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Microwave Imaging and Electromagnetic Inverse Scattering Problems

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ISBN: 9783039219506 / 9783039219513 Year: Pages: 170 DOI: 10.3390/books978-3-03921-951-3 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
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Microwave imaging techniques allow for the development of systems that are able to inspect, identify, and characterize in a noninvasive fashion under different scenarios, ranging from biomedical to subsurface diagnostics as well as from surveillance and security applications to nondestructive evaluation. Such great opportunities, though, are actually severely limited by difficulties arising from the solution of the underlying inverse scattering problem. As a result, ongoing research efforts in this area are devoted to developing inversion strategies and experimental apparatus so that they are as reliable and accurate as possible with respect to reconstruction capabilities and resolution performance, respectively. The intent of this Special Issue is to present the experiences of leading scientists in the electromagnetic inverse scattering community, as well as to serve as an assessment tool for people who are new to the area of microwave imaging and electromagnetic inverse scattering problems.

Carbohydrates 2018

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ISBN: 9783039283163 9783039283170 Year: Pages: 172 DOI: 10.3390/books978-3-03928-317-0 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Chemistry (General) --- Science (General)
Added to DOAB on : 2020-04-07 23:07:09
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This book contains original papers and reviews on carbohydrate research in medicine, authored by participants of the 29th International Carbohydrate Symposium, where this topic had a special emphasis. The focus on biological events involving carbohydrates and glycoconjugates has delivered reliable approaches for disease treatment and diagnosis. Research on carbohydrate-based compounds for therapeutic applications is illustrated in various contributions, namely those covering the development of novel agents against Alzheimer’s disease, e.g. the neuroprotective C-glucosylated flavones and the isonucleoside-based cholinesterase inhibitors. New imino sugar glucosidase inhibitors are also disclosed, a class of compounds with potential for diabetes, Gaucher disease or cancer treatment. Also the development of a useful synthetic method towards multivalent glycoclusters of biomedical interest is here highlighted. The relevance of glycomimetics in drug discovery and the progress on carbohydrates in early diagnosis and cancer treatment are reviewed. Noteworthy is the chitosan-based delivery system for drug oral administration, a new biomaterial-based approach to improve bioavailability. Another study on the conformation of Streptococcus capsular polysaccharide backbones by molecular modelling provides useful information for bacterial immunotherapeutic approaches. All original contributions and reviews clearly demonstrate the potential of glycosciences for innovation in medicinal (glyco)chemistry and pharmaceutical research.

Biomass Processing for Biofuels, Bioenergy and Chemicals

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ISBN: 9783039289097 / 9783039289103 Year: Pages: 428 DOI: 10.3390/books978-3-03928-910-3 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
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Biomass can be used to produce renewable electricity, thermal energy, transportation fuels (biofuels), and high-value functional chemicals. As an energy source, biomass can be used either directly via combustion to produce heat or indirectly after it is converted to one of many forms of bioenergy and biofuel via thermochemical or biochemical pathways. The conversion of biomass can be achieved using various advanced methods, which are broadly classified into thermochemical conversion, biochemical conversion, electrochemical conversion, and so on. Advanced development technologies and processes are able to convert biomass into alternative energy sources in solid (e.g., charcoal, biochar, and RDF), liquid (biodiesel, algae biofuel, bioethanol, and pyrolysis and liquefaction bio-oils), and gaseous (e.g., biogas, syngas, and biohydrogen) forms. Because of the merits of biomass energy for environmental sustainability, biofuel and bioenergy technologies play a crucial role in renewable energy development and the replacement of chemicals by highly functional biomass. This book provides a comprehensive overview and in-depth technical research addressing recent progress in biomass conversion processes. It also covers studies on advanced techniques and methods for bioenergy and biofuel production.

