• Journal of Digital Convergence
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• v.15 no.1
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• pp.509-517
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• 2017

As the effectiveness of ionic water that mainly used for the purpose of treatment has been widely known with the recent "well-being" trend, people's interest in it is also gradually increasing. Especially, the alkaline ionic water for drinking purpose could conveniently provide different types/amount of inorganics required for different dietary life depending on nature and race, could effectively provide alkaline inorganics that could be insufficient to modern Korean people, and also could provide alkaline inorganics that prevent/cure/relieve pregnant women's morning sickness. Applying the suggested performance/manufacturing method of alkaline ionic water through the performance assessment of alkaline electrolytic ionic water of the developed product, it would be necessary to have additional researches on the improvement of product or parallel development that could be applied to diverse areas.

• Korean Journal of Weed Science
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• v.6 no.1
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• pp.67-75
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• 1986

This study was undertaken to investigate the interrelation between herbicide and insecticide and fungicide on rice (Oryza saliva L.) at various growth stages. Carbamate insecticide BPMC (2-sec-butylphenylmethyl-carbamate) severely inhibited germination of rice when applied alone and in combination with herbicides tested. No germination inhibition was obtained with thio- and dithiocarbamate pesticides. Post-germination growth of rice was severely inhibited by the treatments which were combined with BPMC irrespective of herbicides studied. Phytotoxicity of pendimethalin (3,4-dimethyl-2,6-dinitro-N-1-ethyl propylamine) was reduced by antagonistic effect of organophosphorus compounds. When herbicides were applied with either insecticide or fungicide, post-germination growth of rice was more greatly affected by the concentration of herbicides than that of insecticides or fungicides. Most of herbicide-insecticide or herbicide-fungicide treatments did not cause great phytotoxicity on rice when applied 5 days after transplanting. Foliage activity of phenoxy herbicide 2,4-D (2,4-dichlorophenoxy acetic acid) and MCPA [(4-chloro-o-tolyl) oxy acetic acid] increased with addition of carbamate and urea pesticides.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2005.05a
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• pp.356-359
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• 2005

하수를 처리하는 공정에서 해마다 슬러지의 발생량은 증가하고 있으며, 이를 효과적으로 처리하는 것이 매우 중요하다. 따라서, 본 연구는 경제적이면서도 측정이 간편한CST(Cap-illary Suction Time)을 통해 슬러지 의 탈수성 과 적 정 주입량을 산출하는 방법을 연구하였다. 이를 위하여 본 실험의 대상인 도시 하수슬러지에 대하여 함수율 및 pH변화, 무기 및 유기 응집제의 주입량 변화, 그리고 응집제 투입 후 침전된 응집제량을 조사하여 탈수성을 조사하였다. 슬러지의 함수율을 97%, 98%, 99%로 했을 때, CST는 99%일 때가 가장 적은 값으로 나타났다 응집제 주입 후 침전된 슬러지의 생성량은 응집제가 증가됨에 따라 증가하다가, 최적 주입량보다 더 많은 응집제를 주입할 경우에는 그 양이 감소했다. 이는 형성된 응집물의 구조적 특성의 변화를 나타내고 있음을 알 수 있다. 위와 같은 실험 결과를 통해 CST는 수분이내(< Smin)에 슬러지의 탈수성을 신속하게 측정할 수 있는 방법이며 비교적 정확하게 측정할 수 있음을 알 수 있다. 뿐만 아니라 응집제의 최적 주입량 및 응집물의 구조적 특성을 평가하는 데에도 유용하게 사용할 수 있다.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2020.08a
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• pp.50-50
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• 2020

본 연구는 천궁에 감염된 오이모자이크바이러스(CMV)와 천궁엽맥황화바이러스(CnVYV)의 제거를 위해 항바이러스제인 리바비린 처리 효과를 조사하기 위해 수행되었다. 천궁 기내식물체의 생장점을 절취 후 항바이러스제 농도를 달리한 배지에서 생육을 유도한 후 RT-PCR 방법을 통해 바이러스 검출율을 조사하였다. 리바비린을 40 mg l^-1 농도로 처리하였을 때 바이러스 검출 종 수는 1.1종으로 감소하였다. 또한 동일조건에서 CMV와 CnVYV-2의 검출율은 무처리구 대비 각각 1/5과 1/2 수준으로 감소하였다. 하지만 리바비린 처리에 따른 CnVYV-1의 검출율은 감소하지 않았다. 리바바린 처리 농도에 따른 생존율은 처리구별로 유의적인 차이가 나타나지 않았으나, 40 mg l^-1 리바비린 처리구에서 신초 발생 수와 신초 길이는 무처리구 대비 절반 수준으로 감소하였다. 리바비린 처리를 통해 CMV와 CnVYV-2가 미검출된 23개체를 선발하였으며, 추가적인 바이러스 검정 단계를 거쳐 무병묘 생산에 활용될 것이다.

