It Probed into the effect of concentration explosive limits caused by the nature of explosive gases, the damping effect of polybasic Gas caused by CO, as well as the conjunct oxidative and inductive effect .

The inductive effect of comercial environment in modern urban;

For acetic acid,propionic acid and butyric acid with reducing of the inductive effect and increasing of the cavity effect,the apparent adsorption rated constant(k),the interaction energy between the absorbent and the absorbate and the affinity of the absorbate to the absor.

The difference between chemical shifts of a carbon and the value when one H of the carbon is substituted by methyl is denominated as Δδ,which represents the ability of inductive effect of the methyl.

The induced effect of alkyl is supposed to penetrate organic chemistry, which pushing electron of alkyl is used to explain in most text books and reference books.

The direction question of cancellation reaction could be better explained with the induced effect index of away substituents (Cl, Br, I) and Fandehua redius.

This paper proposed the quantitative relationship between electron affinity and induced effect.

On the basis of reaction examples,through analyzing electronic effect of halogen leaving groups in reacting substance and intermediate complex,combining reaction mechanisms,adopting basic organic theories,the corresponding relations between electro negativity,electronic effect,especially induction effect of leaving groups and reacting rate were explained qualitatively.

Objective: To study the induction effects and mechanism of dexamethasone (DEX) on cytochrome P450 (CYP450) enzymes.