4,179 results match your criteria manganese lead


In-situ datasets of important physical and bio-chemical parameters in the continental shelf of the northern Bay of Bengal.

Data Brief 2021 Apr 15;35:106947. Epub 2021 Mar 15.

Bangladesh Oceanographic Research Institute, Ramu, Cox's bazar, Bangladesh.

Data equipped with this article were collected from Northern Bay of Bengal (NBoB) wrapping both the eastern and western coast for CTD and sediment samples and only the eastern coast for water sampling. In-situ data of physical parameters, heavy metals, elements, Total Organic Carbon (TOC), nutrients, chlorophyll-a and phaeopigment were sampled across the shallow continental shelf. These data were assembled from 15 CTD points, 76 water samples, and 10 surface sediment samples adjacent to Bangladesh coast. Read More

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Assessment of heavy metals in farmed shrimp, sampled from Khulna, Bangladesh: An inimical to food safety aspects.

Heliyon 2021 Mar 24;7(3):e06587. Epub 2021 Mar 24.

Department of Aquaculture, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh.

The analytical experiment was executed to present detailed reports on the concentration of heavy metals (nickel, iron, zinc, manganese, chromium, lead, and cadmium) in farmed shrimp, and its concomitant human health risks upon consumption. A total of 147 farms from six sub-districts of Khulna were selected for sample collection and concentration of heavy metals were determined by Atomic Absorption Spectrometry (AAS) method, following electro-thermal heater digestion. Ni and Cr were found considerably below the detectable limit (BDL) in four sub-districts, while Cr found in shrimps from Rupsa and Paikgacha were far higher than the maximum recommended limit defined by FAO and WHO. Read More

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Translocation factor of heavy metals by elephant grass grown with varying concentrations of landfill leachate.

Environ Sci Pollut Res Int 2021 Apr 10. Epub 2021 Apr 10.

Center of Agrarian Sciences, Federal University of Ceará, Av. Mister Hull s/n Antônio Bezerra, Fortaleza, CE, Brazil.

The aim of this study is to obtain the translocation factor by application of landfill leachate (LL) diluted in public irrigation water (IW). Pennisetum purpureum Schum (elephant grass) was cultivated for 83 days in an experimental water reuse unit. The present work was developed at the Experimental Water Reuse Unit (UERA), on the UFERSA campus in Mossoró, RN, Brazil. Read More

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Spatial Distribution of Heavy Metals and Pollution of Environmental Media Around a Used Lead-acid Battery Recycling Center in Ibadan, Nigeria.

J Health Pollut 2021 Mar 2;11(29):210304. Epub 2021 Mar 2.

Department of Environmental Health Sciences, University of Michigan, Ann Arbor, USA.

Background: Heavy metals are usually present in trace amounts in various environmental media such as water, soil, and air, and many are poisonous to human health even at very low concentrations.

Objectives: To assess the risk of heavy metal contamination of water, soil, and plants around a used lead acid battery (ULAB) recycling center in Ibadan, Nigeria.

Methods: Environmental samples (water, soil, and plants) were collected using standard methods and concentrations of arsenic (As), cadmium (Cd), antimony (Sb), chromium (Cr), copper (Cu), manganese (Mn), nickel (Ni), lead (Pb), selenium (Se), and zinc (Zn) were determined using inductively coupled plasma-optical emission spectrometry at the International Institute of Tropical Agriculture, Ibadan, Nigeria. Read More

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Metals associated neurodegeneration in Parkinson's disease: Insight to physiological, pathological mechanisms and management.

Neurosci Lett 2021 Apr 1;753:135873. Epub 2021 Apr 1.

Neuroscience Division, Department of Pharmacology, ISF College of Pharmacy, Moga, Punjab, 142001, India. Electronic address:

Parkinson's disease (PD) is a deliberately progressive neurological disorder, arises due to degeneration of dopaminergic neurons in the substantia nigra pars compacta (SNpc). The loss of dopaminergic nerves and dopamine deficiency leads to motor symptoms characterized by rigidity, tremor, and bradykinesia. Heavy metals and trace elements play various physiological and pathological roles in the nervous system. Read More

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Maternal blood metal concentrations and whole blood DNA methylation during pregnancy in the Early Autism Risk Longitudinal Investigation (EARLI).

Epigenetics 2021 Apr 2:1-16. Epub 2021 Apr 2.

Wendy Klag Center for Autism and Developmental Disabilities, Johns Hopkins University, Baltimore, USA.

