检索结果-南通市图书馆

High-temperature corrosion of sintered Re_(2)Si_(2)O_(7)(Re=Yb and Ho)environmental barrier coating materials by volcanic ash

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2024年第7期31卷 1628-1638页

作者： Ayahisa Okawa Son thanh nguyen Tadachika Nakayama thi-Mai-Dung Do Hisayuki Suematsu Shu Yin Takuya Hasegawa Tsuneo Suzuki Takashi Goto Koichi Niihara Institute of Multidisciplinary Research for Advanced Materials Tohoku UniversitySendai 980-8577Japan Department of Creative engineering National Institute of TechnologyKushiro 084-0916Japan extreme energy-Density Research Institute Nagaoka University of TechnologyNagaoka 940-2188Japan Advanced Institute for Materials Research(WPI-AIMR) Tohoku UniversitySendai 980-8577Japan

Rare-earth silicates are promising environmental barrier coatings(eBCs)that can protect SiC_(f)/Si C_(m)substrates in next-genera tion gas turbine ***,Re_(2)Si_(2)O_(7)(Re=Yb and Ho)shows potential as an eBC due to its coefficient of thermal expansion(CTe)compatible with substrates and high resistance to water vapor *** target operating temperature for next-generation tur bine blades is 1400°*** is inevitable during adhesion to molten volcanic ash,and thus,understanding the corrosion behavior o the material is crucial to its *** study investigates the high-temperature corrosion behavior of sintered Re_(2)Si_(2)O_(7)(Re=Yb and Ho).Samples were prepared using a solid-state reaction and hot-press *** were then exposed to volcanic ash at 1400°C for 224,and 48 *** 48 h of exposure,volcanic ash did not react with Yb_(2)Si_(2)O_(7)but penetrated its interior,causing *** Ho_(2)Si_(2)O_(7)was partially dissolved in the molten volcanic ash,forming a reaction zone that prevented volcanic ash melts from penetrating the *** increasing heat treatment time,the reaction zone expanded,and the thickness of the acicular apatite grains increased the Ca:Si ratios in the residual volcanic ash were mostly unchanged for Yb_(2)Si_(2)O_(7)but decreased considerably over time for Ho_(2)Si_(2)O_(7).th Ca in volcanic ash was consumed and formed apatite,indicating that Re^(3+)ions with large ionic radii(Ho>Yb)easily precipitated apatit from the volcanic ash.

关键词： environmental barrier coating volcanic ash rare-earth disilicate corrosion

探索发展与减灾协调之路——从2006年达沃斯国际减灾会议看中国发展与减灾协调对策

在线全文

学校读者我要写书评

暂无评论

自然灾害学报 2006年第6期15卷 1-8页

作者：史培军李宁刘婧杨慧娟宋培国北京师范大学环境演变与自然灾害教育部重点实验室

介绍了于2006年8月28日至9月1日在瑞士达沃斯举行的国际减灾会议的主要内容。在阅读本次会议有关论文扩展摘要集内容,以及会议上散发的大量文件、研究报告的基础上,综述了当前国际减灾研究与实践工作中,学术界、政界与企业界等在探索协... 详细信息

介绍了于2006年8月28日至9月1日在瑞士达沃斯举行的国际减灾会议的主要内容。在阅读本次会议有关论文扩展摘要集内容,以及会议上散发的大量文件、研究报告的基础上,综述了当前国际减灾研究与实践工作中,学术界、政界与企业界等在探索协调发展与减灾进程中的主要进展和发展趋向。国际减灾界当前关注的主要领域为:建立灾害与风险科学,善待与重建生态系统,关注全球环境变化与灾害的密切关系,重视利用金融、保险和再保险手段转移风险,关注女性在灾害风险管理中的作用,关注恐怖主义对社会风险的强化作用,发展灾害风险管理的信息支撑平台,重视建设高风险地区综合减灾范式。在此基础上,针对中国可持续发展战略实施过程中存在的主要问题,提出中国协调发展与减灾对策为:建立国家协调发展与减轻灾害风险的管理体制与运行机制,加强控制综合灾害风险水平的生态系统等减灾基础设施建设,发挥女性在农村地区综合灾害风险管理中的作用,建立区域综合灾害风险管理与减灾范式和加强区域综合灾害风险防范关键技术的开发,促进灾害与风险学科体系的形成。

关键词：国际减灾会议达沃斯发展减灾综合灾害风险管理

Gamma Cascade Transition of 51V(nth, g )52V Reaction

在线全文

学校读者我要写书评

暂无评论

World Journal of Nuclear Science and Technology 2014年第1期4卷 40-45页

作者： Pham Dinh Khang nguyen Xuan Hai Ho Huu thang Vuong Huu Tan nguyen An Son nguyen Duc Hoa Nuclear Research Institute Dalat Vietnam Nuclear Training Center Hanoi Vietnam University of Dalat Dalat Vietnam Vietnam Agency for Radiation and Nuclear Safety Hanoi Vietnam

the thermal neutron capture gamma radiations for 51V(n, g)52V reaction have been studied at Dalat Nuclear Research Reactor (DNRR). the gamma two-step cascade transition was measured by event-event coincidence spectrometer. the added-neutron binding energy in 52V was measured as 7.31 MeV. energy and the intensity transition of cascades were consistent with prediction of single particle model. Furthermore, the spin and the parity of levels were confined.

