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https://www.readbyqxmd.com/read/29627419/health-risk-assessment-of-heavy-metals-in-freshwater-fish-in-the-central-and-eastern-north-china
#1
Wenjue Zhong, Yanfeng Zhang, Zihao Wu, Rongyan Yang, Xinyue Chen, Jing Yang, Lingyan Zhu
The distribution and potential health risks of eight heavy metals (Copper (Cu), Chromium (Cr), Zinc (Zn), Lead (Pb), Arsenic (As), Cadmium (Cd), Manganese (Mn), Nickel (Ni)) in 16 freshwater systems from central and eastern North China, were investigated. The fish were divided as wild fish, which grew naturally without artificially feeding, and farmed fish. The total concentrations of the eight heavy metals ranged from 82.9 to 226 μg/L in the surface water samples and 3.32-27.6 mg/kg dw in the fish samples...
April 5, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29625396/tolerance-of-ulothrix-sp-lafic-010-chlorophyta-against-high-concentration-of-metals-from-acid-mine-drainage
#2
T F Massocato, J C Ramos, V L F Bascuñan, C Simioni, L R Rörig, J Bonomi Barufi
The production of acid mine drainage of (AMD) is one of the main phenomena responsible for much of the degradation of water and soil resources. Organisms present at sites contaminated by AMD can have the potential to bioaccumulate heavy metals, stimulating their application in bioremediation processes. Ulothrix sp. LAFIC 010 was identified among the species of algae isolated from water contaminated by AMD in the region of Sideropólis (Brazil). The present study evaluated its tolerance and bioaccumulation potential related to zinc, manganese and nickel...
April 3, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29617276/toxicity-thresholds-based-on-edta-extractable-nickel-and-barley-root-elongation-in-chinese-soils
#3
Guangyun Zhu, Bao Jiang, Guohang Yang, Jumei Li, Yibing Ma
The uncertainty in the risk assessment of trace metal elements in soils when total metal contents are used can be decreased by assessing their availability and/or extractability when the soils have a high background value or different sources of trace metal elements. In this study, the added water-soluble nickel (Ni) toxicity to barley root elongation was studied in 17 representative Chinese soil samples with and without artificial rainwater leaching. The extractability of added Ni in soils was estimated by three sequential extractions with ethylenediaminetetraacetic acid (EDTA)...
April 4, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29616314/involvement-of-organic-acids-and-amino-acids-in-ameliorating-ni-ii-toxicity-induced-cell-cycle-dysregulation-in-caulobacter-crescentus-a-metabolomics-analysis
#4
Abhishek Jain, Wei Ning Chen
Nickel (Ni(II)) toxicity is addressed by many different bacteria, but bacterial responses to nickel stress are still unclear. Therefore, we studied the effect of Ni(II) toxicity on cell proliferation of α-proteobacterium Caulobacter crescentus. Next, we showed the mechanism that allows C. crescentus to survive in Ni(II) stress condition. Our results revealed that the growth of C. crescentus is severely affected when the bacterium was exposed to different Ni(II) concentrations, 0.003 mM slightly affected the growth, 0...
April 3, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29594881/potential-application-of-pre-treated-municipal-solid-waste-incineration-fly-ash-as-cement-supplement
#5
Yahaya Yakubu, Jun Zhou, Zhu Shu, Yi Zhang, Wenbin Wang, Yassin Mbululo
Pre-treatment process carried out on raw municipal solid waste incineration (MSWI) fly ash (FA) sample that did not comply initially with the USEPA method 1311 toxicity characteristic leaching procedure (TCLP) regulatory limits of 2011 reduced its chloride and heavy metal content appreciably, thereby making it compliant with the aforementioned regulatory requirement. More than 98% of each heavy metal was successfully removed. The process was excellent in removing cadmium (Cd) (99.99%) and very good at removing the rest...
March 29, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29593817/identification-of-toxic-metals-in-human-embryonic-tissues
#6
Piotr Rzymski, Przemysław Niedzielski, Barbara Poniedziałek, Katarzyna Tomczyk, Paweł Rzymski
Introduction: The cause of a significant number of miscarriages remains unexplained. There is a need to identify the potential role of environmental, dietary and lifestyle factors in the risk of pregnancy loss. The present study was the first to investigate the content of miscarried embryonic material with respect to eight metals (aluminium, cadmium, chromium, copper, manganese, nickel, lead and zinc). Material and methods: Embryonic tissue samples ( n = 20) were obtained from women undergoing misoprostol-induced removal of the embryo between the 6th and 9th week of gestation...
