Combined with anionic polymer at pH greater than pKa of polymer; simultaneous addition; improved paper filler and short fiber retentionUS20040171719 Feb 27, 2004 Sep 2, 2004 Neivandt David J. Starch compositions and methods of making starch compositions...
The hydrogels became negatively charged at a pH close to, or higher than, the pKa of the SMA units (which is equal to ca. 4.8). The proteins, in turn, were positively charged at pH values smaller than their pI values. Combinations of attractive properties of gel and protein under the ...
The lower the pKa, the stronger the acid and the greater its ability to donate protons. The pH depends on the concentration of the solution. This is important because it means a weak acid could actually have a lower pH than a diluted strong acid. For example, concentrated vinegar (acetic ...
which manifests itself in the dependence of the calculated pKa’s on the initial configuration. As a result, the calculated pKa’s of Asp164 from the simulations initiated from the earlier crystal structure are 0.8/1.6 units higher than the pKafrom the simulation based on the recent crystal st...
which is water that didn't have a chance to pick up any minerals or gases, corresponds to a pH of 7 which is the neutral pH. An acidic solution will have a pH below 7 and an alkaline solution will have a pH greater than 7. Once distilled water stands in air it will pick up CO2...
highlighted that with the increasing pH of the suspending solution, the absolute value of the zeta potential rises. Moreover, the zeta potential value greater than ±20 mV indicates the dispersion stability of the system21. This suggests that tested (bio)colloid is stable at pH higher than ...
For these types of applications, fluorescein conjugates are less than optimal because they have little sensitivity in the pH range below pH 5.5. The response range can be extended using conjugates of our Oregon Green 488 dye, which has a much lower pKa than fluorescein (4.7 compared with ...
Suppose that the concentration of H+ in solution 1 is 10,000 times greater than solution 2. What can you conclude about the difference in the pH of these two solutions? Suppose that the concentration of H+ in Solution #1 is 10,000 times greater than in Solution #2. What can you conclu...
Below pKa, the positive charges of the protonated amine groups maintained the solubility of the polymers in aqueous solution, whereas when pH was greater than pKa, the hydrophobic butyl groups on neutralized PDBAEMA segments rapidly induced the aggregation and precipitation of the polymers. Compared ...
with a pH greater than 7 are basic oralkaline.A pH levelof 7.0 at 25°C is defined as "neutral" because the concentration of H3O+equals the concentration of OH−in pure water. Extremely strong acids might havea negative pH, while extremely strong bases might have a pH greater than 14...