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https://www.readbyqxmd.com/read/27924816/an-analysis-of-human-exposure-to-trace-elements-from-deliberate-soil-ingestion-and-associated-health-risks
#1
Veronica M Ngole-Jeme, Georges-Ive E Ekosse, Sandile P Songca
Fifty-seven samples of soils commonly ingested in South Africa, Swaziland, Democratic Republic of Congo (DRC), and Togo were analyzed for the concentrations of arsenic (As), cadmium (Cd), cobalt (Co), chromium (Cr), copper (Cu), lead (Pb), manganese (Mn), nickel (Ni), and zinc (Zn) and their bioaccessibility in the human gastrointestinal tract. Bioaccessibility values were used to calculate daily intake, and hazard quotient of each trace element, and chronic hazard index (CHI) of each sample. Carcinogenic risk associated with As and Ni exposure were also calculated...
December 7, 2016: Journal of Exposure Science & Environmental Epidemiology
https://www.readbyqxmd.com/read/27924119/differential-accumulation-of-cadmium-in-near-isogenic-lines-of-durum-wheat-no-role-for-phytochelatins
#2
Sheila M Macfie, Shirin Bahrami, Brian D McGarvey
Certain cultivars of some crops, including durum wheat (Triticum durum Desf.), have a propensity to accumulate cadmium in the grain. In the 1980s, a Canadian wheat breeding program generated five pairs of near-isogenic lines of durum wheat that vary in cadmium-accumulation. Within each pair, one member accumulates twofold to threefold higher concentrations of cadmium in the shoot and grain. However, the physiological explanation for the high-low phenotype is unknown. We studied correlations between concentrations of cadmium and non-protein thiols, including phytochelatins, in these five pairs of near-isogenic lines to test the hypothesis that differential retention of cadmium-binding complexes in the root would explain the phenotype...
October 2016: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/27922088/analysis-of-four-toxic-metals-in-a-single-rice-seed-by-matrix-solid-phase-dispersion-inductively-coupled-plasma-mass-spectrometry
#3
Xiufen He, Lixia Chen, Xin Chen, Huamei Yu, Lixu Peng, Bingjun Han
Toxic metals in rice pose great risks to human health. Metal bioaccumulation in rice grains is a criterion of breeding. Rice breeding requires a sensitive method to determine metal content in single rice grains to assist the variety selection. In the present study, four toxic metals of arsenic (As), cadmium (Cd), chromium (Cr) and lead (Pb) in a single rice grain were determined by a simple and rapid method. The developed method is based on matrix solid phase dispersion using multi-wall carbon nanotubes (MWCNTs) as dispersing agent and analyzed by inductively coupled plasma mass spectrometry...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27921209/a-novel-fluorescent-quantum-dot-probe-for-the-rapid-diagnostic-high-contrast-imaging-of-tumor-in-mice
#4
M Vibin, R Vinayakan, F B Fernandez, Annie John, Annie Abraham
A simple probe - antibody conjugated silica over coated cadmium selenide quantum dots (QD-Ab probe) for efficient and rapid diagnostic in vivo imaging of tumors is developed. Compared to unconjugated quantum dots (QD), these probes underwent efficient cellular internalization and tumor targeting behavior, retaining bright emission under in vivo cancer models. Silica over coated cadmium selenide quantum dots were conjugated with Epidermal growth factor receptor (EGFR) monoclonal antibody to detect the over expression of EGFR in cancer models...
December 5, 2016: Journal of Fluorescence
https://www.readbyqxmd.com/read/27920921/a-two-dimensional-cd-ii-coordination-polymer-poly-di-aqua-%C3%AE-3-5-6-bis-pyridin-2-yl-pyrazine-2-3-di-carboxyl-ato-%C3%AE%C2%BA-5-o-2-o-3-o-3-n-4-n-5-cadmium
#5
Monserrat Alfonso, Helen Stoeckli-Evans
The reaction of 5,6-bis-(pyridin-2-yl)pyrazine-2,3-di-carb-oxy-lic acid with cadmium dichloride leads to the formation of the title two-dimensional coordination polymer, [Cd(C16H8N4O4)(H2O)2] n . The metal atom is sevenfold coordinated by one pyrazine and one pyridine N atom, two water O atoms, and by two carboxyl-ate O atoms, one of which bridges two Cd(II) atoms to form a Cd2O2 unit situated about a centre of inversion. Hence, the ligand coordinates to the cadmium atom in an N,N',O-tridentate and an O-monodentate manner...