March 2018: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/29574375/characterization-and-health-risk-assessment-of-airborne-pollutants-in-commercial-restaurants-in-northwestern-china-under-a-low-ventilation-condition-in-wintertime
#7
Wenting Dai, Haobin Zhong, Lijuan Li, Junji Cao, Yu Huang, Minxia Shen, Liqin Wang, Jungang Dong, Xuexi Tie, Steven Sai Hang Ho, Kin Fai Ho
Impacts on indoor air quality of dining areas from cooking activities were investigated in eight categories of commercial restaurants including Szechwan Hotpot, Hunan, Shaanxi Noodle, Chinese Barbecue, Chinese Vegetarian, Korean Barbecue, Italian, and Indian, in Northwestern China during December 2011 to January 2012. Chemical characterization and health risk assessment for airborne carbonyls, and particulate-bound polycyclic aromatic hydrocarbons (PAHs) and heavy metals were conducted under low ventilation conditions in wintertime...
March 22, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29574360/acidic-leaching-of-potentially-toxic-metals-cadmium-cobalt-chromium-copper-nickel-lead-and-zinc-from-two-zn-smelting-slag-materials-incubated-in-an-acidic-soil
#8
Taoze Liu, Feili Li, Zhisheng Jin, Yuangen Yang
A column leaching study, coupled with acid deposition simulation, was conducted to investigate the leaching of potentially toxic metals (PTM) from zinc smelting slag materials (SSM) after being incubated in an acid Alfisol for 120 days at room temperature. Two SSMs (SSM-A: acidic, 10 yrs exposure with moderate high PTM concentrations versus SSM-B: alkaline, 2 yrs exposure with extremely high PTM concentrations), were used for the incubation at 0.5, 1, 2.5, 5 wt% amendment ratios in triplicate. Five leaching events were conducted at day 1, 3, 7, 14, and 28, and the leaching of PTMs mainly occurred in the first three leaching events, with the highest PTM concentrations in leachate measured from 5 wt% SSM amendments...
March 22, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29556071/synthesis-of-c-coordinated-o-carboxymethyl-chitosan-metal-complexes-and-evaluation-of-their-antifungal-activity
#9
Weixiang Liu, Yukun Qin, Song Liu, Ronge Xing, Huahua Yu, Xiaolin Chen, Kecheng Li, Pengcheng Li
Based on a condensation reaction, a chitosan-derivative-bearing amino pyridine group was prepared and subsequently followed by coordination with cupric ions, zinc ions and nickel ions to synthesize chitosan metal complexes. The calculations using the density functional theory (DFT) show that the copper ions and nickel ions underwent dsp2 hybridization, the zinc ions underwent sp3 hybridization, and they all formed a coordination bond with the carbon atom in the p-π conjugate group. The antifungal properties of O-CSPX-M against Phytophthora capsici (P...
March 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29550572/interactions-between-chromium-iii-and-iron-iii-molybdenum-iii-or-nickel-ii-cytotoxicity-genotoxicity-and-mutagenicity-studies
#10
Sylwia Terpilowska, Andrzej Krzysztof Siwicki
The aim of this study was to examine the effect of chromium(III) and iron(III) and molybdenum(III) and nickel(II) and their combinations on cyto-, genotoxicity and mutagenicity in BALB/3T3 and HepG2 cells. The results obtained from cytotoxicity assays indicate that there are differences between BALB/3T3 and HepG2 cell lines in their sensitivity to chromium chloride, iron chloride, molybdenum trioxide and nickel chloride. The statistically significant increase of DNA damage of all used microelements in both cell lines was observed...
