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Mass Transport/Diffusion and Surface Reaction Process with Lattice Boltzmann

Communications in Computational Physics 2011年第5期9卷 1362-1374页

作者： giuseppe de prisco Xiaowen Shan Exa Corporation 55 Network DriveBurlingtonMassachusetts 01773USA Ingrain Inc 3733 Westheimer RoadHoustonTexas 77027USA

Multi-component flow with chemical reactions is a common problem in different industrial applications:the mixing chamber of a reaction injection molding(RIM)machine;the dynamics of diesel soot particles interacting with a porous-ceramic particulate filter;reactive transport in porous media;bio-chemical processes involving enzyme-catalyzed *** all these cases,mass diffusion/convection and wall or volume chemical interactions among components play an important *** the present paper we underline the importance of diffusion/convection/reaction mechanisms in bio-chemical processes using the Lattice Boltzmann(LB)*** bio-application where we studied diffusion/convection/reaction mechanisms is the quorum-sensing pathway for the bio-synthesis of the AI-2,a molecule that allows the bacteria to launch a coordinated attack on a host immune system(see[9,10]for more details of the bio-application).The overall goal is to create a micro-device to screen potential drugs that inhibit AI-2 *** Michaelis-Menten saturation kinetic model is implemented at the reactive surface and the results are shown in terms of two dimensionless numbers:Damkohler(Da)and Peclet(Pe)*** high Pe number a small conversion of reactants into products is obtained at the reactive surface,but the overall flux of products is high;moreover,a fast saturation of the conversion of reactants to products is obtained for high Da *** trade-off for setting the Pe and Da numbers depends on the specific application and the technologies used in the micro-device(e.g.,sensitivity of the detector,cost of reactants).

关键词： Lattice Boltzmann multi-component diffusion-reaction

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Ten years of hip fractures in Italy: For the first time a decreasing trend in elderly women

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World Journal of Orthopedics 2014年第3期5卷 386-391页

作者： prisco Piscitelli Maurizio Feola Cecilia Rao Monica Celi Elena Gasbarra Cosimo Neglia giuseppe Quarta Federico Maria Liuni Simone Parri Giovanni Iolascon Maria Luisa Brandi Alessandro Distante Umberto Tarantino Euro Mediterranean Scientific Biomedical Institute ISBEM Research Centre72023 BrindisiItaly department of Biological and Environmental Sciences and Technologies University of Salento73100 LecceItaly Division of Orthopaedics and Traumatology University of Tor Vergata00133 RomeItaly department of Translational Medicine University of Florence50134 FlorenceItaly department of Orthopaedics and Rehabilitative Medicine Second University of Naples80138 NaplesItaly

AIM:To evaluate the hospitalization rate of femoralneck fractures in the elderly Italian population over ten ***:We analyzed national hospitalizations records collected at central level by the Ministry of Health from 2000 to ***-and sex-specific rates of fractures occurred at femoral neck in people≥65 years *** performed a sub-analysis over a three-year period(2007-2009),presenting data per five-year age groups,in order to evaluate the incidence of the hip fracture in the oldest ***:We estimated a total of 839008 hospitalizations due to femoral neck fractures between 2000 and2009 in people≥65,with an overall increase of 29.8%over 10 *** incidence per 10000 inhabitants remarkably increased in people≥75,passing from158.5 to 166.8(+5.2%)and from 72.6 to 77.5(+6.8%)over the ten-year period in women and men,*** oldest age group(people>85 years old)accounted for more than 42%of total hospital admissions in 2009(n=39000),despite representing only 2.5%of the Italian ***,women aged>85accounted for 30.8%of total fractures,although they represented just 1.8%of the general *** results of this analysis indicate that the incidence of hip fractures progressively increased from 2000 to 2009,but a reduction can be observed for the first time in women≤75(-7.9%between 2004 and 2009).CONCLUSION:Incidence of hip fractures in Italy are continuously increasing,although women aged 65-74years old started showing a decreasing trend.

关键词： Femoral fractures Hip fragility fractures Osteoporosis Hospitalizations Incidence

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