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Cementless Semi-Constrained Rotating Platform Total Knee Replacement: A Concise follow-Up of a Previous Report at a Minimum of Twenty Years

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Open Journal of Orthopedics 2023年第3期13卷 71-77页

作者： frederick f. Buechel Sr. frederick f. Buechel Jr. Thomas E. Helbig Rutgers NJ Medical School Newark USA South Mountain Orthopaedic Associates South Orange USA Lenox Hill Hospital New York USA

Background: A previous report evaluated the initial 310 cementless, Buechel-Pappas (B-P), Semi-Constrained Rotating Platform total knee replacements in 257 patients followed for an average of 7.6 years, range 2 - 18 years. Diagnoses were osteoarthritis in 233 patients, post traumatic arthritis in 4 patients and rheumatoid arthritis in 22 patients. Knee Scores, using a strict knee scoring scale were 86.4% excellent, 12.3% good, 0.3% fair and 1.0% poor results. Survivorship, using an end point of revision for any mechanical reason (including component loosening, bearing wear and bearing dislocation) was 99.4%. Survivorship for a poor knee score (including persistent pain, loosening, instability and infection was 97.6%. The purpose of the present study is to report the updated results of this same patient cohort at a minimum follow-up of twenty years. Methods: The average age of patients at the time of surgery was 67 years, range 34 to 91 years. A total of 20 patients (22 knees) were still living, with a follow-up of 20 - 30 years (mean 23.47 years). The same strict knee scoring scale and survivorship analysis were used to evaluate patient outcomes at the 20 to 30 years interval. Results: Survivorship, in the current study, using the same end points as in the previous study, was 96.5% at the 20 and 30-year intervals. Late mechanical failure and osteolysis were not identified. Conclusion: This cementless, semi-constrained rotating platform total knee replacement has stood the test of time for more than 20 years and can be considered acceptable for long-term use, in properly selected patients.

关键词： Knee Replacement Cementless Semi-Constrained Rotating

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欧洲钢铁冶金的进展

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钢铁 1991年第2期26卷 70-78页

作者： f.Oeters E.Gorl 柏林工业大学赫施钢厂

本文介绍欧洲及一些发达国家的钢铁工业及钢铁冶金学的进展。以管线用钢和深冲钢的生产,以及新炼铁方法的开发作为事例,对于应用液态金属系统的动力学和过程模拟来解决把冶金知识转化为生产实践的方法作了较深入的讨论,并对基础研究工... 详细信息

本文介绍欧洲及一些发达国家的钢铁工业及钢铁冶金学的进展。以管线用钢和深冲钢的生产,以及新炼铁方法的开发作为事例,对于应用液态金属系统的动力学和过程模拟来解决把冶金知识转化为生产实践的方法作了较深入的讨论,并对基础研究工作的现状及今后努力方向作了说明。

关键词：欧州钢铁冶金进展

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EffECTS Of Pb COMPOUND ADDITIVES ON THE PROPERTIES Of YBa_2Cu_3O_(7-δ)

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Acta Metallurgica Sinica(English Letters) 2005年第2期18卷 145-148页

作者： f.H.Li Z.G.fan J.Wang C.S.Liu D.W.Soh Y.J.Cho SchoolofMaterialandMetallurgy NortheasternUniversityShenyang110004China MyongjiUniversity Yongjin449-728SouthKorea

The melting temperature and critical transition temperature Tc of YBa2Cu3O7-δ with deferent content additives of PbO and BaPbO3 were studied. When PbO was doped in YBa2Cu3O7-δ, the melting temperature of YBa2Cu3O7-δ was reduced, however its superconductivity was weakened. from the XRD pattern of the sintered mixture of YBa2Cu3O7-δ and PbO, it was known that there was a reaction between YBa2Cu3O7-δ and PbO, and the product was BaPbO3. Hence different contents of BaPbO3 (10mass%, 20mass% and 30mass%) were added in YBa2Cu3O7-δ. It was proved that there were no reactions between YBa2Cu3O7-δ and BaPbO3. And the superconductivity of the mixtures was much better than that of the samples with PbO additive.

