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More than 10 Years of Experience with Immediate Sequential Bilateral Cataract Extraction (ISBCE)--A Retrospective Study

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Open Journal of Ophthalmology 2014年第4期4卷 139-144页

作者： ivo guber Ciara Bergin Jorg Stürmer Department of Ophthalmology Kantonsspital WinterthurZürichSwitzerland Jules gonin Eye Hospital University of LausanneLausanneSwitzerland

Background: To evaluate the safety of immediate sequential bilateral cataract extraction (ISBCE) with respect to indications, visual outcomes, complications, benefits and disadvantages. Methods: This is a retrospective review of all ISBCEs performed at Kantonsspital Winterthur, Switzerland, between April 2000 and September 2013. The case notes of 500 eyes of 250 patients were reviewed. Of these 500 eyes, 472 (94.4%) had a straight forward phacoemulsification with posterior chamber intraocular lens implantation;21 (4.2%) had a planned extracapsular cataract extraction;4 (0.8%) had an intracapsular cataract extraction and 3 (0.6%) had a combined phacoemulsification with trabeculectomy. Results: Over 66% of eyes achieved improved visual acuity (at least 3 Snellen lines) following ISBCE. Median preoperative best corrected visual acuity (BCVA) was 0.5 LogMAR;the interquartile range was [0.4, 1] LogMAR. At one week control the median BCVA was 0.3 LogMAR, IQR [0.1, 0.5] LogMAR. At one month the median BCVA was 0.15 LogMAR, IQR [0.05, 0.3] (p ght-threatening intraoperative or postoperative complications observed. Conclusions: ISBCE is an effective and safe option with high degree of patient satisfaction. The relative benefits of ISBCE should be balanced against the theoretically enhanced risks.

关键词： Cataract Cataract Surgery Immediate Sequential Bilateral Cataract Extraction

Stroke in COVID-19: a single-centre initial experience in a hotspot of the pandemic

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Stroke & Vascular Neurology 2020年第4期5卷 331-336页

作者： ivo Bach pratibha Surathi Nora Montealegre Osama Abu-Hadid Sara Rubenstein Sviatoslav Redko Siddharth gupta Machteld Hillen pratit patel priyank Khandelwal Adham Kamel Department of Neurology and Neurosciences New Jersey Medical SchoolNewarkNew JerseyUSA Department of Neurological Surgery New Jersey Medical SchoolNewarkNew JerseyUSA

Background COVID-19,caused by SARS-CoV-2,is a global pandemic that has been an immense burden on healthcare systems all over the *** patients may be at higher risk for acute ischaemic stroke(AIS).We present our experience with AIS in patients with *** We reviewed all patients admitted to our hospital during a 6-week period with a positive nasopharyngeal swab test for *** these patients,we identified *** reviewed the demographics,clinical,laboratory,imaging characteristics,treatments received and outcomes of AIS in patients with *** We identified 683 patients admitted with COVID-19 during the study period,of which 20 patients had ***-vessel occlusion(LVO)was noted in 11 patients(55%).Intravenous alteplase was administered in four patients(20%)and mechanical thrombectomy was performed in five patients(25%).Respiratory symptoms preceded the onset of AIS in most of the patients(70%)by 1 to 21 *** in patients with AIS was 50%compared with 26%of all COVID-19 *** of these patients died due to non-neurological causes(70%).Three patients with AIS had clinical and imaging findings consistent with COVID-19,but were negative for multiple nasopharyngeal swab *** LVO was more common in patients with AIS and *** had more severe disease and higher mortality *** of the patients had respiratory symptoms preceding AIS by days to *** could explain certain patients with clinical picture of COVID-19 but negative nasopharyngeal swab tests.

关键词： admitted nasopharyngeal acute

Understanding the corrosion of Mg alloys in in vitro urinary tract conditions: A step forward towards a biodegradable metallic ureteral stent

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Journal of Magnesium and Alloys 2023年第11期11卷 4301-4324页

作者： Margarida pacheco ivo M.Aroso Joana M.Silva Sviatlana V.Lamaka Jan Bohlen Maria Nienaber Dietmar Letzig Estêvão Lima Alexandre A.Barros Rui L.Reis 3B’s Research group-Research Institute on Biomaterials Biodegradables and BiomimeticsUniversity of MinhoGuimarãesPortugal ICVS/3B’s-pT government Associate Laboratory Braga/GuimarãesPortugal Institute of Surface Science Helmholtz-Zentrum hereon GmbHGermany Institute of Material and process Design Helmholtz-Zentrum hereon GmbHGermany School of Health Sciences Life and Health Sciences Research Institute(ICVS)University of MinhoBragaPortugal

