journal
MENU ▼
Read by QxMD icon Read
search

Ecotoxicology and Environmental Safety

journal
https://www.readbyqxmd.com/read/28806565/implications-of-biological-factors-on-accumulation-of-persistent-organic-pollutants-in-antarctic-notothenioid-fish
#1
J M Ríos, N B Lana, N F Ciocco, A Covaci, E Barrera-Oro, E Moreira, J C Altamirano
In the present study, the possible associations between selected persistent organic pollutants (POPs) and biological factors were assessed in different tissues of two Antarctic notothenioid fish: Notothenia rossii (NOR) and Trematomus newnesi (TRN) collected at Potter Cove, King George Island/Isla 25 de Mayo, South Shetland Islands. Specifically, association patterns between biological factors (body size, lipid content, body condition) and POP concentrations (polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethane (DDT) and metabolites, polybrominated diphenyl ethers (PBDEs), and hexachlorocyclohexane (HCH), hexachlorobenzene (HCB), chlordanes (CHLs) and methoxylated polybrominated diphenyl ethers (MeO-PBDEs)), were explored by using two approaches: multivariate analyses (principal component analysis: PCA) and intraspecific correlations...
August 11, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28806564/tissue-distribution-and-toxicity-effects-of-myclobutanil-enantiomers-in-lizards-eremias-argus
#2
Li Chen, Ruiting Li, Jinling Diao, Zhongnan Tian, Shanshan Di, Wenjun Zhang, Cheng Cheng, Zhiqiang Zhou
In recent years, serious environmental pollution has caused a decrease in the abundance of many species worldwide. Reptiles are the most diverse group of terrestrial vertebrates. There are large amounts of toxicological data available regarding myclobutanil, but the adverse effects of myclobutanil on lizards has not been widely reported. In this study, treatment groups were orally administered a single-dose of myclobutanil (20mg/kg body weight (bw)). Subsequently, it was found that there were differences in myclobutanil levels between the different tissues and concentrations also changed with degradation time...
August 11, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28806563/alteration-of-the-number-and-percentage-of-innate-immune-cells-in-preschool-children-from-an-e-waste-recycling-area
#3
Yu Zhang, Xijin Xu, Di Sun, Junjun Cao, Yuling Zhang, Xia Huo
Heavy metal lead (Pb) and cadmium (Cd) are widespread environmental contaminants and exert detrimental effects on the immune system. We evaluated the association between Pb/Cd exposures and innate immune cells in children from an electronic waste (e-waste) recycling area. A total number of 294 preschool children were recruited, including 153 children from Guiyu (e-waste exposed group), and 141 from Haojiang (reference group). Pb and Cd levels in peripheral blood were measured by graphite furnace atomic absorption spectrophotometer, NK cell percentages were detected by flow cytometer, and other innate immune cells including monocytes, eosinophils, neutrophils and basophils were immediately measured by automated hematology analyzer...
August 11, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28802142/overexpression-of-ho-1-assisted-pm2-5-induced-apoptosis-failure-and-autophagy-related-cell-necrosis
#4
Wei Zhou, Xiaoyan Yuan, Li Zhang, Baoting Su, Dongdong Tian, Yang Li, Jun Zhao, Yimei Wang, Shuangqing Peng
Severe smog/haze events accompanied by extremely high concentrations of airborne fine particulate matter (PM2.5) have emerged frequently in China and the potential health risks have attracted ever-growing attention. During these episodes, a surge in hospital visits for acute respiratory symptoms and respiratory diseases exacerbation has been reported to be associated with acute exposure to high-levels of particulate matters. To investigate cell fate determination and the underlying pathogenic mechanisms during severe haze episodes or smog events, we exposed human lung epithelial cells (BEAS-2B) to PM2...
August 9, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28802141/adsorption-of-the-herbicides-diquat-and-difenzoquat-on-polyurethane-foam-kinetic-equilibrium-and-computational-studies
#5
Jonas O Vinhal, Kassem K Nege, Mateus R Lage, José Walkimar de M Carneiro, Claudio F Lima, Ricardo J Cassella
This work reports a study about the adsorption of the herbicides diquat and difenzoquat from aqueous medium employing polyurethane foam (PUF) as the adsorbent and sodium dodecylsulfate (SDS) as the counter ion. The adsorption efficiency was shown to be dependent on the concentration of SDS in solution, since the formation of an ion-associate between cationic herbicides (diquat and difenzoquat) and anionic dodecylsulfate is a fundamental step of the process. A computational study was carried out to identify the possible structure of the ion-associates that are formed in solution...