Keywords

lignocellulose --- pretreatment --- hardwood --- extrusion --- enzymatic digestibility --- bioethanol --- renewable energy --- biofuel --- environment --- technology development --- co-combustion --- sewage sludge --- thermogravimetric analysis --- Fourier transform infrared spectroscopy --- synergistic effect --- single-pellet combustion --- biodiesel --- fatty acid methyl ester --- free fatty acids --- oxidation stability --- antioxidant --- hydrogen --- coffee mucilage --- organic wastes --- dark fermentation --- anaerobic digestion --- biodiesel --- bio-jet fuel --- triacylglycerides --- Fatty Acid Methyl Ester --- lipids --- hydrodeoxygenation --- drop-in fuel --- rubber seed oil --- biodiesel production --- nanomagnetic catalyst --- subcritical methanol --- FAME yield --- Box-Behnken design --- GCI --- biodiesel --- diesel --- combustion --- emission --- renewable energy --- microwave --- free fatty acid --- crude oil --- renewable energy --- biomass --- waste --- black soldier fly larvae (BSFL) --- instar --- lipid --- fatty acid methyl ester (FAME) --- fermentation --- Rancimat method --- butylated hydroxyanisole --- tert-butylhydroquinone --- fatty acid methyl esters --- viscosity --- response surface --- anaerobic treatment --- biogas --- kinetic study --- potato peels --- cow manure --- thermophilic --- mesophilic --- palm oil mill effluent --- acclimatization --- direct carbon fuel cell --- biochar --- pyrolysis --- power density --- pre-treatment --- post-treatment --- combustion characteristics --- injection strategies --- compression ratio --- intake temperature --- torrefaction --- vacuum --- biomass pretreatment --- bioenergy --- energy yield --- biochar --- rice straw --- rice husk --- power generation --- gasification --- alternative fuel --- Rhus typhina biodiesel --- non-edible oil --- base-catalyzed transesterification --- Physico-chemical properties --- concentration polarization --- draw solution --- feed solution --- forward osmosis --- pressure-retarded osmosis --- operating conditions --- membrane fouling --- osmotic membrane --- bioenergy --- biofuel --- nanotechnology --- nano-catalysts --- nano-additives --- crude glycerol --- glycerol carbonate --- dimethyl carbonate --- microwave irradiation --- reaction kinetics

Organophosphorus Chemistry 2018

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ISBN: 9783039282364 9783039282371 Year: Pages: 601 DOI: 10.3390/books978-3-03928-237-1 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Chemistry (General) --- Organic Chemistry
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Organophosphorus chemistry is an important discipline within organic chemistry. Phosphorus compounds, such as phosphines, trialkyl phosphites, phosphine oxides (chalcogenides), phosphonates, phosphinates and >P(O)H species, etc., may be important starting materials or intermediates in syntheses. Let us mention the Wittig reaction and the related transformations, the Arbuzov- and the Pudovik reactions, the Kabachnik–Fields condensation, the Hirao reaction, the Mitsunobu reaction, etc. Other reactions, e.g., homogeneous catalytic transformations or C-C coupling reactions involve P-ligands in transition metal (Pt, Pd, etc.) complex catalysts. The synthesis of chiral organophosphorus compounds means a continuous challenge. Methods have been elaborated for the resolution of tertiary phosphine oxides and for stereoselective organophosphorus transformations. P-heterocyclic compounds, including aromatic and bridged derivatives, P-functionalized macrocycles, dendrimers and low coordinated P-fragments, are also of interest. An important segment of organophosphorus chemistry is the pool of biologically-active compounds that are searched and used as drugs, or as plant-protecting agents. The natural analogue of P-compounds may also be mentioned. Many new phosphine oxides, phosphinates, phosphonates and phosphoric esters have been described, which may find application on a broad scale. Phase transfer catalysis, ionic liquids and detergents also have connections to phosphorus chemistry. Green chemical aspects of organophosphorus chemistry (e.g., microwave-assisted syntheses, solvent-free accomplishments, optimizations, and atom-efficient syntheses) represent a dynamically developing field. Last, but not least, theoretical approaches and computational chemistry are also a strong sub-discipline within organophosphorus chemistry.