Ureteral stents play a fundamental role in modern time urology. However, following the deployment, stent-related symptoms are frequent and affect patient health and quality of life. Using biodegradable metals as ureteral stent materials have emerged as a promising strategy, mainly due to the improved radial force and slower degradation rate expected. Therefore, this study aimed to characterize different biodegradable metals in urinary tract environment to understand their propensity for future utilization as base materials for ureteral stents. The corrosion of 5 Mg alloys - AZ31, Mg-1Zn, Mg-1Y, pure Mg, and Mg-4Ag - under simulated urinary tract conditions was accessed. The corrosion layer of the different alloys presented common elements, such as Mg(OH)_(2), MgO, and phosphate-containing products, but slight variations in their chemical compositions were detected. The corrosion rate of the different metals varied, which was expected given the differences in the corrosion layers. On top of this, the findings of this study highlighted the significant differences in the samples' corrosion and corrosion layers when in stagnant and flowing conditions. With the results of this study, we concluded that Mg-1Zn and Mg-4Ag presented a higher propensity for localized corrosion, probably due to a less protective corrosion layer;Mg-4Ag corroded faster than all the other four alloys,and Mg-1Y stood out due to its distinct corrosion pattern, that showed to be more homogeneous than all the other four samples, making this one more attractive for the future studies on biodegradable metals.

关键词： Biodegradable metals Magnesium alloys Localized corrosion Biodegradable metallic ureteral stent

Hopkinson Tensile Tests of Flat Specimens

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Journal of Mechanics Engineering and Automation 2013年第9期3卷 560-565页

作者： ivo Dohnal, Miroslav Slais Milan Forejt Libor Mrna Institute of Manufacturing Technology Faculty of Mechanical Engineering Brno University of Technology Brno 616 69 Czech Republic

The SHTBT （split Hopkinson tensile bar test） is used for the determination of mechanical material properties at high strain rates, in this case within 10^2-10^3 s^-1. The duration of impact loading is within the range of 40-100 μS. The principle of SHTBT is based on the measurement and evaluation of impact loading that is common in high strain rate processes. Strain gauges are usually used to record impact loading. In this case, cylindrical capacitance detectors were used. plastic deformation of metallic materials and alloys is a complex process that depends on a number of factors with the effect of strain rate being of particular importance. Dynamical tests are used for determination of mechanical properties; therefore, SHTBT is often used for these experiments. The present paper deals with possibilities of testing device for flat bars adapted at Hopkinson test. The aim of this work is concentrated on strain rate influence on 1.4301 austenitic steel, too.

关键词： Flat specimen stress-strain strain rate SHTBT.

Transcriptional Activation and production of Tryptophan-Derived Secondary Metabolites in Arabidopsis Roots Contributes to the Defense against the Fungal Vascular pathogen Verticillium Iongisporum

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Molecular plant 2012年第6期5卷 1389-1402页

作者： Tim Iven Stefanie Konig Seema Singh Susanna A. Braus-Stromeyer Matthias Bischoff Lutz F. Tietze gerhard H. Braus Volker Lipka ivo Feussner Wolfgang Droge-Laser Julius-Maximilians-Universitat Wurzburg Julius-von-Sachs-lnstitut Pharmazeutische Biologie Julius-von-Sachs-Platz 2 97082 Wurzburg Germany georg-August-Universitat Albrecht-von-Haller-lnstitut fur Pflanzenwissenschaften Biochemie der Pflanze Justus-von-Liebig-Weg 11 37077 GottingenGermany georg-August-Universitat Institut for Mikrobiologie und Genetik Molekulare Mikrobiologie und Genetik Grisebachstr. 8 37077 Gottingen Germany georg-August-Universitat Institut for Organische und Biomolekulare Chemie AG Tietze Tammannstrasse 2 37077 Gottingen Germany georg-August-Universitat Schwann-Schleiden-Forschungszentrum for Molekulare Zellbiologie Abteilung Zellbiologie der Pflanze Julia-Lermontowa-Weg3 37077 Gottingen Germany

The soil-borne fungal pathogen Verticillium Iongisporum causes vascular disease on Brassicaceae host plants such as oilseed rape. The fungus colonizes the root xylem and moves upwards to the foliage where disease symptoms become visible. Using Arabidopsis as a model for early gene induction, we performed root transcriptome analyses in re- sponse to hyphal growth immediately after spore germination and during penetration of the root cortex, respectively. Infected roots showed a rapid reprogramming of gene expression such as activation of transcription factors, stress-, and defense-related genes. Here, we focused on the highly coordinated gene induction resulting in the production of tryp- tophan-derived secondary metabolites. previous studies in leaves showed that enzymes encoded by CYp81F2 and pEN2 （pENETRATION2） execute the formation of antifungal indole glucosinolate （IgS） metabolites. In Verticillium-infected roots, we found transcriptional activation of CYp81F2 and the pEN2 homolog pEL 1 （pEN2-LIKE1）, but no increase in antifungal IgS breakdown products. In contrast, indole-3-carboxylic acid （13CA） and the phytoalexin camalexin accumulated in infected roots but only camalexin inhibited Verticillium growth in vitro. Whereas genetic disruption of the individual metabolic pathways leading to either camalexin or CYp81F2-dependent IgS metabolites did not alter Verticillium-induced disease symptoms, a cyp79b2 cyp79b3 mutant impaired in both branches resulted in significantly enhanced susceptibility. Hence, our data provide an insight into root-specific early defenses and suggest tryptophan-derived metabolites as active anti- fungal compounds against a vascular pathogen.

