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https://www.readbyqxmd.com/read/29882119/evaluation-of-arsenic-cadmium-nickel-and-lead-in-common-spices-in-pakistan
#1
Jameel Ahmed Baig, Saba Bhatti, Tasneem Gul Kazi, Hassan Imran Afridi
The quantitative assessments and daily intake of arsenic (As), cadmium (Cd), nickel (Ni) and lead (Pb) were conducted in the 26 common spices collected from the market of Hyderabad, Pakistan. Conventional acid digestion procedure was applied for dissolution of common spices and the contents of toxic elemental were determined by graphite furnace atomic absorption spectrometry. The conventional acid digestion method was validated by certified reference materials and standard addition. A wide variability was observed in the levels of toxic elements in common spices...
June 7, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29866561/assessment-of-chromium-and-nickel-levels-in-surface-sea-waters-and-sediments-from-industrial-marine-area-in-tuzla-aydinli-bay-istanbul-turkey
#2
Asli Baysal, Suleyman Akman
The determination and evaluation of nickel and chromium in Tuzla Aydinli Bay is an important subject since it is an industrial marine area for decades and it is crucial to protect aquatic life which are toxic for the aqueous environment. In this study, 32 samples were collected both from near the coastal shipyard activity to far of the activity areas in Tuzla Aydinli Bay, Istanbul (Turkey) according to the standard guidance. Nickel and chromium were determined in the sea water and sediment samples by graphite furnace atomic absorption spectrometry...
May 2018: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/29849640/infant-exposure-to-metals-through-consumption-of-formula-feeding-in-mekelle-ethiopia
#3
Tadele Eticha, Melat Afrasa, Getu Kahsay, Hailekiros Gebretsadik
This study aimed at determination of heavy metals (cadmium, lead, and zinc) in milk-based infant formulas collected from Mekelle, Ethiopia, and their associated health risks to the infants through consumption of these products. The infant feeding samples were dry-ashed in a muffle furnace followed by digestion in nitric acid and the resulting solutions were analyzed by flame atomic absorption spectrophotometer. Cadmium was not detected in the samples while the levels of lead and zinc ranged from not detected value to 0...
2018: International Journal of Analytical Chemistry
https://www.readbyqxmd.com/read/29795392/understanding-the-connection-between-nanoparticle-uptake-and-cancer-treatment-efficacy-using-mathematical-modeling
#4
Terisse A Brocato, Eric N Coker, Paul N Durfee, Yu-Shen Lin, Jason Townson, Edward F Wyckoff, Vittorio Cristini, C Jeffrey Brinker, Zhihui Wang
Nanoparticles have shown great promise in improving cancer treatment efficacy while reducing toxicity and treatment side effects. Predicting the treatment outcome for nanoparticle systems by measuring nanoparticle biodistribution has been challenging due to the commonly unmatched, heterogeneous distribution of nanoparticles relative to free drug distribution. We here present a proof-of-concept study that uses mathematical modeling together with experimentation to address this challenge. Individual mice with 4T1 breast cancer were treated with either nanoparticle-delivered or free doxorubicin, with results demonstrating improved cancer kill efficacy of doxorubicin loaded nanoparticles in comparison to free doxorubicin...
May 24, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29784346/speciation-of-organic-inorganic-mercury-and-total-mercury-in-blood-samples-using-vortex-assisted-dispersive-liquid-liquid-microextraction-based-on-the-freezing-of-deep-eutectic-solvent-followed-by-gfaas
#5
Reza Akramipour, Mohammad Reza Golpayegani, Simin Gheini, Nazir Fattahi
In this research, a new vortex assisted dispersive liquid-liquid microextraction based on the freezing of deep eutectic solvent (VADLLME-FDES) has been developed for the determination of organic mercury (R-Hg) and inorganic mercury (Hg2+ ) in blood samples prior to their analysis by graphite furnace atomic absorption spectrometry (GFAAS). In this method, a green solvent consisting of 1-octyl-3-methylimidazolium chloride and 1-undecanol was used as an extraction solvent, yielding the advantages of material stability, low density, and a suitable freezing point near room temperature...
