The mianly principle of Preparation of ODEX is that hydroxyl (OH) groups of dextran can be oxidized to form active aldehyde groups
. The determination of ODEX by Ultraviolet spectrophotometry suggested that ODEX has typical UV absorption characteristics (Fig.
A possible reaction mechanism involves the reaction of the characteristic aldehyde groups
of some sugar molecules with the free amino groups of gelatin molecules, resulting in the formation of an aminoglycoside bond, which can further react with another free amino group of gelatin molecules and give birth to a cross-linked structure, as shown in Fig.
The UIF resins also contained hydroxyl groups and aldehyde groups
; the content of aldehyde groups
in the resin increased as the amount of isobutyraldehyde increased.
The tip of the pentagon is occupied by an aldehyde group
(a carbon atom bound to one hydrogen atom and--through a double bond--an oxygen atom), which acts as an asymmetric rotor blade.
The aldehyde group
is inherently reactive toward a host of ingredients commonly used in soap and cosmetics formulations.
However, M2 has more swelling rate as compared to M1, because of aldehyde group
[USPRwire, Sun Nov 11 2018] Glyoxal is an organic compound that belongs to the aldehyde group
and has the chemical formula OCHHO (CAS Number: 107-22-2).
In this article, we present the synthesis of crosslinked polysulfone with double bonds by PTC method in solid-liquid system using polysulfone grafted with phosphonate and polysulfone grafted with aldehyde group
previously synthesized (30).
In H-NMR spectra of polythioamides, the ratios of the peaks area agree with the suggested assignment and no peak attributed to aldehyde group
is observed (Fig: 4).
The 1H-NMR spectrum of dialdehyde showed a peak of aldehydegroup at and 9.1 due to a proton attached to the aldehyde group
. In the 1H-NMR spectrum of Schiff base polymer, the ratios of peaks area are in agreement with the reported assignments  no peak attributed to aldehyde group
Oxidation of the aldehyde group
on C-1 of b-d glucose to a carboxylic group results in the production of glucono lactone (C6H10O6) which is hydrolyzed to gluconic acid .
For the determination of monomer concentration and for the calculation of rate constants, the intensities of signals of the aldehyde group
at 9.4 ppm, of the double bond between 6 and 7 ppm and of the amino group at 7.7 ppm were used.