August 9, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28802140/cell-density-dependence-of-microcystis-aeruginosa-responses-to-copper-algaecide-concentrations-implications-for-microcystin-lr-release
#6
Ciera M Kinley, Kyla J Iwinski, Maas Hendrikse, Tyler D Geer, John H Rodgers
Along with mechanistic models, predictions of exposure-response relationships for copper are often derived from laboratory toxicity experiments with standardized experimental exposures and conditions. For predictions of copper toxicity to algae, cell density is a critical factor often overlooked. For pulse exposures of copper-based algaecides in aquatic systems, cell density can significantly influence copper sorbed by the algal population, and consequent responses. A cyanobacterium, Microcystis aeruginosa, was exposed to a copper-based algaecide over a range of cell densities to model the density-dependence of exposures, and effects on microcystin-LR (MC-LR) release...
August 9, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28802139/analysis-of-neurobehavioural-data-by-chemometric-methods-in-ecotoxicological-studies
#7
Cristian Gómez-Canela, Eva Prats, Romà Tauler, Demetrio Raldúa
Incorporation of chemometric tools in behavioural data management workflows allows for the early identification of most relevant endpoints complementarily to statistical confirmatory approaches. In this work, the effects of two model neurotoxicants, chlorpyrifos (CPF) and nicotine, exposures on behavioural profiles of adult zebrafish at three different times (2, 6 and 24h) were evaluated using open field test (OFT) paradigm experiments. Two chemometric methods like Principal Component Analysis (PCA) and Analysis of Variance-Simultaneous Component Analysis (ASCA) have been used to interpret the changes observed in the obtained behavioural data...
August 9, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28800533/deficiency-and-toxicity-of-boron-alterations-in-growth-oxidative-damage-and-uptake-by-citrange-orange-plants
#8
Asad Shah, Xiuwen Wu, Abid Ullah, Shah Fahad, Riaz Muhammad, Lei Yan, Cuncang Jiang
Boron (B) deficiency and toxicity are the major factors that affect plant growth and yield. The present study revealed the effect of B deficiency and toxicity on plant growth, morphology, physiology, and cell structure. A hydroponic culture experiment was conducted with five B levels, B deficient (B0), sufficient (B20, B10, B40) and toxic (B100). Our results show that both B deficient as well as excess level inhibit plant growth. In B deficiency, the major visible symptoms were appeared in roots, while B excess burned the leaf margin of older leaves...
August 8, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28800532/cell-cycle-arrest-mediated-by-cd-induced-dna-damage-in-arabidopsis-root-tips
#9
Weina Cui, Hetong Wang, Jie Song, Xia Cao, Hilary J Rogers, Dennis Francis, Chunyun Jia, Lizong Sun, Meifang Hou, Yuesuo Yang, Peidong Tai, Wan Liu
Accumulating evidence demonstrates that the aberrant expression of cell cycle regulation and DNA repair genes can result in abnormal cell proliferation and genomic instability in eukaryotic cells under different stresses. Herein, Arabidopsis thaliana (Arabidopsis) seedlings were grown hydroponically on 0.5 × MS media containing cadmium (Cd) at 0-2.5mgL(-1) for 5d of treatment. Real time quantitative reverse transcription-polymerase chain reaction (qRT-PCR) analysis revealed that expression of DNA damage repair and cell cycle regulation genes, including BRCA1, MRE11, WEE1, CDKA;1 and PCNA1, showed an inverted U-shaped dose-response...
August 8, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28800531/changes-on-lipid-peroxidation-enzymatic-activities-and-gene-expression-in-planarian-dugesia-japonica-following-exposure-to-perfluorooctanoic-acid
#10
Zuoqing Yuan, Zili Miao, Xiaoning Gong, Baoying Zhao, Yuanyuan Zhang, Hongdou Ma, Jianyong Zhang, Bosheng Zhao
We investigated perfluorooctanoic acid (PFOA)-induced stress response in planarians. We administered different concentrations of PFOA to planarians for up to 10 d. PFOA exposure resulted in significant concentration-dependent elevations in lipid peroxidation, glutathione S-transferase and caspase-3 protease activities, and a significant decline in glutathione peroxidase activities compared with control groups. Exposure to PFOA significantly up-regulated the heat shock proteins hsp70 and hsp90, and p53, and down-regulated hsp40 compared with controls...
