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151.
Morales Rodolfo D. Calderón-Hurtado Fabián Andrés Chattopadhyay Kinnor Guarneros Sergio Javier Guarneros 《Metallurgical and Materials Transactions B》2020,51(2):628-648
Metallurgical and Materials Transactions B - Flow structures of liquid steel during stirring operations with argon injection in a ladle are studied using physical and mathematical models. Emphasis... 相似文献
152.
Ambra Costa Davide Ceresa Antonella De Palma Rossana Rossi Sara Turturo Sara Santamaria Carolina Balbi Federico Villa Daniele Reverberi Katia Cortese Pierangela De Biasio Dario Paladini Domenico Coviello Silvia Ravera Paolo Malatesta Pierluigi Mauri Rodolfo Quarto Sveva Bollini 《International journal of molecular sciences》2021,22(7)
We previously reported that c-KIT+ human amniotic-fluid derived stem cells obtained from leftover samples of routine II trimester prenatal diagnosis (fetal hAFS) are endowed with regenerative paracrine potential driving pro-survival, anti-fibrotic and proliferative effects. hAFS may also be isolated from III trimester clinical waste samples during scheduled C-sections (perinatal hAFS), thus offering a more easily accessible alternative when compared to fetal hAFS. Nonetheless, little is known about the paracrine profile of perinatal hAFS. Here we provide a detailed characterization of the hAFS total secretome (i.e., the entirety of soluble paracrine factors released by cells in the conditioned medium, hAFS-CM) and the extracellular vesicles (hAFS-EVs) within it, from II trimester fetal- versus III trimester perinatal cells. Fetal- and perinatal hAFS were characterized and subject to hypoxic preconditioning to enhance their paracrine potential. hAFS-CM and hAFS-EV formulations were analyzed for protein and chemokine/cytokine content, and the EV cargo was further investigated by RNA sequencing. The phenotype of fetal- and perinatal hAFS, along with their corresponding secretome formulations, overlapped; yet, fetal hAFS showed immature oxidative phosphorylation activity when compared to perinatal ones. The profiling of their paracrine cargo revealed some differences according to gestational stage and hypoxic preconditioning. Both cell sources provided formulations enriched with neurotrophic, immunomodulatory, anti-fibrotic and endothelial stimulating factors, and the immature fetal hAFS secretome was defined by a more pronounced pro-vasculogenic, regenerative, pro-resolving and anti-aging profile. Small RNA profiling showed microRNA enrichment in both fetal- and perinatal hAFS-EV cargo, with a stably- expressed pro-resolving core as a reference molecular signature. Here we confirm that hAFS represents an appealing source of regenerative paracrine factors; the selection of either fetal or perinatal hAFS secretome formulations for future paracrine therapy should be evaluated considering the specific clinical scenario. 相似文献
153.
Computational Economics - This work presents a novel application of the Stochastic Dual Dynamic Problem (SDDP) to large-scale asset allocation. We construct a model that delivers allocation... 相似文献
154.
This paper presents, for the first time, the application of the strength Pareto evolutionary algorithm to the multi-objective design of isolated hybrid systems, minimising both the total cost throughout the useful life of the installation and the unmet load. For this task, a multi-objective evolutionary algorithm (MOEA) and a genetic algorithm (GA) have been used in order to find the best combinations of components for the hybrid system and control strategy. Also, a novel control strategy has been developed and it will be expounded in this article. As an example of application, a PV–wind–diesel system has been designed, obtaining a set of possible solutions (Pareto set) from which the designer can choose those which he/she prefers considering the costs and unmet load of each. The results obtained demonstrate the practical utility of the design method used. 相似文献
155.
156.
Caio Fernando Gromboni Rodolfo Carapelli Edenir Rodrigues Pereira-Filho Ana Rita Araujo Nogueira 《Food Analytical Methods》2010,3(2):98-103
In this work, an exploratory study about the mineral characteristic of some fruit juice (passion fruit, pineapple, orange,
and grape) applying chemometric tools was made. The juices analyzed were separated in different groups by principal components
analysis and hierarchical components analysis in accordance with their minerals contents. Barium, C, Ca, K, Mg, Mn, Na, and
Sr were determined by inductively coupled plasma optical emission spectrometry. Addition and recovery methods were used for
confirmation of the results. The recovery range for microwave sample preparation was from 81% (for K) to 111% (for Mn), for
photo-Fenton from 102% (for Ca e Mg) to 128% (for Na), and the direct analysis, without sample preparation step, from 96%
(for K) to 139% (for Mn). A new method based on photo-Fenton reaction coupled with microwave radiation for juice decomposition
was proposed; the obtained results were satisfactory and compatible with the conventional methods of analysis in accordance
with Student’s statistic t test and chemometric tools. 相似文献
157.
