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The Emergence of Compositional Complexity and Anisotropy in Metal-Organic Frameworks

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Chemical Research in Chinese Universities 2021年第1期37卷 187-188页

作者： Nathaniel l.ROSI Department of Chemistry University of PittsburghPittsburghPA15260USA

The vast majority of reported MOFs are composed of two building blocks:one metal ion and one organic *** such MOFs,the metal-linker motifs repeat periodically throughout the crystal such that composition and structure... 详细信息

关键词： directions Complexity crystal

Metabolic reprogramming of glial cells as a new target for central nervous system axon regeneration

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Neural Regeneration Research 2022年第5期17卷 997-998页

作者： Erin l.Walden Shuxin li Shriners Hospitals Pediatric Research Center Department of Neural SciencesLewis Katz School of Medicine at Temple UniversityPhiladelphiaPAUSA

After central nervous system(CNS)injury,severed axons fail to regenerate and their disconnections to the original targets result in permanent functional deficits in patients(Mahar and Cavalli,2018).Both the diminished intrinsic regenerative capacity of mature neurons and the inhibitory CNS milieu contribute to the regenerative failure following CNS injury.

关键词： programming system permanent

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城镇

Plastic deformation of a Zr-based bulk metallic glass fabricated by selective laser melting

丛书名：美国当代畅销恐怖小说

2003年

作者：（美）本特利·利特（bentley little）叶特灵译

为了远离嘈杂的都市，格雷戈里带领全家搬回到少年时居住过的地方，但他们没有想到，死亡阴影开始笼罩小镇。吃人的澡堂、袭击牧师的圣经、令人毛骨悚然的杀戮，这一切灾难就在小镇人无准备的情况下降临了。

ISBN: (数字)7806890041

ISBN: (纸本)7806890041

关键词：文学美洲文学

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Journal of Materials Science & Technology 2021年第1期60卷 139-146页

作者： l.Deng K.Kosiba R.limbach l.Wondraczek U.Kühn S.pa.ly IFW Dresden Institute for Complex MaterialsHelmholtzstraße 20D-01069DresdenGermany Otto Schott Institute of Materials Research University of JenaFraunhoferstraße 6D-07743JenaGermany University of Applied Sciences Aschaffenburg Würzburger Straße 45D-63743AschaffenburgGermany

Fully amorphous Zr_(52.5)Cu_(17.9)Ni_(14.6)Al_(10)Ti_(5) bulk metallic glass(BMG) samples with a relative density exceeding 98% were fabricated via selective laser melting(SlM).High fracture stresses of around1700 Mpa and a reproducible plastic strain of about 0.5% were obtained for cylindrical SlM *** analysis of the observed serrations during compressive loading implies that the shear-band dynamics in the additively manufactured samples distinctly differ from those of the as-cast *** phenomenon appears to originate from the presence of uniformly dispersed spherical pores as well as from the more pronounced heterogeneity of the glass itself as revealed by instrumented *** these heterogeneities,the shear bands are straight and form in the plane of maximum shear *** manufacturing,hence,might not only allow for producing large BMG samples with complex geometries but also for manipulating their deformation behaviour through tailoring porosity and structural heterogeneity.

关键词： Powder bed fusion Selective laser melting Bulk metallic glass Serrated flow Heterogeneity

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博尼塔山庄

心肌梗塞细胞l型钙通道、钙运作(Ca^(2+)handling)及钠/钙交换功能研究

丛书名：本特利·利特恐怖小说系列

2003年

作者：（美）本特利·利特（bentley little）叶特灵译

恐怖小说作家做梦也没有想到，他和年轻、漂亮的妻子购买的郊外高尚小别野，竟会成为他们开始新生活的温柔陷阱。在这风景优美的地方，蔓延着一种地狱般的恐怖氛围，他们的经历比作家本人创作的恐怖小说还要令人透不过气来。

ISBN: (数字)780689005X

ISBN: (纸本)780689005X

关键词：长篇小说美国现代

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中国循环杂志 1999年第A09期14卷 24-26页

作者：浦介麟 Boydenpa 中国医学科学院中国协和医科大学心血管病研究所阜外心血管病医院临床电生理研究室北京市100037 美国纽约哥伦比亚大学药理系

目的：研究心肌梗塞细胞钙通道、钙运作及钠／钙交换功能变化。方法：运用膜片钳全细胞记录法测细胞膜钙电流，荧光技术测细胞内钙浓度。结果：心肌梗塞细胞钙离子密度明显下降（正常细胞：９－８ ±１－４ｐＡ／ｐＦ，心肌梗塞细胞... 详细信息

目的：研究心肌梗塞细胞钙通道、钙运作及钠／钙交换功能变化。方法：运用膜片钳全细胞记录法测细胞膜钙电流，荧光技术测细胞内钙浓度。结果：心肌梗塞细胞钙离子密度明显下降（正常细胞：９－８ ±１－４ｐＡ／ｐＦ，心肌梗塞细胞：３－７ ±０－６ｐＡ／ｐＦ，Ｐ＜０．０１），肌浆网钙诱发钙释放功能下降，钙回落缓慢而钠／钙交换功能无变化。结论：钙通道及钙运作功能异常可能与心肌梗塞后心力衰竭。

关键词：心肌梗塞钙通道钙运作钠/钙交换

Exercise for stroke prevention

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Stroke & Vascular Neurology 2018年第2期3卷 59-68页

