7,402 results match your criteria Toxicity Mercury


Toxicological effects of toxic metals (cadmium and mercury) on blood and the thyroid gland and pharmacological intervention by vitamin C in rabbits.

Environ Sci Pollut Res Int 2019 Apr 16. Epub 2019 Apr 16.

Department of Zoology, University of the Punjab, Lahore, Pakistan.

Cadmium and mercury are non-biodegradable toxic metals that may cause many detrimental effects to the thyroid gland and blood. Vitamin C has been found to be a significant chain-breaking antioxidant and enzyme co-factor against metal toxicity and thus make them less available for animals. The current study was performed to find the effect of individual metals (cadmium and mercury), their co-administration, and the ameliorative effects of vitamin C on some of the parameters that indicate oxidative stress and thyroid dysfunction. Read More

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http://dx.doi.org/10.1007/s11356-019-04886-9DOI Listing

Oral exposure to cadmium and mercury alone and in combination causes damage to the lung tissue of Sprague-Dawley rats.

Environ Toxicol Pharmacol 2019 Mar 28;69:86-94. Epub 2019 Mar 28.

Department of Anatomy, Faculty of Health Sciences, University of Pretoria, Private Bag x323, Arcadia, 0007, South Africa. Electronic address:

Environmental presence and human exposure to heavy metals in air and cigarette smoke has led to a worldwide increase in respiratory disease. The effects of oral exposure to heavy metals in liver and kidney structure and function have been widely investigated and the respiratory system as a target is often overlooked. The aim of the study was to investigate the possible structural changes in the lung tissue of Sprague-Dawley rats after oral exposure for 28 days to cadmium (Cd) and mercury (Hg), alone and in combination at 1000 times the World Health Organization's limit for each metal in drinking water. Read More

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http://dx.doi.org/10.1016/j.etap.2019.03.021DOI Listing
March 2019
2 Reads

Rapid detection of heavy metal-induced toxicity in water using a fed-batch sulfur-oxidizing bacteria (SOB) bioreactor.

J Microbiol Methods 2019 Apr 9. Epub 2019 Apr 9.

Department of Biological Environment, Kangwon National University, 192-1 Hyoja-dong, Gangwon-do, Chuncheon-si 200-701, Republic of Korea. Electronic address:

A fed-batch bioreactor based on sulfur-oxidizing bacteria (SOB) was tested for rapid detection of heavy metal-induced toxicity in water. For this evaluation, SOB were exposed to water contaminated by selenium, mercury, hexavalent chromium, arsenic, cyanide, cadmium, and lead for 2 h and their inhibition rates were analyzed based on changes in electrical conductivity (EC). The results demonstrate that SOB were highly inhibited by selenium, mercury, hexavalent chromium, and arsenic but not by cyanide, cadmium, and lead. Read More

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http://dx.doi.org/10.1016/j.mimet.2019.04.007DOI Listing
April 2019
1 Read

Evaluation of amalgam-related retinal neurotoxicity with optical coherence tomography findings.

Hum Exp Toxicol 2019 Apr 12:960327119842637. Epub 2019 Apr 12.

1 Department of Ophthalmology, School of Medicine, Adıyaman University, Adıyaman, Turkey.

Purpose: To evaluate the neurotoxic effect of amalgam dental fillings on plasma mercury (Hg) levels and retino-choroidal layers measured by spectral domain optical coherence tomography (SD-OCT).

Materials/methods: Study participants included 56 cases with amalgam dental fillings and 44 healthy controls. All participants were examined in terms of detailed ophthalmic examination, oral examination, and body mass index (BMI). Read More

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http://dx.doi.org/10.1177/0960327119842637DOI Listing

Tissue-based assessment of hazard posed by mercury and selenium to wild fishes in two shallow Chinese lakes.

Environ Sci Pollut Res Int 2019 Apr 8. Epub 2019 Apr 8.

State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.

Total (all forms of inorganic and organic) concentrations of mercury (Hg) and selenium (Se) were measured in dorsal muscle and eggs of wild fishes from two shallow lakes in China: Tai Lake (Ch: Taihu; TL) and Baiyangdian Lake (BYDL). Hazard quotients (HQs) were calculated by dividing concentrations of Se or Hg in muscle or eggs of fishes by threshold concentrations for effects expressed as tissue residue toxicity reference values (TR-TRVs). Concentrations of Hg in whole bodies of fishes were estimated by concentrations in muscle. Read More

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http://dx.doi.org/10.1007/s11356-019-04504-8DOI Listing
April 2019
1 Read

LSPR based optical fiber sensor with chitosan capped gold nanoparticles on BSA for trace detection of Hg (II) in water, soil and food samples.

Biosens Bioelectron 2019 Jun 22;134:90-96. Epub 2019 Mar 22.

Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India. Electronic address:

Mercury is a diversely bioaccumulating heavy metal pollutant toxic to all life forms. In this work, an optical biosensor has been developed and calibrated for universal detection and quantification of mercuric ions, in the range 0.1-540 parts per billion, in biological and environmental samples. Read More

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http://dx.doi.org/10.1016/j.bios.2019.03.046DOI Listing
June 2019
3 Reads

The Toxicological Effects of Mercury Exposure in Marine Fish.

