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1,606 Newest Publications about the topic mercury

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Mercury under Pressure acts as a Transition Metal: Calculated from First Principles

02-Jul-2015 | Jorge Botana, Xiaoli Wang, Chunju Hou, Dadong Yan, Haiqing Lin, Yanming Ma, Mao‐sheng Miao, Angewandte Chemie International Edition, 2015

Abstract The inclusion of Hg among the transition metals is readily debated. Recently, molecular HgF4 was synthesized in a low‐temperature noble gas but the potential of Hg to form compounds beyond a +2 oxidation state in a stable solid remains unresolved. We propose high‐pressure techniques ...

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Comparative Effects of Mercury(II) and Cadmium on MutS Homolog 6(MSH6)‐Mediated DNA Mismatch Binding Activities in Zebrafish (Danio rerio) Embryos

01-Jul-2015 | Tsung‐Nan Ho, Shih‐Tsung Sung, Kuan‐Ming Huang, Todd Hsu, Journal of Biochemical and Molecular Toxicology, 2015

ABSTRACT MutS homolog 6 (MSH6) of the MSH2–MSH6 complex binds simple mispairs and small insertion‐deletion loops (IDL) then initiates DNA mismatch repair in eukaryotes. We have shown the ability of Cd2+ to downregulate msh2/msh6 expression in zebrafish embryos via oxidative stress. This study ...

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Electrochemical Determination of Chlorpyrifos on a Nano-TiO2/Cellulose Acetate Composite Modified Glassy Carbon Electrode

26-Jun-2015 | Ammasai Kumaravel; Maruthai Chandrasekaran, Journal of Agricultural and Food Chemistry, 2015

A rapid and simple method of determination of chlorpyrifos is important in environmental monitoring and quality control. Electrochemical methods for the determination of pesticides are fast, sensitive, reproducible, and cost-effective. The key factor in electrochemical methods is the choice of ...

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An Alternative to Precious Metals: Hg(ClO4)2·3H2O as a Cheap and Water-Tolerant Catalyst for the Cycloisomerization of Allenols

25-Jun-2015 | Benito Alcaide; Pedro Almendros; Amparo Luna; Elena Soriano, The Journal of Organic Chemistry, 2015

Hg(ClO4)2·3H2O, a cheap, water-tolerant, and stable salt, catalyzes the cycloisomerization reaction or α-allenols to 2,5-dihydrofurans in an efficient and selective manner. The reaction is general and can be applied to differently functionalized substrates, including alkyl-substituted, ...

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Parsimonious Model for Simulating Total Mercury and Methylmercury in Boreal Streams Based on Riparian Flow Paths and Seasonality

25-Jun-2015 | Karin Eklöf; Andrea Kraus; Martyn Futter; Jakob Schelker; Markus Meili; Elizabeth W. Boyer; Kevin Bishop, Environmental Science & Technology, 2015

The complexity of mercury (Hg) biogeochemistry has made it difficult to model surface water concentrations of both total Hg (THg) and especially methylmercury (MeHg), the species of Hg having the highest potential for bioaccumulation. To simulate THg and MeHg variation in low-order streams, we ...

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Insights into the effect of dilute acid, hot water or alkaline pretreatment on the cellulose accessible surface area and the overall porosity of Populus

24-Jun-2015 | Xianzhi Meng; Tyrone Wells; Qining Sun; Fang Huang; Arthur Ragauskas, Green Chemistry, 2015

Pretreatment is known to make biomass more reactive to cellulase by altering the chemical compositions as well as physical structures of biomass. Simons’ staining technique along with mercury porosimetry was applied on the acid, neutral, and alkaline pretreated materials to measure the accessible ...

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The determination of mercury in mosses by a novel cold vapor generation atmospheric pressure glow microdischarge optical emission spectrometry after the multivariate optimization

24-Jun-2015 | Krzysztof Greda; Konrad Kurcbach; Katarzyna Ochromowicz; Tomasz Lesniewicz; Piotr Jamroz; Pawel Pohl, Journal of Analytical Atomic Spectrometry, 2015

A novel atmospheric pressure glow microdischarge system coupled with chemical vapor generation was applied to the optical emission spectrometry determination of Hg in samples of mosses (Pleurozium schreberi) from parks and surrounding forests of Wroclaw (Poland). The design of experiment (DOE) ...

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Effect of Pulse Width of Square Potential to Remove Silver Interference in the Determination of Mercury(II)

18-Jun-2015 | A. Farahi, M. Achak, L. El Gaini, S. El Yamani, M. Bakasse, M. A. El Mhammedi, Electroanalysis, 2015

Abstract A graphite electrode modified with silver (Ag‐CPE) has been applied to detect mercury(II) using differential pulse voltammetry (DPV). Under optimized conditions, the calibration curve is linear in the range from 5.0×10−8 mol L−1 to 1.0×10−4 mol L−1 of mercury(II). The detection limit ...

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Resorcinol formaldehyde xerogels modified with mercapto functional groups as mercury adsorbent

18-Jun-2015 | Siamak Motahari, Behzad Shiroud Heidari, Ghodratollah Hashemi Motlagh, Journal of Applied Polymer Science, 2015

ABSTRACT Resorcinol formaldehyde xerogels are modified by mercaptopropyl‐trimethoxysilane during the sol–gel process used to produce the xerogel. The chemical modification is confirmed by Fourier‐transform infrared spectroscopy. The xerogel is then used to adsorb mercury ions from aqueous ...

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Terbium (III)/gold nanoclusters conjugates: the development of a novel ratiometric fluorescent probe for mercury (II) and a paper-based visual sensor

17-Jun-2015 | Yanxia Qi; Min Zhang; Anwei Zhu; Guoyue Shi, Analyst, 2015

In this work, a novel ratiometric fluorescent probe was developed for rapid, highly accurate, sensitive and selective detection of mercury (II) (Hg2+) based on terbium (III)/gold nanoclusters conjugates (Tb3+/BSA-AuNCs), in which bovine serum albumin capped gold nanoclusters (BSA-AuNCs) acted as ...

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