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Book
Vibrational Spectroscopy
Authors: ---
ISBN: 3110622254 3110625091 Year: 2019 Publisher: Berlin ; Boston : De Gruyter,

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Abstract

The book presents principles of molecular vibrational spectroscopy from the viewpoint of Raman, Raman optical activity and high excitation. The quantum mechanical basis, vibrational analysis, representation of point groups and its applications are discussed as well. With exercises, it is an essential text for graduates, lecturers, and also researchers.


Book
Novel Analytical Methods in Food Analysis
Authors: ---
ISBN: 3036558152 3036558160 Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

This reprint provides information on the novel analytical methods used to address challenges occurring at academic, regulatory, and commercial level. All topics covered include information on the basic principles, procedures, advantages, limitations, and applications. Integration of biological reagents, (nano)materials, technologies, and physical principles (spectroscopy and spectrometry) are discussed. This reprint is ideal for professionals of the food industry, regulatory bodies, as well as researchers.


Book
Osteoarthritis: From Molecular Pathways to Therapeutic Advances
Author:
Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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In this book, we have reported the most recent discoveries and updates regarding molecular pathways in osteoarthritis. In particular, the advances regarding therapeutical options, from a molecular point of view, are largely discussed.


Book
σ- and π-Hole Interactions
Author:
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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This book describes unconventional noncovalent interactions and analyzes their importance for crystal growth in organic and hybrid organic–inorganic systems. Several examples illustrate how the combination of theory and experiment allows rationalizing the strength and directionality of noncovalent interactions. This book elegantly describes the results of a survey of X-ray structures of main group element compounds (M = Sn, Pb As, Sb, Bi, and Te) exhibiting intermolecular M•••Se noncovalent interactions in one of its chapters. Moreover, it provides a consistent description of noncovalent interactions, covering most groups of the periodic table. The interactions are described and discussed using their trivial names. That is, a comprehensive and accurate description is provided for alkali, alkaline earth, regium, spodium, triel, tetrel, pnictogen, chalcogen, halogen, and aerogen bonding interactions. No other book is available covering such an extensive number of interactions and examples where these interactions are relevant. relevant.


Book
Gulliver in the Country of Lilliput : An Interplay of Noncovalent Interactions
Author:
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Noncovalent interactions are the bridge between ideal gas abstraction and the real world. For a long time, they were covered by two terms: van der Waals interactions and hydrogen bonding. Both experimental and quantum chemical studies have contributed to our understanding of the nature of these interactions. In the last decade, great progress has been made in identifying, quantifying, and visualizing noncovalent interactions. New types of interactions have been classified—their energetic and spatial properties have been tabulated. In the past, most studies were limited to analyzing the single strongest interaction in the molecular system under consideration, which is responsible for the most important structural properties of the system. Despite this limitation, such an approach often results in satisfactory approximations of experimental data. However, this requires knowledge of the structure of the molecular system and the absence of other competing interactions. The current challenge is to go beyond this limitation. This Special Issue collects ideas on how to study the interplay of noncovalent interactions in complex molecular systems including the effects of cooperation and anti-cooperation, solvation, reaction field, steric hindrance, intermolecular dynamics, and other weak but numerous impacts on molecular conformation, chemical reactivity, and condensed matter structure.


Book
Advances in Chemical Analysis Procedures (Part II) : Statistical and Chemometric Approaches
Authors: --- --- --- --- --- et al.
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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In the field of Analytical Chemistry and, in particular, whenever a quali-quantitative analysis is required, until a few years ago, reference was made exclusively to instrumental methods (more or less hyphenated) which, once validated, were able to provide the answers to the questions present, even if only in a limited way to analytical targets. Nowadays, the landscape has become considerably complicated (natural adulterants, assessment of geographical origin, sophistication, need for non-destructive analysis, search for often unknown compounds), and new procedures for processing data have greatly increased the potential of analyses that are conducted (even routinely) in the laboratory. In this scenario, chemometrics is master, able to manage and process a huge amount of information based both on data relating only to the analytes of interest, but also by applying “general” procedures to process raw untargeted analysis data. It is within this strand of analysis that many of the works reported in this Special Issue fall. In the succession of works in this printed version, the criterion that guided us was to highlight how—starting exclusively from chromatographic techniques (HPLC and GC) with conventional detectors and moving to exclusively spectroscopic techniques (MS, FT-IR and Raman)—it is possible arrive at extremely powerful coupled techniques and procedures (HPLC and FT-IR) able to meet research needs. Finally, at the end of the printed volume, there are two reviews that surveying the state of the art regarding the assessment of authenticity through qualitative analyses and the application of chemometrics in the pharmaceutical field in the study of forced drug degradation products. From the succession of works (and, above all, from the various application fields) it can immediately be seen how the application of chemometrics and its procedures to both raw and processed data is a powerful means of obtaining robust, reproducible, and predictive information. In this manner, it is possible to create models able to explain and respond to the original problem in a much more detailed way. , and Honghe through Fourier transform mid infrared (FT-MIR) spectra combined with partial least squares discriminant analysis (PLS-DA), random forest (RF), and hierarchical cluster analysis (HCA) methods. Melucci and collaborators apply chemometric approaches to non-destructive analysis of ATR-FT-IR for the determination of biosilica content. This value was directly evaluated in sediment samples, without any chemical alteration, using attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, and the quantification was performed by combining the multivariate standard addition method (MSAM) with the net analyte signal (NAS) procedure to solve the strong matrix effect of sediment samples. Still in the food and food supplements field, Anguebes-Franseschi and collaborators report an article where 10 chemometric models based on Raman spectroscopy were applied to predict the physicochemical properties of honey produced in the state of Campeche, Mexico.


