Read by QxMD icon Read

Archives of Environmental Contamination and Toxicology

Erik Schmude, Hannah M H Ertl, Robert J Taylor, Miguel A Mora
Northern bobwhites (Colinus virginianus) have been declining across the range of the species primarily due to habitat loss and habitat fragmentation. There is increasing concern regarding effects related to elevated environmental contaminants, including pesticides and metals. Elevated concentrations of some metals are known to have adverse effects on reproduction, development, and survival in birds; however, little research has been conducted on metal exposure in wild bobwhites. We analyzed metal concentrations in the feathers of 60 bobwhites from 3 ecoregions in Texas and evaluated differences between age-class, gender, and location with the objective of determining if bobwhites in Texas are at increased risk of exposure to elevated metal concentrations...
March 17, 2018: Archives of Environmental Contamination and Toxicology
Jennifer J Trowell, Frank A P C Gobas, Margo M Moore, Christopher J Kennedy
Determining the biotransformation potential of commercial chemicals is critical for estimating their persistence in the aquatic environment. In vitro systems are becoming increasingly important as screening methods for assessing the potential for chemical metabolism. Depletion rate constants (kd ) for several organic chemicals with high octanol-water partition coefficient (Kow ) values (9-methylanthracene, benzo(a)pyrene, chrysene, and PCB-153) in rainbow trout hepatocytes were determined to estimate biotransformation rate constants (kMET ) that were used in fish bioconcentration factor (BCF) models...
March 17, 2018: Archives of Environmental Contamination and Toxicology
Khushi Mukherjee, Krishnendu Acharya
Metal oxide nanoparticles (MO-NPs) with multifunctional properties are used extensively in various industries and released into the environment as industrial effluents and waste nano-products. These non-degradable, toxic MO-NPs are accumulating in the environment, debilitating the ecosystem and their biological communities. In this review article, a real-time scenario of MO-NP toxicity towards the soil and aquatic ecosystem and their mode of toxicity have been addressed in detail. The up-to-date information presented here suggests serious consideration of the consequences before random utilization of MO-NPs...
March 16, 2018: Archives of Environmental Contamination and Toxicology
Gregory Douglas, Jeffery Hardenstine, Shahrokh Rouhani, Deyuan Kong, Ray Arnold, Will Gala
Site investigations require the collection and analysis of representative environmental samples to delineate impacts, risks, and remediation options. When environmental samples are collected, concentrations of semi-volatile polycyclic aromatic hydrocarbons (PAHs) begin to change due to several processes, such as evaporation, adsorption, precipitation, photo, and microbial degradation. Preservation techniques are used to minimize these changes between collection and analysis. The most common techniques are refrigeration, freezing, and acidification...
March 13, 2018: Archives of Environmental Contamination and Toxicology
Michael Raessler
Arsenic is a widespread contaminant of drinking and groundwaters in the world. Even if these contaminations have a geogenic origin, they often are exacerbated by anthropogenic activities. This is particularly true for the Bengal delta. Millions of people in Bangladesh are consuming drinking water with arsenic concentrations ≥ 50 µg/L. Their drinking water supply is based on groundwaters extracted by pumping wells, which were part of a well-drilling program by the United Nations. The intention was to provide the people with groundwater instead of surface water due to its critical hygienic conditions...
March 8, 2018: Archives of Environmental Contamination and Toxicology
A V Botello, F S Villanueva, R F Rivera, A L Velandia, G E de la Lanza
This study focused on dating of a sediment core from the Alvarado Lagoon System, Veracruz, Mexico, calculating the sedimentation rate by using210 Pb to determine the tendency towards pollution by polycyclic aromatic hydrocarbons, organochlorides, the metals Cd, Cr, Cu, Hg, Ni, Pb, and V, and organic matter content. The activity of total Pb and supported Pb in the samples was 83.1 and 29.5 Bq kg-1 , respectively, whereas the average estimated sedimentation rate was 0.48 ± 0.09 cm per year-1 . The organic matter values exhibited linear behavior throughout the historical profile, with values under 2...
March 6, 2018: Archives of Environmental Contamination and Toxicology
Dragana Pavlović, Marija Pavlović, Dragan Čakmak, Olga Kostić, Snežana Jarić, Sanja Sakan, Dragana Đorđević, Miroslava Mitrović, Ivan Gržetić, Pavle Pavlović
The main soil properties, concentrations of selected elements (As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn), and the chemical speciation of each element were determined in urban soil samples taken from urban parks in four Serbian cities (Belgrade, Pančevo, Obrenovac, and Smederevo) exposed to different sources of pollution. Pollution indices (PI, PIN ) and factors (MF, ICF, GCF) also were evaluated. The study revealed As and Cd concentrations below the detection limit, whereas the content of Cr, Cu, Fe, Mn, Ni, Pb, and Zn at some sites exceeded the limits established by local regulations, as well as the background values, which may represent an environmental threat...
