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Bidirectional Electron Transfer in the Reaction Centre of Photosystem I

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Journal of Integrative Plant Biology 2010年第8期52卷 735-749页

作者： Stefano Santabarbara luca Galuppini Anna Paola Casazza Istituto di Biofisica Consiglio Nazionale delle Ricerche Department of Physics University of Strathclyde Centre for Fundamental Research in Photosynthesis The Burroughs Consiglio Nazionale delle Ricerche Istituto di Biologia e Biotecnologia Agraria

In the past decade light-induced electron transfer reactions in photosystem I have been the subject of intensive investigations that have led to the elucidation of some unique characteristics, the most striking of which is the existence of two parallel, functional, redox active cofactors chains. This process is generally referred to as bidirectional electron transfer. Here we present a review of the principal evidences that have led to the uncovering of bidirectionality in the reaction centre of photosystem I. A special focus is dedicated to the results obtained combining time-resolved spectroscopic techniques, either difference absorption or electron paramagnetic resonance, with molecular genetics, which allows, through modification of the binding of redox active cofactors with the reaction centre subunits, an effect on their physical-chemical properties.

关键词： Bidirectional Electron Transfer in the Reaction Centre of Photosystem I PsaA

Managing Subjectivity： Neoliberalism, Human Capital and Empowerment

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Fudan Journal of the Humanities and Social Sciences 2017年第4期10卷 459-471页

作者： luca Paltrinieri University of Rennes 1 Rennes France

In this paper, I suggest that, even more than the state, capitalist enterprise is the most influential institution of neoliberalism, both for the effect it conveys in terms of management in public institutions （New Public Management） and its influence on the subjectivity of neoliberal individuals. However, one could stress, from the perspective of economic theory of the firm, the neoliberal transformations of the capitalist enterprises itself. Two transformations that are taking place from the 1980s seem particularly important. The first is the firm＇s transformation in a ＂nexus of contracts＂ as claimed by the agency theory of Jensen and Meckling that describe and enable the current financialization of the economy. The second is the trans- formation of organisations in a ＂nexus of skills＂ as claimed by the cognitive paradigm of the firm that apply to the company economic reasoning in terms of ＂human capital＂. I then examine the effects on neoliberal subjectivation of these two major changes, from the labour point of view. First, the neoliberal subject imagines, describes and manages itself as the subject of investment in ＂human capital＂. Second, the disappearance of traditional employment contract corresponds to the emergence and intensification of another form of contract, the ＂psychological contract＂, which tends to become a major form of relationship-employed but also a model for relationships between individuals. Finally, lifelong learning is becoming the major form of empowerment of employees, but also a ＂lifestyle＂ based on the apprecia6on of one＇s own human capital and the infinite task of perfecting oneself to match up our ＂skills portfolio＂ with the labour market. These transformations of neoliberal subjectivity have costs that can be summarised by the widespread phe- nomena of burn out, but also the birth of a new form of racism, based on ＂quality＂ of human capital （skills, abilities, capabilities）.

关键词： Neo-management - Firm Subjectivity Neoliberalism Humancapital

Asymptotic Analysis in a Gas-Solid Combustion Model with Pattern Formation

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Chinese Annals of Mathematics,Series B 2013年第1期34卷 65-88页

作者： Claude-Michel BRAUNER Lina HU luca LORENZI School of Mathematical Sciences Xiamen University Institut de Mathématiques de Bordeaux Université de Bordeaux Dipartimento di Matematica e Informatica Università degli Studi di ParmaParco Area delle Scienze 53/A

The authors consider a free interface problem which stems from a gas-solid model in combustion with pattern formation. A third-order, fully nonlinear, self-consistent equation for the flame front is derived. Asymptotic methods reveal that the interface approaches a solution to the Kuramoto-Sivashinsky equation. Numerical results which illustrate the dynamics are presented.