Bull Environ Contam Toxicol 2019 Apr 4. Epub 2019 Apr 4.

Key Laboratory of Groundwater Resources and Environment, College of Environment and Resources, Jilin University, Changchun, 130012, Jilin, China.

Since the Minamata incident in Japan, the public have become increasingly aware of the negative health effects caused by mercury pollution in the ocean. Consequently, there has been significant interest in the health of humans eating fish exposed to mercury (Hg). However, the toxicity of mercury to the marine fish themselves has received far less attention. Read More

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http://dx.doi.org/10.1007/s00128-019-02593-2DOI Listing
April 2019
2 Reads

Exposure routes and health effects of heavy metals on children.

Biometals 2019 Apr 2. Epub 2019 Apr 2.

Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, 110 Xiangya Road, Changsha, 410078, China.

Heavy metals are naturally existing elements that have relatively high atomic weight and a minimum density five times the density of water. Heavy metals have extensive applications in industries, homes, agriculture and medicine, leading to their wide distribution in the environment. Most heavy metals are reported to be highly toxic. Read More

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http://dx.doi.org/10.1007/s10534-019-00193-5DOI Listing
April 2019
15 Reads

Chemical Compositions of Metals in Bhasmas and Tibetan Zuotai Are a Major Determinant of Their Therapeutic Effects and Toxicity.

Evid Based Complement Alternat Med 2019 10;2019:1697804. Epub 2019 Jan 10.

Qinghai Key Laboratory of Tibetan Medicine Pharmacology and Safety Evaluation Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China.

Minerals are alchemically processed as Bhasmas in Ayurvedic medicines or as Zuotai in Tibetan medicines. Ayurveda is a knowledge system of longevity and considers the mineral elixir made from "nature" capable of giving humans perpetual life. Herbo-metallic preparations have a long history in the treatment of various diseases in India, China, and around the world. Read More

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http://dx.doi.org/10.1155/2019/1697804DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6421027PMC
January 2019
1 Read

Superoxide Dismutase and Pseudocatalase Increase Tolerance to Hg(II) in Thermus thermophilus HB27 by Maintaining the Reduced Bacillithiol Pool.

MBio 2019 04 2;10(2). Epub 2019 Apr 2.

Department of Biochemistry and Microbiology, Rutgers, the State University of New Jersey, New Brunswick, New Jersey, USA

Mercury (Hg) is a widely distributed, toxic heavy metal with no known cellular role. Mercury toxicity has been linked to the production of reactive oxygen species (ROS), but Hg does not directly perform redox chemistry with oxygen. How exposure to the ionic form, Hg(II), generates ROS is unknown. Read More

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http://dx.doi.org/10.1128/mBio.00183-19DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6445937PMC

Determination of Hg in Farmed and Wild Atlantic Bluefin Tuna ( L. Muscle.

Molecules 2019 Apr 1;24(7). Epub 2019 Apr 1.

Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy.

Mercury (Hg) is a well-known toxic element, diffused in the environment, especially in the Mediterranean Sea which is rich in cinnabar deposits. Mercury bioaccumulation in fish is of great concern, especially for top-level aquatic predators (e.g. Read More

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http://dx.doi.org/10.3390/molecules24071273DOI Listing
April 2019
4 Reads

Reversible alopecia associated with high blood mercury levels and early menopause: a report of two cases.

Menopause 2019 Apr 1. Epub 2019 Apr 1.

The Center for Menopause, Hormonal Disorders & Women's Health, New York, NY.

Objective: The aim of this study was to report on two women in early menopause with alopecia and high mercury (Hg) levels which reversed with a decrease in toxic levels.

Methods: Retrospective chart review and case studies in a reproductive endocrinology practice.

Results: A 43-year-old woman initially evaluated for early menopause later experienced sudden circumscribed hair loss on the scalp. Read More

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http://dx.doi.org/10.1097/GME.0000000000001332DOI Listing
April 2019
1 Read

Insights on alpha lipoic and dihydrolipoic acids as promising scavengers of oxidative stress and possible chelators in mercury toxicology.

J Inorg Biochem 2019 Mar 23;195:111-119. Epub 2019 Mar 23.

Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy.

Alpha lipoic acid (α-LA) and its reduced form dihydrolipoic acid (DHLA) have been historically considered as excellent anti-oxidants and oxidative stress scavengers. Upon oxidation with reactive oxygen species (ROS) and pro-oxidants, α-LA may be reconstituted from DHLA and other reduced forms. Oxidative stress is one of the fundamental causes of functional degeneration, autophagy and apoptosis leading to cytotoxicity and loss of cell survival, often due to exposure to xenobiotics, pollutants, heavy metals, and other environmental and endogenous toxicants. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S01620134183049
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http://dx.doi.org/10.1016/j.jinorgbio.2019.03.019DOI Listing
March 2019
1 Read

Selenium and mercury concentration in drinking water and food samples from a coal mining area in Brazil.

