title: Concentration-dependent effects of carbon nanotubes on growth and biphenyl degradation of Dyella ginsengisoli LA-4.
abstract: To enrich the understanding on interactions between carbon nanotubes (CNTs) and microbes, the responses of a biphenyl-degrading bacterium to single-walled carbon nanotubes (SWCNTs), multi-walled carbon nanotubes (MWCNTs) and carboxyl single-walled carbon nanotubes (SWCNT-COOHs) were investigated. Electron microscopy, viability test, cellular membrane integrity, and oxidative stress analyses indicated that CNT toxicity was mainly caused by physical piercing. Apart from antibacterial activities, the experimental results showed that CNTs enhanced cell growth and biphenyl degradation at certain concentrations (1.0-1.5 mg/L). The CNTs aggregated and adsorbed cells and biphenyl to form a CNTs-cells-biphenyl coexisting system, thus it created a suitable microenvironment for cell attachment and proliferation where the cells could utilize biphenyl easier for their growth. To the best of our knowledge, this is the first report about CNTs' impact on biodegradation efficacy and growth of aromatic-degrading bacterium.
authors.affiliation: State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China. qyy@dlut.edu.cn.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Qu
authors.affiliation: State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
authors.forename: Jingwei
authors.initials: J
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.|Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Food and Environmental, Dalian University of Technology, Panjin, 124000, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
authors.forename: Qiao
authors.initials: Q
authors.lastname: Ma
authors.affiliation: State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
authors.forename: Zhaojing
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
authors.forename: Duanxing
authors.initials: D
authors.lastname: Li
authors.affiliation: State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
authors.forename: Wenli
authors.initials: W
authors.lastname: Shen
authors.affiliation: State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
authors.forename: Jiti
authors.initials: J
authors.lastname: Zhou
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001673:Biodegradation, Environmental / Q000187:drug effects; D001713:Biphenyl Compounds / Q000378:metabolism*; D004305:Dose-Response Relationship, Drug; D020563:Gammaproteobacteria / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D037742:Nanotubes, Carbon; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D000900:Anti-Bacterial Agents; D001713:Biphenyl Compounds; D037742:Nanotubes, Carbon; D014874:Water Pollutants, Chemical; C010574:biphenyl
keywords: Biodegradation; Carbon nanotubes; Functional bacterium