关键词： Gamma Two-Step Cascade Neutron Capture Reaction Coincidence

the Combined effect of Plastic Particles Size and Concentration on Rotifers’ (Brachionus plicatilis) Performance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2022年第2期21卷 509-519页

作者： SUI Yanming WANG Senyang MOHSeN Mohamed ZHANG Longsheng SHeN Mengyan LIU Zhiquan nguyen Haidang ZHANG Shengmao LI Kaixing LV Linlan Dong Xuexing School of Marine and Biological engineering Yancheng Institute of TechnologyYancheng 224002China Department of Animal Production Faculty of AgricultureAl-Azhar UniversityNasr CityCairo 11884Egypt CAS Key Laboratory of Marine ecology and environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China School of Life Sciences East China Normal UniversityShanghai 200241China Research Institute for Aquaculture No.1 Dinh Bang-Tu Son-Bac Ninh 16352Vietnam east China Sea Fishery Research Institute Chinese Academy of Fishery SciencesShanghai 200090China

the presence of microplastics in aquatic ecosystems is of increasing global ***-sized plastics,in particular,can penetrate the cell membrane and cause biological *** study evaluated the combined impacts of several polystyrene mi-crospheres’sizes and nominal concentrations on the overall performance changes of Brachionus *** animals were exposed to three microplastic sizes(0.08,0.5 and 6μm)and five nominal concentrations(0,0.5,2,8,32μg mL−1)for 20 *** results showed that the toxicological effect of particle size on rotifers did not significantly depend on the nominal *** interaction between the nominal concentration and size occurred only for body length and lorica ***,high nominal concentrations of microplastics that were close to nanometer size significantly impaired the overall vitality of rotifers,embodied in shortage of body type,delay in the arrival of maturity,reduction in the cumulative number of neonates,and the advance of the death *** comparison,fair-sized size(0.5 and 6μm)displayed non-significant damage except for individual *** notably,the net reproductive yield was only a third of what it was in the original environment,implying that there was not much fertility ***,with the development of rotifers,the adverse effects of polystyrene microsphere drive had become more and more serious.

关键词： microplastic zooplankton environmental stress life-history parameters

经皮冠状动脉介入后阻塞性睡眠呼吸暂停与心血管事件的关系

在线全文

学校读者我要写书评

暂无评论

中华高血压杂志 2016年第5期24卷 499-499页

作者： Lee CH Sethi R Li R Ho HH Hein T Jim MH Loo G Koo CY Gao XF Chandra S Yang XX Furlan SF Ge Z Mundhekar A Zhang WW Ucha CH Kharwar RB Chan PF Chen SL Chan MY Richards A Tan HC ong th Roldan G Tai BC Drager LF Zhang JJ 刘莉叶鹏

目前关于阻塞性睡眠呼吸暂停（obstructive sleepapnea，OSA）对冠状动脉疾病患者的预后意义的大型队列研究数据匮乏。该研究假设OSA可预测行经皮冠状动脉介入治疗（percutaneous coronary ***）患者未来主要不良心脏和脑血管事件（majo... 详细信息

目前关于阻塞性睡眠呼吸暂停（obstructive sleepapnea，OSA）对冠状动脉疾病患者的预后意义的大型队列研究数据匮乏。该研究假设OSA可预测行经皮冠状动脉介入治疗（percutaneous coronary ***）患者未来主要不良心脏和脑血管事件（major adverse cardiac and cerebrovascularevents，MACCe）。方法：睡眠及支架研究是一项前瞻性、多中心注册研究，纳入2011年12月和2014年4月来自5个国家经PCI治疗成功的患者1748例。

关键词：经皮冠状动脉介入治疗阻塞性睡眠呼吸暂停心血管事件冠状动脉疾病脑血管事件队列研究患者 OSA

Optimal culture conditions for the generation of natural killer cell-induced dendritic cells for cancer immunotherapy

