In addition, a comprehensive picture of the degradation of industrial PLA was obtained by subjecting different PLA materials to hydrolytic degradation at various temperatures and pH's for up to 182 days.
There are no Ph's, only F's in Spanish.
At these pH's higher than the pzc of the TiO2, the three studied diacids show a very low degree of adsorption onto the semiconductor surface and no evidence of cis trans isomerisation for both maleic and fumaric acids is detected.
At lower pH's, the monomer [HVO4]2− and dimer [V2O7]− are formed, with the monomer predominant at vanadium concentration of less than ca. 10−2M (pV > 2; pV is equal to minus the logarithm of the total vanadium concentration/M).
Unfortunately, due to broadening at lower pH's, we were unable to obtain spectra under the acidic conditions necessary (pH 3.5) to observe the fully protonated state.
15a We attempted to record INEPT spectra at all pH's to determine if any of the protein was highly mobile, but no INEPT signal was observed (data not shown).
In most cases, soil samples range in pH from 5 to 7.3, with pH's between 6.6 and 7.3 being neutral, pHs below 6.6 being acidic and pH's above 7.3 being alkaline.
At high pH's NADH was stable outside the cell.
When a pig is stressed, it can enter a hypermetabolic state that generates excessively high temperatures and low pH's.
The dissolution tests of the preparations were performed in the media with different pH's.
On the other hand, forsterite dissolution rates can be diffusion controlled for typical advection fluxes, grain sizes, temperatures, and pH's.
