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Direct Simulation of Charge Transport in Graphene Nanoribbons

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Communications in Computational Physics 2022年第2期31卷 449-494页

作者： Giovanni Nastasi V.Dario Camiola vittorio romano Universita degli Studi di Catania Dipartimento di Matematica e InformaticaViale Andrea Doria 695125 CataniaItaly

Graphene nanoribbons are considered as one of the most promising ways to design electron devices where the active area is made of *** fact,graphene nanoribbons present a gap between the valence and the conduction bands as in standard semiconductors such as Si or GaAs,at variancewith large area graphenewhich is gapless,a feature that hampers a good performance of graphene field effect *** use graphene nanoribbons as a semiconductor,an accurate analysis of their electron properties is ***,electron transport in graphene nanoribbons is investigated by solving the semiclassical Boltzmann equation with a discontinuous Galerkin *** the electron-phonon scattering mechanisms are *** adopted energy band structure is that devised in[1]while according to[2]the edge effects are described as an additional scattering stemming from the Berry-Mondragon model which is valid in presence of edge *** this approach a spacial 1D transport problem has been solved,even if it remains two dimensional in the wavevector space.A degradation of charge velocities,and consequently of the mobilities,is found by reducing the nanoribbon width due mainly to the edge scattering.

关键词： Graphene nanoribbons bipolar charge transport discontinuous Galerkin method

Influence of Radial Dimension and Electric Field on a Microwave-Assisted Esterification

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Engineering（科研） 2022年第11期14卷 497-509页

作者： vittorio romano Rino Apicella Department of Industrial Engineering University of Salerno Fisciano (SA) Italy

Enzymatic synthesis of ethyl hexanoate from hexanoic acid and ethanol in a solvent-free system, carried out at optimum conditions, has been modeled. The process follows a Ping-Pong Bi-Bi reaction rate and it is endothermic, so microwave heating is provided to prevent its shutdown. The mathematical model has been numerically solved with the FEM method. Results show that microwave heating can be successfully used to carry out this kind of reaction.

关键词： Enzymatic Kinetics Microwave Heating FEM

Microwave Heating of Liquid Foods

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Engineering（科研） 2015年第6期7卷 297-306页

作者： vittorio romano Rino Apicella Dipartimento di Ingegneria Industriale Università degli Studi di Salerno Fisciano Italy

A mathematical model has been formulated to describe the heat transfer in liquid foods flowing in circular ducts, subjected to microwave irradiations. Three types of liquids with different rheological behavior are considered: skim milk (Newtonian), apple sauce and tomato sauce as non-New-tonian fluids. Each one can flow with different velocities but always in laminar way. The temperature profiles have been obtained solving the transient momentum and heat equations by numerical resolution using the Finite Element Method. The generation term due to the microwave heating has been evaluated according to Lambert’s law. Dielectric properties are considered to be temperature dependent.

关键词： Continuous Microwave Heating Lambert’s Law Non-Newtonian Fluids FEM

Comparison between Lambert and Maxwell Approaches in the Modelling of Microwave Heating of Liquid Foods

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Engineering（科研） 2019年第1期11卷 1-13页

作者： Rino Apicella vittorio romano Department of Industrial Engineering University of Salerno Fisciano Italy

Microwave heating of liquid foods in laminar flow through a circular tube has been modeled. In particular, skim milk as a Newtonian fluid and apple sauce and tomato sauce as non-Newtonian fluids have been considered. The temperature profiles have been obtained solving the motion and energy equations in transient regime and Maxwell’s equations in the frequency domain. Numerical resolution of Finite Element Method has been implemented in Comsol Multiphysics. The generation term due to the microwave heating has been evaluated according both to Lambert’s law and Poynting theorem. Finally, a comparison between the two methods has been made in order to check to what extent the results obtained with the simpler Lambert’s law approximation are comparable with those deriving from the exact solution of Maxwell equations. Dielectric properties are considered to be temperature dependent.

关键词： Continuous Microwave Heating Lambert’s Law Maxwell Equations Poynting Theorem Non-Newtonian Fluids FEM

Mathematical Modeling of Sucrose Hydrolysis with Product and Substrate Inhibition

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Engineering（科研） 2020年第4期12卷 280-289页

作者： Brunella Ascione Rino Apicella vittorio romano Department of Industrial Engineering University of Salerno Fisciano Italy

In this work, the enzymatic hydrolysis reaction of sucrose through invertase under unsteady-state conditions has been investigated. The aim is to evaluate the inhibition phenomena influence on the reaction rate and, then, on the concentration and temperature profiles by simulating the process in a tubular reactor, varying the enzyme concentration and the reactant mixture velocity. The transport phenomena considered during the enzymatic hydrolysis process have been described by means of unsteady-state momentum, mass and energy balance equations, taking into account molecular and convective transport and generation terms. Interpretation and discussion of the results obtained by FEM resolution of PDEs involved allow to understand the relevance of the operating parameters.

