Search results for: structure-and-synthesis

Zeolites

Author : B. Držaj
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The synthesis of zeolites with desired structure and properties is of great importance for the preparation of highly active and selective catalysts for inorganic and organic reactions. The zeolite matrix offers unique possibilities for carrying out molecular shape-selective catalysis and this places the zeolite matrices among the most successful tools used in molecular engineering on a large scale. These proceedings cover the most recent developments in the fields of synthesis, structure determination and technological use of zeolites. The papers give detailed explanations of the processes involved in the mechanisms of zeolite synthesis. Special attention is focussed on complex ionic equilibria which occur in the starting hydrogel, to the ``templating effect'' and to the kinetics of zeolite formation. New powerful methods for structure determination of these materials, which usually consist of small crystals, are presented e.g. neutron diffraction and X-ray diffraction using synchrotron radiation. The distribution of tetrahedrally coordinated framework-constituent elements and their interaction with adsorbates is revealed by using high magnetic field nuclear magnetic resonance with sample spinning at ``magic'' angle (MAS NMR). Quite a number of articles are devoted to the dependence of the physico-chemical properties of zeolites on the parameters set during their synthesis. Descriptions are given of the possible technological use of synthetic zeolites in the fields of adsorption, catalysis, the production of laundry detergents, the removal of radioactive wastes, and the technological use of natural zeolites in the fields of animal feeding, municipal water treatment, paper and cement production, and energy storage. This book will be of interest to scientists working in the fields of catalysis, surface science, inorganic chemistry, materials science, petrochemistry, solid state physics, crystallography and geology.

Organolanthoid Chemistry Synthesis Structure Catalysis

Author : Wolfgang A. Herrmann
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The Porphyrins V1

Author : David Dolphin
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The Porphyrins, Volume I: Structure and Synthesis, Part Ais the first in a series of seven volumes and covers topics like nomenclature, purification, and structural determination of porphyrins, metalloporphyrins, and other related compounds. This volume serves to be a critical review of the topics covered and presents a complete and comprehensible discussion on the chemistry and biochemistry of porphyrins. The chapters in the text tackle the history and geochemistry of porphyrins and related systems. Also covered and discussed in the chapters is the synthesis of porphyrins from mono-, di-, and tetrapyrrolic intermediates. The isolation and modification of porphyrins from natural sources are also discussed. Other related compounds are also included, such as metallo-, aza-, and N-methylporphyrins, and their synthesis and properties. This book is a good introduction and reference for students studying in the fields of chemistry and biochemistry.

Structure and Synthesis of PID Controllers

Author : Aniruddha Datta
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Overview of control systems - Some current techniques for PID controller design - The hermite-Biehler theorema and its generalization - Stabilization of linear time-invariant plants using PID - Optimal design using PID controllers - Robust and non-fragile PID controller design - Stabilization of first-order systems with time delay - Constant gain stabilization with desired damping - Constant gain stabilization of discrete-time plants.

Classical Methods in Structure Elucidation of Natural Products

Author : Reinhard W. Hoffmann
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The structures of many natural products are given in standard textbooks on organic chemistry as 'established facts'. Yet for those natural products whose structures were determined between 1860 and 1960 by classical chemical methods, the lines of evidence are frequently buried under any number of investigations that led to dead ends and to revised structure assignments. Since very little is known about the structure clarification of these products at present, this volume serves to shed light once again on the achievements of previous generations of chemists, who worked with minimal experimental tools. The selection of the 25 representative examples is subjective and arbitrary, dictated by the author's pleasure in recovering fundamental milestones in organic chemistry, with each chapter devoted to one organic compound. The time period covered, however, is more precisely defined: 1860 represents the advent of structure theory, prior to which there was no conceptual framework to address the 'structure' of a compound. One hundred years later, 1960 approximately marks the change from classical structure elucidation to the era in which structure elucidation is mainly based on spectroscopic evidence and X-ray crystallography. Since the emphasis of this work is on classical structure elucidation, work performed later than 1960 is only considered in exceptional cases. Rather than simply provide a history of structure elucidation of particular natural products, the author combines results from historic experiments to trace a line of evidence for those structures that are nowadays accepted as established. This line of evidence may follow the path put forward by the original contributors, yet in some cases the experimental facts have been combined to form another, hopefully shorter, line of evidence. As a result, readers are able to ascertain for themselves the 'facts behind the established structure assignments' of a number of important natural products.

Synthesis and Stereochemistry of Pencolide and Structure and Synthesis of a New Cyclopentenone Derivative from Trichoderma Album

Author : Wu-Yun Ren
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The Porphyrins V2

Author : David Dolphin
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The Porphyrins, Volume II: Structure and Synthesis, Part B is devoted to the structure and synthesis of porphyrins, their precursors, catabolic derivatives, and related systems. The book also covers nomenclature, history, geochemistry, purification, and structural determination of porphyrins, metalloporphyrins, and mono- and polypyrrolic compounds. This volume is organized into 10 chapters and begins with an overview of hydroporphyrins, paying particular attention to their synthesis and stereochemistry as well as reactivity, spectroscopy, and analogues. This book then discusses the synthesis, properties, thermodynamic stability, and evolution of porphyrinogens. The following chapters focus on porphyrins reversibly modified at the periphery by oxidation (oxophlorins) and by irreversible reactions at the periphery. The synthesis of photoexcited porphyrins, metalloporphyrins, and chlorophylls is covered. In addition, chapters on linear polypyrroles, their metal complexes, and macrocycles other than porphyrins are included. This book should be useful to inorganic, organic, physical, and biochemists interested in porphyrin chemistry and biochemistry.

