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  • 1
    Online Resource
    Online Resource
    Dordrecht : Springer Netherlands
    ISBN: 9789400934177
    Language: English
    Pages: Online-Ressource (XIV, 321 p) , online resource
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Green Coffee Processing -- 1. Introduction -- 2. Dry Processing Method -- 3. Wet Processing Method -- 4. Curing -- 5. Storage -- 6. Handling -- References -- 2 Grading, Storage, Pre-treatments and Blending -- 1. Introduction -- 2. Marketed Grades -- 3. Storage -- 4. Pre-treatments -- 5. Selection and Blending -- References -- 3 Decaffeination of Coffee -- 1. Introduction -- 2. Solvent Decaffeination -- 3. Water Decaffeination -- 4. Supercritical Carbon Dioxide Decaffeination -- 5. Decaffeination of Roasted Coffee and Extract -- 6. Caffeine Refining -- References -- 4 Roasting and Grinding -- 1. Introduction -- 2. Process Factors in Roasting -- 3. Roasting Equipment -- 4. Process Factors in Grinding -- References -- 5 Extraction -- 1. Introduction -- 2. Mechanisms and Methods -- 3. Process Equipment -- References -- 6 Drying -- 1. Introduction -- 2. Process Factors in Spray-drying -- 3. Process Factors in Freeze-drying -- 4. Process Factors in Pre-concentration -- 5. Process Equipment -- References -- 7 Packing of Roast and Instant Coffee -- 1. Introduction -- 2. Packing of Roast Whole Bean Coffee -- 3. Packing of Roast and Ground Coffee -- 4. Packing of Instant Coffee -- 5. Packing Equipment -- References -- 8 Home and Catering Brewing of Coffee G. PICTET -- 1. Introduction -- 2. Bibliographic Review -- 3. Personal Research -- 4. General Conclusions -- References -- 9 Waste Products -- 1. Primary Processing: the Production of Green Coffee -- 2. Secondary Processing: the Production of Instant Coffee -- References -- 1. Units -- 1.1. SI base units -- 1.2. Some SI derived units used in engineering -- 1.3. Some prefixes for SI units -- 1.4. Some conversions of SI and non-SI units -- 1.5. Dimensionless units used -- 2. Symbols for Physical Quantities in Equations -- 3. Abbreviations -- 4. Flavour Terminology -- 5. Process Engineering Terminology -- 5.1. Food engineering and unit operations -- 6. Listing of British and International Standards Relating to Coffee.
    Abstract: The present volume, Volume 2 in this planned series on coffee, deals with processing and follows on naturally from the first volume on the chemistry of coffee, which described its numerous constituents in the green (raw) and various product forms. We have already remarked that coffee has great compositional complex­ ity, and this complexity of understanding extends when we come to that is, the many processes involved in the roasting consider its processing; of green coffee and its subsequent conversion into a consumable brew, especially through extraction and drying into an instant coffee. The simple brewing of roasted and ground coffee with water in the home also possesses considerable mystique and needs know-how for optimal results. The choice of green coffees from an almost bewildering array of different types available, through species/variety differences and different methods of processing from the coffee cherry to the green coffee bean, needs understanding and guidance. Furthermore, various forms of pre-treatment of green coffee before roasting are available. Some of these are little known, but others such as decaffeination, for those who desire roasted or instant coffee with little or no caffeine, are now becoming well established. Finally, both the processing of coffee cherries to coffee beans, leaving a range of different waste products (pulp, hulls, husk, parchment, etc.), and of roasted coffee after industrial aqueous extraction, leaving spent coffee grounds, provide waste products that have found considerable commercial value in different ways.
