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An evaluation of the influence of impurity concentration and composition in concrete on activation and radiation dose in the reactor facility

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辐射防护 2020年第6期40卷 486-490页

作者： jae Hyun KIM Myeong Hyeon WOO chang Ho SHIN Jong Kyung KIM Department of Nuclear Engineering Hanyang University222Wangsimni-roSeongdongSeoulKorea

The content analysis of radioactive waste and radiation dose evaluation is considered as one of the important factors in the reactor facility *** kind of buildings consists of the concrete for the most part and uses it as the structure and shield of the ***,the concrete has impurities such as cobalt,europium,nickel,and cesium with specific content depending on the production method or manufacturing *** radioactive nuclides generated from the fundamental components of concrete are considered that it is less contributed to the radiation dose because they are beta decay nuclides in ***,impurities of irradiated concrete in the reactor facilities,are considered occasionally an important evaluation factor for induced *** this study,the influence on the activation of impurities in concrete was evaluated from the radiation dose and induced activity *** calculation was evaluated at the bio-shield which is one of the areas with the highest neutron irradiation among the concrete structure in the reactor *** results show that radioactive nuclides with gamma decay were produced in these ***,the radiation dose of concrete with impurities was higher than concrete without *** increased radiation dose was quantified through the content of impurities.

关键词： radiation dose concrete impurity activation analysis

Impact of statin intensity on adverse cardiac and cerebrovascular events in older adult patients with myocardial infarction

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Journal of Geriatric Cardiology 2021年第8期18卷 609-622页

作者： In Tae Moon Si-hyuck Kang Wonjae Lee Youngjin Cho Jin Joo Park Yeonyee EYoon Il-Young Oh chang-Hwan Yoon Jung-Won Suh Tae-Jin Youn In-Ho Chae Dong-Ju Choi Young-Seok Cho Uijeongbu Eulji Medical Center Eulji University School of MedicineUijeongbuSouth Korea Seoul National University Bundang Hospital SeongnamSouth Korea Department of Cardiology Incheon Sejong HospitalIncheonSouth Korea

BACKGROUND There is insufficient evidence regarding the effect of high-intensity statin therapy in older *** study aimed to investigate the effects of high-intensity statin treatment on the clinical outcomes in older adults with myocardial infarc-tion(MI).METHODS Consecutive patients with MI aged at least 75 years were analyzed *** primary endpoint was major adverse cardiac and cerebrovascular events(MACCE),defined as a composite of all-cause death,MI,rehospitalization due to un-stable angina,repeat revascularization,and ischemic *** high-intensity group was compared to the low-to-moderate in-tensity group in the propensity score-matched *** Average age of total 546 patients was 81 *** them,84%of patients underwent percutaneous coronary *** unadjusted seven-year MACCE rate differed by statin intensity(high-intensity statin group:38%,moderate-intensity statin group:42%,low-intensity statin group:56%,and no-statin group:61%,P=0.004).However,among these groups,many baseline characteristics were significantly *** the 74 propensity score-matched pairs,which lacked any significant differences in all baseline characteristics,the high-intensity group had a significantly lower rate of MACCE than the low-to-moderate intensity group(37%vs.53%,P=0.047).Follow-up low-density lipoprotein cholesterol levels were significantly lower in the high-intensity group than that in the low-to-moderate intensity group(69.4±16.0 mg/dL vs.77.9±25.9 mg/dL,P=0.026).CONCLUSIONS In older adult patients with MI,the use of high-intensity statin caused significantly less occurrence of MACCE in comparison to that in low-to-moderate intensity for up to seven years of follow-up.

关键词： patients cardiac intensity

A case of hypereosinophilic syndrome presenting with intractable gastric ulcers

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World Journal of Gastroenterology 2009年第48期15卷 6129-6133页

作者： Tae Young Park chang Hwan Choi Suh Yoon Yang InSoo Oh In-Do Song Hyun Woong Lee Hyung Joon Kim jae Hyuk Do Sae Kyung chang Ah Ra Cho Young Joo Cha Department of Internal Medicine Chung-Ang University College of Medicine Department of Laboratory Medicine Chung-Ang University College of Medicine

