The latter process can only be locally important in the tower system as algal concentrations in the hypolimnion were maintained at approximately 1.5 mg C L-1, which is above the "incipient limiting concentration" where the feeding rate of Daphnia becomes independent of the food concentration [ 26].
For the same TBAB concentration, the incipient pressure and temperature required for nucleation and re-nucleation of semiclathrate hydrates increase while the time required for re-nucleation decreases.
Additionally, for the same TBAB concentration, the incipient pressure and temperature required for nucleation and re-nucleation of semiclathrate hydrates increase, while the time required for re-nucleation decreases.
Re-nucleation (memory) effect is examined for semiclathrate hydrates of carbon dioxide, and the effect of TBAB concentration on incipient conditions (pressure, temperature, and time) required for re-nucleation is discussed.
It is shown that the experimental evidence supports the theory that endurance limits at very high cycle fatigue are related to thresholds for crack propagation of incipient cracks from stress-concentration sites.
It is observed that the effect of the concentration of TBAB on incipient pressure, temperature, and time required for re-nucleation of semiclathrate hydrates has not yet been examined and thus requires investigation.
Citric acid, oxalic acid, and NTA do not show clear evidence of any U removal, although data at 96 h for NTA show lower concentrations that may indicate incipient partial U removal.
These in turn cause the incipient cracks to initiate at stress concentrations which either grow or arrest depending on the magnitude and gradient of the internal stresses.
As noted recently (Woods et al. 2009a), incipient although statistically nonsignificant changes in urinary porphyrin concentrations were seen among children with urinary Hg concentrations derived from prolonged dental amalgam Hg exposure on the order of 3.2 μg/g creatinine.
Methyl radicals can increase the concentration of propargyls, which could enhance incipient benzene ring formation through the propargyl recombination reaction and subsequent PAH growth.
