Listing 1 - 10 of 83 | << page >> |
Sort by
|
Choose an application
Apatite-type minerals and their synthetic analogues are of interest of many industrial branches and scientific disciplines including material sciences, chemical industry, agriculture, geology, medicine and dentistry. This book provides a basic overview of general knowledges of this topic in order to provide the comprehensive survey from a scientific and technological perspective. The book is divided into 10 chapters, which are devoted to the structure and properties of minerals from the supergroup of apatite, experimental techniques of preparation and characterization of synthetic analogues of apatite minerals, substitution in the structure of apatite as well as utilization of these materials in wide range of common and special advanced applications in industry, material sciences and research. Additionally, the phosphate rocks, their classification, geological role, mining and beneficiation of phosphate ore, production of elemental phosphorus, phosphoric acid and fertilizers are also described. Although this book is meant for chemist, material scientist and research engineers, the individual chapters contain theoretical background, historical aspects as well as examples of synthetic and analytical methods which may be also interesting for students and non-expert readers as well.
Apatite. --- Phosphate minerals --- Physical Sciences --- Engineering and Technology --- Chemistry --- Inorganic Chemistry --- Solid-State Chemistry
Choose an application
Obesity and its co-morbidities, including atherosclerosis, insulin resistance and diabetes, are a world-wide epidemic. Inflammatory immune responses in metabolic tissues have emerged as a universal feature of these metabolic disorders. While initial work highlighted the contribution of macrophages to tissue inflammation and insulin resistance, recent studies demonstrate that cells of the adaptive immune compartment, including T and B lymphocytes and dendritic cells also participate in obesity-induced pathogenesis of these conditions. However, the molecular and cellular pathways by which the innate and adaptive branches of immunity control tissue and systemic metabolism remain poorly understood. To engage in growth and activation, cells need to increase their biomass and replicate their genome. This process presents a substantial bioenergetic challenge: growing and activated cells must increase ATP production and acquire or synthesize raw materials, including lipids, proteins and nucleic acids. To do so, they actively reprogram their intracellular metabolism from catabolic mitochondrial oxidative phosphorylation to glycolysis and other anabolic pathways. This metabolic reprogramming is under the control of specific signal transduction pathways whose underlying molecular mechanisms and relevance to physiology and disease are subject of considerable current interest and under intense study. Recent reports have elucidated the physiological role of metabolic reprogramming in macrophage and T cell activation and differentiation, B- and dendritic cell biology, as well as in the crosstalk of immune cells with endothelial and stem cells. It is also becoming increasingly evident that alterations of metabolic pathways play a major role in the pathogenesis of chronic inflammatory disorders. Due to the scientific distance between immunologists and experts in metabolism (e.g., clinicians and biochemists), however, there has been limited cross-talk between these communities. This collection of articles aims at promoting such cross-talk and accelerating discoveries in the emerging field of immunometabolism.
metabolic syndrome --- Obesity --- Immunometabolism --- TCA cycle --- Glycolysis --- macrophage --- Inflammation --- fatty acid oxidation --- Pentose Phosphate Pathway --- lymphocyte
Choose an application
Terrestrial plants are sessile organisms that, differently from animals, can not move in searching of the nutrients and water they need. Instead, they have to change continuously their physiology and morphology to adapt to the environmental changes. When plants suffer from a nutrient deficiency, they develop physiological and morphological responses (mainly in their roots) aimed to facilitate the acquisition and mobilization of such a nutrient. Physiological responses include some ones like acidification of the rizhosphere and release of chelating agents into the medium; and morphological responses include others, like changes in root architecture and development of root hairs. The regulation of these responses is not totally known but in the last years different plant hormones and signaling substances, such as auxin, ethylene, cytokinins and nitric oxide, have been involved in their control. Besides hormones, oxidative stress has also been related with most of the nutrient deficiencies. The relationship of ethylene with the regulation of responses to nutrient deficiencies came from the nineties, when some works presented data suggesting its involvement in the regulation of responses to Fe and P deficiency. In the last years, the role of ethylene has been extended to many other nutrient deficiencies, such as K deficiency, Mg deficiency, S deficiency, N deficiency, and others. In most of the cases, it has been found that ethylene production, as well as the expression of ethylene synthesis genes, increases under these nutrient deficiencies. Furthermore, it has also been found that ethylene controls the expression of genes related to responses to different deficiencies. The involvement of ethylene in so many deficiencies suggests that it should act in conjunction with other signals that would confer nutrient-specificity to the distinct nutrient responses. These other signals could be plant hormones (auxin, cytokinins, etc) as well as other substances (nitric oxide, microRNAs, peptides, glutathione, etc), either originated in the roots or coming from the shoots through the phloem. The role of ethylene in the mineral nutrition of plants is even more complex that the one related to its role in the responses to nutrient deficiencies. Ethylene has also been implicated in the N2 fixation of legume plants; in salt tolerance responses; and in responses to heavy metals, such as Cd toxicity. All these processes are related to ion uptake and, consequently, are related to plant mineral nutrition. We consider a good opportunity to review all this information in a coordinated way. This Research Topic will provide an overview about the role of the plant hormone ethylene on the regulation of physiological and morphological responses to different nutrient deficiencies. In addition, it will cover other aspects of ethylene related to plant nutrition such as its role on salinity, N2 fixation and tolerance to heavy metals.
