общая химия (страница 13)

Автор: Группа авторов

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Автор: Max Diem

A concise textbook bridging quantum theory and spectroscopy! Designed as a practical text, Quantum Mechanical Foundations of Molecular Spectroscopy covers the quantum mechanical fundamentals of molecular spectroscopy from the view of a professional spectroscopist, rather than a theoretician. Written by a noted expert on the topic, the book puts the emphasis on the relationship between spectroscopy and quantum mechanics, and provides the background information and derivations of the subjects needed to understand spectroscopy including: stationary energy states, transitions between these states, selection rules, and symmetry. The phenomenal growth of all forms of spectroscopy over the past eight decades has contributed enormously to our understanding of molecular structure and properties. Today spectroscopy covers a broad field including the modern magnetic resonance techniques, non-linear, laser and fiber-based spectroscopy, surface and surface-enhanced spectroscopy, pico- and femtosecond time resolved spectroscopy, and many more. This up-to-date resource discusses several forms of spectroscopy that are used in many fields of science, such as fluorescence, surface spectroscopies, linear and non-linear Raman spectroscopy and spin spectroscopy. This important text: Contains the physics and mathematics needed to understand spectroscopy Explores spectroscopic methods the are widely used in chemistry, biophysics, biology, and materials science Offers a text written by an experienced lecturer and practitioner of spectroscopic methods Includes detailed explanations and worked examples Written for chemistry, biochemistry, material sciences, and physics students, Quantum Mechanical Foundations of Molecular Spectroscopy provides an accessible text for understanding molecular spectroscopy.

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Автор: Max Diem

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Автор: J?rg Flock

Bereits seit vielen Jahren wird die Rontgenfluoreszenzenzanalyse eingesetzt fur die Untersuchung kompakter, homogener Proben wie Metallen oder Glasern, aber auch fur die Analyse pulverformiger Proben wie etwa geologische Proben, Zement und Eisenlegierungen. In den letzten Jahren haben sich viele neue Applikationsgebiete fur diese Methode eroffnet. Im vorliegenden Buch erfolgt zunachst eine kurze Darstellung der physikalischen Zusammenhange bei der Erzeugung und Wechselwirkung von Rontgenstrahlung in der zu untersuchenden Probe. Dann werden die verschiedenen Methoden der Probenpraparation in Abhangigkeit von der Qualitat des Ausgangsmaterials sowie von der analytischen Zielstellung vorgestellt. Nach einer kurzen Beschreibung der verschiedenen Geratetypen, die in der Rontgenanalytik existieren, und deren Leistungsfahigkeit wird auf die Auswahl optimaler Messbedingungen eingegangen sowie die Aufbereitung der Messdaten erlautert, angefangen von deren Korrektur uber die Bestimmung der Intensitaten bis hin zum endgultigen Analysenergebnis, auch unter Berucksichtigung, Vermeidung und Korrektur moglicher auftretender Fehler. Nach einer kurzen Beschreibung der Gefahren einer Schadigung durch Rontgenstrahlung und der Anforderungen zu denen Verhinderung werden die verschiedenen Applikationen der Rontgenfluoreszenz beschrieben.

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Автор: Anatoliy Swishchuk

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Автор: Roger A. Grimes

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Автор: Pablo Dom?nguez de Mar?a

Paves the way for new industrial applications using redox biocatalysis Increasingly, researchers rely on the use of enzymes to perform redox processes as they search for novel industrial synthetic routes. In order to support and advance their investigations, this book provides a comprehensive and current overview of the use of redox enzymes and enzyme-mediated oxidative processes, with an emphasis on the role of redox enzymes in chemical transformations. The authors examine the full range of topics in the field, from basic principles to new and emerging research and applications. Moreover, they explore everything from laboratory-scale procedures to industrial manufacturing. Redox Biocatalysis begins with a discussion of the biochemical features of redox enzymes as well as cofactors and cofactor regeneration methods. Next, the authors present a variety of topics and materials to the research and development of full-scale industrial applications, including: Biocatalytic applications of redox enzymes such as dehydrogenases, oxygenases, oxidases, and peroxidases Enzyme-mediated oxidative processes based on biocatalytic promiscuity All the steps from enzyme discovery to robust industrial processes, including directed evolution, high-throughput screening, and medium engineering Case studies tracing the development of industrial applications using biocatalytic redox reactions Each chapter ends with concluding remarks, underscoring the key scientific principles and processes. Extensive references serve as a gateway to the growing body of research in the field. Researchers in both academia and industry will find this book an indispensable reference for redox biotransformations, guiding them from underlying core principles to new discoveries and emerging industrial applications.