We report a rare case of hypereosinophilic syndrome(HES)presenting with intractable gastric ulcers.A 71-year-old man was admitted with epigastric *** endoscopic findings revealed multiple,active gastric ulcers in the gastric *** underwent Helicobacter pylori(H pylori)eradication therapy followed by proton pump inhibitor(PPI)***,follow-up endoscopy at 4,6,10 and 14 mo revealed persistent multiple gastric ulcers without significant *** proportion of his eosinophil count increased to 43%(total count:7903/mm 3).Abdominal-pelvic and chest computed tomography scans showed multiple small nodules in the liver and both *** endoscopic biopsy specimen taken from the gastric antrum revealed prominent eosinophilic infiltration,and the liver biopsy specimen also showed eosinophilic infiltration in the portal tract and sinusoid.A bone marrow biopsy disclosed eosinophilic hyperplasia as well as increased cellularity of 70%.The patient was finally diagnosed with HES involving the stomach,liver,lung,and bone *** gastric ulcers do not improve despite H pylori eradication and prolonged PPI therapy,infiltrative gastric disorders such as HES should be considered.

关键词：胃溃疡顽固性嗜酸粒细胞嗜酸性粒细胞综合征扫描显示质子泵抑制剂价格指数

Formation of interfacial brittle phases sigma phase and IMC in hybrid titanium-to-stainless steel joint

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Transactions of Nonferrous Metals Society of China 2011年第A1期21卷 7-11页

作者： Min Ku LEE Jung Gu LEE Jong Keuk LEE Sung Mo HONG Sang Hoon LEE Jin Ju PARK jae Woo KIM chang Kyu RHEE Nuclear Materials Research Division Korea Atomic Energy Research Institute Daejeon 305-353 Korea

The microstructures of the brazed joints for commercially pure Ti and stainless steel were investigated by the applications of various filler alloys including Ag-, Ti-, Zr- and Ni-based alloys. Generally, the dissimilar joints between Ti and stainless steel were dominated by the Ti-based intermetallic compounds (IMCs), e.g. (Ti, Zr)2(Fe, Ni), TiFe, TiCu, and Ti2(Fe, Ni), due to a significant dissolution of Ti from the base metal. The (Fe-Cr) σ phase was also observed near the stainless steel due to a segregation of Cr into the interface region. This research demonstrates empirically that the brittleness of the Ti and stainless steel joint can not be avoided only by applying single braze alloy or single insert metal, and thus an introduction of additional suitable interlayer between the filler alloy and the base metal is necessary to prevent the brittleness of the joint.

关键词：不锈钢脆性相钢接头界面区纯钛 IMC 金属间化合物镍基合金

Materialization of strained CVD-graphene using thermal mismatch

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Nano Research 2015年第6期8卷 2082-2091页

作者： Seung-Mo Lee Sang-Min Kim Min Young Na Hye Jung chang Kwang-Seop Kim Hyunung Yu Hak-Joo Lee jae-Hyun Kim Nano-Convergence Mechanical Systems Research Division Korea Institute of Machinery & Materials (KIMM) 156 Gajungbuk-ro Yuseong-gu Daejeon 305-343 Republic of Korea Nano Mechatronics University of Science and Technology (UST) 217 Gajeong-ro Yuseong-gu Daejeon 305-333 Republic of Korea Graduate School of Energy Environment Water and Sustainability Korea Advanced Institute of Science & Technology (KAIST) Daejeon 305-701 Republic of Korea Department of Materials Science and Engineering Yonsei University SO Yonsei-ro Seodaemun-gu Seou1120-749 Republic of Korea Advanced Analysis Center Korea Institute of Science and Technology (KIST) Hwarang-ro 14-gil 5 Seongbuk-gu Seoul 130-791 Republic of Korea Korea Research Institute of Standards and Science (KRISS) 267 Gajeong-ro Yuseong-gu Daejeon 305-343 Republic of Korea

理论物理预知 graphene 的紧张工程能支配发现财富仍然隐藏在二维(2D ) 压缩了事物理和商品化的基于 graphene 的设备。然而，在大数量拉紧 graphene 生产不是由任何工具的一项容易的任务。这里，我们证明放在各种各样的底层上的 graphe... 详细信息

