• Composites Research
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• 제22권6호
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• pp.52-62
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• 2009

본 논문은 최적의 방호력과 편의성, 착용감을 갖춘 지뢰 탐지 및 지뢰 제거용 방호복의 국내 기술현황을 분석, 정리한 내용이다. 경량방호 소재는 고강도 직물 및 부직포 소재의 적절한 적층 배열 구조로 구성되어 있어 전체적인 방호복의 중량과 두께를 줄임으로써 착용감을 향상시켜야 한다. 한편 방호복은 인체 부위별 치명상의 정도에 따라 방호성능을 보강하도록 구성함으로써 최대한의 방호성능을 갖추면서 활동성 및 착용감을 향상시켜야 한다. 특히 디자인에 있어서 탈착 및 부착이 용이하고, 부상 시 환자를 움직이지 않고도 인체로부터 방호복을 분리해 낼 수 있도록 고안하여야 한다. 이와 함께 고강도/초경량 하이브리드 방탄 재료 기술 현황에 관하여서도 간략히 기술하였다.

• 한국건축시공학회지
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• 제13권5호
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• pp.465-473
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• 2013

콘크리트는 충격 및 폭발에 대한 저항능력이 우수한 재료이지만, 국부적인 파괴가 발생하는 한계가 있다. 콘크리트의 방호성능 향상기법은 기존에는 부재의 두께를 증가시키는 것이었으나, 이는 공간의 활용에 있어 비효율 적이다. 최근에는 섬유보강 콘크리트는 콘크리트 자체의 휨인성을 증가시켜, 충격 및 폭발에 대한 저항능력을 향상시킨 방호재료의 개발 및 적용이 고려되고 있다. 본 연구에서는 섬유보강 콘크리트 및 모르타르에 대하여 고속 비상체의 충돌에 의한 내충격 성능을 평가하였으며, 그 결과를 바탕으로 방호벽으로 활용할 수 있는 콘크리트 T-wall을 제작하여 155 mm 포탄의 파편에 대한 방호성능을 검토하였다. 그 결과, 섬유보강으로 인한 휨 인성의 향상은 고속 비상체의 충돌에 의한 배면박리를 억제하는 것으로 나타났으며 155 mm 포탄의 파편 충돌에 있어 배면균열 및 표면의 콘크리트의 박락 등이 억제되어 섬유보강으로 인하여 방호벽의 성능 향상 및 부재두께를 감소할 수 있을 것으로 판단된다.

• 한국지역사회생활과학회지
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• 제27권4호
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• pp.891-906
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• 2016

This study examined the working site environment of Korean native cattle raising farmers and their actual condition of wearing personal protective equipment as part of preventing disasters during agricultural work. To this end, 160 Korean cattle raising farmers were surveyed and a site visit was performed on 10 farms. According to an examination of the cattle breeding environment, the major harmful factors were in the following order: fine dust (12.8%), organic feed dust (10.3%), contact with cattle (9.7%), manure (8.2%), germs and viruses (8.1%), harmful gases (7.4), contact with obstacles (6.7), and temperature (6.6%). The current status of the rate of wearing protection was in the order of gloves (20.9%), working hats (19.7%), boots (19.6%), masks (10.9%), protective clothing (8.9%), and specialized working clothing (6.6%). Nevertheless, most Korean cattle raising farmers recognized the risks when they did not wear protective equipment and the need for wearing protectors, but they mostly did not wear personal protective equipment due to a lack of knowledge on the selection of appropriate personal protective equipment and the discomfort they experience when they put on protectors. Even when they put on protective equipment, 38% was inappropriate for the farming work environment. Given the research results, improvements on and the development of specialized working clothing and personal protective equipment to protect farmers from harmful and dangerous materials from the cattle nurturing environment is necessary. Overall, based on the study data, objectified data collection, a determination of the necessary performance elements of personal protective equipment, and R&D will be needed through an on-site current status investigation.

• 한국환경농학회지
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• 제35권4호
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• pp.263-269
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• 2016

본 연구에서는 방제복의 액체침투저항성을 측정하는 방법 중 피펫법을 적용하여 국내 시판중인 5종의 방제복과 일반 shirt에 대해서 체류성, 발수성 그리고 침투성을 측정하였다. ISO 22608 Guideline 'Liquid penetration resistance-Pipette test'에서 요구하는 장치를 사용하였고 시험농약으로는 pendimethalin을 처리하여 GC/MS로 분석하였다. 5종의 방제복은 침투성이 0.0~5.4%로 매우 낮은 침투성을 보였으며 발수성은 67.0~98.1%로 농약이 쉽게 투과되지 않고 물 또는 액체에 의해서 제거될 수 있을 것으로 보였지만, 일반 shirt는 높은 침투성과 낮은 발수성이 확인되어 농약살포 시 손쉽게 피부에 노출될 수 있을 것으로 확인되었다. 현재 국내에서는 방제복에 대한 침투저항성 측정법과 기준이 마련되어 있지 않기 때문에, 본 연구는 방제복의 성능측정의 기준시험법 마련에 도움을 줄 수 있을 것으로 사료된다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 하계학술대회 논문집
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• pp.890-893
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• 2001