    Description / Table of Contents: 1 Green Coffee Processing1. Introduction -- 2. Dry Processing Method -- 3. Wet Processing Method -- 4. Curing -- 5. Storage -- 6. Handling -- References -- 2 Grading, Storage, Pre-treatments and Blending -- 1. Introduction -- 2. Marketed Grades -- 3. Storage -- 4. Pre-treatments -- 5. Selection and Blending -- References -- 3 Decaffeination of Coffee -- 1. Introduction -- 2. Solvent Decaffeination -- 3. Water Decaffeination -- 4. Supercritical Carbon Dioxide Decaffeination -- 5. Decaffeination of Roasted Coffee and Extract -- 6. Caffeine Refining -- References -- 4 Roasting and Grinding -- 1. Introduction -- 2. Process Factors in Roasting -- 3. Roasting Equipment -- 4. Process Factors in Grinding -- References -- 5 Extraction -- 1. Introduction -- 2. Mechanisms and Methods -- 3. Process Equipment -- References -- 6 Drying -- 1. Introduction -- 2. Process Factors in Spray-drying -- 3. Process Factors in Freeze-drying -- 4. Process Factors in Pre-concentration -- 5. Process Equipment -- References -- 7 Packing of Roast and Instant Coffee -- 1. Introduction -- 2. Packing of Roast Whole Bean Coffee -- 3. Packing of Roast and Ground Coffee -- 4. Packing of Instant Coffee -- 5. Packing Equipment -- References -- 8 Home and Catering Brewing of Coffee G. PICTET -- 1. Introduction -- 2. Bibliographic Review -- 3. Personal Research -- 4. General Conclusions -- References -- 9 Waste Products -- 1. Primary Processing: the Production of Green Coffee -- 2. Secondary Processing: the Production of Instant Coffee -- References -- 1. Units -- 1.1. SI base units -- 1.2. Some SI derived units used in engineering -- 1.3. Some prefixes for SI units -- 1.4. Some conversions of SI and non-SI units -- 1.5. Dimensionless units used -- 2. Symbols for Physical Quantities in Equations -- 3. Abbreviations -- 4. Flavour Terminology -- 5. Process Engineering Terminology -- 5.1. Food engineering and unit operations -- 6. Listing of British and International Standards Relating to Coffee.
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  • 2
    Online Resource
    Online Resource
    Dordrecht : Springer Netherlands
    ISBN: 9789400949485
    Language: English
    Pages: Online-Ressource , online resource
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Science.
    Abstract: 1 Introduction -- 1. Origins -- 2. The Coffee Plant -- 3. Producing Countries -- 4. Agricultural Practices -- 5. Processing at Origin -- 6. Roasted Coffee -- 7. Soluble (Instant) Coffee -- 8. Decaffeination -- 9. Composition -- 10. Physiological Effects -- 11. Coffee Quality -- 12. Coffee Substitutes -- References -- 2 Water and Mineral Contents -- 1. Introduction -- 2. Water Content of Green Coffee -- 3. Water Content of Parchment Coffee -- 4. Water Content of Roasted Coffee -- 5. Water Content of Instant Coffee -- 6. Water Content of Coffee Extracts -- 7. Mineral Content of Green and Roasted Coffee -- 8. Mineral Content of Instant Coffee -- 9. Trace Elements in Coffees -- References -- 3 Carbohydrates -- 1. Carbohydrates of Green Coffee -- 2. Carbohydrates of Roasted Coffee -- 3. Carbohydrates of Coffee Brews, Extracts and Instant Coffee -- 4. Some Physical Properties of Coffee Carbohydrates -- 5. Determination of Carbohydrates -- References -- 4 Nitrogenous Components -- 1. Introduction -- 2. Alkaloids (Caffeine) -- 3. Trigonelline -- 4. Nicotinic Acid -- 5. Proteins and Free Amino Acids -- References -- 5 Chlorogenic Acids -- 1. Introduction and Brief History -- 2. Chlorogenic Acids Nomenclature -- 3. Chemical Synthesis -- 4. Physical Properties -- 5. Origin and Function -- 6. Chlorogenic Acids Extraction and Analysis -- 7. Chlorogenic Acids Content in Green Coffee Beans -- 8. Chlorogenic Acids Content of Roasted Beans and Soluble Powders -- 9. Organoleptic Properties -- References -- 6 Lipids -- 1. Introduction -- 2. Coffee Oil -- 3. Coffee Wax -- References -- 7 Volatile Components -- 1. Preamble -- 2. Methodology -- 2.5. Summary -- 3. The Nature of the Volatile Components of Coffee -- References -- 8 Carboxylic Acids -- 1. The Role of Acids in Infusions -- 2. The Acid Content of Green Coffee -- 3. The Acid Content of Roasted Coffee -- 4. The Acid Content of Dried Coffee Extracts (Instant Coffees) -- 5. Determination of Acids -- 6. The Origins of Acids Found in Coffee Infusions -- References.
