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Raman Spectroscopy Analysis of Wollastonite/Tricalcium Phosphate Glass-Ceramics after Implantation in Critical Bone Defect in Rats

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Materials Sciences and Applications 2022年第5期13卷 317-333页

作者： Mauricio Mitsuo Monção Isabela Cerqueira Barreto Fúlvio Borges Miguel Luiz Fernando Cappa De Oliveira raul Garcia Carrodeguas Roberto Paulo Correia De Araújo Department of Technology in Health and Biology Federal Institute of Education Science and Technology of Bahia Salvador Brazil Laboratory of Tissue Bioengineering and Biomaterials Federal University of Bahia Salvador Brazil Nucleus for Spectroscopy and Molecular Structure Federal University of Juiz de Fora Juiz de Fora Brazil Noricum SL San Sebastián de los Reyes Madrid Spain Institute of Health Sciences Federal University of Bahia Salvador Brazil

In this work wollastonite/tricalcium phosphate (W/TCP) glass-ceramics with three W/TCP weight ratios (20/80;60/40 and 80/20) were implanted in rat calvaria and the modifications taking place during implantation were studied by Raman spectroscopy. The experimental glass-ceramics were composed of different contents of βW, αW, βTCP, αTCP, and glassy phases. Materials were implanted for 7-, 15-, 45- and 120-day periods after which the implanted materials were recovered and analyzed by FT-Raman spectroscopy. The results suggested that the αW phase reabsorbs fast during implantation in the glass-ceramics 60/40 and 80/20, whereas βTCP and αTCP glass-ceramic are gradually attenuated and replaced by biological apatite-like bands. In the glass-ceramic 20/80, the bands related to the βTCP phase remained unvaried in all analyzed periods. New bands associated with the deposition of collagenous material appeared during implantation for all 60/40 and 80/20 glass-ceramics experimental groups, but important differences in intensities between both groups. The spectra corresponding to implants of 60/40 glass-ceramic at the 120-day period were very similar to those of the control group (normal cortical bone), with regards to Raman shifts and intensities, as well as in the FWHM value of the 962 cm-1 apatite band (ν1 PO4 in hydroxyapatite), evidencing that apatite deposited at the implant site has the same crystallinity than biological apatite in normal bone mineral. The glass-ceramic 20/80 behaved just as an osteoconductive filling material, while glass-ceramics 60/40 and 80/20 were able to induce deposition of organic matrix mineralized new tissue. The 60/40 glass-ceramic showed the best performance and the most similar Raman spectrum to normal cortical bone.

关键词： Raman Spectroscopy Glass-Ceramics Wollastonite Tricalcium Phosphate

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Removal of Fluoride from Water Using Mesoporous MCM-41: An Optimization Approach Using Response Surface Methodology (RSM)

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Advances in Nanoparticles 2021年第3期10卷 95-114页

作者： Bodhaditya Das Saumen Banerjee Prasanta K. raul Rashmi R. Devi Iohbor M. Umlong Anup K. Talukdar Sanjai K. Dwivedi Defence Research Laboratory Tezpur Assam India Defence Materials and Stores Research and Development Establishment Kanpur UP India Department of Chemistry Gauhati University Assam India

Fluoride above 1.5 mg·L-1 is injurious to health. Removal of fluoride from water using mesoporous MCM-41 as a strong adsorbent material has been attempted. Characterization using transmission electron microscopic study of calcined MCM-41 showed the regular hexagonal array of mesoporous channels with an average size of 20 nm and the surface area (BET study) of 1306.96 m2·g-1. The average pore size of the particles was found to be 14.21 nm. A study on the effect of contact time on the removal of fluoride revealed that more than 85% uptake of fluoride onto MCM-41 was achieved at a contact time of 120 min. From the Langmuir adsorption study, the maximum sorption capacity of fluoride was found to be 63.05 mg/g at 301 K. From the thermodynamic study, the +ΔHo value of 2.29 kJ·mol-1 indicated the endothermic nature of the removal process. Application of Response Surface Model suggested that 77.88%

关键词： MCM-41 Mesoporous Silica Adsorption Fluoride Response Surface Methodology (RSM)

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布宜诺斯艾利斯的绿色屋顶

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世界建筑导报 2010年第1期25卷 40-43页

作者： Hugo E Gilardi Juan Cristobal Rautenstrauch raul Halac

项目地点:阿根廷布宜诺斯艾利斯项目类型:城市干预设计开工日期:未定这是为一项针对公共政策而设计的概念性项目,旨在大规模地推动布宜诺斯艾利斯现有住宅屋顶花园的建设。该项目获2005年豪瑞可持续建筑大奖赛拉丁美洲区金奖。

