Figure 12 gives the effect of zwitterion
, nonionic and anionic surfactants on modified clays' contact angles and Figure 13 shows the cationic surfactants effect.
The purpose of this study is to derive an approximate analytical solution for the prediction of the facilitation factor and permeation rate through liquid membranes for the facilitated transport of C[O.sub.2] where the reaction rate for C[O.sub.2] is expressed by the zwitterions
reaction mechanism of Danckwerts (1979) and over a range from the moderate chemical reaction rate region to the chemical equilibrium region.
The initial attack of ozone occurs in both stressed and unstressed rubber to give a molozonide, which is unstable and dissociates to give a Zwitterion
(1) and a carbonyl compound (2).
A possible explanation is that the highly polar zwitterions
bonded to the glass-fiber surface, causing the evanescent wave sensor to lose sensitivity.
Hydroperoxide 21 is also a known product of the singlet oxygen-mediated oxidation of tryptophan, and it gets converted via its hydroperoxide isomer 22, zwitterion
23, and dioxetane 24 to N-formylkynurenine 25 [34, 55].
where L is dipeptide monoanion; HL is total zwitterion
and neutral forms of dipeptide.
Only at 770 fs, when the avoided crossing occurs, a zwitterion
is clearly formed.
Bean et al., "Evaluation of in situ curable biodegradable polyurethanes containing zwitterion
components," Journal of Materials Science: Materials in Medicine, vol.
First step is a 1,3 dipolar cycloaddition of ozone to the olefin leading to the malozonide (1) (Criegee intermediate), which is very unstable and decomposes to give a zwitterion
(2) and a carbonyl compound (3) In the presence of reactive solvent, such as water or alcohol, the zwitterion
interact with the solvent to give hydroperoxides (4) in high yield, since the concentration of the solvent far exceeds that of any other substances with which the zwitterion
To describe this duplicity, the scientists coined the term "zwitterhormone," based on "zwitterion
," a molecule containing both positively and negatively charged groups.
The reaction of the antiozonant with the ozonized rubber or zwitterion
to form a self-healing film on the rubber surface (ref.
Actually, the presence of the zwitterion
and protonated form of cysteine in 0.05 M HCl contributes to the adsorption of the inhibitor on cathodic active sites on the brass surface .