Abstract：
:The present study characterized the chronic effect of binary-metal mixtures of cadmium (Cd) and zinc (Zn) on Daphnia magna. The titration design was chosen to characterize the 21-d chronic effects of the binary-metal mixtures on survival, growth, reproduction, and metal accumulation in D. magna. Using this design, increasing concentrations of Zn (10, 20, 40, 80, 120, 160, and 200 μg/L) were titrated against a constant concentration of 1.5 μg/L Cd. The results demonstrated that Cd was highly toxic to D. magna. In a mixture with Cd and Zn, sublethal concentrations of 10 and 20 μg/L Zn were insufficient to protect D. magna from chronic Cd toxicity, whereas mixtures containing 40, 80, and 120 μg/L Zn provided strong protective effects to D. magna at all endpoints and resulted in less-than-additive effects. At higher Zn concentrations, such as 160 and 200 μg/L, Zn appeared to contribute to the toxicity. The less-than-additive effects observed in the Cd-Zn mixture can be explained by the decrease in body Cd concentration when the Zn concentration was increased in the exposure media. Embryos analyzed for morphological alterations in the Cd-Zn mixtures demonstrated severe developmental defects. The effect of Cd on undeveloped embryos while both Zn and Cd are present in the organisms raises a question of whether the competitive binding mechanism of Zn and Cd is still happening at the cellular level in the organisms. The results of the present study are useful for development of the biotic ligand model and environmental quality guidelines for metal mixtures. Environ Toxicol Chem 2017;36:2739-2749. © 2017 SETAC.
journal_name
Environ Toxicol Chemjournal_title
Environmental toxicology and chemistryauthors
Pérez E,Hoang TCdoi
10.1002/etc.3830subject
Has Abstractpub_date
2017-10-01 00:00:00pages
2739-2749issue
10eissn
0730-7268issn
1552-8618journal_volume
36pub_type
杂志文章abstract：:The toxicity and efficacy of a bacteria-based commercial bioremediation agent (CBA) was assessed through bioassays with juvenile inland silverside minnows, Menidia beryllina, and flask studies of oil degradation. Addition of the CBA to weathered Alaska, USA North Slope crude oil (ANS-521) prior to testing increased to...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：
更新日期：2003-01-01 00:00:00
abstract：:Field populations of aquatic organisms, particularly those inhabiting flowing waters, likely are exposed to short pulses of pesticides following periods of spray drift, surface runoff, or drain flow. In the present study, we investigated the effect of pulse exposures of a pyrethroid insecticide, esfenvalerate, on surv...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/03-547.1
更新日期：2005-01-01 00:00:00
abstract：:Total mercury and stable isotopes of nitrogen (δ(15) N) were measured in samples from 57 species of invertebrates (17 species) and finfish (40 species) from the coastal waters off southwest Florida, USA, to evaluate the biomagnification of mercury through the food web. Mercury concentrations (wet wt) and δ(15) N value...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.2416
更新日期：2014-01-01 00:00:00
abstract：:Environmental factors, in particular temperature, have been shown to affect the toxicity of chemicals. In the present study the authors exposed the nematode Caenorhabditis elegans to five concentrations of Cd (2, 4, 6, 8, and 10 mg Cd/L agar) at four constant temperatures (11, 15, 18, and 21°C) and monitored survival ...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.1746
更新日期：2012-04-01 00:00:00
abstract：:We examined the subcellular partitioning of zinc (Zn) in Daphnia magna both under acute and chronic exposures. In the acute Zn toxicity tests, the daphnids were exposed to different Zn concentrations for 48 h or to one lethal concentration (1,000 microg/L) for different durations (time to death for up to 47 h). Signif...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.229
更新日期：2010-08-01 00:00:00
abstract：:The relative sensitivity of 17 noncrop plant species from Oregon's Willamette Valley was determined in response to glyphosate, tribenuron methyl (tribenuron), and fluazifop-p-butyl (fluazifop) herbicides. For glyphosate, Elymus trachycaulus, Festuca arundinacea, Madia elegans, Potentilla gracilis, and Ranunculus occid...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.2331
更新日期：2013-11-01 00:00:00
abstract：:The effects of salinity, gender, and development on the acute toxicity of aldicarb were examined in the euryhaline fish, Japanese medaka (Oryzias latipes). The 96-h median lethal concentrations (LC50s) at 1.5 parts per thousand (per thousand) salinity were not significantly different between adults and juveniles but l...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：
更新日期：2001-09-01 00:00:00
