反应 #350557

ord-eb280669c71847b59bf6ce4570e27668

反应方程式

O=[N+]([O-])c1ccccc1O[C@@H]1O[C@H](CO)[C@H](O)[C@H](O)[C@H]1O
ONPG
OC[C@H]1O[C@@H](O[C@H]2[C@H](O)[C@@H](O)C(O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@H]1O
lactose
O=[N+]([O-])c1ccccc1O[C@@H]1O[C@H](CO)[C@H](O)[C@H](O)[C@H]1O
ONPG
→
c1ccc2[nH]ccc2c1
indole

反应物

O=[N+]([O-])c1ccccc1O[C@@H]1O[C@H](CO)[C@H](O)[C@H](O)[C@H]1O
ONPG
OC[C@H]1O[C@@H](O[C@H]2[C@H](O)[C@@H](O)C(O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@H]1O
lactose
O=[N+]([O-])c1ccccc1O[C@@H]1O[C@H](CO)[C@H](O)[C@H](O)[C@H]1O
ONPG

试剂

无

反应条件

详细条件
See reaction.notes.procedure_details.

后处理

  1. 1
    其他At 44.5° C

实验过程

Principle of Step 1: ONPG substituting for lactose is metabolized with β-galactosidase. At 44.5° C. E. coli grow and utilize ONPG and produce indole. β-galactoside turns the medium yellow. In the yellow colored medium, both fecal coliforms and E. coli are present. In samples which do not have a yellow color, there are no fecal coliforms and E. coli.

来源

DOI: 10.6084/m9.figshare.5104873.v1专利: US05643743uspto-grants-1997_07