In this reaction, a dehydroxylation
of the structure must occur to allow carbonate formation.
The relief can be achieved by the insertion of unmodified TRPA1 proteins into the plasma membrane through rapid vesicle fusion, or by dehydroxylation
through an unidentified enzymatic process.
The second mass loss in the temperature range of 300[degrees]C-500 [degrees]C corresponds to dehydroxylation
of structural aluminol groups (Al-OH) .
of kaolin to metakaolin is an endothermic process due to a large amount of energy required to remove the chemically bonded hydroxyl ions.
The DSC curves show endothermic and exothermic reactions during calcination, such as desorption of surface water (H2O), dehydroxy lation (structural OH-groups) and the transformation to mullite and cristobalite, with resultant temperature effects of dehydroxylation
and polymorphic transformation strongly dependent on kaolinite structural order (Ece et al.
34) The third region of above 500[degrees]C is attributed to the dehydroxylation
(release of OH from the structure).
2011); Implications of the thermal properties and kinetic parameters of dehydroxylation
of mica minerals for fault weakening, frictional heating, and earthquake energetic.
Mostly, ring fission of, for example, flavonoids , demethylation, dehydroxylation
, decarboxylation, and deglycosylation and reduction reactions have been reported and have been reviewed previously [136,137].
Perhaps, this is the conversion period of diaspore to corundum in which dehydroxylation
takes place .
The weight lost upto 160 oC can be attributed to the removal of surface adsorbed water while the weight lost between 150 oC to 500 oC is attributed to the interlayer water and due to the dehydroxylation
of cerium species.
2003) found that dehydroxylation
of HA leads to TTCP and TCP phases.
The second endothermic peak which corresponds to dehydroxylation
of kaolinite is associated with a well-dened endothermic peak in DTA curve at 500 - 550C (McConville and Lee, 2005; McConville et al.