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The Association between Researchers’Conceptions of Research and Their Strategic Research Agendas

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Journal of Data and Information Science 2020年第4期5卷 56-74页

作者： João m.santos Hugo Horta Instituto Universitário de Lisboa(ISCTE-IUL) Centro de Investigação e Intervenção Social(CIS-IUL)LisbonPortugal Social Contexts and Policies of Education Faculty of EducationThe University of Hong KongHong Kong SARChina

Purpose:In studies of the research process,the association between how researchers conceptualize research and their strategic research agendas has been largely *** study aims to address this ***/methodology/approach:This study analyzes this relationship using a dataset of more than 8,500 researchers across all scientific fields and the *** studies the associations between the dimensions of two inventories:the Conceptions of Research Inventory(CoRI)and the multi-Dimensional Research Agenda Inventory—Revised(mDRAI-R).Findings:The findings show a relatively strong association between researchers’conceptions of research and their research *** all conceptions of research are positively related to scientific ambition,the findings are mixed regarding how the dimensions of the two inventories relate to one another,which is significant for those seeking to understand the knowledge production process *** limitations:The study relies on self-reported data,which always carries a risk of response *** implications:The findings provide a greater understanding of the inner workings of knowledge processes and indicate that the two inventories,whether used individually or in combination,may provide complementary analytical perspectives to research performance *** may thus offer important insights for managers of research environments regarding how to assess the research culture,beliefs,and conceptualizations of individual researchers and research teams when designing strategies to promote specific institutional research focuses and ***/value:To the best of the authors’knowledge,this is the first study to associate research agendas and conceptions of *** is based on a large sample of researchers working worldwide and in all fields of knowledge,which ensures that the findings have a reasonable degree of generalizability to the global population of researchers.

关键词： Conception of research Research agendas Researchers’beliefs Research strategy Views of research Research processes

methanol oxidation in acidic and alkaline electrolytes using PtRuIn/C electrocatalysts prepared by borohydride reduction process

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燃料化学学报 2018年第12期46卷 1462-1471页

作者： santos m.C.L. Nandenha J. Ayoub J.m.S. Assumpao m.H.m.T. Neto A.O. Instituto de Pesquisas Energéticas e Nucleares IPEN/CNEN-SPAv.Prof.Lineu Prestes2242 Cidade UniversitáriaCEP 05508-000Sao PauloSPBrazil Universidade Federal de Sao Carlos UFSCar Campus Lagoa do Sino Rodovia Lauri Simoes de Barros Km 12 CEP 18290-000-Buri-Sao Paulo SP Brazil

PtRuIn/C electrocatalysts( 20% metal loading by weight) were prepared by sodium borohydride reduction process using H_2PtCl6·6H_2O,RuCl_3·xH_2O and InCl_3·xH_2O as metal sources,borohydride as reducing agent and Carbon Vulcan XC72 as support. The synthetized PtRuIn/C electrocatalysts were characterized by X-ray diffraction( XRD),energy dispersive analysis( EDX),transmission electron microscopy( TEm),cyclic voltammetry( CV),chronoamperommetry( CA) and polarization curves in alkaline and acidic electrolytes( single cell experiments). The XRD patterns showPtpeaks are attributed to the face-centered cubic( fcc) structure,and a shift of Pt( fcc) peaks indicates that Ru or In is incorporated into Ptlattice. TEmmicrographs showmetal nanoparticles with an average nanoparticle size between 2.7 and 3.5 nm. methanol oxidation in acidic and alkaline electrolytes was investigated at room temperature,by CV and CA. PtRu/C( 50 ∶ 50) shows the highest activity among all electrocatalysts in study considering methanol oxidation for acidic and alkaline electrolyte. Polarization curves at 80 ℃ showPtRuIn/C( 50 ∶ 25 ∶ 25)with superior performance for methanol oxidation,when compared to Pt/C,PtIn/C and PtRu/C for both electrolytes. The best performance obtained by PtRuIn/C( 50 ∶ 25 ∶ 25) in real conditions could be associated with the increased kinetics reaction and/or with the occurrence simultaneously of the bifunctional mechanism and electronic effect resulting from the presence of Ptalloy.

