Branch of food chemistry
Food physical chemistry is considered to be a branch of Food chemistry [ 1] [ 2] concerned with the study of both physical and chemical interactions in foods in terms of physical and chemical principles applied to food systems, as well as the applications of physical/chemical techniques and instrumentation for the study of foods.[ 3] [ 4] [ 5] [ 6] This field encompasses the "physiochemical principles of the reactions and conversions that occur during the manufacture, handling, and storage of foods." [ 7]
Food physical chemistry concepts are often drawn from rheology , theories of transport phenomena, physical and chemical thermodynamics , chemical bonds and interaction forces, quantum mechanics and reaction kinetics, biopolymer science, colloidal interactions, nucleation, glass transitions, and freezing,[ 8] [ 9] disordered/noncrystalline solids.
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Techniques utilized range widely from dynamic rheometry, optical microscopy , electron microscopy , AFM , light scattering , X-ray diffraction /neutron diffraction ,[ 10] to MRI , spectroscopy (NMR ,[ 11] FT-NIR /IR , NIRS, ESR and EPR ,[ 12] [ 13] CD/VCD ,[ 14] Fluorescence , FCS ,[ 15] [ 16] [ 17] [ 18] [ 19] HPLC , GC-MS ,[ 20] [ 21] and other related analytical techniques.
Understanding food processes and the properties of foods requires a knowledge of physical chemistry and how it applies to specific foods and food processes. Food physical chemistry is essential for improving the quality of foods, their stability, and food product development . Because food science is a multi-disciplinary field, food physical chemistry is being developed through interactions with other areas of food chemistry and food science, such as food analytical chemistry , food process engineering /food processing , food and bioprocess technology , food extrusion , food quality control, food packaging , food biotechnology , and food microbiology .
Topics in Food physical chemistry [ edit ] The following are examples of topics in food physical chemistry that are of interest to both the food industry and food science:
Starch, 800x magnified, under polarized light Macaroni is an extruded hollow pasta.Water in foods
Local structure in liquid water
Micro-crystallization in ice cream emulsions
Dispersion and surface-adsorption processes in foods
Water and protein activities
Food hydration and shelf-life
Hydrophobic interactions in foods
Hydrogen bonding and ionic interactions in foods
Disulfide bond breaking and formation in foods
Food dispersions
Structure-functionality in foods
Food micro- and nano- structure
Food gels and gelling mechanisms
Cross-linking in foods
Starch gelatinization and retrogradation
Physico-chemical modification of carbohydrates
Physico-chemical interactions in food formulations
Freezing effects on foods and freeze concentration of liquids
Glass transition in wheat gluten and wheat doughs
Drying of foods and crops
Rheology of wheat doughs, cheese and meat
Rheology of extrusion processes
Food enzyme kinetics
Immobilized enzymes and cells
Microencapsulation
Carbohydrates structure and interactions with water and proteins
Maillard browning reactions
Lipids structures and interactions with water and food proteins
Food proteins structure, hydration and functionality in foods
Food protein denaturation
Food enzymes and reaction mechanisms
Vitamin interactions and preservation during food processing
Interaction of salts and minerals with food proteins and water
Color determinations and food grade coloring
Flavors and sensorial perception of foods
Properties of food additives Visualisation of the human interactome network topology with the blue lines between proteins (represented as points) showing protein-protein interactions Techniques gallery: High-Field NMR, CARS (Raman spectroscopy), Fluorescence confocal microscopy and Hyperspectral imaging [ edit ]
Stoks and anti-Stokes shifts
CARS Raman Spectroscopy
Hyperspectral Imaging Cube
Multi-spectral Imaging principle
Confocal Imaging Principle
Fluorescence microscope
Yeast membrane protein imaging
Dividing cell fluorescence
HeLa cancer cells
FISH fluorescence technique
Red blood cell pathology
Carboxyzome
Example of a GC-MS instrument An FTIR interferogram. The central peak is at zero retardation, ZPD) where the maximum amount of light passes through the interferometer to the detector.
