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Synthesis of Co-Cr-Mo Fluorapatite Nano-Composite Coatings by Pulsed Laser Deposition for Dental Applications

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Materials Sciences and Applications 2017年第2期8卷 135-152页

作者： Osama Khfagi Ntevheleni Thovhogi Dhiro Gihwala Malik Maaza Johan André Mars Cape Peninsula University of Technology CPUT Bellville South Africa UNESCO-UNISA African Chair in Nanosciences/Nanotechnology College of Graduate Studies University of South Africa Pretoria South Africa Nanosciences African Network (NANOAFNET) Materials Research Department iThemba LABS-National Research Foundation (NRF) Somerset West South Africa Higher Institute for Medical Professions Ajdabiya Libya

Aim: The study was to fabricate FA nanopowder/Co-Cr-Mo dental alloy nanocomposite using pulsed laser deposition (PLD), and to evaluate bioactivity properties on simulated body fluid. Methods: In this work, the FA nanopowder was prepared by mixing calcium hydroxide (Ca(OH)2), phosphorouspent oxide (P2O5) and calcium fluoride (CaF2) in a planetary high energy ball mill using zirconium vial. Fluorapatite (FA) nanopowder was processed in the form of pellet for pulsed laser deposition process. The Co-Cr-Mo alloy was coated with FA nanopowder which was approximately 35 - 65 nm at various laser energy, pressure and time. The X-ray diffraction (XRD) was used to analyze phase, crystallinity and size distribution of Co-Cr-Mo/FA nanocomposite. The surface analysis was by scanning electron microscopy (SEM), Atomic Force microscopy (AFM) and Energy dispersive spectroscopy (EDS). Results: From the results obtained, It was shown that FA nanopowder deposited on Co-Cr-Mo alloy was stable during 14 days of incubation on simulated body fluid. It was also observed that the FA nanopowder coated on the surface of the alloy was still intact after the deposition process, which indicated the bioactivity and biocompatibility of the material. Conclusions: The fabrication of FA nanocomposite based dental alloys (Co-Cr-Mo) using PLD was done successfully. This was confirmed by various characterization techniques, which included XRD, AFM, SEM and EDS.

关键词： Biocompatibility Cobalt-Chromium-Molybdenum Alloys Dental Alloys Fluorapatite Pulsed Laser Deposition (PLD) Simulated Body Fluid (SBF)

DIELECTRIC RELAXATION IN RELAXOR FERROELECTRICS

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Journal of Advanced Dielectrics 2012年第2期2卷 10-33页

作者： ALEXEI A.BOKOV ZUO-GUANG YE Department of Chemistry and 4D labs Simon Fraser University 8888 University Drive BurnabyBritish ColumbiaV5A 1S6Canada Electronic Materials Research Lab.Key Lab.of the Ministry of Education and International Center for Dielectric Research Xi'an Jiaotong University Xi'an 710049P.R.China

In this review the dielectric properties of relaxor ferroelectrics are discussed and compared withthe properties of normal dielectrics and ferroelectrics. We try to draw a general picture ofdielectric relaxation starting from a textbook review of the underlying concepts and pay attentionto common behavior of relaxors rather than to the features observed in specific materials. We hopethat this general approach is beneficial to those physicists, chemists, material scientists and deviceengineers who deal with relaxors. Based on the analysis of dielectric properties, a comprehensivedefinition of relaxors is proposed: relaxors are defined as ferroelectrics in which the maximum inthe temperature dependence of static susceptibility occurs within the temperature range ofdielectric relaxation, but does not coincide with the temperature of singularity of relaxation timeor soft mode frequency.

关键词： Relaxor ferroelectrics dielectric spectroscopy stretched exponential relaxation Vogel-Fulcher law

Long-term changes in mandibular bone microchemical quality after radiation therapy and underlying systemic malignancy:A pilot study

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Journal of Innovative Optical Health Sciences 2021年第6期4卷 90-101页