关键词： Verticillium Iongisporum Arabidopsis root transcriptome camalexin indole glucosinolates.

Hydrometallurgical processing of Brazilian Iron Ore Tailings for the Synthesis of pigments

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geomaterials 2022年第2期12卷 30-36页

作者： Vitor Otacílio de Almeida ivo André Homrich Schneider Department of Mining Engineering Federal University of Rio Grande do Sul Porto Alegre Brazil

The aim of this study was to investigate the synthesis of iron oxide pigments from IOT. The sample of IOT was obtained through mining activity of the Quadrilátero Ferrífero in the state of Minas gerais, Brazil. The procedure was carried out by hot acid leaching with hydrochloric acid (HCl) which allowed the recovery of about 95% of the iron in a liquor. The iron-based pigments—red (IBp_R), black (IBp_B), and yellow (IBp_Y)—were synthetised from the liquor by selective precipitation, crystallisation, and thermal procedures. The pigments were characterised by particle size distribution, mineral and chemical compositions, as well as colourimetric properties. The process of synthesis was successful and the procedure was shown to maximise the utilisation of mineral resources and minimise the environmental, social, and economic impacts associated with IOT disposal.

关键词： Iron Ore Tailings pigments Iron Oxide Waste Management Hydrometallurgy

Use of Corrosion Inhibitor in Solid Form to prevent Internal Corrosion of pipelines and Acidification process

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Journal of Materials Science and Chemical Engineering 2014年第5期2卷 1-6页

作者： Fernando B.Mainier pedro ivo Canesso guimaraes Escola de Engenharia Universidade Federal Fluminense(UFF)NiteróiRio de JaneiroBrazil Instituto de Química Universidade do Estado do Rio de Janeiro(UERJ)Rio de JaneiroBrazil

Use of corrosion inhibitors in solid form promotes the development of a new technique for internal corrosion protection of oil & gas pipelines and operations of oil wells acidification, because the controlled dissolution of the corrosion inhibitor forms a surface on metallic parts, a protective film that prevents or minimizes undesirable reactions to corrosion. In addition, this technique has important social and environmental benefits, ensures the operator has a lower risk of contamination when handling the product, changes the type of industrial packing, facilitates transportation, reduces solvent use and consequently reduces the waste that normally results from the use of inhibitors. The purpose of this article is to present a class of solid corrosion inhibitor tested in the laboratory and offer proposals for its application in industrial pipes such as gas and oil pipelines.

关键词： Corrosion Corrosion Inhibitor petroleum Acidification pipeline

Ladle Slag of Electric Steelmaking as Alkaline Agent on Controlling of Acid Mine Drainage generation

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Journal of Environmental protection 2013年第12期4卷 1-7页

作者： Luciana Angelita Machado Luisa Ventura de Freitas pedro ivo Chitolina Villetti Rejane Maria Candiota Tubino ivo Andre Homrich Schneider programa de pos-graduacao em Engenharia de Minas Metalurgica e de MateriaisSchool of EngineeringUniversidade Federal do Rio Grande do SulPorto AlegreBrazil Environmental Engineering School of EngineeringUniversidade Federal do Rio Grande do SulPorto AlegreBrazil

Commercial coal production in the southern region of Brazil (comprising the paraná, Santa Catarina, and Rio grande do Sul states) has been occurring since the beginning of the twentieth century. Regarding the Santa Catarina coalfields, about 60% - 65% of the ROM coal is discharged at dump deposits as waste. These wastes can lead to the formation of acid mine drainage (AMD), a source of ground and surface water pollution. One of the technologies used for preventing AMD consists of the alkaline additive method. Thus, the aim of this work was to study, at laboratory scale, the DAM control by blending coal waste with a metallurgical slag. A coal-tailing sample was collected from a coal mine, and the slag was obtained from a semi-integrated steel plant. Static tests were carried out by the acid-base account method to determine the balance between the acid-producing and acid-consuming (neutralizing) mineral components of the samples. Kinetic tests were conducted in humidity cells, following the ASTM D 5744-96 method, for a period of 80 weeks. The results showed that the coal tailing generates AMD. However, environmental problems can be minimized by mixing the coal waste with the metallurgical slag in 1:1 or 1:1.5 proportions. The kinetic experiments proved that, in this condition, the lixiviation presents a higher pH and a lower concentration of acidity, metals, and sulfate. Finally, it is possible to conclude that the blending slag in coal tailing deposits can be a viable alternative for DAM control in coal mining.

关键词： Acid Mine Drainage Coal Waste Ladle Slag of Electric Steelmaking pollution Control

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多产柴油的催化裂化动力学模型

华东理工大学学报（自然科学版） 2003年第4期29卷 355-358页

作者：欧阳福生 ivo de Brito J 江洪波翁惠新华东理工大学石油加工研究所上海200237

在已开发的重油催化裂化十一集总动力学模型的基础上,对参数估计方法进行了改进,建立了一步法确定模型动力学参数的方法,并通过一步法得到了MLC-500催化剂多产柴油裂化的动力学参数,模型的实验室验证表明,动力学参数是可靠的。

关键词：重油催化裂化参数估计动力学模型多产柴油