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Uncertainty and Resolution of Speckle Photography on Micro Samples

Nanomanufacturing and Metrology 2020年第2期3卷 91-104页

作者： gabriela Alexe Andreas Tausendfreund Dirk Stobener Lasse Langstadtler Marius Herrmann Christian Schenck Andreas Fischer Bremen Institute for Metrology Automation and Quality Science(BIMAQ)University of BremenLinzer Str1328359 BremenGermany MAPEX Center for Materials and Processes University of BremenPostbox 33044028359 BremenGermany Bremen Institute for Mechanical Engineering(bime) University of BremenBadgasteiner StraBe 128359 BremenGermany

The efficient development of new materials with defined properties requires fast methods of testing low volumes of material,such as a high-throughput investigation of spherical metallic micro samples with varying compositions and structuring treatments.A classical material testing method for macro samples,the tensile test cannot be employed for analyzing the mechanical properties of spherical samples with diameters below 1 mm since there are currently no methods for holding and stretching them.A combination between the incremental electrohydraulic extrusion as stress actuation unit and the speckle photography as strain measuring method is presented for obtaining the required mechanical *** longitudinal strain is generated at stepwise extrusion through10 μ*** is unknown,whether the speckle strain measuring method is able to provide the necessary low uncertainty for the required resolution in the whole measuring ***,theoretical and experimental investigations of the deformation measurability using the speckle correlation method are presented,showing that local displacements up to 10 μm can be measured with a spatial resolution between 3 and 10μm depending on the displacement *** dominant effect influencing the measurement uncertainty for displacements at this high spatial resolution is the speckle noise,resulting into measurement uncertainties of less than 100 μ***,speckle photography is shown to be applicable for tensile test on micro samples.

关键词： Micro samples Speckle photography Electrohydraulic incremental micro forming

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Enhanced biological wastewater treatment using sodium alginate-immobilized microorganisms in a fluidized bed reactor

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Water Science and Engineering 2022年第2期15卷 125-133页

作者： Yaneth A.Bustos-Terrones Erick R.Bandala gabriela E.Moeller-Chávez Victoria Bustos-Terrones Division of Graduate Studies and Research CONACYT-TecNM-Technological Institute of CuliacánCuliacánSinaloa 80220Mexico Division of Hydrologic Sciences Desert Research InstituteLas VegasNV 89119-7363USA Academic Direction of Environmental Technology Engineering Polytechnic University of the State of MorelosJiutepecMorelos 62550Mexico

In this study,a microbial consortium isolated from an activated sludge tank of a conventional wastewater treatment plant was immobilized using sodium alginate(SA)as a support material for contaminant biodegradation in wastewater.A volume of 500 mL of activated sludge was immobilized in the SA beads(with a mass concentration of 25 g/L).The resulting SA beads were characterized,introduced into a fluidized bed reactor,fed with 1000 mL of the sample,and characterized again after the treatment *** SA-immobilized microorganisms were tested first for degradation of organic matter(expressed as chemical oxygen demand)and total phosphorous in domestic wastewater,achieving removal efficiencies of 71%and 93%,respectively,after 12 ***,the SA-immobilized microorganisms were tested for degradation of a basic blue 9(BB9)textile dye in a condition that simulated textile *** efficiency of the BB9 degradation was found to be as high as 99.5%after 2 *** to these results,SA-immobilized microorganisms were found to be an environmentally friendly and cost-effective alternative for treatment of municipal and industrial wastewater effluents.

