• Korean Journal Plant Pathology
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• v.1 no.1
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• pp.67-71
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• 1985

A severe infection on pepper fruits by a black mold fungus was observed in the fields, Suweon. Conidia of Alternaria sp. were isolated from the infected fruits. Based on the morphological characters and size of the conidia, the fungus was identified as Alrernaria alternata (Fries) Keissler. The single spore isolates of A. alternata were weakly or not pathogenic on non-wounded pepper fruits, but highly virulent on fruits wounded with sandpaper or heated-glass rod. The infection on the wounded fruits were more severe on red fruits than on immature green ones. No visible infection was found on leaves and stems when 60-day-old plants of pepper were inoculated with the fungus. In July of 1984, the field losses of pepper fruits caused by black mold were $2.0\~22.5\%$ in Suweon.

• Journal of the Korean Institute of Gas
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• v.14 no.6
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• pp.27-30
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• 2010

This paper presents the system design process of district community cooling system using LNG cold energy. The newly developed LNG cooling system includes several heat exchangers, LNG storage tank, thermal mass storage tank, several cold energy storage tanks, gas air-conditioners, compressors, constant pressure regulators, cold energy and hot energy supply pipes. In addition, the gas air-conditioner system is installed to supply not sufficient cold energy due to low level of city gas consumptions during a summer period. This system design is very effective and safe to supply cold energy mass of fresh air by exchanging two thermal masses of an air and 200kcal/kg cold energy of LNG. The district community cooling system with LNG cold energy does not produce CO2 and freon gases in the air.

• Resources Recycling
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• v.22 no.4
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• pp.46-54
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• 2013

The produced quantity of waste plastics including waste vinyls was assumed as about 5 million tons per year. The quantity of waste vinyls produced from the waste recycling center among total quantity of waste plastics was estimated as about 1 million tons per year. Most of waste vinyls produced from the waste recycling center were recycled as refuse plastic fuel(RPF) or recycled feedstock material. In this study, the medium material using waste vinyls was made by the melting process of heat medium heating and the tensile strength was analyzed for checking the usable possibility of recycled waste vinyl material by comparing with the existent product. In order to use the medium material for producing the recycled product, it can be considered that the tensile strength of medium material is more than 100 $kgf/cm^2$.

• KSBB Journal
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• v.20 no.2 s.91
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• pp.129-132
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• 2005

This work was a method that used an acid hydrolysis for increasing the efficacy of decreasing alcohol concentration from Hovenia dulcis extract. For acid hydrolysis, the best pH was 2.0 to obtain a maximum alcohol dehydrogenase activity at fixed reaction temperature and time. At pH 2.0, reaction temperature $80^{\circ}C$ and reaction time 4 hr gave the highest activity which was $124\%$ of control. The bioactive compound, (+)-dihydromyricetin, content increased to $30\%$ after acid hydrolysis. This is very simple and efficient method to increase the efficacy of decreasing alcohol concentration from Hovenia dulcis extract.

• Journal of the East Asian Society of Dietary Life
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• v.22 no.4
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• pp.473-479
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• 2012

In this study, increased alcohol decomposition efficacy (ADH) of Hoveina dulcis extract by Carbohydrate-Hydrolyzing Enzymes was investigated. Carbohydrate decomposition enzymes such as Maxinvert (Invertase), Optidex L-400 (Glucoamylase) and Rohament CL (Cellulase & Pectinase) were added to Hoveina dulcis extract at different concentrations (0.01, 0.05, 0.1, 0.5 and 1%) for 48 hrs, after which samples were taken every 6 hrs for determination of ADH activity. As the enzyme concentration became higher, ADH activity also increased. Especially, the addition of 1% Rohament CL increased enzyme activity to 76% at 30 hrs incubation, after which the increase in activity stopped. In the rat and human body experiment, enzymatic decomposition of Hovenia dulcis extract by addition of 1% Rohament CL was also effective in decreasing serum alcohol concentration and respiration. Especially, in the early stage after alcohol consumption, the efficacy of enzyme treatment of Hovenia dulcis extract was more effective. These results show that if the glycoside forms of active compounds such as flavonols in Hovenia dulcis extract are converted into aglycone forms, alcohol decomposition capability can be enhanced.

