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Microbial Exopolymers: Sources, Chemico-Physiological Properties, and Ecosystem Effects in the Marine Environment

Authors: --- --- --- --- et al.
Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889456024 Year: Pages: 152 DOI: 10.3389/978-2-88945-602-4 Language: English
Publisher: Frontiers Media SA
Subject: Science (General) --- Oceanography --- Microbiology
Added to DOAB on : 2019-01-23 14:53:43
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Microorganisms (bacteria, archaea, microeukaryotes) in marine environments secrete a diverse array of exopolymeric substances that facilitate attachment to surfaces, the formation of organic colloids and larger aggregations of cells (marine snow), and that can influence many ocean, as well as global, processes. The aim of this Research Topic is to highlight recent advances in the sources, chemistry and function of these microbial-produced macromolecules. We encouraged original research and reviews on exopolymeric substances, from their sources, chemico-physiological properties, functions and ecosystem effects, and including their role in the Gulf of Mexico following the Deepwater Horizon oil spill disaster.

Engineering Fluid Dynamics

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ISBN: 9783038426684 9783038426691 Year: Pages: 210 DOI: 10.3390/books978-3-03842-669-1 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Chemical Engineering
Added to DOAB on : 2018-01-31 13:09:30
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This book contains the successful submissions to a Special Issue of Energies on the subject area of “Engineering Fluid Dynamics”. The topic of engineering fluid dynamics includes both experimental as well as computational studies. Of special interest were submissions from the fields of mechanical, chemical, marine, safety, and energy engineering. We welcomed both original research articles as well as review articles. After one year, 22 papers were submitted and 12 were accepted for publication. The average processing time was 65.2 days. The authors had the following geographical distribution: China (four); Italy (two); Korea (one); Germany (one); UK (one); Ireland (one); Australia (one); Sweden (one); Japan (one); Spain (one); Norway (one).Papers covered topics such as heat transfer in shell and helically coiled tube heat exchangers, the multiphase modeling of sprays, flashing flows, as well as mixing in a bubbling fluidized bed. Two papers related to heating ventilation and air condition (HVAC) are included, namely evaporation and condensation in the underfloor space of detached houses and air distribution in a railway vehicle. Three papers dealt with various aspects of pumps and turbines: a performance prediction method for pumps as turbines; noise radiation in a centrifugal pump; periodic fluctuations in energy efficiency in centrifugal pumps; and study of a high-pressure external gear pump. One paper used both laser doppler velocimetry (LDV) and CFD in the study of flow behind a semi-circular step cylinder. Finally, a paper investigated the influence of the equivalence ratio (ER) and feedstock particle size on birch wood gasification.

Engineering Fluid Dynamics 2018

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ISBN: 9783039281121 9783039281138 Year: Pages: 256 DOI: 10.3390/books978-3-03928-113-8 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: General and Civil Engineering --- Technology (General)
Added to DOAB on : 2020-01-30 16:39:46
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“Engineering Fluid Dynamics 2018”. The topic of engineering fluid dynamics includes both experimental as well as computational studies. Of special interest were submissions from the fields of mechanical, chemical, marine, safety, and energy engineering. We welcomed both original research articles as well as review articles. After one year, 28 papers were submitted and 14 were accepted for publication. The average processing time was 37.91 days. The authors had the following geographical distribution: China (9); Korea (3); Spain (1); and India (1). Papers covered a wide range of topics, including analysis of fans, turbines, fires in tunnels, vortex generators, deep sea mining, as well as pumps.