Boron --- heavy metals --- Phosphate --- Iron --- nodulation --- Nitrogen --- Sulfur --- ethylene --- Potassium --- Salinity
Choose an application
Although sphingolipids are ubiquitous components of cellular membranes, their abundance in cells is generally lower than glycerolipids or cholesterol, representing less than 20% of total lipid mass. Following their discovery in the brain—which contains the largest amounts of sphingolipids in the body—and first description in 1884 by J.L.W. Thudichum, sphingolipids have been overlooked for almost a century, perhaps due to their complexity and enigmatic nature. When sphingolipidoses were discovered, a series of inherited diseases caused by enzyme mutations involved in sphingolipid degradation returned to the limelight. The essential breakthrough came decades later, in the 1990s, with the discovery that sphingolipids were not just structural elements of cellular membranes but intra- and extracellular signaling molecules. It turned out that their lipid backbones, including ceramide and sphingosine-1-phosphate, had selective physiological functions. Thus, sphingolipids emerged as essential players in several pathologies including cancer, diabetes, neurodegenerative disorders, and autoimmune diseases. The present volume reflects upon the unexpectedly eclectic functions of sphingolipids in health, disease, and therapy. This fascinating lipid class will continue to be the subject of up-and-coming future discoveries, especially with regard to new therapeutic strategies.
S1P receptor --- inflammation --- S1P transporter --- spinster homolog 2 --- barrier dysfunction --- anxiety --- depression --- sphingolipids --- sphingomyelinase --- ceramidase --- Smpd1 --- acid sphingomyelinase --- forebrain --- depressive-like behavior --- anxiety-like behavior --- ceramide --- ceramides --- ceramidases --- neurodegenerative diseases --- infectious diseases --- sphingosine 1-phoshate --- sphingosine 1-phosphate receptor --- S1P1–5 --- sphingosine 1-phosphate metabolism --- sphingosine 1-phosphate antagonistst/inhibitors --- sphingosine 1-phosphate signaling --- stroke --- multiple sclerosis --- neurodegeneration --- fingolimod --- Sphingosine-1-phosphate --- obesity --- type 2 diabetes --- insulin resistance --- pancreatic β cell fate --- hypothalamus --- sphingosine-1-phosphate --- ischemia/reperfusion --- cardioprotection --- vasoconstriction --- coronary flow --- myocardial function --- myocardial infarct --- albumin --- type 1 diabetes --- beta-cells --- islets --- insulin --- cytokines --- S1P --- animal models --- cystic fibrosis --- autophagy --- myriocin --- Aspergillus fumigatus --- CLN3 disease --- Cln3Δex7/8 mice --- flupirtine --- allyl carbamate derivative --- apoptosis --- cancer --- gangliosides --- immunotherapy --- metastasis --- phenotype switching --- sphingosine 1-phosphate --- Sphingosine 1-phosphate (S1P) --- S1P-lyase (SGPL1) --- tau --- calcium --- histone acetylation --- hippocampus --- cortex --- astrocytes --- neurons --- sphingosine kinase --- G-protein-coupled receptors --- Gαq/11 --- n/a --- sphingosine kinase 1 --- SK1 --- microRNA --- transcription factor --- hypoxia --- long non-coding RNA --- S1P1-5
Choose an application
The goal of this book is to provide readers with a broad appraisal of topics in global advancements in theoretical and experimental facts, and practical applications of nano-HAp materials based on their synthesis, properties, prospects, and potential biomedical treatments. The perspective of this book involves the preparation of crystalline nano-HAP materials including preferential orientation, various properties and new prospects in biomimetics, bone tissue infections, biomedical implants, regenerative medicinal treatments and a wide range of technological applications. This book is categorized into two main sections: Hydroxyapatite: synthesis, properties, perspectives, and prospects; and the application of hydroxyapatite: a synergistic outlook. Individual chapters provide a base for a wide range of readers from diversified fields, including students and researchers, who will find in this book simply explained basics as well as advanced techniques of specific subjects related to these phenomena. The book is made up of nine contributions, compiled by experts from wide-ranging fields involved in biomaterials/materials in science and technology from over 15 research institutes across the globe.