abstract：:The risk to adjacent aquatic systems posed by leachates from scrap tires used in engineering applications has not been characterized adequately. Toxicity testing, toxicity identification evaluation (TIE), and groundwater modeling were used to determine the circumstances under which tire shreds could be used as roadbed...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/04-532r2.1
更新日期：2006-02-01 00:00:00
abstract：:The aim of the present work was to study the effect of Cd2+ exposure on metallothionein (MT) induction and on the distribution of metals (Cd, Cu, and Zn) in the terrestrial pulmonate Helix aspersa. In particular, the soluble and nonsoluble pools of the accumulated metals and their tissue distribution in uncontaminated...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/07-232.1
更新日期：2008-07-01 00:00:00
abstract：:Fluvalinate has been extensively used in the United States to combat honey bee colony loss due to Varroa destructor mites. Our objectives were to investigate the extent of fluvalinate contamination in commercially available wax and to define exposure pathways to larval and adult honey bees. All the commercial wax test...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.4427
更新日期：2019-06-01 00:00:00
abstract：:The present study determined concentrations of estrogenic bisphenol A (BPA), nonylphenol, octylphenol (4-tert-octylphenol), butylphenol (4-tert-butylphenol), and progestogenic norethindrone by liquid chromatography-tandem mass spectrometry in bile extracts from field fish from the Xin'an River and market fish in Shang...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.3176
更新日期：2016-01-01 00:00:00
abstract：:This study was designed to investigate whether or not chronic exposure to Chornobyl radiation poses a molecular genetic risk to mammals by examining a relatively rapidly evolving genetic system, mitochondrial DNA (mtDNA). More mtDNA mutations (approximately 19%) and an increase in mtDNA heteroplasmy (approximately 5%)...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：
更新日期：2002-06-01 00:00:00
abstract：:The major toxaphene metabolites in sediment and soils (2-exo,3-endo,6-exo,8,9,10-hexachlorobornane [B6-923] and 2-endo,3-exo,5-endo,6-exo,8,9,10-heptachlorobornane [B7-1001]) were incubated with the isolated gram-negative bacterium Dehalospirillum multivorans. Within 14 d, biotransformation of B7-1001 was nearly quant...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/03-221
更新日期：2004-03-01 00:00:00
abstract：:We coupled intensive population monitoring with collection of blood samples from 383 nesting Pacific common eiders (Somateria mollisima v-nigrum) at two locations in Alaska (USA) from 2002 to 2004. We investigated annual, geographic, and within-season variation in blood concentrations of lead and selenium; compared ex...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/06-537r.1
更新日期：2007-07-01 00:00:00
abstract：:Although the introduction of non-native fish species has been shown to alter trophic ecology in aquatic ecosystems, there has been limited research on how invasive species alter methylmercury (MeHg) biomagnification in lacustrine food webs. We sampled surface water and biota from 8 lakes in Quebec, Canada, spanning a ...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.4831
更新日期：2020-11-01 00:00:00
abstract：:Understanding the environmental risks of pharmaceuticals and personal care products (PPCPs) has become very important in the field of aquatic toxicology. Hydroxylpropyl-β-cyclodextrin (HPβCD) is an amphiphilic, toroidal shaped molecule with the ability to form noncovalent inclusion complexes with a variety of guest mo...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.3280
更新日期：2016-06-01 00:00:00
abstract：:The present study aimed to assess the bioavailability and toxicity of lead nitrate and lead chloride to Enchytraeus crypticus in a natural standard soil. Worms were exposed to Pb-spiked soil for 21 d, and survival and reproduction were related to total, 0.01 M CaCl2 -extractable, and porewater Pb concentrations in the...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.3738
更新日期：2017-08-01 00:00:00
abstract：:Soil samples spiked with five concentrations of pyrene and phenanthrene were aged for 0, 10, 40, and 120 d before toxicity was investigated using a standardized bioassay with the soil-dwelling collembolan Folsomia fimetaria L. Toxic effects were measured as reductions in survival and reproductive output after 3 weeks ...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/1551-5028(2002)021<0489:soteos>2.0.co;2
更新日期：2002-03-01 00:00:00
abstract：:The rising potential for the release of engineered nanoparticles (ENPs) into aquatic environments requires evaluation of risks to protect ecological health. The present review examines knowledge pertaining to the interactions of metal-based ENPs with aquatic higher plants, identifies information gaps, and raises consi...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章,评审
