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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
#1
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/27920692/effects-of-arsenic-trioxide-on-minor-progressive-high-grade-osteosarcoma-of-the-extremities-metastatic-to-the-lung-results-of-39-patients-treated-in-a-single-institution
#2
Lu Xie, Wei Guo, Xiaodong Tang, Yi Yang, Jie Xu
Patients who mildly progressed after first-line chemotherapy were administered arsenic trioxide (ATO) 5-10 mg intravenously daily. Thirty-nine patients were finally enrolled in the study, of whom 19 patients received first-line chemotherapy with ATO infusion while 20 patients did not. Progression-free survival at 4 months was 89.2 and 62.7% (p = 0.043) for the ATO group and the control group, respectively, while the 2-year overall survival was 61 and 16.4% (p = 0.032).
September 2016: Case Reports in Oncology
https://www.readbyqxmd.com/read/27919144/-manfredonia-southern-italy-a-continuous-catastrophe-newfound-citizenship-and-removal
#3
Giulia Malavasi
This article concerns the history of Manfredonia (Apulia Region, Southern Italy), linked to the petrochemical industry owned by Eni (from 1960s to 1990s). The city suffered not only an important accident occurred in 1976 with arsenic dissemination, but also a continuous catastrophe. In the 1980s, the popular movement contributed to an improved citizenship, but also to rifts and conflicts. The petrochemical impact on community determined disruption in domestic and social relationships, divided memory, and removal...
November 2016: Epidemiologia e Prevenzione
https://www.readbyqxmd.com/read/27918996/arsenic-removal-from-water-by-coupling-photocatalysis-and-complexation-ultrafiltration-processes-a-preliminary-study
#4
R Molinari, P Argurio
Inorganic As removal from contaminated water has been studied by off-line coupling of photocatalysis and complexation-ultrafiltration (CP-UF), showing that this combination permits to obtain a quite complete arsenic removal from the treated water. Two commercial polymers, poly(dimethylamine-coepichlorohydrin-coethylenediamine) (PDEHED) and poly(diallyl dimethyl amnmonium chloride) (PolyDADMAC) have been tested in the CP-UF process. The operating conditions (pH and polymer/As weight ratio) for As(V) complexation were determined finding values of 7...
November 27, 2016: Water Research
https://www.readbyqxmd.com/read/27918984/hypertension-among-adults-exposed-to-drinking-water-arsenic-in-northern-chile
#5
Emily M Hall, Johanna Acevedo, Francisca González López, Sandra Cortés, Catterina Ferreccio, Allan H Smith, Craig M Steinmaus
BACKGROUND: A growing number of studies have identified an association between exposure to inorganic arsenic and hypertension. However, results have not been consistent across studies. Additional studies are warranted, given the global prevalence of both arsenic exposure and morbidity attributable to hypertension. METHODS: We analyzed data collected from October 2007-December 2010 for a population-based cancer case-control study in northern Chile. Data included lifetime individual arsenic exposure estimates and information on potential confounders for a total of 1266 subjects...
December 2, 2016: Environmental Research
https://www.readbyqxmd.com/read/27918114/confined-metastable-2-line-ferrihydrite-for-affordable-point-of-use-arsenic-free-drinking-water
#6
Avula Anil Kumar, Anirban Som, Paolo Longo, Chennu Sudhakar, Radha Gobinda Bhuin, Soujit Sen Gupta, Anshup, Mohan Udhaya Sankar, Amrita Chaudhary, Ramesh Kumar, Thalappil Pradeep
Arsenic-free drinking water, independent of electrical power and piped water supply, is possible only through advanced and affordable materials with large uptake capacities. Confined metastable 2-line ferrihydrite, stable at ambient temperature, shows continuous arsenic uptake in the presence of other complex species in natural drinking water and an affordable water purification device has been made using the same.
