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Combined influence of Ce(Ⅲ)and iodide ions for corrosion protection of AA 2024-T3 in acidic to neutral chloride-rich environments:Electrochemical and surface characterization studies

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Journal of Rare Earths 2023年第2期41卷 309-320页

作者： Mohammed A.El-Hashemy Anthony E.Hughes Thomas Gengenbach a.matthew glenn Ivan S.Cole Chemistry Department College of ScienceJouf UniversityP.O.Box 2014SakakaAljoufSaudi Arabia Air Pollution Research Department Environmental and Climate Change Research InstituteNational Research CentreDokkiGiza12622Egypt CSIRO Mineral Resources ClaytonVic3168Australia CSIRO Manufacturing ClaytonVic3168Australia School of Engineering RMIT UniversityCarltonVic3053Australia

It has been reported that trivalent cerium salts are effective inhibitors for corrosion of AA2024-T3 in neutral to alkaline co rrosive enviro nments,but poor in acidic *** this study,work was done for extending corrosion resistance provided by Ce(NO_(3))_(3)to acidic pHs as low as 2.5 through the addition of iodide *** this end,potentiodynamic polarization was used to ascertain the optimum Ce(Ⅲ)concentration for the inhibition of AA2024-T3 corrosion in 3.5%NaCl *** optimum concentration is found to be in a range between 0.1 and 0.3 mmol/L Ce(Ⅲ).This optimum concentration also gives a maximum width of the passive region under the pitting potential(Epit).Based on this optimization,further work was performed as a function of pH without and in the presence of 0.01 mol/L KI at five pH values(2.5,4,5,7,and 8).Without iodide the best inhibition provided by the Ce(Ⅲ)cation is at pH=7 but active corrosion is observed at pH=2.5 with an estimated inhibitor efficiency(-37.6%).The addition of iodide ions(I^(-))reverses the poor corrosion resistance whereby the inhibitor efficiency becomes 47.7%.Moreover,at pH=4 the efficiency is also increased from 54.0%to 81.0%with iodide addition providing a significant improvement over Ce(Ⅲ)cations alone under acidic *** is a synergistic effect between I-anion and Ce(Ⅲ)cation,which is determined to be 2.4 and 2.1 at pH=2.5and 4.0,*** pH=5 and 7 there is virtually no change in inhibition but at pH=8 the inhibition falls away due to a considerable amount of cerium precipitating out of solution as cerium *** protective film formed on sites in the aluminium alloy surface at different pH values was examined by both scanning electron microscopy with energy dispersive X-ray analysis and X-ray photoelectron spectroscopy to determine the role of these ions as a function of pH in surface *** is proposed that at pH=2.5 protection is provided by a bilayer adsorption of iodide with"cap

关键词： Aluminium alloy Cerium(Ⅲ)salt Potassium iodide Corrosion inhibitor XPS Rare earths

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Shock effects on the upper limit of the collision weld process window

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Advances in Manufacturing 2024年第2期12卷 365-378页

作者： Blake Barnett Anupam Vivek glenn Daehn Department of Materials Science and Engineering The Ohio State UniversityColumbusOH43210USA Army Research Directorate Army Research LaboratoryDEVCOMAberdeen Proving GroundHarfordMD21005USA

The maximum flyer impact velocity based on a dynamic solidification cracking mechanism is proposed to describe the upper limit of collision welding process ***,the upper limit of the weld window is governed by the evolution of dynamic stresses and temperatures at the weld *** formulations for the upper limit of the collision weld window assume that both the flyer and target are made of the same material and approximate stress propagation velocities using the acoustic velocity or the shear wave velocity of the weld ***,collision welding fundamentally depends on the impacts that generate shockwaves in weld members,which can dominate the stress propagation velocities in thin weld ***,this study proposes an alternative weld window upper limit that approximates stress propagation using shock velocities calculated from modified 1-D Rankine-Hugoniot *** shock upper limit is validated against the experimental and simulation data in the collision welding literature,and offers a design tool to rapidly predict more accurate optimal collision weld process limits for similar and dissimilar weld couples compared to existing models without the cost or complexity of high-fidelity simulations.