关键词： Asymptotics Free interface Kuramoto-Sivashinsky equation Pseudo-differential operator Spectral method

Direct oral anticoagulants for the treatment of splanchnic vein thrombosis:A state of art

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世界胃肠病学杂志:英文版 2023年第33期29卷 4962-4974页

作者： Giovanni Monaco luca Bucherini Bernardo Stefanini Fabio Piscaglia Francesco Giuseppe Foschi luca Ielasi Department of Medical and Surgical Sciences University of BolognaBologna 40138Italy Division of Internal Medicine Hepatobiliary and Immunoallergic DiseasesIRCCS Azienda Ospedaliero-Universitaria di BolognaBologna 40138Italy Department of Internal Medicine Ospedale degli Infermi di FaenzaFaenza 48018Italy

Splanchnic vein thrombosis(SVT)is a manifestation of venous thromboembolism in an unusual ***,mesenteric,and splenic veins are the most common vessels involved in SVT which occurs mainly in patients with liver cirrhosis,although non-cirrhotic patients could be affected as *** of hepatic veins,also known as Budd-Chiari syndrome,is another manifestation of *** diagnosis and intervention are mandatory in order to increase the recalization rate and reduce the risk of thrombus progression and hypertensive *** anticoagulation with heparin and vitamin-K antagonists is the treatment of choice in these ***,recent studies have shown promising results on the efficacy and safety of direct oral anticoagulants(DOACs)in this *** results are mainly based on retrospective studies with small sample size,but first clinical trials have been published in the last *** manuscript aims to provide an updated overview of the current evidence regarding the role of DOACs for SVT in both cirrhotic and non-cirrhotic patients.

关键词： Splanchnic vein thrombosis Portal vein thrombosis Budd-Chiari syndrome Direct oral anticoagulants

Gastric endoscopic submucosal dissection in Western countries:Indications,applications,efficacy and training perspective

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World Journal of Gastrointestinal Surgery 2021年第10期13卷 1180-1189页

作者： luca De luca Massimiliano Di Berardino Benedetto Mangiavillano Alessandro Repici Gastroenterology and Digestive Endoscopy Unit Riuniti Marche North HospitalPesaro 61121Italy Gastrointestinal Endoscopy Unit Humanitas-Mater DominiCastellanza 21053Italy Digestive Endoscopy Unit Humanitas Clinical and Research CenterHumanitas UniversityRozzano 20089Italy

Endoscopic submucosal dissection was introduced in Japan for the mini-invasive treatment of early gastric cancer,as part of national screening program considering high prevalence of disease in these *** technique allows en-bloc curative oncological excision and to obtain in a single step R0-resection,characterization,histological staging and potential cure of the tumor with a very high cost-benefit *** the years,Western endoscopists have adopted endoscopic submucosal dissection,achieving good rates of efficacy,long-term improved outcomes and safety,with low risk of local recurrence comparable to those obtained in Asian ***,according to some authors,the excellent outcomes from East country could not be representative of the Western *** epidemiological differences of early gastric cancer,scant volume data and limitations in training opportunities between Western and Eastern countries,European Society of Gastrointestinal Endoscopy have adopted Japanese guidelines and developed a European core curriculum for endoscopic submucosal dissection *** should be able to estimate the probability of performing a curative resection by considering the benefit/risk relationship case-by-case in order to implement a correct decision-making process.

关键词： Endoscopic submucosal dissection Western experience Early gastric cancer Curative oncological excision Long-term outcome Training perspective

ITERATIVE ILU PRECONDITIONERS FOR LINEAR SYSTEMS AND EIGENPROBLEMS

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Journal of Computational Mathematics 2021年第4期39卷 633-654页

作者： Daniele Boffi Zhongjie Lu luca F.Pavarino Computer Electrical and Mathematical Sciences and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Kingdom of Saudi Arabia Dipartimento di Matematica"F.Casorati"University of Pavia Via Ferrata 5 27100 PaviaItaly Dipartimento di Matematica University a di Paviavia Ferrata 527100 PaviaItaly School of Mathematical Sciences University of Science and Technology of ChinaHefei 230026China Dipartimento di Matematica Universita di Paviavia Ferrata 527100 PaviaItaly

Iterative ILU factorizations are constructed,analyzed and applied as preconditioners to solve both linear systems and *** computational kernels of these novel Iterative ILU factorizations are sparse matrix-matrix multiplications,which are easy and efficient to implement on both serial and parallel computer architectures and can take full advantage of existing matrix-matrix multiplication *** also introduce level-based and threshold-based algorithms in order to enhance the accuracy of the proposed Iterative ILU *** results of several numerical experiments illustrate the efficiency of the proposed preconditioners to solve both linear systems and eigenvalue problems.

