• Korean Journal of Organic Agriculture
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• v.22 no.4
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• pp.705-718
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• 2014

This study was performed to evaluate the suppressive effects of organic fungicides made using environment-friendly materials on leaf spot disease and anthracnose that infect ginseng. Anthracnose (Colletotrichum gloeosporioides) and leaf spot disease (Alternaria panax) are principal diseases that decrease the yield of ginseng by defoliation before root enlargement. Fermented eggs and oyster shells, water extract of green tea and ethanol extract of red ginseng dregs were significantly effective in suppressing leaf spot disease. Fermented crab and shrimp shells and fermented motherwort were also effective in suppressing the recurrence of ginseng anthracnose. The preventive effects of these environment-friendly materials were definitely superior to the therapeutic effects. Therefore, these materials could be used as alternatives to chemical pesticides, which can not be applied in organic ginseng cultivation field. These organic fungicides need to be applied before the incidence of ginseng anthracnose in order to maximize their suppressive effects.

• Journal of the Society of Disaster Information
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• v.19 no.4
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• pp.747-756
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• 2023

Purpose: In this study, a grout material mixed using non-alkaline silica-based materials, which is an eco-friendly injection material to stabilize ground, is investigated to improve conventional problems. Method: The homogel specimens of Eco-Friendly Non-Alkaline Silica Sol (ENASS) and L.W. and S.G.R., representative silicate grouting are manufactured. Physicochemical and engineering properties of the specimens are evaluated in laboratory with uniaxial compression strength, hydraulic conductivity, shrinkage, chemical resistance, elution, fish poison, waste leaching. Result: Laboratory test results show that the ENASS was superior in all aspects compared to the existing injection matirial. The suitability of the grout material with ENASS is investigated with filed tests. Conclusion: The results of laboratory and field tests demonstrates that the grout material with ENASS is eco-friendly material that increases the strength, decreases the permeability, and discharges pollutants without leaching.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.35 no.3
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• pp.533-544
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• 2015

Unlike the concrete structure built on land, that exposed to the marine environment is greatly degraded in durability due to the exposure to not only the physical action caused by sea wind, tide, and wave, but also the harsh conditions, including the chemical erosion and freeze-thaw which result from $SO_4{^{2-}}$, $Cl^-$ and $Mg^{2+}$ ions in seawater. In the process of the large scaled construction of submerged concrete structures, of course environmental hazardous substance, such as alkaline (pH) and heavy metals, may be leached. Thus, this issue needs to be adequately reviewed and studied. Therefore, this study attempted to develop a CSA (Calcium Sulfo Aluminate) activator using electric arc furnace reducing slags, as well as the eco-friendly concrete for artificial reefs using electric arc furnace oxidizing slag as aggregate for concrete. The strength properties of the eco-friendly concrete exposed to the marine environment were lower than those of the normal concrete by curing 28 days. This suggest that additional studies are needed to improve the early strength of the eco-friendly concrete. With respect to seawater resistance of the eco-friendly concrete, the average strength loss against 1 year of curing days reached 8-9%. the eco-friendly concrete using high volume of ground granulated blast furnace slags and high specific gravity of electronic arc furnace oxidizing slag demonstrated the sufficient usability as a freeze-thaw resistant material. With respect to heavy metal leaching properties of the eco-friendly concrete, heavy metal substances were immobilized by chemical bonding in the curing process through the hydration of concrete. Thus, heavy metal substances were neither identified at or below environmental hazard criteria nor detected, suggesting that the eco-friendly concrete is safe in terms of leaching of hazardous substances.

• Journal of the Korean Applied Science and Technology
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• v.38 no.6
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• pp.1533-1542
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• 2021

Eco-friendly polyurethane can be defined as a highly utilized material used in various fields. The various structural properties of the synthesis of isocyanates and polyols provide versatility and customization for use in the manufacturing field. The characteristics of polyurethane vary widely from soft touch coatings to hard building materials like rocks. These mechanical, chemical and biological properties and ease of alignment are drawing tremendous attention not only in the field of research but also in related industries. In order to improve the performance of water-dispersible polyurethane materials, it can be derived through processes such as adjusting the blending of raw materials and adding additives and nanomaterials. This study highlights the basic chemical structure of eco-friendly water-dispersible polyurethane in the fields of medical science, automobiles, coatings, adhesives, paints, textiles, marine industries, wood composite materials, and clothing.

• 농업기술회보
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• v.51 no.3
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• pp.30-31
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• 2014

지구온난화에 대한 우려가 커지면서 농업분야에도 저탄소 녹색성장에 대한 필요성이 대두되고 친환경 유기 농산물에 대한 관심이 높아지고 있다. 이에 따라 화학비료 대신 녹비작물을 심어 잡초발생을 억제하는 새로운 농업기법이 확대되고 있다. 농촌진흥청에서는 녹비작물을 피복한 논에서 별도의 경운작업 없이 이앙할 부분만 경운과 동시에 이앙할 수 있는 부분경운이앙기를 개발하였다.

• The monthly packaging world
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• s.156
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• pp.140-146
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• 2006

(사)한국포장협회 코리아팩2006개최/도레이새한(주) 친환경 소재사업 진출/(주)지엠피 Thermalami 시스템 대안 제시/(주)지엠피 유상증자로 '경상흑자'추진/율촌화학(주) 생분해성 전분 용기 특허 취득/두산전자기기 DSM600-ST ST4출품/SKC(주) 플렉시블 필름 기술 세미나 개최

• 농업기술회보
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• v.48 no.2
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• pp.19-20
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• 2011

• THE HEALTH and ORGANIC FARMING
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• no.216
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• pp.11.1-11.1
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• 2005

2008 세계유기농대회 한국서 유치 추진 - 학교급식 유기농쌀 공급 '호응' - 7월1일부터 화학비료 보조금 전면페지 -미생물로 잡초를 제거한다?

• Environmental engineer
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• v.23 s.235
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• pp.34-35
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• 2006

• The Safety technology
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• no.194
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• pp.18-20
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• 2014

1960년대부터 국내 최고의 섬유회사 중 하나로 군림해오던 SK케미칼은 2000년대 접어들며 큰 변화를 시도했다. 보다 전문적인 화학분야로 사업구조를 개편하기 시작한 것이다. 적극적인 신규사업 발굴의 결과, '친환경 화학사업'과 '제약사업' 분야의 신흥강자로 올라섰다. 그리고 이 과정에서 SK케미칼은 '혁신'과 '도전'을 상징하는 기업으로 자리매김했다. 그런데 최근 SK케미칼을 지칭하는 또 하나의 수식어가 생겼다. 그것은 바로 '안전보건 우수 사업장'이다. 이 같은 영광을 얻게 된 데에는 울산공장의 공로가 컸다. SK케미칼 울산공장은 협력업체까지 아우르는 '공생안전보건관리'의 실천으로 여타 사업장의 모범이 되고 있다. 상생안전의 名家(명가)로 떠오른 이곳을 찾아가 봤다.