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https://www.readbyqxmd.com/read/29156335/thyroid-disruption-and-reduced-mental-development-in-children-from-an-informal-e-waste-recycling-area-a-mediation-analysis
#1
Lian Liu, Bo Zhang, Kun Lin, Yuling Zhang, Xijin Xu, Xia Huo
This paper aims to evaluate the effects of thyroid disruption on the mental development of children. A total of 258 three-year-old children in Guiyu (e-waste-exposed group) and Nanao (reference group), China were examined. FT3, FT4, TSH, lead (BPb) and cadmium (BCd) in blood were determined, and cognitive and language scores of children were assessed based on the Bayley Scales of Infant Development III. Stepwise multiple regression was used to estimate the relationship between heavy metals and cognitive and language scores; mediation analysis was performed to determine whether thyroid disruption was mechanistically involved...
November 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/29156280/characteristics-and-health-risk-assessment-of-heavy-metals-exposure-via-household-dust-from-urban-area-in-chengdu-china
#2
Zhang Cheng, Liu-Jun Chen, Han-Han Li, Jian-Qing Lin, Zhan-Biao Yang, Yuan-Xiang Yang, Xiao-Xun Xu, Jun-Ren Xian, Ji-Rong Shao, Xue-Mei Zhu
To investigate the characteristics of heavy metals (Cr, Cd, Pb, Zn, Cu and Ni) in household dust in urban household environment of Chengdu, China, 90 household dust samples were collected from 6 districts of the city. The information of houses and residents were also recorded during dust sampling to identify the correlations between heavy metals in household dust and the house attributes. And also the principal component analysis and cluster analysis for sources and impactor factors. The concentrations of Pb (123mg·kg(-1)), Zn (675mg·kg(-1)), Cu (190mg·kg(-1)), Cr (82...
November 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29156271/fresh-and-composted-industrial-sludge-restore-soil-functions-in-surface-soil-of-degraded-agricultural-land
#3
Muhammad Saleem Arif, Muhammad Riaz, Sher Muhammad Shahzad, Tahira Yasmeen, Muhammad Ashraf, Muhammad Siddique, Muhammad Salman Mubarik, Luca Bragazza, Alexandre Buttler
A field study was conducted to test the potential of 5-year consecutive application of fresh industrial sludge (FIS) and composted industrial sludge (CIS) to restore soil functions at surface (0-15cm) and subsurface (15-30cm) of the degraded agricultural land. Sludge amendments increased soil fertility parameters including total organic carbon (TOC), soil available nitrogen (SAN), soil available phosphorus (SAP) and soil available potassium (SAK) at 0-15cm depth. Soil enzyme activities i.e. dehydrogenase (DHA), β-glucosidase (BGA) and alkaline phosphatase (ALp) were significantly enhanced by FIS and CIS amendments in surface soil...
November 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29155567/ratiometric-fluorescent-detection-of-pb-2-by-fret-based-phthalocyanine-porphyrin-dyads
#4
Dongli Zhang, Mengliang Zhu, Luyang Zhao, Jinghui Zhang, Kang Wang, Dongdong Qi, Yang Zhou, Yongzhong Bian, Jianzhuang Jiang
Sensitive and selective detection of Pb(2+) is a very worthwhile endeavor in terms of both human health and environmental protection, as the heavy metal is fairly ubiquitous and highly toxic. In this study, we designed phthalocyanine-porphyrin (Pc-Por) heterodyads, namely, H2Pc-α-ZnPor (1) and H2Pc-β-ZnPor (2), by connecting a zinc(II) porphyrin moiety to the nonperipheral (α) or peripheral (β) position of a metal-free phthalocyanine moiety. Upon excitation at the porphyrin Soret region (420 nm), both of the dyads exhibited not only a porphyrin emission (605 nm) but also a phthalocyanine emission (ca...
November 20, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/29155414/quasiparticles-in-condensed-matter-systems
#5
Peter Woelfle
Quasiparticles are a powerful concept of condensed matter quantum theory. In this review the appearence and the properties of quasiparticles are presented in a unifying perspective. The principles behind the existence of quasiparticle excitations in both quantum disordered and ordered phases of fermionic and bosonic systems are discussed . The lifetime of quasiparticles is considered in particular near a continuous classical or quantum phase transition, when the nature of quasiparticles on both sides of a transition into an ordered state changes...
November 20, 2017: Reports on Progress in Physics
https://www.readbyqxmd.com/read/29155030/transcriptome-analysis-and-discovery-of-genes-involved-in-immune-pathways-from-coelomocytes-of-onchidium-struma-after-bacterial-challenge
#6
Mingming Zhang, Guo Qiao, Qiang Li, De-Hai Xu, Zhitao Qi, Aiming Wang, Mengyao Xu, Jintian Huang
Onchidium struma widely distributes in subtidal and low-tidal zones, which is considered to be an economical species with rich nutrition, a valuable biomonitor for heavy metal pollution and a representative species for evolution from ocean to land. However, there is limited genetic information available for O. struma development. This study compared transcriptomic profiles of coelomocytes from normal and bacteria infected O. struma by Illumina-based paired-end sequencing to explore the molecular immune mechanism of O...
November 15, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29154872/starvation-thermal-and-heavy-metal-associated-expression-of-four-small-heat-shock-protein-genes-in-musca-domestica
#7
Lu Tian, Xiaoyun Wang, Xiaoping Wang, Chaoliang Lei, Fen Zhu
In this study, starvation-, thermal- and heavy metal-associated expression of four small Musca domestica HSPs (abbreviated as MdomHSPs and they are MdomHSP10, MdomHSP27, MdomHSP27.1 and MdomHSP27.2) were determined. The following results were found: All MdomHSPs were significantly higher expressed during the active larval and adult stages than the egg and pupal stages; All MdomHSPs were expressed at relatively equal levels in the head, thorax and abdomen of adults; The expression of MdomHSP27 was significantly down-regulated in 4-day-old larvae that were starved for 6h, while the other 3 MdomHSPs were not significantly affected; Thermal treatment altered the expression of MdomHSPs in 4-day-old larvae: MdomHSP10 was significantly down-regulated in 4-day-old larvae that were maintained at 4°C and 37°C than in those that were maintained at 25°C; Lead, cadmium and chromium exposure influenced larval expression of MdomHSPs to varying degrees...
November 14, 2017: Gene
https://www.readbyqxmd.com/read/29154538/enhanced-removal-of-dissolved-hg-ii-cd-ii-and-au-iii-from-water-by-bacillus-subtilis-bacterial-biomass-containing-an-elevated-concentration-of-sulfhydryl-sites
#8
Qiang Yu, Jeremy B Fein
In this study, the sorption of Hg(II), Cd(II) and Au(III) onto Bacillus subtilis biomass with an elevated concentration of sulfhydryl sites, induced by adding excess glucose to the growth medium (termed 'High Sulfhydryl Bacillus subtilis' or HSBS) was compared to that onto B. subtilis biomass with a low concentration of sulfhydryl sites (termed 'Low Sulfhydryl Bacillus subtilis' or LSBS) and to sorption onto a commercially available cation exchange resin. Our results show that HSBS exhibits sorption capacities for the three studied metals that are two to five times greater than the sorption capacities of LSBS for these metals...
November 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29154140/mouthpart-deformities-in-chironomidae-diptera-as-bioindicators-of-heavy-metals-pollution-in-shiroro-lake-niger-state-nigeria
#9
Francis O Arimoro, Yohanna I Auta, Oghenekaro N Odume, Unique N Keke, Adamu Z Mohammed
In this study, mouthpart deformities in Chironomid larvae (Diptera) were investigated in relation to sediment contamination in the Shiroro Lake in Nigeria. Metals and chironomids were sampled monthly at three stations (A-C) between August 2013 and January 2014. Across the stations, zinc ranged (3.9-75mg/g), manganese (1.29-1.65mg/g), lead (0.00-0.10mg/g), iron (101-168mg/g) and copper (0.13-0.17mg/g). The metal ions did not differ significantly (P > 0.05) between the sampling stations. However, zinc and iron ions were significantly different between the sampling seasons (P < 0...
November 16, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29154097/diversity-abundance-and-persistence-of-antibiotic-resistance-genes-in-various-types-of-animal-manure-following-industrial-composting
#10
Xun Qian, Jie Gu, Wei Sun, Xiao-Juan Wang, Jian-Qiang Su, Robert Stedfeld
Aerobic composting is used widely for animal manure recycling, and it may reduce the amount of antibiotic resistance genes (ARGs) that enter the environment. We sampled three types of animal (bovine, chicken, and pig) manure and the corresponding composts from 12 large-scale farms, and tested multiple ARGs and mobile genetic elements (MGEs) by high-throughput qPCR. A total of 109 ARGs were detected in the manure and compost samples, thereby demonstrating that both are important ARG reservoirs. The diversity and abundance of ARGs were significantly higher in chicken and pig manure than bovine manure, but industrial composting was more efficient at reducing the ARGs in chicken manure than pig and bovine manure...
November 13, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29153863/assessment-of-uranium-release-to-the-environment-from-a-disabled-uranium-mine-in-brazil
#11
Wagner de Souza Pereira, Alphonse Germaine Albert Charles Kelecom, Ademir Xavier da Silva, Alessander Sá do Carmo, Delcy de Azavedo Py Júnior
The Ore Treatment Unit (in Portuguese Unidade de Tratamento de Minérios - UTM) located in Caldas, MG, Brazil is a disabled uranium mine. Environmental conditions generate acid drainage leaching metals and radionuclides from the waste rock pile. This drainage is treated to remove the heavy metals and radionuclides, before allowing the release of the effluent to the environment. To validate the treatment, samples of the released effluents were collected at the interface of the installation with the environment...
November 16, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29153855/changes-in-element-availability-induced-by-sterilization-in-heavy-metal-contaminated-substrates-a-comprehensive-study
#12
Thomas Krauße, Eileen Schütze, René Phieler, David Fürst, Dirk Merten, Georg Büchel, Erika Kothe
Microbiome analyses of soils and microcosm experiments depend on conditions that include sterilization in order to perform experimental manipulation of microbial communities. Still, they should represent conditions close to nature. When using metal contaminated soils, sterilization methods might alter metal availability. Here, four typical metal contaminated substrates were analyzed, representing different contamination histories and soil types. They included two very poor substrates, as they are often found at metal contaminated sites...
November 10, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29153474/impacts-of-environmental-factors-on-the-whole-microbial-communities-in-the-rhizosphere-of-a-metal-tolerant-plant-elsholtzia-haichowensis-sun
#13
Songqiang Deng, Tan Ke, Longtai Li, Shenwen Cai, Yuyue Zhou, Yue Liu, Limin Guo, Lanzhou Chen, Dayi Zhang
Rhizospheric microbes play important roles in plant growth and heavy metals (HMs) transformation, possessing great potential for the successful phytoremediation of environmental pollutants. In the present study, the rhizosphere of Elsholtzia haichowensis Sun was comprehensively studied to uncover the influence of environmental factors (EFs) on the whole microbial communities including bacteria, fungi and archaea, via quantitative polymerase chain reaction (qPCR) and high-throughput sequencing. By analyzing molecular ecological network and multivariate regression trees (MRT), we evaluated the distinct impacts of 37 EFs on soil microbial community...
November 15, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29153329/efficient-removal-of-edta-complexed-cu-ii-by-a-combined-fe-iii-uv-alkaline-precipitation-process-performance-and-role-of-fe-ii
#14
Chao Shan, Zhe Xu, Xiaolin Zhang, You Xu, Guandao Gao, Bingcai Pan
Efficient removal of heavy metal-EDTA complexes from water remains a challenge because of their good solubility and chemical stability. Herein, we employed a proprietary process, i.e., the Fe(III) displacement/UV irradiation/alkaline precipitation (denoted as Fe(III)/UV/OH), to enable an efficient removal of Cu(II)-EDTA complex from 19.2 mg Cu(II)/L to <1 mg Cu(II)/L. The combined process includes Fe(III) replacement with the complexed Cu(II) to form Fe(III)-EDTA and release the free Cu(II), UV-mediated catalytic decarboxylation of EDTA to form amine ligands and reduction of Fe(III) to Fe(II), and the final removal of Cu(II) through precipitation...
October 25, 2017: Chemosphere
https://www.readbyqxmd.com/read/29153291/structural-perturbation-by-arsenic-triggers-the-aggregation-of-hen-egg-white-lysozyme-by-promoting-oligomers-formation
#15
Neelakant Varma, Inderbhan Singh, Mohinder Singh Dahiya, Vijay Kumar Ravi, Satish Kumar
Arsenic trioxide is one of the most common metallic pollutants entering the food chain both by human activities and nature. Its entry inside the living organism through food, air and water results into the accumulation of heavy metal in several tissues which manifest several metabolic or hormonal disorders. Till now the effect of arsenic trioxide on protein misfolding and aggregation culminating into several neurodegenerative disorders is poorly understood. In the present study, we reveal the aggregation process of Hen Egg White Lysozyme (HEWL) in presence of arsenic trioxide (As2O3) at physiological conditions...
