fulltext.study @t Gmail

Bioenergetic strategy of microalgae for the biodegradation of phenolic compounds—Exogenously supplied energy and carbon sources adjust the level of biodegradation

Paper ID Volume ID Publish Year Pages File Format Full-Text
25371 43570 2007 11 PDF Available
Title
Bioenergetic strategy of microalgae for the biodegradation of phenolic compounds—Exogenously supplied energy and carbon sources adjust the level of biodegradation
Abstract

The biodegradation of phenolic compounds by microalgae seems to be not a simple feature of a particular organism, but mostly a bioenergetic process depending on the growth conditions, especially on the exogenously supplied energy (carbon and light) sources. By using chlorophyll fluorescence induction measurements to estimate the molecular structure and function of the photosynthetic apparatus and therefore the tolerance/sensitivity of microalgae incubated with phenols, it can be assumed that, at least in low concentrations, phenol have no toxic effects on the cultures and can be used as alternative carbon source in them. Halophenols (chlorophenols, bromophenols and iodophenols) are quite toxic for the microalgal cultures. In halophenols the first step of the biodegradation is the split of the halogen substituent (dehalogenation). This is strongly determined by the bond dissociation energy of the corresponding substituent and therefore the energetic requirement for the biodegradation of halophenols increases following the sequence: iodophenol < bromophenol < chlorophenol. Additionally, the meta-position of the halogen on the phenol ring needs more energy than the ortho- and the para-one. These are possible explanations of the fact that the biodegradation of halophenols needs additional energy sources that can be exogenously supplied as organic carbon (glucose) or inorganic carbon (CO2).

Keywords
[CO2 TR], treatment with inorganic carbon source (10% CO2); [glu TR], treatment with organic carbon source (5 g/L glucose); [CO2 + glu TR], treatment with inorganic and organic carbon sources (10% CO2 + 5 g/L glucose); [limit C TR], treatment with limited
First Page Preview
Bioenergetic strategy of microalgae for the biodegradation of phenolic compounds—Exogenously supplied energy and carbon sources adjust the level of biodegradation
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 129, Issue 4, 10 May 2007, Pages 706–716
Authors
, ,
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
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us