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11.
Henri Berthiaux Antonio Guttierrez Lavin Julio Bueno De Las Heras Marisol Muñiz Alvarez 《加拿大化工杂志》2007,85(2):158-170
Despite of its general use in industry, particle sedimentation is still a not well understood unit operation. Hydrodynamics is complex in essence, mainly because the possible volumes are depending on the operating conditions, which in turn has consequences on the stability of the equipment in unsteady state conditions. 相似文献
12.
Lante Carbognani Joussef Espidel Natasha Carbognani Leryn Albujas Marisol Rosquete Liakarla Parra Jennifer Mota Anita Espidel Nancy Querales 《Petroleum Science and Technology》2000,18(5):671-699
n-Heptane insoluble contents were determined for an extraheavy-oil vacuum residue, one petroleum and one coal pitch as a function of particle size. This variable was found to affect the yields of insoluble material, aspect which was also observed during extractions carried out with aromatic and halogenated solvents. The precision of results was observed to be independent on the operators. A study was carried out to determine the effect of sample drying time on fraction yields. It was found that maltene fractions were strongly dependent on this variable, whereas asphaltene fractions were totally independent
Predissolution in aromatic solvents proved worthless from the repeatability point of view. However, predissolution of the oil residue in CH2Cl2 followed by filtration and asphaltene precipitation with simultaneous solvent removal, was deemed to be a suitable technique to remove mineral matter and isolate asphaltenes in a single step
Sample oxidation during asphaltene precipitation and isolation was detected by gravimetric and spectroscopic techniques. This fact is very important since common precipitation techniques do not address this issue
Preliminary accelerated extraction experiments carried out with pitch samples at high temperature and pressure, revealed that this approach can be a very interesting research tool to investigate solubility properties. 相似文献
Predissolution in aromatic solvents proved worthless from the repeatability point of view. However, predissolution of the oil residue in CH2Cl2 followed by filtration and asphaltene precipitation with simultaneous solvent removal, was deemed to be a suitable technique to remove mineral matter and isolate asphaltenes in a single step
Sample oxidation during asphaltene precipitation and isolation was detected by gravimetric and spectroscopic techniques. This fact is very important since common precipitation techniques do not address this issue
Preliminary accelerated extraction experiments carried out with pitch samples at high temperature and pressure, revealed that this approach can be a very interesting research tool to investigate solubility properties. 相似文献
13.
María I. Gil Marisol Castañer Federico Ferreres Francisco Artés F. A. Tomás-Barberán 《European Food Research and Technology》1998,206(5):350-354
The effect of modified-atmosphere packaging (MAP) on the amount of soluble phenolics in, and the visual appearance of, white,
green and red tissues of minimally processed “Lollo Rosso” lettuce were evaluated. Minimal processing induced a two-fold increase
in the amount of soluble phenylpropanoids in the midribs during storage in air at 5°C. When the lettuce was stored in the
presence of 2–3% O2 and 12–14% CO2, this increase was not induced and no browning was observed. A particularly marked decrease in the amount of phenylpropanoids
was observed in MAP-stored green and red tissues. The concentrations of flavonoids and anthocyanins did not change much in
midribs and green tissues, while they were significantly degraded in red tissues under MAP conditions. MAP storage proved
useful in the prevention of browning, the main cause of quality loss in minimally processed “Lollo Rosso” lettuce. However,
MAP storage was not so beneficial for the preservation of the quality of red tissues and, in fact, their overall visual quality,
texture, aroma and macroscopic breakdown under MAP conditions were worse than those of air-stored tissues.
Received: 5 November 1997 相似文献
14.
Effect of alkylglycerol‐rich oil and rosemary extract on oxidative stability and antioxidant properties of a cooked meat product 下载免费PDF全文
15.
A way to deal with the increasing cost of next generation real-time applications is to extend middleware and high-level general-purpose programming languages, e.g. Java, with real-time support that reduces development, deployment, and maintenance costs. In the particular path towards a distributed real-time Java technology, some important steps have been given into centralized systems to produce real-time Java virtual machines. However, the integration with traditional remote invocation communication paradigms is far from producing an operative solution that may be used to develop final products. In this context, the paper studies how The Real-Time Specification for Java (RTSJ), the leading effort in real-time Java, may be integrated with Java’s Remote Method Invocation (RMI) in order to support real-time remote invocations. The article details a specific approach towards the problem of producing a predictable mechanism for the remote invocation–the core communication mechanism of RMI–via having control on the policies used in the remote invocation. Results obtained in a software prototype help understand how the key entities defined to control the performance of the remote invocation influence in the end-to-end response time of a distributed real-time Java application. 相似文献
16.
Erika Rubí Luis-García Carina Becerril Alfonso Salgado-Aguayo Omar Emiliano Aparicio-Trejo Yair Romero Edgar Flores-Soto Criselda Mendoza-Milla Martha Montao Victoria Chagoya Jos Pedraza-Chaverri Mohammed El Hafidi Marisol Orozco-Ibarra Annie Pardo Moiss Selman 《International journal of molecular sciences》2021,22(15)
Idiopathic pulmonary fibrosis (IPF) is a devastating disease characterized by increased activation of fibroblasts/myofibroblasts. Previous reports have shown that IPF fibroblasts are resistant to apoptosis, but the mechanisms remain unclear. Since inhibition of the mitochondrial permeability transition pore (mPTP) has been implicated in the resistance to apoptosis, in this study, we analyzed the role of mitochondrial function and the mPTP on the apoptosis resistance of IPF fibroblasts under basal conditions and after mitomycin C-induced apoptosis. We measured the release of cytochrome c, mPTP opening, mitochondrial calcium release, oxygen consumption, mitochondrial membrane potential, ADP/ATP ratio, ATP concentration, and mitochondrial morphology. We found that IPF fibroblasts were resistant to mitomycin C-induced apoptosis and that calcium, a well-established activator of mPTP, is decreased as well as the release of pro-apoptotic proteins such as cytochrome c. Likewise, IPF fibroblasts showed decreased mitochondrial function, while mPTP was less sensitive to ionomycin-induced opening. Although IPF fibroblasts did not present changes in the mitochondrial membrane potential, we found a fragmented mitochondrial network with scarce, thinned, and disordered mitochondria with reduced ATP levels. Our findings demonstrate that IPF fibroblasts are resistant to mitomycin C-induced apoptosis and that altered mPTP opening contributes to this resistance. In addition, IPF fibroblasts show mitochondrial dysfunction evidenced by a decrease in respiratory parameters. 相似文献
17.
