检索结果-南通市图书馆

Theoretical prediction,synthesis,and crystal structure determination of new MAX phase compound V2SnC

Journal of Advanced Ceramics 2020年第4期9卷 481-492页

作者： Qiang Xu Yanchun Zhou Haiming Zhang Anna Jiang Quanzheng Tao Jun Lu Johanna rosén Yunhui Niu Salvatore Grasso Chunfeng Hu Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu610031China Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing100076China School of Mechanical Electronic and Control EngineeringBeijing Jiaotong UniversityBeijing100044China Thin Film Physics Division Department of PhysicsChemistryand Biology(IFM)Linköping UniversityLinköpingSE-58183Sweden State Key Laboratory of environment-friendly energy Materials Southwest University of Science and TechnologyMianyang621010China

Guided by the theoretical prediction,a new MAX phase V2SnC was synthesized experimentally for the first time by reaction of V,Sn,and C mixtures at 1000°*** chemical composition and crystal structure of this new compound were identified by the cross-check combination of first-principles calculations,X-ray diffraction(XRD),energy dispersive X-ray spectroscopy(eDS),and high resolution scanning transmission electron microscopy(HR-STeM).The stacking sequence of V2C and Sn layers results in a crystal structure of space group P63/*** a-and c-lattice parameters,which were determined by the Rietveld analysis of powder XRD pattern,are 0.2981(0)nm and 1.3470(6)nm,*** atomic positions are V at 4f(1/3,2/3,0.0776(5)),Sn at 2d(2/3,1/3,1/4),and C at 2a(0,0,0).A new set of XRD data of V2SnC was also *** calculations suggest that this new compound is stable with negative formation energy and formation enthalpy,satisfied Born-Huang criteria of mechanical stability,and positive phonon branches over the Brillouin *** also has low shear deformation resistance c44(second-order elastic constant,cij)and shear modulus(G),positive Cauchy pressure,and low Pugh’s ratio(G/B=0.500egarded as a quasi-ductile MAX *** mechanism underpinning the quasi-ductility is associated with the presence of a metallic bond.

关键词： V2SnC new MAX phase compound crystal structure first-principles calculations

来源：

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

核桃膳食对老年人诊室和24h动态血压的影响

引用

中华高血压杂志 2019年第5期27卷 499-499页

作者： Domènech M Serra-Mir M Roth I Freitas-Simoes T VallsPedret C Cofán M López A Sala-Vila A Calvo C Rajaram S SabatéJ ros e 刘青叶鹏不详

食用坚果可降低血液中的胆固醇,并与心血管病的减少相关,但对血压的影响则不一致。研究者评估了在参加核桃和健康老龄化研究的独立生活的老年人中,2年核桃膳食与对照膳食对诊室血压和24h动态血压的影响,这是一项评估占能量摄入≈15%的... 详细信息

食用坚果可降低血液中的胆固醇,并与心血管病的减少相关,但对血压的影响则不一致。研究者评估了在参加核桃和健康老龄化研究的独立生活的老年人中,2年核桃膳食与对照膳食对诊室血压和24h动态血压的影响,这是一项评估占能量摄入≈15%的核桃对年龄相关疾病影响的随机试验。在预先设定的分析中,研究者招募了305名参与者,其中236名(75%)完成了研究(65%为女性,年龄为69岁,60%为轻度高血压)。参与者对核桃膳食耐受性良好,依从率>98%。平均基线诊室血压为128/79mmHg(lmmHg=0.133kPa)。

关键词： 24h动态血压老年人核桃膳食诊室健康老龄化轻度高血压心血管病

来源：

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

地中海膳食可降低24h动态血压、空腹血糖及血脂:1年随机临床试验

引用

中华高血压杂志 2014年第7期22卷 699-699页

作者： Doménech M Roman P Lapetra J García de la Corte FJ Sala-Vila A de la Torre R Corella D Salas-Salvadó J Ruiz-Gutiérrez V Lamuela-Raventós RM Toledo e estruch R Coca A ros e 赵狄

地中海膳食（MedDiets）添加橄榄油或坚果，较对照组低脂膳食可减少心血管事件，特别是脑卒中，但其心血管保护机制尚不清楚。研究人员进行随机、平行设计、对照试验研究，评估长达1年添加橄榄油或坚果的地中海膳食对24h动态血压、血糖... 详细信息

地中海膳食（MedDiets）添加橄榄油或坚果，较对照组低脂膳食可减少心血管事件，特别是脑卒中，但其心血管保护机制尚不清楚。研究人员进行随机、平行设计、对照试验研究，评估长达1年添加橄榄油或坚果的地中海膳食对24h动态血压、血糖和血脂的影响。膳食时间随意，

关键词： 24h动态血压随机临床试验低脂膳食空腹血糖地中海血脂心血管事件保护机制

来源：

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

Imperfect mimicry of host begging calls by a brood parasitic cuckoo:a cue for nestling rejection by hosts?

