In Nena's grain, a most pronounced increase was found in β-carotene, Mg and Fe contents under the application of the Zircon treatment, thus positively affecting the bioavailability of these mineral elements (Figure 2).
These results demonstrate that reduction leads to solubilization of barium sulfate, thereby favoring greater mobility and bioavailability of this element.
Imrie et al [ 17] suggested that the relationship may be an indirect one; the result of trace element deficiencies caused by decreased bioavailability of certain of these elements with increasing soil pH, total organic carbon and clay fraction.
Numerous authors have used in vitro systems to estimate the bioavailability of inorganic elements.
According to results of our investigation, chickpea genotypes with P phy < 2.5 mg g−1, such as C2, C3, C9, and C10 landraces, could be used for breeding program for further phytate decrease, i.e., increased bioavailability of mineral elements.
The developed procedure was applied to evaluate the bioavailability of both elements in four sediment certified reference materials, in which there are not certified values for bioavailable fractions, and also in estuarine sediment samples collected in several sites of Guanabara Bay, an impacted environment in Rio de Janeiro, Brazil.
Sulphide is not only toxic to various microbial populations, but also forms complexes with metals, which can decrease the bioavailability of trace elements essential for microbial activity [ 6, 8].
High pressure and low temperatures might influence the bioavailability of toxic elements, she says, and deep-sea species may be either less or more susceptible to plume toxicity than species in shallower waters.
Circumstantial evidence, however, strongly suggests that a deficiency in or requirement of these elements increases the bioavailability of dietary Cd and thereby susceptibility to its adverse effects.
The authors note that although these trace elements are important nutritional requirements for humans, and that H. utriformis may be considered a good source of these elements, it is known that absorption of the elements (bioavailability) from mushrooms is "low due to limited absorption from the small intestine".