Catalysis by Precious Metals, Past and Future

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ISBN: 9783039287222 / 9783039287239 Year: Pages: 204 DOI: 10.3390/books978-3-03928-723-9 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Chemistry (General) --- Inorganic Chemistry
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The future of the precious metals is shiny and resistant. Although expensive and potentially replaceable by transition metal catalysts, precious metal implementation in research and industry shows potential. These metals catalyze oxidation and hydrogenation due to their dissociative behavior toward hydrogen and oxygen, dehydrogenation, isomerization, and aromatization, etc. The precious metal catalysts, especially platinum-based catalysts, are involved in a variety of industrial processes. Examples include Pt–Rh gauze for nitric acid production, the Pt/Al2O3 catalyst for cyclohexane and propylene production, and Pd/Al2O3 catalysts for petrochemical hydropurification reactions, etc. A quick search of the number of published articles in the last five years containing a combination of corresponding “metals” (Pt, Pd, Ru, Rh and Au) and “catalysts” as keywords indicates the importance of the Pt catalysts, but also the continuous increase in the contribution of Pd and Au. This Special Issue reveals the importance of precious metals in catalysis and focuses on mono- and bi-metallic formulations of any supported precious metals and their promotional catalytic effect of other transition metals. The application of precious metals in diverse reactions, either homogeneous or heterogeneous, and studies of the preparation, characterization, and applications of the supported precious metal catalysts, are presented.

Polyphenolic Antioxidants from Agri-Food Waste Biomass

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ISBN: 9783039286744 / 9783039286751 Year: Pages: 168 DOI: 10.3390/books978-3-03928-675-1 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Biology --- Nutrition and Food Sciences
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The re-use of industrial food residues is essential in the general framework of rational waste handling and recycling, which aims at the minimizing environmental impact of food production and producing functional food ingredients. Agri-food processing waste has long been considered a valuable biomass with a significant polyphenol load and profile. Polyphenols, aside from being powerful antioxidants that confer inherent stability to a variety of foods, may possess versatile bioactivities including anti-inflammatory and chemopreventive properties. The valorization of agri-food waste as a prominent source of polyphenols stems from the enormous amount of food-related material discharged worldwide and the emerging eco-friendly technologies that allow high recovery, recycling, and sustainable use of these materials. This book addresses the concept of recovering natural polyphenolic antioxidants from waste biomass generated by agri-food and related industrial processes and presents state-of-the-art applications with prospect in the food, cosmetic, and pharmaceutical industries.

Spectral Line Shapes in Astrophysics and Related Topics

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ISBN: 9783039281688 9783039281695 Year: Pages: 268 DOI: 10.3390/books978-3-03928-169-5 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Physics (General) --- Astronomy (General)
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Spectral lines, widths, and shapes are powerful tools for emitting/absorbing gas diagnostics in different astrophysical objects (from the solar system to the most distant objects in the universe—quasars). On the other hand, experimental and theoretical investigations of laboratory plasma have been applied in spectroscopic astrophysical research, especially in research on atomic data needed for line shape calculations. Data on spectral lines and their profiles are also important for diagnostics, analysis, and the modelling of fusion plasma, laser-produced plasma, laser design and development, and various plasmas in industry and technology, like light sources based on plasmas or the welding and piercing of metals by laser-produced plasma. The papers from this book can be divided into four groups: 1. stark broadening data for astrophysical and laboratory plasma investigations; 2. applications of spectral lines for astrophysical and laboratory plasma research; 3. spectral line phenomena in extragalactic objects, and 4. laboratory astrophysics results for spectra investigation. The reviews and research papers, representing new research on the topics presented in this book, are of interest for specialists and PhD students. We hope that the present book will be useful and interesting for scientists interested in the investigation of spectral line shapes and will contribute to the education of young researchers and PhD students.

Keywords

stark broadening --- atomic data --- subdwarfs B stars --- Ar II --- stark broadening --- atomic data --- atomic processes --- line profiles --- Ar VII --- stark broadening --- line profiles --- atomic data --- Na IV --- atomic/molecular data --- radiative and collisional processes --- stars --- stark broadening --- impact approximation --- numerical simulation --- ionization processes --- emission line formation --- atomic spectroscopy --- supermassive black holes --- emission line profiles --- quasars --- line shape --- wave collapse --- electric field solitons --- plasma turbulence --- line shapes --- stark broadening --- neutral broadening --- corona discharge --- line shapes --- Stark broadening --- Zeeman effect --- tokamaks --- white dwarfs --- active galaxies --- BL Lacertae objects --- AO 0235+164 --- photometry --- polarimetry --- plasma spectroscopy --- microwave discharges --- gas temperature --- stark broadening parameters --- atomic emission spectroscopy --- laboratory plasma --- spectra --- line profiles --- astrophysical plasmas --- inner plasma electrostatic screening --- different charged ions --- stars --- galaxies: active --- galaxies: nuclei --- line: profiles --- quasars: emission lines --- catalogs --- surveys --- line shapes --- Stark broadening --- Zeeman effect --- white dwarfs --- QSO samples --- QSO selection --- medium-band photometry --- electron scattering --- cross sections --- Rosetta mission --- atomic and molecular databases --- Stark broadening --- line profiles --- atomic data --- spectroscopy --- alkali atoms --- astrophysics --- atomic processes --- molecular processes --- radiative transfer --- absorption quasi-molecular bands --- sun:atmosphere --- sun:photosphere --- stars:atmospheres --- white dwarfs --- atomic processes --- radiative transfer --- Sun: atmosphere --- Sun: photosphere --- stars: atmospheres --- white dwarfs --- Stark effect --- electron broadening --- Lienard-Wiechert --- retarded interaction --- relativistic collision operator --- Stark broadening --- line profiles --- atomic data --- plasmas --- Maxwell --- Juttner-Maxwell --- relativistic --- Doppler effect --- asymmetry --- Stark broadening --- Ar VII line profiles --- stars --- white dwarfs --- atomic data --- scattering