March 5, 2018: Archives of Environmental Contamination and Toxicology
Marek Tarnawski, Agnieszka Baran
This study is was designed to assess the ecological risk associated with chemical pollution caused by heavy metals and PAHs on the basis of their ecotoxicological properties in sediments collected from the Rzeszów dam reservoir (Poland). The sediment samples were collected from three sampling stations: S1-inlet, backwater station, S2-middle of reservoir, S3 outlet, near the dam. The sediments' toxicity was evaluated using a battery of bioassays (Phytotoxkit, Phytotestkit, Ostracodtoxkit F, and Microtox). The highest content of metals (120...
February 27, 2018: Archives of Environmental Contamination and Toxicology
Tongtong Zhou, Jun Wang, Zhiqiang Ma, Zhongkun Du, Cheng Zhang, Lusheng Zhu, Jinhua Wang
Ionic liquids (ILs), also called room temperature ILs, are widely applied in many fields on the basis of their unique physical and chemical properties. However, numerous ILs may be released into and gradually accumulate in the environment due to their extensive use and absolute solubility. The effects of 1-alkyl-3-methylimidazolium nitrate ([Cn mim]NO3 , n = 4, 6, 8) on soil pH, conductivity, cation exchange capacity, microbial biomass carbon, and microbial biomass nitrogen were examined at the doses of 1, 10, and 100 mg/kg on days 10, 20, 30, and 40...
February 24, 2018: Archives of Environmental Contamination and Toxicology
P L Klerks, A Kascak, A M Cazan, N Deb Adhikary, A Chistoserdov, A Shaik, S Osman, F R Louka
The relationship between organisms and contaminants may be a two-way interaction: contaminants affecting the biota and the biota affecting the environmental fate and distribution of the contaminants. This may be especially so for sediment-dwelling organisms, because their burrowing and feeding can drastically influence sediment characteristics. The present study looked at the influence of the suspension-feeding stout razor clam Tagelus plebeius on the distribution of crude oil and pyrene in greenhouse mesocosm experiments...
February 22, 2018: Archives of Environmental Contamination and Toxicology
Rafael André Lourenço, Eleine Francioni, Antonio Henrique M F T da Silva, Caio Augusto Magalhães, Fabiana Dias Costa Gallotta, Fabio Francisco de Oliveira, João Maximino de Souza, Leandro Franco Macena de Araújo, Liliane Pequeno de Araújo, Marcus Antonio G de Araújo Júnior, Maria de Fátima Guadalupe Meniconi, Monica Aparecida Ferreira de Souza Bindes Gomes Lopes
The main effluent of oil and gas production is the discharge of produced water (PW). Despite the potential environmental impact, the structure of oil and gas platforms can act as artificial reefs. Two species of fish, Caranx crysos and Tylosurus acus, were captured under two discharging platforms at Campos Basin, P19 and P40. A nondischarging platform, P25, was taken as reference. The highest median concentration of PAH in muscle tissue was observed for C. Crysos at P40 (219.38 ng g-1 ) followed by P19 (68...
February 20, 2018: Archives of Environmental Contamination and Toxicology
P Bawa, J S Bedi, J P S Gill, R S Aulakh, A Kumar, Kamal Arora
In the present study, persistent organic pollutants (POPs), including six congeners of polychlorinated biphenyls (PCBs) and organochlorine pesticides, were estimated in human breast milk samples collected from two districts of Punjab (India). The mean concentrations of POP residues were recorded higher in Bathinda district (PCBs: 33.7; DDTs: 519.2; HCHs: 46.6 ng g-1 lipid wt.) than Ludhiana (PCBs: 24.2; DDTs; 415.3; HCHs; 35.5 ng g-1 lipid wt.). Levels of PCBs and DDTs were observed higher in primiparas, whereas HCHs residues were seen more in multiparas...
February 19, 2018: Archives of Environmental Contamination and Toxicology
Chun-Hua Liao, Xu-Jiang He, Zi-Long Wang, Andrew B Barron, Bo Zhang, Zhi-Jiang Zeng, Xiao-Bo Wu
Pesticides are considered one of the major contemporary stressors of honey bee health. In this study, the effects of short-term exposure to lambda-cyhalothrin on lifespan, learning, and memory-related characteristics of Apis mellifera were systematically examined. Short-term exposure to lambda-cyhalothrin in worker bees reduced lifespan, affected learning and memory performance, reduced the homing ability, and influenced the expression levels of two learning and memory-related genes of A. mellifera. This research identifies the nature of the sublethal effects of lambda-cyhalothrin on bees and the level of exposure that can be harmful to bee health...