The maternal epigenome may be responsive to prenatal metals exposures. We tested whether metals are associated with concurrent differential maternal whole blood DNA methylation. In the Early Autism Risk Longitudinal Investigation cohort, we measured first or second trimester maternal blood metals concentrations (cadmium, lead, mercury, manganese, and selenium) using inductively coupled plasma mass spectrometry. Read More

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The effects of some essential and toxic metals/metalloids in COVID-19: A review.

Food Chem Toxicol 2021 Mar 29;152:112161. Epub 2021 Mar 29.

Laboratory of Toxicology and Environmental Health, School of Medicine, Universitat Rovira i Virgili, Sant Llorens 21, 43201, Reus, Catalonia, Spain.

Thousands of studies have been conducted in order to understand in depth the characteristics of the novel coronavirus SARS-CoV-2, its infectivity and ways of transmission, and very especially everything related to the clinical and severity of the COVID-19, as well as the potential treatments. In this sense, the role that essential and toxic metals/metalloids have in the development and course of this disease is being studied. Metals/metalloids such as arsenic, cadmium, lead, mercury or vanadium, are elements with known toxic effects in mammals, while trace elements such as cobalt, copper, iron, manganese, selenium and zinc are considered essential. Read More

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Manganese Doping Promotes the Synthesis of Bismuth-based Perovskite Nanocrystals While Tuning Their Band Structures.

Small 2021 Apr 1:e2100101. Epub 2021 Apr 1.

Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, Tampere, FI-33014, Finland.

The doping of halide perovskite nanocrystals (NCs) with manganese cations (Mn ) has recently enabled enhanced stability, novel optical properties, and modulated charge carrier dynamics of the NCs host. However, the influence of Mn doping on the synthetic routes and the band structures of the host has not yet been elucidated. Herein, it is demonstrated that Mn doping promotes a facile, safe, and low-hazard path toward the synthesis of ternary Cs Bi I NCs by effectively inhibiting the impurity phase (i. Read More

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Microplastics as vectors of metals contamination in Mediterranean Sea.

Environ Sci Pollut Res Int 2021 Mar 30. Epub 2021 Mar 30.

Liguria e Valle d'Aosta, Chemistry Department, Istituto Zooprofilattico Sperimentale del Piemonte, via Bologna 148, 10154, Turin, Italy.

Microplastics are contaminants of great concern all over the world. Microplastics constitute pollutants themselves; moreover, other contaminants such as metals are easily absorbed on their plastic surface, becoming bioavailable to marine biota such as zooplankton.We collected marine zooplankton from Mediterranean Sea to investigate trace elements associated with microplastics. Read More

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Monitoring of heavy metal pollution in urban and rural environments across Pakistan using House crows (Corvus splendens) as bioindicator.

Environ Monit Assess 2021 Mar 30;193(4):237. Epub 2021 Mar 30.

School of Science, Monash University Malaysia, Selangor Darul Ehsan, Bandar Sunway, Malaysia.

A widely distributed urban bird, the house crow (Corvus splendens), was used to assess bioavailable heavy metals in urban and rural environments across Pakistan. Bioaccumulation of arsenic (As), zinc (Zn), lead (Pb), cadmium (Cd), nickel (Ni), iron (Fe), manganese (Mn), chromium (Cr), and copper (Cu) was investigated in wing feathers of 96 crows collected from eight locations and categorized into four groups pertaining to their geographical and environmental similarities. Results revealed that the concentrations of Pb, Ni, Mn, Cu, and Cr were positively correlated and varied significantly among the four groups. Read More

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Origin, fate and ecotoxicity of manganese from legacy metallurgical wastes.

Chemosphere 2021 Mar 19;277:130337. Epub 2021 Mar 19.

UMR CNRS 6249 Chrono-Environnement, Université Bourgogne Franche-Comté, Route de Gray, 25030, Besançon Cedex, France. Electronic address:

Over the course of history, mining and metallurgical activities have influenced the socioeconomic development of human populations. However, these past and current activities can also lead to substantial environmental contamination by various metals. Here, we used an interdisciplinary approach (incorporating archaeology, mineralogy, environmental chemistry and ecotoxicology) to investigate the origin, fate and potential ecotoxicity of anomalous manganese (Mn) concentrations detected in the ancient mining district of Berthelange (medieval period, eastern France). Read More

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Gestational Exposure to Toxicants and Autistic Behaviors using Bayesian Quantile Regression.

Am J Epidemiol 2021 Mar 29. Epub 2021 Mar 29.

Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia, Canada.

Autism Spectrum Disorder, which is characterized by impaired social communication and stereotypic behaviors, affects 1-2% of children. While prenatal exposure to toxicants has been associated with autistic behaviors, most studies have focused on shifts in mean behavior scores. We used Bayesian quantile regression to assess the associations between log2-transformed toxicant concentrations and autistic behaviors across the distribution of behaviors. Read More

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Associations of metals and neurodevelopment: a review of recent evidence on susceptibility factors.