关键词： borohydride reduction process PtRuIn/C electrocatalysts methanol oxidation acidic and alkaline electrolytes polarization curves

Novel nanocomposites based on a strawberry-like gold-coated magnetite （Fe@Au） for protein separation in multiple myeloma serum samples

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Nano Research 2015年第4期8卷 1189-1198页

作者： Jose E. Araujo Carlos Lodeiro Jose L. Capelo Benito Rodrfguez-Gonzalez Alcindo A. dos santos~ Hugo m. santos Javier Ferna.ndez-Lodeiro BIOSCOPE Research Group UCIBIO-REQUIMTE Department of Chemistry Faculty of Science and Technology University NOVA of Lisbon 2829-516 Caparica Portugal PROTEOmASS Scientific Society Madan Parque Rua dos Inventores 2825-182 Caparica Portuga Scientific and Technological Research Assistance Centre (CACTI) University of Vigo Vigo Spain Instituto de Quimica Universidade de Sao Paulo Av. Prof. Lineu Prestes 748 CxP 26077 Sao Paulo 05508-000 Brazil

A new process to produce magnetite partially coated with strawberry-like gold nanoparticles in aqueous media is reported. The fast response to magnetic fields and optical properties of gold nanoparticle-based colloidal systems are the two main advantages of this new Fe@Au nanomaterial. These advantages allow for the use of this new colloidal nanomaterial for various purposes in proteomics and biomedicine, as proteins can bind to the surface, and the surface can also be funcfionalized. As proof-of-concept, the new Fe@Au nanoparticles have been assessed in biomarker discovery as a tool for pre-concentration and separation of proteins from complex proteomes. To this end, sera from healthy people were compared with sera from patients diagnosed with multiple myeloma. The application of this new Fe@Au nanomaterial combined with mass spectrometry has allowed for the identification of 53 proteins, and it has also shown that the heat shock protein HSP75 and the plasma protease C1 inhibitor are potential biomarkers for diagnostics and control of multilvle mveloma vro^ression.

关键词： nanoproteomics strawberry-nanopartides multifunctional hybridnanoparticles biomarkers multiple myeloma

Rationally designed synthesis of bright AgInS2/ZnS quantum dots with emission control

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Nano Research 2020年第9期13卷 2438-2450页

作者： Jose X.Soares K.David Wegner David S.m.Ribeiro Armindo melo Ines Hausler Joao L.m.santos Ute Resch-Genger LAQV-REQUImTE Department of Chemical SciencesLaboratory of Applied ChemistryFaculty of PharmacyUniversity of PortoRua de Jorge Viterboferreira228Porto4050-313Portugal Federal Institute for materials Research and Testing(BAm) Division BiophotonicsRichard-Willstaetter-Strasse 1112489 BerlinGermany LAQV-REQUImTE Laboratorio de Bromatologia e HidrologiaDepartamento de Ciencias QutmicasFaculdade de Farmacia da Universidade do PortoRua de Jorge Viterboferreira228Porto4050-313Portugal Technische Universitat Berlin Institutfiir Optik und Atomare PhysikStrafie des 17.Juni 13510623 BerlinGermany

In the blossoming field of Cd-free semiconductor quantum dots(QDs),ternary Ⅰ-Ⅲ-VI QDs have received increasing attention due to the ease of the environmentally friendly synthesis of high-quality materials in water,their high photoluminescence(PL)quantum yields(QYs)in the red and near infrared(NIR)region,and their inherently low ***,their oxygen-insensitive long PL lifetimes of up to several hundreds of nanoseconds close a gap for applications exploiting the compound-specific parameter PL *** overcome the lack of reproducible synthetic methodologies and to enable a design-based control of their PL properties,we assessed and modelled the synthesis of high-quality mPA-capped AglnS2/ZnS(AlS/ZnS)*** refined parameters included reaction time,temperature,Ag:In ratio,S:In ratio,Zn:In ratio,mPA:ln ratio,and pH using a design-of-experiment *** for the optimization was provided by mathematical models developed for the application-relevant PL parameters,maximum PL wavelength,QY,and PL lifetime as well as the elemental composition in terms of Ag:ln:Zn *** these experimental data-based models,mPA:ln and Ag:ln ratios and pH values were identified as the most important synthesis parameters for PL control and an insight into the connection of these parameters could be ***,the experimental conditions to synthetize QDs with tunable emission and high QY were *** excellent agreement between the predicted and experimentally found PL features confirmed the reliability of our methodology for the rational design of high quality AlS/ZnS QDs with defined PL *** approach can be straightforwardly extended to other ternary and quaternary QDs and to doped QDs.

关键词： quantum dot core/shell nanoparticle silver indium sulfide microw ave-assisted synthesis design of experim ent photoluminescence

Discrepancies between the responses to skin prick test to food and respiratory antigens in two subtypes of patients with irritable bowel syndrome

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World Journal of Gastroenterology 2008年第19期14卷 3044-3048页

作者： Rosa LS Soares Hamilton N Figueiredo Jose m santos Rita F Oliveira Raquel L Godoy Felipe AP mendona Internal medicine Department Faculty of Medicine-Federal Fluminense University Internal medicine Department Faculty of MedicineFederal Fluminense University medical school of Universitary Hospital Antonio Pedro Federal Fluminense University medical school of Faculty of medicine Federal Fluminense University

