• 한국지역사회생활과학회지
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• 제20권2호
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• pp.181-191
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• 2009

This study was conducted to examine the distribution status, the physicochemical composition, and the physiological activity of Spergularia marina grown in the western region in Jeon-Ra-Nam-Do, looking for its potential as a local specialty goods. The amount sold of Spergularia marina to different areas from a rural market place was examined during April, 2008. The proportions of Spergularia marina are as follows; Yeongam(30.5%), Muan(24.3%), Naju(20.3%), Hampyeong(18.0%), and Haenam(7.0%), which were shown higher than those of Pimpinella brachycarpa. Total vitamin C and total chlorophyll contents in Spergularia marina were 68.61mg/100g DW and 58.11mg/g DW, respectively. Total amino acid contents were 331.94mg/100g DW and 20 kinds of amino acids were separated and classified. The contents of inorganic matters in Spergularia marina were as follows; Na(64.23mg/L), Mg(15.88mg/L) K(9.99mg/L), Ca(3.83mg/L). The total phenol and the total flavonoid contents of methanol extracts from Spergularia marina were 41.7mg/L and 18.9mg/L, respectively, with an extracting concentration of 2,000mg/L. The nitrite scavenging activity was highest (83.4%) in hot water extract. These results may be useful as basic data for using Spergularia marina as a local specialty goods.

• 보존과학회지
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• 제25권2호
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• pp.197-206
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• 2009

천연보존제는 주로 식물에서 추출된 항균물질로 만들어지며 부패되기 쉬운 식품의 보존제나 천연화장품, 약품등에 주로 사용되고 있다. 본 연구는 현재 천연화장품의 보존제로 개발되어진 천연보존제를 직물에 처리하여 이것이 섬유문화재 보존에 적용이 가능한지를 탐색하고 평가하는데 그 목적이 있다. 따라서 천연보존제로 처리한 직물의 특성을 알아보고자 천연보존제 1%로 처리한 면직물과 견직물에 대해 실험한 결과 색 및 인장강도의 변화가 극히 미약하고 중성에 가까운 pH를 나타내었으며 우수한 항균성과 항곰팡이성을 가지는 것으로 나타났고 견직물에 피해를 주는 Bacillus cereus에 대해서도 우수한 항균활성을 나타내었다. 또한 섬유문화재에 적용시키기 위한 예비실험으로 출토직물 편을 천연보존제 1%로 처리한 직물로 싸서 72시간 보관한 후 출토직물편의 미생물 실험결과 미생물의 증식이 확연히 준것을 알 수 있었다.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2009년도 학술발표회 초록집
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• pp.2078-2082
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• 2009

Riparian vegetation distribution patterns and diversity relative to various fluvial geomorphic channel patterns, stream bank stabilization methods, and stream flow processes are described and interpreted for selected stream of Goesan, Central Korea. Idong Stream Pilot Project, which began in May 2003 and finished in December 2003, was selected to develop effective methods. The project aim to maintain or increase stream bank stabilization ecosystem goods and services while protecting downstream and stream bank ecosystem. A number of protecting methods which are a Flight of fieldstone, Vegetation block, Green river block, Stone net, Green environment block, Eco friendly cobble, Vegetation mat and Geo green cell and Firefly block were applied on the bank of Idong stream. The stream sites have been monitored about flora conditions each method in 2007. We selected 12 points for summer seasons to separately investigate in left bank, right bank and river bed. The main purpose of this study was to find out suitable methods and to improve stream restoration techniques for ecosystem. On the stream bank, Eco friendly cobble method(9.57) was the highest average of vegetation cover and Firefly block method(3.87) was the lowest average in applied methods.

• 환경위생공학
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• 제15권3호
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• pp.120-127
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• 2000

To facilitate the carriage of goods and products, an improvement of the transportation system is greatly needed in Korea. The construction of the Kyung Bu canal that can traverse over the wide area of southern Korea os proposed to be one of the most favorable choices to resolve this need. To fulfill this plan, we investigated the possibility of connecting the Han River (in the midwest) with the Nak-tong River (in the southeast) via the Cho-ryeong tunnel (20.5 km long and 125 m high). According to topographic and geological mapping analysis, we are capable of selecting the optimal locations for the tunnels and locking systems. The water requirement for high locking systems can be satisfied by constructing additional dams above the Choong-ju area or by introducing water saving lock system. The results of our investigation support the idea such a canal system, if constructed, could lead to a revolution of the Korea's transportation system.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2008년도 제30회 춘계학술대회논문집
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• pp.31-35
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• 2008

여러 가지 목적으로 제작되는 고체 추진기관은 사용 가능한 기간이 정해져 있어 그 용도에 따라 사용되지 않은 한 적절한 방법으로 폐기 처리 되어야 한다. 또한 제작 과정 중 발생하는 불량 탄 역시 적절한 방법으로 폐기 되어야 한다. 과거에는 야외에서 소각하거나 폭파하는 방법이 일반적이었으나 최근 환경오염 문제가 대두되어 이를 해결하기 위한 대안이 필요하여 해외에서는 이미 1970년대부터 관련 기술이 개발되어 상용화 하고 있다. 따라서, 본 논문에서는 Water Jet을 이용한 비군사화 관련 해외 동향 및 국내 개발 현황에 대하여 논하고자 한다.

