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The potential of starch-chitosan blends with poloxamer for the preparation of microparticles by spray-drying

Particuology 2024年第6期89卷 1-10页

作者： Juan enrique Barranco-García Carolina Caicedo enrique Javier Jiménez-Regalado carlos Espinoza-González Graciela Morales Rocio Yaneli Aguirre-Loredo Abril Fonseca-García Tecnológico Nacional de México/Instituto Tecnológico de Oaxaca Departamento de Química y BioquímicaAvenida Ing.Víctor Bravo Ahuja No.125Esquina Calzada Tecnológico68030OaxacaMexico Faculty of Engineering Unidad Central del Valle del Cauca(UCEVA)Carrera 17a 48-144763022TuluáColombia Centro de Investigación en Química Aplicada(CIQA) Blvd.Enrique Reyna Hermosillo 14025294SaltilloCoahuilaMexico Investigadoras por México CONAHCYT-CIQA Av.Insurgentes Sur 1562Col.Crédito Constructor03940Alcaldía Benito JuárezCDMXMexico

Using biopolymers as wall materials in spray drying poses challenges,particularly in attaining flowability and thermal stability among their physicochemical *** paper addresses these challenges by preparing microparticles using a blend of starch–chitosan and a poloxamer,commercially named Pluronic®*** aimed to elucidate the effects of varying poloxamer concentrations on the resulting particles through the spray drying *** with a poloxamer concentration of 3%(w/v)demonstrated a notably higher yield,especially when compared to those with 0%and 1%*** with 3%and 5%(w/v)poloxamer displayed a narrower particle size distribution,with the 3%blend showing a superior yield attributed to arrangements of blend components that improve flowability.X-ray diffraction analysis showcased the characteristic peaks of A-type starch form,with shifts suggesting enhanced interactions between *** with increased poloxamer content showed elevated thermal degradation temperatures,with the 3%blend registering a significant rise,opening avenues for encapsulating heat-sensitive *** study primarily focuses on the preparation and basic characterization of *** underscores the potential of blends with optimal poloxamer concentrations in microencapsulation,emphasizing further research to harness their capabilities thoroughly.

关键词： Biopolymer Starch Chitosan Pluronic®F127 Microparticles Spray drying

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Composition and Molecular Identification of Bacterial Community in Seawater Desalination Plants

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Advances in Microbiology 2019年第10期9卷 863-876页

作者： Pilar Garcia-Jimenez Marina Carrasco-Acosta carlos enrique payá Irina Alemá n Ló pez Juana Rosa Betancort Rodrí guez José Alberto Herrera Meliá n Department of Biology Universidad de Las Palmas de Gran Canaria Campus de Tafira Las Palmas Spain Department of Water Instituto Tecnológico de Canarias Playa de Pozo Izquierdo Las Palmas Spain Department of Chemistry Universidad de Las Palmas de Gran Canaria Campus de Tafira Las Palmas Spain

Biofouling is an important problem for reverse osmosis (RO) membrane manufacturers. Bacteria are mainly involved in generating fouling and obturating RO membranes. Insights into biofilm bacteria composition could help prevent biofouling, reduce the cost of using RO-fouling membranes and guarantee safe water. Culture-dependent and independent techniques were then performed in order to identify bacteria associated with RO membranes. Bacteria cultures described the presence of six pure colonies, four of which were identified through API testing. Based on 16s rRNA gene analysis, a predominant bacterium was identified and annotated as Sphingomonas sp. The 16s rRNA gene clone library, on the other hand, showed that the bacterium, Pseudomonas marincola, accounted for nearly 30% of the clone library, while the rest of bacteria were chimeras (62%) and non-representative species (3%). In conclusion, culture-dependent and independent approaches showed that two dominant bacteria were commonly observed in RO desalination membranes.

关键词： Biofouling Bacteria 16s rRNA Reverse Osmosis Membrane Pseudomonas sp. Sphingomonas sp.

