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Jong-Il Park,Young-Guk Ko,Seung-Jun Lee,Chul-Min Ahn,Seung-Woon Rha,Cheol-Woong Yu,Jong Kwan Park,Sang-Ho Park,Jae-Hwan Lee,Su-Hong Kim,Yong-Joon Lee,Sung-Jin Hong,Jung-Sun Kim,Byeong-Keuk Kim,Myeong- The Korean Society of Cardiology 2024 Korean Circulation Journal Vol.54 No.2
Background and Objectives: The popliteal artery is generally regarded as a "no-stent zone." Limited data are available on the outcomes of drug-coated balloons (DCBs) for popliteal artery disease. This study aimed to evaluate the 12-month clinical outcomes among patients who received DCB treatment for atherosclerotic popliteal artery disease. Methods: This prospective, multicenter registry study enrolled 100 patients from 7 Korean endovascular centers who underwent endovascular therapy using IN.PACT DCB (Medtronic) for symptomatic atherosclerotic popliteal artery disease. The primary endpoint was 12-month clinical primary patency and the secondary endpoint was clinically driven target lesion revascularization (TLR)-free rate. Results: The mean age of the study cohort was 65.7±10.8 years, and 77% of enrolled patients were men. The mean lesion length was 93.7±53.7 mm, and total occlusions were present in 45% of patients. Technical success was achieved in all patients. Combined atherectomy was performed in 17% and provisional stenting was required in 11%. Out of the enrolled patients, 91 patients completed the 12-month follow-up. Clinical primary patency and TLR-free survival rates at 12 months were 76.0% and 87.2%, respectively. A multivariate Cox regression analysis identified female and longer lesion length as the significant independent predictors of loss of patency. Conclusions: DCB treatment yielded favorable 12-month clinical primary patency and TLR-free survival outcomes in patients with popliteal artery disease.
Yu, Long-Hao,Lee, Eui-Soo,Chen, Hong-Sheng,Jeong, Jong-Youn,Choi, Yun-Sang,Lim, Dong-Gyun,Kim, Cheon-Jei Korean Society for Food Science of Animal Resource 2011 한국축산식품학회지 Vol.31 No.5
The aim of this study was to compare the physicochemical changes of hot-boned chicken breast and leg muscles. Chicken breast and leg muscles from 56 broilers were excised within a 15 min post-mortem (PM) and stored at $20^{\circ}C$. Physicochemical traits were determined at 0.5, 6, 12, and 24 h PM. The ultimate pH of leg muscle was higher than that of breast muscle (p<0.05). The content of glycogen in the breast muscle was relatively higher than that in the leg muscle until 6 h PM (p<0.05). R-values showing rigor mortis of breast and leg muscles were completed after or before 6 h PM. Breast muscle had less cooking loss than leg muscle (p<0.05). Drip loss did not significantly differ between breast and leg muscles with the exception of that at 6 h PM. The sarcomere length of leg muscle was relatively longer than that of breast muscle (p<0.05). The MFI of leg muscle was significantly lower than that of breast muscle (p<0.05). The shear force of leg muscle was lower than that of breast muscle at 6 and 12 h PM (p<0.05); however, that of both muscles did not significantly differ at 24 h PM.
Yu, Jong-Sung,Larry Kevan 순천대학교 기초과학연구소 1991 基礎科學硏究誌 Vol.2 No.-
The catalytic oxidation of propylene over copper(Ⅱ)-exchanged X and Y zeolites in the presence of the different major cocations, Mg^2+, Ca^2+, Li^+, Na^+, K^+, and H^+, was studied as a function of the oxygen/propylene mole ratio in a flow system at 350℃. The yield of acrolein was optimized for a ratio of unity. The catalytic activities and the changes in cupric ion species were studied by gas chromatography and electron spin resonance. The catalytic activity for this reaction is shown to be due to copper species and is greatly dependent on the type of major cocation in the zeolites. Y zeolites are slightly more effective for the selective oxidation of propylene to acrolein than the corresponding X zeolites. The dependence of the product yields and the Cu(Ⅱ) concentration on the oxygen/propylene mole ratio indicates two parallel pathways for partial oxidation to acrolein and complete oxidation to carbon dioxide and water. It is suggested that partial oxidation is catalyzed by Cu(Ⅰ), perhaps in a Cu_2O/CuO phase, and that complete oxidation is catalyzed by Cu(Ⅱ). An induction period for acrolein formation is observed. Catalyst deactivation is also observed and associated with coke formation which can be monitored by a singlet electron spin resonance signal.