作者： A.Palander H.Dekker M.Hyvärinen L.Rieppo I.Lyijynen E.A.J.M.Schulten C.M.Ten Bruggenkate A.Koistinen A.Kullaa M.J.Turunen Institute of Dentistry University of Eastern Finland P.O.Box 162770211 KuopioFinland Department of Oral and Maxillofacial Surgery/Oral Pathology Amsterdam University Medical Centers and Academic Centre for Dentistry Amsterdam(ACTA)Vrije Universiteit Amsterdam De Boelelaan 11171081 HV AmsterdamThe Netherlands Research Unit of Medical Imaging Physics and Technology University of Oulu P.O.Box 5000 FI-90014 University of OuluFinland SIB labs University of Eastern Finland P.O.Box 162770211 KuopioFinland Educational Dental Clinic Kuopio University Hospital P.O.Box 162770211 KuopioFinland Department of Applied Physics University of Eastern Finland P.O.Box 162770211 KuopioFinland

Radiation therapy(RT)is a treatment option for head and neck cancer(HNC),but 2%of RT patients may experience damage to the jawbone,resulting in osteoradionecrosis(ORN).The ORN can manifest years after RT *** in the local microchemical bone quality prior to the clinical manifestation of ORN could play a key role in ORN *** bone quality can be analyzed using Fourier transform infrared spectroscopy(FTIR),that is applied to examine the effects of cancer,chemotherapy,and RT on the quality of human man-dibular *** mandibular bone samples were harvested from dental implant beds of 23 individuals,i.e.,patients with surgically and radiotherapeutically treated HNC(RT-HNC,n=7),surgically and radiochemotherapeutically treated HNC(CH-RT-HNC,n=3),only surgically treated HNC(SRG-HNC,n=4),and healthy controls(n=9).Infrared spectra were acquired from two representative regions of interest in cortical mandibular *** parameters,i.e.,mineral-to-matrix ratio(MM),carbonate-to-matrix ratio(CM),carbonate-to-phosphate ratio(CP),collagen maturity(cross-linking),crystallinity,acid phosphate substitu-tion(APS),and advanced glycation end products(AGEs),were analyzed for each *** I region of the CH-RT-HNC group differed from the control group in cluster analysis(p=0.02).Apart from a minor variation trend in collagen maturity(p=0.07),there were no other signif-icant differences between the ***,the effect of radiochemotherapy on mandibular bone composition should be further *** future trials,this study design is potential when the effects of the cancer burden and different HNC treatment modalities on jawbone composition are studied,in order to reveal ORN pathogenesis.

关键词： Mandibular bone radiation therapy Fourier transform infrared spectroscopy

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如何才能让数据分析真正优化一线销售业务？

变频器世界 2016年第11期 42-43页

作者： Nick Harrison Deborah O'Neill 奥纬咨询伦敦办公室奥纬咨询数字技术实验室(OW labs)伦敦办公室

近几年,销售领域掀起了广泛使用客户细分、客户行为跟踪等数据分析工具的热潮。然而,这些工具给销售成果带来的实质影响却收效甚微。究其原因我们发现,这些做法都忽视了一个关键因素：前线销售人员每天都在制定并执行尽可能最优化的营... 详细信息

近几年,销售领域掀起了广泛使用客户细分、客户行为跟踪等数据分析工具的热潮。然而,这些工具给销售成果带来的实质影响却收效甚微。究其原因我们发现,这些做法都忽视了一个关键因素：前线销售人员每天都在制定并执行尽可能最优化的营销策略,但是他们自身的需求却常常被忽略。

关键词：数据分析客户细分客户行为关键绩效指标实质影响客户至上历史数据产品名单理财顾问大型体育赛事

改良型与传统型免疫亲和柱净化-荧光光度法检测黄曲霉毒素的比较研究

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检验检疫科学 2009年第1期19卷 35-38页

作者：裴道国李学元张喆刘冰李晓静 Donna Houchins 李学云临沂出入境检验检疫局山东276034 Romer labs Inc.-1301 Stylemaster Driveunionmo63084

以高效液相色谱法测定食品中黄曲霉毒素作为确证方法,采用改良型免疫亲和柱净化-荧光光度检测技术检测花生及花生制品中的黄曲霉毒素,并与传统型免疫亲和柱净化-荧光光度法进行比较。结果表明:改良型免疫亲和柱净化-荧光光度检测技术具... 详细信息