在线全文

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2012年第1期9卷 45-53页

作者： thanh-Nhan nguyen-Pham Deok-Hwan Yang Truc-Anh thi nguyen Mi-Seon Lim Cheol Yi Hong Mi-Hyun Kim Hyun Ju Lee Youn-Kyung Lee Duck Cho Soo-Young Bae Jae-Sook Ahn Yeo-Kyeoung Kim Ik-Joo Chung Hyeoung-Joon Kim Je-Jung Lee Research Center for Cancer Immunotherapy Chonnam National University Hwasun HospitalJeollanamdoKorea Department of Hematology-Oncology Chonnam National University Hwasun HospitalJeollanamdoKorea Vaxcell-Bio therapeutics JeollanamdoKorea the Brain Korea 21 Project Center for Biomedical Human Resources at Chonnam National UniversityGwangjuKorea

Dendritic cell(DC)-based vaccines continue to be considered an attractive tool for cancer *** require an additional signal from the environment or other immune cells to polarize the development of immune responses toward T helper 1(th1)or th2 *** play a role in natural killer(NK)cell activation,and NK cells are also able to activate and induce the maturation of *** investigated the types of NK cells that can induce the maturation and enhanced function of DCs and the conditions under which these interactions *** that were activated by resting NK cells in the presence of inflammatory cytokines exhibited increased expression of several costimulatory molecules and an enhanced ability to produce *** cell-stimulated DCs potently induced th1 polarization and exhibited the ability to generate tumor antigen-specific cytotoxic T lymphocyte *** data demonstrate that functional DCs can be generated by coculturing immature DCs with freshly isolated resting NK cells in the presence of Toll-like receptor agonists and proinflammatory cytokines and that the resulting DCs effectively present antigens to induce tumor-specific T-cell responses,which suggests that these cells may be useful for cancer immunotherapy.

关键词： cancer immunotherapy dendritic cells natural killer cells signal

2021亚太心脏病学会P2Y12受体拮抗剂应用于亚太特殊人群的共识

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中华心血管病杂志 2023年第1期51卷 19-31页

作者： Jack Wei Chieh Tan Derek P Chew Kin Lam Tsui Doreen Tan Dmitry Duplyakov Ayman Hammoudeh 张波李毅徐凯 Paul J ong DoniFirman Habib Gamra Wael Almahmeed Jamshed Dalal Lihua Tan Gabriel Steg Quang N nguyen Junya Ako Jassim Al Suwaidi Mark Chan Mohamed Sobhy Abdulla Shehab Wacin Buddhari 王祖禄 Alan Yean Yip Fong Bilgehan Karadag Byeong-Keuk Kim Usman Baber Chee Tang Chin 韩雅玲新加坡国立心脏中心新加坡盛港综合医院澳大利亚弗林德斯大学医学与公共卫生学院香港特别行政区东区尤德夫人那打素医院新加坡国立大学理学院药学系俄罗斯萨马拉地区心脏病医院约旦安曼Istishari医院心脏病科大连医科大学第一附属医院心内科大连116000 北部战区总医院心内科沈阳110840 新加坡伊丽莎白诺维娜医院新加坡陈笃生医院印度尼西亚Harapan Kita国家心血管中心、印度尼西亚大学医学院心脏病学和血管医学系突尼斯Fattouma Bourguiba大学医院/莫纳斯提尔大学心脏病科阿拉伯联合酋长国阿布扎比克利夫兰诊所印度孟买Kokilaben Dhirubhai Ambani医院心脏中心香港特别行政区广华医院法国巴黎比夏医院心脏病科越南河内医科大学心脏病科日本神奈川县相模原市北里大学医学院心血管内科卡塔尔多哈哈马德医疗公司成人心脏病科新加坡国立大学心脏中心埃及亚历山大大学医学院阿拉伯联合酋长国阿联酋大学医学与健康科学学院泰国曼谷朱拉隆功国王纪念医院马来西亚砂拉越哥打三马拉汉心脏中心土耳其伊斯坦布尔大学-Cerrahpasa医学院韩国首尔延世大学医学院Severance心血管医院心脏病科美国俄克拉荷马大学健康科学中心

高龄、糖尿病(DM)和慢性肾脏疾病(CKD)不仅会增加慢性冠状动脉综合征(CCS)患者缺血事件的风险,还会增加其接受抗血小板治疗期间的出血风险。此类特殊人群可能需要调整治疗方案,尤其是亚洲的特殊人群,往往表现出与西方人群不同的临床特... 详细信息

高龄、糖尿病(DM)和慢性肾脏疾病(CKD)不仅会增加慢性冠状动脉综合征(CCS)患者缺血事件的风险,还会增加其接受抗血小板治疗期间的出血风险。此类特殊人群可能需要调整治疗方案,尤其是亚洲的特殊人群,往往表现出与西方人群不同的临床特征。关于亚洲人群CCS高风险的分类和急性冠状动脉综合征(ACS)后使用新一代强效P2Y12受体抑制剂(如替格瑞洛和普拉格雷)的国际指南已相继发表。本共识总结了在特殊人群中使用强效P2Y12受体抑制剂的相关证据,提出了在冠状动脉疾病(CAD)特殊人群中应用标准疗程双联抗血小板治疗(DAPT)、短期DAPT和单一抗血小板治疗的推荐意见。本共识的特殊人群包括从ACS过渡至CCS,老年,或患有CKD、DM、多血管CAD和治疗期间发生出血并发症等特征的患者。