Environ Sci Pollut Res Int 2019 Apr 2. Epub 2019 Apr 2.

Departamento de Química Analítica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Avda Complutense s/n, 28040, Madrid, Spain.

Selenium (Se) is an essential element for human health and can also alleviate the toxicity of elements such as mercury (Hg), which is considered deleterious to health. The study area is an important coal mineral region in Brazil, generating 40% of all Brazilian coal. During the coal mining process, Se and Hg are released, which can induce potential human health risks via the food chain. Read More

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http://dx.doi.org/10.1007/s11356-019-04942-4DOI Listing
April 2019
3 Reads

Impacts of selenium supplementation on soil mercury speciation, and inorganic mercury and methylmercury uptake in rice (Oryza sativa L.).

Environ Pollut 2019 Mar 25;249:647-654. Epub 2019 Mar 25.

State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China. Electronic address:

Rice grain is known to accumulate methylmercury (MeHg) and has been confirmed to be the major pathway of MeHg exposure to residents in mercury (Hg) mining areas in China. Selenium (Se) supplementation has been proven to be effective in mitigating the toxicity of Hg. To understand how Se supplementation influences soil Hg speciation, a wide range of Se (0-500 mg/kg) was applied to Hg polluted paddy soils in this study, which decreased MeHg concentration in soil from 2. Read More

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http://dx.doi.org/10.1016/j.envpol.2019.03.095DOI Listing
March 2019
2 Reads

Preparation of Single-Stranded DNA-Templated Room-Temperature Phosphorescent Quantum Dots and Their Application for Mercury(II) Detection in Environmental and Biological Fluids.

Anal Chem 2019 Apr 3;91(8):5036-5042. Epub 2019 Apr 3.

School of Life Science , Shanxi Normal University , Linfen 041004 , P. R. China.

The direction synthesis of biofunctional nanomaterials with DNA as the template is of high application value. By using phosphorothioate-thymine single-stranded DNA (PS-T-ssDNA) as the template and through synthetic conditions optimization, novel low-toxicity and environment-friendly ssDNA-functionalized room-temperature phosphorescent quantum dots (PS-T-ssDNA RTP QDs) were prepared at low temperature (37 °C). Then, the quantitative RTP-based mercury(II) (Hg) detection was achieved by utilizing the specific identifying ability of T-base-pair Hg (T-Hg-T) and its photoinduced electron transfer. Read More

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http://dx.doi.org/10.1021/acs.analchem.8b05099DOI Listing
April 2019
3 Reads

Identification of Potential Long Noncoding RNA Biomarker of Mercury Compounds in Zebrafish Embryos.

Chem Res Toxicol 2019 Apr 4. Epub 2019 Apr 4.

School of Chemistry and Chemical Engineering , Wuhan University of Science and Technology , Wuhan 430081 , China.

Heavy metal pollution elicits severe environmental concern and health problem worldwide. Mercury is considered as a ubiquitous pollutant due to its versatile application in medicine, industry, and cosmetics. Long noncoding RNAs (lncRNAs) are transcripts greater than 200 nt without protein-encoding function. Read More

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http://dx.doi.org/10.1021/acs.chemrestox.9b00029DOI Listing
April 2019
3 Reads

Rethinking the Dental Amalgam Dilemma: An Integrated Toxicological Approach.

Int J Environ Res Public Health 2019 Mar 22;16(6). Epub 2019 Mar 22.

Department of Biochemistry, School of Medicine, Medical Sciences Campus, University of Puerto Rico, Main Building B210, San Juan 00936, Puerto Rico.

Mercury (Hg) has been identified as one of the most toxic nonradioactive materials known to man. Although mercury is a naturally occurring element, anthropogenic mercury is now a major worldwide concern and is an international priority toxic pollutant. It also comprises one of the primary constituents of dental amalgam fillings. Read More

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http://dx.doi.org/10.3390/ijerph16061036DOI Listing
March 2019
1 Read

Snakes as Novel Biomarkers of Mercury Contamination: A Review.

Rev Environ Contam Toxicol 2019 Mar 17. Epub 2019 Mar 17.

Savannah River Ecology Laboratory, University of Georgia, Aiken, SC, USA.

Mercury (Hg) is an environmental contaminant that has been reported in many wildlife species worldwide. The organic form of Hg bioaccumulates in higher trophic levels, and thus, long-lived predators are at risk for higher Hg exposure. Although ecological risk assessments for contaminants such as Hg include pertinent receptor species, snakes are rarely considered, despite their high trophic status and potential to accumulate high levels of Hg. Read More

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http://link.springer.com/10.1007/398_2019_26
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http://dx.doi.org/10.1007/398_2019_26DOI Listing
March 2019
9 Reads

Insights into the Potential Role of Mercury in Alzheimer's Disease.

J Mol Neurosci 2019 Apr 15;67(4):511-533. Epub 2019 Mar 15.

