检索结果-南通市图书馆

Enhancement of the CO_(2)adsorption and hydrogenation to CH_(4)capacity of Ru–Na–Ca/γ–Al_(2)O_(3)dual function material by controlling the Ru calcination atmosphere

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2024年第6期140卷 292-305页

作者： Alejandro Bermejo-López Beñat Pereda-ayo Jon A.Onrubia-Calvo JoséA.González-Marcos Juan R.González-Velasco Department of Chemical Engineering Faculty of Science and TechnologyUniversidad del País Vasco UPV/EHUBarrio Sarrienas/n48940 LeioaBizkaiaSpain

Integrated CO_(2)capture and utilization(ICCU)technology requires dual functional materials(DFMs)to carry out the process in a single reaction *** influence of the calcination atmosphere on efficiency of 4%Ru-8%Na_(2)CO_(3)-8%CaO/γ-Al_(2)O_(3)DFM is *** adsorbent precursors are first co-impregnated onto alumina and calcined in ***,Ru precursor is impregnated and four aliquotes are subjected to different calcination protocols:static air in muffle or under different mixtures(10%H_(2)/N_(2),50%H_(2)/N_(2)and N_(2))*** are characterized by XRD,N_(2)adsorption-desorption,H_(2)chemisorption,TEM,XPS,H_(2)-TPD,H_(2)-TPR,CO_(2)-TPD and *** catalytic behavior is evaluated,in cycles of CO_(2)adsorption and hydrogenation to CH_(4),and temporal evolution of reactants and products concentrations is *** calcination atmosphere influences the physicochemical properties and,ultimately,activity of *** data and catalytic performance discover the acccomodation of Ru nanoparticles disposition and basic sites is mostly influencing the catalytic *** calcined under N_(2)flow(RuNaCa-N_(2))shows the highest CH_(4)production(449μmol/g at 370℃),because a well-controlled decomposition of precursors which favors the better accomodation of adsorbent and Ru phases,maximizing the specific surface area,the Ru-basic sites interface and the participation of different basic sites in the CO_(2)methanation ***,the calcination in a N_(2)flow is revealed as the optimal calcination protocol to achieve highly efficient DFM for integrated CO_(2)adsorption and hydrogenation applications.

关键词： CO_(2)methanation Integrated CO_(2)capture and utilization(ICCU) Dual functional material(DFM) Ru calcination atmosphere

Adult pancreatoblastoma: Current concepts in pathology

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2021年第26期27卷 4172-4181页

作者： ayo O Omiyale Department of Cellular Pathology Imperial College Healthcare NHS TrustLondon W68RFUnited Kingdom

Adult pancreatoblastoma is an exceptionally rare malignant tumour of the pancreas that mimics other solid cellular neoplasms of the pancreas,which may pose diagnostic *** of its rarity,little is known about its clinical and pathologic *** article reviews the clinical and pathologic features of pancreatoblastoma in adults including differential diagnosis,treatment,and *** pancreatoblastoma commonly occurs in childhood,there have now been more than 70 adult pancreatoblastomas described in the *** is a slight male *** are no symptoms unique to pancreatoblastomas and adult patients are frequently *** most common presenting symptom is abdominal ***,the tumours are often large and ***,pancreatoblastomas are composed of neoplastic cells with predominantly acinar differentiation and characteristic squamoid *** tumours are positive for trypsin,chymotrypsin,lipase,and *** of heterozygosity on chromosome 11p is the most common molecular alteration in *** pancreatoblastomas are aggressive tumours with frequent local invasion,recurrence,and distant *** consists of surgical *** and radiotherapy may have a role in the treatment of recurrent,residual,unresectable,and metastatic *** is important to distinguish pancreatoblastomas from morphological mimics such as acinar cell carcinomas,solid pseudopapillary neoplasms,and pancreatic neuroendocrine neoplasms.

