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Journal articles on the topic 'IHg/MeHg'

Author: Grafiati

Published: 30 June 2023

Last updated: 31 July 2025

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1

Beauvais-Flück, Rebecca, Vera Slaveykova, and Claudia Cosio. "Molecular Effects of Inorganic and Methyl Mercury in Aquatic Primary Producers: Comparing Impact to A Macrophyte and A Green Microalga in Controlled Conditions." Geosciences 8, no. 11 (2018): 393. http://dx.doi.org/10.3390/geosciences8110393.

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Mercury (Hg) remains hazardous in aquatic environments, because of its toxicity and high biomagnification in food webs. In phytoplankton and macrophytes, Hg compounds at high concentration have been reported to affect the growth, photosynthesis, and nutrient metabolism, as well as to induce oxidative stress and damage. Here, we reviewed the recent knowledge gained on cellular toxicity of inorganic and methyl Hg (IHg; MeHg) in aquatic primary producers at more relevant environmental concentrations, with a particular focus on omics data. In addition, we compared a case study conducted with trans

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2

Regnell, Olof, Tommy Hammar, Anders Helgée, and Bo Troedsson. "Effects of anoxia and sulfide on concentrations of total and methyl mercury in sediment and water in two Hg-polluted lakes." Canadian Journal of Fisheries and Aquatic Sciences 58, no. 3 (2001): 506–17. http://dx.doi.org/10.1139/f01-001.

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Between May and December 1996, monthly samples of surface sediment (01 cm), settling matter, and water were taken at a shallow site and a deep site in each of two consecutive Hg-polluted riverine lakes. In the upper lake, the sediment was polluted also with cellulose fiber. Both hypolimnia turned anoxic, but sulfide was detected only in the upper lake. When sulfide appeared, hypolimnetic methyl mercury (MeHg) increased and reached 47 pM (9.4 ng·L1), whereas MeHg in the sediment below decreased. The increase in hypolimnetic inorganic Hg (IHg = total Hg MeHg), which reached a peak of 40 pM (

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3

Iwai-Shimada, Miyuki, Yayoi Kobayashi, Tomohiko Isobe, et al. "Comparison of Simultaneous Quantitative Analysis of Methylmercury and Inorganic Mercury in Cord Blood Using LC-ICP-MS and LC-CVAFS: The Pilot Study of the Japan Environment and Children’s Study." Toxics 9, no. 4 (2021): 82. http://dx.doi.org/10.3390/toxics9040082.

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Prenatal exposure to methylmercury (MeHg) affects child development after birth. However, many epidemiological studies have evaluated total mercury levels without analyzing speciation. Biomonitoring of MeHg and inorganic mercury (IHg) is essential to reveal each exposure level. In this study, we compared a high-throughput analysis for mercury speciation in blood using liquid chromatography-inductively coupled plasma-mass spectrometry (LC-ICP-MS) and liquid chromatography-cold vapor atomic fluorescence spectrometry (LC-CVAFS). The validated LC-ICP-MS method was applied to 101 maternal blood and

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4

Li, Yunyun, Jiating Zhao, Yu-Feng Li, et al. "Comparative metalloproteomic approaches for the investigation proteins involved in the toxicity of inorganic and organic forms of mercury in rice (Oryza sativa L.) roots." Metallomics 8, no. 7 (2016): 663–71. http://dx.doi.org/10.1039/c5mt00264h.

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5

Han, Jialiang, Zhuo Chen, Jian Pang, Longchao Liang, Xuelu Fan, and Qiuhua Li. "Health Risk Assessment of Inorganic Mercury and Methylmercury via Rice Consumption in the Urban City of Guiyang, Southwest China." International Journal of Environmental Research and Public Health 16, no. 2 (2019): 216. http://dx.doi.org/10.3390/ijerph16020216.

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Rice consumption is the main methylmercury (MeHg) exposure route for residents in mercury (Hg) mining areas. However, there is limited studies on mercury in commercial rice, which has high liquidity and can be directly consumed by urban residents. This study measured the total Hg (THg) and MeHg concentrations in 146 rice samples purchased from the markets in Guiyang city, southwest China, and both the inorganic Hg (IHg) and MeHg estimated daily intakes (EDIs) and hazard quotients (HQs) were calculated according to rice consumption. The THg concentrations in all rice samples (range: 0.97 to 13.

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6

Nunes, Paula Beatriz de Oliveira, Maria Karolina Martins Ferreira, Deborah Ribeiro Frazão, et al. "Effects of inorganic mercury exposure in the alveolar bone of rats: an approach of qualitative and morphological aspects." PeerJ 10 (January 26, 2022): e12573. http://dx.doi.org/10.7717/peerj.12573.

