检索结果-南通市图书馆

HVOF-sprayed HAp/S53p4 BG composite coatings on an AZ31 alloy for potential applications in temporary implants

Journal of Magnesium and Alloys 2024年第1期12卷 345-360页

作者： Carlos A.poblano-Salas John Henao Astrid l.Giraldo-Betancur paola Fore.o-Sossa Diego German Espinosa-Arbelaez Jorge A.González-Sánchez l.is r.dzib-pére. Susana T.Estrada-Moo Idelfonso E.pech-pech CIATEQ A.C. Av.Manantiales 23-AParque Industrial Bernardo QuintanaEl MarquésQuerétaro 76246Mexico CONAHCYT-CIATEQ A.C. Av.Manantiales 23-AParque Industrial Bernardo QuintanaEl MarquésQuerétaro 76246Mexico CONAHCYT-Cinvestav Libramiento Norponiente#2000.Fraccionamiento Real de JuriquillaQuerétaro 76230Mexico Universidad Tecnológica de Querétaro Av.Pie de la Cuesta N°2501Querétaro 76148Mexico CIDESI Av.Playa Pie de la Cuesta No 702Col.San PabloQuerétaro 76125Mexico Center for Corrosion re.earch Autonomous University of CampecheAv.Héroe de Nacozari No.480P.C.24070San Francisco de CampecheCam.Mexico

Bioactive thermal spray coatings produced via high-velocity oxygen fuel spray(HVOF)from hydroxyapatite(HAp)and bioactive glasses(BG)have the potential to be employed on temporary implants due to the ability of both HAp and BG to dissolve and promote osseointegration,considering that both phases have differe.t re.ction and dissolution rates under in-vitro *** the pre.ent work,75%***-25%wt.S53p4 bioactive glass powders were.HVOF-sprayed to obtain HAp/S53p4 BG composite coatings on a biore.orbable AZ31 *** study is focused on exploring the effect of the stand-off distance and fuel/oxygen ratio variation as HVOF parameters to obtain stable structural coatings and to establish their effect on the phases and microstructure.produced in those *** characterization techniques,such as scanning electron microscopy,X-ray diffraction,and Fourier transform infrare. spectroscopy,were.employed to characterize re.evant structural and microstructural properties of the composite *** re.ults showed that thermal gradients during coating deposition must be managed to avoid delamination due to the high temperature.achieved(max 550℃)and the differe.ces in coefficients of thermal *** was also found that both spraying distance and oxygen/fuel ratio allowed to keep the hydroxyapatite as the main phase in the *** addition,in-vitro electrochemical studies were.performed on the obtained HAp/S53p4 BG composite coatings and compare. against the uncoated AZ31 *** re.ults showed a significant decre.se in hydrogen evolution(at least 98%)when the bioactive coating was applied on the Mg alloy during evaluation in simulated body fluid(SBF).

关键词： Coatings Composites Thermal spray Temporary implants Hydrogen evolution

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

Effect of electromagnetic interaction on microstructure.and corrosion re.istance of 7075 aluminium alloy during modified indire.t electric arc welding process

引用

Transactions of Nonferrous Metals Society of China 2019年第3期29卷 473-484页

作者： J. S. re.NA-MONTOYA M. A. GArCIA-re.TErIA V. l. CrUZ-HErNANDEZ F. F. CUrIEl-lOpEZ l. r. dzib-pEre. l. A. FAlCON-FrANCO Faculty of Metallurgy Autonomous University of CoahuilaCarretera 57 Km. 5 CP 25720 Monclova Coahuila México Instituto de Investigación en Metalurgia y Materiales Universidad Michoacana de San Nicolás de Hidalgo A. P. 888 CP 58030 Morelia Michoacán México Centre.for Corrosion re.earch Autonomous University of CampecheAv. Agustín Melgar s/n Col. Buenavista CP 24039 Campeche Cam México

The effects of applying an electromagnetic interaction of low intensity (EMIlI) on the microstructure.and corrosion re.istance of 7075-T651 Al alloy plates (13 mm in thickness) during modified indire.t electric arc (MIEA) welding were.investigated. The welding process was conducted in a single pass with a heat input of ~1.5 kJ/mm. The microstructural observations of the welds were.corre.ated with the effect of EMIlI on the local mechanical properties and the corrosion re.istance in natural seawater by means of microhardness measure.ents and electrochemical impedance spectroscopy, re.pectively. Microstructural characterization of the welds re.ealed a grain re.inement in the weld metal due to the electromagnetic stirring induced by EMIlI of 3 mT during welding. In addition, observations in the scanning electron microscope showed that the pre.ipitation of Cu-rich phases and segre.ation of eutectics were.re.uced in the heat affected zone (HAZ) also as an effect of EMIlI. The high corrosion dissolution of the 7075-T651 welds in natural seawater and the extent of overaging in the HAZ were.re.uced when welding with EMIlI of 3 mT. Thus, EMIlI along with the MIEA technique may lead to welded joints with better microstructural characteristics, improved mechanical properties in the HAZ and re.uced electrochemical activity.

关键词： 7075-T651 Al alloy modified indire.t arc welding microstructural characterization corrosion re.istance electromagnetic interaction

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

CDS:A Fold-change Based Statistical Test for Concomitant Identification of Distinctness and Similarity in Gene Expre.sion Analysis

引用

Genomics,proteomics & Bioinformatics 2012年第3期10卷 127-135页

作者： Nicolas Tchitchek José Felipe Golib dzib Brice Targat Sebastian Noth Arndt Benecke Annick lesne Institut des Hautes Etudes Scientifiques Bures-sur-Yvette 91440France Centre.National de la re.herche Scientifique USR3078Bures-sur-Yvette 91440France laboratoire.de physique Théorique de la Matière.Condensée CNRS UMR7600Université Pierre et Marie Curie-Paris 6Paris 75005France

The problem of identifying differe.tial activity such as in gene expre.sion is a major defeat in biostatistics and *** important,however much less fre.uently studied,is the question of similar activity from one biological condition to *** foldchange,or ratio,is usually considere. a re.evant criterion for stating differe.ce and similarity between ***,no statistical method for concomitant evaluation of similarity and distinctness curre.tly exists for biological *** microarray,digital pCr(dpCr),and Next-Generation Sequencing(NGS) technologies fre.uently provide a means of coefficient of variation estimation for individual *** fold-change,and by making the assumption that measure.ents are.normally distributed with known variances,we designed a novel statistical test that allows us to detect concomitantly,thus using the same formalism,differe.tially and similarly expre.sed genes(http://***).Given two sets of gene measure.ents in differe.t biological conditions,the probabilities of making type I and type II errors in stating that a gene is differe.tially or similarly expre.sed from one condition to the other can be ***,a confidence interval for the fold-change can be ***,we demonstrate that the assumption of normality can be re.axed to consider arbitrary distributions *** Concomitant evaluation of Distinctness and Similarity(CDS) statistical test corre.tly estimates similarities and differe.ces between measure.ents of gene *** implementation,being time and memory efficient,allows the use of the CDS test in high-throughput data analysis such as microarray,dpCr,and NGS ***,the CDS test can be applied to the comparison of single measure.ents(N:1) provided the variance(or coefficient of variation) of the signals is known,making CDS a valuable tool also in biomedical analysis where.typically a single measure.ent per

关键词： Statistical test Fold-change Distinctness Similarity Gene expre.sion Single measure.ent patient study

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

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

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

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：