Research Department, Innlandet Hospital Trust, Brumunddal, Norway.

Mercury (Hg), which is a non-essential element, is considered a highly toxic pollutant for biological systems even when present at trace levels. Elevated Hg exposure with the growing release of atmospheric pollutant Hg and rising accumulations of mono-methylmercury (highly neurotoxic) in seafood products have increased its toxic potential for humans. This review aims to highlight the potential relationship between Hg exposure and Alzheimer's disease (AD), based on the existing literature in the field. Read More

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http://dx.doi.org/10.1007/s12031-019-01274-3DOI Listing
April 2019
1 Read
2.343 Impact Factor

Photocatalytic Degradation of Azithromycin by Nanostructured TiO₂ Film: Kinetics, Degradation Products, and Toxicity.

Materials (Basel) 2019 Mar 15;12(6). Epub 2019 Mar 15.

Department of Analytical Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia.

In this paper, nanostructured TiO₂ film was prepared by the by sol-gel process and dip-coating technique with titanium tetraisopropoxide as a precursor. After heat treatment at 550 °C, the deposited film was characterized by means of micro-Raman spectroscopy and atomic force microscopy (AFM). It was found that the TiO₂ film consisted of only the TiO₂ anatase phase and showed a granular microstructure. Read More

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http://dx.doi.org/10.3390/ma12060873DOI Listing
March 2019
1 Read

Development of marine water quality criteria for inorganic mercury in China based on the retrievable toxicity data and a comparison with relevant criteria or guidelines.

Ecotoxicology 2019 Mar 14. Epub 2019 Mar 14.

Second Institute of Oceanography, Ministry of Natural Resources, No. 36, Baochu North Road, Hangzhou, 310012, China.

The development of marine water quality criteria (WQC) in China has been insufficient because data on the toxicity of pollutants for marine organisms based on the species sensitivity distribution (SSD) method are lacking. The Chinese aquatic environmental quality standards, including those for seawater, were derived from the developed countries. Therefore, establishing Chinese marine WQC is crucial for identifying the sensitivity of marine species in China and will improve their protection from threats. Read More

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http://dx.doi.org/10.1007/s10646-019-02032-2DOI Listing
March 2019
1 Read

Speciation Analysis of Trace Arsenic, Mercury, Selenium and Antimony in Environmental and Biological Samples Based on Hyphenated Techniques.

Molecules 2019 Mar 7;24(5). Epub 2019 Mar 7.

Tianjin Key Laboratory of Marine Resources and Chemistry, College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, Tianjin 300457, China.

In order to obtain a well understanding of the toxicity and ecological effects of trace elements in the environment, it is necessary to determine not only the total amount, but also their existing species. Speciation analysis has become increasingly important in making risk assessments of toxic elements since the toxicity and bioavailability strongly depend on their chemical forms. Effective separation of different species in combination with highly sensitive detectors to quantify these particular species is indispensable to meet this requirement. Read More

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http://dx.doi.org/10.3390/molecules24050926DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6429259PMC
March 2019
4 Reads

Fluorescent organic nanoparticles (FONs) as convenient probes for metal ion detection in aqueous medium.

Analyst 2019 Apr;144(8):2480-2497

Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan.

Recently, water contamination caused by metal ions has become one of the most serious problems as it has caused several deaths and socioeconomic problems around the world. Hence, the fast and accurate detection of metal ions in aqueous media has become the most important area of research; from time to time, new probes have been designed for this purpose. Among the previously reported sensors, probes based on fluorescent organic nanoparticles (FONs) have been gaining tremendous attention due to their ease of preparation/fabrication, synthetic diversity according to targeted metal ions, quick response, high selectivity toward different analytes at lower concentrations, tenable optical properties, and less toxicity. Read More

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http://dx.doi.org/10.1039/c8an01801dDOI Listing
April 2019
3 Reads

Developmental exposure to mercury chloride impairs social behavior in male offspring dependent on genetic background and maternal autoimmune environment.

Toxicol Appl Pharmacol 2019 May 9;370:1-13. Epub 2019 Mar 9.

School of Public Health and Key Laboratory of Public Health Safety, MOE, Fudan University, Shanghai 200032, China. Electronic address:

To date, the connection between inorganic mercury (Hg) and social behavior remains incompletely understood. The aim of this study was to investigate the influence of maternal autoimmunity by inorganic Hg (Hg) exposure on social behavior of offspring. Wild-type (WT) and immunoglobulin deficient (Ig) B10. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S0041008X193008
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http://dx.doi.org/10.1016/j.taap.2019.03.006DOI Listing
May 2019
5 Reads
3.705 Impact Factor

The protective role of ascorbic acid in the hepatotoxicity of cadmium and mercury in rabbits.

Environ Sci Pollut Res Int 2019 Mar 9. Epub 2019 Mar 9.

Department of Zoology, University of the Punjab, Lahore, Pakistan.