Curr Epidemiol Rep 2020 Dec 30;7(4):237-262. Epub 2020 Oct 30.

Department of Environmental Health, Boston University School of Public Health, Boston, MA, USA.

Purpose Of Review: Epidemiologic evidence exists that many metals are associated with adverse neurobehavioral effects in young children, including lead (Pb), methylmercury (meHg), manganese (Mn) and arsenic (As). Importantly, chemical insult can vary depending on host factors and exposure circumstance. This systematic review summarizes the recent literature investigating modifying factors of the associations between metals and neurodevelopment, including immutable traits (sex or genetics) or exposure conditions (timing or co-exposures). Read More

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December 2020

Effects of the natural environment and human activities on iron and manganese content in groundwater: a case study of Changchun city, Northeast China.

Environ Sci Pollut Res Int 2021 Mar 28. Epub 2021 Mar 28.

Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, China.

Excessive Fe and Mn in groundwater of the Songnen Plain, northeast China, pose a threat to water security. Human activities over recent decades have had significant effects on the water quantity and quality of the Songnen Plain. By adopting the large city of Changchun in the Songnen Plain as a research area, this study analyzed the effects of the natural environment (including characteristics of soil and aquifer, climate, and groundwater level) and human activities (including groundwater salinization, groundwater exploitation, and nitrate effects) on groundwater Fe and Mn using statistical and spatial analysis methods. Read More

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Associations between blood and urinary manganese with metabolic syndrome and its components: Cross-sectional analysis of National Health and Nutrition Examination Survey 2011-2016.

Sci Total Environ 2021 Mar 18;780:146527. Epub 2021 Mar 18.

Hong Kong Institute of Diabetes and Obesity, The Chinese University of Hong Kong, Hong Kong SAR, China. Electronic address:

Manganese (Mn) may improve cardiometabolic health with its anti-oxidative ability. However, epidemiological evidence on the overall and sex-specific relationship between Mn exposure and metabolic syndrome (MetS) has been inconclusive. We evaluated the associations of urinary (n = 1713) and blood (n = 3335) Mn levels with the prevalence of MetS, its components (elevated waist circumference, impaired glucose metabolism, elevated blood pressure and dyslipidemia) and sex-dependent heterogeneities among participants in the United States National Health and Nutrition Examination Survey 2011-2016. Read More

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Metal and essential element concentrations during pregnancy and associations with autism spectrum disorder and attention-deficit/hyperactivity disorder in children.

Environ Int 2021 Mar 22;152:106468. Epub 2021 Mar 22.

Division of Mental and Physical Health, Norwegian Institute of Public Health, PO Box 222 Skøyen, 0213 Oslo, Norway.

Background: Prenatal exposure to toxic metals or variations in maternal levels of essential elements during pregnancy may be a risk factor for neurodevelopmental disorders such as attention-deficit/hyperactivity disorder (ADHD) and autism spectrum disorder (ASD) in offspring.

Objectives: We investigated whether maternal levels of toxic metals and essential elements measured in mid-pregnancy, individually and as mixtures, were associated with childhood diagnosis of ADHD or ASD.

Methods: This study is based on the Norwegian Mother, Father and Child Cohort Study and included 705 ADHD cases, 397 ASD cases and 1034 controls. Read More

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Data on elemental concentrations in marine sediments from the South and South West of England.

Data Brief 2021 Apr 23;35:106901. Epub 2021 Feb 23.

Institute of Marine Sciences, School of Biological Sciences, University of Portsmouth, Ferry Road, Portsmouth PO4 9LY, United Kingdom.

The present Data In Brief methodological paper details the acquisition, mining and pre-processing of elemental concentration data in marine sediments (coastal and open sea) of Southern England, presented and discussed in the co-submitted Environment International paper entitled: "Three decades of trace element sediment contamination: the mining of governmental databases and the need to address hidden sources for clean and healthy seas" [1]. Elemental sediment concentration data were obtained from the two main UK environmental sources, i.e. Read More

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Efficient electrocatalytic formic acid oxidation over PdAu-manganese oxide/carbon.

J Colloid Interface Sci 2021 Mar 9;593:244-250. Epub 2021 Mar 9.

