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https://www.readbyqxmd.com/read/28636384/role-of-crystal-structure-and-chalcogenide-redox-properties-on-the-oxidative-assembly-of-cadmium-chalcogenide-nanocrystals
#1
Jessica Davis, Aaron M Chalifoux, Stephanie L Brock
Oxidative assembly of metal chalcogenide nanocrystals (NCs) enables formation of 2-D (dense) and 3-D porous structures without the presence of intervening ligands between particles that can moderate transport properties. This route has been demonstrated successful for a range of single component structures including CdQ, PbQ and ZnQ (Q = S, Se, Te). En route to controllable assembly of multicomponent nanostructures, the roles of Q redox properties (2Q2-  Q22- + 2e), responsible for particle crosslinking, and the native structure (cubic zinc blende vs...
June 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28635628/identification-and-validation-of-reference-genes-for-seashore-paspalum-response-to-abiotic-stresses
#2
Yu Liu, Jun Liu, Lei Xu, Hui Lai, Yu Chen, Zhimin Yang, Bingru Huang
Seashore paspalum (Paspalum vaginatum) is among the most salt- and cadmium-tolerant warm-season perennial grass species widely used as turf or forage. The objective of this study was to select stable reference genes for quantitative real-time polymerase chain reaction (qRT-PCR) analysis of seashore paspalum in response to four abiotic stresses. The stability of 12 potential reference genes was evaluated by four programs (geNorm, NormFinder, BestKeeper, and RefFinder). U2AF combined with glyceraldehyde-3-phosphate dehydrogenase (GAPDH) showed stable expression in Cd-treated leaves and cold-treated roots...
June 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28635264/cadmium-accumulation-risk-in-vegetables-and-rice-in-southern-china-insights-from-solid-solution-partitioning-and-plant-uptake-factor
#3
Yang Yang, Meie Wang, Weiping Chen, Yanling Li, Chi Peng
Solid-solution partitioning coefficient (Kd) and plant uptake factor (PUF) largely determine the solubility and mobility of soil Cd to food crops. A four-year regional investigation was conducted in contaminated vegetable and paddy fields of southern China to quantify the variability in Kd and PUF. The distributions of Kd and PUF characterizing transfers of Cd from soil to vegetable and rice are probabilistic in nature. Dynamics in soil pH and soil Zn greatly affected the variations of Kd. In addition to soil pH, soil organic matter had a major influence on PUF variations in vegetables...
June 21, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28635101/a-simply-synthesized-biphenyl-substituted-piperidin-4-one-for-the-fluorescence-chemosensing-of-cd-2
#4
Sumathi Poomalai, Anju Kannan Padinjareveetil, Sivaraj Ramasamy, Tamil Selvan Govindaraj, Mosae Selvakumar Paulraj, Israel Vijayaraj Muthu Vijayan Enoch
Ion-induced change in fluorescence is a straight-forward method for detection of toxic metal ions showing immediate response. Cadmium ions are toxic to the environment. We report in this paper a piperidine-4-one-based fluorescent chemosensor of Cd(2+) ions, designed and synthesized by a simple method. The compound is characterized using infra-red (IR) and (1) H-NMR spectral techniques. The chemosensor showed Cd(2+) ion selectivity and sensitivity in aqueous solution. The stoichiometry and the binding constants were determined using fluorescence spectroscopy...
June 21, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28634867/a-risk-assessment-study-of-water-quality-biota-and-legacy-sediment-prior-to-small-dam-removal-in-a-tributary-to-the-delaware-river
#5
Megan B Rothenberger, Virginia Hoyt, Dru Germanoski, Maricate Conlon, John Wilson, Joshua Hitchings
The proposed removal of three run-of-river dams (all ≤5-m height) in eastern Pennsylvania along lower Bushkill Creek, a tributary of the Delaware River, has provided a valuable opportunity for multidisciplinary research involving the collection of more than 5 years of pre-removal monitoring data, analysis of heavy metals in legacy sediment cores, and associated toxicity assays to determine the singular and interactive effects of lead, copper, and cadmium on survival and behavior of a common macroinvertebrate found in Bushkill Creek...
July 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28634800/impact-of-chemical-leaching-on-permeability-and-cadmium-removal-from-fine-grained-soils
#6
Zhongbing Lin, Renduo Zhang, Shuang Huang, Kang Wang
The aim of this study was to investigate the influence of chemical leaching on permeability and Cd removal from fine-grained polluted soils. Column leaching experiments were conducted using two types of soils (i.e., artificially Cd-polluted loam and historically polluted silty loam). Chemical agents of CaCl2, FeCl3, citric acid, EDTA, rhamnolipid, and deionized water were used to leach Cd from the soils. Results showed that organic agents reduced permeability of both soils, and FeCl3 reduced permeability of loam soil, compared with inorganic agents and deionized water...
June 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28634792/impairments-of-cadmium-on-vitellogenin-accumulation-in-the-hepatopancreas-of-freshwater-crab-sinopotamon-henanense
#7
Jian Yang, Hui Sun, Yu Qian, Jie Yang
During ovary maturation of crabs, vitellogenin (Vg), a precursor molecule of vitellin (Vn) needed for embryogenesis, can be produced in large quantities in the hepatopancreas and then transported to the ovary by the hemolymph. In the present study, effects of Cd on Vg accumulation in the hepatopancreas and Vg transportation of the freshwater crab Sinopotamon henanense were investigated. We also studied the impacts of Cd on the mRNA expression of genes involved in energy metabolism, protein metabolism, and metallothionein (MT) and glutathione (GSH) synthesis...
June 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28634397/one-pot-hydrothermal-synthesis-of-cds-decorated-cus-microflower-like-structures-for-enhanced-photocatalytic-properties
#8
Xiaolong Deng, Chenggang Wang, Hongcen Yang, Minghui Shao, Shouwei Zhang, Xiao Wang, Meng Ding, Jinzhao Huang, Xijin Xu
CdS decorated CuS structures have been controllably synthesized through a one-pot hydrothermal method. The morphologies and compositions of the as-prepared samples could be concurrently well controlled by simply tuning the amount of CdCl2 and thiourea. Using this strategy, the morphology of the products experienced from messy to flower-like morphologies with multiple porous densities, together with the phase evolution from pure CuS to the CdS/CuS composites. Serving as a photocatalyst, the samples synthesized with the addition of 1 mmol cadmium chloride and 3 mmol thiourea during synthetic process, showed the best photocatalytic activity, which could reach a maximum photocatalytic efficiency of 93% for methyl orange (MO) photodegradation after 150 min...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28633945/assessment-of-heavy-metal-contamination-in-marine-sediments-of-east-coast-of-tamil-nadu-affected-by-different-pollution-sources
#9
N Harikrishnan, R Ravisankar, A Chandrasekaran, M Suresh Gandhi, K V Kanagasabapathy, M V R Prasad, K K Satapathy
The aim of this study was to determine the concentration of heavy metals in the sediments of Periyakalapet to Parangipettai coast, east coast of Tamil Nadu, by using energy-dispersive X-ray fluorescence (EDXRF) technique. The average heavy metal concentrations in the sediment samples were found in the order Al>Fe>Ca>Ti>K>Mg>Mn>Ba>V>Cr>Zn>La>Ni>Pb>Co>Cd>Cu. The average heavy metal concentrations were below the world crustal average. The degree of contamination by heavy metals was evaluated using pollution indices...
June 17, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28633105/effects-of-triacontanol-on-ascorbate-glutathione-cycle-in-brassica-napus-l-exposed-to-cadmium-induced-oxidative-stress
#10
Elham Asadi Karam, Viviana Maresca, Sergio Sorbo, Batool Keramat, Adriana Basile
The ability of exogenous triacontanol (TRIA), a plant growth regulator, to reduce Cd toxicity was studied in canola (Brassica napus L.) plants. The following biological parameters were examined in canola seedlings to investigate TRIA-induced tolerance to Cd toxicity: seedling growth, chlorophyll damage and antioxidant response. In particular, TRIA application reduced Cd-induced oxidative damage, as shown by reduction of ROS content, lipoxygenase (LOX) activity and lipid peroxidation level. TRIA pretreatment increased non-enzymatic antioxidant contents (ascorbate, AsA, glutathione and GSH), phytochelatin content (PCs) and activities of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), guaiacol peroxidase (GPX), monodehydroascorbate reductase (MDHAR), dehydro ascorbate reductase (DHAR), and glutathione reductase (GR), so reducing the oxidative stress...
