Nucleophilic substitution as a mechanism of XXXX sequestration in soil.

@entity1522 @entity1568 @entity10664 @entity17072 @entity3878 @entity12472 @entity1432 @entity3287 @entity505 @entity599 @entity9308
Formation of nonextractable residue was widely observed as a sink of @entity12472 ( @entity10664 ) in soil. However, the mechanisms by which @entity10664 binds to soil organic matter remain unclear. In this study, we demonstrated that neucleophilic substitution could serve an important pathway causing @entity10664 sequestration. The @entity505 bonded to the @entity3878 in @entity10664 molecule is partially positively charged due to the strong electronegativity of @entity3878 and is susceptible to the attack of nucleophiles such as @entity9308 . Since @entity17072 are relatively rare in natural soils, @entity1522 /peptides were hypothesized to act as the main nucleophiles in real environment. However, substantially @entity10664 transformation was only observed in the presence of those species containing @entity1432 functionality. Thus, we speculated that it was the @entity1432 group in @entity1522 /peptides acting as the nucleophile. @entity1568 in @entity1522 was in fact not an active nucleophile toward @entity10664 . In addition to the @entity599 -containing @entity1522 , other @entity1432 compounds, and @entity3287 were also proved to be reactive to @entity10664 . Thus, the sequestration potential of @entity10664 probably correlates to the availability of @entity1432 compounds in soil.