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Автор: Alexander Wolf

Einstein proposed his theory of special relativity in 1905. For a long time it was believed that this theory has no significant impact on chemistry. This view changed in the 1970s when it was realized that (nonrelativistic) Schrodinger quantum mechanics yields results on molecular properties that depart significantly from experimental results. Especially when heavy elements are involved, these quantitative deviations can be so large that qualitative chemical reasoning and understanding is affected. For this to grasp the appropriate many-electron theory has rapidly evolved. Nowadays relativistic approaches are routinely implemented and applied in standard quantum chemical software packages. As it is essential for chemists and physicists to understand relativistic effects in molecules, the first edition of «Relativistic Quantum Chemistry – The fundamental Theory of Molecular Science» had set out to provide a concise, comprehensive, and complete presentation of this theory. This second edition expands on some of the latest developments in this fascinating field. The text retains its clear and consistent style, allowing for a readily accessible overview of the complex topic. It is also self-contained, building on the fundamental equations and providing the mathematical background necessary. While some parts of the text have been restructured for the sake of clarity a significant amount of new content has also been added. This includes, for example, an in-depth discussion of the Brown-Ravenhall disease, of spin in current-density functional theory, and of exact two-component methods and its local variants. A strength of the first edition of this textbook was its list of almost 1000 references to the original research literature, which has made it a valuable reference also for experts in the field. In the second edition, more than 100 additional key references have been added – most of them considering the recent developments in the field. Thus, the book is a must-have for everyone entering the field, as well as for experienced researchers searching for a consistent review.

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Автор: Abdelkhalak El Hami

In this book, the authors present in detail several recent methodologies and algorithms that we have developed during the last fifteen years. The deterministic methods account for uncertainties through empirical safety factors, which implies that the actual uncertainties in materials, geometry and loading are not truly considered. This problem becomes much more complicated when considering biomechanical applications where a number of uncertainties are encountered in the design of prosthesis systems. This book implements improved numerical strategies and algorithms that can be applied only in biomechanical studies.

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Автор: Группа авторов

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Автор: Guangjin Zhao

A comprehensive guide to the reuse and recycling of lithium-ion power batteries—fundamental concepts, relevant technologies, and business models Reuse and Recycling of Lithium-Ion Power Batteries explores ways in which retired lithium ion batteries (LIBs) can create long-term, stable profits within a well-designed business operation. Based on a large volume of experimental data collected in the author’s lab, it demonstrates how LIBs reuse can effectively cut the cost of Electric Vehicles (EVs) by extending the service lifetime of the batteries. In addition to the cost benefits, Dr. Guangjin Zhao discusses how recycling and reuse can significantly reduce environmental and safety hazards, thus complying with the core principles of environment protection: recycle, reuse and reduce. Offering coverage of both the fundamental theory and applied technologies involved in LIB reuse and recycling, the book's contents are based on the simulated and experimental results of a hybrid micro-grid demonstration project and recycling system. In the opening section on battery reuse, Dr. Zhao introduces key concepts, including battery dismantling, sorting, second life prediction, re-packing, system integration and relevant technologies. He then builds on that foundation to explore advanced topics, such as resource recovery, harmless treatment, secondary pollution control, and zero emissions technologies. Reuse and Recycling of Lithium-Ion Power Batteries: • Provides timely, in-depth coverage of both the reuse and recycling aspects of lithium-ion batteries • Is based on extensive simulation and experimental research performed by the author, as well as an extensive review of the current literature on the subject • Discusses the full range of critical issues, from battery dismantling and sorting to secondary pollution control and zero emissions technologies • Includes business models and strategies for secondary use and recycling of power lithium-ion batteries Reuse and Recycling of Lithium-Ion Power Batteries is an indispensable resource for researchers, engineers, and business professionals who work in industries involved in energy storage systems and battery recycling, especially with the manufacture and use (and reuse) of lithium-ion batteries. It is also a valuable supplementary text for advanced undergraduates and postgraduate students studying energy storage, battery recycling, and battery management.