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Mixed neuroendocrine non-neuroendocrine neoplasms in gastroenteropancreatic tract

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World Journal of Gastrointestinal Oncology 2024年第4期16卷 1166-1179页

作者： Sebastián Díaz-López Jerónimo Jiménez-Castro carlos enrique Robles-Barraza carlos Ayala-de Miguel Manuel Chaves-Conde Medical Oncology Department Hospital Universitario ValmeSeville 41014AndalucíaSpain

Mixed neuroendocrine non-neuroendocrine neoplasms(MiNENs)are a hetero-geneous group of malignant neoplasms that can settle in the gastroenteropan-creatic *** are composed of a neuroendocrine(NE)and a non-NE compo-nent in at least 30%of each *** non-NE component can include different histological combinations of glandular,squamous,mucinous and sarcomatoid phenotypes,and one or both of the components can be low-or high grade *** changes in the nomenclature of these neoplasms might lead to great deal of confusion,and the lack of specific clinical trials is the main reason why their management is *** review aims to clarify the definition of MiNEN and analyze available evidence about their diagnosis and treatment options according to their location and extension through careful analysis of the available *** would be important to reach a general consensus on their diagnosis in order to construct a classification that remains stable over time and facilitates the design of clinical trials that,due to their low incidence,will require long recruitment periods.

关键词： Mixed neuroendocrine non-neuroendocrine neoplasms Mixed adenoneuroendocrine carcinomas Mixed tumours Gastroenteropancreatic Treatment Etiology Diagnosis

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Towards an integrated risk analysis security framework according to a systematic analysis of existing proposals

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Frontiers of Computer Science 2024年第3期18卷 199-216页

作者： Antonio SANTOS-OLMO Luis enrique SÁNCHEZ David G.ROSADO Manuel A.SERRANO carlos BLANCO Haralambos MOURATIDIS Eduardo FERNÁNDEZ-MEDINA GSyA Research Group University of Castilla-La ManchaCiudad Real 13071Spain Institute for Analytics and Data Science University of EssexColchester CO43SQUK Alarcos Research Group University of Castilla-La ManchaCiudad Real 13071Spain ISTR Research group Department of Computer Science and ElectronicsUniversity of CantabriaSantander 39005Spain

The information society depends increasingly on risk assessment and management systems as means to adequately protect its key information *** availability of these systems is now vital for the protection and evolution of ***,several factors have led to an increasing need for more accurate risk analysis *** are:the speed at which technologies evolve,their global impact and the growing requirement for companies to *** analysis processes must consequently adapt to these new circumstances and new technological *** objective of this paper is,therefore,to present the results of an exhaustive analysis of the techniques and methods offered by the scientific community with the aim of identifying their main weaknesses and providing a new risk assessment and management *** analysis was carried out using the systematic review protocol and found that these proposals do not fully meet these new *** paper also presents a summary of MARISMA,the risk analysis and management framework designed by our research *** basis of our framework is the main existing risk standards and proposals,and it seeks to address the weaknesses found in these *** is in a process of continuous improvement,as is being applied by customers in several European and American *** consists of a risk data management module,a methodology for its systematic application and a tool that automates the process.

关键词： information security management security system security risk assessment and management

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Metal-modulated epitaxy of Mg-doped Al_(0.80)In_(0.20)N-based layer for application as the electron blocking layer in deep ultraviolet light-emitting diodes

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Journal of Semiconductors 2024年第5期45卷 80-89页

作者： Horacio Irán Solís-Cisneros carlos Alberto Hernández-Gutiérrez enrique Campos-González Máximo López-López Optomechatronics Group Tecnológico Nacional de México Campus Tuxtla Gutiérrezcarretera Panamericana 1080C.P.29050Tuxtla GutiérrezChiapasMéxico Departamento de Física Instituto Nacional de Investigaciones NuclearesCarretera México-Toluca s/nC.P.52750La Marquesa OcoyoacacMéxico Departamento de Física Centro de Investigación y estudios Avanzados del Instituto Politécnico NacionalAv.Instituto Politécnico Nacional 2508San Pedro ZacatencoGustavo A.Madero07360 Ciudad de MéxicoCDMXMéxico