引用

Current Zoology 2021年第6期67卷 665-674页

作者： Hee-Jin NOH ros GLOAG Ana V.LeITAO Naomi e.LANGMORe Research School of Biology Australian National UniversityCanberra ACT 0200Australia School of Life and environmental Sciences University of SydneySydneyNSW 2006Australia School of Biosciences University of MelbourneParkville VIC 3010Australia

Coevolutionary interactions between avian brood parasites and their hosts often lead to the evolution of discrimination and rejection of parasite eggs or chicks by hosts based on visual cues,and the evolution of visual mimicry of host eggs or chicks by brood *** may also base rejection of brood parasite nestlings on vocal cues,which would in turn select for mimicry of host begging calls in brood parasite *** cuckoos that exploit multiple hosts with different begging calls,call structure may be plastic,allowing nestlings to modify their calls to match those of their various hosts,or fixed,in which case we would predict either imperfect mimicry or divergence of the species into host-specific *** our study of the little bronze-cuckoo(LBC)Chalcites minutillus and its primary host,the large-billed gerygone Gerygone magnirostris,we tested whether:(1)hosts use nestling vocalizations as a cue to discriminate cuckoo chicks;(2)cuckoo nestlings mimic the host begging calls throughout the nestling period;and(3)the cuckoo begging calls are plastic,thereby facilitating mimicry of the calls of different *** found that the begging calls of LBCs are most similar to their gerygone hosts shortly after hatching(when rejection by hosts typically occurs)but become less similar as cuckoo chicks get *** call structure may be used as a cue for rejection by hosts,and these results are consistent with gerygone defenses selecting for age-specific vocal mimicry in cuckoo *** found no evidence that LBC begging calls were plastic.

关键词： begging call bronze-cuckoo brood parasitism coevolution gerygone

来源：

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

地中海膳食干预研究中来自胆碱通路的血浆代谢物与心血管病风险的关系

引用

中华高血压杂志 2017年第12期25卷 1108-1108页

作者：黄洁叶鹏 Guasch-Ferré M Hu FB Ruiz-Canela M Bulló M Toledo e Wang DD Corella D Gómez-Gracia e Fiol M estruch R Lapetra J Fitó M Arós F Serra-Majem L ros e Dennis C Liang L Clish CB Martínez-González MA Salas-Salvadó J

血浆甜菜碱水平以及胆碱代谢水平与主要心血管病终点之间的联系仍不清楚。研究者评估了胆碱通路的代谢物与偶发心血管病风险以及地中海膳食干预的潜在调节效应之间的相关性。

关键词：心血管病膳食干预代谢物地中海胆碱风险血浆通路

来源：

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

富含核桃或橄榄油的高脂饮食对餐后内皮功能的急性效应

引用

世界核心医学期刊文摘（心脏病学分册） 2007年第4期3卷 42-42页

作者： Cortés B. Nùez I. Cofán M. e.ros 郭俊 Secci'o d'ecografia Centre de Diagnòstic per l'ImatgeBarcelonaSpain Dr.

目的:本研究旨在探讨在脂肪饮食中添加核桃或橄榄油是否会对餐后血管活性、脂蛋白、氧化标记物、内皮激活标记物及血浆非对称性二甲基精氨酸(ADMA)产生不同影响。背景:与地中海饮食相比。

关键词：高脂饮食饱和脂肪酸血管舒张健康受试者高胆固醇血症血流介导炎性细胞因子黏附分子非依赖性

来源：

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

Managing type 2 diabetes:targeting a microbial enzyme as a novel treatment option

引用

Signal Transduction and Targeted Therapy 2024年第1期9卷 3-5页

作者： Anikó Keller-Pintér Tamás Korcsmáros Tibor Vellai Department of Biochemistry Albert Szent-Györgyi Medical SchoolUniversity of SzegedSzeged6720Hungary Department of Metabolism Digestion and ReproductionImperial College LondonLondonW120NNUK Quadram Institute Bioscience Norwich Research ParkNorwichNR47UQUK Department of Genetics Eötvös Loránd University(ELTE)Budapest1117Hungary Hungarian Research Network HUN-ReN-eLTe Genetics Research Group Budapest1117Hungary

In a recent Science article,Wang and colleagues showed that the dipeptidyl peptidase 4(DPP4)enzyme produced by the gut microbiota can interfere with the effect of host glucagon-like peptide-1(GLP-1)involved in stimulating insulin secretion,and the specific inhibitor of microbial DPP4(mDPP4),combined with clinical inhibitors of host DPP4 isoenzymes,further promotes blood glucose homeostasis.1 These results point out why certain patients respond inadequately to an antidiabetic medication.

