Journal articles: 'Mercury Ions'

1

Deacon, GB, and GN Stretton. "Organomercury Compounds. XXVII. The Synthesis and Properties of Some Carboxylato- and Carboxy-pyridinylmercurials." Australian Journal of Chemistry 38, no. 3 (1985): 419. http://dx.doi.org/10.1071/ch9850419.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Decarboxylation of mercuric pyridine-2,3-dicarboxylate in hot dimethyl sulfoxide or hexamethylphosphoramide gives a mixture of 2-carboxylatopyridin-3-ylmercury(II) (major product) and 3- carboxylatopyridin-2-ylmercury(II) (minor product). The mixture reacts ( i ) with acidified halide ions ( Cl - or I-) to yield a mixture of the corresponding carboxypyridinyl ( halogeno )mercury(II) derivatives, (ii) with tribromide ions to give the bromo ( carboxypyridinyl )mercury(ii) complexes, 3-bromopyridine-2-carboxylic acid, and 2-bromopyridine-3- carboxylic acid, and (iii) with iodide ions in hot aqueous acetic acid to yield bis (2-carboxypyridin-3-yl)mercury(II) hydrogen triiodomercurate (II). Solutions of the last compound in dimethyl sulfoxide deposit bis (2-carboxypyridin-3-yl)mercury(II). Reaction of pyridine-2,3-dicarboxylate ions with mercuric acetate in boiling aqueous acetic acid at pH 5.0-5.8 gives mercurated acetic acid as the sole organometallic product, and the reported1 decarboxylation yielding 3-carboxylatopyridin-2-ylmercury(II) is not observed.

2

Kanan, Sofian M., Imad A. Abu-Yousef, Nora Hassouneh, Ahmed Malkawi, Naser Abdo, and Marsha C. Kanan. "A Highly Selective Luminescent Sensor for Detecting Mercuric Ions in Water." Australian Journal of Chemistry 62, no. 12 (2009): 1593. http://dx.doi.org/10.1071/ch09048.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

A chemoluminescent sensor utilizing the substrate 2,6-pyridinedicarboxaldehydebis(o-hydroxyphenylimine) (S1) was developed for low-concentration detection of mercuric ions in aqueous solutions. The sensor selectively detects mercury in the presence of sodium, calcium, magnesium, and iron ions. A strong binding was observed between the mercuric ions and the substrate at a pH range of 6.5–7.5, which makes the substrate a distinctive luminescence sensor for detecting mercury at ambient conditions. The sensor shows a linear response towards Hg2+ in the concentration range 5.0 × 10–5 to 2.5 × 10–8 M with a limit of detection of 5.0 × 10–8 M. The sensor can also detect zinc ions at a pH of 10 or higher. The results indicate that this sensor has a promising future for the detection of mercury in real environmental water samples.

3

Li, Xin-Gui, Qiang Dou, and Mei-Rong Huang. "Titrimetric analysis of total mercury ions including mercury(I) ions." Monatshefte für Chemie - Chemical Monthly 139, no. 10 (July 31, 2008): 1157–62. http://dx.doi.org/10.1007/s00706-008-0867-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Brown, N. L., Y. C. Shih, C. Leang, K. J. Glendinning, J. L. Hobman, and J. R. Wilson. "Mercury transport and resistance." Biochemical Society Transactions 30, no. 4 (August 1, 2002): 715–18. http://dx.doi.org/10.1042/bst0300715.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Resistance to mercuric ions in bacteria is conferred by mercuric reductase, which reduces Hg(II) to Hg(0) in the cytoplasmic compartment. Specific mercuric ion transport systems exist to take up Hg(II) salts and deliver them to the active site of the reductase. This short review discusses the role of transport proteins in resistance and the mechanism of transfer of Hg(II) between the mercury-resistance proteins.