This work reports the growth and characterization of p-AlInN layers doped with Mg by plasma-assisted molecular beam epitaxy(PAMBE).AlInN was grown with an Al molar fraction of 0.80 by metal-modulated epitaxy(MME)with a thickness of 180 nm on Si(111)substrates using AlN as buffer *** substrate temperatures were used to enhance the incorporation of indium atoms into the alloy without clustering,as confirmed by X-ray diffraction(XRD).Cathodoluminescence measurements revealed ultraviolet(UV)range ***,Hall effect measurements indicated a maximum hole mobility of 146 cm^(2)/(V∙s),corresponding to a free hole concentration of 1.23×10^(19)cm^(−3).The samples were analyzed by X-ray photoelectron spectroscopy(XPS)estimating the alloy composition and extracting the Fermi level by valence band ***-doped AlInN layers were studied for use as the electron-blocking layer(EBL)in LED *** varied the Al composition in the EBL from 0.84 to 0.96 molar fraction to assess its theoretical effects on electroluminescence,carrier concentration,and electric field,using SILVACO *** results from this study highlight the importance and capability of producing high-quality Mg-doped p-AlInN layers through *** simulations suggest that an Al content of 0.86 is optimal for achieving desired outcomes in electroluminescence,carrier concentration,and electric field.

关键词： metal-modulated epitaxy AlInN DUV-LED EBL simulation

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Optical magnetic field enhancement using ultrafast azimuthally polarized laser beams and tailored metallic nanoantennas

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Photonics Research 2024年第5期12卷 1078-1092页

作者： RODRIGO MARTIN-HERNANDEZ LORENZ GRUNEWALD LUIS SANCHEZ-TEJERINA LUIS PLAJA enriqueCONEJERO JARQUE carlos HERNANDEZ-GARCIA SEBASTIAN MAI Grupo de Investigacion en Aplicaciones del Laser y Fotonica Departamento de Fisica AplicadaUniversidad de SalamancaE-37008 SalamancaSpain Unidad de Excelencia en Luz y Materia Estructuradas(LUMES) Universidad de SalamancaE-37008 SalamancaSpain Institute of Theoretical Chemistry Faculty of ChemistryUniversity of Vienna1090 ViennaAustria Vienna Doctoral School in Chemistry(DoSChem) Faculty of ChemistryUniversity of Vienna1090 ViennaAustria Departamento de Electricidad y Electrónica Universidad de Valladolid47011 ValladolidSpain

*** *** thank Valentina Shumakova,Elizaveta Gangrskaia,Alessandra Bellissimo,Audrius Pugzlys,and Andrius Baltu?ka for fruitful discussions and computational support by the Vienna Scientific Cluster(VSC 4).The authors thankfully acknowledge the computer resources at MareNostrum and SCAYLE,and the technical support provided by Barcelona Supercomputing Center(RES-FI-2022-3-0041).R.M.-H.,L.S.-T.,L.P.,E.C.J.,and C.H.-*** funding from the European Research Council(ERC)under the European Union’s Horizon 2020 research and innovation program(Grant Agreement No.851201)and support from Ministerio de Ciencia e Innovación(PID2022-142340NB-I00,PID2019-106910GB-I00).This research was funded in whole or in part by the Austrian Science Fund(FWF)(10.55776/ZK91).For open access purposes,the author has applied a CC BY public copyright license to any author accepted manuscript version arising from this submission.