March 10, 2018: Chemosphere
https://www.readbyqxmd.com/read/29544211/metabolic-responses-of-terrestrial-macrolichens-to-nickel
#11
Jozef Kováčik, Sławomir Dresler, Petr Babula
Short-term (24 h) responses of Cladonia arbuscula subsp. mitis (formerly known as Cladina and this name is used to distinguish the tested species) and Cladonia furcata to nickel (Ni2+ ) excess (10 or 100 μM) were compared. Cladonia accumulated more Ni at higher Ni dose (1.717 mg total Ni/g DW), K amount was unaffected and Ca amount decreased in Cladina only. Fluorescence microscopy detection of total/general ROS and hydrogen peroxide showed Ni-stimulated increase in both species being more pronounced in Cladonia and in mycobiont partner mainly...
March 6, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29542829/multigenerational-effects-of-nickel-on-daphnia-magna-depend-on-temperature-and-the-magnitude-of-the-effect-in-the-first-generation
#12
Cecília M S Pereira, Gert Everaert, Ronny Blust, Karel A C De Schamphelaere
Ecological risk assessment (ERA) is commonly based on single generation ecotoxicological tests that are usually performed at one standard temperature. We investigate the effects of nickel (Ni) on Daphnia magna reproduction at 15, 20 and 25°C along four generations. Multigenerational Ni effects on D. magna reproduction depended on the magnitude of the effect in the first generation (F0) and showed very different patterns at different temperatures. At low effect level concentrations (<EC10 of F0), chronic Ni toxicity at 15 and 20°C did not increase along four generations, and the increase of Ni toxicity at 25°C observed in F1 and F2 in some Ni treatments did not persist into F3, where complete recovery of reproduction was observed...
March 15, 2018: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/29536999/nickel-ii-inhibits-the-oxidation-of-dna-5-methylcytosine-in-mammalian-somatic-cells-and-embryonic-stem-cells
#13
Ruichuan Yin, Jiezhen Mo, Jiayin Dai, Hailin Wang
Nickel is found widely in the environment. It is an essential microelement but also toxic. However, nickel displays only weak genotoxicity and mutagenicity. Exploration of the epigenetic toxicity of nickel is extremely interesting. Iron(ii)- and 2-oxoglutarate-dependent Tet dioxygenases are a class of epigenetic enzymes that catalyze the oxidation of DNA 5-methylcytosine (5mC). Thus, they are critical for DNA demethylation and, importantly, are involved with nuclear reprogramming, embryonic development, and regulation of gene expression...
March 14, 2018: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/29528143/nickel-exposure-induces-persistent-mesenchymal-phenotype-in-human-lung-epithelial-cells-through-epigenetic-activation-of-zeb1
#14
Cynthia C Jose, Lakshmanan Jagannathan, Vinay Singh Tanwar, Xiaoru Zhang, Chongzhi Zang, Suresh Cuddapah
Nickel (Ni) is an environmental and occupational carcinogen, and exposure to Ni is associated with lung and nasal cancers in humans. Furthermore, Ni exposure is implicated in several lung diseases including chronic inflammatory airway diseases, asthma and fibrosis. However, the mutagenic potential of Ni is low and does not correlate with its potent toxicity and carcinogenicity. Therefore, mechanisms underlying Ni exposure-associated diseases remain poorly understood. Since the health risks of environmental exposures often continue post exposure, understanding the exposure effects that persist after the termination of exposure could provide mechanistic insights into diseases...
March 12, 2018: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/29525864/development-of-an-in-vitro-toxicological-test-system-based-on-zebrafish-danio-rerio-sperm-analysis
#15
Tímea Kollár, Eszter Kása, Árpád Ferincz, Béla Urbányi, Zsolt Csenki-Bakos, Ákos Horváth
The effect of seven heavy metals on the motility parameter of zebrafish sperm was tested in order to develop an in vitro toxicological test system as an alternative to live animal testing. In vitro test systems are currently preferred in ecotoxicology due to their practical and ethical advantages and fish sperm can be a suitable model. A number of studies had been carried out previously on this topic, but the described methods had not been standardized in numerous aspects (donor species, measured endpoint, etc...
March 10, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29520558/the-role-of-heavy-metals-and-polychlorinated-biphenyls-pcbs-in-the-oncogenesis-of-head-and-neck-tumors-and-thyroid-diseases-a-pilot-study
#16
V Petrosino, G Motta, G Tenore, M Coletta, A Guariglia, D Testa
Previous literature has highlighted the mechanisms of molecular toxicity induced by substances such as arsenic, cadmium, chromium, nickel, lead, barium and PCBs. The research was carried out on 20 volunteers, all the patients gave their consent to the research: the aim of the study was to evaluate the presence of metals and PCBs in these different matrices (blood and hair), correlating the biochemical data to pathological conditions present, and also to the area in which patients resided. Various quantitative determinations were carried out on samples of blood and hair for 14 heavy metals and on blood samples for 12 PCBs...
