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Electron transfer mechanisms through multi-component enzymes
유희선,이승재 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Hydroxylation through soluble methane monooxygenase (sMMO) has been studied extensively to understand the biological conversion from methane to methanol in ambient conditions, although more detailed mechanisms of this biocatalyst are yet undiscovered. In this study, sMMO components, including the hydroxylase (MMOH), regulatory (MMOB), and reductase (MMOR), were expressed and purified from a type II methanotroph, Methylosinus sporium strain 5 (M. sporium 5), to characterize its hydroxylation mechanism. The cell extract showed that MMOH, MMOB, and MMOR were expressed by M. sporium 5, and these enzymes were extracted with high purity. The enzyme activity confirmed that 2.0 mol equivalents of MMOB is necessary to achieve catalytic activities, and sMMO from M. sporium 5 oxidized a broad range of substrates, including alkanes, alkenes, halogens, and aromatics.
유희선,권우택,홍상표 한국냄새환경학회 2014 실내환경 및 냄새 학회지 Vol.13 No.2
In order to evaluate the quality of indoor air due to the remodeling and newly-built in S City, 60 schools wereinvestigated in formaldehyde (HCHO) and total volatile organic compounds (TVOCs). One school exceeded thenational standard of formaldehyde 100 μg/m3 at 1st measurement. Thirty-eight schools showed higher level ofTVOCs over 400 μg/m3 at 1st measurement. Twelve schools showed higher level of TVOCs over 400 μg/m3 at2nd measurement. This result derived from TVOCs which originated from the building materials and finishingmaterials. To prevent the pollution of indoor air quality at schools caused by formaldehyde and TVOCs, therecommendation of environmentally-friendly building materials, the diminishment of emission by bakeout process,the efficient combination of natural ventilation and mechanical ventilation, and antibacterial effect of chemicalcontrol measures as photo-catalysts should be given positive investigation.
유희선,홍상표,권우택 한국실내환경학회 2014 한국실내환경학회지 Vol.13 No.2
In order to evaluate the quality of indoor air due to the remodeling and newly-built in S City, 60 schools were investigated in formaldehyde (HCHO) and total volatile organic compounds (TVOCs). One school exceeded the national standard of formaldehyde 100 µg/m3 at 1 st measurement. Thirty-eight schools showed higher level of TVOCs over 400 µg/m3at 1 st measurement. Twelve schools showed higher level of TVOCs over 400 µg/m3a t2 nd measurement. This result derived from TVOCs which originated from the building materials and finishing materials. To prevent the pollution of indoor air quality at schools caused by formaldehyde and TVOCs, the recommendation of environmentally-friendly building materials, the diminishment of emission by bakeout process, the efficient combination of natural ventilation and mechanical ventilation, and antibacterial effect of chemical control measures as photo-catalysts should be given positive investigation.