• KOREAN POULTRY JOURNAL
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• v.28 no.4 s.318
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• pp.192-193
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• 1996

• Journal of Conservation Science
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• v.32 no.3
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• pp.321-331
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• 2016

Textiles damage caused by acetaldehyde($CH_3CHO$) is not clear as compared to other materials. Total 20 specimens were prepared using 4 different materials (silk, cotton, ramie, hemp) after dyed with 4 colors (undyed, red, yellow, blue, black). The specimens were exposed to $CH_3CHO$ gas in the test chamber. First, textile specimens' damage by differert concentration of acetaldehyde(0.1, 0.5, 1, 10, 100, 500, 1000 ppm) was tested. Second, accelerared damage to the textile specimens were tested according to the temperature and humidity conditions at the damage levels. Third, damage of deliberately degraded textile specimens were examined at the damage levels. After the exposure, optical, chemical, and physical evaluation was carried out. As a result, at 1000 ppm/day, the color difference of cotton_yellow has increased. At the condition of $25^{\circ}C-80%$, $30^{\circ}C-50%$, $30^{\circ}C-80%$, the color difference of yellow specimens has increased and grey scale rating has decreased. At $30^{\circ}C-80%$, acetate of cotton_undyed increased and the pH of silk_undyed decreased. In the case of deliberately degraded textile specimens, actetate concentration of black specimens increased. In conclusion, damage to the traditional fabric by acetaldehyde is not impact. However, it is expected that yellow specimens will be bleach and black specimens' actetate concentration will be increase.

• Applied Chemistry for Engineering
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• v.34 no.5
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• pp.507-514
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• 2023

The selective catalytic reduction (SCR) of nitrogen oxides (NO_x) was investigated in a catalyst (Ag/γ-Al₂O₃) packed dielectric barrier discharge plasma reactor. The intermittent generation of plasma in the catalyst bed partially oxidized the hydrocarbon reductant for NO_x removal to several aldehydes. Compared to using the catalyst alone, higher NO_x conversion was observed with the intermittent generation of plasma due to the formation of highly reductive aldehydes. Under the same operating conditions (temperature: 250 ℃; C/N: 8), the NO_x reduction efficiencies were 47.5%, 92%, and 96% for n-heptane, propionaldehyde, and butyraldehyde, respectively, demonstrating the high NO_x reduction capability of aldehydes. To determine the optimal condition for intermittent plasma generation, the high voltage on/off cycle was adjusted from 0.5 to 3 min. The NO_x reduction performance was compared between continuous and intermittent plasma generation on the same energy density basis. The highest NO_x reduction efficiency was achieved at 2-min high voltage on/off intervals. The reason that the intermittent plasma discharge exhibited higher NO_x reduction efficiency even at the same energy density, compared to the continuous plasma generation case, is that the intermediate products, such as aldehydes generated from hydrocarbon, were more efficiently utilized for the reduction of nitrogen oxides.

• Proceedings of the Korean Fiber Society Conference
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• 2003.04a
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• pp.423-424
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• 2003

셀룰로스 직물은 easy care 성능을 부여하기 위하여 가교제로 처리된다. 현재 공업적으로 가장 많이 이용되고 있는 DMDHEU와 같은 N-methyol 가교제는 공정 중 또는 처리된 제품의 저장 중에 발암물질인 포름알데하이드를 유리시키는 경향이 있어 포름알데하이드를 유리시키지 않는 가교결합제의 개발이 활발하게 연구되고 있다. 이러한 비포르말린계 가교제 중 글리옥살은 그 성능은 매우 뛰어나지만 DP 처리시 사용되는 촉매인 aluminium sulfate는 처리직물의 강도저하와 황변을 일으키는 단점을 지니고 있다[1]. (중략)

• Journal of the Korean Chemical Society
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• v.64 no.1
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• pp.49-53
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• 2020

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2002.04a
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• pp.319-320
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• 2002

포름알데하이드(HCHO)는 보건학적인 영향과 광화학 스모그 형성과정의 중요한 역할로 인해 많은 연구의 대상이 되어왔다. 포름알데하이드(HCHO)의 도심지 대기 환경에서 가장 중요한 인위적인 발생원은 산업활동 및 자동차의 배기가스이며 식물의 연소과정(biomass burning)에서도 방출되는 것으로 알려져 있다. 또한 대기환경에 존재하는 휘발성 유기화합물들과 OHㆍ과의 광 화학적 산화과정을 통하여 2차적으로 형성된다. 한편, 주요 소멸과정으로는 광분해(photolysis) 과정과 OHㆍ과의 반응이다. (중략)

• Proceedings of the Korean Fiber Society Conference
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• 2003.10b
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• pp.84-87
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• 2003

셀룰로즈 직물은 easy care 성능을 부여하기 위하여 가교제로 처리된다. 현재 공업적으로 가장 많이 이용되고 있는 DMDHEU와 같은 N-methyol계 가교제는 공정 중 또는 처리된 제품의 저장 중에 발암물질인 포름알데하이드를 유리시키는 경향이 있어 포름알데하이드를 유리시키지 않는 가교결합제의 개발이 활발하게 연구되고 있다. 이러한 비포르말린계 가교제 중 글리옥살은 그 성능은 매우 뛰어나지만 DP 처리시 사용되는 촉매인 aluminium sulfate는 처리직물의 강도저하와 항변을 일으키는 단점을 지니고 있다[1]. (중략)

• Product Safety
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• s.189
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• pp.14-15
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• 2009

• 월간산업보건
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• s.82
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• pp.18-20
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• 1995

• Journal of Korean Society of Environmental Engineers
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• v.37 no.2
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• pp.81-86
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• 2015

A simple analytical method to quantify formaldehyde in water at lower levels (${\mu}g/L$) was developed using a high performance liquid chromatography (HPLC) and acetylacetone as a derivative reagent. Unlike conventional methods, no extraction and/or concentration were required. The derivative reagent was added into samples and reacted for 30 minutes at $80^{\circ}C$ prior to the analysis of formaldehyde using HPLC. The method detection limit and the limit of quantification for this method were 1.6 and $5.0{\mu}g/L$, respectively. This method also achieved high precision (0.6-3.0%) and accuracy (91.6-106.3%). The recovery rates for various environmental samples ranged from 92.0 to 115.2%.