Nanocrystalline Materials

Author : Sie-Chin Tjong
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This second edition of Nanocrystalline Materials provides updated information on the development and experimental work on the synthesis, properties, and applications of nanocrystalline materials. Nanocrystalline materials with new functionalities show great promise for use in industrial applications — such as reinforcing fillers in novel polymer composites — and substantial progress has been made in the past decade in their synthesis and processing. This book focuses primarily on 1D semiconducting oxides and carbon nanotubes, 2D graphene sheets and 0D nanoparticles (metals and inorganic semiconductors). These materials are synthesized under different compositions, shapes and structures, exhibiting different chemical, physical and mechanical properties from their bulk counterparts. This second edition presents new topics relevant to the fast-paced development of nanoscience and nanotechnology, including the synthesis and application of nanomaterials for drug delivery, energy, printed flash memory, and luminescent materials. With contributions from leading experts, this book describes the fundamental theories and concepts that illustrate the complexity of developing novel nanocrystalline materials, and reviews current knowledge in the synthesis, microstructural characterization, physical and mechanical behavior, and application of nanomaterials. Investigates the synthesis, characterization, and properties of a large variety of nanocrystalline materials, and their applications in industry Keeps the prominent challenges in nanomaterials fabrication at the forefront while offering the most up-to-date scientific findings Written by experts in nanomaterials with academic backgrounds in chemistry, physics, and materials engineering

Studies on the Structure and Synthesis of the Ipecac Alkaloids

Author : Melvin Isaac Moyer
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Phthalocyanine Materials

Author : Neil B. McKeown
File Size : 74.21 MB
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This monograph describes the preparation, fabrication and structure of phthalocyanine-based materials.

Clinical Disorders of Hemoglobin Structure and Synthesis

Author : Thomas F. Necheles
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Enamines Synthesis Structure and Reactions

Author : Addison Gilbert Cook
File Size : 65.59 MB
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Bacillus Subtilis Spore Coat Protein Characterization of Structure and Synthesis

Author : Lawrence Edward Munoz
File Size : 28.94 MB
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Inorganic High energy Oxidizers Synthesis Structure and Properties

Author : Edward W. Lawless
File Size : 34.35 MB
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The Structure and Synthesis of Some Compounds Related to Chelidonine

Author : Albert J. Castro
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Fungal Cell Wall

Author : José Ruiz-Herrera
File Size : 62.90 MB
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Fungal Cell Wall presents a comprehensive examination of the structure, synthesis, and growth of the fungal cell wall and explores the reasons for the cell wall's importance to the survival of fungi. Topics covered include the composition and structure of the fungal cell wall and how they are affected by endogenous and external factors; the structure and synthesis of glucans, chitin, and glycoproteins; and the mechanisms of secretion, organization, and final assembly of the cell wall components. The book also features excellent bibliographical coverage, which provides insight into the historical development of current ideas and the basis of current trends in research. Researchers and students in biology, microbiology, mycology, botany, and medical and plant pathology will find this book essential for reference information regarding fungi.

Structure of Gelsemine and Related Synthesis

Author : M. S. Gibson
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Polyoxometalates

Author : Aaron P. Roberts
File Size : 67.50 MB
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Polyoxometalates (abbreviated as POMs), also known as early-transition metal-oxygen anion clusters, is a large and rapidly growing series of inorganic compounds. POMs can be generally divided into two subclasses: isopolyoxometalates(IPOMs) and heteropolyoxometalates (HPOMs). The former refers to a class of isopoly compounds which contain the skeletal transition metal cations and oxide ions of the same metal element. In contrast, the latter one, known as heteropoly compounds (HPCs) as well, contains both heteroatom and coordination atoms. This book reviews properties of POMs, their structure and also their synthesis.

Fundamentals of Perovskite Oxides

Author : Gibin George
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This textbook entitled Fundamentals of Perovskite Oxides: Synthesis, Structure, Properties and Applications summarizes the structure, synthesis routes, and potential applications of perovskite oxide materials. Since these perovskite-type ceramic materials offer opportunities in a wide range of fields of science and engineering, the chapters are broadly organized into four sections of perovskite-type oxide materials and technology. Covers recent developments in perovskite oxides Serves as a quick reference of perovskite oxides information Describes novel synthesis routes for nanostructured perovskites Discusses comprehensive details for various crystal structures, synthesis methods, properties, and applications Applies to academic education, scientific research, and industrial R&D for materials research in real-world applications like bioengineering, catalysis, energy conversion, energy storage, environmental engineering, and data storage and sensing This book serves as a handy and practical guideline suitable for students, engineers, and researchers working with advanced ceramic materials.

Structure and Synthesis of PID Controllers

Author : Aniruddha Datta
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In many industrial applications, the existing constraints mandate the use of controllers of low and fixed order while typically, modern methods of optimal control produce high-order controllers. The authors seek to start to bridge the resultant gap and present a novel methodology for the design of low-order controllers such as those of the P, PI and PID types. Written in a self-contained and tutorial fashion, this book first develops a fundamental result, generalizing a classical stability theorem – the Hermite–Biehler Theorem – and then applies it to designing controllers that are widely used in industry. It contains material on: • current techniques for PID controller design; • stabilization of linear time-invariant plants using PID controllers; • optimal design with PID controllers; • robust and non-fragile PID controller design; • stabilization of first-order systems with time delay; • constant-gain stabilization with desired damping • constant-gain stabilization of discrete-time plants.