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PREPARATION AND PROPERTIES OF MMA/1-PROPYLMETHACRYLATE-POSS COPOLYMER WITH ATOM TRANSFER RADICAL POLYMERIZATION

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Chinese Journal of Polymer Science 2008年第5期26卷 533-537页

作者： He-xin Zhang ho-young Lee young-jun shin Dong-ho Lee Seok Kyun Noh Department of Polymer Science and Engineering Kyungpook National UniversityDaegu 702-701Korea School of Display and Chemical Engineering Yeungnam UniversityGyeongsan 712-749Korea

The methyl methacrylate(MMA)/1-propylmethacrylate-polyhedral oligomeric silsesquioxane(PM-POSS) copolymers were synthesized via atom transfer radical polymerization with CuBr as *** unreacted PM-POSS monomer could be removed completely by washing the copolymerization product with *** copolymers were characterized with ~1H-NMR,X-ray diffraction,differential scanning calorimetry,thermogravimetric analysis and gel permeation *** increasing PM-POSS feed ratio,the total conversi...

关键词： Methyl methacrylate(MMA) Polyhedral oligomeric silsesquioxane(POSS) Copolymer ATRP

Long-term clinical outcome between beta-blocker with ACEI or ARB in patients with NSTEMI who underwent PCI with drug-eluting stents

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Journal of Geriatric Cardiology 2019年第3期16卷 280-290页

作者： Yong hoon Kim Ae-young Her Eun-Seok shin Myung ho Jeong Division of Cardiology Department of Internal MedicineKangwon National University School of MedicineChuncheonSouth Korea Division of Cardiology Department of Internal MedicineUlsan Medical CenterUlsan HospitalUlsanSouth Korea Chonnam National University hospital GwangjuSouth Korea

Background Because limited comparative data are available,we decided to compare 2-year major clinical outcomes between beta-blockers (BB) with angiotensin converting enzyme inhibitors (ACEI) and BB with angiotensin receptor blockers (ARB) therapy in patients with non-ST-segment elevation myocardial infarction (NSTEMI) after percutaneous coronary intervention (PCI) with drug-eluting stents (DES).Methods A total 11,288 NSTEMI patients who underwent PCI with DES were enrolled and they were divided into two groups,the BB with ACEI group (n = 7600) and the BB with ARB group (n = 3688).The major clinical endpoint was the occurrence of major adverse cardiac events (MACE) defined as all-cause death,recurrent myocardial infarction (re-MI),total revascularization [target lesion revascularization (TLR),target vessel revascularization (TVR),non-TVR] rate during the 2-year follow-up *** After propensity score-matched (PSM) analysis,two PSM groups (3317 pairs,n = 6634,C-statistic = 0.695) were *** the cumulative incidences of all-cause death,cardiac death,TLR,and non-TVR were similar between the two groups,MACE (HR = 0.832,95% CI: 0.704?0.982,P = 0.030),total revascularization rate (HR = 0.767,95% CI: 0.598?0.984,P = 0.037),and TVR rate (HR = 0.646,95% CI: 0.470?0.888,P = 0.007) were significantly lower in the BB with ACEI group after *** In this study,we suggest that the combination of BB with ACEI may be beneficial for reducing the cumulative incidences of MACE,total revascularization rate,and TVR rather than the BB with ARB after PCI with DES in NSTEMI patients.

关键词： Angiotensin converting enzyme inhibitor Angiotensin receptor blocker Beta-blocker Myocardial infarction

Electrical Stimulation of Auricular Acupressure for Dry Eye:A Randomized Controlled-Clinical Trial

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Chinese Journal of Integrative Medicine 2017年第11期23卷 822-828页

作者： Jong Soo Lee Sang ho Hwang Byung Cheul shin young Min Park Department of Ophthalmology School of MedicinePusanNational University and Medical Research InstitutePusan National University HospitalPusan(602-739)Republic of Korea Department of Ophthalmology Jung's Eye CenterPusan(616-849)Republic of Korea Division of Clinical Medicine School of Korean MedicinePusan National UniversityYangsan(626-870)Republic of Korea Department of Ophthalmology Gyeongsang National University School of MedicineGyeongsang National University Changwon HospitalChangwon(51472)Republic of Korea

