Erscheinungsdatum: 31.05.2019, Medium: Buch, Einband: Gebunden, Titel: Photophysical Studies of Pi-conjugated Oligomers and Polymers That Incorporate Inorganic MLCT Chromophores, Autor: Walters, Keith, Verlag: Dissertation Discovery Company, Sprache: Englisch, Schlagworte: SCIENCE // Chemistry // General, Rubrik: Chemie // Allgemeines, Lexika, Seiten: 272, Informationen: HC gerader Rücken kaschiert, Gewicht: 954 gr, Verkäufer: averdo
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Multidimensional (nD) NMR spectroscopy has become a powerful and indispensable tool in elucidating the structures and dynamics of large macromolecules. This technique has routinely been used for microstructure analysis of copolymers for decades. A detailed knowledge of the structural features of a polymer is important to establish the structure-property relationship. But the complexity of polymer microstructure is increasing as more than two monomers are combined to make new materials for diversified as well as unique applications. Techniques like isotopic labeling, selective excitation, pulsed field gradient in combination with multidimensional NMR are being successfully used to solve challenges associated with large and complex biopolymers. Combination of these techniques, which are used in bio-NMR for long time, along with nD-NMR can also be used to analyze the structure of complex polymers and materials. In this book, application of new multidimensional NMR methods, which incorporate the above mentioned techniques, in microstructure analysis of complex polymers, has been discussed.
Over the years, there has been increasing demand of sensors for clinical diagnosis, environmental, and industrial applications with strong requirements concerning selectivity, sensitivity and speed. In this manuscript readers can able to find out the cost-effective, sensitive, selective and easy to operate technique for ultimate use in the detection of biomolecules ranging from micro- to macromolecular size at trace level, which is fabricated for common people. In this book author try to incorporate both the fundamentals and wide application of target-specific materials, which is popularly called as molecularly imprinted polymers (MIP). In this hardcover, readers can find out a detail overview of MIP-based electrochemical sensors fabrication for the detection and enantio-differentiation of D- and L-enantiomers of biomolecules acts as effective biomarkers for some very common diseases viz., folic acid for chrohn s disease, epilepsy, anemia, tryptophan for schizophrenia and other neural related diseases, thyroxine for clinical treatment of thyroid & maintaining its normal growth, insulin for diabetes mellitus.
This book focuses on the detailed investigation of stress-induced birefringence in polymer optical waveguides and demonstrates an approach for the potential design of polarization-insensitive waveguide devices considering such stress-effects. To estimate the stresses accurately, it presents a process-modeling framework in the Finite Element analysis, which can incorporate important stress build-up processes, such as polymerization shrinkage, stress relaxation, and etching, over the entire history of the waveguide fabrication process. It also presents the characterization of the stress-optic and thermo-optic coefficients of polymers in thin film waveguide. Being generic in nature, the described approach enables the optimized design of various integrated optical devices from the standpoint of material systems, waveguide geometry, and process parameters. This book is expected to lay the groundwork for the researchers on the management of stress related problems in integrated optical devices and photonic packaging.
Polyhydroxyalkanoate (PHA) is a type of biodegradable polymer derived from microbial fermentation. It has gained much attention as a potential substitute for some petrochemical-based polymers because of its similar material properties. PHA serves as intracellular energy storage material and the key enzyme involved in PHA biosynthesis is PHA synthase (PhaC). The life cycle of PHA is sustainable since it is primarily produced from renewable bio-based carbon sources. Global consumption of PHA is still a challenge due to the high production cost involved. Ongoing researches often include identification of cheap and renewable carbon feedstock and bacterial strains exhibiting PhaC with broad substrate specificity and ability to synthesize high concentrations of PHA. This work devotes such interest in studying the potentials of a natural PhaC belonging to the strain Chromobacterium sp. USM2. The PhaC of this strain exhibited high activity and the ability to incorporate co-monomers of 3-hydroxyvalerate and 3-hydroxyhexanoate. PHA terpolymers with interesting polymeric properties were produced using crude palm kernel oil as the main carbon source and addition of precursor substrates.
Smart materials are one of frontier technologies in engineering and manufacturing. A smart material is capable of recognising appropriate environmental stimuli,processing the information arising from the stimuli,and responding to it in an appropriate manner and time frame. It is well known that inherently conducting polymers (ICPs) provide some interesting possibilities in this regard. ICPs are polymers capable of conducting electricity and have the ability to sense and actuate, leading many researchers to envisage intelligent polymer systems based on ICPs. Fabrication of conducting polymers in different forms is necessary to achieve such smart materials system. Fibre spinning for example, can bring new opportunities to develop ICPs. Conducting polymer fibres are likely to be important for electronic textiles, actuators and biomedical applications, as they allow the possibility to incorporate desirable features such as chemical sensing or actuation that are not feasible other synthetic fibres. This book aims to produce novel polypyrrole fibres via the development of nanostructured conducting polypyrrole suitable for fabricating into fibres.