Read by QxMD icon Read

Ecotoxicology and Environmental Safety

Lucía N Biruk, Juan Moretton, Alicia Fabrizio de Iorio, Cristian Weigandt, Jimena Etcheverry, Javier Filippetto, Anahí Magdaleno
The aim of this study was to investigate the parameters of chemical extraction associated with the detection of toxicity and genotoxicity in sediment sample extracts. Quantitative analysis of metals and polycyclic aromatic hydrocarbons (PAHs), together with a battery of four bioassays, was performed in order to evaluate the extraction efficiency of inorganic and organic toxicants. The extracts were carried out using two inorganic solvents, two organic solvents and two extraction methodologies, making a total of five extracts...
October 17, 2016: Ecotoxicology and Environmental Safety
Guillermo Blanco, Alexandra Junza, Dolores Barrón
Pharmaceuticals from veterinary treatments may enter terrestrial food webs when medicated livestock are available to wildlife in supplementary feeding stations aimed at the conservation of endangered scavengers. Here, we hypothesized that the exposure risk to livestock fluoroquinolones, as indicators of pharmaceutical burden in food, is related to the variable reliance of scavengers on domestic versus wild animal carcasses. Since the misuse of broad-spectrum antibiotics is a major predisposing factor for opportunistic mycoses, we evaluated disease signs potentially associated with diet-dependent drug exposure in nestlings of two threatened vultures...
October 14, 2016: Ecotoxicology and Environmental Safety
Ishfaq A Sheikh, Iftikhar A Tayubi, Ejaz Ahmad, Majid A Ganaie, Osama S Bajouh, Samera F AlBasri, Ibtihal M J Abdulkarim, Mohd A Beg
Environmental contamination has been one of the major drawbacks of the industrial revolution. Several man-made chemicals are constantly released into the environment during the manufacturing process and by leaching from the industrial products. As a result, human and animal populations are exposed to these synthetic chemicals on a regular basis. Many of these chemicals have adverse effects on the physiological functions, particularly on the hormone systems in human and animals and are called endocrine disrupting chemicals (EDCs)...
October 14, 2016: Ecotoxicology and Environmental Safety
Susana Barros, Rosa Montes, José Benito Quintana, Rosario Rodil, Jorge M A Oliveira, Miguel M Santos, Teresa Neuparth
Triclocarban (TCC), a common antimicrobial agent widely used in many household and personal care products, has been widely detected in aquatic ecosystems worldwide. Due to its high lipophilicity and persistence in the aquatic ecosystems, TCC is of emerging environmental concern. Despite the frequently reported detection of TCC in the environment and significant uncertainties about its long term effects on aquatic ecosystems, few studies have addressed the chronic effects of TCC in aquatic organisms at ecologically relevant concentrations...
October 14, 2016: Ecotoxicology and Environmental Safety
Hassan Mirmonsef, Hanne D Hornum, John Jensen, Martin Holmstrup
Contaminated soil is a problem throughout the industrialized world, and a significant proportion of these sites are polluted with heavy metals such as copper. Ecological risk assessment of contaminated sites requires ecotoxicological studies with spiked soils as well as in-situ ecological observations. Here, we report laboratory and field assessment of copper toxicity for earthworms at a Danish site (Hygum) exclusively contaminated with an increasing gradient in copper from background to highly toxic levels (>1000mgkg(-1) dry soil)...
October 14, 2016: Ecotoxicology and Environmental Safety
Fábio de Melo Tarouco, Filipe Guilherme Andrade de Godoi, Robson Rabelo Velasques, Amanda da Silveira Guerreiro, Marcio Alberto Geihs, Carlos Eduardo da Rosa
Glyphosate based herbicides, including Roundup, are widely employed in agriculture and urban spaces. The objective of this study was to evaluate the toxicological effects of Roundup on the estuarine polychaeta Laeonereis acuta. Biomarkers of oxidative stress as well as acetylcholinesterase and propionilcholinesterase activities were analyzed. Firstly, the LC50 96h for L. acuta was established (8.19mg/L). After, the animals were exposed to two Roundup concentrations: 3.25mg/L (non-observed effect concentration - NOEC) and 5...
October 14, 2016: Ecotoxicology and Environmental Safety
Carlos E Rodríguez-Rodríguez, Karina Madrigal-León, Mario Masís-Mora, Marta Pérez-Villanueva, Juan Salvador Chin-Pampillo
The use of fungal bioaugmentation represents a promising way to improve the performance of biomixtures for the elimination of pesticides. The ligninolyitc fungus Trametes versicolor was employed for the removal of three carbamates (aldicarb, ALD; methomyl, MTM; and methiocarb, MTC) in defined liquid medium; in this matrix ALD and MTM showed similar half-lives (14d), nonetheless MTC exhibited a faster removal, with a half-life of 6.5d. Then the fungus was employed in the bioaugmentation of an optimized biomixture to remove the aforementioned carbamates plus carbofuran (CFN)...