February 8, 2018: Archives of Environmental Contamination and Toxicology
Arlete Prado-Silva, Lorena Andrade Nunes, Jádilla Mendes Dos Santos, Paulo Roberto Antunes de Mello Affonso, Ana Maria Waldschmidt
Bees are major pollinators of both native flora and cultured crops. Nonetheless, despite their key functional role in ecosystems and agriculture, bee populations have been affected worldwide by deforestation and contamination by insecticides. Conversely, little is known about the effects of pesticides on morphogenetic development of neotropical stingless bees. We compared the fluctuating asymmetry (FA) in newly emerged bees and foragers of Melipona quadrifasciata anthidioides exposed to pesticides (experimental greenhouse and cultivated field)...
February 7, 2018: Archives of Environmental Contamination and Toxicology
B B Castro, A R Freches, M Rodrigues, B Nunes, S C Antunes
The assessment of transgenerational effects should be incorporated in standard chronic toxicity protocols for the sake of a realistic extrapolation of contaminant effects to the population level. We propose a simple add-on to the standard 21-day chronic Daphnia magna assay, allowing the assessment of the reproductive performance of the offspring (F1 generation) born from the first clutch of the parental (F0) generation. The extended generational assay was performed simultaneously with the standard reproduction assay...
January 24, 2018: Archives of Environmental Contamination and Toxicology
Pete Cadmus, Stephen F Brinkman, Melynda K May
Iron is a common pollutant in waters near coal and hard rock mine disturbances. The current 1000 µg/L total recoverable chronic criterion for iron (Fe) for protection of aquatic life in the United States was developed using very limited data in 1976 and has not been revised since. To develop a more scientifically based criterion, several chronic laboratory toxicity experiments (> 30 days) were conducted with ferric Fe at circumneutral pH on a taxonomically diverse group of organisms including brown trout (Salmo trutta), mountain whitefish (Prosopium williamsoni), boreal toad tadpoles (Bufo boreas), the oligochaete worm Lumbriculus variegatus, the mayfly Hexagenia limbata, and the planarian Dugesia dorotocephala...
January 22, 2018: Archives of Environmental Contamination and Toxicology
Marina F M Santana, Fabiana T Moreira, Camilo D S Pereira, Denis M S Abessa, Alexander Turra
The environmental impact of microplastics is a challenging theme, especially under realistic experimental conditions. We investigated physiological responses to 0.1-1.0 μm PVC particles intake by the mussel Perna perna after a relative long-term exposure (90 days) at a less extreme concentration compared with previous studies (0.125 g/L). Microplastic intake was inferred by the presence of PVC in the feces of mussels, and physiological damages were assessed through ingestion rate, assimilation efficiency, growth rate, cellular and molecular biomarkers (lysosomal integrity, lipid peroxidation, and DNA damage), and condition index...
January 19, 2018: Archives of Environmental Contamination and Toxicology
Mark S Castro, Robert H Hilderbrand, Morgan Kaumeyer
The purpose of this study was to increase our understanding of the bioaccumulation of mercury in northern two-lined salamanders (Eurycea bislineata bislineata) in freshwater stream ecosystems. We collected 111 adults and 131 larval northern two-lined salamanders from six streams in Garrett County, Maryland. These salamanders were collected in April, July, and September 2010. We measured the size and tissue mercury content in all of these salamanders. We also measured the total and methyl mercury concentrations in stream water on monthly basis from April through December 2010...
January 13, 2018: Archives of Environmental Contamination and Toxicology
Davor Želježić, Snježana Herceg Romanić, Darija Klinčić, Marijana Matek Sarić, Judita Grzunov Letinić
This study investigated the levels and distribution of 17 polychlorinated biphenyls (PCBs) and organochlorine pesticides (HCB, α-HCH, β-HCH, γ-HCH, p,p'-DDE, p,p'-DDD, and p,p'-DDT) in placenta samples from women living in the coastal area of Croatia. During November 2012 to February 2013, 51 placenta samples were collected from healthy mothers. This study presents the first report about Croatian placenta samples. Each of the analysed compounds were found in all of the samples; all of the maximum values were < 1 ng g-1 w...
January 9, 2018: Archives of Environmental Contamination and Toxicology
Emiko Kusanagi, Hitoshi Takamura, Shing-Jen Chen, Mayumi Adachi, Nobuko Hoshi
Exposure to methylmercury (MeHg) during the foetal and postnatal periods is known to have adverse effects on children's development. However, little attention has been paid to MeHg exposure during early childhood in Japan. To examine the regional differences in MeHg exposure and seafood consumption and the association between MeHg exposure and seafood consumption and dental metal restorations, we measured the total mercury (T-Hg) concentration in hair as an MeHg exposure index, and using questionnaires, we measured the frequency and amount of seafood consumption and the presence of dental metal restorations in 118 children aged 3-6 years in five regions of Japan...
January 8, 2018: Archives of Environmental Contamination and Toxicology
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"