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Автор: Volodymyr Bezverkhniy

Using the concept of three-electron bond we can represent the actual electron structure of benzene and other molecules, explain specificity of the aromatic bond and calculate the delocalization energy. The aromatic bond is a three-electron bond in flat cyclic systems with a specific interaction of electrons through the cycle. In benzene formed a new type of chemical bonds – an aromatic bond, which has a multiplicity of more than 1.5 (1.66) http://vixra.org/author/bezverkhniy_volodymyr_dmytrovych

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Автор: Группа авторов

The Reviews in Computational Chemistry series brings together leading authorities in the field to teach the newcomer and update the expert on topics centered around molecular modeling, such as computer-assisted molecular design (CAMD), quantum chemistry, molecular mechanics and dynamics, and quantitative structure-activity relationships (QSAR). This volume, like those prior to it, features chapters by experts in various fields of computational chemistry. Topics in Volume 28 include: Free-energy Calculations with Metadynamics Polarizable Force Fields for Biomolecular Modeling Modeling Protein Folding Pathways Assessing Structural Predictions of Protein-Protein Recognition Kinetic Monte Carlo Simulation of Electrochemical Systems Reactivity and Dynamics at Liquid Interfaces

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Автор: Группа авторов

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Автор: Группа авторов

REVIEWS IN COMPUTATIONAL CHEMISTRY THE LATEST VOLUME IN THE REVIEWS IN COMPUTATIONAL CHEMISTRY SERIES, THE INVALUABLE REFERENCE TO METHODS AND TECHNIQUES IN COMPUTATIONAL CHEMISTRY Reviews in Computational Chemistry reference texts assist researchers in selecting and applying new computational chemistry methods to their own research. Bringing together writings from leading experts in various fields of computational chemistry, V olume 32 covers topics including global structure optimization, time-dependent density functional tight binding calculations, non-equilibrium self-assembly, cluster prediction, and molecular simulations of microphase formers and deep eutectic solvents. In keeping with previous books in the series, Volume 32 uses a non-mathematical style and tutorial-based approach that provides students and researchers with easy access to computational methods outside their area of expertise. The chapters comprising Volume 32 are connected by two themes: methods that can be broadly applied to a variety of systems, and special considerations required when modeling specific system types. Each in-depth chapter contains background and theory, strategies for using the methods correctly, mini-tutorials and best practices, and critical literature reviews highlighting advanced applications. Essential reading for both newcomers and experts in the area of molecular modeling, this state-of-the-art resource: Covers topics such as non-deterministic global optimization (NDGO) approaches and excited-state dynamics calculations Contains a detailed overview of deep eutectic solvents (DESs) and simulation methods Presents methodologies for investigating chemical systems that form microphases with periodic morphologies such as lamellae and cylinders Features step-by-step tutorials on applying techniques to probe and understand the chemical dynamics exhibited in a system Includes detailed subject indices on each volume in the series and up-to-date compendiums of molecular modeling software, services, programs, suppliers, and other useful information Reviews in Computational Chemistry, Volume 32 is a must-have guide for computational chemists, theoretical chemists, pharmaceutical chemists, biological chemists, chemical engineers, researchers in academia and industry, and graduate students involved in molecular modeling.

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Автор: Группа авторов

The Reviews in Computational Chemistry series brings together leading authorities in the field to teach the newcomer and update the expert on topics centered on molecular modeling, such as computer-assisted molecular design (CAMD), quantum chemistry, molecular mechanics and dynamics, and quantitative structure-activity relationships (QSAR). This volume, like those prior to it, features chapters by experts in various fields of computational chemistry. Topics in Volume 29 include: Noncovalent Interactions in Density-Functional Theory Long-Range Inter-Particle Interactions: Insights from Molecular Quantum Electrodynamics (QED) Theory Efficient Transition-State Modeling using Molecular Mechanics Force Fields for the Everyday Chemist Machine Learning in Materials Science: Recent Progress and Emerging Applications Discovering New Materials via a priori Crystal Structure Prediction Introduction to Maximally Localized Wannier Functions Methods for a Rapid and Automated Description of Proteins: Protein Structure, Protein Similarity, and Protein Folding

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Автор: Группа авторов

Risk management practices are growing both in number and complexity in businesses, notably driven by new regulatory standards that feature risk management at their core. Although large businesses are more likely to adopt a formal, holistic approach to risk management, the stakes are just as high for SMEs. Risk management in SMEs can contribute to a certain organizational, entrepreneurial and partnership dynamic which constitutes a real opportunity to evolve practices and improve performance. This book offers varied responses to this question by combining conceptual approaches, empirical illustrations and the associated managerial implications.