October 14, 2016: Ecotoxicology and Environmental Safety
G Meenakshi, A Sivasamy
Semiconductor zinc oxide nanorods (NRZnO) were prepared by sol-gel technique using zinc acetate as the precursor and ammonia as the precipitating agent. The prepared photocatalyst were characterized by X-ray diffraction (XRD), Fourier Transform Infrared (FTIR), UV-Visible diffuse reflectance spectroscopy (UV-Vis-DRS), X-ray photoelectron spectroscopy (XPS), Field Emission-Scanning Electron Microscopy (FE-SEM), Atomic Force Microscopy (AFM), High Resolution-Tunneling Microscope (HR-TEM), Brunauer, Emmett and Teller (BET) and electron paramagnetic resonance spectroscopy (EPR) analysis...
October 13, 2016: Ecotoxicology and Environmental Safety
Linlin Yao, Yanxin Wang, Lei Tong, Yamin Deng, Yonggang Li, Yiqun Gan, Wei Guo, Chuangju Dong, Yanhua Duan, Ke Zhao
The occurrence of 14 antibiotics (fluoroquinolones, tetracyclines, macrolides and sulfonamides) in groundwater and surface water at Jianghan Plain was investigated during three seasons. The total concentrations of target compounds in the water samples were higher in spring than those in summer and winter. Erythromycin was the predominant antibiotic in surface water samples with an average value of 1.60μg/L, 0.772μg/L and 0.546μg/L respectively in spring, summer and winter. In groundwater samples, fluoroquinolones and tetracyclines accounted for the dominant proportion of total antibiotic residues...
October 13, 2016: Ecotoxicology and Environmental Safety
Upendra Kumar, J Berliner, Totan Adak, Prakash C Rath, Avro Dey, Somnath S Pokhare, Nitiprasad N Jambhulkar, P Panneerselvam, Anjani Kumar, Shyamranjan D Mohapatra
Application of pesticide in agricultural fields is "unnecessary evil" for non-target microflora and fauna. Hence, to identify the safer pesticide molecules against non-target microbes, a long-term pesticide experiment was initiated at National Rice Research Institute, Cuttack, India. In the present study, the effect of continuous application of chlorpyrifos (0.5kgha(-1)) in rice fields on non-target groups of soil microbes and nematodes was studied for seven seasons (four wet and three dry seasons) during 2009-2013...
October 13, 2016: Ecotoxicology and Environmental Safety
Lei Zheng, Zhengtao Liu, Zhenguang Yan, Yahui Zhang, Xianliang Yi, Juan Zhang, Xin Zheng, Junli Zhou, Yan Zhu
Pentachlorophenol (PCP) has been reported toxic to aquatic organisms, and it frequently occurs at relatively high concentrations in most Chinese waters due to the re-emergence of schistosomiasis since 2003. Several studies about Water Quality Criteria (WQC) for PCP had been performed to protect the aquatic ecosystem, but in most of these studies the toxicity data were not properly analyzed (e.g. screening and processing methods). Moreover, little study was carried out on the ecological risk assessment (ERA) based on environmental factors...
October 13, 2016: Ecotoxicology and Environmental Safety
Gagan Preet Singh Sidhu, Harminder Pal Singh, Daizy R Batish, Ravinder Kumar Kohli
The potential of a wild, unpalatable plant Coronopus didymus was investigated for the first time in terms of its capability to tolerate and accumulate cadmium (Cd) for phytoremediation purposes. A screenhouse experiment for 6 weeks was conducted to evaluate the effect of Cd from 100 to 400mgkg(-1) on growth, biomass, photosynthetic apparatus, Cd uptake and accumulation in C. didymus plants. Application of Cd facilitates the growth of the plants whereas at higher levels a slight reduction was noticed. The concentration of Cd in roots and shoots reached a maximum of 867...
October 12, 2016: Ecotoxicology and Environmental Safety
Xi Sun, Lusheng Zhu, Jinhua Wang, Jun Wang, Benying Su, Tong Liu, Cheng Zhang, Chong Gao, Yuting Shao
Ionic liquids (ILs) were considered as "green" solvents and have been used widely because of their excellent properties. But ILs are not as "green" as has been suggested, and the toxic effects of ILs on organisms have been shown in recent years. In the present study, the toxic effects of the IL 1-octyl-3-methylimidazolium tetrafluoroborate ([Omim]BF4) on soil enzyme activity and soil microbial communities at three different concentrations (1.0, 5.0 and 10.0mg/kg) and a control treatment over 40 days of incubation time (sampled on days 10, 20, 30 and 40) were examined under laboratory conditions...