关键词： Iterative ILU factorization Matrix-matrix multiplication Fill-in Eigenvalue problem Parallel preconditioner

Marine propellers performance and flow-field prediction by a free-wake panel method

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Journal of Hydrodynamics 2014年第5期26卷 780-795页

作者： GRECO luca MUSCARI Roberto TESTA Claudio DI MASCIO Andrea CNR-INSEAN Italian Ship Model BasinRomeItaly CNR-IAC Istituto per le Applicazioni del Calcolo "M. Picone"RomeItaly

A Boundary Element Method （BEM） hydrodynamics combined with a flow-alignment technique to evaluate blades shed vorticity is presented and applied to a marine propeller in open water. Potentialities and drawbacks of this approach in capturing propeller performance, slipstream velocities, blade pressure distribution and pressure disturbance in the flow-field are highlighted by comparisons with available experiments and RANSE results. In particular, correlations between the shape of the convected vortex- sheet and the accuracy of BEM results are discussed throughout the paper. To this aim, the analysis of propeller thrust and torque is the starting point towards a detailed discussion on the capability of a 3-D free-wake BEM hydrodynamic approach to describe the local features of the flow-field behind the propeller disk, in view of applications to propulsive configurations where the shed wake plays a dominant role.

关键词： BEM hydrodynamics free-wake analysis BEM-RANSE comparison

Zooming in REE and Other Trace Elements on Conodonts:Does Taxonomy Guide Diagenesis?

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Journal of Earth Science 2021年第3期32卷 501-511页

作者： luca Medici Martina Savioli Annalisa Ferretti Daniele Malferrari National Research Council of Italy Institute of Methodologies for Environmental AnalysisC.da S.Loja-Zona Industriale85050 Tito ScaloPotenzaItaly Department of Chemical and Geological Sciences University of Modena and Reggio EmiliaVia Campi 10341125 ModenaItaly

Conodont elements are calcium phosphate(apatite structure)mineralized remains of the cephalic feeding apparatus of an extinct marine *** to the high affinity of apatite for rare earth elements(REE)and other high field strength elements(HFSE),conodont elements were frequently assumed to be a reliable archive of sea-water composition and changes that had occurred during ***,the crystallinity index of bioapatite,i.e.,the rate of crystallinity of biologically mediated apatite,should be generally linearly dependent on diagenetic alteration as the greater(and longer)the pressure and temperature to which a crystal is exposed,the greater the resulting *** this study,we detected the uptake of HFSE in conodont elements recovered from a single stratigraphic horizon in the Upper Ordovician of Normandy(France).Assuming therefore that all the specimens have undergone an identical diagenetic history,we have assessed whether conodont taxonomy(and morphology)impacts HFSE uptake and crystallinity *** found that all conodont elements are characterized by a clear diagenetic signature,with minor but significant differences among *** distinctions are evidenced also by the crystallinity index values which show positive correlations with some elements and,accordingly,with diagenesis;however,correlations with the crystallinity index strongly depend on the method adopted for its calculation.

关键词： bioapatite crystallinity index HFSE laser ablation mass spectrometry microdiffraction Normandy Ordovician

Increasing temperatures affect multiyear life cycle of the outbreak bush-cricket Barbitistes vicetinus(Orthoptera,Tettigoniidae)

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Insect Science 2023年第2期30卷 530-538页

作者： Giacomo Ortis Lorenzo Marini Giacomo Cavaletto luca Mazzon Department of Agronomy FoodNatural resourcesAnimals and Environment(DAFNAE)University of PaduaLegnaroItaly

Although outbreaks of rare species are unusual,several insect species have become emerging pests probably due to the ongoing environmental *** vicetinus was first described in 1993 as an endemic bush-cricket of north-east Italy and was considered rare until 2008,when it became an established pest,causing severe damages to forests and *** possible role of temperature in changing its life cycle has still to be fully ***,we explored the effect of summer temperature on egg diapause and the effect of winter temperature on egg *** observations showed that the proportion of embryos that can complete development at the end of summer ranged from zero to nearly 90% depending on summer temperatures.A substantial shift in the rate of development from 20% to nearly 80% occurred in a thermal range of about 1℃.On the contrary,overwinter egg survival was high and constant(90%)across a wide range of winter temperatures that go well beyond both the cold and warm thermal limits of the current species ***,the results suggest a potential key role of summer temperature warming on the outbreak propensity of this species that is able to switch from a multiyear to an annual life cycle with just a 1-2℃ warming.

关键词： climate change diapauses global warming overwinter survival pest pluriannualcycle