title: Kinetics of stereoselective enrichment of Dechlorane Plus in Ulva Pertusa.
abstract: Dechlorane Plus (DP) has been detected extensively in both biotic and abiotic matrices, and stereoselective enrichment of Dechlorane Plus isomers has also been observed in organisms. In this laboratory study, Ulva pertusa were firstly exposed to known Dechlorane Plus concentrations for 21d (uptake period), and then transferred to clean seawater for 14d (depuration period) to investigate the kinetics of Dechlorane Plus isomers in U. pertusa. Dechlorane Plus isomers reached steady-state after 21d of exposure. The mean fractional abundance of syn-DP (fsyn) exceeded than that of 0d (0.23±0.02) during uptake, but decreased during depuration. This study is the first to define the kinetics of stereoselective enrichment of Dechlorane Plus isomers in U. pertusa using two-box kinetic model. The uptake rate constants of the syn- and anti-DP were 0.164±0.056d(-1) and 0.083±0.071d(-1), respectively. The depuration rate constants were 0.337±0.057d(-1) (syn-DP) and 0.236±0.095d(-1) (anti-DP), suggesting that syn-DP is eliminated quicker than anti-DP by U. pertusa. These results are consistent with observation of fsyn and stereoselective enrichment of Dechlorane Plus isomers in U. pertusa.
authors.affiliation: College of Environmental Science and Engineering, Dalian Maritime University, Dalian, Liaoning, PR China; Institute of Environmental Systems Biology, Dalian Maritime University, Dalian, Liaoning, PR China.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhao
authors.affiliation: College of Environmental Science and Engineering, Dalian Maritime University, Dalian, Liaoning, PR China; Institute of Environmental Systems Biology, Dalian Maritime University, Dalian, Liaoning, PR China.
authors.forename: Ning
authors.initials: N
authors.lastname: Gong
authors.affiliation: Department of Physics, Dalian Maritime University, Dalian, Liaoning, PR China. Electronic address: mid@dlmu.edu.cn.
authors.forename: Dong
authors.initials: D
authors.lastname: Mi
authors.affiliation: College of Environmental Science and Engineering, Dalian Maritime University, Dalian, Liaoning, PR China; Institute of Environmental Systems Biology, Dalian Maritime University, Dalian, Liaoning, PR China.
authors.forename: Chundi
authors.initials: C
authors.lastname: Luan
authors.affiliation: National Marine Environmental Monitoring Center, Dalian, Liaoning, PR China.
authors.forename: Kuishuang
authors.initials: K
authors.lastname: Shao
authors.affiliation: College of Environmental Science and Engineering, Dalian Maritime University, Dalian, Liaoning, PR China; International Joint Research Center for Persistent Toxic Substances, Dalian Maritime University, Dalian, Liaoning, PR China.
authors.forename: Hongliang
authors.initials: H
authors.lastname: Jia
authors.affiliation: College of Environmental Science and Engineering, Dalian Maritime University, Dalian, Liaoning, PR China; Institute of Environmental Systems Biology, Dalian Maritime University, Dalian, Liaoning, PR China. Electronic address: yqsun@dlmu.edu.cn.
authors.forename: Yeqing
authors.initials: Y
authors.lastname: Sun
mesh_terms: D004784:Environmental Monitoring; D005411:Flame Retardants / Q000032:analysis* / Q000378:metabolism; D006843:Hydrocarbons, Chlorinated / Q000032:analysis* / Q000378:metabolism; D007700:Kinetics; D011083:Polycyclic Compounds / Q000032:analysis* / Q000378:metabolism; D012623:Seawater / Q000032:analysis; D013237:Stereoisomerism; D044445:Ulva / Q000737:chemistry / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000378:metabolism
chemical_list: D005411:Flame Retardants; D006843:Hydrocarbons, Chlorinated; D011083:Polycyclic Compounds; D014874:Water Pollutants, Chemical; C526360:dechlorane plus
keywords: Dechlorane Plus; Kinetics; Two-box model; Ulva pertusa