October 11, 2016: Ecotoxicology and Environmental Safety
Qinghuan Xu, Lin Yang, Wangting Yang, Yan Bai, Ping Hou, Jingxian Zhao, Lv Zhou, Zhaojiang Zuo
Eutrophication promotes massive growth of cyanobacteria and algal blooms, which can poison other algae and reduce biodiversity. To investigate the differences in multiple nitrogen (N) sources in eutrophicated water on the emission of volatile organic compounds (VOCs) from cyanobacteria, and their toxic effects on other algal growth, we analyzed VOCs emitted from Microcystis flos-aquae with different types and concentrations of nitrogen, and determined the effects under Normal-N and Non-N conditions on Chlorella vulgaris...
October 11, 2016: Ecotoxicology and Environmental Safety
Erminia Conti, Sandro Dattilo, Giovanni Costa, Concetto Puglisi
Carabids are generally considered to be non-specialized predators, and they have been considered useful ecological indicators. They can play a key role in clarifying the route of contaminants in food webs because they are predators of small invertebrates and, in turn, part of the diet of several vertebrates. The Mediterranean species Parallelomorphus laevigatus, which so far has not been studied from an ecotoxicological point of view, is an excellent ecological indicator in sandy coastal environments. We investigated the accumulation of trace elements in Ionian populations of P...
October 11, 2016: Ecotoxicology and Environmental Safety
Shuvasree Sarkar, Sandip Mukherjee, Ansuman Chattopadhyay, Shelley Bhattacharya
Zebrafish were exposed to a nonlethal dose (1/350LC50; 50µg/L) of As2O3 and sampled at 7, 15, 30, 60 and 90 days of treatment. The oxidative stress response was assessed in terms of time-dependent histopathological changes, lipid peroxidation, GSH status, activities of detoxification enzymes and expression of antioxidant genes in liver and kidney. As2O3 treatment enhanced lipid peroxidation except at day 90 in liver and day 30 in kidney. Glutathione depleted significantly in the liver except on day 30; whereas in kidney, it increased initially but thereafter depleted significantly...
October 10, 2016: Ecotoxicology and Environmental Safety
Mohammad Farhadur Rahman, Anubrata Ghosal, Mohammad Firoz Alam, Ahmad Humayan Kabir
Cadmium (Cd) is an important phytotoxic element causing health hazards. This work investigates whether and how silicon (Si) influences the alleviation of Cd toxicity in field peas at biochemical and molecular level. The addition of Si in Cd-stressed plants noticeably increased growth and development as well as total protein and membrane stability of Cd-stressed plants, suggesting that Si does have critical roles in Cd detoxification in peas. Furthermore, Si supplementation in Cd-stressed plants showed simultaneous significant increase and decrease of Cd and Fe in roots and shoots, respectively, compared with Cd-stressed plants...
October 10, 2016: Ecotoxicology and Environmental Safety
Weijun Tian, Jing Zhao, Yuhang Zhou, Kaili Qiao, Xin Jin, Qing Liu
Changes in root exudates, including low molecular weight organic acids (LMWOAs), amino acids and sugars, in rhizosphere soils during the gel-beads/reeds combination remediation for high molecular weight polycyclic aromatic hydrocarbons (HMW-PAHs) and the degree of the effects on HMW-PAH biodegradation were evaluated in this study. The results showed that the gel-beads/reeds combination remediation notably increased the removal rates of pyrene, benzo(a)pyrene and indeno(1,2,3-cd)pyrene (65.0-68.9%, 60.0-68.5% and 85...
October 10, 2016: Ecotoxicology and Environmental Safety
Joseph M Matong, Luthando Nyaba, Philiswa N Nomngongo
A rapid, simple and green ultrasound-assisted extraction method using deep eutectic solvents (DES) for extraction of As, Cr, Mo, Sb, Se and V in soil samples, has been developed. Choline chloride-oxalic acid based DES was used as a solvent. The target analytes were subsequently quantified using inductively coupled plasma optical emission spectrometer (ICP OES). The parameters that affect the extraction of the target analytes was optimized using standard reference material of San Joaquin soil (SRM 2709a). In the optimization step, a two-level full factorial experimental design was used...
October 10, 2016: Ecotoxicology and Environmental Safety
Lucas B Moreira, Ítalo B Castro, Marcos A Hortellani, Silvio T Sasaki, Satie Taniguchi, Mônica A V Petti, Gilberto Fillmann, Jorge E S Sarkis, Márcia C Bícego, Leticia V Costa-Lotufo, Denis M S Abessa
Tropical marine environments are rich in biodiversity and the presence of harbor activities in these areas can harm the coastal ecosystems. In this study, we assessed sediment quality of two harbors from a tropical region in Brazil by applying multiple lines-of-evidence approach. This approach included the integration of results on: (1) grain size, organic matter, organic carbon, nitrogen, phosphorus, trace metals, polycyclic aromatic hydrocarbons, linear alkylbenzenes, and tributyltin; (2) acute toxicity of whole sediments and chronic toxicity of liquid phases; and (3) benthic community descriptors...
October 7, 2016: Ecotoxicology and Environmental Safety
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"