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Автор: Mark Spitznagel

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Автор: Eric R. Carlson

Salivary Gland Pathology: Diagnosis and Management, Second Edition, updates the landmark text in this important discipline within oral and maxillofacial surgery, otolaryngology/head and neck surgery, and general surgery. Written by well-established clinicians, educators, and researchers in oral and maxillofacial surgery, this book brings together information on the etiology, diagnosis, and treatment of all types of salivary gland pathology. Clear and comprehensive, Salivary Gland Pathology: Diagnosis and Management offers complete explanation of all points, supported by a wealth of clinical and surgical illustrations to allow the reader to gain insight into every facet of each pathologic entity and its diagnosis and treatment. Salivary Gland Pathology: Diagnosis and Management offers comprehensive coverage of all aspects of this topic. Beginning with the embryology, anatomy and physiology of the salivary glands, the first section of the book discusses radiographic imaging, infections, cystic conditions, sialoadenitis and sialolithiasis, and systemic diseases. The second section of the book is devoted to the classification of salivary gland tumors and devotes individual chapters to the discussion of each type. Additions for this section of the second edition include molecular biology of salivary gland neoplasia, radiation therapy, and chemotherapy and targeted therapy for salivary gland malignancies. The book closes with a discussion of pediatric salivary gland pathology, traumatic injuries of the salivary glands and miscellaneous pathologic processes of the salivary glands and ducts, including a section on saliva as a diagnostic fluid. The book is intended for a very diverse audience, including academic oral and maxillofacial surgeons, otolaryngologists / head and neck surgeons, general surgeons, as well as residents in these disciplines. Private practitioners will want to place this publication on the bookshelves of their offices so as to consult the textbook when evaluating a patient with salivary gland pathology.

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Автор: Группа авторов

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Автор: Chaudhery Mustansar Hussain

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Автор: Группа авторов

A comprehensive summary of novel approaches to the stereoselective construction of glycosidic linkages, covering modern glycosylation methods and their use and application in natural product synthesis and drug discovery. Clearly divided into five sections, the first describes recent advances in classical methodologies in carbohydrate chemistry, while the second goes on to deal with newer chemistries developed to control selectivity in glycosylation reactions. Section three is devoted to selective glycosylation reactions that rely on the use of catalytic promoters. Section four describes modern approaches for controlling regioselectivity in carbohydrate synthesis. The final section focuses on new developments in the construction of «unusual» sugars and is rounded off by a presentation of modern procedures for the construction of glycosylated natural products. By providing the latest advances in glycosylation as well as information on mechanistic aspects of the reaction, this is an invaluable reference for both specialists and beginners in this booming interdisciplinary field that includes carbohydrate chemistry, organic synthesis, catalysis, and biochemistry.

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Автор: Группа авторов

Provides comprehensive knowledge on concepts, theoretical methods and state-of-the-art computational techniques for the simulation of self-assembling systems Looks at the field of self-assembly from a theoretical perspective Highlights the importance of theoretical studies and tailored computer simulations to support the design of new self-assembling materials with useful properties Divided into three parts covering the basic principles of self-assembly, methodology, and emerging topics

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Автор: R?diger Memming

Providing both an introduction and an up-to-date survey of the entire field, this text captivates the reader with its clear style and inspiring, yet solid presentation. The significantly expanded second edition of this milestone work is supplemented by a completely new chapter on the hot topic of nanoparticles and includes the latest insights into the deposition of dye layers on semiconductor electrodes. In his monograph, the acknowledged expert Professor Memming primarily addresses physical and electrochemists, but materials scientists, physicists, and engineers dealing with semiconductor technology and its applications will also benefit greatly from the contents.

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Автор: Группа авторов

Separation and purification processes play a critical role in biorefineries and their optimal selection, design and operation to maximise product yields and improve overall process efficiency. Separations and purifications are necessary for upstream processes as well as in maximising and improving product recovery in downstream processes. These processes account for a significant fraction of the total capital and operating costs and also are highly energy intensive. Consequently, a better understanding of separation and purification processes, current and possible alternative and novel advanced methods is essential for achieving the overall techno-economic feasibility and commercial success of sustainable biorefineries. This book presents a comprehensive overview focused specifically on the present state, future challenges and opportunities for separation and purification methods and technologies in biorefineries. Topics covered include: Equilibrium Separations: Distillation, liquid-liquid extraction and supercritical fluid extraction. Affinity-Based Separations: Adsorption, ion exchange, and simulated moving bed technologies. Membrane Based Separations: Microfiltration, ultrafiltration and diafiltration, nanofiltration, membrane pervaporation, and membrane distillation. Solid-liquid Separations: Conventional filtration and solid-liquid extraction. Hybrid/Integrated Reaction-Separation Systems: Membrane bioreactors, extractive fermentation, reactive distillation and reactive absorption. For each of these processes, the fundamental principles and design aspects are presented, followed by a detailed discussion and specific examples of applications in biorefineries. Each chapter also considers the market needs, industrial challenges, future opportunities, and economic importance of the separation and purification methods. The book concludes with a series of detailed case studies including cellulosic bioethanol production, extraction of algae oil from microalgae, and production of biopolymers. Separation and Purification Technologies in Biorefineries is an essential resource for scientists and engineers, as well as researchers and academics working in the broader conventional and emerging bio-based products industry, including biomaterials, biochemicals, biofuels and bioenergy.

