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조금연,이태희,조영일 연세대학교 산업기술연구소 1984 논문집 Vol.16 No.2
A biological wastewater treatment was studied in an aerated fixed-bed with synthetic organic wastes. A vertical column was packed with Raschig ring-type polyethylene tube, and wastewater and air were flowed upward cocurrently. The reactor response during unsteady state and the organic removal efficiency along the reactor height at steady state were investigated by the measurement of COD and SS concentrations. From the experimental results, the behavior of the reactor was found similar to that of PFR. High efficiency of organic removal was obtained without recirculation. When the organic loading was below 3.59 kg COD/㎥-day, the organic removal efficiency was obtained above 97%. Form the experimental data, the following relationship was found by multi-regression method. ??=0.45 ??
김진주,조금선,김주성,정현채,김범식,박명수,지근억,조주연,홍경섭 한국식품과학회 2020 Food Science and Biotechnology Vol.29 No.6
There have been many studies suggesting thatprobiotics are effective in patients with diarrhea-predominantirritable bowel syndrome (IBS-D). However, itsmechanism of action as well as prediction of response isstill to be elucidated. In the present study, to find outmetabolomic characteristics of probiotic effect in IBS-D,we compared IBS symptom changes and metabolomiccharacteristics in the subjects’ urine samples betweenmulti-strain probiotics (one strain of Lactobacillus sp. andfour strains of Bifidobacterium sp.) group (n = 32) andplacebo group (n = 31). After 8 weeks’ administration (3times/day), dissatisfaction in bowel habits and stool frequencieswere significantly improved. Also, probioticsgroup had significantly changed seven metabolites includingpalmitic acid methyl ester (PAME) and 4,6-dihydroxyquinoline, 4-(2-aminophenyl)-2,4-dioxobutanoicacid (DOBA). According to IBS-SSS and IBS-QoL questionnaires,IBS-SSS responders showed higher PAMElevels and IBS-QoL responders showed lower DOBAlevels. This suggests potential role of these metabolites as abiomarker to predict probiotics effect in IBS-D patients.
소음과 불꽃을 제거한 단상유도전동기의 아날로그식 기동기 설계
박수강(Su-Kang Park),조금배(Geum-Bae Cho),백형래(Hyung-Lae Baek),임양수(Yang-Su Lim),이성길(Sung-Kil Lee),임종연(Jong-Yeun Lim) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
This research used triac that is semi-conductor that act to static contact to overcome happened shortcoming been using mechanical centrifugal force switch usually. Detect starting current of single phase induction motor and decided moving time. Therefore, could improve life of switch semipermanently. Also, wish to reduced impact that electric motor suffers at the starting moment and do stable starting which there is no life improvement and noise of electric motor itself, arc.
반가영,예영민,김상하,허규영,김주희,심재정,조금선,조주연,박해심,PRANA group 대한천식알레르기학회 2017 Allergy, Asthma & Immunology Research Vol.9 No.4
The tools for asthma control assessment recommended by the current guideline are cognitive function- and effort-dependent, which is substantially impaired in the elderly. The aim of this study is to investigate objective assessment tools of asthma control status and previous asthma exacerbation (AE) in elderly subjects. Asthmatics aged >60 years who were treated with step 2 or 3 by the Global Initiative for Asthma (GINA) guideline were enrolled. During the 12-week study period, the subjects used either 400 μg of budesonide plus 10 mg of montelukast or 800 μg of inhaled budesonide. The occurrence of AE during the 4-week run-in and 12-week treatment period was monitored. After 12-week of treatment, sputum eosinophil count, peripheral eosinophil count, the plasma leukotriene E4 (LTE4), and prostaglandin F2α (PGF2α) metabolite levels were measured using the UHPLC/Q-ToF MS system. The study subjects were divided into group 1 (asthmatics who experienced AE during the study period) and group 2 (those who did not). A total of 101 patients aged 60-85 years were enrolled. Twenty-three patients (22.8%) had experienced AE. The plasma LTE4 level, LTE4/PGF2α ratio, and peripheral eosinophil count were significantly higher in group 1 than in group 2 (P=0.023, P=0.010, P=0.033, respectively). The plasma LTE4/PGF2α ratio and peripheral eosinophil count at week 12 were significantly associated with previous AE (odds ratio [OR]=1.748, P=0.013; OR=1.256, P=0.027). Receiver operating characteristic (ROC) curves to discriminate the subjects with previous AE, including these 2 parameters, showed that the area under the curve was 0.700 (P=0.004), with 73.9% sensitivity and 47.9% specificity. In conclusion, a combination of plasma LTE4/PGF2α ratio and peripheral eosinophil count can be an objective assessment tool which is significantly associated with asthma control status in elderly asthmatics.