Keywords

axial fan --- rotating stall --- aerodynamic noise --- numerical simulation --- noise spectrum --- centrifugal pump --- radiation noise --- distribution characteristic --- acoustic energy --- experimental research --- thermosyphon --- volume of fluid --- multiphase flow --- evaporation and condensation --- centrifugal pump --- impeller --- blade wrap angle --- blade exit angle --- optimized design --- deep sea mining --- manganese nodules exploitation --- hydraulic collecting --- suction flow field --- dimensional analysis --- circumferential groove casing treatment --- sweep and lean --- CGCT-blade integrated optimization --- computational fluid dynamics (CFD) --- flow around cylinder --- fluid structure interaction (FSI) --- hydrodynamic response --- numerical methods --- simulation and modeling --- vortex induced vibration (VIV) ratio --- gas turbine --- axial gap --- hot streak --- heat transfer --- leading edge --- global optimization --- cavitation inception --- orthogonal test --- CFD simulation --- two-stage axial fan --- numerical simulation --- abnormal blade installation angle --- rotating stall --- Tesla turbine --- fluid dynamics --- disc thickness --- disc spacing distance --- isentropic efficiency --- plug-holing --- tunnel slope --- fire --- natural ventilation --- ventilation performance --- aspect ratio --- evacuation --- fire propagation --- tunnel vehicle fire --- unsteady heat release rate --- flow control --- vortex generators --- source term --- Computational Fluid Dynamics (CFD) --- OpenFOAM --- wind tunnel

Selected Problems in Fluid Flow and Heat Transfer

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ISBN: 9783039214273 9783039214280 Year: Pages: 460 DOI: 10.3390/books978-3-03921-428-0 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-12-09 11:49:15
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Fluid flow and heat transfer processes play an important role in many areas of science and engineering, from the planetary scale (e.g., influencing weather and climate) to the microscopic scales of enhancing heat transfer by the use of nanofluids; understood in the broadest possible sense, they also underpin the performance of many energy systems. This topical Special Issue of Energies is dedicated to the recent advances in this very broad field. This book will be of interest to readers not only in the fields of mechanical, aerospace, chemical, process and petroleum, energy, earth, civil ,and flow instrumentation engineering but, equally, biological and medical sciences, as well as physics and mathematics; that is, anywhere that “fluid flow and heat transfer” phenomena may play an important role or be a subject of worthy research pursuits.

Keywords

performance characteristics --- Positive Temperature Coefficient (PTC) elements --- heat transfer --- thermal performance --- Computational Fluid Dynamics (CFD) simulation --- air heater --- impingement heat transfer enhancement --- orthogonal jet --- turbulence --- flat plate --- Colebrook equation --- Colebrook-White --- flow friction --- iterative procedure --- logarithms --- Padé polynomials --- hydraulic resistances --- turbulent flow --- pipes --- computational burden --- thermodynamic --- numerical simulation --- thermal effect --- axial piston pumps --- microbubble pump --- bubble generation --- pump efficiency --- bubble size --- concentration --- particle counter --- flow-induced motion --- sharp sections --- T-section prism --- load resistances --- section aspect ratios --- energy conversion --- thermosyphon --- phase change --- two-phase flow --- visualization --- superheated steam --- triaxial stress --- thermogravimetry --- X-ray microtomography --- thermal cracking --- microbubbles --- fluidics --- flow oscillation --- oscillators --- energetics --- pressure loss --- pressure drop --- friction factor --- multiphase flow --- flow rate --- flow regime --- POD --- entropy generation --- boundary layer --- laminar separation bubble --- two-phase flow --- pump performance --- computational fluid dynamics --- centrifugal pump --- flow behavior --- magnetic field --- ferrofluid --- porous cavity --- heat transfer --- mass transfer --- numerical modeling --- numerical modeling --- surrogate model --- correlation --- fin-tube --- spiral fin-tube --- CFD --- ( A g ? F e 3 O 4 / H 2 O ) hybrid nanofluid --- nonlinear thermal radiation --- heat transfer --- chemical reaction --- mass transfer --- method of moment --- numerical results --- transient analysis --- pumps --- moment of inertia --- water hammer --- pipe flow --- wind turbine --- downwind --- tower shadow --- load --- tower --- BEM --- actuator disc --- CANDU-6 --- PHWR --- moderator --- turbulence --- OpenFOAM --- printed circuit heat exchanger --- supercritical LNG --- zigzag type --- heat transfer performance --- gas turbine engine --- particle deposition --- capture efficiency --- multiphase flow --- tip leakage flow --- detached-eddy simulation --- vortex breakdown --- transonic compressor --- POD --- tip leakage flow --- decomposition region --- decomposition dimensionalities --- vortex identification --- SPIV --- fire-spreading characteristics --- real vehicle experiments --- toxic gases --- temperature distributions --- unsteady heat release rate --- thermal energy recovery --- flue gas --- dew point temperature --- condensation --- Aspen® --- thermoacoustic electricity generator --- multi-stage --- traveling-wave heat engine --- push-pull --- inertance-compliance --- acoustic streaming --- n/a