• Transactions of the Korean Society of Mechanical Engineers
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• v.10 no.4
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• pp.568-576
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• 1986

본 연구에서는 포하수 혹은 팽창기를 열매체로한 스크루우팽창기의 회전자회 전각에 의한 회전자간체적변화, 흡입구의 면적변화, 팽창기내에서의 누설통로에서의 임계등의 기하학적 특성과 흡입구와 누설통로에서의 임계유속을 고헌한 해석프로그램 을 개발하여 회전자회전수 흡입열매체의 건도, 흡입.토출압력비 그리고 팽창기내부에 서의 누설등의 효과에 대한 해석을 행하여 스크루우 팽창기의 동력발생기로서의 실용 성을 검토하였다.

• 한국신재생에너지학회:학술대회논문집
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• 2011.05a
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• pp.186.1-186.1
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• 2011

Most of waste plastics including waste vinyls have been recycled up to about 50% of waste production, 4.5 million ton per year in 2009. To fundamentally increase the recycled amounts of waste plastics to waste production, the energy utilization of waste plastics is inevitable. But the contents of PVC included in waste plastics can limit the use as a RPF and make the air pollutants such as HCl and dioxin when it burns in the combustion system. Accordingly the source dechlorination by using heating method can be applied to make low contents of HCl as less than 0.6%. In this study the twin screw reactor using heat medium was used for the source dechlorination. As results of study, it was considered that this system is effective for the industrilal application.

• KSBB Journal
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• v.6 no.4
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• pp.379-383
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• 1991

Pervaporation can be successfully utilized to recover alcohol from fermentation broths and dilute process streams. Polydimethylsiloxane (thickness: $60\mu$m), such as hydrophobic membrane have been employed in this application to produce an enriched product. The fermented alcohol was continuously extracted, and simultaneously concentrated by pervaporation, from the membrane bioreactor, and the extracted alcohol concentration was 6 to 10 times higher than in the broth. This experimental conditions were 6-10 Torr vacuum line, pH=5, $32^{\circ}C$, 3.5 liters of working volume, 200rpm of agitator speed, and 0.14 wm aeration flow rate.

• KSBB Journal
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• v.6 no.4
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• pp.425-429
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• 1991

Porous glasses were prepared from $TiO_2$ containing borosilicate glass by the phase separation. Pore distribution and surface area of porous glasses were invesigated by SEM and porosimeter. As temperature and heating time increase. The pore size and volume increased, but the specific surface area decreased above the critical temperature. The specific surface area and pore size showed more sensitive change on the variation of heating temperature than of heating time.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1999.11a
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• pp.91-94
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• 1999

1. 가열과정과 냉각과정의 열매체 입출구 온도차는 초기에 6$^{\circ}C$이상이었으나 후기의 온도차는 3$^{\circ}C$정도로 나타났으며, 가열과정 중 상변화가 이루어지는 시간은 약 2시간, 3$0^{\circ}C$에서 상변화과정이 이루어지며, 냉각과정은 3$0^{\circ}C$에서 1차 28$^{\circ}C$에서 2차 상변화과정이 진행되는 것으로 나타났으나 30-28$^{\circ}C$에서 계속적인 상변화과정이 나타났으며 진행시간은 약 3시간으로 나타났다. 2. 축열재를 700kg 주입하여 축열성능과 방열성능을 측정한 결과 축열재의 축열량은 37,818㎉, 방열량은 36,228㎉로 나타났다. 이상의 결과로 볼 때 축열시스템의 효율은 95.8%로 나타났다.