关键词： Sucrose Hydrolysis Product and Substrate Inhibitions Transport Phenomena Finite Element Method

Helicobacter pylori gamma-glutamyl transpeptidase and its pathogenic role

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World Journal of Gastroenterology 2014年第3期20卷 630-638页

作者： vittorio Ricci Maria Giannouli Marco romano Raffaele Zarrilli Department of Molecular Medicine Human Physiology SectionUniversity of Pavia Medical School Department of Public Health Hygiene SectionUniversity of Naples "Federico Ⅱ" Department of Clinical and Experimental Medicine Chair of GastroenterologySecond University of Naples CEINGE Biotecnologie Avanzate

Helicobacter pylori(***)gamma-glutamyl transpeptidase(GGT)is a bacterial virulence factor that converts glutamine into glutamate and ammonia,and converts glutathione into glutamate and *** GGT causes glutamine and glutathione consumption in the host cells,ammonia production and reactive oxygen species *** products induce cell-cycle arrest,apoptosis,and necrosis in gastric epithelial *** GGT may also inhibit apoptosis and induce gastric epithelial cell proliferation through the induction of cyclooxygenase-2,epidermal growth factor-related peptides,inducible nitric oxide synthase and *** GGT induces immune tolerance through the inhibition of T cell-mediated immunity and dendritic cell *** effect of GGT on *** colonization and gastric persistence are also discussed.

关键词： Helicobacter pylori Gamma-glutamyl transpeptidase Bacterial virulence factor Gastric epithelial cell damage T cell-mediated immunity

Molecular cross-talk between Helicobacter pylori and human gastric mucosa

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World Journal of Gastroenterology 2011年第11期17卷 1383-1399页

作者： vittorio Ricci Marco romano Patrice Boquet Department of Physiology Human Physiology SectionUniversity of Pavia Medical School27100 PaviaItaly Department of Internal Medicine Chair of GastroenterologySecond University of Naples80131 NaplesItaly Department of Clinical Bacteriology Nice University Medical School06202 NiceFrance

Helicobacter pylori (***) has co-evolved with humans to be transmitted from person to person and to colonize the stomach persistently.A well-choreographed equilibrium between the bacterial effectors and host responses permits microbial persistence and health of the host,but confers a risk for serious diseases including gastric *** its long coexistence with humans,*** has developed complex strategies to limit the degree and extent of gastric mucosal damage and in? ammation,as well as immune effector *** present editorial thus aims to introduce and comment on major advances in the rapidly developing area of ***/human gastric mucosa interaction (and its pathological sequelae),which is the result of millennia of co-evolution of,and thus of reciprocal knowledge between,the pathogen and its human host.

关键词： Helicobacter pylori Gastric mucosa Pathogen/host interaction Gastric diseases Bacterial virulence factors CagA VacA

Hepatic resection beyond barcelona clinic liver cancer indication:When and how

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World Journal of Hepatology 2016年第11期8卷 513-519页

作者： Mattia Garancini Enrico Pinotti Stefano Nespoli Fabrizio romano Luca Gianotti vittorio Giardini Department of Surgery Hepatobiliopancreatic UnitSan Gerardo HospitalUniversity of Milano Bicocca

Hepatocellular carcinoma(HCC)is the main common primary tumour of the liver and it is usually associated with *** barcelona clinic liver cancer(BCLC)classification has been approved as guidance for HCC treatment algorithms by the European Association for the Study of Liver and the American Association for the Study of Liver *** to this algorithm,hepatic resection should be performed only in patients with small single tumours of 2-3 cm without signs of portal hypertension(PHT)or *** classification has been criticised and many studies have shown that multiple tumors and large tumors,as wide as those with macrovascular infiltration and PHT,could benefit from liver ***,treatment guidelines should be revised and patients with intermediate/advanced stage HCC,when technically resectable,should receive the opportunity to be treated with radical surgical ***,the surgical treatment of HCC on cirrhosis is complex:The goal to be oncologically radical has always to be balanced with the necessity to minimize organ *** aim of this review was to analyze when and how liver resection could be indicated beyond BCLC *** particular,the role of multidisciplinary approach to assure a proper indication,of the intraoperative ultrasound for intraoperative restaging and resection guidance and of laparoscopy to minimize surgical trauma have been enhanced.

关键词： Hepatocellular carcinoma Liver surgery Hepatic resection Multiple hepatocellular carcinoma Cirrhosis Barcelona clinic liver cancer Multidisciplinary approach Intraoperative ultrasound Laparoscopy Portal hypertension

Atypical antipsychotics and oxidative cardiotoxicity:review of literature and future perspectives to prevent sudden cardiac death

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Journal of Geriatric Cardiology 2021年第8期18卷 663-685页

作者： Stefano D’Errico Raffaele La Russa Aniello Maiese Alessandro Santurro Matteo Scopetti Silvia romano Martina Zanon Paola Frati vittorio Fineschi Department of Medical Surgical and Health SciencesUniversity of TriesteTriesteItaly Department of Clinical and Experimental Medicine University of FoggiaFoggiaItaly IRCSS Neuromed Mediterranean Neurological Institute PozzilliItaly Department of Surgical Pathology MedicalMolecular and Critical AreaUniversity of PisaPisaItaly Department of Anatomical HistologicalForensic and Orthopaedic SciencesSapienza University of RomeRomeItaly

Oxidative stress is considered the principal mediator of myocardial injury under pathological *** is well known that reactive oxygen(ROS)or nitrogen species(RNS)are involved in myocardial injury and repair at the same time and that cellular damage is generally due to an unbalance between generation and elimination of the free radicals due to an inad-equate mechanism of antioxidant defense or to an increase in ROS and *** adverse cardiovascular events are often asso-ciated with drugs with associated findings such as fibrosis or inflammation of the *** efforts in the preclinical phase of the development of drugs,cardiotoxicity still remains a great *** toxicity due to second-generation anti-psychotics(clozapine,olanzapine,quetiapine)has been observed in preclinical studies and described in patients affected with mental disorders.A role of oxidative stress has been hypothesized but more evidence is needed to confirm a causal relationship.A better knowledge of cardiotoxicity mechanisms should address in the future to establish the right dose and length of treatment without impacting the physical health of the patients.

关键词： drugs inflammation oxidative