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Background In comparison to organic mercury (MeHg), the environmental inorganic mercury (IHg) can be found in some skin-lightening cosmestics were considered “harmless” for a long time. However, recent studies have shown that long-term exposure to low doses of IHg may affect biological systems. Therefore, this study investigated the effects of IHg long-term exposure to the alveolar bone of adult rats. Methods Adult Wistar rats were distributed in control and HgCl2 exposed (0.375 mg/kg/day). After 45 days, the rats were euthanized and both blood and hemimandibles were collected. Total blood Hg

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7

Zhao, Lei, Christopher W. N. Anderson, Guangle Qiu, Bo Meng, Dingyong Wang, and Xinbin Feng. "Mercury methylation in paddy soil: source and distribution of mercury species at a Hg mining area, Guizhou Province, China." Biogeosciences 13, no. 8 (2016): 2429–40. http://dx.doi.org/10.5194/bg-13-2429-2016.

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Abstract. Rice paddy plantation is the dominant agricultural land use throughout Asia. Rice paddy fields have been identified as important sites for methylmercury (MeHg) production in the terrestrial ecosystem and a primary pathway of MeHg exposure to humans in mercury (Hg) mining areas. We compared the source and distribution of Hg species in different compartments of the rice paddy during a complete rice-growing season at two different typical Hg-contaminated mining sites in Guizhou province, China: an abandoned site with a high Hg concentration in soil but a low concentration in the atmosph

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8

Regnell, O., and T. Hammar. "Coupling of methyl and total mercury in a minerotrophic peat bog in southeastern Sweden." Canadian Journal of Fisheries and Aquatic Sciences 61, no. 10 (2004): 2014–23. http://dx.doi.org/10.1139/f04-143.

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During most of an annual cycle, we studied the temporal variation of total mercury (HgT) and methyl mercury (MeHg) in unfiltered and filtered (0.45 µ) peat water from a minerotrophic peat bog in southeastern Sweden. MeHg in bulk water ([MeHgT]) and total Hg in filtered water in discharge water from the peat bog ([HgD]) were an order of magnitude higher than in upland runoff water entering the peat bog. At the discharge end, peat-water [HgD] and [MeHgD] ranged from 8 to 54 pmol·L1 and from 1 to 32 pmol·L1, respectively. Whereas the variation of [MeHgT] was explained by changes in [MeHgD], the

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9

Magnuson, Jason T., and Mark B. Sandheinrich. "Relation among Mercury, Selenium, and Biomarkers of Oxidative Stress in Northern Pike (Esox lucius)." Toxics 11, no. 3 (2023): 244. http://dx.doi.org/10.3390/toxics11030244.

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Mercury (Hg) is a toxic environmental contaminant associated with oxidative stress in freshwater fish. A known antagonist to Hg, selenium (Se), may reduce the toxic effects of Hg. In this study, the relation among Se, methylmercury (MeHg), inorganic mercury (IHg), total mercury (THg), and the expression of biomarkers of oxidative stress and metal regulation in livers of northern pike were examined. Livers from northern pike were collected from 12 lakes in Isle Royale National Park, Pictured Rocks National Lakeshore, Sleeping Bear Dunes National Lakeshore, and Voyageurs National Park. The conce

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10

Rohmaniati, Baiq Siti, Sukartono Sukartono, Fahrudin Fahrudin, I. Gusti Made Kusnarta, and Lolita Endang Susilowati. "Pemanfaatan Biochar dan Respon Pertumbuhan Tanaman Sawi Hijau (Brasicca juncea L) pada Tanah Tercemar Merkuri (Hg)." JURNAL SAINS TEKNOLOGI & LINGKUNGAN 9, no. 3 (2023): 551–62. http://dx.doi.org/10.29303/jstl.v9i3.491.

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This study aims to determine the potential of biochar on the mobility of mercury (Hg) in polluted soil planted with mustard greens (Brasicca juncea) and to determine the growth response of mustard greens (Brasicca juncea) in absorbing mercury (Hg). This study used the experimental method, which is a method that aims to examine the effect of biochar application at various doses on the mobility of mercury using the indicator plant mustard greens (Brasicca juncea L) in mercury (Hg) polluted soil. This experiment was carried out from March to June 2023 in the Greenhouse of the Faculty of Agricultu

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11

Takanezawa, Yasukazu, Kouhei Ishikawa, Shunsuke Nakayama, et al. "Conversion of methylmercury into inorganic mercury via organomercurial lyase (MerB) activates autophagy and aggresome formation." Scientific Reports 13, no. 1 (2023). http://dx.doi.org/10.1038/s41598-023-47110-y.

