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Performance and safety Improvement of Induction Motors based on Testing and Evaluation standards

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CEs Transactions on Electrical Machines and systems 2024年第3期8卷 310-318页

作者： Nkosinathi s.Khumalo Ntombizotwa P.Memane Udochukwu B.Akuru Department of Electrical Engineering Tshwane University of TechnologyPretoria 0183South Africa

The induction motor,which converts electrical energy into mechanical energy,has been recognized as the cornerstone of *** rotor of an induction motor can be either a squirrel cage rotor or a wound-type rotor,both existing as magnetless ***-phase squirrel cage induction motors are frequently utilized in industrial drives because they are dependable,have high starting torque,are selfstarting and ***-phase induction motors,on the other hand,are commonly used for small loads such as domestic appliances in form of modest fans,pumps and electric power *** south Africa,there have been reports of fires and explosions resulting in live and property loss because of induction motors that have not been thoroughly tested or are incorrectly labelled in terms of ratings,electrical safety and *** goal of this study is targeted at preventing end-user injuries and failures caused by non-compliant induction motors,by evaluating locally manufactured/imported induction motors based on tests and evaluation from standards(IEC and sans).The study is conducted using experimental procedures at the Explosion Prevention Technology and Rotating Machines(EPT and RM)laboratory,south African Bureau of standards(sABs),south *** main finding from the study shows differences in the nameplate characteristics of various induction motors which could have detrimental effects such as production and operational downtime in their end-use industries,at later stages.

关键词： Compliance Induction motors International Electro-Technical standards(IEC) Nameplate Experimental tests south African National standards(sans)

Are we giving azathioprine too late? The case for early immunomodulation in inflammatory bowel disease

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World Journal of Gastroenterology 2008年第36期14卷 5512-5518页

作者： María Josefina Etchevers Montserrat Aceituno Miquel sans Department of Gastroenterology Hospital Posadas Buenos Aires Argentina Department of Gastroenterology Hospital Clínic i Provincial/IDIBAPS Barcelona CIBER Enfermedades Hepáticas y Digestivas Spain

Inflammatory bowel disease (IBD) includes two entities, Crohn’s disease and ulcerative colitis. Both are chronic conditions with frequent complications and surgical procedures and a great impact on patient’s quality of life. The thiopurine antimetabolites azathioprine and 6-mercaptopurine are widely used in IBD patients. Current indications include maintenance therapy, steroid-dependant disease, fistula closure, prevention of infliximab immunogenicity and prevention of Crohn’s disease recurrence. surprisingly, the wide use of immunosuppressants in the last decades has not decreased the need of surgery, probably because these treatments are introduced at too late stages in disease course. An earlier use of immunossupressants is now advocated by some authors. The rational includes: (1) failure to modify IBD natural history of present therapeutic approach, (2) demonstration that azathioprine can induce mucosal healing, a relevant prognostic factor for Crohn’s disease and ulcerative colitis, and (3) demonstration that early immunossupression has a very positive impact on pediatric, recently diagnosed Crohn’s disease patients. We are now awaiting the results of new studies, to clarify the contribution of azathioprine, as compared to infliximab (sONIC study), and to demonstrate the usefulness of azathioprine in recently diagnosed adult Crohn’s disease patients (AZTEC study).

关键词： Inflammatory bowel disease Crohn's disease Ulcerative colitis Immunosuppressants Azathioprine

Influence of EfOM on the Oxidation of Micropollutants by Ozone and UVIH2O2 in secondary Effluents

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Journal of Environmental science and Engineering 2011年第6期5卷 789-798页

作者： s.P. Vieira R.F. Dantas s. Esplugas C. sansx C. sans M. Dezotti Federal University of Rio de Janeiro Rio de Janeiro 21941-972 Brazil Chemical Engineering Department University of Barcelona Barcelona Marti i Franquks 1 08028 Spain

The aim of this work was to study the influence of effluent organic matter （EfOM） on micropollutants removal by ozone and UV/H2O2. To perform the experiments, deionized water and municipal secondary effluents （sE） were artificially contaminated with atrazine （ATZ） and treated by the two proposed methods. ATZ concentration, COD and TOC were recorded along the reaction time and used to evaluate EfOM effect on the system efficiency. Results demonstrate that the presence of EfOM can significantly reduce the micropollutant removal rate due to competition of EfOM components to react with radicals and/or molecular ozone. The hydroxyl radical scavenging caused by EfOM was quantified as well as the contribution of molecular ozone and .OH radicals during the ozonation of sE. EfOM components promoted higher inhibition of ATZ oxidation by hydroxyl radicals than by molecular ozone.