December 5, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27917165/the-chromobacterium-violaceum-arsr-arsenite-repressor-exerts-tighter-control-on-its-cognate-promoter-than-the-escherichia-coli-system
#7
Letícia M Arruda, Lummy M O Monteiro, Rafael Silva-Rocha
Environmental bacteria are endowed with several regulatory systems that have potential applications in biotechnology. In this report, we characterize the arsenic biosensing features of the ars response system from Chromobacterium violaceum in the heterologous host Escherichia coli. We show that the native Pars/arsR system of C. violaceum outperforms the chromosomal ars copy of E. coli when exposed to micromolar concentrations of arsenite. To understand the molecular basis of this phenomenon, we analyzed the interaction between ArsR regulators and their promoter target sites as well as induction of the system at saturating concentrations of the regulators...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27916305/microbial-communities-involved-in-arsenic-mobilization-and-release-from-the-deep-sediments-into-groundwater-in-jianghan-plain-central-china
#8
Xiaoming Chen, Xian-Chun Zeng, Jianing Wang, Yamin Deng, Teng Ma, Guoji E, Yao Mu, Ye Yang, Hao Li, Yanxin Wang
It was shown that groundwater in Jianghan Plain was severely contaminated by arsenic; however, little is known about the mechanism by which the mineral arsenic was mobilized and released into groundwater from the high-arsenic sediments in this area. Here, we collected sediment samples from the depths of 5-230m in Jianghan Plain. Although all of the samples contain high contents of total arsenic, the soluble arsenic was only detectable in few of the shallow sediments, but was readily detectable in all of the deep sediments at the depths of 190-230m...
December 1, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27916260/arsenic-solid-phase-speciation-and-reversible-binding-in-long-term-contaminated-soils
#9
M S Rahman, M W Clark, L H Yee, M J Comarmond, T E Payne, P Kappen, L Mokhber-Shahin
Historic arsenic contamination of soils occurs throughout the world from mining, industrial and agricultural activities. In Australia, the control of cattle ticks using arsenicals from the late 19th to mid 20th century has led to some 1600 contaminated sites in northern New South Wales. The effect of aging in As-mobility in two dip-site soil types, ferralitic and sandy soils, are investigated utilizing isotopic exchange techniques, and synchrotron X-ray adsorption spectroscopy (XAS). Findings show that historic soil arsenic is highly bound to the soils with >90% irreversibly bound...
December 1, 2016: Chemosphere
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
#10
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/27914647/human-exposure-to-dietary-inorganic-arsenic-and-other-arsenic-species-state-of-knowledge-gaps-and-uncertainties
#11
Francesco Cubadda, Brian P Jackson, Kathryn L Cottingham, Yoshira Ornelas Van Horne, Margaret Kurzius-Spencer
Inorganic arsenic (iAs) is ubiquitous in the environment as arsenite (AsIII) and arsenate (AsV) compounds and biotransformation of these toxic chemicals leads to the extraordinary variety of organoarsenic species found in nature. Despite classification as a human carcinogen based on data from populations exposed through contaminated drinking water, only recently has a need for regulatory limits on iAs in food been recognized. The delay was due to the difficulty in risk assessment of dietary iAs, which critically relies on speciation analysis providing occurrence data for iAs in food - and not simply for total arsenic...
November 30, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27913908/erratum-to-quantitative-assessment-of-possible-human-health-risk-associated-with-consumption-of-arsenic-contaminated-groundwater-and-wheat-grains-from-ropar-wetland-and-its-environs
#12
Sakshi Sharma, Jagdeep Kaur, Avinash Kaur Nagpal, Inderpreet Kaur
No abstract text is available yet for this article.
December 2016: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27913456/acute-promyelocytic-leukemia-preventing-early-complications-and-late-toxicities
#13
Sameem Abedin, Jessica K Altman
Acute promyelocytic leukemia (APL) is a unique subtype of acute myeloid leukemia (AML), which presents with a distinct coagulopathy. Therapeutic advances have made APL one of the true success stories in oncology, transforming this once lethal disease into the most curable form of AML. For many patients, cure will now be achieved without the use of chemotherapy. It is hoped that limiting chemotherapy will reduce mortality even further, particularly among more vulnerable older adults whose survival lagged behind that of younger patients...
