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현장 냄새의 5가지 특성 모니터링이 가능한 모바일 냄새 앱 구성 요소 개발
최호윤,김지연,윤종훈,김만구 한국냄새환경학회 2021 실내환경 및 냄새 학회지 Vol.20 No.2
The degree and intensity of unpleasant and disgusting odors perceived through a person's sense of smell can vary depending on personal or social and cultural characteristics. In addition, it is not effective to manage odors solely on the basis of concentration levels because odors can be combined according to temperature, humidity, and frequency, so that they can be recognized differently even if the same person smells the same substance. The mobile odor application was developed to enable real time monitoring of odor characteristics reflecting the actual condition of the field. Accordingly, the Green Future Foundation, a civic group, conducted an environmental campaign to record and share the information of odors in school zone using the first version of the application. The real time monitoring of field odor was able to improve the problems of the current standard methods for the examination and assessment of odors. However, with regard to the first version of the application, the process and results of odor recording through odor measurement applied the direct olfactory method and were less relevant. Therefore, it was difficult to organize data due to duplicate selection. For that reason, this study was conducted to overcome the problems of the first version of the mobile application and to effectively and accurately reflect odors and personal characteristics. This odor application that has been developed is able to monitor and assess odors based on 5 features: classification, character, strength level, hedonic tone, and acceptability.
NaBH4를 이용한 암모니아 보란 수소 저장 소재 합성 공정 개발
최호윤,박성진,정성진,백종민,송한덕,김종수,이건종,김영래 한국수소및신에너지학회 2014 한국수소 및 신에너지학회논문집 Vol.25 No.5
Ammonia borane (NH3BH3), as a source material for energy generation and hydrogen storage, hasattracted growing interest due to its high hydrogen content. We have investigated the synthesis of ammonia boranefrom sodium borohydride (NaBH4) and ammonium chloride (NH4Cl) utilizing a low-temperature process. Fromour results, we obtained a maximum synthetic yield of 98.2% of ammonia borane complex. The diammoniatediborane (DADB) was detected in about 5~10mol% with in the solid ammonia borane by solid-state 11B-NMRanalysis. The synthesized solid ammonia borane products were studied to characterize hydrogen release uponthermal dehydrogenation.
손지원,최호윤,이한나,서민구,이숙경 대한미생물학회 2014 Journal of Bacteriology and Virology Vol.44 No.1
Epstein-Barr virus (EBV)-encoded small non-coding RNAs (EBERs) are abundantly expressed in various EBV-associated malignancies, and play critical roles in cell proliferation, tumorigenesis, and apoptosis resistance. However, the mechanism how EBERs regulate cell function awaits further clarification. In this study, we investigated the effect of EBERs on the expression of cellular microRNA (miRNA) and mRNA expression. To test the effect of EBERs while unaffected by other EBV genes, we used EBERs-deleted recombinant EBV infected Burkitt's lymphoma cell line (Akata(+)EBERs(-)) as well as EBV-infected (Akata(+)) and EBV uninfected (Akata(-)) cell lines. They all have the same genetic backgrounds. First, 15 different cellular miRNAs which have reverse complementary sequences to EBERs and have reported targets were selected by bioinformatics analysis. When RT-PCR was carried out for the 16 miRNAs using RNAs from Akata(+), Akata(-), and Akata(+)EBERs(-) cells, hsa-miR-7-5p was the only one showing down¬regulated expression in Akata(+) than in Akata(-) and Akata(+)EBERs(-) cells. Bioinformatics and mRNA microarray analyses for Akata(+), Akata(-), and Akata(+)EBERs(-) cell lines were then carried out to predict putative targets of hsa-miR-7-5p. Among the 6 predicted targets of hsa-miR-7-5p, only low density lipoprotein receptor-related protein 6 (LRP6) was up-regulated in EBERs-expressing cells when tested by RT-PCR and Western blot. However, luciferase reporter assay showed that the 3'-UTR of LRP6 was not directly targeted by hsa-miR-7-5p. Our data suggest that both hsa-miR-7-5p and LRP6 are regulated by EBERs in Akata cells, and these genes may partly mediate the tumorigenic function of EBERs in Burkitt's lymphoma.