September 1, 2016: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/27920905/an-unprecedented-binuclear-cadmium-di-thio-carbamate-adduct-bis-%C3%AE-2-n-2-hydroxy-eth-yl-n-iso-propyl-carbamodi-thio-ato-%C3%AE%C2%BA-3-s-s-s-bis-n-2-hydroxy-eth-yl-n-iso-propyl-carbamodi-thio-ato-%C3%AE%C2%BA-2-s-s-3-1e-e-2-pyridin-3-yl-methyl-idene-hydrazin-1-yl-idene-meth-yl
#6
Hadi D Arman, Pavel Poplaukhin, Edward R T Tiekink
The asymmetric unit in the title binuclear compound, [Cd(C6H12NOS2)2(C12H10N4)]2·2H2O, comprises a Cd(II) atom, two di-thio-carbamate (dtc) anions, a monodentate 3-pyridine-aldazine ligand and a lattice water mol-ecule. The binuclear mol-ecule is constructed by the application of inversion symmetry. One dtc ligand simultaneously chelates one cadmium atom and bridges the centrosymmetric mate, while the other dtc ligand is chelating only. This leads to a centrosymmetric [Cd(dtc)2]2 core to which are appended two 3-pyridine-aldazine ligands...
September 1, 2016: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/27918943/expression-of-metallothionein-in-the-liver-and-kidneys-of-the-red-deer-cervus-elaphus-l-from-an-industrial-metal-smelting-area-of-poland
#7
Maciej Durkalec, Rafał Kolenda, Tomasz Owczarek, Józef Szkoda, Agnieszka Nawrocka, Jędrzej Grzegrzółka, Piotr Dzięgiel, Piotr Socha, Roman Kołacz, Peter Schierack, Jan Żmudzki, Andrzej Posyniak
The metallothionein 1 (MT1) coding sequence of red deer was identified and compared to orthologous sequences from other mammals. Over 90% identity was observed between red deer MT1 amino acid sequence and MT1 sequences of other ruminants. Liver and kidney samples of red deer were collected from the industrial zinc smelting site of Miasteczko Slaskie and from the Masuria Lake District serving as a pollution-free control site. The concentrations of cadmium (Cd), lead (Pb), copper (Cu) and zinc (Zn) were analyzed by the atomic absorption spectrometry technique (AAS)...
December 2, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27918488/transcriptome-profiling-analysis-of-wolf-spider-pardosa-pseudoannulata-araneae-lycosidae-after-cadmium-exposure
#8
Chang-Chun Li, Yong Wang, Guo-Yuan Li, Yue-Li Yun, Yu-Jun Dai, Jian Chen, Yu Peng
Pardosa pseudoannulata is one of the most common wandering spiders in agricultural fields and a potentially good bioindicator for heavy metal contamination. However, little is known about the mechanisms by which spiders respond to heavy metals at the molecular level. In the present study, high-throughput transcriptome sequencing was employed to characterize the de novo transcriptome of the spiders and to identify differentially expressed genes (DEGs) after cadmium exposure. We obtained 60,489 assembled unigenes, 18,773 of which were annotated in the public databases...
December 3, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27918294/synthesis-and-characterization-of-a-cadmium-ii-organic-supramolecular-coordination-compound-based-on-the-multifunctional-2-amino-5-sulfobenzoic-acid-ligand
#9
Gan Yin Yuan, Lei Zhang, Meng Jie Wang, Kou Lin Zhang
Much attention has been paid by chemists to the construction of supramolecular coordination compounds based on the multifunctional ligand 5-sulfosalicylic acid (H3SSA) due to the structural and biological interest of these compounds. However, no coordination compounds have been reported for the multifunctional amino-substituted sulfobenzoate ligand 2-amino-5-sulfobenzoic acid (H2asba). We expected that H2asba could be a suitable building block for the assembly of supramolecular networks due to its interesting structural characteristics...
December 1, 2016: Acta Crystallographica. Section C, Structural Chemistry
https://www.readbyqxmd.com/read/27916887/cucumber-metallothionein-like-2-csmtl2-exhibits-metal-binding-properties
#10
Yu Pan, Yanglu Pan, Junpeng Zhai, Yan Xiong, Jinhua Li, Xiaobing Du, Chenggang Su, Xingguo Zhang
We identified a novel member of the metallothionein (MT) family, Cucumis sativus metallothionein-like 2 (CsMTL2), by screening a young cucumber fruit complementary DNA (cDNA) library. The CsMTL2 encodes a putative 77-amino acid Class II MT protein that contains two cysteine (Cys)-rich domains separated by a Cys-free spacer region. We found that CsMTL2 expression was regulated by metal stress and was specifically induced by Cd(2+) treatment. We investigated the metal-binding characteristics of CsMTL2 and its possible role in the homeostasis and/or detoxification of metals by heterologous overexpression in Escherichia coli cells...