以高效液相色谱法测定食品中黄曲霉毒素作为确证方法,采用改良型免疫亲和柱净化-荧光光度检测技术检测花生及花生制品中的黄曲霉毒素,并与传统型免疫亲和柱净化-荧光光度法进行比较。结果表明:改良型免疫亲和柱净化-荧光光度检测技术具有更好的准确性(检测两个阳性质控样品的标准偏差分别为0.15和1.28)和精密度(相对标准偏差分别为6.65%和8.97%);在与HPLC方法进行比较时,具有良好的一致性;检测两个加标空白花生样品的回收率分别为102.20%和101.75%。另外,与传统型免疫亲和柱净化-荧光光度法比较,改良型免疫亲和柱净化-荧光光度检测技术操作更为简便,检测时间由传统的25min缩短至10min,大大提高了检测效率。

关键词：比较黄曲霉毒素免疫亲和柱净化荧光光度法

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区块链跨链技术的发展与应用

数字技术与应用 2023年第1期41卷 16-18页

作者：李步天 TX labs

我国区块链技术经历了十几年的深入开发,已经建立起具备各种特性、广泛应用于不同工作环境的区块链体系。但由于国际间区块链体系的不兼容性以及链与链之间的高度异构性,造成了区块链之间的数据价值传递、信息传输等方面的科技障碍。而... 详细信息

我国区块链技术经历了十几年的深入开发,已经建立起具备各种特性、广泛应用于不同工作环境的区块链体系。但由于国际间区块链体系的不兼容性以及链与链之间的高度异构性,造成了区块链之间的数据价值传递、信息传输等方面的科技障碍。而国际区块链的跨链发展,也正是促进了区块链技术互连与贯通、提高了区块链技术互操作度和扩展能力的关键措施。

关键词：区块链技术不兼容性扩展能力数据价值信息传输异构性互操作关键措施

维普期刊数据库博看期刊

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时钟芯片在5G中的重要作用

电子产品世界 2020年第6期27卷 9-9页

作者： James Wilson Silicon labs

1从时钟角度看5G的特点为了在全球范围内提供5G网络连接和覆盖,服务提供商们正在部署更多的无线设备,从大容量的宏基站到专注于扩展网络覆盖范围的小基站和毫米波解决方案。与4G网络将射频和基带处理放在一起不同,5G将这些资源分布在整... 详细信息

1从时钟角度看5G的特点为了在全球范围内提供5G网络连接和覆盖,服务提供商们正在部署更多的无线设备,从大容量的宏基站到专注于扩展网络覆盖范围的小基站和毫米波解决方案。与4G网络将射频和基带处理放在一起不同,5G将这些资源分布在整个网络中,因此需要更大容量、更低延迟的前传和回传解决方案。

关键词：网络覆盖范围 4G网络基带处理时钟芯片无线设备小基站毫米波低延迟

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即插即用型模块简化Wi-Fi连接

今日电子 2016年第4期 72-72页

全集成Wizard Gecko WGM110是一歉即插即用型wiFi模块解决方案，针对物联网（IoT）应用，可满足该应用领域中对于卓越射频性能、小尺寸、便捷应用开发和快速上市时间等重要需求。该方案包括了实现可靠IoT Wi-Fi连接所需的所有必要元素... 详细信息

全集成Wizard Gecko WGM110是一歉即插即用型wiFi模块解决方案，针对物联网（IoT）应用，可满足该应用领域中对于卓越射频性能、小尺寸、便捷应用开发和快速上市时间等重要需求。该方案包括了实现可靠IoT Wi-Fi连接所需的所有必要元素：高性能2．4GHz 802．11b／g／n无线电、内置天线、全球认证、节能型EFM32 Gecko微控制器（MCU）、嵌入式Wi-Fi协议栈和多种互联网协议（包括带有TLS安全的TCP和UDP）。

关键词： Wi-Fi连接即插即用模块 802.11b/g Wizard 射频性能互联网协议 wiFi

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无线传感网将驱动物联网发展

电子产品世界 2012年第6期19卷 28-28页

作者： Mark Downing Silicon labs

结合无数具有IP功能的装置、RFID标签、无线传感网络、机器对机器（M2M）通信、iPhone手机应用程序、空白电视频段及云端运算，便能够具体实现物联网（IoT,Internet of Things）。

关键词：无线传感网络物联网 Internet 驱动 RFID标签手机应用程序 iPhone IP功能