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Author: Zhifeng Xue Publisher: Logos Verlag Berlin GmbH ISBN: 3832528482 Category : Science Languages : en Pages : 262
Book Description
In the present work the carboxylic acid dimers and water clusters are chosen as model systems of strong and moderately strong hydrogen bonds and studied with spontaneous Raman spectroscopy coupled with a supersonic jet expansion. The spectra of several carboxylic acids are measured and assigned in the entire fundamental wavenumber region. An overview of their vibrations is achieved by comparing our experimental results with former experimental results as well as with quantum chemical calculations. For the first time, we know from experiment how anharmonic the hydrogen bond vibrations of formic acid are and it is proved that the hydrogen bond becomes stiffer when moving from formic acid to acetic acid. Now there is a very complete spectroscopic data base for formic acid dimer, which can be used to rigorously test quantum chemical calculations. Besides, we finally know from experiment how strongly the OH oscillators are coupled to each other in the simplest ring clusters of water. All this was only possible by the use of spontaneous Raman scattering in supersonic expansions, which is a really powerful tool to investigate hydrogen bonded systems.
Author: Zhifeng Xue Publisher: Logos Verlag Berlin GmbH ISBN: 3832528482 Category : Science Languages : en Pages : 262
Book Description
In the present work the carboxylic acid dimers and water clusters are chosen as model systems of strong and moderately strong hydrogen bonds and studied with spontaneous Raman spectroscopy coupled with a supersonic jet expansion. The spectra of several carboxylic acids are measured and assigned in the entire fundamental wavenumber region. An overview of their vibrations is achieved by comparing our experimental results with former experimental results as well as with quantum chemical calculations. For the first time, we know from experiment how anharmonic the hydrogen bond vibrations of formic acid are and it is proved that the hydrogen bond becomes stiffer when moving from formic acid to acetic acid. Now there is a very complete spectroscopic data base for formic acid dimer, which can be used to rigorously test quantum chemical calculations. Besides, we finally know from experiment how strongly the OH oscillators are coupled to each other in the simplest ring clusters of water. All this was only possible by the use of spontaneous Raman scattering in supersonic expansions, which is a really powerful tool to investigate hydrogen bonded systems.
Author: Nils Olaf Bernd Lüttschwager Publisher: Springer ISBN: 3319085662 Category : Science Languages : en Pages : 193
Book Description
This thesis identifies the turning point in chain length, after which alkanes self-solvate into a folded structure instead of an extended stretched conformation. After this turning point, London dispersion forces rearrange isolated n-alkanes into a particular hairpin-structure, while for shorter chain lengths, a simple stretched conformation is energetically preferred. This thesis can locate the experimental turning point for the first time in an interaction-free manner from measurements of unbranched alkanes at low temperatures in supersonic jet expansions. It contains a detailed analysis of the vibrational Raman spectra of the chain molecules, which is supported by comprehensive quantum chemical simulations. In this way, the detailed balance between inter-chain attraction and conformational flexibility can be quantified. The investigations are complemented by measurements of perfluoroalkanes and similarities and differences between the compounds are discussed. Furthermore, Nils Lüttschwager determines the stiffnesses (elastic moduli) of two of the most common industrial polymers: polyethylene and polytetrafluorethylene. He uses in this thesis a sophisticated extrapolation to calculate this value from quantities of their building blocks, showing that the single polymer molecules can be as stiff as a rod of steel.
Author: Ji-Xin Cheng Publisher: Elsevier ISBN: 0323903371 Category : Science Languages : en Pages : 612
Book Description
Stimulated Raman Scattering Microscopy: Techniques and Applications describes innovations in instrumentation, data science, chemical probe development, and various applications enabled by a state-of-the-art stimulated Raman scattering (SRS) microscope. Beginning by introducing the history of SRS, this book is composed of seven parts in depth including instrumentation strategies that have pushed the physical limits of SRS microscopy, vibrational probes (which increased the SRS imaging functionality), data science methods, and recent efforts in miniaturization. This rapidly growing field needs a comprehensive resource that brings together the current knowledge on the topic, and this book does just that. Researchers who need to know the requirements for all aspects of the instrumentation as well as the requirements of different imaging applications (such as different types of biological tissue) will benefit enormously from the examples of successful demonstrations of SRS imaging in the book. Led by Editor-in-Chief Ji-Xin Cheng, a pioneer in coherent Raman scattering microscopy, the editorial team has brought together various experts on each aspect of SRS imaging from around the world to provide an authoritative guide to this increasingly important imaging technique. This book is a comprehensive reference for researchers, faculty, postdoctoral researchers, and engineers. - Includes every aspect from theoretic reviews of SRS spectroscopy to innovations in instrumentation and current applications of SRS microscopy - Provides copious visual elements that illustrate key information, such as SRS images of various biological samples and instrument diagrams and schematics - Edited by leading experts of SRS microscopy, with each chapter written by experts in their given topics
Author: Bin Liang Publisher: Elsevier ISBN: 0443141711 Category : Science Languages : en Pages : 671
Book Description
Water Security: Big Data-Driven Risk Identification, Assessment and Control of Emerging Contaminants contains the latest information on big data-driven risk detection and analysis, risk assessment and environmental health effect, intelligent risk control technologies, and global control strategy of emerging contaminants. First, this book highlights advances and challenges throughout the detection of emerging chemical contaminants (e.g., antimicrobials, microplastics) by sensors or mass spectrometry, as well as emerging biological contaminant (e.g., ARGs, pathogens) by a combination of next- and third-generation sequencing technologies in aquatic environment. Second, it discusses in depth the ecological risk assessment and environmental health effects of emerging contaminants. Lastly, it presents the most up-to-date intelligent risk management technologies. This book shares instrumental global strategy and policy analysis on how to control emerging contaminants. Offering interdisciplinary and global perspectives from experts in environmental sciences and engineering, environmental microbiology and microbiome, environmental informatics and bioinformatics, intelligent systems, and knowledge engineering, this book provides an accessible and flexible resource for researchers and upper level students working in these fields. - Covers the detection, high-throughput analyses, and environmental behavior of the typical emerging chemical and biological contaminants - Focuses on chemical and biological big data driven aquatic ecological risk assessment models and techniques - Highlights the intelligent management and control technologies and policies for emerging contaminants in water environments
Author: Janos Mink Publisher: Springer Science & Business Media ISBN: 3709168406 Category : Technology & Engineering Languages : en Pages : 742
Book Description
19 plenary lectures and 203 poster papers presented at the 10th International Conference of Fourier Transform Spectroscopy in Budapest 1995 give an overview on the state-of-the art of this technology and its wide range of applications. The reader will get information on any aspects of FTS including the latest instrumental developments, e.g. in diode array detection, time resolution FTS, microscopy and spectral mapping, double modulation and two-dimensional FTS.