August 8, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28800530/comparative-ecotoxicity-of-polystyrene-nanoparticles-in-natural-seawater-and-reconstituted-seawater-using-the-rotifer-brachionus-plicatilis
#11
L Manfra, A Rotini, E Bergami, G Grassi, C Faleri, I Corsi
The impact of nanoplastics using model polystyrene nanoparticles (PS NPs), anionic (PS-COOH) and cationic (PS-NH2), has been investigated on the marine rotifer Brachionus plicatilis, a major component of marine zooplanktonic species. The role of different surface charges in affecting PS NP behaviour and toxicity has been considered in high ionic strength media. To this aim, the selected media were standardized reconstituted seawater (RSW) and natural sea water (NSW), the latter resembling more natural exposure scenarios...
August 8, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28797960/acute-toxic-effects-of-zinc-and-mercury-on-survival-standard-metabolism-and-metal-accumulation-in-juvenile-ridgetail-white-prawn-exopalaemon-carinicauda
#12
Chengsong Zhang, Kuijie Yu, Fuhua Li, Jianhai Xiang
Ridgetail white prawn (Exopalaemon carinicauda) is widely distributed in Chinese coastal zones, especially in the Yellow Sea and Bohai Sea. It is not only considered as an important economic species in China, but also taken as a potential indicator species for the environmental pollution in the estuaries. At present, the responses of this species to environmental toxicants, including trace metal are not well understood. In this study, the acute toxic effects of zinc (Zn) and mercury (Hg) on the survival, oxygen consumption, ammonia-N excretion, and metal accumulation were investigated in the juveniles of E...
August 7, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28787615/ecotoxicological-assessment-of-soils-polluted-with-chemical-waste-from-lindane-production-use-of-bacterial-communities-and-earthworms-as-bioremediation-tools
#13
Selene Muñiz, Pilar Gonzalvo, Ana Valdehita, José Manuel Molina-Molina, José María Navas, Nicolás Olea, Jesús Fernández-Cascán, Enrique Navarro
An ecotoxicological survey of soils that were polluted with wastes from lindane (γ-HCH) production assessed the effects of organochlorine compounds on the metabolism of microbial communities and the toxicity of these compounds to a native earthworm (Allolobophora chlorotica). Furthermore, the bioremediation role of earthworms as facilitators of soil washing and the microbial degradation of these organic pollutants were also studied. Soil samples that presented the highest concentrations of ε-HCH, 2,4,6-trichlorophenol, pentachlorobenzene and γ-HCH were extremely toxic to earthworms in the short term, causing the death of almost half of the population...
August 5, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28787614/beneficial-effects-of-tobacco-biochar-combined-with-mineral-additives-on-im-mobilization-and-bio-availability-of-pb-cd-cu-and-zn-from-pb-zn-smelter-contaminated-soils
#14
Altaf Hussain Lahori, Zengqiang Zhang, Zhanyu Guo, Ronghua Li, Amanullah Mahar, Mukesh Kumar Awasthi, Ping Wang, Feng Shen, Farhana Kumbhar, Tanveer Ali Sial, Junchao Zhao, Di Guo
The efficacy of tobacco biochar (TB) alone and in combined with mineral additives: Ca-hydroxide (CH), Ca-bentonite (CB) and natural zeolite (NZ), on immobilization of Pb, Cd, Cu and Zn, via reduce its (bio) availability to plants were investigated. The soils were collected from Tongguan contaminated (TG-C), Fengxian heavily contaminated (FX-HC) and Fengxian lightly contaminated (FX-LC) fields, Shaanxi province, China. The contaminated top soils were treated with low-cost amendments with an application rate of 1% and cultivated by Chinese cabbage (Brassica campestris L...
August 5, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28783602/organotin-compounds-in-brachidontes-rodriguezii-mussels-from-the-bah%C3%A3-a-blanca-estuary-argentina
#15
Pamela Y Quintas, Andrés H Arias, Ana L Oliva, Claudia E Domini, Mónica B Alvarez, Mariano Garrido, Jorge E Marcovecchio
Levels of tributyltin and its breakdown compounds, including the first record of monobutyltin (MBT) in history for Latin America, were determined in native mussels (Brachidontes rodriguezii) by means of CG-MS, after extraction/derivatization assisted by ultrasound. The samples were collected in 2013 in Bahía Blanca Estuary (Argentina) at 6 sites, which reflect different levels of maritime activities. Total butyltins (TBts = TBT+ DBT+ MBT) levels ranged from 19.64 to 180.57ng Sn g(-1) dry weight. According to the Oslo-Paris commission, the results indicated that 73...