The liver is one of the vital and sensitive organs which are usually exposed against the toxicity of mercury (Hg) and cadmium (Cd). The main objective of the current study was to evaluate the potential toxicological effects of both Cd and Hg as individual and combined. Hepatotoxicity was evaluated by monitoring the biochemical parameters of the liver and their accumulation in the liver as well as therapeutic role of vitamin C in said toxicity in rabbits (Oryctolagus cuniculus). Read More

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http://link.springer.com/10.1007/s11356-019-04620-5
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http://dx.doi.org/10.1007/s11356-019-04620-5DOI Listing
March 2019
2 Reads
2.828 Impact Factor

Plant components can reduce methylmercury toxication: A mini-review.

Biochim Biophys Acta Gen Subj 2019 Mar 6. Epub 2019 Mar 6.

Department of Preventive Medicine and Public Health Laboratory Sciences, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu 212013, China; Center for Experimental Research, Affiliated Kunshan Hospital to Jiangsu University, Zhenjiang, Jiangsu 212013, China. Electronic address:

Background: Methylmercury (MeHg) is a ubiquitous environmental pollutant, with the nervous system as its main target; however, the neurotoxic mechanisms of MeHg have not been fully elucidated, and no effective therapeutic and preventive drugs are available to mitigate its toxicity. Recent evidence suggests a reduction in the toxicity of MeHg by natural plant extracts.

Scope Of Review: The aim of this review is to provide an overview of effective natural plant extracts and their putative biochemical mechanisms for blocking gut absorption, enhancing excretion and minimizing toxic effects of MeHg. Read More

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http://dx.doi.org/10.1016/j.bbagen.2019.01.012DOI Listing
March 2019
1 Read

Methylmercury-induced neural degeneration in rat dorsal root ganglion is associated with the accumulation of microglia/macrophages and the proliferation of Schwann cells.

J Toxicol Sci 2019 ;44(3):191-199

Department of Environmental Health, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences.

Exposure to organic mercury, especially methylmercury (MeHg), causes Minamata disease, a severe chronic neurological disorder. Minamata disease predominantly affects the central nervous system, and therefore, studies on the mechanisms of MeHg neurotoxicity have focused primarily on the brain. Although the peripheral nervous system is also affected by the organometallic compound and shows signs of neural degeneration, the mechanisms of peripheral MeHg neurotoxicity remain unclear. Read More

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http://dx.doi.org/10.2131/jts.44.191DOI Listing
March 2019
1 Read

A Review of Heavy Metal Contamination of Food Crops in Nigeria.

Ann Glob Health 2018 Aug 31;84(3):488-494. Epub 2018 Aug 31.

Department of Family Medicine, Irrua Specialist Teaching Hospital, NG.

Heavy metal contamination of food crops is an issue of global concern that ultimately results in toxicity and diseases in humans and animals through consumption of contaminated soils and food crops. With a population of 182 million people, Nigeria is regarded as the most populous country in Africa. The people suffer environmental pollution from high levels of heavy metal accumulation in the environment and in food crops. Read More

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http://dx.doi.org/10.29024/aogh.2314DOI Listing
August 2018
4 Reads

Unusual complication of an Alaskan cruise: thinking outside the box.

BMJ Case Rep 2019 Feb 26;12(2). Epub 2019 Feb 26.

Department of Medicine/Nephrology, University of Florida, Gainesville, Florida, USA.

A 69-year-old man with a medical history of hypertension and diabetes presented with altered mental status once he returned from a 14-day Alaskan cruise. An extensive workup for stroke was negative. His physical examination was normal without any focal motor deficits, but he had developed memory loss and paresthesia. Read More

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http://dx.doi.org/10.1136/bcr-2018-227727DOI Listing
February 2019
3 Reads

The interactive effects of stratospheric ozone depletion, UV radiation, and climate change on aquatic ecosystems.

Photochem Photobiol Sci 2019 Mar 27;18(3):717-746. Epub 2019 Feb 27.

CIESIN, Columbia University, New Hartford, Connecticut, USA.

This assessment summarises the current state of knowledge on the interactive effects of ozone depletion and climate change on aquatic ecosystems, focusing on how these affect exposures to UV radiation in both inland and oceanic waters. The ways in which stratospheric ozone depletion is directly altering climate in the southern hemisphere and the consequent extensive effects on aquatic ecosystems are also addressed. The primary objective is to synthesise novel findings over the past four years in the context of the existing understanding of ecosystem response to UV radiation and the interactive effects of climate change. Read More

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http://xlink.rsc.org/?DOI=C8PP90062K
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http://dx.doi.org/10.1039/c8pp90062kDOI Listing
March 2019
11 Reads

Large Circular Plasmids from Groundwater Plasmidomes Span Multiple Incompatibility Groups and Are Enriched in Multimetal Resistance Genes.

MBio 2019 02 26;10(1). Epub 2019 Feb 26.

Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, California, USA

Naturally occurring plasmids constitute a major category of mobile genetic elements responsible for harboring and transferring genes important in survival and fitness. A targeted evaluation of plasmidomes can reveal unique adaptations required by microbial communities. We developed a model system to optimize plasmid DNA isolation procedures targeted to groundwater samples which are typically characterized by low cell density (and likely variations in the plasmid size and copy numbers). Read More

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http://dx.doi.org/10.1128/mBio.02899-18DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6391923PMC
February 2019
3 Reads
6.786 Impact Factor

Critical mercury concentration in tropical soils: Impact on plants and soil biological attributes.

Sci Total Environ 2019 May 14;666:472-479. Epub 2019 Feb 14.

Departamento de Ciência do Solo, Universidade Federal de Lavras, Lavras 37200-000, Minas Gerais State, Brazil. Electronic address:

Mercury is a toxic element that becomes a problem when present at high concentrations in soils. Mercury toxicity in soils varies depending on chemical species, concentration, exposure routes, and organism vulnerability. There is little information regarding the toxicity of Hg in tropical soils, especially for establishing safe levels of this pollutant. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2019.02.216DOI Listing
May 2019
2 Reads

Using Proales similis (Rotifera) for toxicity assessment in marine waters.

Environ Toxicol 2019 May 25;34(5):634-644. Epub 2019 Feb 25.

School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia.

There is a need to develop more animal species for assessing toxicity in marine environments. Cyst-based toxicity tests using invertebrates are especially fast, technically simple, cost-effective, and sensitive to a variety of toxicants. Over the past 30 years, a variety of toxicity endpoints have been measured using the marine rotifer Brachionus plicatilis hatched from cysts, including mortality, reproduction, ingestion, swimming, enzyme activity, and gene expression. Read More

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http://dx.doi.org/10.1002/tox.22729DOI Listing
May 2019
1 Read

Effect of UV wavelength on humic acid degradation and disinfection by-product formation during the UV/chlorine process.

Water Res 2019 Feb 12;154:199-209. Epub 2019 Feb 12.

State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, PR China.

The efficiency of the ultraviolet (UV)/chlorine process strongly depends on UV wavelength because chlorine photolysis and its subsequent radical formation are highly wavelength-dependent. This study compared the degradation of humic acid (HA) during the UV/chlorine process by low pressure mercury lamp (LPUV, 254 nm) and ultraviolet light-emitting diode (UV-LED, 275 and 310 nm). The results indicated that HA degradation followed the pseudo-first-order kinetics, and the fluence-based degradation rate constants (k) were significantly affected by UV wavelength and solution pH. Read More

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http://dx.doi.org/10.1016/j.watres.2019.02.004DOI Listing
February 2019

Mercury Exposure and Poor Nutritional Status Reduce Response to Six Expanded Program on Immunization Vaccines in Children: An Observational Cohort Study of Communities Affected by Gold Mining in the Peruvian Amazon.

Int J Environ Res Public Health 2019 Feb 21;16(4). Epub 2019 Feb 21.

Nicholas School of the Environment, Duke University, Durham, NC 27710, USA.

Poor nutritional status combined with mercury exposure can generate adverse child health outcomes. Diet is a mediator of mercury exposure and evidence suggests that nutritional status modifies aspects of mercury toxicity. However, health impacts beyond the nervous system are poorly understood. Read More

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http://dx.doi.org/10.3390/ijerph16040638DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6406457PMC
February 2019
1 Read

Environmental impacts of the life cycle of alluvial gold mining in the Peruvian Amazon rainforest.

Sci Total Environ 2019 Apr 23;662:940-951. Epub 2019 Jan 23.

Peruvian Life Cycle Network (PELCAN), Department of Engineering, Pontificia Universidad Católica del Perú, Av. Universitaria 1801 San Miguel, 15088 Lima, Peru.

Alluvial gold mining activities in the Peruvian Amazon rainforest are responsible for mercury emissions and deforestation. To understand related environmental impacts, specifically toxicity and climate change, this study uses Life Cycle Assessment methodology. Four predominant extraction systems were selected and modelled and three scenarios that reflect currently available gold recovery systems were modelled: amalgamation, amalgamation with mercury recovery through retort system and gravimetric tables. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2019.01.246DOI Listing
April 2019
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Identifying contaminants of potential concern in remote headwater streams of Tennessee's Appalachian Mountains.

Environ Monit Assess 2019 Feb 20;191(3):176. Epub 2019 Feb 20.

Department of Biology, Middle Tennessee State University, Murfreesboro, TN, 37132, USA.

The susceptibility of Tennessee's Appalachian Mountains to anthropogenic stressors has remained largely uninvestigated likely due to a lack of known point source contamination. However, a growing body of scientific evidence suggests that depositional inputs can lead to concerning levels of contamination, even in remote areas. To investigate potential concerns, water quality parameters, contaminants in water (nitrogen, TSS, and metals), and contaminants in eastern brook trout (mercury, polychlorinated biphenyls [PCBs], organochlorine [OC] pesticides, dioxins, furans, and phthalates) were measured in four Appalachian Mountain streams from 2015 to 2017. Read More

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http://dx.doi.org/10.1007/s10661-019-7305-7DOI Listing
February 2019
2 Reads

Effects of temperature and SO on re-emission of mercury from activated carbon under flue gas conditions.