关键词： secondary effluents effluent organic matter UV/I-I202 ozonation atrazine pesticides

Evaluation of 5 versus 10 granulocyteaphaeresis sessions in steroid-dependent ulcerative colitis: A pilot, prospective, multicenter, randomized study

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World Journal of Gastroenterology 2007年第15期13卷 2193-2197页

作者： Elena Ricart Maria Esteve Montserrat Andreu Francesc Casellas David Monfort Miquel sans Natalia Oudovenko Raúl Lafuente Julián Panés Hospital de sant Pau Barcelona Spain Hospital Mútua de Terrassa Terrassa Spain Hospital del Mar Barcelona Spain Hospital de la Vall d'Hebró Barcelona Spain Hospital Clínic CIBER-EHD BarcelonaSpain Otsuka Pharmaceutical spain

AIM： To evaluate the efficacy of 5 compared to ：tO granulocyteaphaeresis sessions in patients with active steroid-dependent ulcerative colitis. METHODs： In this pilot, prospective, multicenter randomized trial, 20 patients with moderately active steroid-dependent ulcerative colitis were randomized to 5 or 10 granulocyteaphaeresis sessions. The primary objective was clinical remission at wk 17. secondary measures included endoscopic remission and steroid consumption.REsULTs： Nine patients were randomized to 5 granulocyteaphaeresis sessions （group 1） and 11 patients to 10 granulocyteaphaeresis sessions （group 2）. At wk 17, 37.5% of patients in group 1 and 45.45% of patients in group 2 were in clinical remission. Clinical remission was accompanied by endoscopic remission in all cases. Eighty-six percent of patients achieving remission were steroid-free at wk 17. Daily steroid requirements were significantly lower in group 2. Eighty-nine per cent of patients remained in remission during a one year follow-up. One serious adverse event, not related to the study therapy, was reported. CONCLUsION： Granulocyteaphaeresis is safe and effective for the treatment of steroid-dependent ulcerative colitis. In this population, increasing the number of aphaeresis sessions is not associated with higher remission rates, but affords a significant steroid-sparing effect.

关键词： Ulcerative colitis Granulocyteaphaeresis steroid-dependence Inflammatory bowel diease treatment

Anemia in patients with high-risk acute coronary syndromes admitted to Intensive Cardiac Care Units

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Journal of Geriatric Cardiology 2020年第1期17卷 35-42页

作者： Victoria Lorente Jaime Aboal Cosme Garcia Jordi sans-Rosello Antonia sambola Rut Andrea Carlos Tomas Gil Bonet David Vinas Nabil el Ouaddi santiago Montero Javier Cantalapiedra Margarida Pujol Isabel Hernandez Maria Perez-Rodriguez Isaac Llao Jose C sanchez-salado Miquel Gual Albert Ariza-sole 无 Hospital Universitari de Bellvitge L’Hospitalet de LlobregatBarcelonaSpain Hospital Unversitari Josep Trueta GironaSpain Hospital Universitari Germans Trias i Pujol Badalona BarcelonaSpain Hospital de la santa Creu i sant Pau Instituto de Investigación Biomedica IIB Sant PauUniversitat Autonoma de Barcelona(UAB)BarcelonaSpain Hospital Universitari de la Vall d’Hebron BarcelonaSpain Hospital Clinic i Provicial BarcelonaSpain Hospital Arnau de Vilanova LleidaSpain Hospital Joan XXIII TarragonaSpain the Grup de Treball de Cures Agudes Cardiologiques de la societat Catalana de Cardiologia