• Journal of Korea Water Resources Association
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• v.35 no.2
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• pp.213-220
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• 2002

This reserch was focused upon experimental study for wastewater reuse and conducted to evaluate optimum operating conditions of rapid filtration process such as filter flow rate, filtration time and backwashing condition for reuse of secondary-treated effluent using the pilot plant installed in real wastewater treatment plant. Also, the experiment on treatment char-acteristics of coagulant-added activated sludge process was performed to compare with activated sludge succeeded to rapid filtration. As the filtration velocity was 100m/day, the filtration time of the rapid filter connected with activated sludge system was revealed to 40 hours. Backwashing of filter was conducted by water wash and air scour. The optimum backwashing time and backwash flow rate were 10min and 10LPM, respectively. The quantity of backwashing water of the rapid filter was about 2% of total treated water.

• Journal of the Korea Convergence Society
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• v.11 no.10
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• pp.213-217
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• 2020

An eco-friendly water purifier was developed using natural minerals, plants, and sludge from water purification plants. A wastewater complex treatment system using this water purification agent was developed. The wastewater complex treatment system goes through the process of inflow of contaminated water, input of water purification agent, operation of a pressurized flotation device, sludge flotation, sludge collection and treatment water discharge. This device was applied to the removal of green algae in livestock desorption liquid, broiler washing water, factory wastewater, sewage treatment plant and pond to obtain excellent removal rate. The use of natural water purification agents for organic waste purification has not been investigated.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.05a
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• pp.183-184
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• 2000

김 양식장은 대부분 천해해역으로서 영양염류가 풍부하여 김의 생산력은 증가되나 풍부한 영양염은 김의 성장을 촉진함과 동시에 잡균, 잡조(파래, 규조등)의 중식도 촉진된다. 김망에 부착된 잡조류를 구제하는 산처리제로서 염산을 사용하는 사례가 있어 해양생태계 뿐만 아니라 김 소비에 나쁜 영향을 끼친다. 정부에서는 염산사용에 따른 어장의 황폐화를 방지하고 양질의 김 생산을 위하여 산 처리제로서 염산 등 무기산에 대체할 수 있는 유기산를 사용하도록 권장하고 있으나 제조공정, 경제성, 현장적용과 효과면에서 여러 가지 문제가 해결되지 않고 있다. (중략)

• Journal of Animal Science and Technology
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• v.48 no.5
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• pp.719-726
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• 2006

Bovine whey protein are rich in cysteine, which is the rate limiting amino acid for synthesis of antioxidant glutathione(GSH). Some strains of Lactobacillus caseihas been reported to contain high level of GSH in cell extracts. The objective ofthis study was to determine whether enzymatically hydrolyzed whey protein isolate(WPI) and cell extract of Lb. casei HY2782 could increase intracellular GSH concentrations and protect against oxidant induced cell death in human prostate epithelial cell line (designated as RWPE1, and PC3MMM2 cells). Treatment of RWPE1 cellsandPC3MMM2 cells with hydrolyzed WPI (500g/ml) significantly increased GSH by28.2% and38.4% respectively. Compared with control cells receiving no hydrolyzed WPI(P<0.05). hydrolyzed WPI and Lb casei HY2782 cell extracts significantly protected RWPE1 and PC3MMM2 cellsfrom oxidant induced cell death compared with controls receiving no WPI. DNA damage associated with oxidant treatment was demonstrated by single cell gel (SCG) electrophoresis.

• Journal of Conservation Science
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• v.30 no.2
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• pp.157-168
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• 2014

This study, by selecting 3 kinds(Polish T, H, C) of metal polish being frequently used for silver archival objects treatment at present, a polish having excellent conservative property that minimizes damage of silver surface while effectively removing its yellow discolored layer by each using tool was intended to be discovered by comparing performance of tarnish inhibitor, corrosion inhibitor contained in each polish. As a result of analysis, it was confirmed that specimen that was cleaned with cotton swab and lint-free wipe by using Polish C provides not only uniformed surface expression and minimum damage but also removal function of corrosion layer. In addition, even though tarnish inhibition film should be formed after polish treatment, discolored phenomenon is unable to be prevented but among those polishes, Polish C was represented to be most stable against UV and yellowing and it showed relatively better features than that of Polish H and T in terms of hydrophobic, dispersive property. Through this, it is confirmed that Polish C would show the most excellent performance among polishes being used for conserving silver archival objects.

• Korean journal of applied entomology
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• v.36 no.3
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• pp.277-282
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• 1997

Chemosterilant effect of chlorpyrifos-methyl (CPM) on the beet armyworm, Spodoptera e.rigua (Hubner) was investigated, using topical application. Egg fecundity and fertility were analyzed in the adults reared from the fifth instar larvae which were treated with sublethal doses of CPM. Though CPM reduced fecundity a little, it gave significant negative effect on egg fertility in a dose-dependent manner. Genetic analysis was performed by reciprocal crosses between treated (100 Wgllarva) and untreated individuals and showed a dominant lethal effect of CPM on egg fecundity and fertility. This results indicate that chlorpyrifos-methyl may act as a chemosterilant as well as a well-known neurotoxicant, and suggest that it can be used in genetic control program.