August 4, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28783601/effects-of-water-accommodated-fractions-wafs-of-crude-oil-in-two-congeneric-copepods-tigriopus-sp
#16
Jeonghoon Han, Hui-Su Kim, Il-Chan Kim, Sanghee Kim, Un-Ki Hwang, Jae-Seong Lee
Oil pollution has deleterious effects on marine ecosystems. However, the toxicity of crude oil towards Antarctic marine organisms has not been well studied. We compared the deleterious effects of water accommodated fractions (WAFs) of crude oil on reproduction, intracellular reactive oxygen species (ROS) levels, and antioxidant enzymatic activity in Antarctic (Tigriopus kingsejongensis) and temperate (Tigriopus japonicus) copepods. Reproductive rates of T. kingsejongensis and T. japonicus were significantly reduced (P < 0...
August 4, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28783600/selenium-antagonizes-cadmium-induced-apoptosis-in-chicken-spleen-but-not-involving-nrf2-regulated-antioxidant-response
#17
Menghao Chen, Xiaojing Li, Ruifeng Fan, Changyu Cao, Haidong Yao, Shiwen Xu
The nuclear transcription factor NF-E2-related factor 2 (Nrf2) binds to antioxidant response elements (AREs) and is involved in the regulation of genes participated in defending cells against oxidative damage, which have been confirmed in animal models. Selenium (Se), known as an important element in the regulation of antioxidant activity, can antagonize Cadmium (Cd) toxicity in birds. However, the role of Nrf2 in selenium-cadmium interaction has not been reported in birds. To further explore the mechanism of selenium attenuating spleen toxicity induced by cadmium in chickens, cadmium chloride (CdCl2, 150mg/kg) and sodium selenite (Na2SeO3, 2mg/kg) were co-administrated or individually administered in the diet of chickens for 90 days...
August 4, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28783599/root-endophytic-fungus-piriformospora-indica-affected-growth-cadmium-partitioning-and-chlorophyll-fluorescence-of-sunflower-under-cadmium-toxicity
#18
Saleh Shahabivand, Azar Parvaneh, Ali Asghar Aliloo
Cadmium (Cd) pollution in the soil threatens the quality of environmental health, and deleteriously affects physiological activities of crops. Symbiosis of endophytic fungi with various plants is a promising manner to improving numerous plant characteristics and remediating heavy metal-polluted soils. In this pot experiment, the influence of root endophyte fungus Piriformospora indica on growth, physiological parameters and organs Cd accumulation in sunflower cv. Zaria plants under the toxic levels of Cd (0, 40, 80 and 120mg/kg soil) were studied...
August 4, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28783598/economic-human-and-environmental-health-benefits-of-replacing-formaldehyde-in-the-preservation-of-corpses
#19
Jussara Rocha Ferreira, Lorenna Cardoso Rezende, Abel De Souza Barbosa, Phellip De Carvalho, Natácia Evangelista De Lima, Alexandre Assis Carvalho
Formaldehyde has been prominent in preserving biological tissues since the nineteenth century. Despite being admittedly harmful to health and to the environment, it is still widely used. The Morphology Department of the University of Brasília - Brazil, applied the rethink, reduce, reuse, recycle and responsibility methodology to their activities in an effort to protect the health of laboratory workers and users, save resources and reduce damage to the environment. Here we evaluate the results obtained a decade after the implementation of this proposal (2005-2015)...
August 4, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28781207/testing-of-an-oral-dosing-technique-for-double-crested-cormorants-phalacocorax-auritus-laughing-gulls-leucophaeus-atricilla-homing-pigeons-columba-livia-and-western-sandpipers-calidris-mauri-with-artificially-weather-mc252-oil
#20
K M Dean, D Cacela, M W Carney, F L Cunningham, C Ellis, A R Gerson, C G Guglielmo, K C Hanson-Dorr, K E Harr, K A Healy, K E Horak, J P Isanhart, L V Kennedy, J E Link, I Lipton, A K McFadden, J K Moye, C R Perez, C A Pritsos, K L Pritsos, T Muthumalage, S A Shriner, S J Bursian
Scoping studies were designed to determine if double-crested cormorants (Phalacocorax auritus), laughing gulls (Leucophaues atricilla), homing pigeons (Columba livia) and western sandpipers (Calidris mauri) that were gavaged with a mixture of artificially weathered MC252 oil and food for either a single day or 4-5 consecutive days showed signs of oil toxicity. Where volume allowed, samples were collected for hematology, plasma protein electrophoresis, clinical chemistry and electrolytes, oxidative stress and organ weigh changes...
August 3, 2017: Ecotoxicology and Environmental Safety
journal
journal
27368
1
2
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"