1988
DOI: 10.1111/j.1365-2621.1988.tb09278.x
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Observation and Analysis of Crystalline Phases in Processed Cheese

Abstract: Crystals in four kinds of processed cheese were investigated and found to depend upon the salt used in the melting process. Transmission and scanning electron microscopy, in situ X-ray diffraction, infrared spectroscopy and EDX analysis were used to reveal the presence of crystalline monoclinic calcium pyrophosphate dihydrate in addition to calcium phosphate.

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Cited by 13 publications
(3 citation statements)
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“…Another interesting observation is the mineral deposits within the cheese at Week 13 (Supplementary Figure 2), which were similar to those identified in previous studies as calcium phosphate via Scanning Electron Microscopy -Energy Dispersive X-ray Spectroscopy (SEM-EDX) analysis (Pommert et al 1988). The mineral deposit was randomly spotted within the microstructure of the cheese and thus no relationship could be drawn between the number of mineral deposits and the milk protein concentration.…”
Section: Microstructure Of Cheddar Cheese Throughout Ripeningsupporting
confidence: 86%
“…Another interesting observation is the mineral deposits within the cheese at Week 13 (Supplementary Figure 2), which were similar to those identified in previous studies as calcium phosphate via Scanning Electron Microscopy -Energy Dispersive X-ray Spectroscopy (SEM-EDX) analysis (Pommert et al 1988). The mineral deposit was randomly spotted within the microstructure of the cheese and thus no relationship could be drawn between the number of mineral deposits and the milk protein concentration.…”
Section: Microstructure Of Cheddar Cheese Throughout Ripeningsupporting
confidence: 86%
“…These range from tyrosine, calcium lactate, and lactose to various salts of calcium phosphate and calcium citrate (reviewed by Caric and others 1985; Guinee and others 2004). Concentrating on process cheese, researchers over the years have shown instances and even identified different types of crystals using microscopy, Fourier transform infrared spectroscopy, and x‐ray diffraction (Sommer 1930; Scharpf and Michnick 1967; Scharpf and Kichline 1968, 1969; Rayan and others 1980; Uhlmann and others 1983; Klostermeyer and others 1984; Caric and others 1985; Pommert and others 1988). The types of crystals identified in process cheese ranged from salts of calcium tartrate (Sommer 1930; Leather 1947) (although tartrate crystals are not commonly found anymore since tartrate‐based emulsifying salts are not typically used today), calcium citrate (Morris and others 1969; Scharpf and Kichline 1969), tertiary complexes of sodium and calcium citrates (Klostermeyer and others 1984), various salts of sodium and calcium phosphates (Scharpf and Kichline 1968; Pommert and others 1988), and, sometimes, calcium salts of free fatty acids (Bester and Venter 1986).…”
mentioning
confidence: 99%
“…X-ray microanalysis using a scanning electron microscope clearly showed the presence of the calcium-phosphate-rich zone. Although this method is not well developed in substrates such as cheese, the digital X-ray mapping of a fracture surface of Camembert cheese [3] and the identification of calcium phosphate crystals in processed cheeses [24] have previously been reported. A zone just under the rind, 75-250-μm thick, with individual crystal aggregates of calcium phosphate has already been shown [3] and was confirmed in this study.…”
Section: Zonesmentioning
confidence: 99%