理论物理预知 graphene 的紧张工程能支配发现财富仍然隐藏在二维(2D ) 压缩了事物理和商品化的基于 graphene 的设备。然而，在大数量拉紧 graphene 生产不是由任何工具的一项容易的任务。这里，我们证明放在各种各样的底层上的 graphene 的热退火能是为与一个大区域准备拉紧的 graphene 的一个令人惊讶地简单的方法。我们在开发拉紧的 graphene 发现界面的粘附玩的那提高的 graphene 底层一个关键角色。考虑在 graphene 和目标底层之间的热失配的有创造性的设备体系结构能使产生紧张能有意被定制。我们相信我们的建议方法能建议一条捷径到 graphene straintronics 的实现。

关键词：热失配石墨应变 CVD 物化凝聚态物理理论物理界面粘合

Highly flexible and transparent conducting silver nanowire/ZnO composite film for organic solar cells

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Nano Research 2014年第9期7卷 1370-1379页

作者： Myungkwan Song Jong Hyun Park chang Su Kim Dong-Ho Kim Yong-Cheol Kang Sung-Ho Jin Won-Yong Jin jae-Wook Kang Surface Technology Division Korea Institute of Materials Science Changwon 641-831 Republic of Korea OLED Development Group LG Display Co. Ltd. Gyeonggi-do 413-811 Republic of Korea Department of Chemistry Pukyong National University 45 Yongso-ro Nam-Gu Busan 608-737 Republic of Korea Department of Chemistry Education Graduate Department of Chemical Materials and Institute for Plastic Information and Energy Materials Pusan National University Busan 609-735 Republic of Korea The Graduate School of Flexible and Printable Electronics Polymer Materials Fusion Research Center Chonbuk National University Jeonju 561-756 Republic of Korea

High efficiency and flexible inverted organic solar cells have been fabricated using solution-processed silver nanowire/zinc oxide composite transparent electrodes. The transparent electrodes showed a low sheet resistance of ∼13 Ω·sq−1 and high transmittance of ∼93% as well as superior mechanical flexibility. Power conversion efficiencies of ∼7.57% and ∼7.21% were achieved for devices fabricated on glass and plastic substrate, respectively. Moreover, the flexible devices did not show any degradation in their performance even after being folded with a radius of ∼480 μm.

关键词：有机太阳能电池银纳米线氧化锌透明导电复合膜功率转换效率透明电极溶液处理

Interplay between ABA and GA Modulates the Timing of Asymmetric Cell Divisions in the Arabidopsis Root Ground Tissue

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Molecular Plant 2016年第6期9卷 870-884页

作者： Shin Ae Lee Sejeong Jang Eun Kyung Yoon Jung-Ok Heo Kwang Suk chang Ji Won Choi Souvik Dhar Gyuree Kim Jeong-Eun Choe jae Bok Heo Chian Kwon jae-Heung Ko Yong-Sic Hwang Jun Lim Department of Systems Biotechnology Konkuk University Seour 05029 Korea Department of Molecular Biotechnology Dong-A University Busan 49201 Korea Department of Molecular Biology Dankook University Yongin 16890 Korea Department of Plant and Environmental New Resources Kyung Hee University Yongin 17104 Korea These authors contributed equally to this article. Present address: The Sainsbury Laboratory University of Cambridge Cambridge CB2 1LR United Kingdom Present address: Department of Life Science Research Institute for Natural Sciences Hanyang University Seoul 04763 Korea

In multicellular organisms, controlling the timing and extent of asymmetric cell divisions （ACDs） is crucial for correct patterning. During post-embryonic root development in Arabidopsis thaliana, ground tissue （GT） maturation involves an additional ACD of the endodermis, which generates two different tissues： the endo- dermis （inner） and the middle cortex （outer）. It has been reported that the abscisic acid （ABA） and gibberellin （GA） pathways are involved in middle cortex （MC） formation. However, the molecular mechanisms under- lying the interaction between ABA and GA during GT maturation remain largely unknown. Through transcriptome analyses, we identified a previously uncharacterized C2H2-type zinc finger gene, whose expression is regulated by GA and ABA, thus named GAZ （GA- AND ABA-RESPONSIVE ZINC FINGER）. Seedlings ectopically overexpressing GAZ （GAZ-OX） were sensitive to ABA and GA during MC formation, whereas GAZ-SRDX and RNAi seedlings displayed opposite phenotypes. In addition, our results indicated that GAZ was involved in the transcriptional regulation of ABA and GA homeostasis. In agreement with pre- vious studies that ABA and GA coordinate to control the timing of MC formation, we also confirmed the unique interplay between ABA and GA and identified factors and regulatory networks bridging the two hor- mone pathways during GT maturation of the Arabidopsis root.