AIm:To compare the response to skin prick tests (SPTs) to food antigens (FAs) and inhalant allergens (IAs) in patients with two subtypes of irritable bowel syndrome (IBS) and healthy controls. mETHODS:We compared the results of SPTs for IAs and FAs in 87 volunteers divided into three groups:diarrhea predominant IBS (D-IBS) GroupⅠ(n = 19), constipation predominant IBS (C-IBS) Group Ⅱ (n = 17), and normal controls Group Ⅲ (n = 51). RESULTS:Of the 285 tests (171 for FAs and 114 for IAs) performed in GroupⅠwe obtained 45 (26.3%) positive responses for FA and 23 (20.1%) for IA. Of the 153 tests for FA in Group Ⅱ, we obtained 66 (20.1%) positive responses, and of the 102 tests for IA, we obtained 20 (19.6%) positive responses. Of the 459 tests for FA performed in Group Ⅲ, we obtained 39 (84%) positive responses, and of the 306 for IA, we obtained 52 (16.9%) positive responses. The numbers of positive responses were not significantly different between the three groups, but in the D-IBS group, the number of SPTFA responses differed significantly from those for the other two groups (P mall number of cases studied, the higher reactivity to FAs in GroupⅠcompared to Groups Ⅱ and Ⅲ adds new information, and suggests the presence of a possible alteration in intestinal epithelial function.

关键词： Atopy Constipation Diarrhea Foodintolerance Irritable bowel syndrome Skin prick test

Test-Retest Reliability of Functional magnetic Resonance Imaging Activation for a Vergence Eye movement Task

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Neuroscience Bulletin 2020年第5期36卷 506-518页

作者： Cristian morales Suril Gohel Xiaobo Li mitchell Scheiman Bharat B.Biswal Elio m.santos Chang Yaramothu Tara L.Alvarez Biomedical Engineering New Jersey Institute of TechnologyNewarkNJ 07102USA Pennsylvania College of Optometry Salus UniversityPhiladelphiaPA 19027USA Department of Health Informatics Rutgers University School of Health ProfessionsNewarkNJ 07107USA

Vergence eye movements are the inward and outward rotation of the eyes responsible for binocular *** studies have mapped and investigated the neural substrates of vergence,it is not well understood whether vergence eye movements evoke the blood oxygen level-dependent signal reliably in separate experimental *** test-retest reliability of stimulus-induced vergence eye movement tasks during a functional magnetic resonance imaging(fmRI)experiment is important for future randomized clinical trials(RCTs).In this study,we established region of interest(ROI)masks for the vergence neural ***-seven binocularly normal young adults participated in two functional imaging sessions measured on different days on the same 3 T Siemens *** fmRI experiments used a block design of sustained visual fixation and rest blocks interleaved between task blocks that stimulated eight or four vergence eye *** test-retest reliability of task-activation was assessed using the intraclass correlation coefficient(ICC),and that of spatial extent was assessed using the Dice *** activation during the vergence eye movement task of eight movements compared to rest was repeatable within the primary visual cortex(ICC=0.8),parietal eye fields(ICC=0.6),supplementary eye field(ICC=0.5),frontal eye fields(ICC=0.5),and oculomotor vermis(ICC=0.6).The results demonstrate significant test-retest reliability in the ROIs of the vergence neural substrates for functional activation magnitude and spatial extent using the stimulus protocol of a task block stimulating eight vergence eye movements compared to sustained *** ROIs can be used in future longitudinal RCTs to study patient populations with vergence dysfunctions.

关键词： Vergence eye movement Test-retest reliability Functional mRI Vergence region of interest masks

Tree succession across a seasonally dry tropical forest and forest-savanna ecotone in northern minas Gerais,Brazil

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Journal of Plant Ecology 2017年第5期10卷 859-868页

作者： Polyanne A.Coelho Paola Ferreira santos Eduardo de Paiva Paula Deborah m.G.Apgaua Bruno Gini madeira Gisele Cristina de Oliveira menino Yule Roberta Ferreira Nunes Rubens m.santos David Y.P.Tng Department of Forest Sciences Federal University of LavrasC.P.3037CEP 37200-000LavrasMinas GeraisBrazil Department of General Biology State University of Montes ClarosC.P.126CEP 39401-089Montes ClarosMinas GeraisBrazil Instituto Federal Goiano C.P.66CEP 75901-970Rio VerdeGoiâniaBrazil Centre for Tropical Environmental and Sustainability Sciences College of Marine and Environmental SciencesJames Cook University14-88 McGregor RdSmithfield QLD 4878CairnsQueenslandAustralia