关键词： Pancreas Adult pancreatoblastoma Pancreatic cancer Solid pancreatic mass Non-ductal pancreatic tumours

A two-phase multiobjective optimization for benchmarking and evaluating service quality in banks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Intelligent Computing and Cybernetics 2018年第4期11卷 446-470页

作者： Femi Emmanuel ayo Department of Computer Science Federal University of AgricultureAbeokutaNigeria

Purpose–Service quality is an evaluation of how well a delivered service meets customers’*** purpose of this paper is to provide a reliable scale of measurement for service quality in ***/methodology/approach–The SERVQUAL model was adopted based on a Banking Service Quality(BSQ)model and a two-phase multiobjective optimization model was designed.A structured questionnaire with five-point Likert scale was administered with a 93 percent response rate of 270 sample size.A total of 22 variables were considered based on the BSQ model and the significance of these variables to customers’satisfaction were *** analysis was used to extract the most influential factors on the measure of service quality and four factors were selected namely:they deliver when promised,precision on account statements,queues that move rapidly and sufficient number of ATMs per *** order to determine the reliability of the multiple Likert questions in the survey,Cronbach’sαwas used indicating a scale reliability of ***,multiple regression analysis was carried out on the selected factors to design an objective function for the design and evaluation of service quality *** model design used for benchmarking was done using multiobjective genetic algorithm in ***,the model evaluation was done in a java interface using multiobjective particle swamp ***–The evaluation results validated the designed model and showed that the factors they deliver when promised and queues that move rapidly are a more reliable scale of measurement for customer’s satisfaction than the factors precision on account statements and sufficient number of ATMs per *** limitations/implications–The implication of the results is that effectiveness and assurance combined with access is a more significant factor for measuring customers’satisfaction than tangibles based on the BSQ ***/value–The introduction of a two-phase o

关键词： SERVQUAL Benchmarking BSQ Multiple regression Genetic algorithm(GA) Particle swamp optimization(PSO)

Short, Medium, and Long-Term Stroke Mortality in Libreville and Associated Factors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neuroscience & Medicine 2024年第1期15卷 39-50页

作者： Grass Aurelle Mambila Matsalou Jennifer Nyangui Mapaga Pupchen M. Gnigone Minka’a Pagbe Michael Chermine Mboumba Mboumba Christian Allognon Mahutondji Aissata Ibrahima Camara Annick A. Nsounda Nelly Diouf Mbourou Michel-Arnaud Saphou-Damon Elsa ayo Bivigou Philomene Kouna Ndouongo Neurology Department University Hospital of Libreville Libreville Gabon Cardiology Department University Hospitalof Libreville Libreville Gabon

Strokes are common around the world and especially in sub-Saharan Africa. They are responsible for severe sequelae and the majority of deaths. In Gabon, no study on stroke mortality has been conducted. Objective: To determine short, medium, long-term mortality and factors associated with long-term stroke mortality. Method: Our study took place in the Neurology Department of the University Hospital Center of Libreville (UHCL). It was a historical cohort study with descriptive and analytical purposes covering the period from June 1 to August 31, 2018 and taking into account hospitalized patients from January 1, 2013 to December 31, 2017. We conducted a comprehensive systematic recruitment of patients with stroke, 18 years old and more, and had been agreed to give information. We included all patients meeting the inclusion criteria. The data was gathered using Epi-Info 7 software. The CHI-2 test was used for the comparison of frequencies and the Student’s test, for comparison of means. Multivariate analysis with logistic regression allowed us to look for factors associated with long-term mortality. A result was statistically significant for a p 0.05 value. Results: At 3 months, 28 patients (18.1%) died, at 6 months thirty-one patients or 20.1% died. At 5 years old, fifty-three patients or 34.4% had died. The factors associated with long-term mortality, if the lost of sight were all alive were tobacco (p = 0.01) and stroke (p = 0.008). If all those who were lost to sight had died, no factor was associated with 5-year mortality. Conclusion: Stroke mortality must not be taken for granted, it can be underestimated because of the large number of lost sight. Measures must be put in place to strengthen post-stroke monitoring. .

关键词： Stroke Mortality Associated Factors Libreville

Evaluation of reduction roasting and magnetic separation for upgrading Mn/Fe ratio of fine ferromanganese

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2013年第4期23卷 529-533页

作者： Makhula Mpho Bada Samson Afolabi ayo School of Chemical and Metallurgical Engineering Faculty of Engineering and the Built Environment University of the Witwatersrand Johannesburg South Africa Department of Mineral Processing Division Johannesburg South Africa Department of Civil and Chemical Engineering University of South Africa College of Science Engineering and Engineering Johannesburg South Africa

