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The Special Issue “Liquid Crystal Optical Devices” discusses recent developments in the rapidly advancing subject of liquid crystals (LCs).

n/a --- liquid crystal lenses --- optical phased arrays --- gold nanoparticles --- adaptive-focus lenses --- dielectric anisotropy --- liquid-crystal waveguides --- volume gratings --- beam steering --- Mueller matrices --- nematic --- optical fiber device --- liquid crystals --- optoelectronics --- polarization-selective devices --- tapered optical fiber --- waveguides --- fast response time --- Pancharatnam?Berry phase --- optical modulation --- depolarization --- liquid crystal --- optical switching devices --- dual frequency nematic --- phase modulation

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Developing new materials is usually a time-demanding and meticulous process, but at the same time, it is one of the more promising solutions to obtain a cleaner, safer, and smart future. More in detail, referring to nanomaterials, an increasingly successfully tool of nanotechnologies, nanoparticles are categorized as materials in which at least one dimension is less than 100 nm in diameter. Among the various nanoparticles’ categories, metal and metal oxides nanoparticles stand as an emerging nanotechnological solution for a wide range of biological and medical physio/pathological open questions. This Special Issue covers the fundamental science, design, characterization, and biomedical applications of metal and metal oxide nanomaterials. The articles here presented will embrace all the aspects determining the performance of these systems, ranging from their synthesis, design, chemical, physical, and biological functionalization, to their characterization and successful applications.

mesoporous zinc oxide --- polyHEMA --- hydrogel --- drug-eluting stent --- pH-triggered drug release --- self-assembly --- nanoshells (hollow spheres) --- janus particles --- pickering emulsion --- bismuth oxide --- nanoparticles --- radiopacity --- chemotherapy --- theragnostic --- metal nanoparticles --- iron oxide nanoparticles --- silver nanoparticles --- gold nanoparticles --- titanium dioxide nanoparticles --- zinc nanoparticles --- reactive oxygen species --- photodynamic therapy --- photothermal therapy --- sonodynamic therapy --- magnetite nanoparticles --- magnetic nanoparticles --- immobilization --- protein --- polymer coating --- n/a

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Wine aging is a desirable and valuable process, commonly used to improve wine quality, and traditionally carried out in oak wooden casks. The correct use of oak barrels and the ever-increasing demand for barrels in the different production areas of the world has led to a constant search for technological alternatives to reproduce the chemical and physical processes undergone by wines during their stay in barrels.The aim of this Special Issue is to publish a compilation of original research and revision works that cover different aspects of the ageing processes of wine in casks and other alternative systems that reproduce, with different technologies, the transformations that take place in the barrel.Important aspects to be addressed are:the type of technological solutions that exist for wine agingthe impact of these new technologies on the final productcomparison of the effect of emerging and traditional technologies on the wine ageddifferentiation of wines undergoing different systems to avoid fraudcharacterization of the new materials used in barrel productionaccelerated aging of wines with wood and oxygen

dissolved oxygen --- oak fragments --- red wine --- chips --- gold nanoparticles --- regeneration --- phenolic compounds --- wine aging --- sensorial characteristics --- alternative woods --- oak wood barrel --- sensory analysis --- sanitation --- MDGC-MS --- ellagitannins --- white wine --- high power ultrasound --- volatile compounds --- oak --- tridecane --- traditional oaks --- other woods --- different oaks --- oak barrels --- barrels --- Pinot noir --- brettanomyces --- triangular tasting --- Quercus pyrenaica --- must --- trans-2-decenal --- aging --- floating and fixed micro-oxygenation --- grapes --- low molecular phenols

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Food safety and quality represent a major concern worldwide, not only for the potential risk to consumers’ health but also for the economic losses occurring in food industries. A complete quality system involves raw matter, environmental conditions, production processes, storage and distribution, taking into account the purpose for which the end product is intended. Appropriate analytical methods combined with good hygiene practices are essential to ensure a safe food supply and/or to minimize the occurrence of foodborne outbreaks due to the consumption of food contaminated with pathogens such as bacteria, fungi and parasites. On the other hand, the lack of measures able to detect quality deterioration, spoilage, authenticity and adulteration, as well as texture, rheology and sensory properties of food can affect the food industry economy and reduce consumer confidence. The use of rapid analytical methods can benefit food companies in saving time and cost, indicating the importance of developing new reliable assays for good and fast control of products throughout the whole food chain.

honey --- water activity --- moisture content --- regression --- categorical testing --- QuEChERS --- dispersive liquid–liquid microextraction --- sulfuric acid treatment --- gas chromatography --- tandem mass spectrometry --- priority substances --- fish samples --- Trichinella spp. --- slaughterhouse --- accreditation --- proficiency testing --- PAH content --- Hercegovačka pečenica --- traditional smoking --- industrial smoking --- Listeria monocytogenes --- outbreak --- molecular methods --- real-time PCR --- screening --- Anisakis spp. --- LAMP --- validation --- anisakidae family --- NIR --- PLS --- PCA --- correlogram --- sensory analysis --- gold nanoparticles --- histamine --- UV-visible and fluorescence --- visual detection --- spoilage marker --- safety --- assay --- pollutants --- polyciclic aromatic hydrocarbons --- Trichinella --- Anisakis --- nanoparticles

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The Special Issue “Nanostructured Materials Based on Noble Metals for Advanced Biological Applications” highlights the recent progress in gold and silver nanomaterials preparation/synthesis as well as their innovative applications in advanced applications, such as in nanomedicine and nanosensors. It is nowadays generally accepted that nanostructured noble metals allow the production of highly competitive materials. In fact, a specific design and rather simple and reliable preparation techniques can be used to obtain optimized material uses and possibilities for their reusability. One expects amazing future developments for these nanotechnologies from research laboratories to key industrial areas. The Guest Editor and the MDPI staff are therefore pleased to offer this Special Issue to interested readers, including researchers, graduate and PhD students as well as postdoctoral researchers, but also to the entire community interested in the wide world of nanomaterials.

gold --- nanostructure --- EDTA tetrasodium salt --- photothermal therapy --- silver nanoparticles --- biomedical applications --- biological interactions --- biofunctional performances --- intrinsic anti-inflammatory activity --- antimicrobial efficiency --- localized surface plasmon resonance --- dip-coating --- capillary force --- exosome --- gold nanoparticles --- copper(I) complexes --- conjugates --- drug delivery --- anticancer compounds --- niosomes --- liposomes --- plasmonic materials --- nanocarriers --- Hg2+ sensors --- heavy metal sensing --- plasmonic sensors --- optical sensors --- ecosafety --- nanoparticles --- interactions --- protein corona --- nanomedicine --- biomolecules --- nanomaterials --- noble metal nanoparticles --- gold nanomaterials --- silver nanomaterials --- hybrid metal–polymer nanoparticles --- biotechnological applications --- nanomaterials for drug delivery --- nanomaterials for sensing