    Abstract: The term 'coffee' comprises not only the consumable beverage obtained by extracting roasted coffee with hot water, but also a whole range of intermediate products starting from the freshly harvested coffee cherries. Green coffee beans are, however, the main item of international trade (believed second in importance only to oiI), for processing into roasted coffee, instant coffee and other coffee products, prepared for local consumers. The scientific and technical study of coffee in its entirety therefore involves a wide range of scientific disciplines and practical skills. It is evident that green coffee is a natural product of great compositional complexity, and this is even more true for coffee products deriving from the roasting of coffee. The present volume on the chemistry of coffee seeks to provide the re ader with a full and detailed synopsis of present knowledge on the chemical aspects of green, roasted and instant coffee, in a way which has not been attempted before, that is, within the confines of a single volume solely devoted to the subject. Each chapter is directed towards a separate generic group of constituents known to be present, ranging individually over carbohydrate, nitrogenous and lipid components, not forgetting the important aroma components of roasted coffee, nor the water present and its significance, together with groups of other important components.
    Description / Table of Contents: 1 Introduction1. Origins -- 2. The Coffee Plant -- 3. Producing Countries -- 4. Agricultural Practices -- 5. Processing at Origin -- 6. Roasted Coffee -- 7. Soluble (Instant) Coffee -- 8. Decaffeination -- 9. Composition -- 10. Physiological Effects -- 11. Coffee Quality -- 12. Coffee Substitutes -- References -- 2 Water and Mineral Contents -- 1. Introduction -- 2. Water Content of Green Coffee -- 3. Water Content of Parchment Coffee -- 4. Water Content of Roasted Coffee -- 5. Water Content of Instant Coffee -- 6. Water Content of Coffee Extracts -- 7. Mineral Content of Green and Roasted Coffee -- 8. Mineral Content of Instant Coffee -- 9. Trace Elements in Coffees -- References -- 3 Carbohydrates -- 1. Carbohydrates of Green Coffee -- 2. Carbohydrates of Roasted Coffee -- 3. Carbohydrates of Coffee Brews, Extracts and Instant Coffee -- 4. Some Physical Properties of Coffee Carbohydrates -- 5. Determination of Carbohydrates -- References -- 4 Nitrogenous Components -- 1. Introduction -- 2. Alkaloids (Caffeine) -- 3. Trigonelline -- 4. Nicotinic Acid -- 5. Proteins and Free Amino Acids -- References -- 5 Chlorogenic Acids -- 1. Introduction and Brief History -- 2. Chlorogenic Acids Nomenclature -- 3. Chemical Synthesis -- 4. Physical Properties -- 5. Origin and Function -- 6. Chlorogenic Acids Extraction and Analysis -- 7. Chlorogenic Acids Content in Green Coffee Beans -- 8. Chlorogenic Acids Content of Roasted Beans and Soluble Powders -- 9. Organoleptic Properties -- References -- 6 Lipids -- 1. Introduction -- 2. Coffee Oil -- 3. Coffee Wax -- References -- 7 Volatile Components -- 1. Preamble -- 2. Methodology -- 2.5. Summary -- 3. The Nature of the Volatile Components of Coffee -- References -- 8 Carboxylic Acids -- 1. The Role of Acids in Infusions -- 2. The Acid Content of Green Coffee -- 3. The Acid Content of Roasted Coffee -- 4. The Acid Content of Dried Coffee Extracts (Instant Coffees) -- 5. Determination of Acids -- 6. The Origins of Acids Found in Coffee Infusions -- References.