关键词： YBa2Cu3O7-δ PbO additive melting temperature superconductivity

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BfRP加固损伤混凝土梁挠度计算方法

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交通运输工程学报 2014年第6期14卷 17-26页

作者：秦丽辉李岩王宗林 AL-DULAIMI A f N 东北农业大学水利与建筑学院黑龙江哈尔滨150030 哈尔滨工业大学交通科学与工程学院黑龙江哈尔滨150090 姆萨巴技术学院建筑工程系

为了准确计算玄武岩纤维增强复合材料（BfRP）加固损伤混凝土梁的挠度，为 BfRP 加固损伤混凝土梁的设计与施工提供理论依据，按照配筋率不同设计了11片试验梁进行试验，每组试验梁设置不同的 BfRP 布加固量与加载方法。计算了各试验梁... 详细信息

为了准确计算玄武岩纤维增强复合材料（BfRP）加固损伤混凝土梁的挠度，为 BfRP 加固损伤混凝土梁的设计与施工提供理论依据，按照配筋率不同设计了11片试验梁进行试验，每组试验梁设置不同的 BfRP 布加固量与加载方法。计算了各试验梁的荷载-挠度曲线，分析了未加固梁、1层 BfRP 布加固梁、2层 BfRP 布加固梁在不同初始荷载下的挠度变化规律。给出了 BfRP加固损伤混凝土梁跨中挠度的计算公式，对比了挠度计算值与实测值。分析结果表明：BfRP 加固混凝土梁的挠度受初始荷载和加固量的影响，有初始荷载的加固梁挠度较无初始荷载的加固梁挠度增大30％～94％，2层 BfRP 布加固梁的挠度较1层加固梁的挠度增大19％～42％，计算挠度时需考虑 BfRP 布滞后应变的影响；挠度计算值与实测值的最大差值平均为7．26 mm，初始荷载小与配筋率高的试验梁挠度计算值与实测值较为接近，可以用于实际工程计算。

关键词：桥梁工程损伤混凝土梁玄武岩纤维增强复合材料挠度加固初始荷载

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欧洲钢铁冶金的进展(续)

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钢铁 1991年第3期26卷 59-67页

作者： f.Oeters E.GorL 柏林工业大学赫施钢厂

3.熔融还原以熔融还原炼铁的情况〔30〕作为解决能源问题的例子。熔融还原有可能成为高炉炼铁的竞争者,是由于该工艺具有直接应用精矿粉;用煤代替焦炭;煤气回收率高,使一次能源消耗降低等重要优点。开发研究中的各种熔融还原法,大多采... 详细信息

3.熔融还原以熔融还原炼铁的情况〔30〕作为解决能源问题的例子。熔融还原有可能成为高炉炼铁的竞争者,是由于该工艺具有直接应用精矿粉;用煤代替焦炭;煤气回收率高,使一次能源消耗降低等重要优点。开发研究中的各种熔融还原法,大多采用矿石在固态预还原,然后再还原成液态铁水的两步法。熔融还原段的设备可分为以下两种(图20)。

关键词：钢铁冶金进展欧州

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Carbonaceous residues from biomass gasification as catalysts for biodiesel production

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Journal of Natural Gas Chemistry 2012年第3期21卷 246-250页

作者： Rafael Luque Antonio Pineda Juan C. Colmenares Juan M. Campelo Antonio A. Romero Juan Carlos Serrano-Ruiz Luisa f. Cabeza Jaime Cot-Gores Departamento de Quimica Organica Universidad de Cardoba Campus de Rabanales Edif icio Marie Curie E-14014 Cardoba Spain Universitat de Lleida GREA lnnovacio Concurrent Lleida Spain Universitat de Lleida GREA lnnovacio Concurrent Lleida Spain

