In Bt maize, concentrations of Cry toxins have been shown to decline as the growing season progresses, but seasonal changes in toxin concentration are variable among toxins and cultivars [ 51].
For each milligram increase in the maize aflatoxin concentration, there was a 0.5 pg/mg increase in the logarithm of the serum aflatoxin B1 lysine adduct concentration.
The Ni level in cassava varied from 5.32 to 47.3 mg/kg and in maize grain concentration ranged from 2.9 to 46.2 mg/kg.
In developing maize, oxygen concentration is maintained at the high level in the oil-storing embryo, corresponding to the steady-state levels of glycolytic intermediates and those of the TCA cycle, as well as free amino acids (Rolletschek et al. 2005).
Maize pollen concentrations are significantly positively correlated with the area of maize cultivated within 200 m of the sample location and negatively correlated with the distance to the nearest maize field and the thickness of vegetative buffers around the lake.
Close correspondence between δ13CTOC values and maize pollen concentrations in the Laguna Castilla sediment record indicates a close relationship between the isotopic values and the scale of prehistoric maize cultivation.
High resolution analyses of δ13CTOC values, maize pollen concentrations, and mineral influx were conducted on sediments deposited during a ∼220 year period of prehistoric maize agriculture in the watershed of Laguna Castilla, a small lake in the mid-elevations of the Cordillera Central, Dominican Republic.
Later, a subset of 11 Inka coprolites and 10 pre-Inka coprolites were analyzed for maize starch concentrations.
In maize, Cd concentrations in root-pressure xylem exudates from high Cd-accumulating lines were higher than those from low Cd-accumulating lines [ 30], and there was no relationship between shoot Cd concentration and transpiration rate [ 16].
Our previous findings showing higher Th2 and lower Th1 responses to M. tb purified protein derivative (PPD) in Malawian infants compared with UK infants [ 4, 14, 15], led us to examine zinc deficiency in Malawian infants based on the reports regarding a Th1 to Th2 cytokine shift in zinc deficiency and the effects of high concentrations of phytate in maize on zinc concentrations [ 6- 8].