Foods of Plant Origin

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ISBN: 9783039285662 / 9783039285679 Year: Pages: 204 DOI: 10.3390/books978-3-03928-567-9 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Biology --- Nutrition and Food Sciences
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It is now well accepted that the consumption of plant-based foods is beneficial to human health. Fruits, vegetables, grains, and derived products can be excellent sources of minerals, vitamins, and fiber and usually have a favorable nutrient-to-energy ratio. Furthermore, plant foods are also a rich source of phytochemicals such as polyphenols, carotenoids, and betalains, with potential health benefits for humans. Many epidemiological studies have made a direct link between the consumption of plant foods and health. Human intervention studies have also shown that higher intake/consumption of plant foods can reduce the incidence of metabolic syndrome and other chronic diseases, especially in at-risk populations such as obese people. In addition to its health benefits, plant foods are also used as functional ingredients in food applications such as antioxidants, antimicrobials, and natural colorants. The Special Issue “Foods of Plant Origin” covers biodiscovery, functionality, the effect of different cooking/preparation methods on bioactive (plant food) ingredients, and strategies to improve the nutritional quality of plant foods by adding other food components using novel/alternative food sources or applying non-conventional preparation techniques.

Keywords

functional properties --- orange fleshed sweet potato --- vitamin A --- porridge --- skimmed milk --- durian --- esters --- thioacetals --- thioesters --- volatile compounds --- polyphenols --- propionate --- ‘Ma’afala’ --- Artocarpus altilis --- gluten-free pasta --- underutilized crop --- value-added product --- indigenous crop cultivar --- Cassava --- gari --- retention --- beta-carotene --- vitamin A intake --- Brassica --- stir-frying --- steaming --- boiling --- HPLC-DAD-ESI-MS/MS --- UHPLC-QqQ-MS/MS --- sulforaphane --- iberin --- Kakadu plum --- Terminalia ferdinandiana --- antioxidants --- antimicrobial activity --- food preservation --- phytochemicals --- polyphenols --- Australian grown garlic --- Allium sativum L. --- polyphenols --- organosulfur compounds --- antioxidant capacity --- antimicrobial activity --- photo technology --- shelf life --- Capsicum annuum L. --- postharvest quality --- bioactive compounds --- antioxidant activity --- folate --- tropical fruits --- subtropical fruits --- vegetables --- indigenous food --- stable isotope dilution assay --- LC-MS/MS --- Acca sellowiana --- feijoa fruit --- proximate composition --- polyphenols --- vitamins --- minerals --- antimicrobial activity --- Chenopodium quinoa --- bakery products --- DRIs/DRVs (Dietary Reference Intakes/Dietary Reference Values) and AI (Adequate Intake) --- FAO (Food and Agriculture Organization) --- EFSA (European Food Safety Authority) --- protein quality --- polyunsaturated fatty acids --- dietary fibre --- mineral availability --- glycaemic index estimation --- Solanum tuberosum L. --- starch --- digestibility --- freeze-drying --- microwave vacuum drying --- conductive hydro-drying --- instant controlled pressure drop --- processing --- Brassica vegetables --- bioactive compounds --- postharvest processing --- kaempferol --- sinigrin --- plant food --- composition --- nutrients --- vitamins --- phytochemicals --- fibre --- processing --- preservation --- functional properties --- health