December 2, 2016: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/27913413/new-arsenate-reductase-gene-arra-pcr-primers-for-diversity-assessment-and-quantification-in-environmental-samples
#14
Babur S Mirza, Darwin L Sorensen, R Ryan Dupont, Joan E McLean
: The extent of arsenic contamination in drinking water and its potential threat to human health have resulted in considerable research interest in the microbial species responsible for arsenic reduction. The arsenate reductase gene (arrA), an important component of the microbial arsenate reduction system, has been widely used as a biomarker to study arsenate reducing microorganisms. A new primer pair was designed and evaluated for qPCR and high-throughput sequencing of the arrA gene, because currently available PCR primers are not suitable for these applications...
December 2, 2016: Applied and Environmental Microbiology
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/27912099/citrate-enhanced-release-of-arsenic-during-pyrite-oxidation-at-circumneutral-conditions
#16
Peng Zhang, Weiyu Yao, Songhu Yuan
The release of arsenic (As) from the oxidation of As-rich pyrite is an important source of the high arsenic in groundwater. As a widespread low-molecular-weight organic acid, citrate plays an important role on the cycling of Fe(II)/Fe(III) through complexation in circumneutral subsurface environments, while the influence of citrate on the release of As from the oxidation of As-rich pyrite is poorly understood. In this study, As was loaded onto pyrite particles under anoxic conditions, and its release was investigated in the presence of 0-1 mM citrate at pH 7...
November 24, 2016: Water Research
https://www.readbyqxmd.com/read/27911670/quantitative-assessment-of-metal-elements-using-moss-species-as-biomonitors-in-downwind-area-of-lead-zinc-mine
#17
Biljana Balabanova, Trajče Stafilov, Robert Šajn, Katerina Bačeva Andonovska
Distributions of a total of 21 elements were monitored in significantly lead-zinc polluted area using moss species (Hypnum cupressiforme and Camptothecium lutescens) used interchangeably, covering a denser sampling network. Interspecies comparison was conducted using Box-Cox transformed values, due to their skewed distribution. The median concentrations of trace elements in the both mosses examined decreased in the following order: Fe>Mn>Zn>Pb>Cu>Ni∼Cr∼As>Co>Cd>Hg. For almost all analyzed elements, H...
December 2, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
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/27908626/intercropped-pteris-vittata-l-and-morus-alba-l-presents-a-safe-utilization-mode-for-arsenic-contaminated-soil
#19
Xiaoming Wan, Mei Lei, Tongbin Chen, Junxing Yang
Intercropping technology provides income for owners of contaminated soil without increasing environmental risk. Therefore, intercropping of arsenic (As) hyperaccumulator Pteris vittata L. with economic crops is now widely utilized in slightly or moderately As-contaminated farmlands. However, the mechanisms for As mobilization and absorption within the intercropping system are still unclear. To clarify As mobilization and absorption within an intercropping system, portable X-ray fluorescence spectrometry and sequential extraction were utilized to detect the spatial distribution and speciation of As in an intercropped system of P...
November 28, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27908426/environmental-exposures-of-trace-elements-assessed-using-keratinized-matrices-from-patients-with-chronic-kidney-diseases-of-uncertain-etiology-ckdu-in-sri-lanka
#20
Saranga Diyabalanage, Sanjeewani Fonseka, D M S N B Dasanayake, Rohana Chandrajith
An alarming increase in chronic kidney disease with unknown etiology (CKDu) has recently been reported in several provinces in Sri Lanka and chronic exposures to toxic trace elements were blamed for the etiology of this disease. Keratinized matrices such as hair and nails were investigated to determine the possible link between CKDu and toxic element exposures. Elements Li, B, Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Sr, Mo, Cd, Ba, Hg and Pb of hair and nails of patients and age that matched healthy controls were determined with Inductively Coupled Plasma Mass Spectrometry (ICP-MS)...
January 2017: Journal of Trace Elements in Medicine and Biology
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