关键词：布宜诺斯艾利斯阿根廷

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职业教育与技能需求的匹配机制——以江西省为例

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职业技术教育 2016年第31期37卷 33-38页

作者：黄彬云赖勤拉乌.拉莫斯江西财经大学工商管理学院西班牙巴塞罗那大学计量经济统计与西班牙经济系

职业教育如何适应技能需求是我国当前经济增长方式转变过程中的重要论题。利用公共就业服务机构的劳动力供求数据,估计匹配函数和贝弗里奇曲线,得到的结果是职业教育匹配函数的规模报酬递减且贝弗里奇曲线向上倾斜,反映江西省劳动力市... 详细信息

职业教育如何适应技能需求是我国当前经济增长方式转变过程中的重要论题。利用公共就业服务机构的劳动力供求数据,估计匹配函数和贝弗里奇曲线,得到的结果是职业教育匹配函数的规模报酬递减且贝弗里奇曲线向上倾斜,反映江西省劳动力市场匹配效率偏低,存在技能供给不足形成的结构性失业,造成职业教育滞后于经济发展,不能适应技能需求。为此,构建了基于市场制度的企业参与机制,以有效地预测技能需求,从而推动职业教育与技能需求的匹配。该机制以市场制度为基础,以行业技能发展中心为枢纽,以职业教育机构为核心,以劳动经济研究机构为支撑。

关键词：职业教育技能需求匹配机制市场制度企业参与江西省

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Assessment of the Integrity and Retention of Chromium (VI) in Portland Cement Pastes

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Advances in Chemical Engineering and Science 2021年第1期11卷 1-17页

作者： Ferreira raul Tadeu Lobato Fortaleza Dário Batista Amorim Kelly Aparecida da Encarnação Lira Fernanda Silva Silva Marizete Helena Pereira Wagner Batista Santos Institute of Exact Sciences and Earth Federal University of Mato Grosso Barra do Gar&#231as/MT Brazil

Chromium is a heavy metal used for various applications such as in the manufacture of stainless steels, in chemicals for wood treatment, in tanneries, and in the refractory industry. The main problem associated with the use of chromium in these activities is the considerable volume of contaminated effluent that requires treatment, mainly due to its high mobility and toxicity in its hexavalent form. Immobilization methods arise as an efficient solution for the treatment of these wastes through converting them into inert and stable materials. The present paper aims to investigate Portland cement II’s paste properties with potassium dichromate addition in order to verify the chromium immobilization process. Analyses of moisture content, water absorption, axial compressive strength, and solubilization were done in samples at 7 and 28 days with 0%;0.5%;1.05;1.5%;2.0% and 2.5% potassium dichromate addition. The results showed the influence of this salt in cement hydration reactions, damaging the mechanical behavior and the water absorption capability of the material produced. In the solubilization test, all compositions had >99% efficiency of chromium immobilization in both ages of hydration, thus demonstrating the capability of a cementitious matrix to stabilize this metal.

关键词： Wastes Solidification-Stabilization Chromium Solubilization

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Performing Reliable Early Leak Detection on Storage Tank Terminals:Retrofitting of Existing Facilities and New Buildings

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材料科学与工程（中英文B版） 2018年第5期8卷 188-194页

作者： raul Risi Oil&Gas Division Manager TTK S.A.S.75008 ParisFrance

Liquid leak detection may represent a challenge for Oil&Gas operators,as indicated by operational feed-back and independent *** the availability of many different leak detection technologies,some systems may either fail to detect spills or generate frequent false *** particular,possible soil contamination from pre-existing leaks and pollution carry-over by rain water is difficult to filter out by a leak sensing *** case of false alarms relates to punctual sensors installed upstream the drain valve within the storage tank bunds,monitoring possible presence of leaks in rain *** old soil contamination,other criteria should also be considered when selecting a spill detection technology,such as asset type to be monitored(storage tank,pipeline,…),system accuracy(minimum detectable quantity,ability to localize the leak),detection time,reliability over time,capital,installation and operating *** paper will include an evaluation of different external leak detection technologies with respect to the above-mentioned criteria,pointing out the capabilities and limitations of each *** will be placed on reliability of leak monitoring systems in challenging environments.A new generation of digital,reusable sensing cables and probes,as well as the impact of sensitivity for different applications,will be *** leak sensor installation environment(positioning,adoption of special precautions,…)may significantly affect the system performance,different above ground and underground configurations will be presented,both for new builds and existing facilities.

关键词： Liquid leak detection addressable system storage tank pipeline

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Structural based of human Sirt6 novel function on regulation of TNFα secretion

Structural based of human Sirt6 novel function on regulation...

