检索结果-南通市图书馆

肝外恶性肿瘤病人mDCT检查时肝内小低密度灶:增强mRI进一步显示其特征的价值

在线全文

cnki会议

学校读者我要写书评

暂无评论

国际医学放射学杂志 2011年第1期34卷 97-98页

作者： S.E.Baek m.S.Park j.y.Choi y.E.Chung j.S.Lim 张秀玲 Department of Diagnostic Radiology Severance Hospital

目的回顾性分析常规mRI与钆对比动态增强成像对于肝内小低密度病灶的补充价值,这些病灶因太小而在mDCT上缺乏特征性。方法病人签署知情同意书。

关键词：肝脏转移 mRI 肝内小病灶 CT

Rewiring host–microbe interactions and barrier function during gastrointestinal inflammation

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Gastroenterology Report 2022年第1期10卷 3-17页

作者： Sune K.jensen Simone I.Pærregaar Emma P.Brandum Astrid S.jørgensen Gertrud m.Hjortø Benjamin A.H.jensen Department of Biomedical Sciences Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark

organismal survival depends on a well-balanced immune system and maintenance of host–microbe *** finetuned relationship between the gut microbiota and host immunity is constantly challenged by opportunistic bacteria testing the integrity of gastrointestinal(GI)barrier *** dysfunction reduces immunological tolerance towards otherwise innocuous microbes;it is a process that may instigate chronic ***,sustained inflammation further diminishes barrier function,enabling bacterial translocation to extra-intestinal *** translocated,these bacteria stimulate systemic inflammation,thereby compromising organ *** genetic risk alleles associate with barrier dysfunction,environmental stressors are key triggers of GI inflammation and associated breakdown in immune tolerance towards resident gut *** dietary components dictate substrate availability,they also orchestrate microbiota composition and function,including migratory and pro-inflammatory potential,thus holding the capacity to fuel both GI and extra-intestinal ***,Western diet consumption may weaken barrier defenses via curbed Paneth cell function and diminished host-defense peptide *** review focuses on intervenable niches of host–microbe interactions and mucosal immunity with the ambition to provide a framework of plausible strategies to improve barrier function and regain tolerance in the inflamed mucosa via nutritional intervention.

关键词： host-defense peptides mucosal barrier defects IBD nutritional immunology bacterial translocation

The role of sphingosine-1-phosphate in bone remodeling and osteoporosis

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Bone Research 2022年第2期10卷 265-273页

作者： justus m.Grewe Paul-Richard Knapstein Antonia Donat Shan jiang Daniel jSmit Weixin Xie johannes Keller Department of Trauma and orthopedic Surgery University Medical Center Hamburg-Eppendorf20246 HamburgGermany Clinic and Polyclinic for Vascular medicine University Heart Center Hamburg-Eppendorf20246 HamburgGermany Institute of Biochemistry and Signal Transduction University Medical Center Hamburg-Eppendorf20246 HamburgGermany

osteoporosis is a systemic bone disease that affects more than 200 million people worldwide and is caused by the disruption of the equilibrium between osteoclastic bone resorption and osteoblastic bone formation. Sphingosine-1-phosphate(S1 P) is a natural,bioactive sphingolipid that has been shown to play a major role in cardiovascular and immunological pathologies by regulating biological and cellular processes, including migration, differentiation, proliferation and survival. Recent studies also suggest a central role for S1 P in bone diseases, including osteoporosis;however, the effects of S1 P, particularly in bone metabolism, remain to be further elucidated. In this review, we summarize the available literature on the role of S1 P in bone metabolism with a focus on osteoporosis. on the cellular level, S1 P acts as an osteoclast-osteoblast coupling factor to promote osteoblast proliferation and bone formation. moreover, the recruitment of osteoclast precursors to resorption sites is regulated by the interplay of S1 P gradients and S1 P receptor expression. From a clinical perspective, increasing evidence suggests that systemically elevated S1 P blood levels may serve as an independent risk factor for osteoporosis-related fractures. Taken together, S1 P signaling is a potential therapeutic target and may serve as a novel biomarker in patients with systemic bone disease.

关键词： osteoporosis metabolism expression.