Book
Bio-Based Polymers for Engineered Green Materials
Authors: ---
ISBN: 3039289268 303928925X Year: 2020 Publisher: MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

With daily signals, Nature is communicating us that its unconscious wicked exploitation is no more sustainable. Our socio-economic system focuses on production increasing without considering the consequences. We are intoxicating ourselves on a daily bases just to allow the system to perpetuate itself. The time to switch into more natural solutions is come and the scientific community is ready to offer more natural product with comparable performance then the market products we are used to deal with. This book collects a broad set of scientific examples in which research groups from all over the world, aim to replace fossil fuel-based solutions with biomass derived materials. In here, some of the most innovative developments in the field of bio-materials are reported considering topics which goes from biomass valorization to the synthesis of high preforming bio-based materials.

Keywords

chitosan --- graphene oxide --- microstructure --- autoxidation --- heavy metals --- polycaprolactone --- precipitation --- thermosetting polymers --- thermal degradation --- humidity sensor --- asphalt rubber --- tung oil --- nanobiocomposites --- ionic liquid --- GC-MS --- hybrid nonisocyanate polyurethane --- physicochemical properties --- alginate sponge --- Bioflex --- dimer acid --- bio-asphalt --- benzoyl cellulose --- Peptone --- transparent wood --- biocomposite --- nanoclays --- storage stability --- solvent- and catalyst-free --- microcellulose fiber --- lignin-containing cellulose nanofibrils --- polylactic acid (PLA) --- bio-inspired interfaces --- polyhydroxyalkanoates --- strain sensor --- enzymatic saccharification --- headspace solid phase microextraction --- PHBV --- electrical resistance --- melt condensation --- cement --- solution casting --- orange waste --- hybrid composites --- biopolymers --- TEMPO oxidation --- pollutant adsorbents --- Escherichia coli --- bio-nanocomposites --- TiO2 anatase --- metal binding --- liquid natural rubber --- hydrotropic treatment --- metal chloride --- feast-famine --- biomass resources --- wood --- electroless deposition --- one-pot synthesis --- thermoplastic starch --- films --- lignin-carbohydrate complex --- cellulose --- corn starch --- microencapsulated phase change material (MPCM) --- differential scanning calorimetry --- compatibility --- natural fibers --- workability --- silkworm cocoons --- lignin content --- polylactic acid --- porous structure --- electrospinning --- nanocellulose fibers --- H2O2 bleaching treatment --- polysaccharides --- mixing sequence --- porosity --- lignocellulosic nanofibrils --- dense structure --- alkali lignin --- polydopamine coating --- nuclear magnetic resonance --- cationic dyes --- poly(lactic acid) and composite films --- endothermic effect --- HSQC-NMR --- Microbial nutrient --- n/a --- toughening --- X-ray diffraction --- water resistance --- waste biomass --- lignin --- UV light --- ultrafiltration --- two-step lyophilization --- mechanical degradation --- bio-based --- methylene blue --- stearoyl cellulose --- ONP fibers --- anionic surfactants --- Hatscheck process --- osteoblast proliferation --- resource recovery --- dissolution --- copper coating --- bacterial cellulose --- hydrogel --- iron chelation --- knotwood --- sensitivity --- mixed microbial cultures --- dimensional stability --- volatiles --- lignocellulose --- Artemisia vulgaris --- surface modification --- PHA --- crosslinked microparticles --- pyrene --- composites --- galactoglucomannan --- polymeric composites --- kaempferol --- tannin-furanic foam --- Solanyl --- wastewater treatments --- adsorption capacity --- heat treatment --- thermal gravimetric analysis --- WAXS --- unsaturated polyester resins --- pulp fibers --- free-radical polymerization --- larixol --- delignification --- antifouling --- chemical composition --- hemicellulose --- tissue engineering --- extrusion-compounding --- membrane --- photodegradation --- structural plastics --- scanning electron microscope --- phenanthrene --- thermal properties --- immobilized TEMPO --- Staphylococcus aureus --- adsorption --- wood modification --- structure–property relationship --- physical property --- film --- mechanical properties --- tannin --- Bio-based foams --- latex state --- paper-based scaffolds --- skincare --- pyrolysis mechanism --- emulsion-solvent evaporation method --- bioplastics --- imidazolium --- fractionation --- cost --- fiber-cement --- lyocell fiber --- recycling --- kenaf fiber --- thermal stability --- transport properties --- SAXS --- silanization --- cellulose nanofibers --- taxifolin --- tannin polymer --- vibrational spectroscopy --- robust fiber network --- nanocelluloses --- poly(lactic acid) --- Anti-bacterial silver nanoparticle --- cellulose nanocrystals --- structure-property relationship

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