Background Little information exists about the role of anemia in patients with acute coronary syndromes(ACs)admitted to Intensive Cardiac Care Units(ICCU).The aim of this study was to assess the prevalence of anemia and its impact on management and outcomes in this clinical *** All consecutive patients admitted to eight different ICCUs with diagnosis of non-sT segment elevation ACs(NsTEACs)were prospectively *** was defined as hemoglobinssociation between anemia and mortality or readmission at six months was assessed by the Cox regression *** A total of 629 patients were *** age was 66.6 years.A total of 197 patients(31.3%)had *** angiography was performed in most patients(96.2%).Patients with anemia were significantly older,with a higher prevalence of comorbidities,poorer left ventricle ejection fraction and higher GRACE score *** with anemia underwent less often coronary angiography,but underwent more often intraaortic counterpulsation,non-invasive mechanical ventilation and renal replacement *** ICCU and hospital stay were significantly longer in patients with *** the incidence of mortality(HR=3.36,95%CI:1.43–7.85,P=0.001)and the incidence of mortality/readmission were significantly higher in patients with anemia(HR=2.80,95%CI:2.03–3.86,P=0.001).After adjusting for confounders,the association between anemia and mortality/readmission remained significant(P=0.031).Conclusions Almost one of three NsTEACs patients admitted to ICCU had *** patients underwent coronary *** was independently associated to poorer outcomes at 6 months.

关键词： Acute coronary syndromes Anemia Intensive cardiac care units Prognosis

Frequency of Emerging Parasites in HIV/AIDs and Oncological Patients stool by Coprological and Molecular Analysis

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Advances in Infectious Diseases 2013年第3期3卷 162-171页

作者： Enedina Jiménez-Cardoso Leticia Eligio-García Apolinar Cano-Estrada Adrian Cortés-Campos Aurora Medina-sansón Diana Molina-Martínez Children Hospital of Mexico Mexico City Mexico

The purpose of this study was to determine the frequency of emerging parasites in two groups of immunosuppressed patients, including individuals infected with the human immunodeficiency virus (AIDs) (HIV) or having acute lymphoblastic leukemia (ALL) with or without diarrhea. stool samples were collected from 96 HIV and 77 ALL patients from March 2010 through December 2011. screening for opportunistic parasites was carried out by the coproparasitoscopic Faust method, Ziehl Neelsen staining, and Polymerase Chain Reaction (PCR). Results showed that 22.9% of HIV fecal samples were positive for emerging parasites, including Cryptosporidium spp. (7.3%), Microsporidium spp. (5.2%), Isospora belli (1.0%), Giardia intestinalis (2.6%), and Cyclospora spp. (7.3%). On the other hand, 32.5% of ALL fecal samples were positive for emerging parasites, including Cryptosporidium spp. (9.1%), Microsporidium spp. (19.5%), Isospora belli (1.3%), and Giardia intestinalis (2.6%). Our results highlighted the need for specific, efficient, and reliable diagnostic methods to identify the presence of emerging parasites in immunocompromised patients susceptible to different infectious diseases or neoplastic processes and avoid the consequences for the host as an increased disease rate, alterations in the clinical manifestation of the infection or even exacerbation of its course.

关键词： Leukemia HIV Emerging Parasites Microsporidium Cryptosporidium spp. Giardia Intestinalis Cyclospora Isospora Belli

经皮经导管射频消融去肾交感神经术与螺内酯对难治性高血压昼夜节律和血压变异性的影响

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中华高血压杂志 2017年第8期25卷 798-798页

作者： de la sierra A Pareja J Armario P Barrera  Yun s Vázquez s sans L Pascual J Oliveras A 陈云叶鹏

经皮经导管射频消融去肾交感神经术（sympathetic renal denervation,sRD）可作为药物控制不佳的难治性高血压患者的一种替代治疗方法,sRD对减少短期血压变异性（blood pressure variability,BPV）有效。然而,这个作用尚未在随机对照试... 详细信息

