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시스템 해석에 기초한 하수관망 오염 매카니즘과 관망 모니터링 및 이상진단
강온유 ( On Yu Kang ),이승철 ( Seung Chul Lee ),김민정 ( Min Jeong Kim ),유수민 ( Su Min Yu ),유창규 ( Chang Kyoo Yoo ) 한국화학공학회 2012 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.50 No.6
Nonpoint source pollution causes leaks and overtopping, depending on the state of the sewer network as well as aggravates the pollution load of the aqueous water system as it is introduced into the sewer by wash-off. According, the need for efficient sewer monitoring system which can manage the sewage flowrate, water quality, inflow/infiltration and overflow has increased for sewer maintenance and the prevention of environmental pollution. However, the sewer monitoring is not easy since the sewer network is built in underground with the complex nature of its structure and connections. Sewer decontamination mechanism as well as pipe network monitoring and fault diagnosis of water network system on system analysis proposed in this study. First, the pollution removal pattern and behavior of contaminants in the sewer pipe network is analyzed by using sewer process simulation program, stormwater & wastewater management model for expert (XP-SWMM). Second, the sewer network fault diagnosis was performed using the multivariate statistical monitoring to monitor water quality in the sewer and detect the sewer leakage and burst. Sewer decontamination mechanism analysis with static and dynamic state system results showed that loads of total nitrogen (TN) and total phosphorous (TP) during rainfall are greatly increased than non-rainfall , which will aggravate the pollution load of the water system. Accordingly, the sewer outflow in pipe network is analyzed due to the increased flow and inflow of pollutant concentration caused by rainfall. The proposed sewer network monitoring and fault diagnosis technique can be used effectively for the nonpoint source pollution management of the urban watershed as well as continuous monitoring system.
이희경,최온유,최두복,최현숙,Lee, Hee-Gyeong,Choi, On-Yu,Choi, Du-Bok,Choi, Hyun-Suk 한국식품영양학회 2020 韓國食品營養學會誌 Vol.33 No.5
In this study, hot water and ethanol, acetone, and hexane extracts of the steamed Deodeok were investigated for use as raw materials for natural cosmetics. Hot water and ethanol, acetone and hexane extracts of steamed Deodeok did not indicate cell toxicity up to 300 ㎍/mL concentration in the MTT assay. The tyrosinase inhibition effects of the ethanol extract were higher than the ascorbic acid. The efficacy of the steamed Deodeok's ethanol extract on the elastase inhibition was similar to that of quercetin at higher concentrations. In conclusion, water, ethanol, acetone and hexane extracts of the steamed Deodeok indicated strong possibility as a whitening and anti-wrinkle functional cosmetic ingredient. Among them, the steamed Deodeok's ethanol extract, which showed excellent activity, is highly available because it has high safety compared to other organic solvent extraction methods used in cosmetics, and has minimal irritation to the skin.
이희경,최온유,최두복,최현숙,Lee, Hee-Kyung,Choi, On-Yu,Choi, Du-Bok,Choi, Hyun-Suk 한국식품영양학회 2021 韓國食品營養學會誌 Vol.34 No.1
This study was investigated the contents of total polyphenol, flavonoids and antioxidant and antimicrobial activities of Codonopsis lanceolata extracts according to different steaming times. The contents of total polyphenol and flavonoid proportionally increased from 6.45 mgGAE/g to 18.26 mgGAE/g and 2.01 mgRE/g to 6.12 mgRE/g according to ethanol extracts at EDS7. DPPH radical scavenging activity was found to have been 15.26~65.2% and showed the highest level of antioxidant activity at EDS7 was 65.2%. The activity of ABTS radical scavenging and SOD-like activity were also the same result. DPPH and ABTS radical scavenging activity was related to the number of steaming, and the scavenging activity was increased up to 7 times of steaming. The antimicrobial activity of EDS7 had strong antioxidant activity. Antimicrobial activities were examined against 5 microorganisms related to pathogens and food poisoning. The antimicrobial Activity was different depending on the bacteria, but it was effective at the concentration of 300 mg/mL rather than 150 mg/mL. These results showed that Codonopsis lanceolata extracts with a different number of steaming would be conducted to confirm the possibility of developing antimicrobial and antioxidant. It will be helpful in the study of component analysis of Codonopsis lanceolata extracts processed products.
식물에서 추출한 천연 쿠마린계 염료를 이용한 염료감응 태양전지의 제조
이상수 ( Sang Soo Lee ),정온유 ( On Yu Jung ) 한국화학공학회 2013 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.51 No.1
Low priced and environment-friendly natural dye from coumarin- containing plants for the dye sensitized solar cell (DSSC) was developed. Dyes were extracted from cinnamon and angelica that contained coumarin derivatives, and DSSCs employing these dyes were prepared. PV efficiency of 0.75% was obtained from cinnamon dye, which is comparable to the highest efficiency reported in precedent studies about natural dye DSSC. It was confirmed by UVvisible and FT-IR spectroscopy that coumarin derivatives in the plants acted as photosensitive material.
한방치료를 병행하여 항결핵제의 부작용을 관리한 비결핵 항산균증 환자 1례
이지윤,장권준,양정민,문향란,고은비,윤민지,조온유,정성헌,신광순,신동국,황우석,Lee, Ji-yoon,Jang, Kwon-jun,Yang, Jung-min,Moon, Hyang-ran,Ko, Eun-bi,Yoon, Min-ji,Jo, On-yu,Jeong, Seong-heon,Shin, Kwang-soon,Shin, Dong-guk,Hwang, Woo-se 대한한방내과학회 2021 大韓韓方內科學會誌 Vol.42 No.5
Objectives: This study investigated the effect of combined Korean medical treatment and antibiotics on a patient diagnosed with nontuberculous mycobacterial lung disease. Methods: The patient had been treated with antibiotics since July 2020 concurrently with Maekmoondong-tang, Banhasasim-tang, Gwakhyangjunggi-san and Bojungikgi-tang. The improvement of symptoms was evaluated using scores for the numerical rating scale (NRS), the Medical Research Council (MRC) dyspnea scale, C-reactive protein (CRP) levels, and computed tomography (CT). Results: Following treatment, the NRS, MRC dyspnea scale and CT images significantly improved. Also, CRP levels remained in the normal range during treatment. Conclusions: Traditional Korean medical treatment combined with antibiotics could be effective for treating patients with nontuberculous mycobacterial lung disease.