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AbstractMethylmercury (MeHg) is converted to inorganic mercury (iHg) in several organs; however, its impact on tissues and cells remains poorly understood. Previously, we established a bacterial organomercury lyase (MerB)-expressing mammalian cell line to overcome the low cell permeability of iHg and investigate its effects. Here, we elucidated the cytotoxic effects of the resultant iHg on autophagy and deciphered their relationship. Treatment of MerB-expressing cells with MeHg significantly increases the mRNA and protein levels of LC3B and p62, which are involved in autophagosome formation an

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12

Cho, Moonkyoung, Seunghan Lee, Kang Woong Kim, et al. "Selenium induces mercury isotope fractionation and detoxification in marine fish." Environmental Toxicology and Chemistry, January 6, 2025. https://doi.org/10.1093/etojnl/vgae026.

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Abstract Prey fish are vital in transferring nutrients and contaminants from lower to higher trophic levels. Although the role of selenium (Se) on mercury (Hg) detoxification has been identified in marine mammals and seabirds, the metabolic pathways of Hg-Se interaction in fish remain unknown. We used Hg stable isotopes (δ202Hg, Δ199Hg) to characterize the internal dynamics of methylmercury (MeHg) and inorganic Hg (IHg) in the presence and absence of Se in juvenile olive flounders (Paralichthys olivaceus). The fish were exposed to MeHg- (1,223 ng/g, n = 31) and IHg-amended (1,515 ng/g, n = 31)

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13

Yin, Lei, Simon Lin, Anne O. Summers, Van Roper, Matthew J. Campen, and Xiaozhong Yu. "Children with amalgam dental restorations have significantly elevated blood and urine mercury levels." Toxicological Sciences, August 28, 2021. http://dx.doi.org/10.1093/toxsci/kfab108.

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Abstract Human exposure to organic mercury (Hg) as methylmercury (MeHg) from seafood consumption is widely considered a health risk because pure methylmercury is extremely neurotoxic. In contrast, the clinical significance of Hg exposure from amalgam (AMG) dental restorations, the only other major non-occupational source of Hg exposure, has long been debated. Here we examined data from the two most recent National Health and Nutrition Examination Surveys (NHANES) on 14,181 subjects to assess the contributions of seafood consumption versus AMG to blood total mercury (THg), inorganic mercury (IH

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14

Sun, Ting, Zoë Lindo, and Brian A. Branfireun. "Ground warming releases inorganic mercury and increases net methylmercury production in two boreal peatland types." Frontiers in Environmental Science 11 (April 14, 2023). http://dx.doi.org/10.3389/fenvs.2023.1100443.

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Boreal peatlands are considered sinks for atmospheric mercury (Hg) and are important sources of methylmercury (MeHg) to downstream ecosystems. Climate change-driven increases in average annual temperature in coming decades will be amplified at higher latitudes and will modify many biogeochemical processes in high boreal and subarctic peatlands that are important landscape features in these regions. Changes in water quality are an important issue for Northern ecosystems and fish consumers, and the directionality of changes in mercury levels due to climate warming presents considerable uncertain

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15

Appel, Aleah. "Mercury Contamination of Arctic Spiders and Insects." Boller Review 8 (March 29, 2025). https://doi.org/10.18776/tcu/br/8/196.

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Mercury (Hg) is a contaminant of global concern because of its potential to biomagnify in food webs and cause adverse health effects in humans and wildlife. Mercury emitted in temperate and tropical regions can be transported to the Arctic where it is deposited across the landscape. After reaching aquatic systems, inorganic forms of Hg (IHg) can be methylated to the toxic and bioaccumulative form, methylmercury (MeHg). The High Arctic of Greenland comprises many low-lying aquatic ecosystems, primarily characterized by permafrost and snowmelt ponds and wetlands. Insects and their spider predato

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16

Strickman, R. J., S. Larson, Y. Farhat, V. A. T. Hoang, S. E. Rothenberg, and R. B. Neumann. "Effects of Elevated CO2 on MeHg and IHg in Rice." Environmental Advances, March 2024, 100515. http://dx.doi.org/10.1016/j.envadv.2024.100515.

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17

Pinzone, Marianna, Alice Cransveld, Gudrun De Boeck, et al. "Dynamics of Dietary Mercury Determined by Mercury Speciation and Isotopic Composition in Dicentrarchus labrax." Frontiers in Environmental Chemistry 3 (February 14, 2022). http://dx.doi.org/10.3389/fenvc.2022.767202.

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Seafood has a great ecological and nutritional value for human and wildlife communities. However, accumulation of mercury (Hg) in fish is a concern to animal and human health. There is a crucial need to understand Hg speciation in marine organisms through controlled feeding experiments. This study represents a first assessment of the biological processes that may influence Hg bioaccumulation and dynamics in a marine predatory fish. We conducted a feeding experiment to investigate the dynamics of MeHg and iHg, as well as Hg isotopes in the liver and muscles of captive juvenile seabass (Dicentra

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