Since both of dispersants contain the carboxyl group, it is very easy to adsorb on the positive side of zirconia, and thus, it will make the particle negatively charged and reduce the IEP to the lower value.
The energy required for the deprotonation increases for the hydroxyl group and even more so for the carboxyl group. However, the deprotonation at the H2 and H3 sites is almost as likely to occur, the difference in energy being very small.
(9.) Santos, AM, McKenna, TF, Guillot, J, "Emulsion Copolymerization of Styrene and n-Butyl Acrylate in Presence of Acrylic and Methacrylic Acids: Effect of pH on Kinetics and Carboxyl Group Distribution." J.
Found in turmeric--the main ingredient in curry--curcumin can undermine certain TLRs when a specific part of curcumin's chemical structure--known as a "beta unsaturated carboxyl group"--reacts with so-called "sulfhydryl groups" in TLRs.
The absorbance of hydroxyl group -OH at 3450 [cm.sup.-1] of coated phosphors (Figure 1b) is broader than that of uncoated phosphors (Figure la) because of the presence of carboxyl group of coated phosphors.