经皮经导管射频消融去肾交感神经术（sympathetic renal denervation,sRD）可作为药物控制不佳的难治性高血压患者的一种替代治疗方法,sRD对减少短期血压变异性（blood pressure variability,BPV）有效。然而,这个作用尚未在随机对照试验中证实。本研究旨在比较螺内酯和sRD对昼夜血压和BPV的影响。方法：对一项随机试验进行析因分析,

关键词：经导管射频消融血压变异性血压昼夜节律难治性螺内酯经术交感随机对照试验

Gastrointestinal bleeding from Dieulafoy's lesion: Clinical presentation, endoscopic findings, and endoscopic therapy

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World Journal of Gastrointestinal Endoscopy 2015年第4期7卷 295-307页

作者： Borko Nojkov Mitchell s Cappell Division of Gastroenterology and Hepatology William Beaumont Hospital Oakland University William Beaumont school of Medicine

Although relatively uncommon, Dieulafoy's lesion is an important cause of acute gastrointestinal bleeding due to the frequent difficulty in its diagnosis; its tendency to cause severe, life-threatening, recurrent gastrointestinal bleeding; and its amenability to life-saving endoscopic therapy. Unlike normal vessels of the gastrointestinal tract which become progressively smaller in caliber peripherally, Dieulafoy's lesions maintain a large caliber despite their peripheral, submucosal, location within gastrointestinal wall. Dieulafoy's lesions typically present with severe, active, gastrointestinal bleeding, without prior symptoms; often cause hemodynamic instability and often require transfusion of multiple units of packed erythrocytes. About 75% of lesions are located in the stomach, with a marked proclivity of lesions within 6 cm of the gastroesophageal junction along the gastric lesser curve, but lesions can also occur in the duodenum and esophagus. Lesions in the jejunoileum or colorectum have been increasingly reported. Endoscopy is the first diagnostic test, but has only a 70% diagnostic yield because the lesions are frequently small and inconspicuous. Lesions typically appear at endoscopy as pigmented protuberances from exposed vessel stumps, with minimal surrounding erosion and no ulceration(visible vessel sans ulcer). Endoscopic therapy, including clips, sclerotherapy, argon plasma coagulation, thermocoagulation, or electrocoagulation, is the recommended initial therapy, with primary hemostasis achieved in nearly 90% of cases. Dual endoscopic therapy of epinephrine injection followed by ablative or mechanical therapy appears to be effective. Although banding is reportedly highly successful, it entails a small risk of gastrointestinal perforation from banding deep mural tissue. Therapeutic alternatives after failed endoscopic therapy include repeat endoscopic therapy, angiography, or surgical wedge resection. The mortality has declined from about 30% during

关键词： Dieulafoy's lesion Gastrointestinal bleeding

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结构陶瓷蠕变损伤的发展

力学进展 1997年第2期27卷 264-275页

作者： Chan Kwai s Page Richard A 美国德克萨斯sanAntonio西南研究所

结构陶瓷蠕变断裂或因遍及材料内部的晶界孔洞的成核、生长及合并引起，或因其内部的主要缺陷的生长引起．本文综述了用小角度中子散射（ＳＡＮＳ）方法得到的最新实验结果和立体映象应变分析；并将它们用于回答大量的与上述两种机理有... 详细信息

结构陶瓷蠕变断裂或因遍及材料内部的晶界孔洞的成核、生长及合并引起，或因其内部的主要缺陷的生长引起．本文综述了用小角度中子散射（ＳＡＮＳ）方法得到的最新实验结果和立体映象应变分析；并将它们用于回答大量的与上述两种机理有关的关键性问题．用ＳＡＮＳ结果及其它相关的研究结果考察了晶界孔洞的成核、生长过程．演示并讨论了孔洞的随机性．把蠕变裂纹生长过程描述为直接质量传输过程或损伤区生长过程．提出了与损伤区生长有关的新的立体映象应变分析结果。

关键词：陶瓷蠕变损伤蠕变断裂晶界孔洞孔洞成核