Hydroxyapatite. --- Chemistry, Inorganic. --- Inorganic chemistry --- Chemistry --- Inorganic compounds --- Calcium phosphate hydroxide --- Hydroxylapatite --- Apatite --- Physical Sciences --- Engineering and Technology --- Bioinorganic Chemistry --- Inorganic Chemistry
Choose an application
Coatings based on hydroxyapatite and calcium phosphates have a significant relevance in several research fields, such as biomaterials, cultural heritage, and water treatment, due to their characteristic properties. Hydroxyapatite can easily accommodate foreign ions, which can either be incorporated into the lattice, thanks to its specific lattice characteristics, or be adsorbed onto its surface. All these substitutions significantly alter the morphology, lattice parameters, and crystallinity of hydroxyapatite so they influence its main properties. These ion substitutions can be sought or can derive from substrate contaminations, which is an important aspect to be evaluated. Finally, this capability can be used to obtain hydroxyapatites with specific properties, such as antibacterial characteristics, among others. For these reasons, the aim of this Special Issue is to document current advances in the field of ion-substituted hydroxyapatites and highlight possible future perspectives regarding their use. Contributions in the form of original articles and review articles are presented, covering different areas of application.
calcium phosphates --- ion-substituted apatites --- bone regeneration --- plasma-assisted deposition --- solubility --- crystallinity --- composition --- lithium-doped hydroxyapatite coatings --- renewable resources for implant coatings --- pulsed laser deposition --- biocompatibility --- inhibition of microbial biofilms development --- zinc --- hydroxyapatite --- ultrasound measurement --- sol–gel spin coating --- layers --- C. albicans --- S. aureus --- calcium phosphate --- magnesium phosphate --- struvite --- dolomite --- consolidating treatment --- cultural heritage --- ammonium phosphate --- marble --- calcite --- dissolution --- electrodeposition --- protective coatings --- acid attack --- potential --- current --- RF magnetron sputtering --- GLAD --- carbonated hydroxyapatite --- nanomaterials --- coatings --- cave painting --- inorganic consolidant --- ethyl silicate --- TEOS --- non-thermal plasma --- wettability --- bone --- allograft --- autograft --- xenograft --- ion-substituted calcium phosphates --- nanostructured coatings
Choose an application
Biopolymers including natural (e.g., polysaccharides, proteins, gums, natural rubbers, bacterial polymers), synthetic (e.g., aliphatic polyesters and polyphosphoester), and biocomposites are of paramount interest in regenerative medicine, due to their availability, processability, and low toxicity. Moreover, the structuration of biopolymer-based materials at the nano- and microscale along with their chemical properties are crucial in the engineering of advanced carriers for drug products. Finally, combination products including or based on biopolymers for controlled drug release offer a powerful solution to improve the tissue integration and biological response of these materials. Understanding the drug delivery mechanisms, efficiency, and toxicity of such systems may be useful for regenerative medicine and pharmaceutical technology. The main aim of the Special Issue on “Biopolymers in Drug Delivery and Regenerative Medicine” is to gather recent findings and current advances on biopolymer research for biomedical applications, particularly in regenerative medicine, wound healing, and drug delivery. Contributions to this issue can be as original research or review articles and may cover all aspects of biopolymer research, ranging from the chemical synthesis and characterization of modified biopolymers, their processing in different morphologies and hierarchical structures, as well as their assessment for biomedical uses.