Increased HoxB4 Inhibits Apoptotic Cell Death in Pro-B Cells
Sung-Won Park,Kyung-Jong Won,Yong-Soo Lee,Hye Sun Kim,Yu-Kyung Kim,Hyeon-Woo Lee,Bokyung Kim,Byeong Han Lee,Jin-Hoi Kim,Dong-Ku Kim 대한생리학회-대한약리학회 2012 The Korean Journal of Physiology & Pharmacology Vol.16 No.4
HoxB4, a homeodomain-containing transcription factor, is involved in the expansion of hematopoietic stem cells and progenitor cells in vivo and in vitro, and plays a key role in regulating the balance between hematopoietic stem cell renewal and cell differentiation. However, the biological activity of HoxB4 in other cells has not been reported. In this study, we investigated the effect of overexpressed HoxB4 on cell survival under various conditions that induce death, using the Ba/F3 cell line. Analysis of phenotypical characteristics showed that HoxB4 overexpression in Ba/F3 cells reduced cell size, death, and proliferation rate. Moreover, the progression from early to late apoptotic stages was inhibited in Ba/F3 cells subjected to HoxB4 overexpression under removal of interleukin-3-mediated signal, leading to the induction of cell cycle arrest at the G2/M phase and attenuated cell death by Fas protein stimulation in vitro. Furthermore, apoptotic cell death induced by doxorubicin-treated G2/M phase cell-cycle arrest also decreased with HoxB4 overexpression in Ba/F3 cells. From these data, we suggest that HoxB4 may play an important role in the regulation of pro-B cell survival under various apoptotic death environments.
Seasonal Patterns of Bird Migration at a Stopover Site during the Migratory Period
Yu-Seong Choi,Sung-Hyun Kim,Jong-Seong Son,Seung-Gu Kang,Wee-Haeng Hur,Sang-Hoon Han 한국조류학회II 2013 한국조류학회지 Vol.20 No.1
This study focused on the seasonal pattern of migrant birds on an island that is used as a stopover site when they cross the Korean peninsula. Surveys were conducted on Oeyeon Island (N36°13′38″, E126°04′53″), which is located in the middle area of West Sea of Korea, during the spring (from March to May) and autumn (from September to November) migration seasons of 2011 and 2012. Increased number of individuals and species were observed on the Oeyeon Island during the spring season migration compared to the autumn season migration (mean±SD; species, spring 70.0±25.1 vs. autumn 49.0±9.1; individuals, spring 606.1±259.8 vs. autumn 280.9±77.2). Furthermore, this pattern was also observed for passerine birds (species, spring 47.6±17.4 vs. autumn 30.3±6.9; individuals, spring 518.7±263.6 vs. autumn 219.8±85.8). We suggest that physiological and ecological factors cause differences in the bird migration patterns between spring and autumn on the Korean islands, such as differences in the need for refueling after long-distance flight, selective pressure during the breeding season, and seasonal variation in the migration routes.
