Aggregation Behavior of Tyloxapol, a Nonionic Surfactant Oligomer, in Aqueous Solution

Interactions between Quaternary Ammonium Surfactant Oligomers and Water-Soluble Modified Guars

“…Microviscosity. The values of the P3P excimer lifetime and of the microviscosity characterizing the 1 wt% HMHPG solution both decreased upon increasing temperature (see Table 2), as for other systems (8,38). Values at lower polymer concentrations were not investigated as the volume fraction of hydrophobic microdomains present in the solution is then very low.…”

Small Variations in the Composition and Properties of Triton X-100

“…Many references to the properties of TX100 solutions may be found in Refs. (1,2,(8)(9)(10). The static light scattering measurements of Brown et al provided weight-averaged molecular weight of the micelles (10).…”

“…[1] and [2], and tried to fit their data to a different model. Recently, Regev and Zana (10) have found that the choice of probe and quencher (11) is very important in the study of TX100, for reasons associated with the high "mciroviscosity" of the micelle core. Using pyrene as probe and tetradecylcyanopyridinium ion as quencher they obtained an aggregation number of 106 at 25…”

Fatty acid binding site of mitochondrial uncoupling protein UCP2 as probed by EPR spectroscopy of spin-labeled fatty acids

“…3 shows the EPR spectrum of 4-PSL-PA in CI2E 9 micelles in the absence of UCP2 which is typical of weakly immobilized nitroxides indicating a restricted motion in these micelles, thus, reflecting their viscous nature. Note, however, that the intemal viscosity of CtzE 9 micelles is lower than that of Triton micelles [25]. This EPR spectrum is quite distinct from that without UCP2 as the 2Azz values in various experiments were only about 30 G. However, a small inflection (a negative peak) separated from the corresponding shoulder in the low field by about 40 G is also apparent.…”