关键词： metallic polarized discussions

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The versatility of Fe(Ⅱ) in the synthesis of uniform citrate-stabilized plasmonic nanoparticles with tunable size at room temperature

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Nano Research 2020年第9期13卷 2351-2355页

作者： carlos Fernández-Lodeiro Javier Fernández-Lodeiro enrique Carbó-Argibay carlos Lodeiro Jorge Pérez-Juste Isabel Pastoriza-Santos CINBIO Universidade de VigoCampus universitario LagoasMarcosende36310 VigoSpain Galicia Sur Health Research Institute(IIS Galicia Sur) SERGAS-UVIGO36312 VigoSpain BIOSCOPE Group LAQV@REQUIMTEChemistry DepartmentNOVA School of Science and TechnologyNOVA University LisbonCaparica Campus2829-516 CaparicaPortugal PROTEOMASS Scientific Society Rua dos InventoresMadam ParqueCaparica Campus2829-516 CaparicaPortugal International Iberian Nanotechnology Laboratory(INL) Av.Mestre Jose Veiga s/n4715-330 BragaPortugal

A highly versatile seed-mediated approach for the synthesis of citrate-stabilized gold,silver and palladium nanoparticles(NPs)with size control is *** use of iron(Ⅱ)as a reducing agent enables the fabrication of monodisperse NPs in a wide range of sizes(from 15 nm to at least 120 nm(90 nm for Pd))at room *** citrate as capping ligand on the NPs surface facilitates its further surface modification with proteins and thiolated molecules.

关键词： plasmonic nanoparticles gold silver palladium citrate-stabilized Fe(Ⅱ)

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Variations of OCT measurements corrected for the magnification effect according to axial length and refractive error in children

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Journal of Innovative Optical Health Sciences 2018年第1期11卷 123-137页

作者： Inmaculada Bueno-Gimeno enrique España-Gregori Andres Gene-Sampedro Juan carlos Ondategui-Parra carlos J.Zapata-Rodriguez Department of Optics and Optometry and Vision Science University of Valencia Spain Department of Surgery University of Valencia University Hospital La FeSpain Faculty of Optics and Optometry University Vision Centre Polytechnic University of CataloniaSpain

Purpose:The aim of this paper was to examine the distribution of macular,retinal nerve fiber layer(RNFL)thickness and optic disc parameters of myopic and hyperopic eyes in comparison withemmetropic control eyes and to investigate their variation according to axial length(AL)andspherical equivalent(SE)in healthy ***:This study included 293 pairs of eyes of 293children(145 boys and 148 girks),ranging in age from 6 to 17 years,Subjects were dividedaccording to SE in control(emmetropia,99 children),myopia(100 children)and hyperopia(94children)groups and according to axial AL in 68 short(25.00 mm,36).Macular parameters,RNFL thickness and opticdisc morphology were assessed by the Cirrus^(TM) *** was measured using the ***'s formula was used for calculating the corrected AL-related ocular *** Mean age(±SD)was 10.84±3.05 years;mean(±SD)SE was+0.14±0.51 D(range from8.75 to+8.25 D)and mean AL(±SD)was 23.12±*** RNFL thickness,averagemacular thickness and macular volume decreased as AL and myopia *** correlationsbetween AL/SE and optic disc parameters were found after correcting for magnification ***:AL and refractive error affect measurements of macular and RNFL thickness inhealthy *** make a correct interpretation of ocT measurements,ocular magnificationeffect should be taken into account by clinicians or OCT manufacturers.

关键词： Axial length refractive error children OCT measurements magnification fect

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Nature and evolution of the lower crust under central Spain:Inferences from granulite xenoliths(Calatrava Volcanic Field-Spanish central system)

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Geoscience Frontiers 2023年第3期14卷 10-32页

作者： David Orejana carlos Villaseca Marlina A.Elburg enrique Merino-Martínez Javier García Serrano Departamento de Mineralogía y Petrología Universidad Complutense de MadridSpain Departamento de Dinámica Terrestre y Observación de la Tierra Instituto de Geociencias IGEO(UCMCSIC)MadridSpain Department of Geology University of JohannesburgSouth Africa Instituto Geológico y Minero de España–Consejo Superior de Investigaciones Científicas CN IGME–CSIC