J Environ Sci (China) 2019 May 30;79:67-73. Epub 2018 Oct 30.

Department of Chemical Engineering, University of South Carolina, 541 Main St., Columbia, SC 29201, USA. Electronic address:

Mercury (Hg) is a toxic and bio-accumulating heavy metal that is predominantly released via the combustion of coal. Due to its toxicity, the Environmental Protection Agency (EPA) has introduced Mercury and Air Toxics Standards (MATS) Rule regarding allowable Hg emissions. In order to reduce emissions, power plants have widely adopted activated carbon (AC) injection. Read More

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http://dx.doi.org/10.1016/j.jes.2018.10.012DOI Listing

Proteome changes in methylmercury-exposed mouse primary cerebellar granule neurons and astrocytes.

Toxicol In Vitro 2019 Jun 15;57:96-104. Epub 2019 Feb 15.

Department of Biology, University of Ottawa, Canada. Electronic address:

Methylmercury (MeHg) is a neurotoxicant, with the cerebellum as the main target of toxicity; however, the toxic effects of MeHg on specific cell types remain unclear. Here, primary cerebellar granule neurons (CGNs) and cerebellar astrocytes were isolated and analyzed for total mercury accumulation, cellular reactive oxygen species (ROS) production, and whole-cell proteome expression after exposure to 0-10 μM MeHg for 24 h. Intracellular mercury and ROS levels showed dose-dependent increases. Read More

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http://dx.doi.org/10.1016/j.tiv.2019.02.013DOI Listing
June 2019
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Oleanolic acid 3-glucoside, a synthetic oleanane-type saponin, alleviates methylmercury toxicity in vitro and in vivo.

Toxicology 2019 Apr 15;417:15-22. Epub 2019 Feb 15.

School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan. Electronic address:

Methylmercury (MeHg) is one of the most toxic environmental pollutants, presenting a serious health hazard worldwide. In this study, we examined the potential of derivatives of oleanolic acid (OA), such as OA 3-glucoside, OA 28-glucoside, and OA 3,28-diglucoside, to mitigate MeHg toxicity in vitro and in vivo. We found that OA 3-glucoside suppressed the cellular MeHg uptake by 63. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S0300483X183027
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http://dx.doi.org/10.1016/j.tox.2019.02.006DOI Listing
April 2019
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Mercury levels and genotoxic effect in caimans from tropical ecosystems impacted by gold mining.

Sci Total Environ 2019 May 28;664:899-907. Epub 2019 Jan 28.

Environmental Chemistry Department, Institute of Environmental Assessment and Water Research, IDAEA-CSIC, E-08034 Barcelona, Spain. Electronic address:

One of the most representative predator species in tropical ecosystems is caiman that can provide relevant information about the impact of mercury (Hg) associated with artisanal and small-scale gold mining. To evaluate the degree to which adverse effects are likely to occur in Caiman crocodilus, total Hg (THg) concentrations in different tissues and DNA damage in erythrocytes were determined. Samples of claws, scutes, and blood were taken from 65 specimens in sites impacted by upstream gold mining, and in a crocodile breeding center as control site, located in a floodplain in northern Colombia. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S00489697193038
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http://dx.doi.org/10.1016/j.scitotenv.2019.01.340DOI Listing
May 2019
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A multidimensional concept for mercury neuronal and sensory toxicity in fish - From toxicokinetics and biochemistry to morphometry and behavior.

Biochim Biophys Acta Gen Subj 2019 Feb 12. Epub 2019 Feb 12.

Department of Biology and CESAM, University of Aveiro, Aveiro 3810-193, Portugal. Electronic address:

Background: Neuronal and sensory toxicity of mercury (Hg) compounds has been largely investigated in humans/mammals with a focus on public health, while research in fish is less prolific and dispersed by different species. Well-established premises for mammals have been governing fish research, but some contradictory findings suggest that knowledge translation between these animal groups needs prudence [e.g. Read More

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http://dx.doi.org/10.1016/j.bbagen.2019.01.020DOI Listing
February 2019
1 Read
4.381 Impact Factor

Phosphonium-based Ionic Liquid Modified Activated Carbon from Mixed Recyclable Waste for Mercury(II) Uptake.

Molecules 2019 Feb 5;24(3). Epub 2019 Feb 5.

Advanced Materials Research Chair, Chemistry Department P. O. Box 2455, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.

The contamination of water surfaces by mercury is a dangerous environmental problem due to its toxicity, which leads kidney damage. Activated carbon from mixed recyclable waste modified by phosphonium-based ionic liquid (IL-ACMRW) was therefore prepared and evaluated for Hg(II) remediation. The activated carbon used in this study was prepared from mixed waste, including cardboard, papers and palm wastes as cheap raw materials. Read More

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http://dx.doi.org/10.3390/molecules24030570DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6384760PMC
February 2019
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Mercury accumulation, speciation, and temporal trends in Atlantic Stingrays (Hypanus sabinus).