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Автор: Группа авторов

Edited by a leading authority in the field, the first book on this important and emerging topic provides an overview of the latest trends in sequence-controlled polymers. Following a brief introduction, the book goes on to discuss various synthetic approaches to sequence-controlled and biological polymers, including genetic polymers, peptide polymers and biohybrids, as well as single-chain nanoparticles. Moreover, different polymerization techniques, such as anionic and cationic as well as radical chain growth mechanism, are explained, before concluding with a look at the future for sequence-controlled polymers. With its unique coverage of this interdisciplinary field, the text will prove invaluable to polymer and environmental chemists, as well as biochemists and bioengineers.

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Автор: Mohammad H. Elahinia

This book provides a systematic approach to realizing NiTi shape memory alloy actuation, and is aimed at science and engineering students who would like to develop a better understanding of the behaviors of SMAs, and learn to design, simulate, control, and fabricate these actuators in a systematic approach. Several innovative biomedical applications of SMAs are discussed. These include orthopedic, rehabilitation, assistive, cardiovascular, and surgery devices and tools. To this end unique actuation mechanisms are discussed. These include antagonistic bi-stable shape memory-superelastic actuation, shape memory spring actuation, and multi axial tension-torsion actuation. These actuation mechanisms open new possibilities for creating adaptive structures and biomedical devices by using SMAs.

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Автор: Группа авторов

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Автор: Alan R. Simon

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Автор: Florencio Zaragoza D?rwald

This new textbook is the successor to the volume «Side Reactions in Organic Synthesis – A Guide to Successful Synthesis Design» (2004), written by the same author. Whereas the predecessor mainly covered the limitations of aliphatic substitution reactions, this new volume focuses on the most important aromatic substitution reactions, both electrophilic and nucleophilic, such as amination reactions, halogenation reactions, Friedel-Crafts acylations, or transition metal-catalyzed arylation reactions. Each chapter not only describes the scope of a specific reaction type, but also reveals what cannot be achieved with this reaction, i.e. what type of side reactions are to be expected with certain starting materials or electrophiles/nucleophiles. With its unique approach, this is a must-have book for graduate students in organic chemistry and synthetic chemists both in academia and industry!

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Автор: Группа авторов

Discover the experimental and theoretical developments in optical single-molecule spectroscopy that are changing the ways we think about molecules and atoms The Advances in Chemical Physics series provides the chemical physics field with a forum for critical, authoritative evaluations of advances in every area of the discipline. This latest volume explores the advent of optical single-molecule spectroscopy, and how atomic force microscopy has empowered novel experiments on individual biomolecules, opening up new frontiers in molecular and cell biology and leading to new theoretical approaches and insights. Organized into two parts—one experimental, the other theoretical—this volume explores advances across the field of single-molecule biophysics, presenting new perspectives on the theoretical properties of atoms and molecules. Single-molecule experiments have provided fresh perspectives on questions such as how proteins fold to specific conformations from highly heterogeneous structures, how signal transductions take place on the molecular level, and how proteins behave in membranes and living cells.This volume is designed to further contribute to the rapid development of single-molecule biophysics research. Filled with cutting-edge research reported in a cohesive manner not found elsewhere in the literature, each volume of the Advances in Chemical Physics series serves as the perfect supplement to any advanced graduate class devoted to the study of chemical physics.