August 15, 2018: Talanta
https://www.readbyqxmd.com/read/29740802/identification-of-biomarkers-of-mercury-contamination-in-brachyplatystoma-filamentosum-of-the-madeira-river-brazil-using-metalloproteomic-strategies
#6
João Vitor de Queiroz, José Cavalcante Souza Vieira, Grasieli de Oliveira, Camila Pereira Braga, Izabela da Cunha Bataglioli, Janaína Macedo da Silva, Wellington Luiz de Paula Araújo, Pedro de Magalhães Padilha
Predator fish can accumulate high levels of mercury, which qualifies them as potential indicators of this toxic metal. The predatory species Brachyplatystoma filamentosum, popularly known as filhote, is among the most consumed species in the Brazilian Amazon. Continuing the metalloproteomic studies of mercury in Amazonian fishes that have been developed in the last 5 years, the present paper provides the data of protein characterization associated with mercury in muscle and liver samples of filhote (Brachyplatystoma filamentosum) collected in the Madeira River, Brazilian Amazon...
May 8, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29558399/an-assessment-of-dietary-exposure-to-cadmium-in-residents-of-guangzhou-china
#7
Weiwei Zhang, Yungang Liu, Yufei Liu, Boheng Liang, Hongwei Zhou, Yingyue Li, Yuhua Zhang, Jie Huang, Chao Yu, Kuncai Chen
Cadmium and its compounds are human carcinogens with severe organ toxicity, and their contamination of agricultural soil in China has been frequently reported; however, the dietary exposure to cadmium in residents and the relevant health risk have seldom been reported. In this study, the concentration of cadmium in various types of food collected from 2013 to 2015 were analyzed using graphite furnace atomic absorption spectrometry, and the dietary exposure to cadmium assessed based on a dietary survey in 2976 Guangzhou residents...
March 20, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29514563/metal-composition-of-ambient-pm-2-5-influences-the-pulmonary-function-of-schoolchildren-a-case-study-of-school-located-nearby-of-an-electric-arc-furnace-factory
#8
Bing-Fang Huang, Ya-Chi Chang, Ai-Ling Han, Hui-Tsung Hsu
The present study combined air sampling with pulmonary function tests (PFTs) to determine both the extent of air pollution proximal to an electric arc furnace (EAF) and its impact on human health. The mass concentrations of particulate matter with aerodynamic diameters less than 2.5 µm (PM2.5 ) in exposure areas were not significantly higher than the samples taken at a control area. However, the concentrations of five metal elements, Cd, Cr, Cu, Ni, and Zn in PM2.5 were significantly higher in the exposure area than that of the control area...
April 2018: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/29479882/cadmium-and-lead-in-women-who-miscarried
#9
Wioleta J Omeljaniuk, Katarzyna Socha, Jolanta Soroczynska, Angelika E Charkiewicz, Tadeusz Laudanski, Marek Kulikowski, Edward Kobylec, Maria H Borawska
BACKGROUND: Cadmium (Cd) and lead (Pb) are toxic elements which, when ingested excessively in food and drinking water, accumulate in selected organs and pass through the placenta barrier to the foetus, showing teratogenic effects. The aim of the study was to determine the concentration of Cd and Pb in blood and placental tissue in women who miscarried. METHODS: The study group consisted of 83 women who miscarried. The control group included 35 women in the first trimester of pregnancy and after childbirth...
January 1, 2018: Clinical Laboratory
https://www.readbyqxmd.com/read/29433032/seasonal-variations-of-pcdd-fs-congeners-in-air-soil-and-eggs-from-a-polish-small-scale-farm
#10
Malgorzata Węgiel, Ryszard Chrząszcz, Anna Maślanka, Adam Grochowalski
The transfer of dioxin from the environment to the food is a problem in a consumers' health protection. The study aimed to determine the concentration of dioxins in free-range chicken eggs, air and soil samples, collected during 12 months on an individual small farm, located in Małopolska region, Poland. In the majority of analyzed eggs, the concentrations of dioxin exceeded several times the legal limit of 2.5 pg WHO-TEQ g-1fat. Seasonal changes in the PCDD/Fs congeners in egg, air and soil samples were studied...
May 2018: Chemosphere
https://www.readbyqxmd.com/read/29373863/mutagenicity-and-lung-toxicity-of-smoldering-vs-flaming-emissions-from-various-biomass-fuels-implications-for-health-effects-from-wildland-fires
#11
Yong Ho Kim, Sarah H Warren, Q Todd Krantz, Charly King, Richard Jaskot, William T Preston, Barbara J George, Michael D Hays, Matthew S Landis, Mark Higuchi, David M DeMarini, M Ian Gilmour
BACKGROUND: The increasing size and frequency of wildland fires are leading to greater potential for cardiopulmonary disease and cancer in exposed populations; however, little is known about how the types of fuel and combustion phases affect these adverse outcomes. OBJECTIVES: We evaluated the mutagenicity and lung toxicity of particulate matter (PM) from flaming vs. smoldering phases of five biomass fuels, and compared results by equal mass or emission factors (EFs) derived from amount of fuel consumed...
January 24, 2018: Environmental Health Perspectives
https://www.readbyqxmd.com/read/29372528/hydration-of-dicalcium-silicate-and-diffusion-through-neo-formed-calcium-silicate-hydrates-at-weathered-surfaces-control-the-long-term-leaching-behaviour-of-basic-oxygen-furnace-bof-steelmaking-slag
#12
Douglas I Stewart, Andrew W Bray, Gideon Udoma, Andrew J Hobson, William M Mayes, Mike Rogerson, Ian T Burke
Alkalinity generation and toxic trace metal (such as vanadium) leaching from basic oxygen furnace (BOF) steel slag particles must be properly understood and managed by pre-conditioning if beneficial reuse of slag is to be maximised. Water leaching under aerated conditions was investigated using fresh BOF slag at three different particle sizes (0.5-1.0, 2-5 and 10 × 10 × 20 mm blocks) and a 6-month pre-weathered block. There were several distinct leaching stages observed over time associated with different phases controlling the solution chemistry: (1) free-lime (CaO) dissolution (days 0-2); (2) dicalcium silicate (Ca2 SiO4 ) dissolution (days 2-14) and (3) Ca-Si-H and CaCO3 formation and subsequent dissolution (days 14-73)...
April 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29310275/cai-and-sri-molecules-for-iodine-determination-by-high-resolution-continuum-source-graphite-furnace-molecular-absorption-spectrometry-greener-molecules-for-practical-application
#13
Melina Borges Teixeira Zanatta, Flávio Venâncio Nakadi, Márcia Andreia Mesquita Silva da Veiga
A new method to determine iodine in drug samples by high-resolution continuum source graphite furnace molecular absorption spectrometry (HR-CS GF MAS) has been developed. The method measures the molecular absorption of a diatomic molecule, CaI or SrI (less toxic molecule-forming reagents), at 638.904 or 677.692nm, respectively, and uses a mixture containing 5μg of Pd and 0.5μg of Mg as chemical modifier. The method employs pyrolysis temperatures of 1000 and 800°C and vaporization temperatures of 2300 and 2400°C for CaI and SrI, respectively...
March 1, 2018: Talanta
https://www.readbyqxmd.com/read/29282659/an-ecological-risk-investigation-of-marine-sediment-from-the-northern-mediterranean-coasts-aegean-sea-using-multiple-methods-of-pollution-determination
#14
Evren Tunca, Mehmet Aydın, Ülkü Alver Şahin
The aim of this study is an assessment of metal pollution levels in Aegean Sea sediment. Sediment samples collected from 7 different locations (Yeniköy, Edremit, Ayvalık, Dikili, Aliağa, Hekimadası, and Ildır) along the northern Mediterranean region of Turkey were investigated for 11 elements (Cu, Fe, Zn, V, Cd, Ni, As, Pb, Mn, Co, and Cr). Graphite furnace atomic absorption spectrophotometry (GFAAS) and flame atomic absorption spectrophotometry (FAAS) were used for elemental analysis. The findings were evaluated with sediment assessment methods by taking two different values as a reference and then investigating the adverse biological effects of elemental profiles on living organisms...
March 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29126025/metallurgical-residues-reused-as-filler-after-35years-and-their-natural-weathering-implications-in-a-mountain-area
#15
Leticia Gómez-Nubla, Julene Aramendia, Silvia Fdez-Ortiz de Vallejuelo, Juan Manuel Madariaga
The natural weathering of EAF (Electric Arc Furnace) and LF (Ladle Furnace) steel slag was evaluated through changes in the mineralogical and elemental composition. For that purpose, black steel slag and mixture of black and white steel slag were collected from two forest tracks, where they had been used as filler 19 and 35years ago respectively in a protected mountain area. Primary/original and secondary/degradation compounds were identified by spectroscopic techniques (Raman Spectroscopy, X-Ray Diffraction (XRD) and Scanning Electron Microscopy/Energy Dispersive X-Ray Spectroscopy (SEM/EDS))...