Two-layer self bonding insulating tape consists of butyl rubber(IIR ; Isobutylene-isoprene rubber) adhesive layer and polyethylene protective film. Butyl rubber have inherent characteristics such as resistance to corrosion and water, low temperature flexibility, excellent electrical insulating properties also resistance to environmental effect such as ozone and ultraviolet. Polyethylene film was used for the purpose of good insulating properties and resistance to ozone and ultraviolet. The tape was manufactured using extrusion and calender method.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
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• pp.657-658
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• 2005

Flame retard of polymers was studied for prevention from burning by various additives stimulated the char formation during heating and thermal degradation of polymer materials. Forming char have high porosity, low thermal conductivity and act as thermal shield for heat transmission from the flame to the polymer and. oxygen towards the polymer. The results showed that various additives may regulate the processes of intumecsence. The efficient fire protective intumescent char was result of processes of melting, gas evolution, cross-linking, carbonization etc.

• Journal of Microbiology and Biotechnology
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• 제28권1호
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• pp.40-49
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• 2018

We evaluated the antioxidant activity and neuronal cell-protective effect of fucoidan extract from Ecklonia cava (FEC) on hydrogen peroxide ($H_2O_2$)-induced cytotoxicity in PC-12 and MC-IXC cells to assess its protective effect against oxidative stress. Antioxidant activities were examined using the ABTS radical scavenging activity and malondialdehyde-inhibitory effect, and the results showed that FEC had significant antioxidant activity. Intracellular ROS contents and neuronal cell viability were investigated using the DCF-DA assay and MTT reduction assay. FEC also showed remarkable neuronal cell-protective effect compared with vitamin C as a positive control for both $H_2O_2$-treated PC-12 and MC-IXC cells. Based on the neuronal cell-protective effects, mitochondrial function was analyzed in PC-12 cells, and FEC significantly restored mitochondrial damage by increasing the mitochondrial membrane potential (${\Delta}{\Psi}m$) and ATP levels and regulating mitochondrial-mediated proteins (p-AMPK and BAX). Finally, the inhibitory effects against acetylcholinesterase (AChE), which is a critical hydrolyzing enzyme of the neurotransmitter acetylcholine in the cholinergic system, were investigated ($IC_{50}$ value = 1.3 mg/ml) and showed a mixed (competitive and noncompetitive) pattern of inhibition. Our findings suggest that FEC may be used as a potential material for alleviating oxidative stress-induced neuronal damage by regulating mitochondrial function and AChE inhibition.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2009년도 춘계학술대회 논문집
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• pp.929-930
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• 2009

• Biotechnology and Bioprocess Engineering:BBE
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• 제11권5호
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• pp.391-395
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• 2006

Microcapsules containing fragrant oils as a core material were prepared by in situ polymerization, using melamine-formaldehyde prepolymer as the wall material. The several parameters, such as stirring times, stirring rates, emulsifier types, emulsifier concentrations, and the viscosity of the core materials, affect the characteristics of the microcapsules. These parameters were investigated by the analyses of microcapsule size, particle size distribution, and morphology. The average microcapsule size decreased with an increase in stirring time, stirring rate, emulsifier concentration, and viscosity of the core material. It was also found that poly(vinyl alcohol) as a protective colloid could enhance the stability of the melamine-formaldehyde microcapsules.

• 한국산업보건학회지
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• 제11권3호
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• pp.179-189
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• 2001

This study was performed to identify the current status of work environment management and to provide appropriate recommendations for small scale industry with less than 5 workers from September, 2000 to October, 2000 in Seoul city and Gyoung-gi province. The 211 companies were surveyed by checklist included the elements of management of work environment, hazardous chemicals, MSDS, personal protective equipment, and ventilation system. The proportion of metal products manufacturing and printing industries are 25.6 % and 22.3%, respectively. The daily working hours in printing industry is longer than others. The industries that produce potentially hazardous agents, such as noise, dust, metal, organic solvents, radiation and chemical material are pulp, plating, machinery, and printing, respectively. In above industries, only 2.8 % of those recognised and had MSDS. The proportion of companies providing fire extinguishers, safety showers are found to be 13.3 %, 7.1 %, respectively. Only 24.2 % of companies provided personal protective equipment to the workers. The ventilation system was operated in most of companies. But local exhaust ventilation system is provided to 22.3 % of those, also had not been annually inspected. This study showed that the current status of occupational safety and health was not appropriate for workers in small scale industries. It is suggested that annual physical examination have to be performed, MSDS usage must become widespread, and employer and emplyees in small scale industry should be educated for the treatment and storage of hazardous chemicals to improve the occupational safety and health of the working environment. also, regulatory standard has to be applied to local exhaust ventilation system in small scale industry to improve the working condition.