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Автор: James Walvin

Slavery in Small Things: Slavery and Modern Cultural Habits isthe first book to explore the long-range cultural legacy of slavery through commonplace daily objects. Offers a new and original approach to the history of slavery by an acknowledged expert on the topic Traces the relationship between slavery and modern cultural habits through an analysis of commonplace objects that include sugar, tobacco, tea, maps, portraiture, print, and more Represents the only study that utilizes common objects to illustrate the cultural impact and legacy of the Atlantic slave trade Makes the topic of slavery accessible to a wider public audience

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Автор: Группа авторов

The combination of heat pumps and solar components is a recent development and has great potential for improving the energy efficiency of house and hot water heating systems. As a consequence, it can enhance the energy footprint of a building substantially. This work compares different systems, analyses their performance and illustrates monitoring techniques. It helps the reader to design, simulate and assess solar and heat pump systems. Good examples of built systems are discussed in detail and advice is given on how to design the most efficient system. This book is the first one about this combination of components and presents the state of the art of this technology. It is based on a joint research project of two programmes of the International Energy Agency: the Solar Heating and Cooling Programme (SHC) and the Heat Pump Programme. More than 50 experts from 13 countries have participated in this research.

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Автор: Группа авторов

Исполнители: Авточтец

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Автор: Marcel Swart

It has long been recognized that metal spin states play a central role in the reactivity of important biomolecules, in industrial catalysis and in spin crossover compounds. As the fields of inorganic chemistry and catalysis move towards the use of cheap, non-toxic first row transition metals, it is essential to understand the important role of spin states in influencing molecular structure, bonding and reactivity. Spin States in Biochemistry and Inorganic Chemistry provides a complete picture on the importance of spin states for reactivity in biochemistry and inorganic chemistry, presenting both theoretical and experimental perspectives. The successes and pitfalls of theoretical methods such as DFT, ligand-field theory and coupled cluster theory are discussed, and these methods are applied in studies throughout the book. Important spectroscopic techniques to determine spin states in transition metal complexes and proteins are explained, and the use of NMR for the analysis of spin densities is described. Topics covered include: DFT and ab initio wavefunction approaches to spin states Experimental techniques for determining spin states Molecular discovery in spin crossover Multiple spin state scenarios in organometallic reactivity and gas phase reactions Transition-metal complexes involving redox non-innocent ligands Polynuclear iron sulfur clusters Molecular magnetism NMR analysis of spin densities This book is a valuable reference for researchers working in bioinorganic and inorganic chemistry, computational chemistry, organometallic chemistry, catalysis, spin-crossover materials, materials science, biophysics and pharmaceutical chemistry.

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Автор: Группа авторов

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Автор: Iwao Teraoka

This textbook introduces chemistry and chemical engineering students to molecular descriptions of thermodynamics, chemical systems, and biomolecules. Equips students with the ability to apply the method to their own systems, as today's research is microscopic and molecular and articles are written in that language Provides ample illustrations and tables to describe rather difficult concepts Makes use of plots (charts) to help students understand the mathematics necessary for the contents Includes practice problems and answers

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Автор: Группа авторов

This book is a unique guide to emerging stem cell technologies and the opportunities for their commercialisation. It provides in-depth analyses of the science, business, legal, and financing fundamentals of stem cell technologies, offering a holistic assessment of this emerging and dynamic segment of the field of regenerative medicine. • Reviews the very latest advances in the technology and business of stem cells used for therapy, research, and diagnostics • Identifies key challenges to the commercialisation of stem cell technology and avenues to overcome problems in the pipeline • Written by an expert team with extensive experience in the business, basic and applied science of stem cell research This comprehensive volume is essential reading for researchers in cell biology, biotechnology, regenerative medicine, and tissue engineering, including scientists and professionals, looking to enter commercial biotechnology fields.

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Автор: Daniel Lednicer

The term steroid has become virtually synonymous with drug abuse in sport to the majority of the public. However these steroids – androgens – actually comprise only a single relatively small class of biologically active steroids, and are overshadowed by a large collection of compounds, a sizeable number of which are commercial drugs that share the same structural carbon skeleton. The development of these drugs has led to a large body of organic chemistry often denoted as «Steroid Chemistry». Steroid Chemistry At A Glance provides a concise overview of the main principles and reactions of steroid chemistry. Topics covered include: history, isolation and structure determination of steroids steroid nomenclature and stereochemistry natural sources of steroids synthesis and reactions of aromatic a-ring steroids, androstanes, and pregnanes steroids with a spirolactone at position 17 steroids with hetrocyclic ring A compounds derived from cholesterol Based on the highly successful and student friendly «at a glance» approach, the information is presented in integrated, self contained double page spreads of text and illustrative material. Students of chemistry and pharmacy using Steroid Chemistry at a Glance will find they have a resource with which they can quickly, concisely and confidently acquire, regularly review and revise the basic facts that underpin the properties, synthesis and reactions of this important class of natural products. It will also serve as a handy bench reference for postgraduates and professional chemists.

