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미세액적 광생물반응기를 활용한 광독립영양배양에서 Chlamydomonas reinhardtii의 성장성 분석
성영준 ( Young Joon Sung ),곽호석 ( Ho Seok Kwak ),최홍일 ( Hong Il Choi ),김영환 ( Jaoon Young Hwan Kim ),심상준 ( Sang Jun Sim ) 한국화학공학회 2017 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.55 No.1
Recently, microalgae which can produce high-value products have attracted increasing attention for biological conversion of CO<sub>2</sub>. However, low photosynthetic efficiency and productivity have limited the practical use of microalgae. Thus, we developed microdroplet photobioreactor for the analysis of photoautotrophic growth of model alga, Chlamydomonas reinhardtii. CO<sub>2</sub> transfer rate was increased by integrating micropillar arrays and adjusting height of microchamber. These results were identified by change of cell growth rate and fluorescence intensity. Lastly, the photoautotrophic growth kinetics of C. reinhardtii in microdroplet photobioreactor were investigated under different CO<sub>2</sub> concentrations and light intensities for 96 hours. As a result, microdroplet photobioreactor was efficient platform for isolation and rapid evaluation of microalgal strains which have enhanced productivity of high-value products and growth performance.
만성 신질환 심방 세동 환자에서 혈전 색전증의 독립적 위험인자
오규철 ( Gyu Chul Oh ),차명진 ( Myung Jin Cha ),강도윤 ( Do Yoon Kang ),김지영 ( Ji Yeong Kim ),성영준 ( Young Jun Sung ),윤정한 ( Jung Han Yoon ),이동원 ( Dong Won Lee ),이민호 ( Min Ho Lee ),최원석 ( Won Seok Choe ),최의근 ( Eue 대한내과학회 2011 대한내과학회지 Vol.81 No.4
Background/Aims: The CHADS2 scoring system has been widely used to stratify thromboembolic risk associated with atrial fibrillation. Chronic kidney disease (CKD) is associated with increased risk of stroke in patients with atrial fibrillation (AF) but has not yet been included in risk-scoring systems. We analyzed the difference in thromboembolic risk of patients with AF and a moderate risk of stroke according to the presence of CKD. Methods: Of 1,952 patients with AF, 451 with a CHADS2 score of 1 were divided into two groups according to the presence of CKD, and thromboembolic events were analyzed. Each group was further classified by the antithrombotic regimen used: warfarin or aspirin. Results: Of the 451 patients, 94 with CKD had a significantly higher risk for thromboembolic complications than the 357 patients without CKD (hazard ratio [HR], 3.630; 95% confidence interval [CI], 1.565-8.422; p=0.003). Patients with CKD who were on aspirin had a higher risk for thromboembolic events than those on warfarin (HR, 5.203; 95% CI, 1.056-25.633, p=0.043). However, in patients without CKD, the aspirin group did not have a higher risk of thromboembolic events than the warfarin group (HR, 0.803; 95% CI, 0.225-2.867, p=0.735). Conclusions: In Korean patients with AF and a CHADS2 score of 1, CKD may be an independent thromboembolic risk factor. In patients with CKD, warfarin may be superior to aspirin for lowering thromboembolic risk. (Korean J Med 2011;81:464-469)