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structural effects induced by dialysis-based purification of carbon nanomaterials

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Nano materials science 2024年第4期6卷 475-483页

作者： A.d.Veloso A.m.Ferraria A.m.Botelho do Rego A.s.Viana A.J.s.Fernandes A.J.Fielding R.A.Videira m.C.Oliveira CQ-VR and Chemistry department University of Trás-os-Montes e Alto Douro BsIRG iBB-Institute for Bioengineering and BiosciencesDepartment of Chemical Engineeringand Associate Laboratory i4HB-Institute for Health and BioeconomyInstituto Superior TécnicoUniversidade de Lisboa Centro de Química Estrutural Institute of Molecular SciencesDepartamento de Química e BioquímicaFaculdade de CiênciasUniversidade de Lisboa I3N and physics department University of AveiroCampus de Santiago Faculty of science Pharmacy and Biomolecular SchoolLiverpool John Moores University REQUImTE/LAQV Laborat orio de FarmacognosiaDepartamento de QuímicaFaculdade de Farm aciaUniversidade do Porto

dialysis plays a crucial role in the purification of nanomaterials but its impact on the structural properties of carbon nanomaterials was never ***,a carbon-based nanomaterial generated electrochemically in potassium phosphate buffer,was characterized before and after dialysis against pure *** is shown that dialysis affects the size of the carbon domains,structural organization,surface functionalization,oxidation degree of carbon,and grade of ***,dialysis drives the nanomaterial organization from.d.screte roundish carbon domains,with sizes ranging from 70 to 160 nm,towards linear stacking structures of small nanoparticles （m）.In parallel,alcohol and ether （epoxide） surface groups evolve into more oxidized carbon groups （e.g.,ketone and ester groups）.Investigation of the as-prepared nanomaterial by electron paramagnetic resonance （EPR） revealed a resonance signal consistent with carbon-oxygen centred ***,this study brings to light the selective affinity of the carbon nanomaterial under study to capture Na+ions,a property greatly enhanced by the dialysis process,and its high ability to trap oxygen,particularly before *** findings open new perspectives for the application of carbon-based nanomaterials and raise awareness of the importance of structural changes that can occur during the purification of carbon-based nanomaterials.

关键词： Nanocarbon surface functionalization NmR XPs Hydrophilic carbon Paramagnetic

solid-liquid extraction for yttrium recovery using porous polymeric resin(XAd-7) functionalized with d_(2)EHPA

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Journal of Rare Earths 2024年第9期42卷 1764-1773,I0005页

作者： P.A.martínez-montoya R.G.sanchez-Alvarado d.Y.m.d.na-Velazquez m.L.Carrera-Jota P.Garnica-Chávez A.de J.morales-Ramirez Higher school of Chemical Engineering and Extractive Industries ESIQIEIPNDepartment of Metallurgical EngineeringUPALM S/NCol.LindavistaGustavo A.Madero Cd.de MéxicoC.P07738Mexico metropolitan Autonomous University Department of MaterialsBasic Sciences and EngineeringAv.San Pablo No.180Col.Reynosa TamaulipasCd.de MéxicoC.P02200Mexico Center for Research and Technological Innovation CIITECIPNCda.de CECATIs/nSanta CatarinaAzcapotzalcoC.P02250CDMXMexico