Low grade ferromanganese tailing was subjected to different mineralogical techniques,reduction roasting and magnetic separation to establish whether commercially acceptable manganese qualities and high Mn/Fe ratio could be obtained,and also to determine the best processing route for benefciating this *** main manganese mineral within the feed sample is birnessite,with minor amounts of pyrolusite and *** by assay analysis conducted presented a result with a yield of about 35.75%and Mn grade of 27.63% to coarse(à3.35+1 mm)and yield of 20.24% and Mn grade of 27.71% to(à1.18+0.50 mm)***-stage high induced magnetic separations at 16,000 and 11,000 G produces Mn grades with similar grade to that obtained from the ferromanganese feed *** roasting followed by magnetic separation onà1.18+0.50 mm at 1000 G recovered 72.31% Mn with a grade of 58.44% Mn,2.52% Fe and 3.29% Si at Mn/Fe ratio of *** study reveals the influence of roasting in converting the hematite and goethite to magnetite and the response of the roasted fraction to magnetic separation.

关键词： Ferromanganese Mn/Fe ratio Magnetic separation Mineralogy Reduction roasting

Assessing Capacity and Implementation Status of the Disaster Risk Management Strategy for Health and Community Disaster Resilience in Malawi

在线全文

学校读者我要写书评

暂无评论

International Journal of Disaster Risk Science 2021年第5期12卷 673-688页

作者： Ozius Dewa Donald Makoka Olalekan A.ayo-Yusuf Southern Africa Resilience Innovation Lab(SARiLab) School of Health Systems and Public HealthUniversity of PretoriaPretoria 0002GautengSouth Africa Centre for Agricultural Research and Development Lilongwe University of Agriculture and Natural ResourcesLilongweCentral RegionMalawi

Floods are among the most frequently occurring natural hazards in Malawi,often with public health *** mixed methods study assessed the capacity for and implementation status of the disaster risk management(DRM)strategy for the health sector in Malawi,using flooding in the Nsanje District as a *** were collected using desk review and a workshop methodology involving key officials from government ministries,national and international development partners,and the *** results show that Malawi had recently strengthened its DRM institutional frameworks,with a pronounced policy shift from reactive to proactive management of *** sector personnel and structures were key contributors in the design and implementation of DRM activities at all *** partners played a significant role in strengthening DRM coordination and implementation *** of funding and the limited availability,and often fragmented nature,of vulnerability and risk assessment data were identified as key *** human resource capacity and inadequate planning processes at district level impeded full implementation of DRM *** findings call for community-level interventions for improved coordination,planning,and human resource capacity to strengthen community disaster resilience and improve public *** approach used in this study can serve as a model framework for other districts in Malawi,as well as in other low-and middle-income countries in the context of Sendai Framework implementation.

关键词： Community disaster resilience Disaster risk management Health Malawi Policy

Solid pseudopapillary neoplasm of the pancreas

在线全文

学校读者我要写书评

暂无评论

World Journal of Hepatology 2021年第8期13卷 896-903页

作者： ayo O Omiyale Department of Cellular Pathology Imperial College Healthcare NHS TrustCharing Cross HospitalLondon W68RFUnited Kingdom

Solid pseudopapillary neoplasms are *** article reviews the clinical and pathologic features of solid pseudopapillary neoplasm of the pancreas,including the epidemiology,cytology,molecular pathology,differential diagnosis,treatment,and *** pseudopapillary neoplasms are low-grade malignant tumours of the pancreas characterized by poorly cohesive epithelial cells with solid and pseudopapillary *** pseudopapillary neoplasms occur predominantly in young *** solid pseudopapillary neoplasms can occur throughout the pancreas,they arise slightly more frequently in the tail of the *** aetiology is *** rare cases have been reported in the setting of familial adenomatous *** are no symptoms unique to solid pseudopapillary neoplasms,however,the most common symptom is abdominal pain or *** features of solid pseudopapillary neoplasms on computed tomography imaging are indicative of the pathologic changes within the ***,well-demarcated masses with variably solid and cystic ***,these tumours are composed of epithelial cells forming solid and pseudopapillary structures,frequently undergoing haemorrhagic cystic ***,these tumours express nuclear and/or cytoplasmicβ-*** all solid pseudopapillary neoplasms harbour mutations in exon 3 of CTNNB1,the gene encodingβ-*** overall prognosis is excellent,and most patients are cured by complete surgical resection.