关键词： homeostasis stimulating clinical

来源：

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

Downregulation of the Basic Peroxidase Isoenzyme from Zinnia elegans by Gibberellic Acid

引用

Journal of Integrative Plant Biology 2010年第2期52卷 244-251页

作者： María Josefa López Núez-Flores Jorge Gutirrez Laura V.Gómez-ros esther Novo Uzal Mariana Sottomayor Alfonso ros Barceló Department of Plant Biology University of MurciaE-30100MurciaSpain Department of Plant Biology University of La CoruaE-15071La CorunaSpain IBMC University of Porto4150 PortoPortugal

Hypocotyl formation during the epigeal germination of seedlings is under strict hormonal regulation. In a 3 d old Zinnia elegans seedling system, gibberellic acid （GA3） exerts an opposite effect to that exerted by light on hypocotyl photomorphogenesis because GAz promotes an etiolated-like growth with an inhibition of radial （secondary） growth. For this reason, the effect of GA3 on the basic peroxidase isoenzyme from Z. elegans （ZePrx）, an enzyme involved in hypocotyl lignin biosynthesis, was studied. The results showed that GA3 reduces ZePrx activity, similarly to the way in which it reduces seedling secondary growth. This hormonal response is supported by the analysis of the ZePrx promoter, which contains four types of GA3-responsive ***： the W Box/O2S; the Pyr Box; the GARe; and the Amy Box. Taken together, these results suggest that ZePrx is directly regulated by GA3, with this effect matching the inhibitory effect of GA on the hypocotyl secondary growth.

关键词： GA Downregulation of the Basic Peroxidase Isoenzyme from Zinnia elegans by Gibberellic Acid cis Figure

来源：

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

The versatility of mesenchymal stem cells:From regenerative medicine to COVID,what is next?

引用

BIOCeLL 2022年第4期46卷 913-922页

作者： THAÍS CASAGRANDe PAIM MÁRCIA rosÂNGeLA WINK Laboratório de Biologia Celular Universidade Federal de Ciências da Saúde de Porto Alegre(UFCSPA)Porto Alegre90050-170Brazil

Mesenchymal stem cells(MSCs)play key roles in regenerative medicine by promoting tissue *** can be isolated from different adult tissues and they are able to differentiate into several *** to their antiinflammatory,angiogenic and immune-modulatory properties,MSCs are suitable for tissue engineering applications and,when associated with biomaterials,their benefits can be ***,recently,MSCs have been studied for new clinical applications,such as in the treatment of patients with *** regenerative potential has been attributed to their secretome,which comprises extracellular matrix,soluble proteins and several elements,including the release of extracellular *** though,in order to explore all their therapeutic potential,it is still necessary to advance in the investigation of their basic cell biology characteristics.

关键词： Mesenchymal stem cells Regenerative medicine Secretome Biomaterials extracellular vesicles

来源：

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

Lower bounds on the minimum distance in Hermitian one-point differential codes

引用

Science China Mathematics 2013年第7期56卷 1449-1455页

作者： KORCHMros Gábor NAGY Gábor Pétery Dipartimento di Matematica e Informatica Università della Basilicata Bolyai Institute University of Szeged

Korchmaros and Nagy [Hermitian codes from higher degree places. J Pure Appl Algebra, doi： 10. 1016/***.2013.04.002, 2013] computed the Weierstrass gap sequence G（P） of the Hermitian function field Fq2 （H） at any place P of degree 3, and obtained an explicit formula of the Matthews-Michel lower bound on the minimum distance in the associated differential Hermitian code CΩ（D, mP） where the divisor D is, as usual, the sum of all but one 1-degree Fq2-rational places of Fq2 （H） and m is a positive integer. For plenty of values of m depending on q, this provided improvements on the designed minimum distance of CΩ（D, mP）. Further improvements from G（P） were obtained by Korchmaros and Nagy relying on algebraic geometry. Here slightly weaker improvements are obtained from G（P） with the usual function-field method depending on linear series, Riemann-Roch theorem and Weierstrass semigroups. We also survey the known results on this subject.

关键词： AG code Weierstrass gap Hermitian curve

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：