for natural product research in cooperation with the chemical method.

• Korean Journal of Soil Science and Fertilizer
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• v.44 no.6
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• pp.1264-1271
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• 2011

To build environmentally friendly highways, we testes suitability for unique characteristics of pollution mitigation facility around the highways by evaluating optimal selections and implementation methodologies to minimize loan of non-point pollution substances into water-ways. To do this we categorized EIA target highways into three types ; big drainage basin, small drainage basin, and bridge section as to minimize non-point pollution of highway runoff. The terms of selected facility test based on the Natural and Manufactured Treatment Device were removal efficiency of TSS, BOD, COD, T-N, T-P, compatibility of site selection, economic feasibility, maintenance convenience, and the final mitigation facility.

• Journal of Radiation Industry
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• v.12 no.4
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• pp.291-295
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• 2018

The purpose of this study was to introduce the radiography for the natural course and clinical diagnosis of foreign body ingestion and aspiration, to help diagnosis and treatment, to evaluate the accuracy of radiographic images of pediatric patients. A 2 to 7 year-old patient who ingested a foreign body was ingested and aspirated with foreign substances such as coin, cloth pin, earring, baduk stone, and hairpins, and chest and abdomen of the plain radiography. The pediatric patient who ingested and aspirated the foreign body of the coins, the clothespins, the earrings, the stones, and the hairpins were examined by chest and abdomen of the plain radiography and fluoroscopic images. The radiography examination can be combined to effectively cope with the treatment and the treatment of the foreign substance removal. It can be applied to the diagnosis of foreign body in pediatric patient's clinic and appropriate treatment and treatment direction.