• 한국환경과학회지
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• 제18권10호
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• pp.1123-1134
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• 2009

This study was designed to evaluate qualitatively and quantitatively the pollutant compositions, which were emitted from three types of mosquito repellents(MRs)(mat-, liquid-vaporized, and coil-type) by utilizing a 50-L environmental chamber. A qualitative analysis revealed that 42 compounds were detected on the gas chromatography/mass spectrometer system, and that the detection frequency depended upon chemical types. Nine of the 42 compounds exhibited a detection frequency of 100%. Four aromatic compounds(benzene, ethyl benzene, toluene, and xylene) were detected in all test MRs. The concentration equilibriums in the environmental chamber were achieved within 180 min after sample introduction. The coil-type MR represented higher chamber concentrations as compared with the mat- or liquid-vaporized-type MR, with respect to the target compounds except for naphthalene. In particular, the chamber concentrations of ethyl benzene, associated with the use of coil-type MR, were between 0.9 and $65\;mg\;m^{-3}$ whereas those of mat- and liquid-vaporized-type MRs we~e between 0.5 and $2.0\;mg\;m^{-3}$and 0.3 and $1.4\;mg\;m^{-3}$, respectively. However, naphthalene concentrations in the chamber, where a liquid-vaporized-type MR was placed, were measured as between 17.8 and $56.3\;mg\;m^{-3}$, but not detected in the chamber, where a mat- or coil-type MR was placed. The empirical model fitted well with the time-series concentrations in the environmental chamber(in most cases, determination coefficient, $R^2$ ≿ 0.9), thereby suggesting that the model was suitable for testing emissions. In regards to the target compounds except for benzene, although they were emitted from the MRs, health risk from individual exposure to them were estimated not to be significant when comparing exposure levels with no observed adverse exposure levels or lowest observed adverse exposure levels of corresponding compounds. However, it was concluded that the use of MRs could be an important indoor source as regards benzene.

• 한국건축시공학회지
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• 제21권6호
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• pp.529-538
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• 2021

본 논문은 발수제 첨가 모르타르의 강도 및 발수성에 미치는 다양한 요인 중에서 발수제 종류 및 잔골재 입도에 대한 영향을 검토하고자 하였다. 그 결과 발수제 첨가 시멘트 모르타르의 압축강도는 무첨가 시멘트 모르타르와 비교하여 감소하였고, 올리고머계 발수제 첨가 모르타르의 압축강도는 모노머계 발수제와 비교하여 높게 나타났다. 또한 잔골재 입도에 따른 시멘트 모르타르 압축강도 영향은 크게 나타나지 않았다. 발수제 첨가 모르타르의 접촉각은 무첨가 모르타르와 비교하여 증가하였고, 올리고머계 발수제보다는 모노머계 발수제가 상대적으로 증가하였다. 또한 연마 전후 접촉각은 잔골재 입도에 따라서 상이한 경향을 보이고 있다.

• 보존과학연구
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• 통권22호
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• pp.133-154
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• 2001

Stone cultural properties, exposed in natural environment, is deteriorated by many weathering reasons for a long time. It is necessary to treat of consolidation and water-repellent on the surface because of the conservation of stone cultural properties. We was treated the specimen [granite(Hwangdung-suk), sandstone, marble(in JeongSeon)] by synthesis resin of DWR-Ⅲ, SI2121 and fluoropolymer, and tested on the durability, water-repellent, color stability and luster generation etc. In the result of this study, DWR-Ⅲ and fluoropolymer is superior to the waterrepellent, durability of salt and acid rain. SI2121 is superior to the penetration because of lower viscosity, but the water-repellent is inferior to the others. After the treatment of chemicals, the color-variation make an appearance but luster-generation doesn’t. With the passage of time, the color of specimen was got better because of the ‘washing’ phenomenon for ultra-violet, salt etc.

• Journal of Applied Biological Chemistry
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• 제44권3호
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• pp.140-142
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• 2001

Quantitative gas chromatographic method for determining the ant repellent activity of cineol, ${\alpha}$-terpineol, linalool, and piperitone which usually found in Chinese Prickly Ash Zanthoxylum piperitum DC. was developed. These monoterpenes showed higher ant repellent activities than DEET due perhaps to their volatility. Gas chromatographic method quantified the volatility of the four monoterpenes and DEET.

• 한국잠사곤충학회지
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• 제16권2호
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• pp.127-131
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• 1974

상족촉진제를 개발하기 위하여 우슬 및 Amino산을 혼용한 촉진제를 첨식하였던바 그 성적은 다음과 같이 요약할 수 있겠다. 1. 10%의 우슬용액의 숙화촉진작용은 현저하며 충질에도 크게 영향을 미치지 않는다. 2. 필수 Amino산 첨식은 누에의 경과와 견사선 성장을 촉진한다. 3. 상족촉진제는 처리시각과 기상환경에 따라서 숙화촉진과 견질에 미치는 영향에 약간의 차이가 있다. 4. 개발된 상족촉진제는 상족을 촉진한다.

