Search results for "FLUID"
showing 10 items of 5513 documents
Current and future use of virtual and augmented reality in minimal invasive oral surgery
2020
Not available
Evaluation of a lattice-Boltzmann method for mercury intrusion porosimetry simulations
2004
We have simulated intrusion of a non-wetting liquid into pores of varying shape and size. Simulations were based on the lattice-Boltzmann method and the Shan–Chen multiphase model. The liquid–solid contact angle for pores with circular cross-section was found to be equal to that for pores with square cross-section, and constant even for small pore sizes if the discretised shape of the circular cross-section was taken into account. For comparison, contact angle was also determined for a liquid column descending in a capillary tube, and the results were found to be consistent. Application of the method to mercury intrusion porosimetry is discussed.
Hyperosmolar therapy for acute brain injury: study protocol for an umbrella review of meta-analyses and an evidence mapping
2020
Introduction Acute brain injury is a challenging public health problem worldwide. Elevated intracranial pressure is a common complication after acute brain injury. Hyperosmolar therapy is one of the main therapeutic strategies for the management of intracranial hypertension. This study protocol outlines an umbrella review of meta-analyses which will investigate the benefits and harms of hyperosmolar therapy routinely used for the management of acute brain injury in the intensive care. Methods and analysis We will search PubMed/MEDLINE, EMBASE and the Cochrane Database of Systematic Reviews. We will include meta-analyses of primary research studies (eg, randomised controlled trials, observat…
Trasmissione del calore nei letti fluidizzati con liquidi
2007
Lo studio dei fenomeni relativi all’idrodinamica ed allo scambio termico nei letti fluidizzati è di grande interesse nell’Energetica industriale. Infatti è necessaria la loro comprensione per proporre modelli affidabili ai fini della progettazione e della simulazione del funzionamento delle tante apparecchiature nelle quali essi si manifestano. In molti processi industriali i contatti e le interazioni tra fluidi, siano essi liquidi o gas, e particolati solidi consentono una grande varietà di utili applicazioni. Si tratta del campo dell’ingegneria della fluidizzazione, che ha suscitato un ampio interesse fin dalla realizzazione, durante la Seconda Guerra Mondiale, dei reattori a letto fluido…
New Inferences on Magma Dynamics in Melilitite-Carbonatite Volcanoes: The Case Study of Mt. Vulture (Southern Italy)
2022
This study provides the first micro-thermometric data of fluid inclusions (FIs) in mafic loose (disaggregated) xenocrysts and ultramafic xenoliths in explosive products of the melilitite-carbonatite Mt. Vulture volcano (southern Italy). Pure CO2 late stage FIs hosted in rock-forming minerals of wehrlite xenoliths and clinopyroxene xenocrysts were trapped at the local crust-mantle boundary (32 km). In contrast, trapping pressures within the loose olivine xenocrysts are from 3.2 to 4.5 kbar (8–13 km). Considering the ongoing degassing of mantle-derived CO2 rich gases, together with seismic evidences of the presence of low amount of melts at depth, and the tectonic control of the past volcanic…
Effect of seasonality on physico-chemical and microbiological properties of nicastrese milk and artisanal cheese
2021
ABSTRACT Nicastrese is an indigenous Italian goat breed reared in the Calabria region under semi-extensive practices. From January to June, the milk yield of 400 multiparous Nicastrese goats was evaluated. In addition, tank milk and ripened cheese samples were subjected to physico-chemical and microbiological analyses with the aim to assess the effect of the seasonality on quality parameters. The volatile organic compounds profile of the ripened Nicastrese cheese samples was evaluated. Results showed that the seasonality had a significant effect on milk fat, lactose, urea, citric acid contents and acidity. Microbiological analysis of tank milk samples revealed variability among the differen…
The microbial community of the coelomic fluid of the sea urchin Paracentrotus lividus
2016
ELECTROCHEMICAL MICROREACTORS FOR SYNTHESIS OF CHEMICALS AND ABATEMENT OF ORGANIC POLLUTTANTS
2014
Electrochemical methods can offer new sustainable routes for both the synthesis of chemicals and the abatement of organic pollutants resistant to biological processes. These methods use a clean reagent, the electron, and very mild operative conditions (ambient temperature and atmospheric pressure) with limited operative costs. However, electrochemical processes present some important disadvantages when performed in conventional reactors. In particular, to achieve reasonable cell voltages when the medium has not an adequate conductivity, one needs adding to the system a supporting electrolyte. This is certainly a main obstacle for a wide application of electrochemical tools. Indeed, adding c…
ABATEMENT OF ACID ORANGE 7 IN WATER BY DIFFERENT ELECTROCHEMICAL APPROACHES
2014
Very large amounts of synthetic dyes are discharged in the environment from industrial effluents [1]. Due to their large-scale production and extensive application, synthetic dyes can cause considerable nonaesthetic pollution and are serious health-risk factors [2]. Dyes are commonly classified from their chromophore group. The majority of these compounds consumed at industrial scale are azo (–N=N–) derivatives that represent more than 50% of the all dyes used in textile industries, although antraquinone, indigoide, triphenylmethyl, xanthene, sulphur and phtalocyanine derivatives are frequently utilized [3]. Since dyes usually present high stability under sunlight and resistance to microbia…
Characterization of dry-film photolithography for the study of B. burgdorferi motility
2017
Kuivafilmilitografian karakterisointi Borrelia burgdorferi:n liikkuvuuden tutkimiselle. Borrelia burgdorferi on puutiaisten kantama spirokeettabakteeri, joka voi tarttua useisiin eläinlajeihin. Ihmisillä B. burgdorferi aiheuttaa borrelioosia. Tauti on laajalle levinnyt monissa pohjois- ja länsimaissa ja leviää entisestään ilmastonmuutoksen laajentaessa punkkien elinaluetta. Monet tekijät vaikeuttavat borrelioosin hoitoa. B. burgdorferin kyky välttää ihmisen luontaista immuunijärjestelmää ovat tässä suhteessa merkittävä. Bakteerien liikkuvuus on olennainen tämän kyvyn kannalta, mutta sen tarkka rooli bakteerien kyvyssä liikkua verisuonistossa on osittain tuntematon. Mikrofluidistiikka hyödyn…