作者： Peter l Prior Neville Suskin lawson Health Research Institution LondonOntarioCanada St.Josephs Health Care Cardiac Rehabilitation and Secondary Prevention Program LondonOntarioCanada Department of Medicine(Cardiology) Schulich School of Medicine&DentistryWestern UniversityLondonOntarioCanada

We review evidence concerning exercise for stroke *** biological reasons suggest that exercise would be important in preventing *** definitive randomised controlled trials evaluating the impact of physical activity(pa)and exercise on preventing stroke and mortality are lacking,observational studies,small randomised controlled trials and meta-analyses have provided evidence that pa and exercise favourably modify stroke risk factors,including hypertension,dyslipidaemia,diabetes,sedentary lifestyle,obesity,excessive alcohol consumption and tobacco *** is,therefore,important to understand the factors associated with poststroke pa/exercise and cardiorespiratory *** associated factors include self-efficacy,social support and quality of patients’relationships with health *** associated factors include logistical barriers,medical comorbidities,stroke-related deficits,negative exercise beliefs,fear of falling,poststroke fatigue,arthropathy/pain and *** research is needed to specify efficacious behavioural approaches to increase poststroke *** techniques probably include physician endorsement of exercise programmesto patients,enhancement of patient-professional relationships,providing patients an exercise rationale,motivational interviewing,collaborative goal-setting with patients,addressing logistical concerns,social support in programsmes,structured exercise programming,individualised behavioural instruction,behavioural diary recording,reviewing behavioural consequences of exercise efforts,reinforcing successful exercise *** programming without counselling may increase short-term activity;simple advice or information-giving is probably *** patients or those with cognitive impairment may need increased structure,with emphasis on behaviour per se,versus self-regulation *** support the latest American Heart Association/American Stroke Associati

关键词： prevention behaviour programming

On local Singularities in Ideal Potential Flows with Free Surface

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Chinese Annals of Mathematics,Series B 2019年第6期40卷 925-948页

作者： Jian-Guo lIU Robert l.PEGO Department of Physics and Department of Mathematics Duke UniversityDurhamNC 27708USA Department of Mathematical Sciences and Center for Nonlinear Analysis Carnegie Mellon UniversityPittsburghPennsylvaniaPA 12513USA

Despite important advances in the mathematical analysis of the Euler equations for water waves,especially over the last two decades,it is not yet known whether local singularities can develop from smooth data in well-posed initial value *** ideal free-surface flow with zero surface tension and gravity,the authors review existing works that describe"splash singularities",singular hyperbolic solutions related to jet formation and"flip-through",and a recent construction of a singular free surface by Zubarev and Karabut that however involves unbounded negative *** authors illustrate some of these phenomena with numerical computations of 2D flow based upon a conformal mapping *** tests with a different kind of initial data suggest the possibility that corner singularities may form in an unstable way from specially prepared initial data.

关键词： Incompressible flow Water wave equations Splash singularity Flipthrough Dirichlet hyperbolas Conformal mapping

lu–Hf constraints on pre-,syn,and post-collision associations of the Gurupi Belt,Brazil:Insights on the Rhyacian crustal evolution

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Geoscience Frontiers 2022年第5期13卷 336-349页

作者： Evandro l.Klein Joseneusa B.Rodrigues Geological Survey of Brazil SBNQuadra 02Bloco HEd.Central Brasília1andarAsa NorteBrasília-DF CEP:70040-904Brazil GPGE–Grupo de Pesquisa em Geologia Econômica(Economic Geology Research Group) PPGG–Programa de Pós-Graduação em Geologia e GeoquímicaUniversidade Federal do ParáBelém-PABrazil

The Gurupi Belt(together with the São luís cratonic fragment),in north-northeastern Brazil,has been described in previous studies that used extensive field geology,structural analysis,airborne geophysics,zircon U–Pb dating,and whole-rock Sm–Nd isotope and geochemical data as a polyphase orogenic belt,with the Rhyacian being the main period of crust *** was related to a 2240 Ma to 2140 Ma accretionary processes that produced juvenile crust,which has subsequently been reworked during a collisional event at 2100±20 Ma,with little evidence of Archean *** this study,we use lu–Hf isotopic data in zircon from granitoids(including gneiss)of variable magmatic series,and amphibolite to improve the knowledge of this scenario,and investigate additional evidence of recycling of Archean ***-collisional high Ba-Sr and ferroan granitoids and amphibolite formed in island arc(2180–2145 Ma),show only zircons with suprachondriticεHf values(ca.+1 to+8)indicating the large predominance of juvenile *** 10%of the data show slightly negativeεHf values(0 to-4),which have been observed in granodiorite-gneiss formed in continental arc(2170–2140 Ma),and in strongly peraluminous collisional granites(2125–2070 Ma),indicating the rework of older paleoproterozoic to Archean components(Hf_(TDM)=2.11–3.69 Ga).A two-component mixing model using both Hf and published Nd isotope data are in line with this interpretation and indicate more than 90%of juvenile material,and less influence of Archean *** with other Rhyacian terranes that are interpreted to have been close to Gurupi in a pre-Columbia configuration(ca.2.0 Ga),our results differ from those of SEGuiana Shield,which show strong influence of Archean protoliths,and are very similar to those of the central-eastern portion of the Baoulé-Mossi Domain of the West African Craton,which has also been formed largely by juvenile magmas in an accretionary-collisional orogen.

关键词： paleoproterozoic Accretion Collision Isotope geology lu–Hf isotopes Rhyacian