Objective： To evaluate the clinical efficacy of electrical stimulation（ES） of auricular acupressure on reducing the ocular symptoms and signs before and after treatment for dry eye. Methods： The inclusion criteria were the tear film break-up time（TFBUT） below 5 s and a Schirmer test-Ⅰ below 5 mm in dry eyes with ocular symptoms for at least 6 months. Subjects were randomized into a treatment group（50 cases） with continuous low frequency ES under auricular acupressure at acupoints and a no ES under auricular acupressure（no-ES, control group, 50 cases） on the same acupoints. Auricular acupressure were stimulated with ES at 4 master points of both ears, which were performed twice a week for 4 weeks at each point for 30 s. The ocular symptoms, the TFBUT, and Schirmer test-Ⅰ were evaluated before and after this procedure. Results： There were significantly better scores in TFBUT（P=0.032）, the Schirmer test-Ⅰ（P=0.044） and ocular symptoms（P=0.029） at 3 months post-treatment in the treatment group than in the control group. The total effective rate in the treatment group was accomplished in 41（82%） of the 50 cases of dry eye. Conclusions： Auricular acupressure with ES at auricular acupoint improves ocular symptoms and signs of dry eye for a period of at least 3 months.

关键词： auricular acupressure dry eye syndromes electrical stimulation tears

Distribution of dinoflagellate cysts in Yellow Sea sediments

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Acta Oceanologica Sinica 2013年第9期32卷 91-98页

作者： shin Hyeon ho LIM Dhongil PARK Soung-Yun HEO Seung KIM So-young Library of Marine Samples Korea Institute of Ocean Science and Technology West Sea Fisheries Research Institute National Fisheries Research&Development Institute Division of Polar Climate Research Korea Polar Research Institute

To investigate the distribution, abundance, and species composition of dinoflagellate cysts in the Yellow Sea, surface sediment samples were collected at 37 sites, including the Korean dump site. Twenty-one di- noflagellate cyst taxa were identified, with the assemblages dominated mainly by Spiniferites bulloideus, Operculodinium centrocarpum, and cyst of Alexandrium catenella/tarnarense type. A high frequency of O. centrocarpum in the Yellow Sea was observed for the first time, and it is likely that this can be attributed to the dynamics of the Yellow Sea Cold Water Mass and the Changjiang （Yangtze） River runoff. Total cyst concentrations ranged from 23 to 48 442 cysts/g dry weight, and high cyst concentrations were recorded adjacent to the dumping site. This result suggests that anthropogenic activities such as ocean dumping s- timulate the growth of dinoflagellates in the Yellow Sea, which in turn leads to high levels of dinoflagellate cyst production.

关键词： Yellow Sea dumping site dinoflagellate cyst Alexandrium catenella/tamarense type Operculo- dinium centrocarpum

The contribution of gender and age on early and late mortality following ST-segment elevation myocardial infarction： results from the Korean Acute Myocardial Infarction National Registry with Registries

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Journal of Geriatric Cardiology 2018年第3期15卷 205-214页

作者： Ae-young Her Etm-Seok shin Yong hoon Kim Scot Garg Myung ho Jeong Division of Cardiology Department of Internal Medicine Kangwon National University School of Medicine Chuncheon South Korea Department of Cardiology Ulsan University Hospital University of Ulsan College of Medicine Ulsan Republic of Korea East Lancashire hospitals NHS Trust Blackburn Lancashire UK The Heart Center of Chonnam National University hospital Gwangju Republic of Korea