Shanghai Engineering Research Center of Hierarchical Nanomaterials, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China; School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China. Electronic address:

Developing high efficient Palladium-metal-based electrocatalysts is of great significance for formic acid oxidation (FAO) reaction. Here, we experimentally synthesize PdAu alloy composited with MnOx electrocatalyst (PdAu-MnOx/C) and illustrate its remarkable FAO performance. By virtue of theory studies, we find that Pd-Au bridges have superior adsorption ability towards HCOO* and oxygen vacancies in MnOx make HCOO* formation from HCOOH easier, synergistically lead to the outstanding FAO performance with specific activity and mass activity of 19. Read More

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[Changes in Concentrations and Pollution Levels of Trace Elements of Floodplain Sediments of Poyang Lake Basin in Recent Twenty Years].

Huan Jing Ke Xue 2021 Apr;42(4):1724-1738

Institute of Geophysical & Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China.

Investigating the pollution conditions of trace elements in the Poyang Lake basin, identifying the pollution sources, evaluating the ecological risks play an important part in formulating the effective strategies for protecting the basin ecosystem. To understand the concentration characteristics, pollution levels, and ecological risks of twelve trace elements (Cd, Hg, Pb, As, Cu, Zn, Cr, Ni, Mn, Sb, W, and Sn) in the floodplain sediments of the five main tributaries in Poyang Lake basin in the past twenty years, we used the enrichment factor (EF) and modified pollution index (MPI) to quantify the pollution levels of the trace elements, and analyzed and discussed the pollution sources in the areas with significant pollution level changes. The results indicated that the concentrations of cadmium, zinc, manganese, tungsten and lead in the floodplain sediments of the Poyang Lake basin during the past twenty years have increased by 134%, 26%, 41%, 25%, and 8%, respectively, and mercury, arsenic, chromium, nickel, antimony, and tin have decreased by 35%, 15%, 22%, 10%, 14%, and 13%, respectively, while copper has not changed significantly. Read More

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An in-depth human health risk assessment of potentially toxic elements in highly polluted riverine soils, Příbram (Czech Republic).

Environ Geochem Health 2021 Mar 19. Epub 2021 Mar 19.

Department of Soil Science and Soil Protection, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Prague-Suchdol, Prague, Czech Republic.

Environmental pollution by potentially toxic element (PTE) and the associated health risks in humans are increasingly becoming a global challenge. The current study is an in-depth assessment of PTEs including the often studied lead (Pb), manganese (Mn), zinc (Zn), arsenic (As) and the less-studied titanium (Ti), rubidium (Rb), strontium (Sr), zirconium (Zr), barium (Ba) and thorium (Th) in highly polluted floodplain topsoil samples from the Litavka River, Czech Republic. Soil chemical properties including carbon (C) and reaction (pH_HO) together with iron (Fe) were assessed in the same soils. Read More

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Increase of Cardiometabolic Biomarkers Among Vehicle Inspectors Exposed to PM0.25 and Compositions.

Saf Health Work 2021 Mar 29;12(1):114-118. Epub 2020 Aug 29.

Center of Nuclear Technology for Materials and Radiometry, BATAN Bandung, Indonesia.

Background: Exposure to particulate matter (PM) emitted from vehicle exhaust might disrupt systemic function and elevate the risk of cardiovascular disease. In this study, we examined the changes of cardiometabolic biomarkers among vehicle inspectors exposed daily to PM0.25 and components. Read More

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Heavy metal accumulation of urban Scots pine (Pinus sylvestris L.) plantation.

Environ Monit Assess 2021 Mar 15;193(4):192. Epub 2021 Mar 15.

Eastern Anotalia High Tecnology Applications and Research Center Office, Atatürk University, Ataturk, Turkey.

In soil and plant tissues, the concentrations and reserves of manganese (Mn), zinc (Zn), nickel (Ni), copper (Cu), and lead (Pb) were calculated to measure the heavy metal quantities of the Scots pine afforestation. In the soil and plant tissues, heavy metal concentrations varied. The highest concentration of heavy metal was found in Mn and the lowest concentration in Pb in the soil. Read More

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Identification and Characterization of and subsp. Zinc Transporters.

J Bacteriol 2021 Mar 15. Epub 2021 Mar 15.

Institute for Microbiology, Department of Infectious Diseases, University of Veterinary Medicine Hannover, Hannover, Germany

Zinc uptake in bacteria is essential to maintain cellular homeostasis and survival. ZnuABC is an important zinc importer of numerous bacterial genera, which is expressed to restore zinc homeostasis when the cytosolic concentration decreases beyond a critical threshold. Upon zinc limitation the fast-growing nonpathogenic organism (MSMEG) as well as the ruminant pathogen subsp. Read More

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Anthropogenic and Environmental Constraints on the Microbial Methane Cycle in Coastal Sediments.