关键词： Collision welding Solid-state welding Shock impact Weld process modelling Explosive bonding Laser impulse welding(LIW)

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Advances in teleophthalmology and artificial intelligence for diabetic retinopathy screening:a narrative review

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Annals of Eye Science 2024年第2期9卷 24-37页

作者： Tanvi Chokshi Maria Jessica Cruz Jonathon Ross glenn Yiu Tschannen Eye Institute Department of OphthalmologyUniversity of CaliforniaDavis HealthSacramentoCAUSA Department of Research College of MedicineCalifornia Northstate UniversityElk GroveCAUSA

Background and Objective:Advances in teleophthalmology and artificial intelligence(AI)for diabetic retinal screening is of growing public health ***,only 30–40%of patients with diabetes adhere to recommended diabetes screening *** enhance early detection and reduce vision threatening complications,there has been a growing number of teleophthalmology programs and novel AI algorithms with the aim to improve eye care *** purpose of this review is to assess current literature on teleophthalmology and AI for use in diabetic retinopathy(DR)screening,and to discuss advances and barriers to these innovative ***:Literature review involving teleophthalmology and AI for DR screening,with focus on the past *** Content and Findings:Teleophthalmology has demonstrated the ability to increase DR screening rates,enable earlier eye care access,and reduce healthcare *** AI-based DR screening programs appear accurate and effective,but detection of other ocular pathologies is still under development and not yet approved in the United ***,technological,financial,and legal barriers limit widespread adoption and long-term sustainability of teleophthalmology ***:The use of teleophthalmology and AI algorithms expands eye care access and helps prevent vision loss from DR and potentially other sight threatening *** in the process utilized for arriving at a particular diagnosis or decision to refer,often referred to as the“black box”,remains a multifaceted issue within the field of telemedicine for developing trust and improving patient-centered outcomes.

关键词： Teleophthalmology artificial intelligence(AI) diabetic retinopathy(DR) screening public health

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Antisense oligonucleotides provide optimism to the therapeutic landscape for tauopathies

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Neural Regeneration Research 2025年第3期20卷 803-804页

作者： glenn A.Harris Lauren R.Hirschfeld Rainwater Charitable Foundation Fort WorthTXUSA

Tauopathies are a group of neurodegenerative diseases characterized by abnormal metabolism of the misfolded tau protein. Tau is encoded by the microtubule-associated protein tau gene(MAPT) and can be classified as either 3-repeat(3R) or 4-repeat(4R) based on the number of repeat domains from alternative splicing of exon 10 of the MAPT gene.

关键词： tau metabolism diseases

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用微机电系统制造更好的手表

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科技纵览 2024年第2期 10-11页

作者： glenn Zorpette 不详

新型手表电机技术试图超越智能手表。半个多世纪以来,一直是计时市场支柱的指针式石英手表终于要进行高技术改造了?法国贝桑松的初创公司SilMach正在大力推进这一进程。该公司表示,他们使用硅微机电系统(MEMS)生产了一种用于指针式手表... 详细信息

新型手表电机技术试图超越智能手表。半个多世纪以来,一直是计时市场支柱的指针式石英手表终于要进行高技术改造了?法国贝桑松的初创公司SilMach正在大力推进这一进程。该公司表示,他们使用硅微机电系统(MEMS)生产了一种用于指针式手表的全新手表电机,与目前手表中使用的标准步进电机相比,其尺寸缩小一半,效率大约是前者的3倍。

关键词：指针式初创公司智能手表电机技术步进电机贝桑松大力推进

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技术突破可实现无稀土电动汽车

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科技纵览 2024年第5期 12-13页

作者： glenn Zorpette 不详

磁性材料有助于打破垄断。随着全球制造的电动汽车和卡车越来越多,围绕建造性能卓越、绿色的理想汽车的竞争正在展开。竞争目标是研制一种牵引电机,其功率、可靠性和重量至少与当今行业标准的稀土永磁同步电机一样,但不含稀土元素。钕... 详细信息

磁性材料有助于打破垄断。随着全球制造的电动汽车和卡车越来越多,围绕建造性能卓越、绿色的理想汽车的竞争正在展开。竞争目标是研制一种牵引电机,其功率、可靠性和重量至少与当今行业标准的稀土永磁同步电机一样,但不含稀土元素。钕和等稀土元素带来了高昂的环境成本和供应链风险,而中国对这些元素持有近乎垄断的份额。

关键词：供应链风险稀土永磁同步电机电动汽车行业标准全球制造牵引电机磁性材料稀土元素

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下一代功率晶体管

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科技纵览 2024年第3期 7-9页

作者： glenn Zorpette 不详

过去十年里,半导体领域里最半导体SEMICONDUCTORS大的事件之一就是传统硅在电力电子领域黯然失色,碳化硅(SiC)禾和镓氮化物(GaN)占据了数十亿美元的市场份额。随着这些新材料在重要领域的应用,自然而然地出现了一个问题:下一代新的功率... 详细信息

过去十年里,半导体领域里最半导体SEMICONDUCTORS大的事件之一就是传统硅在电力电子领域黯然失色,碳化硅(SiC)禾和镓氮化物(GaN)占据了数十亿美元的市场份额。随着这些新材料在重要领域的应用,自然而然地出现了一个问题:下一代新的功率半导体会是什么材料?