5

Lu, Yi-Syuan, Bishnu Prasad Bastakoti, Malay Pramanik, Md Shahriar A. Hossain, Saad M. Alshehri, Yusuke Yamauchi, and Shiao-Wei Kuo. "Nanoarchitectures of self-assembled poly(styrene-b-4-vinyl pyridine) diblock copolymer blended with polypeptide for effective adsorption of mercury(ii) ions." RSC Advances 6, no. 108 (2016): 106866–72. http://dx.doi.org/10.1039/c6ra23431c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

The crosslinked PS-b-P4VP/PTyr materials possesses superior adsorbed mercur since mercury ions tend to bind to the pyridyl rings of P4VP and the amido groups of PTyr through ionic dipole interactions.

6

Wang, Zhankun, Yanqiu Hu, Xiaoxuan Zhou, and Yuguang Lv. "Construction of mercury ion fluorescence system in water samples and art materials and fluorescence detection method for rhodamine B derivatives." Green Processing and Synthesis 11, no. 1 (January 1, 2022): 987–95. http://dx.doi.org/10.1515/gps-2022-0085.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Abstract At present, the research on fluorescent molecular probe has become a hot topic in the field of environmental science, chemical materials, medicine, and other fields. Therefore, the detection of industrial mercury-containing wastewater (Hg2+) is of great significance. In this article, the fluorescent probe is used to detect mercury ions, and when compared with the traditional detection method, the fluorescent probe has the advantage of operation such as the effect of simplicity is evident. The experiments first synthesized rhodamine B derivatives and then the synthesized rhodamine B derivative fluorescent molecular probes were constructed and used to detect the mercury ions in water sample and oil paints. It was demonstrated that rhodamine B-derived probes have been constructed by UV and fluorescence spectroscopy. The different metal ions and rhodamine B-derived fluorescent molecular probes were compounded, resulting in the appearance of fluorescence peak centered at 583 nm only after the addition of metallic mercury ions with almost no response from other ions. The mercury ion rhodamine B derivative is more responsive to metallic mercury ions.

7

Liu, Chao, Hui Wang, Shengmin Xu, Hongbao Li, Yilin Lu, and Chuhong Zhu. "Recyclable Multifunctional Magnetic Fe3O4@SiO2@Au Core/Shell Nanoparticles for SERS Detection of Hg (II)." Chemosensors 11, no. 6 (June 15, 2023): 347. http://dx.doi.org/10.3390/chemosensors11060347.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Mercury ions can be enriched along the food chain and even low concentrations of mercury ions can seriously affect human health and the environment. Therefore, rapid, sensitive, and highly selective detection of mercury ions is of great significance. In this work, we synthesized Fe3O4@SiO2@Au three-layer core/shell nanoparticles, and then modified 4-MPy (4-mercaptopyridine) to form a SERS sensor. Mercury ions in water can be easily captured by 4-MPy which were used as the reporter molecules, and the concentration of mercury ions can be evaluated based on the spectral changes (intensification and reduction of peaks) from 4-MPy. After the mercury ion was combined with the pyridine ring, the peak intensity at 1093 cm−1 increased with the concentration of mercury ion in the range of 10 ppm–1 ppb, while the Raman intensity ratio I (416 cm−1)/I (436 cm−1) decreased with the increase of mercury ion concentration. This magnetically separatable and recyclable SERS sensor demonstrates good stability, accuracy, and anti-interference ability and shows the potential to detect actual samples. Furthermore, we demonstrate that the probe is applicable for Hg2+ imaging in macrophage cells.