关键词： ABA GA GRAS ground tissue root development transcription factor

Inhibitory effect of Jeju endemic seaweeds on the production of pro-inflammatory mediators in mouse macrophage cell line RAW 264.7

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第5期11卷 315-322页

作者： Eun-Jin YANG Ji-Young MOON Min-Jin KIM Dong Sam KIM Chan-Shick KIM Wook jae LEE Nam Ho LEE chang-Gu HYUN Jeju Biodiversity Research Institute(JBRI) Jeju High-Tech Development Institute(HiDI) Jeju 699-943Korea Jeju Seaweed Industry Development Agency Cheju National UniversityJeju 690-756Korea Faculty of Biotechnology Cheju National UniversityJeju 690-756Korea Department of Chemistry Cheju National UniversityJeju 690-756Korea

Seaweed has been used in traditional cosmetics and as a herbal medicine in treatments for cough,boils,goiters,stomach ailments,and urinary diseases,and for reducing the incidence of tumors,ulcers,and *** the fact that seaweeds are frequently used in the practice of human health,little is known about the role of seaweed in the context of *** study aimed to investigate the influence of Jeju endemic seaweed on a mouse macrophage cell line(RAW 264.7) under the stimulation of lipopolysaccharide(LPS).Ethyl acetate extracts obtained from 14 different kinds of Jeju seaweeds were screened for inhibitory effects on pro-inflammatory *** results revealed that extracts from five seaweeds,Laurencia okamurae,Grateloupia elliptica,Sargassum thun-bergii,Gloiopeltis furcata,and Hizikia fusiformis,were potent inhibitors of the production of pro-inflammatory mediators such as nitric oxide(NO),prostaglandin E2(PGE2),interleukin-6(IL-6),and tumor necrosis factor-α(TNF-α).Based on these results,the anti-inflammatory effects and low cell toxicity of these seaweed extracts suggest potential thera-peutic applications in the regulation of the inflammatory response.

关键词： Nitric oxide Interleukin-6(IL-6) Prostaglandin E2(PGE2) Tumor necrosis factor-α(TNF-α) Seaweeds Pro-inflammatory mediators

Identification of TRPM7 channels in human intestinal interstitial cells of Cajal

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World Journal of Gastroenterology 2009年第46期15卷 5799-5804页

作者： Byung Joo Kim Kyu Joo Park Hyung Woo Kim Seok Choi jae Yeoul Jun In Youb chang Ju-Hong Jeon Insuk So Seon Jeong Kim School of Korean Medicine Pusan National University Department of Surgery College of MedicineSeoul National University Department of Physiology College of MedicineChosun University Department of Anatomy College of MedicineChosun University Center for Bio-Artif icial Muscle and Department of Physiology College of MedicineSeoul National University Center for Bio-Artifi cial Muscle and Depart-ment of Biomedical Engineering Hanyang University

AIM:To investigate the characteristics of slow elec-trical waves and the presence of transient receptor potential melastatin-type 7(TRPM7)in the human gas-trointestinal(GI)***:Conventional microelectrode techniques were used to record intracellular electrical responses from human GI smooth muscle ***-chemistry was used to identify TRPM7 channels in in-terstitial cells of Cajal(ICCs).RESULTS:The human GI tract generated slow electri-cal waves and had ICCs which functioned as pacemak-er *** acid,a nonselective cation channel blocker,and 2-APB(2-aminoethoxydiphenyl borate)and La3+,TRPM7 channel blockers,inhibited the ***,TRPM7 channels were expressed in ICCs in human ***:These results suggest that the human GI tract generates slow waves and that TRPM7 chan-nels expressed in the ICCs may be involved in the gen-eration of the slow waves.

关键词：间质细胞胃肠道鉴定国际商会离子通道免疫组化非选择性人体组织