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Beyond the Iron Age: The ecological relevance of bioactive trace metals other than Fe and organic growth factors in aquatic systems

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Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889195466 Year: Pages: 109 DOI: 10.3389/978-2-88919-546-6 Language: English
Publisher: Frontiers Media SA
Subject: Microbiology --- Science (General) --- Oceanography
Added to DOAB on : 2016-01-19 14:05:46
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In the last three decades, research has extensively focused on the role of Fe and other mineral nutrients in regulating biological processes, ranging from the surface to the deep ocean. This has produced major breakthroughs in our understanding of the fundamental role of those bioactive elements on the carbon, nitrogen and sulfur cycles and ecosystem function. However, biological processes cannot be entirely sustained by that small set of chemical elements, and new scientific evidence suggests that trace metals other than Fe (e.g., Co, Mo and Ni) as well as essential organic growth factors (e.g., vitamins) may also be crucial in most aquatic systems.

Multifunctional Oxide-Based Materials: From Synthesis to Application

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ISBN: 9783039213979 9783039213986 Year: Pages: 202 DOI: 10.3390/books978-3-03921-398-6 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Chemistry (General)
Added to DOAB on : 2019-12-09 11:49:15
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Advances in CAD/CAM/CAE Technologies

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ISBN: 9783039287406 / 9783039287413 Year: Pages: 116 DOI: 10.3390/books978-3-03928-741-3 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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CAD/CAM/CAE technologies find more and more applications in today’s industries, e.g., in the automotive, aerospace, and naval sectors. These technologies increase the productivity of engineers and researchers to a great extent, while at the same time allowing their research activities to achieve higher levels of performance. A number of difficult-to-perform design and manufacturing processes can be simulated using more methodologies available, i.e., experimental work combined with statistical tools (regression analysis, analysis of variance, Taguchi methodology, deep learning), finite element analysis applied early enough at the design cycle, CAD-based tools for design optimizations, CAM-based tools for machining optimizations.

Instruments and Methods for Cyclotron Produced Radioisotopes

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ISBN: 9783039282029 9783039282036 Year: Pages: 230 DOI: 10.3390/books978-3-03928-203-6 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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The focus of this Special Issue is aimed at enhancing the discussion of Engineering Education, particularly related to technological and professional learning. In the 21st century, students face a challenging demand: they are expected to have the best scientific expertise, but also highly developed social skills and qualities like teamwork, creativity, communication, or leadership. Even though students and teachers are becoming more aware of this necessity, there is still a gap between academic life and the professional world. In this Special Edition Book, the reader can find works tackling interesting topics such as educational resources addressing students’ development of competencies, the importance of final year projects linked to professional environments, and multicultural or interdisciplinary challenges.

Keywords

cyclotron --- PET --- titanium-45 --- unconventional radionuclides --- cyclotron --- targetry --- thermal study --- recycling of [18O]-water --- enrichment grade --- fractional distillation --- azeotropic mixtures --- molecular sieve desiccant --- 165Er --- 52Mn --- irradiation --- separation --- resin --- radiometals --- heavy Rare Earth Elements (hREE) --- liquid targets --- medical cyclotron --- radiometals --- gallium-68 --- copper-64 --- copper-61 --- purification --- disposable kit --- radiopharmaceuticals --- radionuclide production --- target stations --- targetry --- 70 MeV cyclotron --- beam energy --- ion accelerator --- medical cyclotron --- ion source --- filament --- cyclotron --- medical isotopes --- SPECT --- cyclotron --- medical radioisotope production --- radioactive impurities --- cross-section --- stacked-foils --- gamma spectroscopy --- thick target yield --- Radionuclide Yield Calculator --- cyclotron target --- carbon-11 --- recoil escape --- boron nitride nanotubes --- BNNTs --- cyclotrons --- radionuclide production --- solid, liquid and gas targets --- PET --- medical isotopes --- Ga-68 --- solid target --- radioisotopes --- medical radioisotopes --- radioisotope targetry --- solid radioisotope targets --- radioisotope target processing --- medical cyclotrons --- cyclotron --- targetry --- solid target --- metal 3D-printing --- target temperature --- radiometals --- radionuclides --- radioisotopes --- medical radioisotopes --- radioisotope targetry --- solid radioisotope targets --- radioisotope target processing --- medical cyclotrons --- PET --- medical isotopes --- solid target system --- radioisotope production --- Molybdenum-100 --- cyclotron --- molybdenum material recovery --- actinium-225 --- thorium --- spallation --- proton target --- ANSYS --- targeted alpha therapy --- cyclotron --- stack-foil --- monitor reaction --- cyclotron solid target --- radioisotope production --- magnetron sputtering --- thick film deposition --- cyclotron --- powder target --- thermal study --- vortex target --- Gallium-68 --- Technetium-99m --- medical Sc radioisotopes --- radioisotope production --- thick target yield measurements --- cross-section reconstruction --- numerical analysis --- cyclotrons --- targets --- target chemistry --- radioisotopes --- theranostics

Thin Films for Energy Harvesting, Conversion, and Storage

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ISBN: 9783039217243 9783039217250 Year: Pages: 174 DOI: 10.3390/books978-3-03921-725-0 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- Chemical Engineering
Added to DOAB on : 2019-12-09 11:49:16
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Efficient clean energy harvesting, conversion, and storage technologies are of immense importance for the sustainable development of human society. To this end, scientists have made significant advances in recent years regarding new materials and devices for improving the energy conversion efficiency for photovoltaics, thermoelectric generation, photoelectrochemical/electrolytic hydrogen generation, and rechargeable metal ion batteries. The aim of this Special Issue is to provide a platform for research scientists and engineers in these areas to demonstrate and exchange their latest research findings. This thematic topic undoubtedly represents an extremely important technological direction, covering materials processing, characterization, simulation, and performance evaluation of thin films used in energy harvesting, conversion, and storage.