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Автор: Boris Harlamov

The author investigates the Cramer –Lundberg model, collecting the most interesting theorems and methods, which estimate probability of default for a company of insurance business. These offer different kinds of approximate values for probability of default on the base of normal and diffusion approach and some special asymptotic.

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Автор: Yan-Gang Zhao

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Автор: Группа авторов

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Автор: Группа авторов

Explore the theory and applications of superatomic clusters and cluster assembled materials Superatoms: Principles, Synthesis and Applications  delivers an insightful and exciting exploration of an emerging subfield in cluster science, superatomic clusters and cluster assembled materials. The book presents discussions of the fundamentals of superatom chemistry and their application in catalysis, energy, materials science, and biomedical sciences. Readers will discover the foundational significance of superatoms in science and technology and learn how they can serve as the building blocks of tailored materials, promising to usher in a new era in materials science. The book covers topics as varied as the thermal and thermoelectric properties of cluster-based materials and clusters for CO2 activation and conversion, before concluding with an incisive discussion of trends and directions likely to dominate the subject of superatoms in the coming years. Readers will also benefit from the inclusion of: A thorough introduction to the rational design of superatoms using electron-counting rules Explorations of superhalogens, endohedrally doped superatoms and assemblies, and magnetic superatoms A practical discussion of atomically precise synthesis of chemically modified superatoms A concise treatment of superatoms as the building blocks of 2D materials, as well as superatom-based ferroelectrics and cluster-based materials for energy harvesting and storage Perfect for academic researchers and industrial scientists working in cluster science, energy materials, thermoelectrics, 2D materials, and CO2 conversion,  Superatoms: Principles, Synthesis and Applications  will also earn a place in the libraries of interested professionals in chemistry, physics, materials science, and nanoscience.

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Автор: Группа авторов

This unique book gives a timely overview about the fundamentals and applications of supported ionic liquids in modern organic synthesis. It introduces the concept and synthesis of SILP materials and presents important applications in the field of catalysis (e.g. hydroformylation, hydrogenation, coupling reactions, fine chemical synthesis) as well as energy technology and gas separation. Written by pioneers in the field, this book is an invaluable reference book for organic chemists in academia or industry.

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Автор: Группа авторов

Provides deep insight into the concepts and recent developments in the area of supramolecular chemistry in water Written by experts in their respective field, this comprehensive reference covers various aspects of supramolecular chemistry in water?from fundamental aspects to applications. It provides readers with a basic introduction to the current understanding of the properties of water and how they influence molecular recognition, and examines the different receptor types available in water and the types of substrates that can be bound. It also looks at areas to where they can be applied, such as materials, optical sensing, medicinal imaging, and catalysis. Supramolecular Chemistry in Water offers five major sections that address important topics like water properties, molecular recognition, association and aggregation phenomena, optical detection and imaging, and supramolecular catalysis. It covers chemistry and physical chemistry of water; water-mediated molecular recognition; peptide and protein receptors; nucleotide receptors; carbohydrate receptors; and ion receptors. The book also teaches readers all about coordination compounds; self-assembled polymers and gels; foldamers; vesicles and micelles; and surface-modified nanoparticles. In addition, it provides in-depth information on indicators and optical probes, as well as probes for medical imaging. -Covers, in a timely manner, an emerging area in chemistry that is growing more important every day -Addresses topics such as molecular recognition, aggregation, catalysis, and more -Offers comprehensive coverage of everything from fundamental aspects of supramolecular chemistry in water to its applications -Edited by one of the leading international scientists in the field Supramolecular Chemistry in Water is a one-stop-resource for all polymer chemists, catalytic chemists, biochemists, water chemists, and physical chemists involved in this growing area of research.

