• Research in Plant Disease
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• v.29 no.2
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• pp.158-167
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• 2023

Black rot of Chinese cabbage caused by Xanthomonas campestris pv. campestris (Xcc) is one of the most severe diseases in crop cultivation. To define the resistance characteristics of Chinese cabbage to Xcc, we tested the virulence of eight Xcc isolates in four susceptible cultivars of Chinese cabbage. The isolates of Xcc showed different the virulence on the cultivars. On the other hand, we selected 22 resistant or moderately resistant cultivars of Chinese cabbage to Xcc and tested the occurrence of black rot on the cultivars caused by the isolates of Xcc. Mean disease severity of black rot on the Chinese cabbage caused by each isolate was also positively correlated with the virulence of Xcc isolates. Furthermore, the development of black rot in each cultivar increased according to virulence of Xcc isolates. The number of resistant cultivars of Chinese cabbage to eight isolates of Xcc decreased according to the virulence increase of bacteria. Taken together, these results suggest that resistance of Chinese cabbage cultivars to Xcc is likely affected by the virulence of Xcc isolates, but not result from race differentiation.

• Journal of Animal Science and Technology
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• v.61 no.6
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• pp.388-388
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• 2019

• The Plant Pathology Journal
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• v.33 no.5
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• pp.488-498
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• 2017

The aim of this study was to identify volatile and agardiffusible antifungal metabolites produced by Bacillus sp. G341 with strong antifungal activity against various phytopathogenic fungi. Strain G341 isolated from four-year-old roots of Korean ginseng with rot symptoms was identified as Bacillus velezensis based on 16S rDNA and gyrA sequences. Strain G341 inhibited mycelial growth of all phytopathogenic fungi tested. In vivo experiment results revealed that n-butanol extract of fermentation broth effectively controlled the development of rice sheath blight, tomato gray mold, tomato late blight, wheat leaf rust, barley powdery mildew, and red pepper anthracnose. Two antifungal compounds were isolated from strain G341 and identified as bacillomycin L and fengycin A by MS/MS analysis. Moreover, volatile compounds emitted from strain G341 were found to be able to inhibit mycelial growth of various phytopathogenic fungi. Based on volatile compound profiles of strain G341 obtained through headspace collection and analysis on GC-MS, dimethylsulfoxide, 1-butanol, and 3-hydroxy-2-butanone (acetoin) were identified. Taken together, these results suggest that B. valezensis G341 can be used as a biocontrol agent for various plant diseases caused by phytopathogenic fungi.

• Journal of the Korean Society of Propulsion Engineers
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• v.21 no.2
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• pp.26-31
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• 2017

Environmental problem of the solid propellants is an issue of growing importance in solid rocket. For examples, ammonium perchlorate (AP) as an solid propellants oxidizer could create a poisonous gas and atmospheric pollutions, such as HCl. Among the several oxidizers, N-guanylurea dinitramide (GuDN) is an effective candidate substance for eco-friendly oxidizer, which has high performance, pressure exponent, and eco-friendly smog during combustion for solid propellant of gas generator. In this paper, the theoretical analysis of characteristics as a gas generator propellant, propellant manufacturing processability, propellant hardness properties and combustion characteristics were studied.

• Journal of Agricultural Extension & Community Development
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• v.18 no.4
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• pp.961-981
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• 2011

This study selected Joongchon Village in Gimje-si as a target, in order to apply green village design regarding regional circumstances and features within the local government, in making green village as an efficient scheme in aspect of locality for 'Low Carbon, Green Growth'. Subsequently, we conducted survey and analysis. Natural circulation-based green village of Joongchon Village in Gimje-si is a low carbon green village, based upon eco-friendly cattle shed. Even though it is the fact that the initial costs of an eco-friendly cattle shed are rather high, it is the long-term low carbon green technology that can transform livestock night soils into resources, provide them to agricultural farms, independently supply energies from by-product, and produce energies additionally. Therefore, Joongchon Village in Gimje-si is the good example of green village, applying the design which actively utilizes discharged by-product from cattle shed, so natural circulation and energy production are able as an eco-friendly green technology.

