Journal ArticleDOI
Calcium phytate: Effect of ph and molar ratio on in vitro solubility
Frida Grynspan,Munir Cheryan +1 more
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TLDR
In this article, the authors studied the solubility of calcium and phytate phosphorus at all molar ratios of calcium (Ca) to phytic acid (PA) studied (0.512 and 0.67, respectively).Abstract:
Calcium and phytate phosphorus were highly soluble below pH 4 at all molar ratios of calcium (Ca) to phytic acid (PA) studied (0.512.67). As pH is increased above 4, there is a drop in solubility, the magnitude of which depends on the Ca:PA molar ratio. Above pH 6, the greatest calcium precipitation occurred at molar ratios between 4 and 6.5; both lower and higher Ca:PA molar ratios showed higher calcium solubility. In contrast, phytate phosphorus solubility decreased in proportion to the Ca:PA molar ratio, showing essentially complete precipitation above the Ca:PA ratio of 5. The pentacalcium phytate salt probably predominates when calcium is not limiting. Under calcium-limiting conditions, the complexes resolubilize as the pH is increased above 7.read more
Citations
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Consequences of calcium interactions with phytate and phytase for poultry and pigs
TL;DR: Examining Ca interactions with dietary phytate and phytase, particularly exogenous, microbial phytases, and their consequences for poultry and pigs finds that high dietary Ca levels may disrupt protein–phytate complex formation by interacting with both protein and protein even at acidic pH levels, thereby influencing the outcomes ofphytase amino acid digestibility assays.
Journal ArticleDOI
Effects of dietary fiber and phytic acid on mineral availability.
TL;DR: The studies summarized in this review show that the recommendation for increasing dietary fiber in Western communities would not be expected to have any adverse effect on mineral absorption if the authors increase not only the intake of fiber, but also the dietary intake of other food components such as protein and ascorbic, citric, and oxalic acids.
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Tricalcium phosphate is inappropriate as a universal selection factor for isolating and testing phosphate-solubilizing bacteria that enhance plant growth: a proposal for an alternative procedure
TL;DR: A practical approach is to use a combination of two or three metal-P compounds together or in tandem, according to the end use of these bacteria—Ca-P complex for alkaline soils, Fe-P and Al-P compound for acidic soils, and phytates for soils rich in organic P.
Journal ArticleDOI
The effect of minerals and mineral chelators on the formation of phytase-resistant and phytase-susceptible forms of phytic acid in solution and in a slurry of canola meal
TL;DR: In this article, the rank order of mineral potency as inhibitors of phytate hydrolysis was Zn 2+ ⪢Fe 2+ >Mn 2+) >Fe 3+ >Ca 2+>Mg 2+ at neutral pH.
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Influence of dietary calcium and phytase on phytate phosphorus hydrolysis in broiler chickens
TL;DR: Apparent ileal Ca absorption was improved and Ca at a level as low as 0.1% reduced (P < 0.05) when Ca, phytase, or both were added to the diet, but the improvement was less pronounced with a 6-phytase.
References
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Journal ArticleDOI
Phosphorus Assay in Column Chromatography
TL;DR: If the highest accuracy was not required, the following manipulations simplified and speeded multiple total phosphorus determinations on the eluates from column chromatographic separations.
Journal ArticleDOI
Phytic acid interactions in food systems
TL;DR: Development of methods for producing low-phytate food products must take into account the nature and extent of the interactions between phytic acid and other food components, such as pH-solubility profiles of the proteins and the cookability of the seeds.
Journal ArticleDOI
SOLUBILITY OF IRON, ALUMINUM, CALCIUM, AND MAGNESIUM INOSITOL PHOSPHATES AT DIFFERENT pH VALUES
R. H. Jackman,C. A. Black +1 more
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The interaction between phytic acid and divalent cations during the cooking of dried peas
D. E. C. Crean,D. R. Haisman +1 more
TL;DR: In this paper, the combination between phytate and the calcium and magnesium ions in peas cooked for various times in solutions of varying degrees of hardness has been studied, and it is concluded that the influence of phytates on texture is small.
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Calcein as an Indicator for the Determination of Total Calcium and Magnesium and Calcium Alone in the Same Aliquot of Milk
H.A. Ntailianas,R.McL. Whitney +1 more
TL;DR: In this article, a method was developed for calcium and magnesium determination in milk on the basis of the different behavior of these two cations towards the indicator calcein, which was performed by back titration with calcium chloride solution in the same aliquot of a diluted milk containing an excess of Ethylenediamine tetraacetate (EDTA).