关键词：功率晶体管功率半导体半导体领域电力电子氮化物市场份额 SEMICON 下一代

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Testosterone and metabolic syndrome

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Asian Journal of Andrology 2015年第2期17卷 192-196,I0006页

作者： glenn R Cunningham Departments of Medicine and Molecular and Cellular Biology Baylor College of Medicine Baylor St. Luke's Medical Center 6624 Fannin Suite 1180 Houston TX 77030 USA.

Controversies surround the usefulness of identifying patients with the metabolic syndrome （MetS）. Many of the components are accepted risk factors for cardiovascular disease （CVD）. Although the MetS as defined includes many men with insulin resistance, insulin resistance is not universal. The low total testosterone （TT） and sex hormone binding globulin （SHBG） levels in these men are best explained by the hyperinsulinism and increased inflammatory cytokines that accompany obesity and increased waist circumference. It is informative that low SHBG levels predict future development of the MetS. Evidence is strong relating low TT levels to CVD in men with and without the MetS; however, the relationship may not be causal. The recommendations of the International Diabetes Federation for managing the MetS include cardiovascular risk assessment, lifestyle changes in diet, exercise, weight reduction and treatment of individual components of the MetS. Unfortunately, it is uncommon to see patients with the MetS lose and maintain a 10% weight loss. Recent reports showing testosterone treatment induced dramatic changes in weight, waist circumference, insulin sensitivity, hemoglobin Alc levels and improvements in each of the components of the MetS are intriguing. While some observational studies have reported that testosterone replacement therapy increases cardiovascular events, the Food and Drug Administration in the United States has reviewed these reports and found them to be seriously flawed. Large, randomized, placebo-controlled trials are needed to provide more definitive data regarding the efficacy and safety of this treatment in middle and older men with the MetS and low TT levels.

关键词： cardiovascular risk metabolic syndrome sex hormone binding globulin testosterone testosterone replacement therapy

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Protein-based profiling of the human IgA1 clonal repertoire revealed shared clones of serum polymeric IgA1 and milk secretory IgA1

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Cellular & Molecular Immunology 2023年第3期20卷 305-307页

作者： Jan Novak matthew B.Renfrow R.glenn King Colin Reily Todd J.Green Department of Microbiology University of Alabama at BirminghamBirminghamALUSA Department of Biochemistry and Molecular Genetics University of Alabama at BirminghamBirminghamALUSA

Human adaptive immunity involves the production and secretion of antibodies by differentiated B cells(ie.,antibody-secreting cells,also called plasma cells)in response to *** secreted antigen-specific antibodies are immunoglobulins that are present at substantial concentrations in blood,mucosal secretions,and breast ***,human immunoglobulins consist of two identical heavy(H)chains and two identical light(L)chains that are connected by disulfide bridges to form a homodimer of heterodimers(ie.,H+Ll2).Each heterodimer consists of one H chain linked with one L chain,whereas the homodimer is formed by linking two H chains *** genes for both the L and H chains are encoded by ligated gene segments that are genetically rearranged during V(D)J recombination,a process that endows each B cell with a unique receptor,giving rise to the enormous diversity of the B-cell antigen receptor repertoire.

关键词： IgA1 immunity chains

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Improved properties and thermal stability of a titanium-stainless steel solid-state weld with a niobium interlayer

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Journal of Materials Science & Technology 2021年第20期79卷 191-204页

作者： Jianxiong Li Anupam Vivek glenn Daehn Department of Materials Science and Engineering The Ohio State University2041 College RoadColumbusOH43210USA

Stainless steel(SS)and titanium alloys can be welded in the solid-state by high speed oblique ***,the effect of a niobium(Nb)interlayer on weld strength and thermal stability is *** Ti/SS and Ti/Nb/SS welds were subjected to thermal exposure ranging from 300℃ to 950℃ for 1.5 *** exposure monotonically decreases the strength and toughness of the Ti/SS pair with a dramatic falloff in strength and change in failure mode from partial pullout failure to full interfacial fracture at 600℃.With the interlayer,toughness was increased versus baseline up to 700℃ thermal exposure and then intermetallic formation again caused falloff in *** for the production,properties and applications of these classes of welds are provided.

关键词： Impact spot welding Titanium alloy Stainless steel Nb interlayer Thermal exposure Phase transformation

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