Rodolfo J. González-Paz Ana M. Ferreira Clara Mattu Francesca Boccafoschi Gerard Lligadas Juan C. Ronda Marina Galià Virginia Cádiz Gianluca Ciardelli 《Reactive and Functional Polymers》2013,73(5):690-697
Two different polyurethanes synthesized from two triols derived from undecenoic acid (PU1) and oleic acid (PU2) fatty acids were functionalised with Collagen type I via plasma treatment aimed at obtaining novel biomaterials with improved biological properties. Scanning Electron Microscopy, X-ray photoelectron spectroscopy, optical microscopy, colorimetric titration methods and contact angle measurements confirmed the surface changes at each stage of treatment, both in terms of morphology and chemical composition. The results for osteoblastic cells (MG63) cultured in vitro proved that PUs modified with collagen had better cytocompatibility that the control PUs. In particular, PU2 displays higher cytocompatibility. 相似文献
158.
In this paper, several designs of hybrid PV–wind (photovoltaic–wind) systems connected to the electrical grid, including the intermittent production of hydrogen, are shown. The objective considered in the design is economical to maximise the net present value (NPV) of the system. 相似文献
159.
Rodolfo Xavier de Sousa-Lima Kaiza de Sousa Santos Lucas José de Azevedo Silva Letícia Virgínia de Freitas Chaves Roberta Caroline Brushi Alonso Boniek Castillo Dutra Borges 《Microscopy research and technique》2022,85(3):1101-1107
This study aimed to evaluate the influence of sterilization methods on conventional and bulk-fill resin composites' (BFRCs) surface properties in an attempt to preview bias in laboratory bacterial adhesion tests. Two regular viscosity conventional resin composites [Filtek Z350 XT™ (Z350) and IPS Empress Direct™ (ED)] and two regular viscosity BFRCs [Filtek Bulk Fill™ (FILT) and Tetric N-Ceram Bulk Fill IVA™ (TBF)] were used. The materials were characterized by Scanning Electron Microscopy (SEM), surface roughness (SR), and wettability (W) after sterilization with hydrogen peroxide gas plasma (HPGP) and steam sterilization (SS). Nonsterilized samples served as a control group (n = 5). Statistical analysis was performed using two-way analysis of variance (ANOVA) and Tukey post hoc test (p < 0.05). For SR, there were no statistically significant differences among the groups (p > .05). SS method decreased the contact angle for FILT and Z350 (p < .01). The SS promoted more exposition of filler particles, while the HPGP method did not alter the tested materials' morphology. Therefore, sterilization methods affected the resin composites tested selectively. HPGP seems to be the most recommended method to sterilize the tested resin composites before laboratory bacterial adhesion tests. 相似文献
160.
Rodolfo L.B.A. Medeiros Heloísa P. Macedo Gilvan P. Figueredo Tiago R. Costa Renata M. Braga Marcus A.F. Melo Dulce M.A. Melo 《International Journal of Hydrogen Energy》2017,42(39):24823-24829
The reactivity of Ni-based oxygen carrier (OC) was studied by CH4 pulse test. The MgAl2O4 spinel was synthesized by microwave assisted combustion method and Ni and Fe were added by wet impregnation method. The results of CH4 pulse test revealed that the OCs were more reactive for partial oxidation reaction. The XRD analysis of OCs after the test confirms the presence of NiO and MgAl2O4 without the secondary phases like NiAl2O4 and FeAl2O4. Among the OCs, Ni15Fe2MA was the most reactive producing the highest amounts of H2 and exhibiting good re-oxidation capacity, illustrating its potential for use in Chemical Looping Reforming (CLR). The high reactivity is associated to a change on the NiO-support interaction. 相似文献