Ecotoxicology 2019 Apr 13;28(3):251-260. Epub 2019 Feb 13.

Department of Biological Sciences and Advanced Environmental Research Institute, University of North Texas, Denton, TX, USA.

Mercury (Hg) deposited into aquatic sediments can be converted into the more toxic methylmercury (MeHg) by microbial activity. Atlantic stingrays (Hypanus sabinus) are an estuarine and nearshore species found in coastal regions of the western North Atlantic, occurring in multiple habitat types, and feeding mainly on benthic invertebrates. Mercury dynamics and speciation in stingrays have not been well examined. Read More

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http://link.springer.com/10.1007/s10646-018-02014-w
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http://dx.doi.org/10.1007/s10646-018-02014-wDOI Listing
April 2019
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Heavy metal pollution and potential health risks of commercially available Chinese herbal medicines.

Sci Total Environ 2019 Feb 30;653:748-757. Epub 2018 Oct 30.

Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.

A survey was conducted to investigate the pollution and health risks of copper (Cu), cadmium (Cd), lead (Pb), arsenic (As), mercury (Hg) and zinc (Zn) in 60 Chinese herbal medicines (CHMs) collected from a market in Kunming City, Yunnan Province, China. Furthermore, eight CHMs (Cyathulae radix, Drynariae rhizoma, Peucedani radix, Homalomenae rhizoma, Dryopteris setosa, Polygonati rhizoma, Lilii bulbus, and Linderae radix) containing high Cd concentrations were selected to further analyse their Cd chemical forms. Additionally, the dissolution rates of six heavy metals in decoction liquid were also analysed for four CHMs (Typhonii rhizoma, Linderae radix, Homalomenae rhizoma, and Cyathulae radix), and the health risks of heavy metals in CHMs were evaluated. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2018.10.388DOI Listing
February 2019
1 Read
4.099 Impact Factor

Human Biological Monitoring of Mercury Through Hair Samples in China.

Bull Environ Contam Toxicol 2019 Feb 9. Epub 2019 Feb 9.

CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, and HKU-IHEP Joint Laboratory on Metallomics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.

Mercury (Hg) is a global pollutant that affects environmental and human health. Considering the high toxicity of Hg, it is required to assess the exposure of Hg in human body for appropriate risk management. In this review paper, we summarized data obtained through regional and small-scaled human biomonitoring (HBM) program for Hg in hair samples in China, which can deliver scientific data to make decisions on environmental health policy. Read More

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http://dx.doi.org/10.1007/s00128-019-02563-8DOI Listing
February 2019
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Species and correlations between selenium and mercury in fishpond ecosystems.

Water Environ Res 2019 Apr 8;91(4):292-299. Epub 2019 Feb 8.

Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin, China.

The chemical species and contents of selenium and mercury in water, sediments, and crucian carps collected from three wild and three aquaculture fishponds in Tianjin, China, were determined, and the interaction between selenium and mercury in water was also investigated by the calorimetry method. The results revealed that the average contents of total selenium (TSe) and total mercury (THg) in each item of the wild areas were higher than in those of the aquaculture areas, and significant differences (95% confidence) were presented for THg both in the sediments and crucian carps. The molar ratios between TSe and THg in all investigated fishponds were far higher than 1, indicating good protective effects of selenium on mercury toxicity. Read More

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http://doi.wiley.com/10.1002/wer.1029
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http://dx.doi.org/10.1002/wer.1029DOI Listing
April 2019
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The relationship between mercury exposure and epigenetic alterations regarding human health, risk assessment and diagnostic strategies.

J Trace Elem Med Biol 2019 Mar 14;52:37-47. Epub 2018 Nov 14.

Toxicology and Diseases Group, The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences (TUMS), Tehran, Iran; Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran. Electronic address:

Background: Exposure to the environmental toxicants poses a serious threat to human health. The extent of exposure and the development of diseases are interrelated with each other. Chronic exposure to mercury (Hg) increases the risk of developing serious human disorders from embryo to adulthood. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S0946672X183046
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http://dx.doi.org/10.1016/j.jtemb.2018.11.006DOI Listing
March 2019
9 Reads
2.491 Impact Factor

Assessment of potential mercury toxicity to native invertebrates in a high-gradient stream.

Integr Environ Assess Manag 2019 Feb 6. Epub 2019 Feb 6.

DuPont Corporate Remediation Group, Wilmington, Delaware, USA.

This study evaluated potential effects of mercury (Hg) on benthic macroinvertebrates in the South River, Virginia, USA. The study used a multiple lines of evidence approach, including spatially and temporally matched sediment chemistry, biological, and toxicological information (Sediment Quality Triad), exposure and effect analysis in bulk and interstitial sediment and interstitial water, and critical body residue analysis. Ten-day Chironomus dilutus and Hyalella azteca toxicity tests established site-specific no-effect concentrations (NOEC) at 18. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/ieam.4133
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http://dx.doi.org/10.1002/ieam.4133DOI Listing
February 2019
12 Reads