November 16, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29153257/pseudomonas-silesiensis-sp-nov-strain-a3-t-isolated-from-a-biological-pesticide-sewage-treatment-plant-and-analysis-of-the-complete-genome-sequence
#16
Michał A Kaminski, Ewa M Furmanczyk, Adam Sobczak, Andrzej Dziembowski, Leszek Lipinski
Microorganisms classified in to the Pseudomonas genus are a ubiquitous bacteria inhabiting variety of environmental niches and have been isolated from soil, sediment, water and different parts of higher organisms (plants and animals). Members of this genus are known for their metabolic versatility and are able to utilize different chemical compounds as a source of carbon, nitrogen or phosphorus, which makes them an interesting microorganism for bioremediation or bio-transformation. Moreover, Pseudomonas sp...
November 3, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/29152462/dietary-intake-of-heavy-metals-from-eight-highly-consumed-species-of-cultured-fish-and-possible-human-health-risk-implications-in-bangladesh
#17
A K M Atique Ullah, M A Maksud, S R Khan, L N Lutfa, Shamshad B Quraishi
Concentrations of five heavy metals (Pb, Cd, Cr, As and Hg) in eight highly consumed cultured fish species (Labeo rohita, Clarias gariepinus, Hypophthalmichthys molitrix, Cyprinus capio, Puntius sarana, Oreochromis mossambicus, Pangasius pangasius and Anabas testudineus) collected from four wholesale markets of Dhaka city, Bangladesh (Karwan Bazar, Mohammadpur Town Hall, Newmarket and Mirpur-1) were measured using atomic absorption spectrometry (AAS) in order to evaluate the potential human health risks from the consumption of fish...
2017: Toxicology Reports
https://www.readbyqxmd.com/read/29151689/reabsorption-of-iron-into-acutely-damaged-rat-liver-a-role-for-ferritins
#18
Ihtzaz Ahmed Malik, Jörg Wilting, Giuliano Ramadori, Naila Naz
AIM: To studied iron metabolism in liver, spleen, and serum after acute liver-damage, in relation to surrogate markers for liver-damage and repair. METHODS: Rats received intraperitoneal injection of the hepatotoxin thioacetamide (TAA), and were sacrificed regularly between 1 and 96 h thereafter. Serum levels of transaminases and iron were measured using conventional laboratory assays. Liver tissue was used for conventional histology, immunohistology, and iron staining...
November 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29151237/health-risk-contamination-of-heavy-metals-in-yolk-and-albumen-of-duck-eggs-collected-in-central-and-western-thailand
#19
P Aendo, R Netvichian, S Tippayalak, A Sanguankiat, T Khuntamoon, T Songserm, P Tulayakul
Two hundred duck egg samples were collected from 20 farms in Central and Western Thailand. The levels of Zn, Co, Mn, Fe, and Cr in yolks were found significantly higher than in albumen, whereas the levels of Cd and Cu contaminations in egg albumen were significantly higher than in yolks. The mean level of Pb contamination in whole eggs was 4.06 ± 2.70 mg kg(-1) dry weight. This level was higher than the Thai agricultural standard no. 6703-2005 for duck eggs set at 0.1 ppm for the magnitude of 40.6 times...
November 18, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/29151186/biochar-effects-on-uptake-of-cadmium-and-lead-by-wheat-in-relation-to-annual-precipitation-a-3-year-field-study
#20
Fengfeng Sui, Jing Zuo, De Chen, Lianqing Li, Genxing Pan, David E Crowley
Biochar has been widely studied for its ability to reduce plant uptake of heavy metals by lowering metal bioavailabilities through adsorption and pH-driven fixation reactions. However, the long-term effect of biochar on heavy metal bioavailabilities in alkaline soils under natural redox condition is rarely studied. Here, we report a study examining the effects of biochar on bioavailability and partitioning of cadmium (Cd) and lead (Pb) among different soil fractions over 3 years in a field study with wheat (Triticum aestivum L...
November 18, 2017: Environmental Science and Pollution Research International
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