Roles of arabinogalactan proteins in cotyledon formation and cell wall deposition during embryo development of Arabidopsis

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Roles of arabinogalactan proteins in cotyledon formation and...

细胞—生命的基础——中国细胞生物学学会2013年全国学术大会·武汉

作者： Zhong j Ren yj yu m ma TF Zhang XL Zhao j College of Life Sciences Wuhan University

Arabinogalactan proteins(AGPs) are a class of highly glycosylated,widely distributed proteins in higher *** the previous study,we found that the green fluorescence from jIm13-labeled AGPs was mainly distributed in embryo proper and the basal part of suspensor but gradually disappeared after the torpedo-stage embryos in ***(P-D-Glc)3 yariv phenylglycoside(βGlcy),a

关键词： Arabidopsis thaliana Arabinogalactan proteins Cotyledon Cellulose Pectin Shoot apical meristem

Searching for Bacterial Biofilm in Recurrent Cholangitis in Primary Sclerosing Cholangitis:A Case Presentation and Introduction of an Unexplored Disease mechanism

在线全文

cnki会议

学校读者我要写书评

暂无评论

journal of Clinical and Translational Hepatology 2018年第1期6卷 114-118页

作者： Alyssa y. Choi Florencia jalikis maria Westerhoff Sarag Boukhar Elinor Pulcini Chris Damman Lei yu Department of Internal medicine University of WashingtonSeattleWashingtonUSA Department of Pathology University of WashingtonSeattleWashingtonUSA Department of Pathology University of IowaIowa CityIowaUSA Center for Biofilm Engineering Montana State UniversityBozemanMontanaUSA Division of Gastroenterology University of WashingtonSeattleWashingtonUSA

Inflammation and fibrosis of the bile ducts are the defining pathological characteristics of primary sclerosing cholangitis(PSC).A previously unexplored mechanism for recurrent cholangitis,one of PSC's most common presentations,is bacterial colonization of the biliary epithelium in the form of biofilm,which may confer resistance to antibiotics and host phagocytic *** aim of the current study was to assess whether bacteria could be seen on the liver explant and whether they organized in the form of *** explanted PSC liver from a 60-year-old male who suffered from recurrent cholangitis was formalin-fixed,paraffinembedded and Gram *** specimens were observed under light *** bacteria nor biofilm were *** did not detect bacteria or biofilm in the liver explant of a single PSC patient with recurrent cholangitis using standard light *** suspect this may be in part due to techniques related to tissue preservation and microscopy.

关键词： Primary sclerosing cholangitis Recurrent cholangitis Biofilm

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国近海养殖环境碳汇形成过程与机制

中国科学：地球科学 2017年第12期47卷 1414-1424页

作者：张永雨张继红梁彦韬李鸿妹李刚陈晓赵鹏蒋增杰邹定辉刘晓勇刘纪化中国科学院青岛生物能源与过程研究所青岛266101 青岛海洋科学与技术国家实验室微生物海洋学联合实验室青岛266237 中国水产科学院黄海水产研究所青岛266071 山东大学海洋研究院青岛266273 国家海洋信息中心天津300171 华南理工大学环境与能源学院广州510006 山东海之宝海洋科技有限公司威海264300

中国是世界上海水养殖规模最大的国家,通过开展近海养殖增加海洋碳汇(亦称蓝碳)是应对全球气候变化和促进低碳发展的一条新的科学途径.蓝碳是"蓝色粮仓"建设的重要内容之一,通过提高贝藻等的养殖产量,增加可移出的碳汇,是近海蓝碳开发... 详细信息

中国是世界上海水养殖规模最大的国家,通过开展近海养殖增加海洋碳汇(亦称蓝碳)是应对全球气候变化和促进低碳发展的一条新的科学途径.蓝碳是"蓝色粮仓"建设的重要内容之一,通过提高贝藻等的养殖产量,增加可移出的碳汇,是近海蓝碳开发的一部分.而微型生物蓝碳、溶解有机碳(主要指惰性溶解有机碳)、颗粒碳的沉积等都是养殖碳汇的重要组成部分,是以往被遗漏的碳汇部分.从不同角度全面揭示近海养殖环境的碳汇形成过程与机制,科学评估近海养殖碳汇功能,不仅可为渔业经济可持续发展和生态文明建设提供重要的理论与技术支撑,并可能在未来碳市场中创造新的经济价值.

