• Proceedings of the Korean Institute of Building Construction Conference
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• 2011.05a
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• pp.111-114
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• 2011

Waterprooping Method with sheet need to study technology and multilateral verification considering the arctic conditions as low temperature and humidity, which is the result only considered of material aspects without environmental condition in construction But there are no measures up until now. To solve this problem by using high frequency induction heating method developed waterproof sheets, cold (5 ℃ or less) can be applied in a more stable environment, water-resistant materials and construction methods were studied for development. The results of the test showed that high frequency induction heating method is effective for usability in low temperature condition and securement of proper quality than existing Waterprooping Method with sheet need.

• Korean Journal of Ecology and Environment
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• v.38 no.4 s.114
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• pp.454-460
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• 2005

The goal of this research was to better understand the mechanism of environmental control of PEPC expression from Hydrilla verticillata grown under $CO_2$ stress. When PEPC concentration was plotted against $CO_2$ compensation point (${\Gamma}$), a linear increase in PEPC concentration was seen with a decrease in $CO_2$ compensation point. ${\Gamma}$ was measured on each day of the time course induction. Hydrilla plants exhibited an initially large decrease in ${\Gamma}$ between day 0 and day 1; thereafter, the ${\Gamma}$ declined in a fairly linear trend for the remaining 5 day time course. PEPC activity varied greatly over the time course. PEPC activity increased daily from day 0 through day 5 of the time course. Activity of PEPC increased almost 4-fold over the time course induction. The two upper bands with the approximately 100 kD mass are the PEPC subunits and PEPC was barely detectable in day 0 but increased through day 4 with day 5 being approximately equal to day 4. We provide evidence of increased PEPC protein concentration, and increased PEPC enzyme activity in as little as 24 h after beginning of induction.

• Toxicological Research
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• v.32 no.1
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• pp.21-33
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• 2016

Dichlorodiphenyltrichloroethane (DDT) is still used in certain areas of tropics and subtropics to control malaria and other insect-transmitted diseases. DDT and its metabolites have been extensively studied for their toxicity and carcinogenicity in animals and humans and shown to have an endocrine disrupting potential affecting reproductive system although the effects may vary among animal species in correlation with exposure levels. Epidemiologic studies revealed either positive or negative associations between exposure to DDT and tumor development, but there has been no clear evidence that DDT causes cancer in humans. In experimental animals, tumor induction by DDT has been shown in the liver, lung, and adrenals. The mechanisms of hepatic tumor development by DDT have been studied in rats and mice. DDT is known as a non-genotoxic hepatocarcinogen and has been shown to induce microsomal enzymes through activation of constitutive androstane receptor (CAR) and to inhibit gap junctional intercellular communication (GJIC) in the rodent liver. The results from our previously conducted 4-week and 2-year feeding studies of p,p'-DDT in F344 rats indicate that DDT may induce hepatocellular eosinophilic foci as a result of oxidative DNA damage and leads them to hepatic neoplasia in combination with its mitogenic activity and inhibitory effect on GJIC. Oxidative stress could be a key factor in hepatocarcinogenesis by DDT.

• Journal of Environmental Impact Assessment
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• v.8 no.1
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• pp.29-40
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• 1999

This study focuses on one of typical energy-intensive industries, the cement industry. The purpose of the study is to propose $SO_2$ emission reduction measures in the cement industry. This study partially employed and modified AIM(Asia-Pacific Integrated Model) developed by Japan National Environmental Research Institute to develop AIM/KOREA SULFUR model for simulation. In the study, a base scenario, and mitigation scenarios(a use of low-sulfur contain fuel, fuel conversion to cleaner energy, an induction of desulfurization systems, and energy saving) were employed. The results of the simulation are summarized below: The sulphur dioxide emission from the cement industry in 1992 was estimated to be 106,000 metric tons; however, according to base scenario, sulphur dioxide emission is expected to be increased to 219,000 metric tons, which is 2.1 times greater than that in 1992 by year 2020. To alleviate such increasement, simulation results under various scenarios proved that some degrees of reduction may be possible by an induction of desulfulization systems although there may be numerous ways to interpretate the simulation results.

• The Plant Pathology Journal
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• v.35 no.5
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• pp.406-416
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• 2019

Strawberry, an important fruit crop, is susceptible to a large number of pathogens that reduce fruit quality and productivity. In this study, the effect of a biostimulant prepared from Ascophyllum nodosum extract (ANE) (0.1%, 0.2%, and 0.3%) was evaluated on powdery mildew progression under greenhouse and field conditions. In the greenhouse, application of 0.2% ANE showed maximum reduction in powdery mildew progression as compared to the control. Forty-eight hour post-inoculation, foliar spray of 0.2% ANE reduced spore germination by 75%. Strawberry leaves sprayed with ANE showed higher total phenolic and flavonoid content in response to powdery mildew infection. Furthermore, application of ANE elicited defense response in strawberry plants by induction of defense-related enzymes, such as phenylalanine ammonia lyase, polyphenol oxidase, and peroxidase activity. In field conditions, foliar spray of 0.2% ANE showed a reduction of 37.2% of natural incidence of powdery mildew infection as compared to the control. ANE sprayed plant also reduces the severity of powdery mildew infection under natural conditions. These results indicate that application of ANE induces the strawberry plant's active defense against powdery mildew infection by induction of secondary metabolism and regulating the activities of defense-related enzymes.

• Proceedings of the Korea Environmental Mutagen Society Conference
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• 2003.10a
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• pp.180-180
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• 2003

• Proceedings of the Korea Environmental Mutagen Society Conference
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• 2003.05a
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• pp.72-72
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• 2003

• Proceedings of the Korea Environmental Mutagen Society Conference
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• 2004.11a
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• pp.154-154
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• 2004

• Journal of environmental and Sanitary engineering
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• v.10 no.2
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• pp.74-78
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• 1995

Several reports have suggested that these hydrolases( chitlnase, glucanase ) are likely volved in defense reactions in this Plant. In this paper, Induction by ethylene, mechanism, properties and function for Activation of these enzymes were Summarized.

• Proceedings of the Korea Society of Environmental Toocicology Conference
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• 2002.05a
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• pp.69-70
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• 2002