Methods 24 health males of Wistar rats were randomly divided into three groups (group A: normal control group, group B: COPD model group, group C: group pretreated with prednisone), of which each got 8 rats for this study project.
Results By the end of 4th,8th,12th and 16th week,the content of COX-2 mRNA in liver tissue of model rats were 1.29,1.70,1.92 and 3.38 times the same as normal rats(P<0.01,except for 4th week),and the expression of COX-2 protein increased also.
In this paper, we prove the degenerations of Schubert varieties in a minusculeG/P, as well as the class of Kempf varieties in the flag varietySL(n)/B, to (normal) toric varieties.
As a consequence, we obtain that determinantal varietes degenerate to (normal) toric varieties.
If the additive group of complex numbers acts algebraically on a normal affine variety, then the associated ring of invariants need not be finitely generated, but is an ideal transform of some normal affine algebra (Theorem 1).
We investigate such normal affine algebras in the case of a locally trivial action on a factorial variety.
On the other hand, there is a locally trivialGa-action on a normal affine variety with nonfinitely generated ring of invariants (Theorem 2).