Author: Ketul Popat Publisher: CRC Press ISBN: 1439801428 Category : Mathematics Languages : en Pages : 304
Book Description
Although nanotechnology applied to medicine has a potentially huge impact on drug delivery and tissue engineering, significant challenges need to be resolved before clinically viable nanomedicine or nanobiomedicine therapies will be available. Skillfully edited, with contributions from an expert panel of researchers, Referred to as "nanomedicine" or "nanobiomedicine," the application of nanotechnology to medicine can impact diagnosis, monitoring, and treatment of diseases, as well as the control and understanding of biological systems. Bringing together an unparalleled field of experts, this volume explores various aspects of nanotechnology and its applications in biomedical fields. The book uses an application-oriented approach to relate laboratory-based research to the development of technologies that are easily adaptable to an industry environment, focusing chiefly on drug delivery, tissue engineering, and regenerative medicine.
Author: Yukihiro Ozaki Publisher: Academic Press ISBN: 0128186119 Category : Science Languages : en Pages : 609
Book Description
Vibrational Spectroscopy in Protein Research offers a thorough discussion of vibrational spectroscopy in protein research, providing researchers with clear, practical guidance on methods employed, areas of application, and modes of analysis. With chapter contributions from international leaders in the field, the book addresses basic principles of vibrational spectroscopy in protein research, instrumentation and technologies available, sampling methods, quantitative analysis, origin of group frequencies, and qualitative interpretation. In addition to discussing vibrational spectroscopy for the analysis of purified proteins, chapter authors also examine its use in studying complex protein systems, including protein aggregates, fibrous proteins, membrane proteins and protein assemblies. Emphasis throughout the book is placed on applications in human tissue, cell development, and disease analysis, with chapters dedicated to studies of molecular changes that occur during disease progression, as well as identifying changes in tissues and cells in disease studies. - Provides thorough guidance in implementing cutting-edge vibrational spectroscopic methods from international leaders in the field - Emphasizes in vivo, in situ and non-invasive analysis of proteins in biomedical and life science research more broadly - Contains chapters that address vibrational spectroscopy for the study of simple purified proteins and protein aggregates, fibrous proteins, membrane proteins and protein assemblies
Author: Poonam Mishra Publisher: CRC Press ISBN: 0429522061 Category : Science Languages : en Pages : 274
Book Description
Biosensors in food safety and quality have become indispensable in today’s world due to the requirement of food safety and security for human health and nutrition. This book covers various types of sensors and biosensors that can be used for food safety and food quality monitoring, but these are not limited to conventional sensors, such as temperature sensors, optical sensors, electrochemical sensors, calorimetric sensors, and pH sensors. The chapters are framed in a way that readers can experience the novel fabrication procedures of some advanced sensors, including lab-on-a-chip biosensors, IoT-based sensors, microcontroller-based sensors, and so on, particularly for fruits and vegetables, fermented products, plantation products, dairy-based products, heavy metal analysis in water, meat, fish, etc. Its simplistic presentation and pedagogical writing provide the necessary thrust and adequate information for beginners, scientists, and researchers. The book offers comprehensive coverage of the most essential topics, which include the following: Fundamentals of biosensors Overview of food safety and quality analysis Major toxicants of food and water Fabrication techniques of biosensors applicable for different segments of the food industry This book serves as a reference for scientific investigators who work on the assurance of food safety and security using biosensing principles as well as researchers developing biosensors for food analysis. It may also be used as a textbook for graduate-level courses in bioelectronics.
Author: Zhifeng Xue
Author: Zhifeng Xue
Author: Nils Olaf Bernd Lüttschwager
Author: Ji-Xin Cheng
Author: Bin Liang
Author: Janos Mink
Author: Bunshi Kagaku Kenkyūjo
Author: Ketul Popat
Author: Yukihiro Ozaki
Author: Poonam Mishra
Author: