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Ecotoxicology and Environmental Safety

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https://www.readbyqxmd.com/read/29783112/the-neuropeptides-of-asian-freshwater-clam-corbicula-fluminea-as-new-molecular-biomarker-basing-on-the-responses-of-organophosphate-chemicals-exposure
#1
Qi Wang, Xiangsheng Hong, Huihui Chen, Lilai Yuan, Jinmiao Zha
In the present study, to discover new biomarker of Asian freshwater clam (Corbicula fluminea) to assess impact of environmental pollutions, cholecystokinin (CCK), conopressin, and Neuropeptide FF (FFamide) in C. fluminea were selected as potent biomarkers. Therefore, their full-length cDNAs were cloned and characterized to investigate the molecular characteristics and expression patterns of neuropeptides in C. fluminea. According to the sequence analysis, CCK, conopressin, and FFamide encoded proteins of 173, 152, and 90 amino acids, respectively...
May 18, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29783111/polymeric-nanocomposites-for-the-removal-of-acid-red-52-dye-from-aqueous-solutions-synthesis-characterization-kinetic-and-isotherm-studies
#2
A Gouthaman, Raja S Azarudeen, A Gnanaprakasam, V M Sivakumar, M Thirumarimurugan
Polymeric nanocomposites polyaniline-polyvinylpyrrolidone (PAPV) and polyaniline-polyvinylpyrrolidone-neodymium/zinc oxide (PAPV-NZO) were synthesized for the effective dye removal through adsorption process. Neodymium doped zinc oxide (NZO) with various proportions of neodymium were prepared by chemical co-precipitation method and incorporated into the copolymer matrix via oxidative polymerization technique. NZO nanoparticles were characterized by X-ray diffraction (XRD) and the morphological features, and functional group linkages of the PAPV-NZO were confirmed by scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR) analyses...
May 18, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29783110/temporal-and-spatial-variation-in-the-mechanisms-used-by-microorganisms-to-form-methylmercury-in-the-water-column-of-changshou-lake
#3
Zhilin Xing, Tiantao Zhao, Weiyang Bai, Xu Yang, Shuai Liu, Lijie Zhang
The microbiome in artificial lake water and its impact on mercury (Hg) methylation remain largely unknown. We selected the largest artificial lake in southeastern china, Changshou Lake (CSL), which has high background levels of Hg, for our investigation of Hg transformation microorganisms. Five different sections of the water column of CSL were sampled during four seasons. The water samples were subjected to analysis of geochemical parameters, various Hg species and microbiome information. High concentrations of total mercury (THg) were detected in CSL in comparison with those found in natural lakes...
May 18, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29783109/anti-inflammatory-potential-of-alginic-acid-from-sargassum-horneri-against-urban-aerosol-induced-inflammatory-responses-in-keratinocytes-and-macrophages
#4
I P Shanura Fernando, Thilina U Jayawardena, K K Asanka Sanjeewa, Lei Wang, You-Jin Jeon, Won Woo Lee
The airborne particulate pollutants originating in the deserts of Mongolia and China which becomes contaminated with industrial effluents and traffic emissions while moving with the wind currents towards East Asia has recently become a serious environmental and health issue in the region. They cause asthma, collateral lung tissue damage, oxidative stress, allergic reactions, and inflammation. The current study was undertaken to evaluate the protective effects of alginate extracted from the invasive alga Sargassum horneri (SHA) against fine dust collected from Beijing, China (Chinese fine dust; CFD)...
May 18, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29783108/a-new-perspective-to-aberrations-caused-by-barium-and-vanadium-ions-on-lens-culinaris-medik
#5
Murat Çanlı
This study investigates aberrations caused by barium and vanadium on meristematic cells of Lens culinaris Medik. Barium and vanadium ions at various concentrations (0.05 M, 0.1 M, 0.25 M, 0.5 M, and 1.0 M) were exposed to the seeds of the plant at fixed time interval (12 h). After seedlings, with a microscopic examination images were captured about the root tips. Those images showed that several abnormalities occurred on the plant such as chromosome breakings, chromosome dispersion, bridge chromosome, chromosome adherence, ring chromosome...
May 18, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29783107/effect-of-cd-on-growth-physiological-response-cd-subcellular-distribution-and-chemical-forms-of-koelreuteria-paniculata
#6
Lan Peng Yang, Jian Zhu, Ping Wang, Jing Zeng, Rong Tan, Yu Zhong Yang, Zhi Ming Liu
Koelreuteria paniculata were cultivated in nutrient solution with different concentrations of Cd (0, 50, 150, 250 and 500 µM) and sampled after 90 days. The resistance, translocation, accumulation and stress responses in Koelreuteria paniculata were investigated by hydroponic experiments. The results showed that Koelreuteria paniculata is an efficient Cd excluder that can tolerate high concentrations of Cd (up to 150-250 µM of Cd). The concentration of Cd never exceeds 5 ppm in leaves and 10 ppm in roots...
May 18, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29783106/prediction-of-the-combined-effects-of-multiple-estrogenic-chemicals-on-mcf-7-human-breast-cancer-cells-and-a-preliminary-molecular-exploration-of-the-estrogenic-proliferative-effects-and-related-gene-expression
#7
Shengwu Yuan, Chao Huang, Xiaoya Ji, Mei Ma, Kaifeng Rao, Zijian Wang
The environmental risks of environmental estrogens (EEs) are often assessed via the same mode of action in the concentration addition (CA) model, neglecting the complex combined mechanisms at the genetic level. In this study, the cell proliferation effects of estrone, 17α-ethinylestradiol, 17β-estradiol, estriol, diethylstilbestrol, estradiol valerate, bisphenol A, 4-tert-octylphenol and 4-nonylphenol were determined individually using the CCK-8 method, and the proliferation effects of a multicomponent mixture of estrogenic chemicals mixed at equipotent concentrations using a fixed-ratio design were studied using estrogen-sensitive MCF-7 cells...
May 18, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29778984/the-role-of-cuzn-and-mn-superoxide-dismutases-in-earthworm-eisenia-andrei-kept-in-two-distinct-field-contaminated-soils
#8
Radka Roubalová, Jiří Dvořák, Petra Procházková, František Škanta, Isabel Navarro Pacheco Natividad, Jaroslav Semerád, Tomáš Cajthaml, Martin Bilej
Polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs), together with polycyclic aromatic hydrocarbons (PAHs), represent highly toxic and persistent organic environmental pollutants, especially due to their capability for bioaccumulation in fatty tissues. To observe the environmentally relevant effect of these compounds on earthworms, two soils naturally contaminated with PCDD/Fs and PAHs were used in our experiments. We focused on the role of CuZn- and Mn-superoxide dismutases. We assembled a full-length sequences of these molecules from Eisenia andrei earthworm and confirmed their activity...
May 17, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29778047/source-identification-and-spatial-distribution-of-arsenic-and-heavy-metals-in-agricultural-soil-around-hunan-industrial-estate-by-positive-matrix-factorization-model-principle-components-analysis-and-geo-statistical-analysis
#9
Xiaowen Zhang, Shuai Wei, Qianqian Sun, Syed Abdul Wadood, Boli Guo
Characterizing the distribution and defining potential sources of arsenic and heavy metals are the basic preconditions for reducing the contamination of heavy metals and metalloids. 71 topsoil samples and 61 subsoil samples were collected by grid method to measure the concentration of cadmium (Cd), arsenic (As), lead (Pb), copper (Cu), zinc (Zn), nickel (Ni) and chromium (Cr). Principle components analysis (PCA), GIS-based geo-statistical methods and Positive Matrix Factorization (PMF) were applied. The results showed that the mean concentrations were 9...
May 16, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29775830/characterization-of-metals-in-indoor-dusts-from-electronic-workshops-cybercaf%C3%A3-s-and-offices-in-southern-nigeria-implications-for-on-site-human-exposure
#10
Chukwujindu M A Iwegbue, Grace Obi, Onoriode O Emoyan, Eze W Odali, Francis E Egobueze, Godswill O Tesi, Godwin E Nwajei, Bice S Martincigh
The levels of Cd, Pb, Cr, Ni, Cu, Co, Ba, Mn, Zn, Al and Fe were evaluated in indoor dusts from electronic workshops, cybercafés and offices in southern Nigeria. The study was aimed at providing information on the distribution patterns, and the associated risks that may arise from exposure of humans to these metals in indoor dusts from the three work environments. The dust samples were digested with aqua-regia and analyzed for the metal concentrations by inductively coupled plasma-atomic emission spectrometry (ICP-AES)...
