title: Uptake of caprolactam and its influence on growth and oxygen production of Desmodesmus quadricauda algae.
abstract: The consumption of polyamides produced from caprolactam is increasing continuously, and for that reason the danger of environmental contamination by this lactam is also rising. This study's aim was to evaluate the influence of caprolactam on the growth and oxygen production of the green alga Desmodesmus quadricauda and on caprolactam uptake by this alga. The presence of caprolactam in water was observed to cause the algae significantly to increase its oxygen production. Caprolactam concentration of 5,000 mg/L stopped algae growth after 6 days and influenced coenobia structure (seen as disappearance of pyrenoids, deformation of cells) but did not decrease the number of cells in the coenobia. Caprolactam uptake is probably passive but relatively rapid. Maximum concentration in the algae was reached after 18-24 h.
authors.affiliation: Faculty of Agriculture, University of South Bohemia, Studentská 13, 370 05 České Budějovice, Czech Republic. Electronic address: janak@zf.jcu.cz.
authors.forename: Jana Pexová
authors.initials: JP
authors.lastname: Kalinová
authors.affiliation: Laboratory of Metabolomics and Isotopic Analyses, Global Change Research Centre, Academy of Sciences of the Czech Republic, Branišovská 31, České Budějovice 370 05, Czech Republic.
authors.forename: Jan
authors.initials: J
authors.lastname: Tříska
authors.affiliation: Laboratory of Metabolomics and Isotopic Analyses, Global Change Research Centre, Academy of Sciences of the Czech Republic, Branišovská 31, České Budějovice 370 05, Czech Republic.
authors.forename: Naděžda
authors.initials: N
authors.lastname: Vrchotová
authors.affiliation: Institute of Complex Systems, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Faculty of Fisheries and Protection of Waters, University of South Bohemia in Ceske Budejovice, Zámek 136, 373 33 Nové Hrady, Czech Republic.
authors.forename: Jan
authors.initials: J
authors.lastname: Novák
mesh_terms: D002209:Caprolactam / Q000633:toxicity*; D000460:Chlorophyta / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D010100:Oxygen / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D014874:Water Pollutants, Chemical; D002209:Caprolactam; D010100:Oxygen
keywords: Algae; Biosorption; Growth; Lactam; Pollution; Pyrenoid