Sustainable Utilization of Metals: Processing, Recovery and Recycling

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ISBN: 9783039288854 / 9783039288861 Year: Pages: 388 DOI: 10.3390/books978-3-03928-886-1 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- Economics
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The high demand for advanced metallic materials raises the need for an extensive recycling of metals and such a sustainable use of raw materials. ""Sustainable Utilization of Metals - Processing, Recovery and Recycling"" comprises the latest scientific achievements in efficient production of metals and such addresses sustainable resource use as part of the circular economy strategy. This policy drives the present contributions, aiming on the recirculation of EoL-streams such as Waste Electric and Electronic Equipment (WEEE), multi-metal alloys or composite materials back into metal production. This needs a holistic approach, resulting in the maximal avoidance of waste. Considering both aspects, circular economy and material design, recovery and use of minor metals play an essential role, since their importance for technological applications often goes along with a lack of supply on the world market. Additionally, their ignoble character and low concentration in recycling materials cause an insufficient recycling rate of these metals, awarding them the status of “critical metals”. In order to minimize losses and energy consumption, this issue explores concepts for the optimization concerning the interface between mechanical and thermal pre-treatment and metallurgical processes. Such new approaches in material design, structural engineering and substitution are provided in the chapters.

Keywords

laterites --- scandium --- leaching --- precipitation --- solvent extraction --- manganese --- Zinc --- electrolytic lodes and scrapings --- electrolytic manganese --- metallurgy --- hydrometallurgy --- recycling --- sustainable development --- recycling --- spent catalysts --- zinc --- copper --- Bayan Obo --- REE–Nb–Fe ore --- carbothermal reduction --- kinetics --- NMC batteries --- recycling --- leaching --- solvent extraction --- selective precipitation --- hydrometallurgy --- Bayer process --- trace elements --- vanadium --- gallium --- rare earth elements --- lanthanum --- yttrium --- scandium --- karst bauxite --- bauxite residue --- red mud --- indium --- silver --- jarosite --- recycling --- industrial residue --- process development --- selective extraction --- simultaneous recovery --- pyrometallurgy --- lifetime of steel --- steel scrap --- circulation --- industry sector --- dynamic material flow model --- recycling rate --- material flow analysis --- gold --- copper --- WPCBs --- leaching --- physical separation --- Tin recovery --- steelmaking dust --- zinc recycling --- alkaline leaching --- electric arc furnace --- Li-ion battery --- recycling --- pyrolysis --- microwave assisted pyrolysis --- battery pre-treatment --- super-gravity --- rheorefining --- aluminum alloy --- tramp element --- separation --- jarosite residue --- pyrometallurgy --- circular economy --- slag valorization --- metal recovery --- closed-loop circulation --- environmentally friendly process --- enrichment of Ti --- preparation for recovery --- reduction of Co --- precipitation --- thermal treatment --- hydrometallurgy --- recycling --- cold-bonded briquettes --- blast furnace --- desulfurization --- basic oxygen furnace --- dust --- sludge --- fines --- scandium --- anti-solvent crystallization --- solvent extraction --- precipitation --- ammonium scandium hexafluoride --- chemical equilibrium diagram --- aluminium purification --- iron removal --- intermetallic formation --- polythermal section --- cerium --- flotation --- glass polishing waste --- gravity separation --- leaching --- precipitation --- rare-earths --- recycling --- reuse --- solvent extraction --- neodymium --- dimethyl sulfoxide --- electrodeposition --- bauxite residue --- red mud --- ionic liquids --- scandium recovery --- titanium recovery --- NdFeB magnets --- rare earth elements --- recycling --- recycling potential --- neodymium --- dysprosium --- WPCB --- melting behavior --- flash smelting --- cementation --- copper removal --- cavitation --- pyrolysis --- smartphone --- displays --- halogenation --- indium --- volatilization --- thermodynamics --- recycling --- magnesium --- refining --- recycling --- ultra-high purity --- vacuum distillation --- condensation --- oxygen-depolarized cathodes --- silver leaching --- cryogenic pre-treatment --- negative activation energy --- polishing waste --- rare earths --- waste utilization --- characterization --- leaching --- n/a

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MDPI - Multidisciplinary Digital Publishing Institute (9)


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eng (6)

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2020 (9)