Chemical exchange saturation transfer (CEST) practically overcomes some of the concentration limitations of MRS: By exploiting a chemical property of certain metabolites, these can be detected with increased sensitivity to two orders of magnitude higher or more by a continuous process of re-saturation and exchange (to be discussed in the coming sections).
Numerous phenomena--decreased pH, acid accumulation, intracellular ATP concentration, nutrient limitation, interplay between carbon and electron flow pathways, and sporulation--have been hypothesized to contribute [ 15, 16].
These results showed a slightly different response for both pathogens against UVA irradiance and H2O2 concentration: photo-limitation for both types of bacteria; while only E. coli was limited by the H2O2 concentrations investigated in this work.
Since marine systems are characterized by high inorganic sulfur concentrations, the limitation of this element would be expected to be rare where WP3 is found.
As oxygen concentrations were low when life began, Klotz and Loewen [ 133] suggested that the first to evolve were rubredoxin peroxidases, which become saturated at low (micromolar) peroxide concentrations, a limitation not then a drawback.
Nasal mucosa congestion and nasal polyposis have been shown to have an impact on the measured nasal NO concentrations.One limitation with the present study is that no nasal endoscopy was performed before measuring nasal NO, and we can therefore not exclude presence of these known factors.
Considerable noise exists in the relationship between the IC50 calculated from qHTS data and the KD calculated from the enthalpograms (Figure 7), presumably because the high protein (8 µM) and probe (15 µM) concentrations, and limitations to compound solubility, produce incomplete curves in the qHTS experiment.
In the single-stage two-membrane ATR reactor, the large gradients of temperature and hydrogen concentration indicate the limitation of mass transfer and heat transfer.
The optimal objectives of exhaust hood optimization are the limitation concentration of emission at the exit and the minimum deposition on the exhaust hood walls of cut tobacco.
The concentration and resolution limitation of fluorescence imaging for NO is about nmol/L and nm, which is suitable for the study of NO imaging in cell and sub-cell.