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  • 3
    Online Resource
    Online Resource
    Boston, MA : Springer US
    ISBN: 9781468415216
    Language: English
    Pages: Online-Ressource , online resource
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Introduction to instrumental methods of analysis -- 1.1 Precision and accuracy -- 1.2 Speed of analysis -- 1.3 Cost -- 1.4 Safety -- 1.5 Automation -- Recommended general texts -- 2 Liquid chromatography -- 2.1 Introduction -- 2.2 Theory of liquid chromatography -- 2.3 Modes of chromatography -- 2.4 Chromatographic techniques -- 2.5 Sample preparation -- References -- 3 Gas chromatography -- 3.1 Introduction -- 3.2 Principles -- 3.3 The chromatographic system -- 3.4 GLC columns -- 3.5 Principles of separation -- 3.6 Stationary phases -- 3.7 Gas—solid chromatography -- 3.8 Detectors -- 3.9 Sample preparation -- 3.10 Quantification -- References -- 4 Electrophoresis -- 4.1 Introduction -- 4.2 Effect of pH on charge -- 4.3 Techniques of electrophoresis -- 4.4 Isotachophoresis -- References -- 5 Introduction to spectroscopy -- 5.1 Spectroscopy -- 5.2 The electromagnetic spectrum -- 5.3 Molecular energy states -- 5.4 Molecular transitions -- 5.5 Quantitative analysis -- 5.6 Determination of a spectrum -- Further reading -- 6 UV—visible spectrophotometry -- 6.1 Introduction -- 6.2 Electronic energy levels -- 6.3 Electronic transitions -- 6.4 Qualitative analysis -- 6.5 Quantitative analysis -- 6.6 Calibration of spectrophotometers -- 6.7 Sample presentation -- 6.8 Difference spectrophotometry -- 6.9 Spectrophotometric titrations -- 6.10 Derivative spectrophotometry -- 6.11 Dual-wavelength spectrophotometry -- 6.12 Spectrophotometers and colorimeters -- 6.13 Turbidimetry and nephelometry -- 6.14 Colour and gloss of solid samples -- References -- 7 Fluorescence and phosphorescence spectrophotometry -- 7.1 Introduction -- 7.2 Fluorophores -- 7.3 Excitation and emission spectra -- 7.4 Quantitative measurements -- 7.5 Factors affecting fluorescence spectra -- 7.6 Instruments for fluorescence studies -- 7.7 Applications of fluorescence spectrophotometry -- References -- 8 Infrared spectroscopy -- 8.1 Introduction -- 8.2 Molecular vibrations -- 8.3 Qualitative analysis -- 8.4 Quantitative analysis -- 8.5 Instrumentation -- 8.7 Attenuated total reflectance -- 8.8 Near-infrared reflectance analysis -- References -- 9 Nuclear magnetic resonance spectroscopy -- 9.1 Introduction -- 9.2 Principles -- 9.3 Pulse NMR spectrometer -- 9.4 Chemical shifts -- 9.5 Spin—spin coupling -- 9.6 Integration -- 9.7 Further techniques for elucidation of NMR spectra -- 9.8 Wide-line NMR -- 9.9 In-vivo NMR -- References -- 10 Electron spin resonance -- 10.1 Principles -- 10.2 ESR spectra -- 10.3 ESR spectrometer -- 10.4 Sample preparation -- 10.5 Spin labelling -- 10.6 Quantitative analysis -- References -- 11 Flame techniques -- 11.1 Introduction -- 11.2 Flame emission spectrometry (FES) -- 11.3 Atomic absorption spectrometry (AAS) -- 11.4 Applications -- References -- 12 Mass spectrometry -- 12.1 Introduction -- 12.2 Mass spectrometer -- 12.3 Analysis of mixtures -- 12.4 Determination of molecular structures -- References -- 13 Electrochemical techniques -- 13.1 Introduction -- 13.2 Conductivity of solutions -- 13.3 Voltammetry -- 13.4 Potentiometric measurements -- References.
    Abstract: Instrumental techniques of analysis have now moved from the confines of the chemistry laboratory to form an indispensable part of the analytical armoury of many workers involved in the biological sciences. It is now quite out of the question to considcr a laboratory dealing with the analysis of biological materials that is not equipped with an extensive range of instrumentation. Recent years have also seen a dramatic improvement in the ease with which such instruments can be used, and the quality and quantity of the analytical data that they can produce. This is due in no sm all part to the ubiquitous use of microprocessors and computers for instrumental control. However, under these circumstances there is areal danger of the analyst adopting a 'black box' mentality and not treating the analytical data produced in accordance with the limitations that may be inherent in the method used. Such a problem can only be overcome if the operator is fully aware of both the theoretical and instrumental constraints relevant to the technique in question. As the complexity and sheer volume of material in undergraduate courses increases, there is a tendency to reduce the amount of fundamental material that is taught prior to embarking on the more applied aspects. This is nowhere more apparent than in the teaching of instrumental techniques of analysis.