doi：10.1002/etc.3364
更新日期：2016-07-01 00:00:00
abstract：:The effects of point-source and diffuse discharges on resident populations of brown bullhead catfish (Ameiurus nebulosus (LeSueur, 1819)) in the Waikato River (New Zealand) were assessed at sites both upstream and downstream of point-source discharges. At each site, the population parameters, relative abundance, age s...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/05-315r.1
更新日期：2006-07-01 00:00:00
abstract：:Toxicokinetics describe the time course of xenobiotics in an exposed organism. The steady state concentration of the xenobiotic is a characteristic of frequent concern, often summarized in terms of bioaccumulation factors (BAFs). Two experimental protocols are commonly used when estimating BAFs: a continuous exposure ...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：
更新日期：2003-04-01 00:00:00
abstract：:Northern bobwhite (quail) (Colinus virginianus) and scaled quail (Callipepla squamata) populations have declined dramatically in the Rolling Plains ecoregion of Texas and Oklahoma (USA). There is rising concern about potential toxicity of neonicotinoids to birds. To investigate this concern, the authors examined crops...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.3305
更新日期：2016-06-01 00:00:00
abstract：:The sorption properties of tetracycline were compared between a coal humic acid (CHA) and a soil humic acid (SHA) under various solution chemistry conditions. Structural characteristics of the two humic acids were quantified in detail by elemental analysis, solid-state (13)C nuclear magnetic resonance (NMR), acid-base...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.248
更新日期：2010-09-01 00:00:00
abstract：:Various statistical tests on concentration data serve to support decision-making regarding characterization and monitoring of contaminated media, assessing exposure to a chemical, and quantifying the associated risks. However, the routine statistical protocols cannot be directly applied because of challenges arising f...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章,评审
doi：10.1002/etc.4046
更新日期：2018-03-01 00:00:00
abstract：:Isothiocyanates of natural origin produced by the hydrolysis of plant-produced glucosinolates have the potential to control soil pests, but getting sufficiently high isothiocyanate concentrations in soil is difficult. Furthermore, the isothiocyanates have proven toxic to a wide range of organisms and hence may also ha...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/08-516.1
更新日期：2009-06-01 00:00:00
abstract：:Toxicity identification evaluations (TIEs) were performed on seven produced water (PW) effluents from inland discharge facilities operated in Trinidad and Tobago, a Caribbean tropical country with one of the oldest commercial oil industries in the world. The research was performed to determine the presence and magnitu...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/02-530
更新日期：2004-05-01 00:00:00
abstract：:Embryonic zebrafish were used to compare the uptake and metabolism of six polybrominated diphenyl ether (PBDE) congeners (BDEs 28, 47, 99, 100, 153, and 183) and identified metabolites from static exposures at 24 and 120 h postfertilization (hpf). An inverse relationship was observed between uptake of PBDEs and their ...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.2163
更新日期：2013-04-01 00:00:00
abstract：:Estimates of potential aquatic exposure concentrations arising from the use of pyrethroid insecticides on cotton produced using conventional procedures outlined by the U.S. Environmental Protection Agency's Office of Pesticide Programs Environmental Fate and Effects Division seem unrealistically high. Accordingly, the...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/1551-5028(2001)020<0669:praocp>2.0.co;2
更新日期：2001-03-01 00:00:00
abstract：:Stenotrophomonas sp. CD02 was isolated from a site that previously had been contaminated with high concentrations of the heavy metals cadmium (3 mg kg(-1)) and chromium (115 mg kg(-1)). This strain was able to grow on complex (Luria Bertani) medium containing high concentrations of cadmium ion (up to 4 mM). Additional...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/06-280r.1
更新日期：2007-04-01 00:00:00
abstract：:The avian embryo is an excellent model for testing adverse developmental effects of environmental chemicals as well as uptake and movement of xenobiotics within the egg compartments. Before incubation at embryonic day 0, 14 C 3,3',4,4'-tetrachlorobiphenyl (14 C PCB 77) was injected into Japanese quail eggs either onto...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.3977
更新日期：2018-01-01 00:00:00