关键词：贝藻养殖海洋碳汇微型生物惰性溶解有机碳碳沉积

Ultrafast martensitic Phase Transition Driven by Intense Terahertz Pulses

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Ultrafast Science 2023年第1期3卷 27-32页

作者： B.Q.Song X.yang C.Sundahi j-H.Kang m.mootz y.yao I.E.Perakis L.Luo C.B.Eom j.Wang Department of Physics and Astronomy lowa State UniversityAmesIA 50011USA Ames National Laboratory of U.S.DoE AmesIA 50011USA Department of materials Science and Engineering.University of Wisconsin-madison MadisonWI 53706USA Department of Physics University of Alabama at BirminghamBirminghamAL35294-1170USA

We report on an ultrafast nonequilibrium phase transition with a strikingly long-lived martensitic anomaly driven by above-threshold single-cycle terahertz pulses with a peak field of more than 1 mV/cm.A nonthermal,terahertz-induced depletion of low-frequency conductivity in Nb_(3)Sn indicates increased gap splitting of high-energy Г_(12) bands by removal of their degeneracies,which induces the martensitic phase above their equilibrium transition *** contrast,optical pumping leads to a Г_(12) gap thermal *** light-induced nonequilibrium martensitic phase exhibits a substantially enhanced critical temperature up to~100 K,i.e.,more than twice the equilibrium temperature,and can be stabilized beyond technologically relevant,nanosecond time *** with first-principle simulations,we identify a compelling terahertz tuning mechanism of structural order via Г_(12) phonons to achieve the ultrafast phase transition to a metastable electronic state out of equilibrium at high temperatures far exceeding those for equilibrium states.

关键词： martensitic equilibrium nonequilibrium

笼状多金属氧簇笼的构筑及其质子传导性能研究(英文)

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

笼状多金属氧簇笼的构筑及其质子传导性能研究(英文)

中国化学会第八届全国物理无机化学学术会议

作者： H.-y.Zang j.-X.Wang D.-m.Cheng m.-j.Wei K.Li y.-G.Li Department of Chemistry Northeast Normal University

The development of new proton-conducting materials with cost-effective, high proton conductivity and water stability is very important in fuel-cell ***, we resynthesized two inorganic open frameworks based on [mnVo]clusters and lanthanide ions( H[Ln(Ho)][mnVo]·9NmP·17Ho(Ln = Ce(1), and La(2);NmP = N-methyl-2-pyrrolidone) and explored their potential proton

关键词：

LITHIUm mEASUREmENTS By mAGNETIC RESoNANCE ImAGING AND PoRE SoLUTIoN EXPRESSIoN

在线全文

cnki会议

学校读者我要写书评

暂无评论

LITHIUM MEASUREMENTS BY MAGNETIC RESONANCE IMAGING AND PORE ...

第十二届国际混凝土碱集料反应会议

作者： j.j.young m.D.A.Thomas *** T.W.Bremner Department of Civil Engineering Department of Civil Engineering mRI Centre Department of PhysicsUniversity of New BrunswickPO Box 4400FrederictonNB E3B 5A3Canada Department of Civil Engineering

＜正＞ The potential of using magnetic resonance imaging （mRI） technique to measure lithium in cement and concrete systems was studied. By comparing the results obtained by mRI measurement and traditional pore solution expression, a linear relationship was established, which showed that the mRI measurements were systematically higher than that of pore solution expression by approximately 0.03 mol/L. The data from both measurements showed that, at 28 days, a significant quantity （i.e. more than 40%） of the lithium added to the mix water was bound by cement hydration products. The binding isotherms follow either a linear or a power-law relationship. mRI was also used to establish a lithium distribution profile in a mortar sample. In future work, the mRI technique will be employed to help elucidate the mechanism by which lithium salts suppress ASR-induced expansion.

关键词： Lithium mRI Pore solution expression Lithium binding isotherms