Zinc Binding by Lactic Acid Bacteria

Clicks: 216
ID: 90711
2009
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Abstract
Zinc is an essential trace element in all organisms. A common method for the prevention of zinc deficiency is pharmacological supplementation, especially in a highly available form of a metalloprotein complex. The potential of different microbes to bind essential and toxic heavy metals has recently been recognized. In this work, biosorption of zinc by lactic acid bacteria (LAB) has been investigated. Specific LAB were assessed for their ability to bind zinc from a water solution. Significant amount of zinc ions was bound, and this binding was found to be LAB species-specific. Differences among the species in binding performance at a concentration range between 10–90 mg/L were evaluated with Langmuir model for biosorption. Binding of zinc was a fast process, strongly influenced by ionic strength, pH, biomass concentration, and temperature. The most effective metal-binding LAB species was Leuconostoc mesenteroides (27.10 mg of Zn2+ per gram of dry mass bound at pH=5 and 32 °C, during 24 h). FT-IR spectroscopy analysis and electron microscopy demonstrated that passive adsorption and active uptake of the zinc ions were involved.
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mrvcic2009zincfood Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Mrvčić, Jasna;Prebeg, Tatjana;Barišić, Lidija;Stanzer, Damir;Bačun-Družina, Višnja;Stehlik-Tomas, Vesna;
Journal food technology and biotechnology
Year 2009
DOI
DOI not found
URL
http://hrcak.srce.hr/file/68382
Keywords
Microbiology Biology (General) Medicine (General) Medicine Engineering (General). Civil engineering (General) Biotechnology Science environmental effects of industries and plants renewable energy sources environmental sciences food processing and manufacture chemical engineering toxicology. poisons general works plant culture

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