November 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29113734/cellular-responses-of-human-astrocytoma-cells-to-dust-from-the-acheson-process-an-in-vitro-study
#16
Yke Jildouw Arnoldussen, Torunn Kringlen Ervik, Balazs Berlinger, Ida Kero, Sergey Shaposhnikov, Shanbeh Zienolddiny
Silicon carbide (SiC) is largely used in various products such as diesel particulate filters and solar panels. It is produced through the Acheson process where aerosolized fractions of SiC and other by-products are generated in the work environment and may potentially affect the workers' health. In this study, dust was collected directly on a filter in a furnace hall over a time period of 24h. The collected dust was characterized by scanning electron microscopy and found to contain a high content of graphite particles, and carbon and silicon containing particles...
March 2018: Neurotoxicology
https://www.readbyqxmd.com/read/28879468/source-contributions-to-total-concentrations-and-carcinogenic-potencies-of-polychlorinated-dibenzo-p-dioxins-and-polychlorinated-dibenzofurans-pcdd-fs-in-ambient-air-a-case-study-in-suzhou-city-china
#17
Zhiqiang Xuan, Chenglu Bi, Jiafu Li, Jihua Nie, Zhihai Chen
The potential source categories and source contributions of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) in ambient air from Suzhou City, China, were performed by principal component analysis-multiple linear regression (PCA-MLR) and positive matrix factorization (PMF). The carcinogenic potencies of PCDD/Fs were quantitatively apportioned based on the positive matrix factorization-toxic equivalent concentration (PMF-TEQ) method. The results of the present study were summarized as follows...
October 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28803145/plasmix-management-lca-of-six-possible-scenarios
#18
R Cossu, F Garbo, F Girotto, F Simion, A Pivato
Only a small percentage of the separately collected plastic is recycled. The mechanical selection process of source segregated plastic materials generates considerable amounts of residues that are commonly named as Plasmix. By means of a life cycle assessment (LCA) modelling, the environmental performances of the main Plasmix management options (thermal treatment, energy recovery, and landfilling) were compared. Six treatment scenarios, with different pre-treatment alternatives, were evaluated. Landfilling after waste washing and Plasmix substitution of coke in a blast furnace represent the most favorable options, since the performances of thermal treatment and energy recovery are worsened by specific emissions of a variety of toxic compounds and heavy metals within plastic materials as additives...
November 2017: Waste Management
https://www.readbyqxmd.com/read/28751028/toxic-metals-biomonitoring-based-on-prey-predator-interactions-and-environmental-forensics-techniques-a-study-at-the-romanian-ukraine-cross-border-of-the-black-sea
#19
Stefan-Adrian Strungaru, Mircea Nicoara, Carmen Teodosiu, Dragos Micu, Gabriel Plavan
Marine cross-border areas are ideal for monitoring pollutants so as to increase ecosystems protection. This study was conducted at the Romanian-Ukraine border of the Black Sea to reveal evidence of contamination with toxic metals based on biomonitoring of: cadmium, lead, total chromium, nickel and copper at different water depths and prey-predator interactions, combined with environmental forensics techniques of biological sampling and separation in witnesses size groups. The species used were Mytilus galloprovincialis L...
July 25, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28735402/determination-of-total-sulfur-sulfate-sulfite-thiosulfate-and-sulfolipids-in-plants
#20
Assylay Kurmanbayeva, Galina Brychkova, Aizat Bekturova, Inna Khozin, Dominic Standing, Dmitry Yarmolinsky, Moshe Sagi
In response to oxidative stress the biosynthesis of the ROS scavenger, glutathione is induced. This requires the induction of the sulfate reduction pathway for an adequate supply of cysteine, the precursor for glutathione. Cysteine also acts as the sulfur donor for the sulfuration of the molybdenum cofactor, crucial for the last step of ABA biosynthesis. Sulfate and sulfite are, respectively, the precursor and intermediate for cysteine biosynthesis and there is evidence for stress-induced sulfate uptake and further downstream, enhanced sulfite generation by 5'-phosphosulfate (APS) reductase (APR, EC 1...
2017: Methods in Molecular Biology
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