June 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28632927/prospective-associations-between-environmental-heavy-metal-exposure-and-renal-outcomes-in-adults-with-chronic-kidney-disease
#11
Chun-Chieh Tsai, Chia-Lin Wu, Chew-Teng Kor, Ie-Bin Lian, Chin-Hua Chang, Teng-Hsiang Chang, Chia-Chu Chang, Ping-Fang Chiu
BACKGROUND: In Taiwan, Changhua County residents were exposed to high heavy metal pollution and exhibited high heavy metal levels in blood and urine. We examined associations between heavy metals in residential soil and renal outcomes of residents with chronic kidney disease (CKD). METHOD: From January 01, 2003 to June 30, 2015, we retrospectively identified CKD patients with an estimated glomerular filtration rate of <60 mL/min/1.73 m(2) at one tertiary care center...
June 20, 2017: Nephrology
https://www.readbyqxmd.com/read/28632756/identification-of-atf-7-and-the-insulin-signaling-pathway-in-the-regulation-of-metallothionein-in-c-elegans-suggests-roles-in-aging-and-reactive-oxygen-species
#12
Julie A Hall, Matthew K McElwee, Jonathan H Freedman
It has been proposed that aging results from the lifelong accumulation of intracellular damage via reactions with reactive oxygen species (ROS). Metallothioneins are conserved cysteine-rich proteins that function as efficient ROS scavengers and may affect longevity. To better understand mechanisms controlling metallothionein expression, the regulatory factors and pathways that controlled cadmium-inducible transcription of the C. elegans metallothionein gene, mtl-1, were identified. The transcription factor ATF-7 was identified in both ethylmethanesulfonate mutagenesis and candidate gene screens...
2017: PloS One
https://www.readbyqxmd.com/read/28631335/the-mobile-dso-gene-sso-element-in-rolling-circles-plasmids-of-staphylococci-reflects-the-evolutionary-history-of-its-resistance-gene
#13
Trudy M Wassenaar, Adriana Cabal
The qacC and lnuA genes of Staphylococcus species were recently proposed to comprise a mobile element when residing on rolling-circle plasmids. Here we present other examples of resistance genes on staphylococcal rolling-circle plasmids, including fosB producing resistance to fosfomycin, cat resulting in resistance to chloramphenicol, and cadB for resistance to the toxic heavy metal cadmium. For three of these genes (qacC, lnuA and fosB) evidence was obtained that the genes have spread between different plasmid backgrounds...
June 20, 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/28631031/metals-in-blood-and-eggs-of-green-sea-turtles-chelonia-mydas-from-nesting-colonies-of-the-northern-coast-of-the-sea-of-oman
#14
Mahmood Sinaei, Mehdi Bolouki
The green sea turtle (Chelonia mydas) has been a species of global concern for decades. In this study, heavy metals (mercury: Hg; Cadmium: Cd; Lead: Pb; Copper: Cu; and Zinc: Zn) were measured in blood and three egg fraction of green sea turtles nesting on the northern coast of Sea of Oman. Heavy metals concentrations in blood, yolk, albumen, and egg shell ranged between 0.16-36.78, 0.006-33.88, 0.003-4.02, and 0.002-6.85 μg/g (ww), respectively. According to the results, all heavy metals found in blood samples (n = 12) also were detected in the various parts of the eggs (n = 48)...
June 19, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28629812/benthic-foraminifera-for-heavy-metal-pollution-monitoring-a-case-study-from-burullus-lagoon-of-egypt
#15
O H Orabi, A A El-Badry, A M Badr-ElDin
Sources of heavy metals pollution in the Burullus Lagoon include phosphate fertilizers, sewage and oil spills from fishing boats. The benthic species identified in this lagoon are Adelosina carinata striata (Wiesner), Quinqueloculina bosciana (d'Orbigny), Quinqueloculina seminulum (Linnaeus), Ammonia tepida (Cushman), Elphidium excavatum (Terquem). A. tepida is the most dominant species in the lagoon. It constitutes more than 97% of the total benthic foraminiferal assemblages reflecting tolerance to the very low salinity in the Burullus Lagoon...