High Precision X-Ray Measurements

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ISBN: 9783039213177 9783039213184 Year: Pages: 144 DOI: 10.3390/books978-3-03921-318-4 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Physics (General)
Added to DOAB on : 2019-12-09 16:10:12
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Since their discovery in 1895, the detection of X-rays has had a strong impact on and various applications in several fields of science and human life. Impressive efforts have been made to develop new types of detectors and new techniques, aiming to obtain higher precision both in terms of energy and position. Depending on the applications, solid state detectors, microcalorimeters, and various types of spectrometers currently serve as the best options for spectroscopic and imaging detectors. Recent advancements in micron and meV precision have opened the door for groundbreaking applications in fundamental physics, medical science, astrophysics, cultural heritage, and several other fields. The aim of this Special Issue is to compile an overview, from different communities and research fields, of the most recent developments in X-ray detection and their possible impacts in various sectors, such as in exotic atom measurements, quantum physics studies, XRF, XES, EXAFS, plasma emission spectroscopy, monochromators, synchrotron radiation, telescopes, and space engineering. All the papers included in this Special Issue contribute to emphasizing the importance of X-ray detection in a very broad range of physics topics; most of these topics are covered by the published works, and several others are mentioned in the paper references, providing an interesting and very useful synopsis, from a variety of different communities and research fields, of the most recent developments in X-ray detection and their impact in fundamental research and societal applications.

Graphene and Other 2D Layered Nanomaterial-Based Films: Synthesis, Properties and Applications

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ISBN: 9783039219025 9783039219032 Year: Pages: 138 DOI: 10.3390/books978-3-03921-903-2 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Chemistry (General) --- Organic Chemistry
Added to DOAB on : 2020-01-07 09:08:26
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This book is dedicated to highlighting some relevant advances in the field of thin films and coatings based on two-dimensional crystals and layered nanomaterials. Due to their layered structure, graphene and a variety of new 2D inorganic nanosystems, called “graphene analogues”, have all attracted tremendous interest due to their unprecedented properties/superior performance, and may find applications in many fields from electronics to biotechnology. These two-dimensional systems are ultrathin and, hence, tend to be flexible, also presenting distinctive and nearly intrinsic characteristics, including electronic, magnetic, optical, thermal conductivity, and superconducting properties. Furthermore, the combination of different structures and synergetic effects may open new and unprecedented perspectives, making these ideal advanced materials for multifunctional assembled systems. As far as the field of coatings is concerned, new layered nanostructures may offer unique and multifunctional properties, including gas barrier, lubricant, conductive, magnetic, photoactive, self-cleaning, and/or antimicrobial surfaces. This book contains new findings on the synthesis and perspectives of multifunctional films that are at the forefront of the science and coating technologies.

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
Added to DOAB on : 2020-04-07 23:07:08
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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.

Bainite and Martensite: Developments and Challenges

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ISBN: 9783039288571 / 9783039288588 Year: Pages: 166 DOI: 10.3390/books978-3-03928-858-8 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering --- Materials
Added to DOAB on : 2020-06-09 16:38:57
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The microstructures of both martensite and bainite, although sharing some common features, depict a plethora of subtle differences that made them unique when studied in further detail. Tailoring the final properties of a microstructure based on one or the other as well as in combination with others and exploring more sophisticated concepts, such as Q&P and nanostructured bainite, are the topics which are the focus of research around the world. In understanding the key microstructural parameters controlling the final properties as well as definition of adequate process parameters to attain the desired microstructures requires that a proper understanding of the mechanism ruling their transformation and a detailed characterization first be acheived. The development of new and powerful scientific techniques and equipment (EBSD, APT, HRTEM, etc.) allow us to gain fundamental insights that help to establish some of the principles by which those microstructures are known. The developments accompanying such findings lead to further developments and intensive research providing the required metallurgical support.

Keywords

medium-Mn steel --- austenite decomposition --- dilatometry --- phase equilibrium --- retained austenite --- high carbon steels --- nanobainite --- low temperature bainite --- tensile ductility --- retained austenite stability --- transformation induced plasticity (TRIP) --- microalloyed steels --- niobium --- molybdenum --- titanium --- mechanical properties --- yield strength --- impact toughness --- modeling --- microstructure --- EBSD --- bainite --- ausforming --- kinetics --- plate thickness --- steel --- martensite --- bainite --- Q&amp --- P --- synchrotron --- HEXRD --- TRIP --- low temperature bainite --- nitrocarburising --- surface modification --- retained austenite --- bainitic ferrite --- transmission electron microscopy --- creep resistant steels --- carbonitrides precipitation --- martensite --- tempering --- thermomechanical treatment --- ferritic/martensitic steel --- MX nanoprecipitates --- tempered martensite embrittlement --- lenticular martensite --- offshore steels --- electron backscattering diffraction --- Kernel average misorientation --- transmission Kikuchi diffraction --- ultrahigh strength steel --- austempering --- carbon partitioning --- carbide precipitation --- bainitic/martensitic ferrite --- stainless steel --- metastable austenite --- strain-induced martensite --- transformation kinetics --- inductive measurements --- martensitic steel --- direct quenched --- industrialization --- hot rolling --- tempering --- welding --- fatigue --- high strength steel --- tempering --- dilatation behavior --- phase transformation --- microstructure --- bainite --- martensite --- n/a

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