Gene/Protein
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Enzyme
Compound
Pivot Concepts:
Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Target Concepts:
Gene/Protein
Disease
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Enzyme
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Query: EC:2.3.1.107 (
DAT
)
1,471
document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)
The montmorillonite samples from Heping, China had been studied by chemical analysis,
DAT
, TG, XRD and
MAS
NMR. The results showed that the hydroxyl in octahedra sheets begins dehydrating, when the thermal treatment temperature reaches 650 degrees C, but the layer structure remains, the corresponding Al(VI) was turned into Al(IV) in octahedra sheets. When the temperature reaches 900 degrees C, the layer structure of montmorillonite is destroyed, and the new mineral phase mu-cordierite is found. When the temperature reaches 1200 degrees C, the mu-cordierite phase loses stability, and decomposes into cristobalite phase and mullite phase, meanwhile, the recrystallization phenomena in thermal treatment products is obvious. There is a small quantity of Al(VI) signal in
MAS
NMR spectrum, this Al(VI) corresponds to the Al of mullite. When the temperature reaches 1350 degrees C, the cristobalite and mullite phases reduce slightly, and more Fe-cordierite phase appear. There is corresponding Fe-cordierite spectrum in XRD and
MAS
NMR.
...
PMID:The microstructural study of thermal treatment montmorillonite from Heping, China. 1616 46