Background Although previous studies using Korean data have already reported higher rates of mortality in women, it is less clear whether these gender differences in prognosis post ST-segment elevation myocardial infarction （STEMI）, are age dependent. The aim of this study is to examine the gender-age interaction with early and late mortality in patients with STEMI enrolled in the Korean nationwide regis-try. Methods This prospective study stratified outcomes according to gender and age from 17,021 STEMI patients. We compared in-hospital, early （30 days） and late （12 months） mortality between gender to examine the gender-age interaction in multivariable models. Results In younger women （〈 60 years）, in-hospital [5.8% vs. 2.5%, P 〈 0.001; unadjusted odds ratios （OR）： 2.41, 95% confidence inter-vals （CI）： 1.59-3.66], early （6.2% vs. 2.6%, P 〈 0.001; unadjusted OR： 2.4, 95% CI： 2.12-2.72） and late mortality （7.0% vs. 3.1%, P 〉 0.001; unadjusted OR： 2.33, 95% CI： 2.08-2.61） were significantly higher compared with men. however, after adjustment for patient characteristics, Killip class ≥ 3, symptom to balloon time and major bleeding, and in-hospital bleeding, overall early and late mortality were no longer re-lated to gender in any age groups. Conclusions Among a Korean population with STEMI, higher early and late mortality in younger women may be explained by poor patient characteristics, higher Killip class ≥3, longer symptom to balloon time and more frequent major bleeding. Therefore, based on gender-age differences, more precise and aggressive preventive strategies focused on risk factor reduction, education and more intensive management for yotmger women should be performed.

关键词： Age Gender Mortality ST-segment elevation myocardial infarction

Random lasing detection of structural transformation and compositions in silk fibroin scaffolds

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Nano Research 2019年第2期12卷 289-297页

作者： SungYeun Yang Soocheol Kim Hyeln shin Seung ho Choi young L. Kim Chulmin Joo WonHyoung Ryu Department of Mechanical Engineering Yonsei University Yonsei-ro 50 Seodaemun-gu Seoul 03722 Republic of Korea Weldon School of Biomedical Engineering Purdue University West Lafayette Indiana 47907 USA Present address: Center of Bio Microsystems Korea Institute of Science and Technology (KIST) Hwarang-ro Seongbuk-gu Seoul 02792 Republic of Korea School of Electrical Engineering University of Ulsan Daehak-ro Nam-gu Ulsan 44610 Republic of Korea

In tissue engineering, microstructure and material composition of tissue scaffolds have major influences on the proliferation and differentiation of cells in the scaffolds. however, once tissue scaffolds implanted, it is extremely difficult to monitor the change of their microstructure and compositions during tissue regeneration. Here, we report how random lasing can be utilized to non-invasively monitor the structure and composition of scaffolds. We hypothesize that morphological and compositional change of silk fibroin (SF) scaffolds can be conveniently detected based on random lasing responses. Engineered SF scaffolds with hydroxyapatite (HAP) nanoparticles and controlled pore alignment were fabricated, and their random lasing responses were analyzed depending on the concentration of HAP nanoparticles and the degree of,:internal pore alignment. We also examined the real-time random lasing responses of porous SF scaffolds by applying a compressive force to' the scaffolds. Introduction of HAP nanoparticles lowered the lasing thresholds and narrowed the random lasing (RL) width dramatically, which :is likely due to the increase in heterogeneity in both refractive index and physical arrangement within the SF and HAP composites. The strong dependency of RL response on pore alignment was also measured and validated by numerical calculation with the finite element method (FEM).Finally, real-time monitoring of RL on compressed scaffolds demonstrated the possibility of using RL as a monitoring tool for structural change of SF scaffolds in vivo.