Tars and alkali ashes from biomass gasification processes currently constitute one of the major problems in biomass valorisation, generating clogging of filters and issues related with the purity of syngas production. To date, these waste residues find no useful applications and they are generally disposed upon generation in the gasification process. A detailed analysis of these residues pointed out the presence of high quantities of Ca （〉30 wt%）. TG experiments indicated that a treatment under air at moderate temperatures （400-800 ~C） decomposed the majority of carbon species, while XRD indicated the presence of a crystalline CaO phase. CaO enriched valorized materials turned out to be good heterogeneous catalysts for biodiesel production from vegetable oils, providing moderate to good activities （50%-70% after 12 h） to fatty acid methyl esters in the transesterification of sunflower oil with methanol.

关键词： biomass gasification residues biodiesel catalyst calcium oxide

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循根溯源奠定基础

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北京大学学报（自然科学版） 2002年第B12期38卷 10-13,106-107页

作者： f.威尔泽克朱星普林斯顿自然科学学院高级研究所

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Chemical speciation of copper and manganese in solution of a copper-contaminated soil and young grapevine growth with amendment application

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Pedosphere 2023年第3期33卷 496-507页

作者： Daniela Basso fACCO Edicarla TRENTIN Gerson Laerson DRESCHER Rodrigo Knevitz HAMMERSCHMITT Carlos Alberto CERETTA Leandro Souza DA SILVA Gustavo BRUNETTO Paulo Ademar Avelar ferreira Department of Soil Science Federal University of Santa MariaSanta Maria 97105-900(Brazil) University of Arkansas System Division of Agriculture Arkansas 72704(USA) federal University of Santa Maria Campus Cachoeira do SulCachoeira do Sul 96506-310(Brazil)

Copper(Cu)-based fungicide application to control foliar diseases in grapevine(Vitis vinifera L.)can increase soil Cu *** soils have high natural Cu and manganese(Mn)concentrations,increasing the potential for toxicity to grapevine *** of amendment substances can reduce the concentrations of toxic chemical species of Cu and Mn in soil solution,especially for the soils grown with young *** evaluated the chemical speciation of Cu and Mn in soil solution and young grapevine growth using a contaminated soil with amendment *** seedlings of Paulsen 1103rootstock were grown for 12 months on an old vineyard(>30 years of cultivation)soil without(control)and with vermicompost or limestone *** dry matter,root morphological characteristics,and plant tissue Cu and Mn concentrations were *** cation and anion concentrations,dissolved organic carbon,p H,and chemical speciation of Cu and Mn in soil solution from different soil layers were *** application did not reduce Cu and Mn phytotoxicity,and grapevine plants died after winter *** soluble Mn concentration in soil(5.56 mg L-1in 0–45 cm soil layer)and Mn concentration in plant tissue at pruning(380.8 mg kg-1)might be the primary cause of plant *** application reduced Cu2+and Mn2+chemical species in soil solution,thereby increasing plant *** Cu2+and Mn2+species were negatively correlated(Pf the trial(r=-0.73 and-0.51,respectively).Limestone application increased grapevine shoot and root dry matter production by 36%and 41%,respectively,while also presenting the highest root length and volume in the 5–10 cm soil *** application is a viable and profitable alternative for reducing soil Cu and Mn availability and their phytotoxic effects.

关键词： bioavailability heavy metal limestone phytoxicity vermicompost vineyard Visual MINTEQ

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Retroperitoneal kidney transplantation with liver and native kidney mobilization:a safe technique for pediatric recipients

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World Journal of Pediatrics 2023年第5期19卷 489-501页