curcumin --- pectin aerogels --- chitosan coating --- burst release --- controlled release --- Keratose --- drug-coated balloon --- paclitaxel --- drug delivery --- pre-clinical --- peripheral arterial disease --- endovascular --- cellulose phosphate --- cellulose phosphate aerogel --- interconnected porosity --- supercritical carbon dioxide --- tetrabutylammonium fluoride --- TBAF/DMSO --- polysaccharide --- κ-carrageenan --- dexamethasone --- electrochemical active deliver system --- doping agent --- charged molecule --- conductive polymers --- colorectal cancer --- antioxidants --- 5-fluorouracil --- polymer nanomaterials --- nanocapsules --- chemotherapy --- cryogel --- starch --- NMR spectroscopy --- morphology --- drug release --- polysaccharides --- hydrogels --- prilling --- droplets --- ionotropic gelation --- drying --- xerogels --- cryogels --- aerogels --- lipid microparticles --- PGSS® --- supercritical CO2 --- modeling --- solvent-free technology --- biomaterials --- porous materials --- biomimetic --- multi-stimulation --- tissue engineering --- n/a
Choose an application
Despite its limitation in terms of surface covered area, the PLD technique still gathers interest among researchers by offering endless possibilities for tuning thin film composition and enhancing their properties of interest due to: (i) the easiness of a stoichiometric transfer even for very complex target materials, (ii) high adherence of the deposited structures to the substrate, (iii) controlled degree of phase, crystallinity, and thickness of deposited coatings, (iv) versatility of the experimental set-up which allows for simultaneous ablation of multiple targets resulting in combinatorial maps or consecutive ablation of multiple targets producing multi-layered structures, and (v) adjustment of the number of laser pulses, resulting in either a spread of nanoparticles, islands of materials or a complete covering of a surface. Moreover, a variation of PLD, known as Matrix Assisted Pulsed Laser Evaporation, allows for deposition of organic materials, ranging from polymers to proteins and even living cells, otherwise difficult to transfer unaltered in the form of thin films by other techniques. Furthermore, the use of laser light as transfer agent ensures purity of films and pulse-to-pulse deposition allows for an unprecedented control of film thickness at the nm level. This Special Issue is a collection of state-of-the art research papers and reviews in which the topics of interest are devoted to thin film synthesis by PLD and MAPLE, for numerous research and industry field applications, such as bio-active coatings for medical implants and hard, protective coatings for cutting and drilling tools withstanding high friction and elevated temperatures, sensors, solar cells, lithography, magnetic devices, energy-storage and conversion devices, controlled drug delivery and in situ microstructuring for boosting of surface properties.
thin films --- matrix-assisted pulsed laser evaporation --- shellac --- enteric coatings --- PLD --- ITO --- nanoimprint lithography --- coatings --- nanostructure --- iron oxide --- pulsed laser deposition --- aluminum nitride --- nanoindentation testing --- TEM imaging --- FTIR spectroscopy --- ellipsometry --- complex refractive index --- composite coatings --- MAPLE --- Lactoferrin --- macrophage interactions --- animal-origin calcium phosphate coatings --- natural hydroxyapatite --- doping --- high adherence --- pulsed laser deposition technique --- biomimetic applications --- target preparation --- room temperature ferromagnetism --- dilute magnetic semiconductor --- Indium oxide --- (InFe)2O3 --- PLD films --- energy storage --- thin-film electrodes --- thin-film solid electrolyte --- lithium microbatteries --- calcium phosphate-based coatings --- synthetic and natural hydroxyapatite --- in vivo testing --- biomedical applications --- n/a
Choose an application
The book contains research articles and reviews recently published online for the MDPI journal Diversity, in the Special Issue "Genetic diversity of soil bacterial communities". The issue aimed to collect up to date information from the international scientific community to get insight in the "black box", as soil has been defined in the last decades, focusing in detail on the role that the microbial communities have in soil processes such as carbon and nutrient fluxes and on their genetic and functional diversity. The book meets the interests of scientific communities directly involved in the topics investigated, as well as of PhD students, scholars, professional organizations interested in improving their knowledge on a group of organisms considered vitally important to the maintenance and sustainability of the biosphere, where soil has a key role as an important natural resource.
bacterial community structure --- biological fertility index --- land use --- microbial biomass --- microbial respiration --- ribosomal RNA copy numbers --- sweet potato --- bacterial communities --- nitrogen fixation --- phosphate mineralization --- plant genotype --- bacteria --- diversity --- operational taxonomic unit (OTU) --- enzymes activity --- biological nitrogen fixation --- nitrogen --- Leucaena leucocephala --- Acacia mangium --- Gliricidia sepium --- Clitoria fairchildiana --- fodder grasses --- lawn grasses --- soil bacteria --- soil enzymes --- soil bacteria diversity --- bacteriobiome --- soil fertility
Choose an application
The book represents a collection of papers from Special Issue “Formation of Advanced Nanomaterials by Gas-Phase Aggregation” published in journal Applied Nano. It contains review and original articles covering a range of topics on the growth of clusters/nanoparticles using gas-phase aggregation approaches, the application of cluster beams for the formation of nanomaterials with advanced properties and specific nanostructures as well as providing new fundamental insights on nanoscale properties of materials.
silver nanoparticles --- nano-PALDI MS --- SALDI MS --- laser desorption --- gas-phase synthesis of nanoparticles --- cluster sources --- nanomaterials prepared by gas aggregation --- polymer/metal nanocomposites --- electroactive actuators --- soft robotics --- biosensors --- chemical sensors --- gas phase --- gas sensors --- nanoparticles --- sputtering --- strain sensors --- core@shell nanoparticles --- CoCr nanoparticles --- cluster ion beam --- nanostructures --- potassium titanyl phosphate --- atomic force microscopy --- power spectral density function --- n/a
Listing 1 - 10 of 83 | << page >> |
Sort by
|