May 15, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29775829/synthesis-of-mesoporous-triple-metal-nanosorbent-from-layered-double-hydroxide-as-an-efficient-new-sorbent-for-removal-of-dye-from-water-and-wastewater
#11
Miloš Kostić, Miljana Radović, Nena Velinov, Slobodan Najdanović, Danijela Bojić, Andrew Hurt, Aleksandar Bojić
In this study, co-precipitation synthesis of the mesoporous triple-metal nanosorbent from Fe, Cu, Ni layered double hydroxide (FeCuNi-LDH), on the basis of the data obtained from the TG analysis was carried out. The FTIR spectroscopy and XRD results confirm the formation of CuO, NiO and Fe2 O3 nanoparticles, while the EDX analysis does not show significant variations on the surface in elemental composition. BET analysis shows that FeCuNi-280 (FeCuNi-LDH calcinated at 280 °C) with mesoporous structure, has larger surface area compared to FeCuNi-LDH and FeCuNi-550 (FeCuNi-LDH calcinated at 550 °C)...
May 15, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29775828/size-season-and-origin-of-gastropods-matter-in-imposex-assessments
#12
Martina Rossato, Mércia Barcelos Costa, Ítalo Braga de Castro, Grasiela Lopes Leães Pinho
Through controlled exposure to tributyltin (TBT), the effects of season, size, and population origin were evaluated on imposex incidence in Stramonita brasiliensis. Four experiments were carried out with organisms collected from three different sites on the Brazilian coast (Torres - Rio Grande do Sul, Farol de Santa Marta - Santa Catarina, and Aracruz - Espírito Santo). S. brasiliensis were anesthetized, sexed, measured, classified by size in small (< 30 mm), medium (≥ 30 to ≤ 40 mm), or big (> 40 mm) and injected in the foot muscle with 0...
May 15, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29775827/responses-of-atrazine-degradation-and-native-bacterial-community-in-soil-to-arthrobacter-sp-strain-hb-5
#13
Jianpeng Gao, Peipei Song, Guanying Wang, Jinhua Wang, Lusheng Zhu, Jun Wang
The bioremediation of soil contaminated with organic pesticides is a safe and effective approach to remove pollutants from the soil. However, whether the invasion of foreign aid organisms affects the local organisms has received increasing attention in recent years. Therefore, the purpose of this study was to examine the degradation ability of atrazine by the strain HB-5 and evaluate its effects on natural bacterial communities in a miniature pot experiment. Results showed that HB-5 accelerated the degradation of atrazine and the degradation half-life of atrazine was 3...
May 15, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29772463/bioremediation-of-organophosphorus-pesticide-phorate-in-soil-by-microbial-consortia
#14
Monu Jariyal, Vikas Jindal, Kousik Mandal, Virash Kamal Gupta, Balwinder Singh
Microbial consortia isolated from aged phorate contaminated soil were used to degrade phorate. The consortia of three microorganisms (Brevibacterium frigoritolerans, Bacillus aerophilus and Pseudomonas fulva) could degrade phorate, and the highest phorate removal (between 97.65 and 98.31%) was found in soils inoculated with mixed cultures of all the three bacterial species. However, the mixed activity of any of two of these bacteria was lower than mixed consortia of all the three bacterial species. The highest degradation by individual mixed consortia of (B...
May 14, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29772462/photocatalytic-mineralization-and-degradation-kinetics-of-sulphamethoxazole-and-reactive-red-194-over-silver-zirconium-co-doped-titanium-dioxide-reaction-mechanisms-and-phytotoxicity-assessment
#15
Saraschandra Naraginti, Yi Li, Gianluca Li Puma
The photodegradation and phytotoxicity of the pharmaceutical antibiotic, sulphamethoxazole (SMX) and the azo-dye reactive-red-194 (RR194) under visible-light irradiation of TiO2 nanoparticles modified by silver and zirconium was investigated. The results indicated that sulphamethoxazole and its toxic degradation by product, 3-amino-5-methylisoxazole and RR-194 could be degraded efficiently by the co-doped Zr/Ag-TiO2 catalyst. PL studies and ROS generation results suggested that the effective charge separation was carried out while irradiation of the modified TiO2 nanoparticles...