作者： Juliano Riella Raphealla ferreira Marina M.Tabbara Phillipe Abreu Lucas Ernani Marissa Defreitas Jayanthi Chandar Jeffrey J.Gaynor Javier González Gaetano Ciancio Department of Surgery University of Miami Miller School of MedicineJackson Memorial HospitalMiamiFLUSA Department of Urology University of Miami Miller School of MedicineJackson Memorial HospitalMiamiFLUSA Department of Pediatrics Division of NephrologyUniversity of Miami Miller School of MedicineJackson Memorial HospitalMiamiFLUSA Miami Transplant Institute University of Miami Miller School of MedicineJackson Memorial Hospital1801 NW 9Th Ave7Th FloorMiamiFL 33136USA Servicio de Urología Unidad de Trasplante RenalHospital General Universitario Gregorio MarañónMadridSpain

Background Pediatric kidney transplant(KT)using larger,deceased or living donor adult kidneys can be challenging in the pediatric population due to limited space in the *** and native kidney(L/NK)mobilization techniques can be used in smaller and younger transplant recipients to aid in retroperitoneal placement of the renal ***,we compare the clinical outcomes of pediatric retroperitoneal KT with and without L/NK *** We retrospectively analyzed pediatric renal transplant recipients treated between January 2015 and May *** and recipient demographics,intraoperative data,and recipient outcomes were *** were divided into two groups according to the surgical technique utilized:with L/NK mobilization(Group 1)and without L/NK mobilization(Group 2).Baseline variables were described using frequency distributions for categorical variables and means and standard errors for continuous *** of association with the likelihood of using L/NK mobilization were performed using standardχ2 tests,t tests,and the log-rank *** forty-six pediatric recipients were evaluated and categorized into Group 1(n=26)and Group 2(n=20).Recipients in Group 1 were younger(6.7±0.8 years vs.15.3±0.7,Pfer between Groups 1 and *** urologic complication was encountered in Group 2;no vascular or surgical complications were observed in either ***,no stents or drains were used in any of the *** were no cases of delayed graft function or graft primary *** median follow-up of the study was 24.6 months *** patients developed death-censored graft failure(both in Group 2,P=0.22),and there was one death with a functioning graft(in Group 2,P=0.21).Conclusions Retroperitoneal liver/kidney mobilization is a feasible an

关键词： Extraperitoneal approach Liver and kidney mobilization Pediatric kidney surgical technique Transplantation

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INfLUENCE Of SO_4^(2-) AND Cl-ON THE CORROSION BEHAVIOR Of COPPER TUBE IN AIR-CONDITIONING SYSTEM

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Acta Metallurgica Sinica(English Letters) 2004年第1期17卷 92-96页

作者： C.S.Wu Z.Zhang f.H.Cao J.Q.Zhang J.M.Wang C.N.Cao Department of Chemistry Yuquan CampusZhejiang University Hangzhou 310027ChinaDepartment of Chemistry Yuquan CampusZhejiang University Hangzhou 310027ChinaDepartment of Chemistry Yuquan CampusZhejiang University Hangzhou 310027ChinaDepartment of Chemistry Yuquan CampusZhejiang University Hangzhou 310027China State Key Laboratory for Corrosion and Protection of Metals Shenyang 110016 ChinaDepartment of ChemistryYuquan Campus Zhejiang University Hangzhou 310027ChinaDepartment of ChemistryYuquan Campus Zhejiang University Hangzhou 310027China State Key Laboratory for Corrosion and Protection of MetalsShenyang 110016 China

The influence of chloride or sulphur dioxide on the corrosion behavior of copper tube in the air-conditioning system was studied using scanning electron microscope (SEM), energy dispersion spectrometer (EDS) and cyclic polarization techniques. The results showed that the corrosion of copper tube are mainly caused by the SO42- and Cl- ions in the circulating water, and the former is mainly responsible for the general corrosion of the copper tube whilst the latter for the pitting corrosion. The different influences of SG42- and Cl- ions on the corrosion type of copper tube may be attributed to that the radius of SO42- ion is much larger than that of Cl- ion. Meanwhile the results also indicated that SO42- inhibits the pitting corrosion caused by Cl- and Cl- inhibits the general corrosion initiated by SO42- due to their competitive adsorption on the copper matrix.

关键词： copper corrosion behavior influence SO42- ion Cl- ion

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