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Inductive and resonance effects of substituents adjust the microalgal biodegradation of toxical phenolic compounds

Paper ID Volume ID Publish Year Pages File Format Full-Text
24916 43545 2008 8 PDF Available
Title
Inductive and resonance effects of substituents adjust the microalgal biodegradation of toxical phenolic compounds
Abstract

The type and the position of the substituent in the phenolic ring, the bond dissociation energy and the exogenously supplied carbon source as well as the inductive and resonance effect phenomena of the substituents adjust the biodegradability of the phenolic compounds. The comparative biodegradation study of mono-nitrophenols (electron acceptors) and mono-methylphenols (electron donors) revealed that it is a completely photoregulated process. The closer the donor group (OH−) of the phenolic ring is to the acceptor group (NO2−), the higher the biodegradation values are (2-nitrophenol > 3-nitrophenol > 4-nitrophenol); the further the donor group (OH−) of the phenolic compound is from the second donor group (CH3+), the higher the biodegradation values are (2-methylphenol < 3-methylphenol < 4-methylphenol). However, there are compounds without a specific role of acceptor or donor such as mono-iodophenols, where a type of counteraction between the inductive and resonance effect determines the behavior of the substituent. This fact combined with the presence of the hydroxyl group in the phenolic ring gave the observed stabilization in the biodegradation results of mono-iodophenols (2-iodophenol ≈ 3-iodophenol ≈ 4-iodophenol).

Keywords
CO2 TR, treatment with inorganic carbon source (10% CO2); glc TR, treatment with organic carbon source (5 g/L glucose); CO2 + glc TR, treatment with inorganic and organic carbon sources (10% CO2 + 5 g/L glucose); limit C TR, treatment with limited carbon
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Inductive and resonance effects of substituents adjust the microalgal biodegradation of toxical phenolic compounds
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 135, Issue 4, 31 July 2008, Pages 366–373
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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