Aims Understanding succession in tropical forest is an important aspect of vegetation science,but to date,successional processes in sea-sonally dry tropical forests(SDtFs)have received much less atten-tion than evergreen humid tropical *** aim to fill this knowledge *** We investigated vegetation succession in SDtF areas consisting of three different successional stages(early,intermediate,late),and a SDtF-savanna ecotone in the municipal district of Juramento,north of minas Gerais State,*** twelve 400 m2 plots in each area,we compared vegetation parameters and structural variables(absolute density and basal area)and examined the floristic composition of the tree component to find gradients of *** Findings We found evidence of species turnover along a successional gradi-ent,with the intermediate stage showing the highest species rich-ness and *** was accompanied with a significant increase in the number of tree individuals and basal area from the early to intermediate successional ***,the intermediate and late SDtF successional stages were more similar in structure and *** ecotone was the most species rich and was similar to the intermediate SDtF and early successional stage in species richness and floristic composition *** results will have implications for guiding SDtF management and recovery programs.

关键词： caatinga floristic Similarity ecotone forest succession resilience.

A critical review towards the causes of the iron-based catalysts deactivation mechanisms in the selective oxidation of hydrogen sulfide to elemental sulfur from biogas

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Journal of Energy Chemistry 2024年第3期90卷 388-411,I0010页

作者： mostafa Tarek Janaina S.santos Victor márquez mohammad Fereidooni mohammad Yazdanpanah Supareak Praserthdam Piyasan Praserthdam Center of Excellence on Catalysis and Catalytic Reaction Engineering(CECC) Department of Chemical EngineeringFaculty of EngineeringChulalongkorn UniversityBangkok 10330Thailan High-Performance Computing Unit(CECC-HCU) Center of Excellence on Catalysis and Catalytic Reaction Engineering(CECC)Chulalongkorn UniversityBangkok 10330Thailand

Hydrogen sulfide(H_(2)S) not only presents significant environmental concerns but also induces severe corrosion in industrial equipment,even at low *** various technologies,the selective oxidation of hydrogen sulfide(SOH_(2)S) to elemental sulfur(S) has emerged as a sustainable and environmentally friendly *** to its unique properties,iron oxide has been extensively investigated as a catalyst for SOH_(2)S;however,rapid deactivation has remained a significant *** causes of iron oxide-based catalysts deactivation mechanisms in SOH_(2)S,including sulfur or sulfate deposition,the transformation of iron species,sintering and excessive oxygen vacancy formation,and active site loss,are thoroughly examined in this *** focusing on the deactivation mechanisms,this review aims to provide valuable insights into enhancing the stability and efficiency of iron-based catalysts for SOH_(2)S.

关键词： Selective oxidation of H_(2)S Iron-based Catalysts mechanism of deactivation Sulfur or sulfate deposition Transformation of iron species Sintering SDG 7

Complexed amino acid minerals ***-glycinate chelated minerals:Impact on the performance of old laying hens

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Animal Nutrition 2024年第1期16卷 395-408页

作者： marcos J.B.santos maria C.m.m.Ludke Leandro m.Silva Carlos B.V.Rabello mércia R.Barros Fabiano S.Costa Clariana S.santos Jamille S.S.Wanderley Department of Animal Science Rural Federal University of PernambucoRecifePEBrazil Department of Veterinary Science Rural Federal University of PernambucoRecifePEBrazil

The present study was to evaluate the effect of trace minerals(Zn,mn,and Cu)from complexed amino acid minerals(ZmCAA)and bis-glycinate chelated minerals(ZmCGly)in laying hen diets on performance,internal and external egg quality,yolk mineral deposition,intestinal morphometry,and bone *** 78 to 98 weeks of age,400 White LSL-Lite strain laying hens were distributed in a randomized design with 4 treatments with 10 replicates per *** were distributed in a 2×2 factorial arrangement using either Zn,mn,and Cu of ZmCAA or ZmCGly source at 2 levels:low(20,20,and 3.5 mg/kg of Zn,mn,and Cu,respectively)or high(40,40,and 7 mg/kg of Zn,mn,and Cu,respectively).The analysis of variance was performed,and in cases where differences were observed,the means were compared using Tukey?s test(Pmineral supplementation had a significant impact on the performance of laying *** fed ZmCAA had higher egg production(P=0.01),egg weight(P=0.02),egg mass(P=0.01),and lower feed conversion ratio(P=0.05)compared to those fed *** ZmCAA supplementation showed higher albumen height(P=0.01),albumen weight(P=0.01),and eggshell thickness(Pmn(Pmetry(PmCAA *** the small intestine,ZmCAA resulted in longer villi(P=0.02)and shorter crypt depth(P=0.01)in the *** and ileum measurements were influenced by the level and source of trace minerals(PmCAA exhibited superior performance,egg quality,deposition of trace minerals in the egg yolk,and bone density compared to hens fed *** this study,older laying hens supplemented with ZmCAA at lower levels demonstrated adequate levels of supplementation.

关键词： Bis-glycinates metal-amino acids Radiodensity Trace minerals