November 30, 2016: Genes
https://www.readbyqxmd.com/read/27915676/dietary-exposure-to-trace-elements-and-health-risk-assessment-in-the-region-of-valencia-spain-a-total-diet-study
#11
Silvia Marín, Olga Pardo, Rosario Báguena, Guillermina Font, Vicent Yusà
Dietary exposure of the Valencian Region population to lead, cadmium, inorganic arsenic (iAs), chromium, copper, tin and methylmercury (meHg) was assessed in a Total Diet Study carried out in the Region of Valencia in 2010-2011. A total of 8100 food samples were collected and analysed. Occurrence data were combined with consumption data to estimate dietary exposure in adults (>15 years of age) and young children (6-15 years of age). The estimated intake was calculated by a probabilistic approach. Average intake levels (optimistic scenario) for lead, inorganic arsenic (iAs), chromium and tin were 0...
December 5, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27915147/highly-sensitive-optical-interferometric-technique-reveals-stress-dependent-instantaneous-nanometric-growth-fluctuations-of-chinese-chive-leaf-under-heavy-metal-stress
#12
Kokge Thilini Kanchana Muthumali DeSilva, Uma Maheswari Rajagopalan, Hirofumi Kadono
Plant growth apart from being a complex and highly dynamic is dependent on its immediate environment. Leaf expansion measurements using Statistical Interferometry Technique, a sensitive interferometric technique at nanometric accuracy and at sub-second levels revealed the presence of characteristic nanometric intrinsic fluctuations [Plant Biotechnology 31, 195 (2014)]. In this paper, we demonstrate that the nanometric intrinsic fluctuations are sensitive enough that they change under exposure of heavy metals, essential micronutrient zinc and non-essential element cadmium, at relatively low concentrations in the leaves of Chinese chive (Allium tuberosum)...
December 1, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27915146/differential-sensitivity-to-cadmium-of-immunomarkers-measured-in-hemocyte-subpopulations-of-zebra-mussel-dreissena-polymorpha
#13
Lauris Evariste, Damien Rioult, Pauline Brousseau, Alain Geffard, Elise David, Michel Auffret, Michel Fournier, Stéphane Betoulle
Increasing discharge of industrial wastes into the environment results in pollution transfer towards hydrosystems. These activities release heavy metals such as cadmium, known as persistent pollutant that is accumulated by molluscs and exercise immunotoxicological effects. Among molluscs, the zebra mussel, Dreissena polymorpha constitutes a suitable support for freshwater ecotoxicological studies. In molluscs, homeostasis maintain is ensured in part by hemocytes that are composed of several cell populations involved in multiple physiological processes such as cell-mediated immune response or metal metabolism...
December 1, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27914648/atomization-method-for-verifying-size-effects-of-inhalable-particles-on-lung-damage-of-mice
#14
Chen Tao, Yue Tang, Lan Zhang, Yonggang Tian, Yingmei Zhang
To explore the size effects of inhalable particles on lung damage, aqueous aerosol containing cadmium was studied as a model to design a new type of two-stage atomization device that was composed of two adjustable parts with electronic ultrasonic atomization and pneumatic atomization. The working parameters and effectiveness of this device were tested with H2O atomization and CdCl2 inhalation, respectively. By gravimetrically detecting the mass concentrations of PM2.5 and PM10 and analysing the particle size with a laser sensor, we confirmed the particle size distribution of the aqueous aerosol produced by the new device under different working conditions...
December 1, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27912188/bacillus-flexus-strain-as-12-a-new-arsenic-transformer-bacterium-isolated-from-contaminated-water-resources
#15
Mohammad Ahmadi Jebeli, Afshin Maleki, Mohammad Ali Amoozegar, Enayatollah Kalantar, Hassan Izanloo, Fardin Gharibi
A total of 14 arsenic-resistant bacteria were isolated from an arsenic-contaminated travertine spring water in the central district of Qorveh county, Kurdistan Province, Iran. One of strains designated As-12 was selected for further investigation because of its ability to transform arsenic. The strain was identified by cultural, morphological and biochemical tests, and 16S rRNA gene sequencing. Finally, the growth characteristics of the isolate were investigated in a chemically defined medium which included varied ranges of environmental factors such as pH, temperature and salinity...