关键词：血小板聚集抑制剂亚洲心肌缺血共识双联抗血小板治疗

Type I and II interferons enhance dendritic cell maturation and migration capacity by regulating CD38 and CD74 that have synergistic effects with TLR agonists

在线全文

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2011年第4期8卷 341-347页

作者： thanh-Nhan nguyen-Pham Mi-Seon Lim Truc Anh thi nguyen Youn-Kyung Lee Chun-Ji Jin Hyun Ju Lee Cheol Yi Hong Jae-Sook Ahn Deok-Hwan Yang Yeo-Kyeoung Kim Ik-Joo Chung Byoung Chul Park Hyeoung-Joon Kim Je-Jung Lee Research Center for Cancer Immunotherapy Chonnam National University Hwasun HospitalJeollanamdoKorea Department of Hematology-Oncology Chonnam National UniversityGwangjuKorea the Brain Korea 21 Project Center for Biomedical Human Resources at Chonnam National UniversityGwangjuKorea Vaxcell-Bio therapeutics JeollanamdoKorea Korea Research Institute of Bioscience and Biotechnology(KRIBB) DaejeonKorea

the major limitation for the maturation of dendritic cells(DCs)using Toll-like receptor(TLR)agonists is their decreased ability to migrate into lymph nodes compared with conventional ***38 can be used as a multifunctional marker to modulate migration,survival and th1 responses of ***74 has been shown to negatively regulate DC *** goal of this study was to investigate the combinations of TLR agonists and interferons(IFNs)that most effectively regulate CD38 and CD74 expression on *** TLR agonist stimulation in combination with IFN-a and IFN-c was the best method for regulating CD38 and CD74 expression and inducing the highest secretion of *** in vitro migration assay showed that DCs treated with this combination had significantly enhanced migratory ability,similar to that observed in cells expressing CD38,CD74 and *** results of this study suggest that an alternative maturation protocol in which two TLR ligands are combined with type I and II IFNs generates potent DCs that have both a high migratory capacity and high IL-12p70 production.

关键词： CD38 CD74 dendritic cells interferon Toll-like receptor

4th National Anti-tuberculosis Drug Resistance Survey in Kenya

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Health Science 2017年第6期5卷 282-291页

作者： Joseph Sitienei Kamene Kimenye Josephine Wahogo Bernard Langat enos Masini Obadiah Njuguna Jane ong'ang'o Sophie Matu Jeremiah Okari Maurice Maina Margret Mburu Herman Weyenga Jane Mwangi Lucy Nganga Agnes Langat Abraham Katana Hillary Kipruto Joel Kangangi Division of Leprosy Tuberculosis and Lung Disease Department of Disease Prevention and Control Ministry of Health Nairobi 20781 Kenya Kenya Medical Research Institute [KeMRI] Centre for Respiratory Diseases Research Nairobi 20781 Kenya National TB Reference Laboratory Department of Disease Prevention and Control Ministry of Health Nairobi 20781 Kenya United States Agency for International Development [USAID] Department of Population and Health Kenya and East Africa Office Nairobi 20781 Kenya U.S. Centers for Disease Control and Prevention [CDC] Nairobi 20781 Kenya Worm Health Organization [WHO] Kenya Country Office Nairobi 20781 Kenya

Introduction： Recently rapid development of drug resistant TB, particularly MDR TB （Multi Drug Resistant TB） and XDRTB （extensively Drug-Resistant TB） possess a major threat to control of tuberculosis globally. Information on the extent of MDR-TB from Kenya is largely limited due to several factors. Monitoring of development of resistance is a vital tool in providing critical information for effective planning for TB control and in management of patients infected with TB. Methods： Cross-sectional with cluster design. Results： A total of 2,171 participants recruited into the study from 50 selected clusters. Prevalence of rifampicin resistance for new cases was 1.3% [95% CI, 0.8-2.0] and INH resistance was 5.5% [95% CI, 4.5-6.7]. MDR TB was found in 0.67% of new cases and 2.1% amongst previously treated TB cases. Discussion： Resistance to isoniazid in Kenya has been on the decline due to introduction of rifampicin in combined therapy. there was increase of MDR TB among new cases by 24% and decline in previously treated cases due to lethal impact of HIV. Conclusions： Although drug resistance TB is a growing problem in Kenya, resistance to isoniazid and rifampicin MDR TB is less than previously estimated. the country should continue to monitor drug resistance and ensure effective use of anti TB medicines.

关键词： Multi drug resistant TB Mycobacterium tuberculosis drug resistance Kenya.