The recovery of yttrium is proposed by applying a solid-liquid extraction process using di-2-ethyl hexylphosphoric acid(d2EHPA) as extracting *** extracting agents were supported on a macro porous polymeric resin XAd-7(solid phase).Yttrium ions extraction and discharge tests were perform.d.firstly from a synthetic aqueous solution of 100 mg/L Y(liquid phase) at 25℃ with *** effects of ph of aqueous solutions bearing yttrium,volume fraction of extracting agents and the solid/liquid(s/L)ratio on the yttrium recovery were *** most favorable conditions for yttrium ions extraction are;20 vol% d_(2)EHPA functionalized resin,ph=1.5 and an s/L ratio of 10 mg/mL The discharge of yttrium ions was done under the same conditions of extraction stage,using a 2 mol/L [H_(2)sO_(4)] as stripping *** to 80% yttrium is extracted,while 75% yttrium is recovered in the striping *** all experiments,the reaction equilibrium is reached after 20 min,and the kinetics for the extraction stage was determined as a second-order ***,experiments were carried out to discharge the yttriumloaded resins,and it has been determined that the best ph value to strip the Y ions is *** tests of extraction and discharge for yttrium ions show that the functionalized resin can work at least five cycles without decreasing its ***,the proposed process was tested in a real solution with Y ions fro m a waste fluorescent la mp powder leached in H_(2)sO_(4),demonstrating the ability to effectively recover yttrium,separating it from various metals from the studied residue.

关键词： Yttrium recovery Rare earth solid-liquid extraction XAd-7 resin Fluorescent lamps recycling solid-liquid kinetics extraction

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design of seismic Isolated structures: From Theory to Practice

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China＇s Health Care Reform

1999年

作者： Farzad Naeim ph.d., s.E. James m. Kelly ph.d.

ISBN: (数字)9780470172742

ISBN: (纸本)9780471149217

Complete, practical coverage of the evaluation, analysis, and design and code requirements of seismic isolation systems. Based on the concept of reducing seismic demand rather than increasing the earthquake resistance capacity of structures, seismic isolation is a surprisingly simple approach to earthquake protection. However, proper application of this technology within complex seismic design code requirements is both complicated and difficult. design of seismic Isolated structures provides complete, up-to-date coverage of seismic isolation, complete with a systematic development of concepts in theory and practical application supplemented by numerical examples. This book helps design professionals navigate and understand the ideas and procedures involved in the analysis, design, and development of specifications for seismic isolated structures. It also provides a framework for satisfying code requirements while retaining the favorable cost-effective and damage control aspects of this new technology. An indispensable resource for practicing and aspiring engineers and architects, design of seismic Isolated structures includes: * Isolation system components. * Complete coverage of code provisions for seismic isolation. * mechanical characteristics and m.d.ling of isolators. * Buckling and stability of elastomeric isolators. * Examples of seismic isolation designs. * specifications for the design, manufacture, and testing of isolation devices.

关键词： Earthquake resistant design

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China International Business 2011年第2期 38-39页

作者： WEI ZHANG m.d. ph.d. Assistant Professor of management director Center of Health Care Policy and Management China Europe International Business School （CEIBS）

It＇s been nearly two years since the launch of China＇s three-year, RmB 850 billion ,（Usd I28.6 billion） health care reform,

关键词：改革医疗中国人民币美元

subband Adaptive Filtering: Theory and Implementation Har/Cdr

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Endoscopic ultrasound-guided portal pressure gradient identifies patients with previously undiagnosed clinically significant portal hypertension

2009年

作者： Kong‐Aik Lee B.Eng (1st Class Hons), ph.d. Woon‐seng Gan B.Eng (1st Class Hons), phd sen m. Kuo B.s., m.s., ph.d.

ISBN: (数字)9780470745977

ISBN: (纸本)9780470516942

subband adaptive filtering is rapidly becoming one of the most effective techniques for reducing computational complexity and improving the convergence rate of algorithms in adaptive signal processing applications. This book provides an introductory, yet extensive guide on the theory of various subband adaptive filtering techniques. For beginners, the authors discuss the basic principles that underlie the design and implementation of subband adaptive filters. For advanced readers, a comprehensive coverage of recent developments, such as multiband tap–weight adaptation, delayless architectures, and filter–bank design methods for reducing band–edge effects are included. several analysis techniques and complexity evaluation are also introduced in this book to provide better understanding of subband adaptive filtering. This book bridges the gaps between the mixed–domain natures of subband adaptive filtering techniques and provides enough depth to the material augmented by many mATLAB® functions and examples. Key Features: Acts as a timely introduction for researchers, graduate students and engineers who want to design and deploy subband adaptive filters in their research and applications. Bridges the gaps between two distinct domains: adaptive filter theory and multirate signal processing. Uses a practical approach through mATLAB®-based source programs on the accompanying Cd. Includes more than 100 m-files, allowing readers to m.d.fy the code for different algorithms and applications and to gain more insight into the theory and concepts of subband adaptive filters. subband Adaptive Filtering is aim.d.primarily at practicing engineers, as well as senior undergraduate and graduate students. It will also be of interest to researchers, technical managers, and computer scientists.