November 29, 2016: Chemosphere
https://www.readbyqxmd.com/read/27912113/titanium-dioxide-and-cadmium-sulfide-co-sensitized-graphitic-carbon-nitride-nanosheets-composite-photocatalysts-with-superior-performance-in-phenol-degradation-under-visible-light-irradiation
#16
Jinhua Yao, Huan Chen, Fang Jiang, Zhongyi Jiao, Mingchang Jin
In this work, TiO2-CdS-gCNNSs heterojunction photocatalysts were successfully synthesized. CdS was deposited on the surface of gCNNSs via electrostatic attraction; TiOC, TiOCO and TiON bonds were produced in TiO2-CdS-gCNNSs, strengthening the interaction between TiO2 and gCNNSs. The TiO2-CdS-gCNNSs photocatalyst showed excellent photocatalytic activity for phenol degradation under visible-light irradiation, which was higher than that of CdS-gCNNSs, CdS-TiO2 and TiO2-gCNNSs. The improved photocatalytic performance of TiO2-CdS-gCNNSs was ascribed to more adsorption sites, enhanced light harvesting ability and effective separation rate of electron-hole pairs...
November 15, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27910774/comparison-of-the-chemical-composition-and-bioactive-components-of-fruiting-bodies-and-submerged-cultured-mycelia-of-the-willow-bracket-medicinal-mushroom-phellinus-igniarius-agaricomycetes
#17
Huawei Zeng, Wenfeng Wang, Menghua Ma, Guohua Xu, Mei Ying-Jie, Jianfan Sund
Chemical compositions and bioactive ingredients of dried fruiting bodies from Phellinus igniarius (CGMCC no. 50095) (P1) and submerged culture of Ph. igniarius dried mycelia (P2) were investigated in this study. It was found that glutamic acid was regarded as a major amino acid in P1 (1.20%) and was approximately 2.55-fold higher than that in P2 (0.47%). Total amino acids in P1 (5.36%) were slightly higher than in P2 (4.09%). The amounts of iron, zinc, copper, and manganese in P1 were 1.96-3.42 times as high as those in P2, whereas potassium, sodium, and magnesium in P2 were almost 2...
2016: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/27910770/addition-of-zeolites-to-improve-the-functional-characteristics-of-the-hen-of-the-wood-or-maitake-medicinal-mushroom-grifola-frondosa-agaricomycetes
#18
Jovana Vunduk, Anita Klaus, Maja Kozarski, Radovan Dordevic, Zoran Miladinovic, Ljubinko Jovanovic, Miomir Niksic, Leonardus Johannes Lambertus Donatus Van Griensven
Kaolinite and the modified natural zeolite minazel plus (M+) were used as supplements in substrate used for the production of the medicinal mushroom Grifola frondosa. Growth stimulation, expressed as yield and biological efficiency, was observed when M+ (1%) was added. The production cycle was shortened by half as a result of the zeolites' ion-exchange ability, stimulation of enzyme activity, and water retain capacity. Inductively coupled plasma optical emission spectrometry of fruiting bodies showed the absence of heavy metals (arsenic, cadmium, and lead), whereas the concentration of calcium increased greatly and the concentrations of iron, magnesium, and zinc increased moderately under the influence of M+...
2016: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/27910551/x-ray-analysis-of-electron-bernstein-wave-heating-in-mst
#19
A H Seltzman, J K Anderson, A M DuBois, A Almagri, C B Forest
A pulse height analyzing x-ray tomography system has been developed to detect x-rays from electron Bernstein wave heated electrons in the Madison symmetric torus reversed field pinch (RFP). Cadmium zinc telluride detectors are arranged in a parallel beam array with two orthogonal multi-chord detectors that may be used for tomography. In addition a repositionable 16 channel fan beam camera with a 55° field of view is used to augment data collected with the Hard X-ray array. The chord integrated signals identify target emission from RF heated electrons striking a limiter located 12° toroidally away from the RF injection port...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27909925/phosphate-fertilizer-affected-rhizospheric-soils-speciation-of-cadmium-and-phytoremediation-by-chlorophytum-comosum
#20
Youbao Wang, Chengfeng Zhu, Hongfei Yang, Xiaowei Zhang
Experiments were conducted to investigate the effect of phosphate fertilization on chemical speciation of cadmium (Cd) in the rhizospheric soil of Chlorophytum comosum, a potential cadmium hyperaccumulator. The results revealed that when 200 mg kg(-1) phosphate was applied into the soil, the Cd contents in the exchangeable fraction (EXC), carbonate-binding fraction (CA), and Fe-Mn oxides-binding fraction (Fe-Mn) were the highest, and the Cd content in the residual fraction (RES) was the lowest. Phosphate fertilization could enhance Cd conversion from RES into CA and weak RES, thereby improving the bioavailability of Cd and enhancing Cd enrichment and adsorption by C...
December 1, 2016: Environmental Science and Pollution Research International
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