关键词： random lasing silk fibroin porous scaffolds aligned pore structure electrospinning hydroxyapatite

Sorption enhanced catalytic CF4 hydrolysis with a three-stage catalyst-adsorbent reactor

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Frontiers of Chemical Science and Engineering 2017年第4期11卷 537-544页

作者： Jae-Yun Han Chang-Hyun Kim Boreum Lee Sung-Chan Nam ho-young Jung Hankwon Lim Kwan-young Lee shin-Kun Ryi . Advanced Materials and Devices Laboratory Korea Institute of Energy Research (KIER) Daejeon 34129 Korea.. Department of Advanced Materials and Chemical Engineering Catholic University of Daegu Gyeongbuk 38430 Korea.. Department of Environment and Energy Engineering Chonnam National University Gwangju 61186 Korea.. Department of Chemical and Biological Engineering Korea University Seoul 136-701 Korea

In this study, we developed a three-stage catalyst-adsorbent reactor for the catalytic hydrolysis of CF4. Each stage is composed of a catalyst bed followed by an adsorbent bed using Ca（OH）2 to remove HF. The three stages are connected in series to enhance the hydrolysis of CF4 and eliminate a scrubber to dissolve HF in water at the same time. With a 10 wt-% Ce/AlaO3 catalyst prepared by the incipient wetness method using boehmite and a granular calcium hydroxide as an adsorbent, the CF4 conversion in our proposed reactor was 7%-23% higher than that in a conventional single-bed catalytic reactor in the temperature range of 923-1023 K. In addition, experimental and numerical simulation （Aspen HYSYS） results showed a reasonable trend of increased CF4 conversion with the adsorbent added and these results can be used as a useful design guideline for our newly proposed multistage reactor system.

关键词： PFCs catalytic hydrolysis calcium hydro-xide sorption enhanced process simulation

Preliminary experimental study of a supercritical CO2 power cycle test loop with a high-speed turbo-generator using R134a under similarity conditions

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Frontiers in Energy 2017年第4期11卷 452-460页

作者： Junhyun Cho Hyungki shin Jongjae Cho young-Seok KANG ho-Sang RA Chulwoo ROH Beomjoon LEE Gilbong LEE Byunghui KIM young-Jin BAIK Thermal Energy System Laboratory Korea Institute of Energy Research 152 Gajeong-ro Yusung-gu Daejeon 34129 Republic of Korea Engine Component Research Team Korea Aerospace Research Institute (KARl) 169-84 Gwahak-ro Yusung-gu Daejeon 34133 Republic of Korea InGineers 21 Saman-ro 16 Beon-gil Gimhae-si Gyeongsangnam-do 621-220 Republic of Korea

Research on applying a supercritical carbon dioxide power cycle （S-CO2） to concentrating solar power （CSP） instead of a steam Rankine cycle or an air Brayton cycle has been recently conducted. An S-CO2 system is suitable for CSP owing to its compactness, higher efficiency, and dry-cooling capability. At the Korea Institute of Energy Research （KIER）, to implement an S-CO2 system, a 10 kWe class test loop with a turbine- alternator-compressor （TAC） using gas foil bearings was developed. A basic sub-kWe class test loop with a high- speed radial type turbo-generator and a test loop with a capability of tens of kWe with an axial type turbo- generator were then developed. To solve the technical bottleneck of S-CO2 turbomachinery, a partial admission nozzle and oil-lubrication bearings were used in the turbo- generators. To experience the closed-power cycle and develop an operational strategy of S-CO2 operated at high pressure, an organic Rankine cycle （ORC） operating test using a refrigerant as the working fluid was conducted owing to its operational capability at relatively low- pressure conditions of approximately 30 to 40 bar. By operating the sub-kWe class test loop using R134a as the working fluid instead of CO2, an average turbine power of 400 W was obtained.

关键词： supercritical CO2 power cycle turbomachin-ery compressor turbine

Purtscher-like retinopathy with macular ischemia as the initial presentation of Behcet's disease

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International Journal of Ophthalmology(English edition) 2022年第3期15卷 520-522页

作者： Min ho shin Woong Sun Yoo Ji Sung Jung In young Chung Department of Ophthalmology Chosun University HospitalGwangju 61453Republic of Korea Department of Ophthalmology Gyeongsang National University HospitalJinju 52727Republic of Korea

Dear Editor,We would like to present a case report of Purtscher-like retinopathy (PLR) with macular ischemia as the initial presentation of Behcet’s disease (BD).

关键词： ischemia Behcet macular