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Автор: Jonathan W. Steed

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Автор: Andreas Winter

Explore modern characterization methods and new applications in this modern overview of supramolecular polymer chemistry    Supramolecular Polymers and Assemblies: From Synthesis to Properties and Applications  delivers a superlative summary and description of general concepts and definitions in the field. The book offers informative and accessible treatments of crucial concepts like metal-containing compounds, hydrogen bonding, ionic interactions, pi-pi stacking, and more.  Characterization remains a primary focus of the book throughout, making it extremely useful for practitioners in the field. Emphasis is also placed on metallo-supramolecular polymers and materials which have found applications in areas like smart or intelligent materials and systems with special photochemical and photophysical properties, like LEDs and solar cells. Applications, including self-healing materials, opto-electronics, sensing, and catalysis are all discussed as well.  The book details many of the exciting developments in the field of supramolecular chemistry that have occurred since the 1987 Nobel Prize was awarded to pioneers in this rapidly developing field. Readers will also benefit from the inclusion of:  A thorough introduction to supramolecular assemblies based on ionic interactions Explorations of supramolecular polymers based on hydrogen-bonding interactions, metal-to-ligand interactions, p-Electronic interactions, crown-ether recognition, cucurbiturils, and host-guest chemistry of calixarenes A discussion of cyclodextrins in the field of supramolecular polymers Examinations of supramolecular polymers based on the host-guest chemistry of pillarenes, and those formed by orthogonal non-covalent interactions A treatment of the characterization of supramolecular polymers  Supramolecular Polymers and Assemblies: From Synthesis to Properties and Applications will earn a place in the libraries of researchers and practitioners of the material science, as well as polymer chemists seeding a one-stop reference for supramolecular polymers.

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Автор: Bjorn Lindman

This book gives the reader an introduction to the field of surfactants in solution as well as polymers in solution. Starting with an introduction to surfactants the book then discusses their environmental and health aspects. Chapter 3 looks at fundamental forces in surface and colloid chemistry. Chapter 4 covers self-assembly and 5 phase diagrams. Chapter 6 reviews advanced self-assembly while chapter 7 looks at complex behaviour. Chapters 8 to 10 cover polymer adsorption at solid surfaces, polymers in solution and surface active polymers, respectively. Chapters 11 and 12 discuss adsorption and surface and interfacial tension, while Chapters 13- 16 deal with mixed surfactant systems. Chapter 17, 18 and 19 address microemulsions, colloidal stability and the rheology of polymer and surfactant solutions. Wetting and wetting agents, hydrophobization and hydrophobizing agents, solid dispersions, surfactant assemblies, foaming, emulsions and emulsifiers and microemulsions for soil and oil removal complete the coverage in chapters 20-25.

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Автор: Группа авторов

This book addresses surface modification techniques, which are critical for tailoring and broadening the applications of naturally occurring biopolymers. Biopolymers represent a sustainable solution to the need for new materials in the auto, waste removal, biomedical device, building material, defense, and paper industries. Features: First comprehensive summary of biopolymer modification methods to enhance compatibility, flexibility, enhanced physicochemical properties, thermal stability, impact response, and rigidity, among others Address of a green, eco-friendly materials that is increasing in use, underscoring the roles of material scientists in the future of new «green» bioolymer material use Coverage applications in automotive development, hazardous waste removal, biomedical engineering, pulp and paper industries, development of new building materials, and defense-related technologies Facilitation of technology transfer

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Автор: Keith Scott

Sustainable and Green Electrochemical Science and Technology brings together the basic concepts of electrochemical science and engineering and shows how these are applied in an industrial context, emphasising the major role that electrochemistry plays within society and industry in providing cleaner, greener and more sustainable technologies. Electrochemistry has many applications for sustainability; it can be used to store energy, synthesise materials and chemicals, to generate power and to recycle valuable resources. Coverage includes Electrochemistry, Electrocatalysis and Thermodynamics Electrochemical Cells, Materials and Reactors Carbon Dioxide Reduction and Electro-Organic Synthesis Hydrogen production and Water Electrolysis Inorganic Synthesis Electrochemical Energy Storage and Power Sources Electrochemical processes for recycling and resource recovery Fuel Cell Technologies This book is targeted at both industrial and academic readers, providing a good technological reference base for electrochemistry. It will enable the reader to build on basic principles of electrochemistry, and takes these through to cell design for various and diverse applications.

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Автор: Huaqiang Cao

Authored by a leading figure in the field, this book systematically describes all the fundamental aspects and applications of inorganic nanostructures from zero to three dimensions. It not only discusses various synthesis technologies, but also covers the physical properties of inorganic nanostructures, such as optical, electric and magnetic properties, and practical applications such as energy storage (including Li-ion and Ni-MH batteries and supercapacitors), superhydrophobic and bio-applications, etc. The focus throughout is on the synthesis-structure-application relationships, including the growth mechanisms for the nanostrucutres. Concise yet comprehensive, this is indispensable reading for chemists and materials scientists.

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