May 14, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29763811/current-status-and-environment-impact-of-direct-straw-return-in-china-s-cropland-a-review
#16
REVIEW
Hui Li, Mingwei Dai, Shunli Dai, Xinju Dong
With the development of grain production technologies and improvement of rural living standard, the production and utilization of straw have significantly been changed in China. More than 1 billion tones of straw are produced per year, and vast amount of them are discarded without effective utilization, leading various environmental and social impacts. Straw return is an effective approach of the straw utilization that has been greatly recommended by government and scientists in China. This paper discussed the current status of the straw return in China...
May 12, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29758510/assessing-the-chronic-toxicity-of-nickel-to-a-tropical-marine-gastropod-and-two-crustaceans
#17
Francesca Gissi, Jenny L Stauber, Monique T Binet, Melanie A Trenfield, Joost W Van Dam, Dianne F Jolley
The mining and processing of nickel ores from tropical regions contributes 40% of the global supply. The potential impact of these activities on tropical marine ecosystems is poorly understood. Due to the lack of ecotoxicity data for tropical marine species, there is currently no available water quality guideline value for nickel that is specific to tropical species. In this study, we investigated the toxicity of nickel to three tropical marine invertebrates, the gastropod Nassarius dorsatus, the barnacle Amphibalanus amphitrite, and the copepod Acartia sinjiensis...
May 11, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29758509/potential-health-risks-via-consumption-of-six-edible-shellfish-species-collected-from-piura-peru
#18
I Loaiza, M De Troch, G De Boeck
Scallops and their potential predators were collected in Sechura Bay and in front of the Illescas Reserved Zone (north Peru), during El Niño-Southern Oscillation (ENSO) 2016, and analyzed for the metals chromium (Cr), manganese (Mn), iron (Fe), nickel (Ni), copper (Cu), zinc (Zn), arsenic (As), cadmium (Cd) and lead (Pb). This study showed that ~20% of the molluscs exceeded the maximum residual levels (MRLs) for human consumption in inorganic As, while ~30% of the crustaceans did. For Cd, around 10% and 40% of the molluscs and the crustaceans were above the MRLs, respectively...
May 11, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29753828/physiological-ultrastructural-biochemical-and-molecular-responses-of-young-cocoa-plants-to-the-toxicity-of-cr-iii-in-soil
#19
Junea Leandro do Nascimento, Alex-Alan Furtado de Almeida, Joedson P Barroso, Pedro A O Mangabeira, Dário Ahnert, Artur G R Sousa, José Vitor S Silva, Virupax C Baligar
The objective of this study was to evaluate Cr toxicity in young plants of the CCN 51 Theobroma cacao genotype at different concentrations of Cr3+ in the soil (0, 100, 200, 400 and 600 mg kg-1 ) through physiological, ultrastructural, antioxidant and molecular changes. Doses of 400 and 600 mg Cr3+ kg-1 soil severely affected foliar gas exchange, promoted by damages in photosynthetic machinery evidenced by the decrease in CO2 fixation. Decreased expression of psbA and psbO genes, changes in enzymatic activity and lipid peroxidation also affected leaf gas exchange...
May 10, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29753827/reduction-of-arsenic-toxicity-in-two-rice-cultivar-seedlings-by-different-nanoparticles
#20
Qing Huang, Qing Liu, Lina Lin, Fang-Jun Li, Yifan Han, Zheng-Guo Song
In this study, we investigated arsenic uptake and enzymatic activities in rice seedlings after the addition of nanoparticles. Hydroponic experiments were conducted to investigate the effects of different nanomaterials (high-quality graphene oxide, multilayer graphene oxide, 20 nm hydroxyapatite (HA20 ), 40 nm hydroxyapatite (HA40 ), nano-Fe3 O4 (nFe3 O4 ) and nano-zerovalent iron [nFe]) on the biomass, arsenic uptake, and enzyme activities in seedlings of the rice cultivars T705 and X24. Compared with the control, the addition of different nanomaterials increased seedling growth, with X24 rice growing better than T705 rice...
May 10, 2018: Ecotoxicology and Environmental Safety
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