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第四届中国结构生物学学术讨论会

作者： Yi Wang Hong Jiang Saba Khan Guillaume Charron raul Mostoslavsky Howard C.Hang Hening Lin Quan Hao Department of Physiology University of Hong Kong Department of Chemistry and Chemical Biology Cornell University The Laboratory of Chemical Biology and Microbial Pathogenesis The Rockefeller University The Massachusetts General Hospital Cancer Center Harvard Medical School

The Sir2 family of enzymes or sirtuins are known as nicotinamide adenine dinucleotide（NAD）-dependent deacetylases and have been implicated in the regulation of transcription, genome stability, metabolism, and lifespan. However, four of the seven mammalian sirtuins have very weak deacetylase activity in vitro. Here we show that human Sirt6 efficiently removes long chain fatty acyl groups. The crystal structure of Sirt6 reveals a large hydrophobic pocket that can accommodate long chain fatty acyl groups. We demonstrate further that Sirt6 promotes the secretion of TNFα by removing the fatty acyl modification on TNFα. Protein lysine fatty acylation has been known to occur in mammalian cells, but the function and regulatory mechanisms of this modification were unknown. Our data suggest that protein lysine fatty acylation is a novel mechanism that regulates protein secretion. The discovery of Sirt6 as an enzyme that controls protein lysine fatty acylation provides new opportunities to investigate the physiological function of the previously ignored protein post-translational modification.

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A Model of High-Speed Endovascular Sonothrombolysis with Vortex Ultrasound-Induced Shear Stress to Treat Cerebral Venous Sinus Thrombosis

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Research 2023年第1期2023卷 1-13页

作者： Bohua Zhang Huaiyu Wu Howuk Kim Phoebe J.Welch Ashley Cornett Greyson Stocker raul G.Nogueira Jinwook Kim Gabe Owens Paul A.Dayton Zhen Xu Chengzhi Shi Xiaoning Jiang Department of Mechanical&Aerospace Engineering North Carolina State UniversityRaleighNCUSA Department of Mechanical Engineering Inha University IncheonRepublic of Korea George W.Woodruff School of Mechanical Enginering Grgia lnstitute of TechnlogyAtlantaGAUSA Department of Biomedical Engineering University of Michigan Ann ArborMIUSA Department of Neurology Universityof Pittsburgh Medical CenterPttsburghPA USA Department of Biomedical Engineering University of North CarolinaChapel HillNCUSA Parker H.Petit Institute for Bioengineering and Bioscience Georgia Institute of TechnologyAtlantaGAUSA

This research aims to demonstrate a novel vortex ultrasound enabled endovascular thrombolysis method designed for treating cerebral venous sinus thrombosis(CVST).This is a topic of substantial importance since current treatment modalities for CVST still fail in as many as 20%to 40%of the cases,and the incidence of CvST has increased since the outbreak of the coronavirus disease 2019 *** with conventional anticoagulant or thrombolytic drugs,sonothrombolysis has the potential to remarkably shorten the required treatment time owing to the direct clot targeting with acoustic ***,previously reported strategies for sonothrombolysis have not demonstrated clinically meaningful outcomes(e.g.,recanalization within 30 min)in treating large,completely occluded veins or ***,we demonstrated a new vortex ultrasound technique for endovascular sonothrombolysis utilizing wavematter interaction-induced shear stress to enhance the lytic rate *** in vitro experiment showed that the lytic rate was increased by at least 64.3%compared with the nonvortex endovascular ultrasound treatment.A 3.1-g,7.5-cm-long,completely occluded in vitro 3-dimensional model of acute CVST was fully recanalized within 8 min with a record-high lytic rate of 237.5 mg/min for acute bovine clot ***,we confirmed that the vortex ultrasound causes no vessel wall damage over ex vivo canine *** vortex ultrasound thrombolysis technique potentially presents a new life-saving tool for severe CVST cases that cannot be efficaciously treated using existing therapies.

关键词： thrombolysis drugs vortex

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保护家庭无线网络的安全

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中国教育网络 2012年第3期 40-41页

作者： raul Siles 诸葛建伟(翻译) 李硕(翻译) 不详中国清华大学网络工程研究中心北京邮电大学

许多家庭wi—Fi无线网络的设置并不安全，很容易允许陌生者或者未授权用户加入你的家庭网络，或者匿名的蹭网。

关键词：家庭网络无线网络安全保护匿名

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Letter from Editor-in-Cheief

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Plastic and Aesthetic Research 2018年第5期5卷 F0002-F0002页

作者： raul Gonzalez-Garcia Department of Oral a nd Maxillofacial-Head and Neck Surgery University Hospital Infanta CristinaAvenida de Elvas s/n06080 BadajozSpain.

It is a great honor for me to be part of this scientific proj ect and now reality after several years of very hard and encouraging work, which is the Plastic and Aesthetic Research, an innovative journal focusing on plastic and aesthetic surgery, such as plastic and aesthetic materials, plastic surgery, oral and maxillofacial surgery, head and neck surgery, microsurgery, laser treatment. orthopedic surgery, ophthalmoplasty, dentistry, psychology, social ethics, other medical disciplines associated with the postoperative complications of plastic surgery. After over 228 published articles from 2014, the journal is gaining more and more dissemination among scientific forums and medical databases, so that the ultimate advances in plastic and aesthetic surgery are more prone to be at the disposal of clinicians and researchers, in a fast publication process from the development of knowledge, and in a high scientific reputable peer review system which ensures the reliability of the published material.

关键词： surgery Research medical databases

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