Advanced Synchrotron Radiation Techniques for Nanostructured Materials

Author:
ISBN: 9783039216802 9783039216819 Year: Pages: 138 DOI: 10.3390/books978-3-03921-681-9 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Mathematics --- Science (General)
Added to DOAB on : 2019-12-09 11:49:16
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Nanostructured materials exploit physical phenomena and mechanisms that cannot be derived by simply scaling down the associated bulk structures and phenomena; furthermore, new quantum effects come into play in nanosystems. The exploitation of these emerging nanoscale interactions prompts the innovative design of nanomaterials. Understanding the behavior of materials on all length scales—from the nanostructure up to the macroscopic response—is a critical challenge for materials science. Modern analytical technologies based on synchrotron radiation (SR) allow for the non-destructive investigation of the chemical, electronic, and magnetic structure of materials in any environment. SR facilities have developed revolutionary new ideas and experimental setups for characterizing nanomaterials, involving spectroscopy, diffraction, scatterings, microscopy, tomography, and all kinds of highly sophisticated combinations of such investigation techniques. This book is a collection of contributions addressing several aspects of synchrotron radiation as applied to the investigation of chemical, electronic, and magnetic structure of nanostructured materials. The results reported here provide not only an interesting and multidisciplinary overview of the chemicophysical investigations of nanostructured materials carried out by state-of-the-art SR-induced techniques, but also an exciting glance into the future perspectives of nanomaterial characterization methods.

Advances in Water Distribution Networks

Authors: ---
ISBN: 9783038975564 Year: Pages: 174 DOI: 10.3390/books978-3-03897-557-1 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering --- Environmental Engineering
Added to DOAB on : 2019-03-08 11:42:05
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The Special Issue on Advances in Water Distribution Networks (WDNs) explores four important topics of research in the framework of WDNs, namely simulation and optimization modelling, topology and partitioning, water quality, and service effectiveness. With regard to the first topic, the following aspects are addressed: pressure-driven formulations, algorithms for the optimal location of control valves to minimize leakage, the benefits of water discharge prediction for the remote real time control of valves, and transients generated by pumps operating as turbines. In the context of the second topic, a topological taxonomy of WDNs is presented, and partitioning methods for the creation of district metered areas are compared. In relation to the third topic, the vulnerability to trihalomethane is assessed, and a statistical optimization model to minimize heavy metal releases is presented. Finally, the fourth topic focusses on the estimation of non-revenue water, including leakage and unauthorized consumption, and on the assessment of service under intermittent supply conditions.

Optimization of Heat and Mass Exchange

Authors: --- ---
ISBN: 9783039287420 / 9783039287437 Year: Pages: 182 DOI: 10.3390/books978-3-03928-743-7 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2020-06-09 16:38:57
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This Special Issue of Processes operates on the basis of a rigorous peer-review with a single-blind assessment and at least two independent reviewers, thereby ensuring a high quality final product. I would like to thank our reviewers, for providing the authors with constructive comments, and Editorial Board, for their professional advice that led to the final decision. I am sure that, in coming years, readers of this Special Issue will find the scientific manuscripts interesting and beneficial to their research.