March 8, 2018: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/29517777/synthesis-of-a-new-series-of-ni-ii-cu-ii-co-ii-and-pd-ii-complexes-with-an-ons-donor-schiff-base-crystal-structure-dft-study-and-catalytic-investigation-of-palladium-and-nickel-complexes-towards-deacylative-sulfenylation-of-active-methylenes-and-regioselective
#17
Namita Devi, Kuladip Sarma, Rajjakfur Rahaman, Pranjit Barman
A series of Ni(ii), Cu(ii), Co(ii), and Pd(ii) complexes have been synthesized with a chelating Schiff base ligand coordinated to a metal center with ONS donor atoms. The ligand and complexes are characterized by elemental analysis and spectroscopic techniques like FT-IR,1 H-NMR, and UV-Visible spectroscopy. The single crystal structure of the Pd(ii) complex is obtained by X-ray diffraction analysis and exhibits slightly distorted square planar geometry. The structure is optimized by DFT, TD-DFT calculation to elaborate the electronic structure and NBO for the charge distribution analysis of the Pd(ii) complex...
March 8, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29510336/nickel-ii-bis-isatin-thiosemicarbazone-complexes-induced-apoptosis-through-mitochondrial-signaling-pathway-and-g0-g1-cell-cycle-arrest-in-im-9-cells
#18
Chandrasekar Balachandran, Jebiti Haribabu, Kumaramangalam Jeyalakshmi, Nattamai S P Bhuvanesh, Ramasamy Karvembu, Nobuhiko Emi, Suresh Awale
Three novel complexes (1, 3 and 4) ligating N-substituted isatin thiosemicarbazone derivatives have been synthesized and their structural and biological characteristics have been compared with those of the known analogs (2, 5-7 and 8). In addition, the structure of the representative ligands (L1, L3 and L4) and complex (4) was confirmed by single crystal X-ray diffraction method. All the complexes (1-8) were assessed for their cytotoxic property against a panel of four human cancer cells such as HepG-2 (liver), MOLM-14 (acute monocytic leukemia), U937 (histiocytic lymphoma)...
February 24, 2018: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29503730/a-new-triazine-bearing-a-pyrazolone-group-capable-of-copper-nickel-and-zinc-chelation
#19
Akop Yepremyan, Arshad Mehmood, Samantha Brewer, Madalyn M Barnett, Benjamin G Janesko, Giridhar Akkaraju, Eric E Simanek, Kayla N Green
Interests in inorganic applications of triazines is growing. In this report, metal complexes of copper(II), nickel(II), and zinc(II) and a novel class of chelates comprising a triazine ring substituted with a hydrazine group and pyralozone are evaluated using spectrophotometric methods, single crystal X-ray diffractometry, and electrochemistry. Complexes with copper(II) include a single chelate and two chloride atoms to satisfy a trigonal bipryamidal coordination sphere. The nickel(II) and zinc(II) complexes are comprised of two chelating groups that adopt an octahedral geometry around the metal ion...
2018: RSC Advances
https://www.readbyqxmd.com/read/29494971/occurrence-and-risk-assessment-of-potentially-toxic-elements-and-typical-organic-pollutants-in-contaminated-rural-soils
#20
Yongfeng Xu, Shixiang Dai, Ke Meng, Yuting Wang, Wenjie Ren, Ling Zhao, Peter Christie, Ying Teng
The residual levels and risk assessment of several potentially toxic elements (PTEs), phthalate esters (PAEs) and polycyclic aromatic hydrocarbons (PAHs) in rural soils near different types of pollution sources in Tianjin, China, were studied. The soils were found to be polluted to different extents with PTEs, PAEs and PAHs from different pollution sources. The soil concentrations of chromium (Cr), nickel (Ni), di-n-butyl phthalate (DnBP), acenaphthylene (Any) and acenaphthene (Ane) were higher than their corresponding regulatory reference limits...
February 26, 2018: Science of the Total Environment
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