Since Stx2 may be captured in the placental and embryonic tissues, its availability (concentration) in blood necessary to cause the effects on other target organs described in non-pregnant rats treated with similar sStx2 doses is decreased [24].
This preference, as measured by substrate utilization rate, was found to primarily depend on relative substrate availability (concentration) [ 34].
As a whole, these results are consistent with the hypothesis that increased CYP19A expression and presumably increased translation and abundance of aromatase A serve to offset competitive aromatase inhibition by FAD and that the interplay between increased catalytic capacity and the availability (concentration) of inhibitor controls whether or not this compensation succeeds.
In order to study the influence of phosphate, sulfate, and ferrous ions on biofilm formation, a large range of availability concentrations are investigated for each ion in order to capture the complete picture on how the starved and rich availabilities of these ions affect biofilm formation and the biomass growth rate of P. aeruginosa.
Principal component analysis (PCA) identified soil nutrient availability, metal concentration and texture as the three main factors that explain most of the variability observed.
A 95-day experiment determined the availability, total concentration and speciation of Cd in charosphere soil and the total and available Cd in biochar.
Based on the ease and customizability of the synthesis of the nanoparticles and the flexibility of their application, these oxygen-sensing polymeric nanoparticles will find a natural home in a range of biological applications, benefiting studies of physiological as well as pathological processes in which oxygen availability and concentration play a critical role.
We classified compounds based on the availability of concentration data, emissions sources, and the primary route of exposure.
Clearly, for a correct interpretation of the observed toxicity, the translocation (or systemic availability, internal concentration) is a crucial parameter.
Thus, fish are living under large fluctuations of physical parameters, such as photoperiod, water temperature, nutrition availability, oxygen concentration, and salinity, among others [ 2].
Temperature, photoperiod, light availability, nutrient concentration, pH, water availability, trauma and parasite effects, among others, have been described as major determinants of sex in organisms subject to ESD (Freeman et al. 1980; Korpelainen 1990 , 1998 and references therein).