关键词： Adaptive filters.

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Portal Hypertension & Cirrhosis 2024年第2期3卷 67-74页

作者： Jerome C.Edelson scott F.d.Edelson John G.Quiles Cyrus V.Edelson Eric m.montminy Christian L.Horn John P.magulick don C.Rockey department of Gastroenterology and Hepatology Brooke Army Medical CenterFort Sam HoustonTexasUSA department of m.d.cine Uniformed Services University of the Health SciencesBethesdaMarylandUSA department of m.d.cine Brooke Army Medical CenterFort Sam HoustonTexasUSA John H.stroger Jr.Hospital of Cook County ChicagoIllinoisUSA digestive disease Research Center Medical University of South CarolinaCharlestonSouth CarolinaUSA

Aims:Portal hypertension(ph)is a complication of cirrhosis that leads to hepatic *** the portal pressure gradient(PPG)provides valuable information for disease assessment,staging,and *** this study,we aim.d.to report the utilization of endoscopic ultrasound(EUs)-guided PPG(EUs-PPG)measurements in a real-world ***:This retrospective analysis included patients at a tertiary care center who underwent EUs-PPG between February 2021 and may *** most common indication was to establish or exclude the diagnosis of cirrhosis,followed by an assessment of surgical risk in the setting of suspected *** demographic and clinical data were collected,and statistical analysis was perform.d.using the student's t ***:Eighteen patients underwent *** success was achieved in 17 of the 18 *** complications were *** mean scores of Child-Pugh,m.d.l for End-stage Liver disease-sodium,and Fibrosis-4 scores were 5.1±0.5,9.0±3.0,and 3.7±4.5,*** the 18 patients,two presented with esophageal varices and six with portal hypertensive *** mean PPG was 5.8±4.5 mmHg,and five patients exhibited clinically significant ph(Csph).Of the 18 patients,15 underwent concurrent EUs-liver biopsy,which was 100%successful and provided diagnostic histology for all *** PPG data led to changes in the clinical management of 17 ***:EUs-PPG is safe and technically *** Child-Pugh score did not correlate well with the presence of Csph;however,PPG measurements resulted in changes in the management of almost all *** studies correlating EUs-PPG with other assessments of liver diseases are required.

关键词： EUs portal hypertension portal pressure gradient

Fundamentals of digital Logic and microcomputer design, Fifth Edition 5th ed.

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TONGUEs OF TCm CONsTITUTIONAL TYPEs IN OTOLARYNGOLOGY OUTPATIENTs

2005年

作者： m. Rafiquzzaman ph.d

ISBN: (数字)9780471733522

ISBN: (纸本)9780471727842

Fundamentals of digital Logic and microcomputer design , has long been hailed for its clear and simple presentation of the principles and basic tools required to design typical digital systems such as microcomputers. In this Fifth Edition, the author focuses on computer design at three levels: the device level, the logic level, and the system level. Basic topics are covered, such as number systems and Boolean algebra, combinational and sequential logic design, as well as more advanced subjects such as assembly language programming and microprocessor-based system.d.sign. Numerous examples are provided throughout the text. Coverage includes: digital circuits at the gate and flip-flop levels Analysis and design of combinational and sequential circuits microcomputer organization, architecture, and programming concepts design of computer instruction sets, CPU, memory, and I/O system.d.sign features associated with popular microprocessors from Intel and motorola Future plans in microprocessor development An instructor's manual, available upon request Additionally, the accompanying Cd-ROm, contains step-by-step procedures for installing and using Altera Quartus II software, mAsm 6.11 (8086), and 68asmsim (68000), provides valuable simulation results via screen shots. Fundamentals of digital Logic and microcomputer design is an essential reference that will provide you with the fundamental tools you need to design typical digital systems.