关键词： Cancer of pancreas Pancreatic neoplasms Solid pseudopapillary neoplasm of the pancreas Non-ductal pancreatic tumours Pancreas

CA-KSE: a combinatorial algorithm for benchmarking in knowledge sharing environment

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Intelligent Computing and Cybernetics 2019年第1期12卷 2-22页

作者： Femi Emmanuel ayo Olusegun Folorunso Sakinat Oluwabukonla Folorunso Department of Computer Science Federal University of AgricultureAbeokutaNigeria Department of Physical and Computer Sciences McPherson UniversitySeriki SotayoNigeria Department of Computer Science College of Physical SciencesFederal University of AgricultureAbeokutaNigeria Department of Mathematical Sciences Olabisi Onabanjo UniversityAgo IwoyeNigeria

Purpose–Over the past decade,the cost of product development has increased drastically,and this is due to the inability of most enterprises to locate suitable and optimal collaborators for knowledge ***,knowledge sharing is a mechanism that helps people find the best collaborators with relevant ***,a new approach for locating optimal collaborators with relevant knowledge is needed,which couldhelp enterprisein reducingcost andtime ina *** aimsto discuss these ***/methodology/approach–One unique challenge in the domain of knowledge sharing is that collaborators do not possess the same number of events resident in the knowledge available for *** this paper,the authors present a new approach for locating optimal collaborators in knowledge-sharing environment using the combinatorial algorithm(CA-KSE).Findings–The proposed pattern-matching approach implemented in Java is considered efficient for solving the issue peculiar to collaboration in knowledge-sharing *** authors benchmarked the proposed approach with its semi-global pairwise alignment and global alignment counterparts through scores comparison and the receiver operating characteristic *** results obtained from the comparisons showedthat CA-KSEis a perfect test havinganarea undercurveof 0.9659,comparedto the other *** limitations/implications–The paper has proposed an efficient algorithm,which is considered better than related methods,for matching several collaborators(more than two)in KS *** method could be deployed in medical field for gene analysis,software organizations for distributed development and academics for knowledge ***/value–One sign of strength of this approach,compared to most sequence alignment approaches that can only match two collaborators at a time,is that it can match several collaborators at a faster rate.

关键词： Combinatorial algorithm Knowledge sharing(KS) Collaborators Pattern matching,Benchmark score

Changes of water chemistry from rainfall to stream flow in Obagbile Catchment, Southwest Nigeria

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Regional Sustainability 2022年第2期3卷 170-181页

作者： Mojisola Hannah OMOGBEHIN Isaac ayo OLUWATIMILEHIN Department of Geography Obafemi Awolowo UniversityIle Ife220101Nigeria

Water chemistry changes when it flows through different *** study aims to characterize the differences of water(including rainwater,overland flow,soil water,groundwater,and stream water)chemistry of five kinds of water in Obagbile Catchment in Southwest Nigeria,determine the changes in water chemistry that occur as the water moves from one pathway to another,and identify the factors responsible for the water chemistry *** do these,we collected 50 water samples from 10 heavy storms that received equal to or more than 10 mm of rain within an hour to test the changes of water chemical properties across various pathways in this *** results show that overland flow had the highest p H and electrical conductivity(EC)and rainwater had the lowest values of the two ***^(2+),Mg^(2+),Cl^(ˉ),and HCOO^(ˉ) were found to have their highest concentrations in stream water;meanwhile,NO_(3)^(–),NH_(4)^(+),and SO_(4)^(2–) were found to have almost the same low concentrations in all the water samples.K+was only dominant in stream water;while dissolved organic carbon(DOC)was lowest in rainwater,same in overland flow,soil water,and groundwater samples,and highest in stream *** component analysis(PCA)showed that for all the water samples from different pathways,two factors mainly accounted for the total *** two factors were related to the crustal and anthropogenic sources in rainwater,suggesting that the high loadings of major cations(e.g.,Ca^(2+) and Mg^(2+)) in rainwater samples are *** PCA for the overland flow and soil water showed strong correlations among pH,EC,and the concentrations of Na^(+),Mg^(2+),HCOO^(-),and CH_(3)COO^(-),while the high loadings of all the parameters and the strong correlations among each other were evident in the stream *** conclusion,the chemical constituents found in water are also the components of pathways through which the water *** major factors responsible for the change in the

关键词： Water chemistry Rainwater Overland flow Soil water Obagbile Catchment Principal component analysis