Front Microbiol 2021 18;12:631621. Epub 2021 Feb 18.

Department of Microbiology, Institute for Water and Wetland Research, Radboud University Nijmegen, Nijmegen, Netherlands.

Large amounts of methane, a potent greenhouse gas, are produced in anoxic sediments by methanogenic archaea. Nonetheless, over 90% of the produced methane is oxidized via sulfate-dependent anaerobic oxidation of methane (S-AOM) in the sulfate-methane transition zone (SMTZ) by consortia of anaerobic methane-oxidizing archaea (ANME) and sulfate-reducing bacteria (SRB). Coastal systems account for the majority of total marine methane emissions and typically have lower sulfate concentrations, hence S-AOM is less significant. Read More

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February 2021

Highly efficient and selectivity removal of heavy metal ions using single-layer NaKMnO nanosheet: A combination of experimental and theoretical study.

Chemosphere 2021 Feb 22;275:130068. Epub 2021 Feb 22.

Shandong Feiyuan Technology CO., LTD. Zibo, 255100, People's Republic of China.

Manganese oxides (MnO) are widely applied in heavy metal ions removal due to their low-cost, environmental-friendly and biocompatibility. However, the adsorption capacity of MnO need to be further improved to satisfy the demand of practical application. Herein, a highly dispersed single layer NaKMnO nanosheet was synthesized by a facile wet-chemical method with sodium dodecyl sulfonate as surfactant. Read More

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February 2021

A Tonoplast-associated Calcium Signaling Regulates Manganese Homeostasis in Arabidopsis.

Mol Plant 2021 Mar 4. Epub 2021 Mar 4.

State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China. Electronic address:

Manganese (Mn) is an essential micronutrient in plants. However, excessive Mn absorption in acidic and waterlogged soils can lead to Mn toxicity. Despite their essential roles in Mn homeostasis, the transcriptional and post-transcriptional modification of Mn transporters remain poorly understood. Read More

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Identification of Three Small Molecules That Can Selectively Influence Cellular Manganese Levels in a Mouse Striatal Cell Model.

Molecules 2021 Feb 22;26(4). Epub 2021 Feb 22.

School of Health Sciences, Purdue University, West Lafayette, IN 47906, USA.

Manganese (Mn) is a biologically essential metal, critical as a cofactor for numerous enzymes such a glutamine synthetase and kinases such as ataxia-telangiectasia mutated (ATM). Similar to other essential metals such as iron and zinc, proper levels of Mn need to be achieved while simultaneously being careful to avoid excess levels of Mn that can be neurotoxic. A lifetime of occupational exposure to Mn can often lead to a Parkinsonian condition, also known as "manganism", characterized by impaired gait, muscle spasms, and tremors. Read More

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February 2021

Evaluation of Fetal Exposures to Metals and Metalloids through Meconium Analyses: A Review.

Int J Environ Res Public Health 2021 Feb 18;18(4). Epub 2021 Feb 18.

Department of Occupational and Environmental Health, Milken Institute School of Public Health, George Washington University, Washington, DC 20052, USA.

This paper surveys the existing scientific literature on metals concentrations in meconium. We examine some 32 papers that analyzed meconium for aluminum, arsenic, barium, calcium, chromium, copper, iron, lithium, magnesium, manganese, zinc, lead, mercury, manganese, molybdenum, nickel, phosphorus, lead, antimony, selenium, tin, vanadium, and zinc. Because of the lack of detail in the statistics it is not possible to do a rigorous meta-analysis. Read More

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February 2021

Associations among Heavy Metals and Proteinuria and Chronic Kidney Disease.

Diagnostics (Basel) 2021 Feb 11;11(2). Epub 2021 Feb 11.

Department of Internal Medicine, Kaohsiung Municipal Siaogang Hospital, Kaohsiung Medical University, Kaohsiung 812, Taiwan.

Background: The prevalence of chronic kidney disease (CKD) is increasing annually in Taiwan. In addition to traditional risk factors, heavy metals contribute to the development of CKD. The aim of this study was to investigate associations among heavy metals and proteinuria and CKD in the general population in Southern Taiwan. Read More

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February 2021

Levels of trace blood elements associated with severe sleep disturbance in maintenance hemodialysis patients.

Sleep Breath 2021 Mar 5. Epub 2021 Mar 5.

Department of Nephrology, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China.

Purpose: Sleep disturbance is frequently observed in patients on maintenance hemodialysis (MHD), and this population usually presents imbalances in trace elements. We investigated the association between blood trace element levels and sleep quality in patients on MHD.

Methods: This cross-sectional and single-center study was performed in September 2019. Read More

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