So far,the nature and evolution of the lower crust under central Spain have been constrained mainly on the basis of a heterogeneous suite of granulite xenoliths from the Spanish Central System(SCS).In recent years,ultramafic volcanics from the Calatrava Volcanic Field(CVF)have also provided deep-seated crustal xenoliths which have not been studied in *** data,combining mineral,whole-rock and isotopic geochemistry with U–Pb–Hf isotope ratios in zircons from the CVF and SCS xenoliths,highlight the felsic composition of the lower crust under central Iberia.A number of the Calatrava xenoliths represents Variscan igneous protoliths,which are a minor population in the SCS,and were likely formed by crystallisation of intermediate and felsic melts in the lower crust during the Variscan orogeny(leucodiorite protolith age of 314±3 Ma and leucogranite protolith age of 308±2.5 Ma).U–Pb data of metamorphic zircons show that granulite-facies metamorphism mainly occurred from 299 to 285 Ma in both *** ages are slightly younger than those of granitic intrusions that could be genetically related to the granulitic residue,which points to a main role of U–Pb isotope resetting in lower crustal zircons during HT or UHT *** zircon U–Pb–Hf isotopic ratios support the idea that the lower crust in central Iberia consists mainly of Ordovician–Neoproterozoic metaigneous and metasedimentary rocks associated with the Cadomian continental arc of northern *** rocks provide evidence of mixing between juvenile magmas and an enriched crustal component,ultimately extracted from an Eburnean *** more evolved components present in detrital zircons are likely related to recycling of Archean crust derived from North Africa cratonic terranes.

关键词： Granulite xenoliths U-Pb geochronology Lu-Hf isotopes Calatrava Volcanic Field Spanish central system

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Symptomatic accommodative and binocular dysfunctions from the use of flat-panel displays

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International Journal of Ophthalmology(English edition) 2018年第3期11卷 501-505页

作者： Esteban Porcar Juan carlos Montalt Alvaro M. Pons enrique Espana-Gregor Department of Optics Optometry and Vision Sciences Physics College University of Valencia Burjassot (Valencia) 46100 Spain Department of Surgery Ophthalmology Unit Faculty of Medicine and Odontology la Fe University and Polytechnic Hospital Valencia 46026 Spain

AIM： To determine the presence of symptomatic accommodative and non-strabismic binocular dysfunctions （***） in a non-presbyopic population of video display unit （VDU） users with flat-panel displays. METHODS： One hundred and one VDU users, aged between 20 to 34y, initially participated in the study. This study excluded contact-lens wearers and subjects who had undergone refractive surgery or had any systemic or ocular disease. First, subjects were asked about the type and nature of eye symptoms they experienced during VDU use. Then, a thorough eye examination excluded those subjects with a significant uncorrected refractive error or other problem, such as ocular motility disorders, vertical deviation, strabismus and eye diseases. Finally, the remaining participants underwent an exhaustive assessment of their accommodative and binocular vision status. RESULTS： Eighty-nine VDU users （46 females and 43 males） were included in this study. They used flat-panel displays for an average of 5±1.9h a day. Twenty subjects presented *** （22.5%）. Convergence excess was the most frequent non-strabismic binocular dysfunction （9 subjects）, followed by fusional vergence dysfunction （3 subjects） and convergence insufficiency （2 subjects）. Within the accommodative dysfunctions, accommodative excess was the most common （4 subjects）, followed by accommodative insufficiency （2 subjects）. Moderate to severe eye symptoms were found in 13 subjects with ANSBD. CONCLUSION： Significant eye symptoms in VDU users with accommodative and/or non-strabismic binocular dysfunctions often occur and should not be underestimated; therefore, an appropriate evaluation of accommodative and binocular vision status is more important for this population,

关键词： general binocular dysfunctions accommodativedysfunctions non-strabismic binocular dysfunctions eyesymptoms video display unit

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