Gas Flows in Microsystems

Authors: ---
ISBN: 9783039215423 9783039215430 Year: Pages: 220 DOI: 10.3390/books978-3-03921-543-0 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General)
Added to DOAB on : 2019-12-09 11:49:16
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The last two decades have witnessed a rapid development of microelectromechanical systems (MEMS) involving gas microflows in various technical fields. Gas microflows can, for example, be observed in microheat exchangers designed for chemical applications or for cooling of electronic components, in fluidic microactuators developed for active flow control purposes, in micronozzles used for the micropropulsion of nano and picosats, in microgas chromatographs, analyzers or separators, in vacuum generators and in Knudsen micropumps, as well as in some organs-on-a-chip, such as artificial lungs. These flows are rarefied due to the small MEMS dimensions, and the rarefaction can be increased by low-pressure conditions. The flows relate to the slip flow, transition or free molecular regimes and can involve monatomic or polyatomic gases and gas mixtures. Hydrodynamics and heat and mass transfer are strongly impacted by rarefaction effects, and temperature-driven microflows offer new opportunities for designing original MEMS for gas pumping or separation. Accordingly, this Special Issue seeks to showcase research papers, short communications, and review articles that focus on novel theoretical and numerical models or data, as well as on new experimental results and technics, for improving knowledge on heat and mass transfer in gas microflows. Papers dealing with the development of original gas MEMS are also welcome.

Keywords

pressure drop --- microchannels --- heat sinks --- slip flow --- electronic cooling --- Knudsen pump --- thermally induced flow --- gas mixtures --- direct simulation Monte Carlo (DSMC) --- microfluidic --- rarefied gas flows --- micro-scale flows --- Knudsen layer --- computational fluid dynamics (CFD) --- OpenFOAM --- Micro-Electro-Mechanical Systems (MEMS) --- Nano-Electro-Mechanical Systems (NEMS) --- backward facing step --- gaseous rarefaction effects --- fractal surface topography --- modified Reynolds equation --- aerodynamic effect --- bearing characteristics --- underexpansion --- Fanno flow --- flow choking --- compressibility --- binary gas mixing --- micro-mixer --- DSMC --- splitter --- mixing length --- control mixture composition --- preconcentrator --- microfluidics --- miniaturized gas chromatograph --- BTEX --- PID detector --- ultraviolet light-emitting diode (UV LED) --- spectrophotometry --- UV absorption --- gas sensors --- Benzene, toluene, ethylbenzene and xylene (BTEX) --- toluene --- hollow core waveguides --- capillary tubes --- gas mixing --- pulsed flow --- modular micromixer --- multi-stage micromixer --- modelling --- photoionization detector --- microfluidics --- microfabrication --- volatile organic compound (VOC) detection --- toluene --- supersonic microjets --- Pitot tube --- Knudsen pump --- thermal transpiration --- vacuum micropump --- rarefied gas flow --- kinetic theory --- microfabrication --- photolithography --- microfluidics --- resonant micro-electromechanical-systems (MEMS) --- micro-mirrors --- out-of-plane comb actuation --- fluid damping --- analytical solution --- FE analysis --- miniaturization --- gas flows in micro scale --- measurement and control --- integrated micro sensors --- advanced measurement technologies --- n/a

Heat and Mass Transfer in Energy Systems

Authors: ---
ISBN: 9783039219827 9783039219834 Year: Pages: 234 DOI: 10.3390/books978-3-03921-983-4 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: General and Civil Engineering --- Technology (General)
Added to DOAB on : 2020-01-30 16:39:46
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In recent years, the interest of the scientific community towards efficient energy systems has significantly increased. One of the reasons is certainly related to the change in the temperature of the planet, which has increased by 0.76 °C with respect to preindustrial levels, according to the Intergovernmental Panel on Climate Change (IPCC), and is still increasing. The European Union considers it vital to prevent global warming from exceeding 2 °C with respect to pre-industrial levels, as it has been proven that this will result in irreversible and potentially catastrophic changes. These changes in climate are mainly caused by greenhouse gas emissions related to human activities, and can be drastically reduced by employing energy systems for the heating and cooling of buildings, as well as for power production, characterized by high efficiency levels and/or based on renewable energy sources. This Special Issue, published in the Energies journal, includes 13 contributions from across the world, including a wide range of applications such as hybrid residential renewable energy systems, desiccant-based air handling units, heat exchanges for engine WHR, solar chimney systems, and other interesting topics.

