Microbial Transformation of Esters of Chlorinated Carboxylic Acids
AUTOR(ES)
Paris, D. F.
RESUMO
Two groups of compounds were selected for microbial transformation studies. In the first group were carboxylic acid esters having a fixed aromatic moiety and an increasing length of the alkyl component. Ethyl esters of chlorine-substituted carboxylic acids were in the second group. Microorganisms from environmental waters and a pure culture of Pseudomonas putida U were used. The bacterial populations were monitored by plate counts, and disappearance of the parent compound was followed by gas-liquid chromatography as a function of time. The products of microbial hydrolysis were the respective carboxylic acids. Octanol-water partition coefficients (Kow) for the compounds were measured. These values spanned three orders of magnitude, whereas microbial transformation rate constants (kb) varied only 50-fold. The microbial rate constants of the carboxylic acid esters with a fixed aromatic moiety increased with an increasing length of alkyl substituents. The regression coefficient for the linear relationships between log kb and log Kow was high for group 1 compounds, indicating that these parameters correlated well. The regression coefficient for the linear relationships for group 2 compounds, however, was low, indicating that these parameters correlated poorly.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=239602Documentos Relacionados
- Microbial degradation of beta-chlorinated four-carbon aliphatic acids.
- Microbial degradation of chlorinated acetophenones.
- Appel Reaction of Carboxylic Acids with Tribromoisocyanuric Acid/Triphenylphosphine: a Mild and Acid-Free Preparation of Esters and Amides
- Microwave-assisted synthesis of indole-2-carboxylic acid esters in ionic liquid
- Enhancement of the Microbial Dehalogenation of a Model Chlorinated Compound