• 한국관개배수논문집
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• 제17권2호
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• pp.71-81
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• 2010

Stream Pilot Project, which began in May 2003 and finished in December 2003, was selected to develop effective methods applicable to nature-like streams. Stream restoration projects aim to maintain or increase ecosystem goods and services while protecting downstream and coastal ecosystems. Fields environmental monitoring such as flow discharge and precipitation were conducted along the Idong stream for amount of channel zone change in 2007. This study selected three monitoring positions to measure the water level and discharge of flowing water. A stage-discharge relation is obtained from direct discharge measurements for three stations by fitting an empirical relationship to the data set. Since discharge measures are made only for low flow conditions, a curve of discharge against stage can then be built by fitting these data with a power curve. And this study used data obtained from floodmark checkup as well as HEC-RAS model to analyze the hydrodynamic characteristics of monitoring sites. Reach-averaged hydraulic parameters for the supply reach were calculated from the small area's HEC-RAS model for Idong stream, and a HEC-RAS model used to analyze hydraulics for a period in 2007, after the stream was considered bank stabilization.

• 한국의류학회지
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• 제31권7호
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• pp.1119-1127
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• 2007

Nonwovens have been widely used in various regions from the households to the industrial, agricultural and medical goods. Synthetic fibers have been used for source of nonwovens commonly because of their useful and economic properties. They are not only main factor causing environmental problems but also spend huge cost to renew the environmental disruption by them. Nonwovens must have both cost-competitiveness and environment-friendly property to be the desirable sources in 21th centuries. For meet these needs, it is suitable for the times that economical and environmentally-safe kenaf fibers would be used as raw materials of nonwovens. Kenaf and polyester fibers were blended in 4 types of ratio : 0/100, 20/80, 40/60, 60/40 were needle-punched. The nonwovens properties such as color values, surface appearance, strength, elongations, stiffness, moisture regain, water and oil absorbency, and electrification were tested. As the results, tensile and tear strengths, water and oil absorbency were maximum at 20/80 kenaf/polyester blend nonwoven, because of effecting by nonwoven structure and fiber properties. The moisture regain were increased according to kenaf were blended and the eletrification reduced in proportion to the kenaf fibers by chemical property of fiber composed nonwovens.

• 한국의류학회지
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• 제46권1호
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• pp.132-146
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• 2022

To explore the potential use of Ecklonia cava as a natural dye for textiles, silk fabric was dyed with Ecklonia cava extracted by hot water under varied conditions, including temperature, duration, dye concentration, mordanting, and pH adjustment. The fabric was also evaluated for fastness, sun-protective property, and deodorization. Ecklonia cava extract was estimated by FT-IR to have polyphenol as a main functional colorant in plants, while the existence of phlorotannins through the UV-spectrum method was also confirmed. The fabric was optimized for maximum dye uptake at a temperature of 80℃ for a duration of 50 minutes along all dye concentrations. The dyed fabric showed a hue of Yellow Red under all dyeing conditions while additional color tones, such as grayish and dark, were generated through mordanting and pH adjustment. Both good sun-protective properties and a positive deodorization rate were also recorded, with more than 20% (owf) Ecklonia cava extract on silk fabric. These results imply that Ecklonia cava has great potential to be used as an eco-friendly natural dye and in fashion goods with skin-health functions made of silk.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 봄 학술논문 발표대회
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• pp.98-99
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• 2021

The number of fires in the Korean distribution warehouse increased by about 350 from 1,070 in 2014 to 1,416 in 2020. In addition, the fire load increases with the scale of the distribution warehouse, and even if the automatic sprinkler operates, there is a limit to the direct intrusion of the water source into the ignition source, and the detector is often installed on a high ceiling. The sensing time is often delayed. In order to improve the fire safety of such distribution warehouses, the US NFPA stipulates in detail the contents related to the facility, such as sprinkler water discharge standards, rack-type warehouse installation height restrictions, and regulations on collection and equipment. However, in Japan, the goods loaded inside the distribution warehouse are not classified in detail, and it is considered that the fire safety for the distribution warehouse is low due to the relaxation regulations of the fire prevention section. Therefore, in this study, common problems are classified into material, spatial, and safety management characteristics through the cases of distribution warehouse fires that occurred in Korea and abroad, and the problems related to distribution warehouses in Korea and abroad are compared and analyzed. And present basic materials for improving the life safety standards of future distribution warehouse facilities.

• 공업화학
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• 제4권3호
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• pp.558-563
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• 1993

합성세제가 수질오염에 미치는 영향을 규명하기 위한 기초과정으로서 시판 주방용세제 3종을 대상으로 하여 1차적 생분해도와 최종적 생분해도를 측정하였다. 그 결과 대상시료의 1차적 생분해도는 한국공업규격(KS) 기준에 적합하였다. 그중에서도 1차적 생분해도가 빠른 제품이 최종적 생분해가 빠른 경향을 보였다.