• International Journal of Advanced Culture Technology
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• v.12 no.1
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• pp.281-286
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• 2024

With the commercialization and full-timeization of the livestock industry, civil complaints continue to increase, and the livestock industry is facing a crisis due to social problems such as odor caused by livestock manure, soil pollution, water pollution, and environmental pollution. In order to increase productivity in livestock farms, the amount of livestock manure generated is increasing due to excessive use of protein feed and high-density breeding environment, and complaints such as odor and water pollution due to management problems are increasing rapidly. Livestock odor has emerged as a serious social problem, and due to growing complaints, conflicts between the Ministry of Agriculture and Forestry and the Ministry of Environment are even causing the livestock industry to lower its status. There is an urgent need for solutions to identify problems in the livestock industry and improve policies. This study aims to develop a " Abelmoschus Manihot Jinhuakui " brand that can improve the intestinal environment of livestock, reduce odors caused by livestock excrement, and improve the productivity of livestock farms in order to improve the increasingly serious odor problem in livestock sites. For Jeju livestock farms, which place more importance on the environment by securing tourists, eco-friendly feed additives were applied to the experiment, the results were derived, and the focus was on solving fundamental problems of odor generation through the development and packaging of feed additive brands. We aim to fundamentally solve the odor problem of domestic livestock farms, secure eco-friendly livestock farms, and contribute to reducing livestock odors and increasing productivity through research results that reduce ammonia levels in each livestock farm.

• Composites Research
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• v.34 no.1
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• pp.57-62
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• 2021

As interest in the eco-friendly ships and lightweight equipment is increasing in the shipbuilding and marine industry, composite materials are applied to equipment such as pipes. In this study, a basalt fiber reinforced furan composite (BFC), an eco-friendly material, was manufactured to apply the pipe insulation cover that requires environment-friendly and heat/flame retardant performance. An optimization study of post-curing conditions of BFC was conducted, and experiments and analysis were performed on mechanical strength, heat/flame retardant properties, and affinity properties. Finally, as a result of the study BFC material is proved to be a good candidate to apply pipe insulation cover.

• Journal of the Microelectronics and Packaging Society
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• v.17 no.2
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• pp.1-9
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• 2010

In this paper, trends on technology of metal and ceramic nanoparticle inks using eco-friendly process were reviewed. There are two types of eco-friendly processes, dry and wet. In case of dry process, gas evaporation process was being used to synthesize the ultrafine nanoparticles. Also, in case of wet process, low temperature process excluding harmful elements such as $Cl^-$ and ${NO_3}^-$ was being used to synthesize the ultrafine nanoparticles. Sizes of nanoparticles were less than 10 nm using the eco-friendly processes, and the nanoparticles were well dispersed into ink solvent. The ink was successfully applied to fabricate directly printed pattern.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.24 no.3
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• pp.33-47
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• 2021

This study was conducted to investigate the influence of eco-friendly restoration in forested bog on the structure of benthic macroinvertebrate community. The benthic macroinvertebrates collected from the surveyed sites were composed of 1,071 individuals, 60 species, 40 families, 13 orders, 6 classes and 5 phyla. At the control and Site 3(small dam), the number of species and individuals were larger than that of other sites, and EPT group ratio was same as well. Considered by index, the dominance index (DI) was found the highest at the biotope area. The diversity index (H') and richness index (RI) were the highest at the control and Site 3. In addition, the ecological score of benthic macroinvertebrate (ESB) showed the highest at site 3, while the lowest at biotope area. The stability and recovery of benthic macrointebrates showed different according to restoration types at forested bog. After restoration project, the benthic macroinvertebrates were observed to get recovery at Site 3, and to have the highest communities stability at control and Site 3. At biotope areas (Site 4, Site 5 and Site 6) communities stability were the lowest, but showed different community stability values according to the presence of water. It is confirmed that the eco-friendly restoration projects indeed provided the better environment for the inhabitation of benthic macroinvertebrate community. The change of community index depending on the restoration projects suggests that the eco-friendly restoration can provide a more suitable environment for benthic macroinvertebrate ecosystem that prefers the stream environment.

• Clean Technology
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• v.10 no.4
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• pp.189-194
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• 2004

The review of the present status of Korean industries and the establishment of strategic R&D agenda are necessary to improve the innovative technological capabilities of Korea to the top level of the world. Recently, Korean ministry of science and technology (MOST) has selected specific areas to develop national technological innovation system, and prepared national technology roadmap (NTRM). Korean ministry of environment (ME) also has prepared technology roadmap (TRM) to help efficient development of environmental science and technology. The development of eco-friendly process in NTRM and TRM was introduced and reviewed in this study. In addition, strength, weakness, opportunities, and threats (SWOT) analysis of technological capabilities of Korea was performed. The results propose the core role of industry, university, research institute, and government for the development of Korean environmental process technology.