关键词： Electronic digital computers

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Journal of Traditional Chinese m.d.cine 1987年第4期7卷 251-262页

作者：匡调元 InglisJ.miller Jr. ph.d. FrankB.Little Jr. m.d. Chengdu College of Traditional Chinese m.d.cine department of Anatomy Bowman Gray school of m.d.cine NC U.s.A. department of Anatomy Bowman Gray school of m.d.cine NC U.s.A. department of Anatomy Bowman Gray school of m.d.cine NC U.s.A. department of Otolaryngology Bowman Gray school of m.d.cine North Carolina Baptist Hospital NC U.s.A. department of Otolaryngology Bowman Gray school of m.d.cine North Carolina Baptist Hospital NC U.s.A. department of Otolaryngology Bowman Gray school of m.d.cine North Carolina Baptist Hospital NC U.s.A.

The appearance of the tongue has been a diagnos-tic feature in Traditional Chinese m.d.cine(TCm)for 2,000 *** contemporary TCm,observationof the tongue and other diagnostic criteria are usedto classify patients into 6 constitutional *** along with the specific complaints form thebasis of diagnosis and *** order to presentthe system and test its applicability to a Westernpatient population,we examined 141 outpatients inthe Otolaryngology(ENT)clinic and categorizeddiagnostic features of their *** patientis assigned a constitutional type as well as a moreconventional ENT *** of the tongueand behavioral patterns correspond to those observedin *** prevalence of ENT diagnoses is dis-tributed proportionally among TCm types,so thereis little overlap in the main diagnostic features ofthe two *** signs of the tongue are re-cognized in Western m.d.cine,but their occurrenceis not associated with a systemic view of the patient'shealth.

关键词： dRT TCm TONGUEs OF TCm CONsTITUTIONAL TYPEs IN OTOLARYNGOLOGY OUTPATIENTs sCT

Thermophysical Characterization of Local materials from a Locality in Chad for Use in Eco-Building

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Open Journal of Civil Engineering 2024年第3期14卷 486-497页

作者： Abderahman Adoum Oumar malloum soultan Abdallah dadi Togdjim jonas mahamat saleh Abdel-Khadir mahamoud Youssouf Khayal salif Gaye Laboratoire de Recherche en Energétique et matériaux (LREm) de l’INsTA Institut National Supérieur des Sciences et Techniques d’Abéché Abéché Chad Ecole doctorale science Technique et Environnement Université de N’Djamena N’Djamena Tchad Laboratoire CABET (Construction Alternative Basse Energie au Tchad) N’Djamena Chad Laboratoire de matériaux d’Énergétique d’Électricité et d’Économie (LM3E) Université Iba Der Thiam de Thiès Thiès Sénégal

With the aim of enhancing the value of local building materials, the subject of this paper is a thermophysical study of natural Chadian clay from the eastern region of Chad, “Abeche”. samples were taken from a brickwork in Abeche from a depth of 1 m, then using a clay brick-making press, 4 × 5 × 8 cm 3 clay test tubes were m.d. with 2%, 4%, 6% and 8% cow dung, and a 100% clay sample was used as a control. These samples underwent thermophysical characterization using the hot-wire method with a hot-plane option, yielding results that could improve thermophysical performance. The thermal conductivity of the test sample is in the order of 0.715 to 0.420 W/m. K, at 8% for cow dung, so the addition of cow dung as a percentage in the clay matrix enabled us to obtain various satisfactory thermal parameters.

关键词： soils Characterization Thermophysical Local Building