Keywords

bubble absorber --- absorption cooling --- ammonia-lithium nitrate --- plate heat exchanger --- bentonite buffer material --- Ca-type bentonite --- thermal conductivity --- predictive models --- thermosyphon --- two-phase flow --- startup --- phase change --- operating state --- visualization --- fast thermal simulation --- crude oil pipeline --- batch transportation --- body-fitted coordinate-based proper orthogonal decomposition reduced-order model (BFC-POD-ROM) --- transport scheme determination --- waste heat recovery --- exhaust steam --- heat exchanger --- protracted fin --- turbo-electric generator --- exhaust emissions --- R744 --- two-phase ejector --- refrigeration --- dynamic simulation --- low-order model --- object-oriented modelling --- desiccant wheel --- solar heating and cooling --- hygroscopic materials --- dynamic simulations --- energy and environmental analysis --- solar chimney --- air flow --- analytical and experimental solutions --- method of calculation --- steelmaking --- electric arc furnace --- consumption --- electric energy --- melting --- refining --- tapping --- modeling --- linear regression --- genetic programming --- renewables --- ancillary services --- hybrid systems --- thermal storage --- energy storage --- microgrids --- heat pump --- model predictive control --- optimization --- Biot number --- genetic algorithms --- drying --- air-cooled steam turbine generator --- single-channel ventilation --- backflow --- radial ventilation duct --- fluid field --- ground source heat pump --- numerical and experimental studies --- ground-air heat exchanger --- geothermal energy --- computational fluid dynamics --- spirally corrugated pipe

Organs-on-chips

Authors: ---
ISBN: 9783039289172 / 9783039289189 Year: Pages: 262 DOI: 10.3390/books978-3-03928-918-9 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2020-06-09 16:38:57
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Recent advances in microsystems technology and cell culture techniques have led to the development of organ-on-chip microdevices that produce tissue-level functionality, not possible with conventional culture models, by recapitulating natural tissue architecture and microenvironmental cues within microfluidic devices.

Keywords

microfluidics --- vascularization --- organ-on-a-chip --- vascularized tumor model --- tissue engineering --- microfluidic device --- cell culture --- organ-on-chips --- lung epithelial cell --- surfactant protein --- angiogenesis --- shear stress --- biomechanics --- vessel branching --- beating force --- bio-mechanical property --- cardiac 3D tissue --- human induced pluripotent Stem cell-derived cardiomyocytes (hiPS-CM) --- tissue engineering --- vacuum chuck --- barrier permeability --- epithelial–endothelial interface --- paracellular/transcellular transport --- organ-on-chip --- MEMS --- silicon --- PDMS --- membranes --- cell --- strain --- stress --- lattice light-sheet microscopy --- 3D cell culture system --- functional neuron imaging --- 3D cell culture --- neuronal cells --- SH-SY5Y cells --- image-based screening --- nanogrooves --- neuronal cell networks --- neuronal guidance --- drug metabolism --- biomimetic oxidation --- microfluidics --- organ-on-a-chip --- liver-on-a-chip --- liver-on-a-chip --- drug hepatotoxicity --- drug metabolism --- organoid --- 3D cell culture --- spheroid array --- high-throughput screening --- drug efficacy --- organ-on-a-chip (OOC) --- microfluidic device --- mechanical cue --- shear flow --- compression --- stretch --- strain --- syringe pump --- integrated pump --- passive delivery --- organs-on-chips --- microfluidics --- drug absorption --- fluoroelastomer --- ischemia/reperfusion injury --- thrombolysis --- organ-on-a-chip --- endothelial cell activation --- microfluidics --- microfabrication --- organ-on-a-chip --- trans-epithelial electrical resistance --- multi-culture --- n/a

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