Identification of Microbes on the Single Fungus Fermented Tea by Pyrosequencing
Yu Seok Jeong,Sang Gi Park,Kyoung Hwan Cho,Yong Duck Kim,Jeong Gye Hwang,Gyeong Hyun Son,Jong Cheol Kim 한국차학회 2015 한국차학회지 Vol.- No.S
The high quality Chinese Fuzhuan brick-tea grows mainly a yellow colored fungus, Eurotium sp. which is called as a golden flowering tea. It is known that Eurotium species are the sexual states of Aspergillus species. A few studies reveal that extracts from microbial fermented teas contain natural antimicrobial components that have inhibitive effect on several food-borne pathogen and spoilage bacteria. In this study, golden flowering teas were manufactured using inoculated a single fungus, E. cristatum, fermented and identified the microbes in the fermented teas by means of pyrosequencing. The microbial fermented tea, which grows yellow colored fungi was manufactured through 5-step processing such as mother-tea preparation, inoculation, fermentation, ripeness and desiccation. The manufacturing processes were already applied to nation patent (2014-0010502). In order to grouping the microbes and survey some contamination with harmful microbes, the pyrosequencing was performed on 8-samples manufactured different conditions. The result have shown that the phylum was Ascomycota 99.8%, the class was Eurotiomycetes 99.8% among total 27 class, the order was Eurotiales 99.6~99.8% among total 41 order, the family was Trichocomaceae 99.6~99.8% among 48 family, and the genus was Aspergillus 94.3~97.9% among 63 genus. The8-samples had 100% similarity in above 5-classification except genus level, otherwise the genus level have shown 94.3~97.9% of Aspergillus and 1.8~5.3% of Penicillium. The microbial fermented tea was manufactured successfully by single fungus inoculation. The pyrosequencing results indicate that the genus Aspergillus is existed dominantly in the tea which is the asexual name of Eurotium.
Yu, Jong-sung,Larry Kevan 순천대학교 기초과학연구소 1992 基礎科學硏究誌 Vol.3 No.-
The effects of reoxidation and water vapor on the selective partial oxidation of propylene to acrolein over Cu(II)-exchanged X and Y zeolites were examined as a function of the oxygen-to-propylene mole ratio in a flow system at 350℃. The catalytic activity and the reduction of cupric ion species during reaction were studied by gas chromatography and electron spin resonance spectroscopy. The effects of both reoxidation and water vapor introduction resulted in a selective increase of acrolein formation during reaction. The cupric ion intensity in the zeolite decreases during propylene oxidation at low oxygen-to-propylene mole ratios. Reoxidation after propylene oxidation is suggested to increase the formation of copper oxides, CuO and Cu_2O, in the zeolite framework. Cuprous oxide formed during the reaction is suggested to be an active species for the partial oxidation of propylene to acrolein. The introduction of water vapor decreases Cu(II) reduction and decreases coke formation in the zeolite, this decreases catalyst deactivation during reaction. After introduction of water vapor, cuprous ion in an exchange site and cuprous oxide are suggested to be active for acrolein formation.
Yu,Jong-Sung,Larry Kevan,Vadim Kurshev,Back,Gern-Ho 國立昌原大學校 基礎科學硏究所 1994 基礎科學硏究所論文集 Vol.6 No.-
EPR and electron spin-echo modulation (ESEM) spectroscopies have been used to monitor the location of Pd' and its interaction with water, methanol, ethanol, ethene, benzene, carbon monoxide and ammonia in silicoaluminophosphate type 34(SAPO-34) molecular sieve containing Pd'' by ion exchange. After activation at 600℃, three different Pb' species are observed: A₁(g1=2,177), A₂(g1=2.136) and A₃(g1=2,070) with a common gⅡ=2.92. These correspond to three different site locations in the framework. A₁is assigned to the least accessible site Ⅲ in the centre of a hexagonal prism. A₃ to site I displaced from a six-ring into the ellipsoidal cage and A₂ to the most accessible site Ⅳ near an eight-ring window based on adsorption of oxygen and hydrogen and 31P modulations from the SAPO framework observed by ESEM. Oxygen and water oxidize Pd' ions in an activated sample to Pd'' ions complexed to O₂-, indicating water decomposition. Adsorption of methanol and ethanol causes a change in the EPR spectrum which indicates some relocation of Pd'to allow better coordination with one molecule of the alcohol. Exposure to ethene also changes the EPR spectrum, indicating interaction of Pd' with it. ESEM shows that the Pd' species coordinates to one ethene molecule. The adsorption of carbon monoxide results in a Pd' complex with three molecules of carbon monoxide based on resolved 13C superhyperfine splittings. Upon adsorption of ammonia, one molecule of ammonia coordinates to Pd' based on resolved nitrogen hyperfine coupling.