June 16, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28628796/evaluation-of-cd-cr-cu-ni-and-pb-in-selected-cosmetic-products-from-jordanian-sudanese-and-syrian-markets
#16
A M Massadeh, M Y El-Khateeb, S M Ibrahim
OBJECTIVES: There is no sufficient data that evaluate heavy metal content in cosmetic products in Jordan as well as Sudan and Syria. This study aims to assess metal levels which include Cadmium (Cd), Chromium (Cr), Copper (Cu), Nickel (Ni), and Lead (Pb) in cosmetic products. These elements have draft limits because they are identified as potential impurities and are known to be toxic. This study aims to provide information to the population that may be beneficial to public health. STUDY DESIGN: Samples were collected from different brands obtained from markets in Jordan, Sudan, and Syria...
June 16, 2017: Public Health
https://www.readbyqxmd.com/read/28626638/transcriptome-of-barley-under-three-different-heavy-metal-stress-reaction
#17
Martina Kintlová, Nicolas Blavet, Radim Cegan, Roman Hobza
In the present study, we used Illumina sequencing technology (HiSeq 2000) to sequence the transcriptome of barley (Hordeum vulgare L., cv. Morex) under three different heavy metal stress conditions: copper, zinc and cadmium. For each of those metals, the concentration causing a 50% inhibitory effect for root growth (EC50) was determined. We sequenced the total RNA of both roots and shoots from barley with and without heavy metal treatments in three replicates. Raw reads of the transcriptome project have been deposited in NCBI's BioProject accession number PRJNA382490...
September 2017: Genomics Data
https://www.readbyqxmd.com/read/28625954/attenuation-of-cadmium-induced-decline-in-spatial-habituation-and-recognition-memory-by-long-term-administration-of-almond-and-walnut-supplementation-role-of-cholinergic-function
#18
Zehra Batool, Faiza Agha, Saara Ahmad, Laraib Liaquat, Saiqa Tabassum, Saima Khaliq, Lubna Anis, Irfan Sajid, Shaista Emad, Tahira Perveen, Saida Haider
Excessive exposure of cadmium which is regarded as a neurotoxin can stimulate aging process by inducing abnormality in neuronal function. It has been reported that supplementation of almond and walnut attenuate age-related memory loss. Present study was designed to investigate the weekly administration of cadmium for one month on learning and memory function with relation to cholinergic activity. Cadmium was administered at the dose of 50 mg/kg/week. Whereas, almond and walnut was supplemented at the dose of 400 mg/kg/day along with cadmium administration to separate set of rats...
January 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28624948/metal-release-from-contaminated-leaf-litter-and-leachate-toxicity-for-the-freshwater-crustacean-gammarus-fossarum
#19
Florence Maunoury-Danger, Vincent Felten, Clément Bojic, Fabrice Fraysse, Mar Cosin Ponce, Odile Dedourge-Geffard, Alain Geffard, François Guérold, Michael Danger
Industrialization has left large surfaces of contaminated soils, which may act as a source of pollution for contiguous ecosystems, either terrestrial or aquatic. When polluted sites are recolonized by plants, dispersion of leaf litter might represent a non-negligible source of contaminants, especially metals. To evaluate the risks associated to contaminated leaf litter dispersion in aquatic ecosystems, we first measured the dynamics of metal loss from leaf litter during a 48-h experimental leaching. We used aspen (Populus tremula L...
June 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28624942/toxicity-of-56-substances-to-trees
#20
Lauge Peter Westergaard Clausen, Stefan Trapp
Toxicity data of substances to higher plants is needed for the purpose of risk assessment, site evaluation, phytoremediation, and plant protection. However, the results from the most common phytotoxicity tests, like the OECD algae and Lemna test, are not necessarily valid for higher terrestrial plants. The willow tree toxicity test uses inhibition of transpiration (aside of growth and water use efficiency) of willow cuttings grown in spiked solutions or soils as end point to quantify toxicity. This overview presents results from 60 studies including 24 new unpublished experiments for 56 different chemicals or substrates...
June 17, 2017: Environmental Science and Pollution Research International
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