    Description / Table of Contents: 1 Introduction to instrumental methods of analysis1.1 Precision and accuracy -- 1.2 Speed of analysis -- 1.3 Cost -- 1.4 Safety -- 1.5 Automation -- Recommended general texts -- 2 Liquid chromatography -- 2.1 Introduction -- 2.2 Theory of liquid chromatography -- 2.3 Modes of chromatography -- 2.4 Chromatographic techniques -- 2.5 Sample preparation -- References -- 3 Gas chromatography -- 3.1 Introduction -- 3.2 Principles -- 3.3 The chromatographic system -- 3.4 GLC columns -- 3.5 Principles of separation -- 3.6 Stationary phases -- 3.7 Gas-solid chromatography -- 3.8 Detectors -- 3.9 Sample preparation -- 3.10 Quantification -- References -- 4 Electrophoresis -- 4.1 Introduction -- 4.2 Effect of pH on charge -- 4.3 Techniques of electrophoresis -- 4.4 Isotachophoresis -- References -- 5 Introduction to spectroscopy -- 5.1 Spectroscopy -- 5.2 The electromagnetic spectrum -- 5.3 Molecular energy states -- 5.4 Molecular transitions -- 5.5 Quantitative analysis -- 5.6 Determination of a spectrum -- Further reading -- 6 UV-visible spectrophotometry -- 6.1 Introduction -- 6.2 Electronic energy levels -- 6.3 Electronic transitions -- 6.4 Qualitative analysis -- 6.5 Quantitative analysis -- 6.6 Calibration of spectrophotometers -- 6.7 Sample presentation -- 6.8 Difference spectrophotometry -- 6.9 Spectrophotometric titrations -- 6.10 Derivative spectrophotometry -- 6.11 Dual-wavelength spectrophotometry -- 6.12 Spectrophotometers and colorimeters -- 6.13 Turbidimetry and nephelometry -- 6.14 Colour and gloss of solid samples -- References -- 7 Fluorescence and phosphorescence spectrophotometry -- 7.1 Introduction -- 7.2 Fluorophores -- 7.3 Excitation and emission spectra -- 7.4 Quantitative measurements -- 7.5 Factors affecting fluorescence spectra -- 7.6 Instruments for fluorescence studies -- 7.7 Applications of fluorescence spectrophotometry -- References -- 8 Infrared spectroscopy -- 8.1 Introduction -- 8.2 Molecular vibrations -- 8.3 Qualitative analysis -- 8.4 Quantitative analysis -- 8.5 Instrumentation -- 8.7 Attenuated total reflectance -- 8.8 Near-infrared reflectance analysis -- References -- 9 Nuclear magnetic resonance spectroscopy -- 9.1 Introduction -- 9.2 Principles -- 9.3 Pulse NMR spectrometer -- 9.4 Chemical shifts -- 9.5 Spin-spin coupling -- 9.6 Integration -- 9.7 Further techniques for elucidation of NMR spectra -- 9.8 Wide-line NMR -- 9.9 In-vivo NMR -- References -- 10 Electron spin resonance -- 10.1 Principles -- 10.2 ESR spectra -- 10.3 ESR spectrometer -- 10.4 Sample preparation -- 10.5 Spin labelling -- 10.6 Quantitative analysis -- References -- 11 Flame techniques -- 11.1 Introduction -- 11.2 Flame emission spectrometry (FES) -- 11.3 Atomic absorption spectrometry (AAS) -- 11.4 Applications -- References -- 12 Mass spectrometry -- 12.1 Introduction -- 12.2 Mass spectrometer -- 12.3 Analysis of mixtures -- 12.4 Determination of molecular structures -- References -- 13 Electrochemical techniques -- 13.1 Introduction -- 13.2 Conductivity of solutions -- 13.3 Voltammetry -- 13.4 Potentiometric measurements -- References.
    URL: Volltext  (lizenzpflichtig)
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