^ John M. de Man.1999. Principles of Food Chemistry (Food Science Text Series), Springer Science, Third Edition
^ John M. de Man. 2009. Food process engineering and technology, Academic Press, Elsevier: London and New York, 1st edn.
^ Pieter Walstra. 2003. Physical Chemistry Of Foods . Marcel Dekker, Inc.: New York, 873 pages
^ Physical Chemistry Of Food Processes: Fundamental Aspects .1992. van Nostrand-Reinhold vol.1., 1st Edition,
^ Henry G. Schwartzberg, Richard W. Hartel. 1992. Physical Chemistry of Foods . IFT Basic Symposium Series, Marcel Dekker, Inc.:New York, 793 pages
^ Physical Chemistry of Food Processes, Advanced Techniques, Structures and Applications . 1994. van Nostrand-Reinhold vols.1-2., 1st Edition, 998 pages; 3rd edn. Minuteman Press, 2010; vols. 2-3, fifth edition (in press )
^ Pieter Walstra. 2003. Physical Chemistry Of Foods . Marcel Dekker, Inc.: New York, 873 pages
^ Pieter Walstra. 2003. Physical Chemistry Of Foods . Marcel Dekker, Inc.: New York, 873 pages
^ Physical Chemistry Of Food Processes: Fundamental Aspects .1992.van Nostrand-Reinhold vol.1., 1st Edition,
^ Physical Chemistry of Food Processes, Advanced Techniques, Structures and Applications .1994. van Nostrand-Reinhold vols.1-2., 1st Edition, 998 pages; 3rd edn. Minuteman Press, 2010; vols. 2-3, fifth edition (in press )
^ https://www.nobelprize.org/nobel_prizes/physics/laureates/1952/ First Nobel Prize for NMR in Physics, in 1952
^ http://www.ismrm.org/12/aboutzavoisky.htm ESR discovery in 1941
^ Abragam, A.; Bleaney, B. Electron paramagnetic resonance of transition ions . Clarendon Press:Oxford, 1970, 1,116 pages.
^ Physical Chemistry of Food Processes, Advanced Techniques, Structures and Applications .1994. van Nostrand-Reinhold vols.1-2., 1st Edition, 998 pages; 3rd edn. Minuteman Press, 2010; vols. 2-3, fifth edition (in press )
^ Magde D.; Elson E. L.; Webb W. W. (1972). "Thermodynamic fluctuations in a reacting system: Measurement by fluorescence correlation spectroscopy, (1972)". Phys Rev Lett . 29 (11): 705–708. doi :10.1103/physrevlett.29.705 .
^ Ehrenberg, M., Rigler, R. (1974). "Rotational brownian motion and fluorescence intensity fluctuations". Chem Phys . 4 (3): 390–401. Bibcode :1974CP......4..390E . doi :10.1016/0301-0104(74)85005-6 . ISSN 0301-0104 . ((cite journal ))
: CS1 maint: multiple names: authors list (link )
^ Elson E. L., Magde D. (1974). "Fluorescence correlation spectroscopy I. Conceptual basis and theory, (1974)". Biopolymers . 13 : 1–27. doi :10.1002/bip.1974.360130102 . S2CID 97201376 .
^ Magde D.; Elson E. L.; Webb W. W. (1974). "Fluorescence correlation spectroscopy II. An experimental realization, (1974)". Biopolymers . 13 (1): 29–61. doi :10.1002/bip.1974.360130103 . PMID 4818131 . S2CID 2832069 .
^ Thompson N L 1991 Topics in Fluorescence Spectroscopy Techniques vol 1, ed J R Lakowicz (New York: Plenum) pp 337–78
^ Gohlke, R. S. (1959). "Time-of-Flight Mass Spectrometry and Gas-Liquid Partition Chromatography". Analytical Chemistry . 31 (4): 535–541. doi :10.1021/ac50164a024 .
^ Gohlke, R; McLafferty, Fred W. (1993). "Early gas chromatography/mass spectrometry". Journal of the American Society for Mass Spectrometry . 4 (5): 367–71. doi :10.1016/1044-0305(93)85001-E . PMID 24234933 .