Marta Consegal Norberto Núez Ignasi Barba Begoa Benito Marisol Ruiz-Meana Javier Inserte Ignacio Ferreira-Gonzlez Antonio Rodríguez-Sinovas 《International journal of molecular sciences》2021,22(8)
Succinate dehydrogenase (SDH) inhibition with malonate during reperfusion reduced myocardial infarction in animals, whereas its endogenous substrate, succinate, is detected in plasma from STEMI patients. We investigated whether protection by SDH inhibition is additive to that of remote ischemic perconditioning (RIC) in pigs submitted to transient coronary artery occlusion, and whether protective maneuvers influence plasma levels of citric acid cycle metabolites. Forty pigs were submitted to 40 min coronary occlusion and reperfusion, and allocated to four groups (controls, sodium malonate 10 mmol/L, RIC, and malonate + RIC). Plasma was obtained from femoral and great cardiac veins and analyzed by LC-MS/MS. Malonate, RIC, and malonate + RIC reduced infarct size (24.67 ± 5.98, 25.29 ± 3.92 and 29.83 ± 4.62% vs. 46.47 ± 4.49% in controls, p < 0.05), but no additive effects were detected. Enhanced concentrations of succinate, fumarate, malate and citrate were observed in controls during initial reperfusion in the great cardiac vein, and most were reduced by cardioprotective maneuvers. Concentrations of succinate, fumarate, and malate significantly correlated with infarct size. In conclusion, despite the combination of SDH inhibition during reperfusion and RIC did not result in additive protection, plasma concentrations of selected citric acid cycle metabolites are attenuated by protective maneuvers, correlate with irreversible injury, and might become a prognosis tool in STEMI patients. 相似文献
18.
Revathy Carnagarin Kearney Tan Leon Adams Vance B. Matthews Marcio G. Kiuchi Leslie Marisol Lugo Gavidia Gavin W. Lambert Elisabeth A. Lambert Lakshini Y. Herat Markus P. Schlaich 《International journal of molecular sciences》2021,22(8)
Metabolic dysfunction-associated fatty liver disease (MAFLD) is the most common liver disease affecting a quarter of the global population and is often associated with adverse health outcomes. The increasing prevalence of MAFLD occurs in parallel to that of metabolic syndrome (MetS), which in fact plays a major role in driving the perturbations of cardiometabolic homeostasis. However, the mechanisms underpinning the pathogenesis of MAFLD are incompletely understood. Compelling evidence from animal and human studies suggest that heightened activation of the sympathetic nervous system is a key contributor to the development of MAFLD. Indeed, common treatment strategies for metabolic diseases such as diet and exercise to induce weight loss have been shown to exert their beneficial effects at least in part through the associated sympathetic inhibition. Furthermore, pharmacological and device-based approaches to reduce sympathetic activation have been demonstrated to improve the metabolic alterations frequently present in patients with obesity, MetSand diabetes. Currently available evidence, while still limited, suggests that sympathetic activation is of specific relevance in the pathogenesis of MAFLD and consequentially may offer an attractive therapeutic target to attenuate the adverse outcomes associated with MAFLD. 相似文献
19.
A polymeric pro-drug was produced by means of two-step grafting of N-vinylcaprolactam and 2-methacryloyloxy-benzoic acid (2MBA) onto polypropylene sutures, showing in vitro slow release of salicylic acid (SA). Pre-irradiation grafting method was implemented to functionalize the surface of sutures using gamma rays as starter to induce the polymerization process. 2MBA was grafted on a polymer surface to obtain a polymeric system with ability to release SA in a localized site by hydrolysis of its labile ester bond. Factors such as applied dose, reaction time, temperature reaction, and monomer concentration were analyzed to understand how it affects the grafting process. Functionalized sutures were analyzed by FTIR-ATR, thermogravimetric analysis, and DSC. The release profile study of block copolymer was carried out in a phosphate buffer solution at pH 7.4 and 37°C; the assay was monitored by UV–vis at 296?nm; finally, molecule of released SA was identified by mass spectrometry. 相似文献
20.
Iria Estvez‐Ayres Pablo Basanta‐Val Marisol García‐Valls 《Concurrency and Computation》2014,26(1):152-193
During the last decade, the number of distributed application domains with temporal requirements has significantly augmented, arising the necessity of exploring new concepts and paradigms that allow, on the one hand, the development of dynamic and flexible distributed applications and, on the other hand, the reusability of code. Service‐oriented paradigms have been successfully applied to distributed environments, increasing their flexibility and allowing the reusability of their components. Besides, distributed real‐time Java technologies have shown to be a good candidate to deploy real‐time distributed applications. This paper presents a model for service‐oriented applications on a time‐triggered distributed real‐time Java environment, focusing on the definition of the temporal model of an application and its schedulability, applying and evaluating this model in real‐time service‐oriented composition algorithms. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献