• 한국응용과학기술학회지
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• 제5권1호
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• pp.63-70
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• 1988

The quaternized compound of the copolymer between 2-diethylaminoethyl methacrylate and stearyl methacrylate (DSACC) was chosen as the mother resin for the water repellent of acrylics. The quaternized compound of 1-lauroyl dis (amino ethyl)-2-dodecyl imidazoline (LDDIC) was used to promote softening effect and hydrostatic pressure for the water repellent. The water repellent (EDUWC) obtained from the DSACC and LDDIC blended with waxes and emulsifiers improved the properties such as the water repellency, washable, tear strength and crease recovery when it was treated on the nylon fabrics with and without the resin. The reaction mechanism between the Nylon fiber and EDLWC was examined, and EDLWC was confirmed as the durable water repellent.

• Mass Spectrometry Letters
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• 제14권4호
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• pp.160-165
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• 2023

Citronella oil, an essential oil extracted through steam distillation from the leaves and stems of Cymbopogon, is a natural complex substance (NCS) regulated by the Korean government for its use in insect repellents. The component ratios of NCSs like citronella oil vary due to differences in manufacturing processes and origins, presenting a challenge in identifying and quantifying these substances in consumer chemical products. This study analysed ten commercially available products of the most commonly used types of citronella oil, specifically Java and Ceylon types, using gas chromatography (GC)-mass spectrometry (MS) and GC with flame ionization detection (FID). Through chromatographic data, we aimed to determine the components that can qualitatively identify citronella oil and the indicator ingredients that can be used for content analysis.

• 한국응용곤충학회지
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• 제44권4호
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• pp.331-336
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• 2005

본 연구는 장기간 지속효과가 강조된 미국 T사의 C제품(에어로졸)과 D제품(로션) 대비 국내5사의 A 제품(에어로졸)과 B 제품(액제)에 대하여, 사람 손에 처리 시 흰줄숲모기(Aedes albopictus)의 기피지속성에 대한 생물검정을 평가하고 시간 경과에 따른 기피 주성분인 DEET의 잔존량을 분석하였다 기피제 처리 후 8시간 조사에서 A제품은 8시간까지 95%의 기피효과를 나타냈으며, B제품, C 제품, D 제품은 각각 5, 6, 6시간까지 기피효과를 보였다. 그리고 면포를 이용한 16일까지의 장기간 지속성 평가에서, A 제품과 C 제품은 각각 10일까지 100%의 기피 지속성을 나타냈고, 시간 경과에 따른 기피 주성분인 DEET의 잔존량 분석에서도 동일한 양상으로 감소하였다.

• 한국응용곤충학회지
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• 제62권2호
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• pp.95-102
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• 2023

최근 들어 반려동물을 키우는 가구 수가 증가하고 있다. 그로인해 진드기와 냄새에 대한 관심 또한 증가하고 있다. 본 연구는 제충국 추출물(Tanacetum cinerariifolium), 수용성 피톤치드(water-soluble phytoncide)가 진드기 퇴치제로서 효과와 탈취 및 항균 효과가 있는지 알아보기 위하여 연구를 진행하였다. 틱 클라이밍 테스트(Tick climbing test)에서 제충국 추출물(Tanacetum cinerariifolium) 23.33점, 수용성 피톤치드 22.00점으로 높은 기피효과를 보였다. 복합추출물로서의 진드기 기피 효과를 확인하기 위해 위 실험에서 기피 효과가 확인된 제충국 추출물, 수용성 피톤치드를 포함한 복합추출물(Sample이라 함.), 타사 제품(Control이라 함.)로 틱 클라이밍 테스트(Tick climbing test)를 진행하였다. 결과 Sample 13.00점, Control 26.67점으로 Sample이 높은 기피 효과를 나타내었다. 참진드기 실내 기피제 효력 시험법에서도 Sample이 88%, Control이 12%로 우수한 진드기 기피효과를 보인다는 것을 확인하였다. Sample을 가지고 탈취 시험을 진행한 결과 암모니아에서 98.3%, 트리메틸아민에서 99.5%의 탈취 효과를 보여주었으며, 항균시험에서 대장균, 황색포도상구균, 폐렴균 모두 99.9%의 항균 효과를 보여주었다. 본 연구결과를 종합해 볼 때 위 소재를 포함한 복합추출물은 추후 진드기 기피제와 탈취 및 항균에도 효과가 있는 소재로서의 활용 가치가 높다고 판단된다.

• 한국동물위생학회지
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• 제43권3호
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• pp.167-171
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• 2020

The epidemiological investigation of outbreak in korea confirmed that the inflow of avian influenza (AI) is related to the migration of migratory birds. In this study, avian repellents instrument were implemented and developed using the visual effects of lasers in accordance with the situation of small domestic fowl farms, and monitoring cameras were installed around each instrument to investigate the frequency of wild birds appearing and evaluate the performance of the instrument. Observation showed that the appreance ratio was reduced by 95%, and no significant reduction in the intrusion prevention effect by adaptation was observed on all fowl farms. In conclusion, it is expected that the outbreak of wild bird-borne infectious diseases such as avian influenza will be decreased if the device is installed on domestic fowl farms.