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Record Nr. |
UNINA9910144405803321 |
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Autore |
Stokes Debbie |
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Titolo |
Principles and practice of variable pressure/environmental scanning electron microscopy (VP-ESEM) [[electronic resource] /] / Debbie J. Stokes |
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Pubbl/distr/stampa |
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Chichester, U.K., : Wiley, 2008 |
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ISBN |
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1-282-34350-5 |
9786612343506 |
0-470-75873-2 |
0-470-75874-0 |
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Descrizione fisica |
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1 online resource (235 p.) |
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Collana |
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RMS - Royal Microscopical Society |
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Classificazione |
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Disciplina |
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Soggetti |
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Scanning electron microscopy |
Microscopy |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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"Published in association with the Royal Microscopical Society." |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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Principles and Practice of Variable Pressure/Environmental Scanning Electron Microscopy (VP-ESEM); Contents; Preface; 1 A Brief Historical Overview; 1.1 Scanning Electron Microscopy; 1.1.1 The Beginnings; 1.1.2 The Need for Added Capabilities; 1.2 The Development of Imaging in a Gas Environment; 1.2.1 Overcoming the Limits of Conventional SEM; 1.2.2 Leaps and Bounds; 2 Principles of SEM; 2.1 Introduction; 2.1.1 Why Use An Electron Beam?; 2.1.2 The SEM Column; 2.1.3 Why Do We Need a Vacuum System?; 2.2 Electron Sources; 2.2.1 Thermionic Emission Sources; 2.2.2 Field Emission Sources |
2.3 Electron Optics2.3.1 Lenses; 2.3.2 Lens Aberrations; 2.4 Signals and Detection; 2.4.1 Primary Electrons and the Interaction Volume; 2.4.2 Backscattered Electrons; 2.4.3 Secondary Electrons; 2.4.4 X-ray Radiation; 2.4.5 Cathodoluminescence; 2.5 Practical Aspects of Electron Beam Irradiation; 2.5.1 Radiation Damage; 2.5.2 Minimising Specimen Charging - Low-Voltage SEM; 2.5.3 Increasing Surface and Bulk Conductivities; 2.6 SEM in Operation; 2.6.1 Building Up an Image; 2.6.2 Magnification; 2.6.3 Signal-to-Noise Ratio; 2.6.4 Contrast; 2.6.5 Adjusting the Contrast; 2.6.6 Resolution |
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2.6.7 Depth of Field2.6.8 Image Capture; 3 General Principles of VP-ESEM: Utilising a Gas; 3.1 Introduction; 3.2 VP-ESEM Instrumentation; 3.2.1 Typical Features; 3.2.2 Primary Electron Scattering in VP-ESEM - the General Case; 3.2.3 Units of Pressure; 3.3 Signal Generation in a Gas; 3.3.1 Introduction; 3.3.2 Direct Collection of Electrons and Ions; 3.3.3 Collection of Photons - the Gas Luminescence Signal; 3.3.4 Detecting Indirect Electron and Ion Currents; 3.4 Imaging with Water Vapour; 3.4.1 Introduction; 3.4.2 Thermodynamic Equilibria; 3.4.3 Nonequilibrium Conditions |
3.4.4 Practicalities of Stabilising Hydrated Specimens4 Imaging and Analysis in VP-ESEM: The Influence of a Gas; 4.1 Introduction; 4.2 Background to Theoretical Calculations; 4.2.1 Calculating the Mean Free Paths of Primary Electrons; 4.2.2 Calculating Pressure-Dependent Variables; 4.2.3 Estimating the 'Useful' Primary Electron Current; 4.3 Which Gas?; 4.3.1 Introduction; 4.3.2 Usefulness of the Gas - Experimental Conditions; 4.3.3 Ionisation and Excitation for Different Gases; 4.3.4 Scattering of the Primary Electron Beam in Different Gases; 4.4 Exploring the Gas Path Length |
4.4.1 Introduction4.4.2 Influence of GPL on the Skirt Radius; 4.4.3 Gas Path Length and Useful Primary Electron Beam Current; 4.4.4 Constraints on Reducing the Gas Path Length; 4.4.5 Separating Gas Path Length from Working Distance; 4.5 How Much Gas?; 4.5.1 Introduction; 4.5.2 Scattering of Primary Electrons as a Function of Pressure; 4.6 X-ray Microanalysis in VP-ESEM; 4.6.1 Introduction; 4.6.2 Effects of Chamber Gas on X-ray Signals; 4.6.3 Considerations for Minimising the Effects of the Gas; 4.6.4 Post-Acquisition Methods to Correct for Scattering |
5 Imaging Uncoated Specimens in the VP-ESEM |
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Sommario/riassunto |
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Offers a simple starting point to VPSEM, especially for new users, technicians and students containing clear, concise explanationsCrucially, the principles and applications outlined in this book are completely generic: i.e. applicable to all types of VPSEM, irrespective of manufacturer.Information presented will enable reader to turn principles into practicePublished in association with the Royal Microscopical Society (RMS) -www.rms.org.uk |
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2. |
Record Nr. |
UNINA9910765723803321 |
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Titolo |
Food proteins and bioactive peptides / / edited by Maria Hayes |
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Pubbl/distr/stampa |
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Basel : , : MDPI, , [2018] |
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©2018 |
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ISBN |
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Descrizione fisica |
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1 online resource (vi, 172 pages) |
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Disciplina |
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Soggetti |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Sommario/riassunto |
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This book will look at the advances made in the generation, extraction, and characterisation of bioactive peptides from different food and gut protein sources, in addition to examining the increased potential and novel uses of these peptides in functional foods and pharmaceuticals for health. Novel extraction methods will be discussed along with protein identification methods and the application of peptides in gut health and in the prevention of diseases associated with metabolic syndrome, including diabetes, heart disorders, obesity, and inflammation. |
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