关键词： Domestic wastewater Basic blue 9 Immobilized microorganisms Fluidized bed reactor Sodium alginate

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Comparison of grain protein profiles of Brazilian cowpea (Vigna unguiculata) cultivars based on principal component analysis

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Food Production, Processing and Nutrition 2022年第1期4卷 172-182页

作者： Tuany Camila Honaiser gabriela Barbosa Rossi Maurisrael de Moura Rocha Ana Carolina Maisonnave Arisi Food Science and Technology Department CAL CCA UFSCFederal University of Santa CatarinaRod.Admar GonzagaFlorianópolisSanta Catarina134688034-001Brazil Embrapa Meio-Norte Caixa Postal 001TeresinaPiauí64008-780Brazil

This study aims to compare the grain protein profile of four Brazilian cowpea cultivars (BRS Aracê, BRS Itaim, BRS Pajeú, and BRS Xiquexique) by two-dimensional electrophoresis (2-DE) and principal component analysis (PCA). 2-DE efficiently separate cowpea protein profiles, showing high homogeneity among the four cultivars. In addition, the principal component analysis indicated that there is a difference in abundance of proteins among the cultivars. The cultivars BRS Aracê and BRS Xiquexique, both biofortified in iron and zinc, were separated from the cultivars BRS Itaim and BRS Pajeú. These results demonstrate that protein profiles can be used to discriminate cowpea varieties.

关键词： Vigna 2-DE PCA Legumes

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Recombinant canarypox virus expressing the VP2 protein of infectious bursal disease virus induces protection in vaccinated SPF chickens

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Virologica Sinica 2016年第3期31卷 266-269页

作者： Flavia Adriana Zanetti Romina Cardona Carlos Rodolfo Federico Silvina Chimeno-Zoth gabriela Calamante Consejo Nacional de Investigaciones Cientificas y Tecnologicas(CONICET) Rivadavia 1917 (C 1033AAJ) Ciudad Autonoma de Buenos Aires Argentina Instituto de Biotecnologia Centro de Investigaciones en Ciencias Veterinarias y Agronomicas Instituto Nacional de Tecnologia Agropecuaria (INTA) Buenos Aires Argentina

Dear Editor,Infectious bursal disease virus（IBDV）causes infectious bursal disease,a highly contagious immunosuppressive disease that affects young chickens and causes economic losses in the poultry industry *** replicates mainly in actively dividing B lymphocytes within the bursa of Fabricius（BF）,leading to immunosuppression in affected flocks（Mahgoub et al.,2012）.Viral protein 2（VP2）,

关键词： bursal infectious contagious Recombinant expressing immunized vaccines affects vaccination chicken

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Droughts in Homogeneous Areas of South America and Associated Processes during the Months of Austral Spring and Summer

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Advances in Atmospheric Sciences 2024年第12期41卷 2337-2353页

作者： Mariah Sousa GOMES Iracema Fonseca de Albuquerque CAVALCANTI gabriela V.MULLER General Coordination of Earth Science(CGCT) National Institute for Space Research(INPE)Avenida dos Astronautas1758CEP:12227-010Sao Josédos CamposSPBrasil National Scientific and Technical Research Council(CONICET) Argentina -Santa Fe Argentina

Droughts that occurred in selected areas located in homogeneous regions of South America during the austral springs(SON)and summers(DJF)from 1982 to 2019 are identified using the Standard Precipitation Index(SPI).Four areas were analyzed for droughts in SON,and three areas were analyzed for droughts in *** areas in the Amazon suffered from the majority of their droughts during El Niño years,while most of the droughts in the areas of southern Brazil,Uruguay,and North Argentina occurred during La Niña *** southeastern and central-western parts of Brazil,droughts occurred during both phases of El Nino-Southern Oscillation(ENSO)and also during neutral ***,other processes besides ENSO are likely related to the observed *** droughts were investigated for each area and month,and composites of atmospheric and oceanic variables during both seasons were analyzed for the selected *** and large-scale field composites were examined to identify the main processes associated with dry conditions in the different *** features were related to the influence of high pressure over southern and southeastern areas and the divergence of moisture flux in all *** circulations contributed to subsidence over the dry *** large-scale influential features include SST anomalies,wavetrains over the South Pacific Ocean with centers of action over South America that produced subsidence in the study areas,and convection anomalies in the Maritime continent and surrounding ***,the droughts were associated with a combination of regional and large-scale features that produced subsidence over the analyzed regions.

关键词： droughts South America regional features large-scale features

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Numerical Study of a Three-Dimensional H6non Map

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Chinese Physics Letters 2011年第1期28卷 8-11页

作者： gabriela A. Casas Paulo C. Rech Departamento de Ffsica Universidade do Estado de Santa Catarina 89223-100 Joinville Brazil

We consider a three-dimensional generalization of the two-dimensional Henon map. We first investigate the emergence of quasiperiodic states, as a result of Naimark-Sacker bifurcations of period-1 and period-2 orbits. Secondly we investigate the disappearance of the resonance torus in the transition from quasiperiodieity to chaos.

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Taking advantage of the potential of mesenchymal stromal cells in liver regeneration:Cells and extracellular vesicles as therapeutic strategies

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World Journal of Gastroenterology 2018年第23期24卷 2427-2440页

作者： Esteban Juan Fiore Luciana María Domínguez Juan Bayo Mariana gabriela García Guillermo Daniel Mazzolini Laboratory of Gene Therapy Instituto de Investigaciones en Medicina TraslacionalCONICET-Universidad Austral

Cell-based therapies for acute and chronic liver diseases are under continuous progress. Mesenchymal stem/stromal cells(MSCs) are multipotent cells able to migrate selectively to damaged tissue and contribute to its healing and regeneration. The MSC pro-regenerative effect occurs due to their immunomodulatory capacity and their ability to produce factors that promote cell protection and survival. Likewise,it has been observed that part of their paracrine effect is mediated by MSC-derived extracellular vesicles(EVs). EVs contain proteins,lipids and nucleic acids(DNA,m RNA,mi RNA,lnc RNA) from the cell of origin,allowing for intercellular communication. Recently,different studies have demonstrated that MSC-derived EVs could reproduce,at least in part,the biological effects obtained by MSCbased therapies. Moreover,due to EVs' stability for long periods of time and easy isolation methods they have become a therapeutic option to MSCs treatments. This review summarizes the latest results achieved in clinical trials using MSCs as cell therapy for liver regeneration,the role of EVs in liver physiopathology and the potential of MSC-derived EVs as intercellular mediators and therapeutic tools in liver diseases.

关键词： Mesenchymal stem cells Extracellular vesicles Cirrhosis Liver Acute damage Regeneration

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Use of graphs to assess well safety in drilling projects and during operations by identification of available barrier elements and consolidation of barrier envelopes

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Petroleum Research 2024年第3期9卷 418-431页

作者： Nelson Choueri Jr Marcelo Anunciacao Jaculli Amanda gabriela Aparecida Silva Leite JoséRicardo Pelaquim Mendes University of Campinas Brazil

Two independent barrier envelopes are the usual requirement used in most well operations to avoid catastrophic *** are classified as primary-concerning preventing the occurrence of a kick,and secondary-concerning controlling the kick to avoid a *** envelopes consist of barrier elements,thus verifying the quality of these elements is *** elements may be either redundant or mandatory,and these relationships are what constitute the barrier *** this work,we present a methodology to evaluate well safety by identifying existing barrier elements and barrier envelopes and mapping their relationships through the usage of graphs *** technique explicitly states the relationship between barriers and between them and *** enables a simpler visualization for well designers and allows the development of computer programs to control the safety and integrity of wells,both in the design phase and during drilling.12 graphs are provided for a 4-phase well(conductor,surface,production,and drill-in),considering both the primary and secondary *** for constructing each graph is thoroughly *** these graphs are used,reliability values can then be assigned to each barrier element,which results in the reliability of entire barrier *** can be further extended to analyze the safety of each operation by applying the system to operational sequences and even comparing well designs.

关键词： Barrier elements Barrier envelopes Well design Well safety Graphs technique

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THz plasmonics and electronics in germanene nanostrips

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Journal of Semiconductors 2023年第10期44卷 37-49页

作者： Talia Tene Marco Guevara gabriela Tubon-Usca Oswaldo Villacrés Cáceres Gabriel Moreano Cristian Vacacela Gomez Stefano Bellucci Department of Chemistry Universidad Técnica Particular de Loja110160 LojaEcuador UNICARIBE Research Center University of CalabriaI-87036 RendeCSItaly Grupo de Investigación en Materiales Avanzados(GIMA) Facultad de CienciasEscuela Superior Politécnica de Chimborazo(ESPOCH)RiobambaEcuador Facultad de Ciencias Escuela Superior Politécnica de Chimborazo(ESPOCH)RiobambaEcuador Faculty of Mechanical Engineering Escuela Superior Politécnica de Chimborazo(ESPOCH)Riobamba 060155Ecuador INFN-Laboratori Nazionali di Frascati Via E.Fermi 54I-00044 FrascatiItaly

Germanene nanostrips(GeNSs)have garnered significant attention in modern semiconductor technology due to their exceptional physical characteristics,positioning them as promising candidates for a wide range of *** exhibit a two-dimensional(buckled)honeycomb-like lattice,which is similar to germanene but with controllable *** modeling of GeNSs is essential for developing appropriate synthesis methods as it enables understanding and controlling the growth process of these ***,one can adjust the strip width,which in turn can tune the bandgap and plasmonic response of the material to meet specific device *** this study,the objective is to investigate the electronic behav-ior and THz plasmon features of GeNSs(≥100 nm wide).A semi-analytical model based on the charge-carrier velocity of free-standing germanene is utilized for this *** charge-carrier velocity of freestanding germanene is determined through the GW approximation(V_(F)=0.702×10^(6)m·s^(−1)).Within the width range of 100 to 500 nm,GeNSs exhibit narrow bandgaps,typi-cally measuring only a few ***,upon analysis,it was found that the bandgaps of the investigated GeNSs ranged between 29 and 6 *** well,these nanostrips exhibit√q-like plasmon dispersions,with their connected plasmonic fre-quency(≤30 THz)capable of being manipulated by varying parameters such as strip width,excitation plasmon angle,and sam-ple *** manipulations can lead to frequency variations,either increasing or decreasing,as well as shifts towards larger momentum *** outcomes of our study serve as a foundational motivation for future experiments,and further con-firmation is needed to validate the reported results.

关键词： nanostrips carrier velocity germanene plasmonics electronics

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Coronavirus disease-2019 and the intestinal tract:An overview

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World Journal of Gastroenterology 2021年第13期27卷 1255-1266页

作者： gabriela Gama Freire Alberca Rosa Liliana Solis-Castro Maria Edith Solis-Castro Ricardo Wesley Alberca Department of Microbiology Institute of Biomedical Sciences-University of São PauloSão Paulo 05508-000Brazil Departamento Académico de Biología Bioquímica Facultad de Ciencias de la SaludUniversidad Nacional de TumbesPampa Grande 24000TumbesPeru Departamento Académico de Medicina Humana Facultad de Ciencias de la SaludUniversidad Nacional de TumbesPampa Grande 24000TumbesPeru Laboratorio de Dermatologia e Imunodeficiencias(LIM-56) Departamento de DermatologiaFaculdade de Medicina FMUSPUniversidade de São PauloSão Paulo 01246-903Brazil

Severe acute respiratory syndrome coronavirus-2(SARS-CoV-2) infection can progress to a severe respiratory and systemic disease named coronavirus disease–2019(COVID-19). The most common symptoms are fever and respiratory discomfort. Nevertheless, gastrointestinal infections have been reported, with symptoms such as diarrhea, nausea, vomiting, abdominal pain, and lack of appetite. Importantly, SARS-CoV-2 can remain positive in fecal samples after nasopharyngeal clearance. After gastrointestinal SARS-CoV-2 infection and other viral gastrointestinal infections, some patients may develop alterations in the gastrointestinal microbiota. In addition, some COVID-19 patients may receive antibiotics, which may also disturb gastrointestinal homeostasis. In summary, the gastrointestinal system, gut microbiome, and gut-lung axis may represent an important role in the development, severity, and treatment of COVID-19. Therefore, in this review, we explore the current pieces of evidence of COVID-19 gastrointestinal manifestations, possible implications, and interventions.

关键词： COVID-19 SARS-CoV-2 Gastrointestinal Microbiota Antibiotics

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