8

Pratidina, Ellen Ayuningtyas, Eko Suhartono, and Bambang Setiawan. "IMPACT OF HEAVY METALS ON HEXOKINASE ISOFORMS: AN IN SILICO STUDY." Berkala Kedokteran 18, no. 1 (March 21, 2022): 29. http://dx.doi.org/10.20527/jbk.v18i1.12801.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Abstract: Coal mining activities in South Kalimantan produce waste that is very dangerous if not processed wisely. Coal waste produces heavy metals cadmium and mercury that can pollute the environment. Heavy metals that enter the human body will cause negative impacts in the field of health such as the disruption of the glycolysis process in humans. The purpose of this study was determine the interaction of heavy metals which is cadmium and mercury against hexokinase enzymes using hexokinase enzymes type I, II, III with PDB ID : 4F9O, 2NZT, 3HM8 taken from Protein Data Bank and using the molecular docking website MIB: Metal Ion Binding Site Prediction and Docking server. Docking results will be visualized using chimera app version 1.15. Molecular docking of the heavy metals cadmium and mercury can interact with all three types of hexokinase enzymes. Cadmium metal ions bind hydrophobicly to amino acid residues of hexokinase enzymes type I, II, and III, while mercury metal ions bind covalently coordinate with amino acid residues of hexokinase enzymes type I and III. Mercury metal ions bind more strongly than cadmium metal ions. Of the three types of hexokinase enzymes, mercury metal ions bind most strongly with hexokinase enzyme type II because mercury ions bind to the active site of the three amino acid residues of hexokinase enzymes type II.Keywords: Cadmium ; hexokinase enzyme ; mercury ; molecular docking

9

Dereka, Bogdan, Denis Svechkarev, and Andrey Doroshenko. "Facile ultrasensitive monitoring of mercury ions in water by fluorescent ratiometric detection." Open Chemistry 11, no. 4 (April 1, 2013): 584–93. http://dx.doi.org/10.2478/s11532-012-0193-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

AbstractProspects for analytical application of 2,5-diphenyloxazole-substituted 3-hydroxychromone for detection of mercury ions are presented. Sensitivity and selectivity for a number of metal ions both in methanol solution and in the plasticized polymer are outlined. Ultrasensitive and highly selective fluorescent ratiometric response of the polymer film containing the title compound for mercury ions in water media is revealed. Reversibility of ratiometric response to mercury ions and influence of plasticizer’s content in the polymer film on the optical feedback are also discussed.

10

Schué, Mathieu, Lynn G. Dover, Gurdyal S. Besra, Julian Parkhill, and Nigel L. Brown. "Sequence and Analysis of a Plasmid-Encoded Mercury Resistance Operon from Mycobacterium marinum Identifies MerH, a New Mercuric Ion Transporter." Journal of Bacteriology 191, no. 1 (October 17, 2008): 439–44. http://dx.doi.org/10.1128/jb.01063-08.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

ABSTRACT In this study, we report the DNA sequence and biological analysis of a mycobacterial mercury resistance operon encoding a novel Hg2+ transporter. MerH was found to transport mercuric ions in Escherichia coli via a pair of essential cysteine residues but only when coexpressed with the mercuric reductase.

11

Bondarenko, G. G., V. I. Kristya, D. O. Savichkin, and P. Żukowski. "Simulation of cathode surface sputtering by ions and fast atoms in Townsend discharge in argon-mercury mixture with temperature-dependent composition." Devices and Methods of Measurements 9, no. 3 (September 17, 2018): 227–33. http://dx.doi.org/10.21122/2220-9506-2018-9-3-227-233.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

The mixture of argon and mercury vapor is used as the background gas in different types of gas discharge illuminating lamps. The aim of this work was development of a model, describing transport of electrons, ions and fast atoms in the one-dimensional low-current gas discharge in argon-mercury mixture, and determination of the dependence of their contributions to the cathode sputtering, limiting the device service time, on the temperature.For simulation of motion of electrons we used the Monte Carlo method of statistical modeling, whereas the ion and metastable excited atom motion, in order to reduce the calculation time, we described on the basis of their macroscopic transport equations, which allowed to obtain their flow densities at the cathode surface. Then, using the Monte Carlo method, we found the energy spectra of ions and fast atoms, generated in collisions of ions with mixture atoms, at the cathode surface and also the effective coefficients of the cathode sputtering by each type of particles.Calculations showed that the flow densities of argon ions and fast argon atoms, produced in collisions of argon ions with slow argon atoms, do not depend on the temperature, while the flow densities of mercury ions and fast argon atoms generated by them grow rapidly with the temperature due to an increase of mercury content in the mixture.There are represented results of modeling of the energy spectra of ions and fast atoms at the cathode surface. They demonstrate that at low mercury content in the mixture of the order of 10–3 the energies of mercury ions exceed that of the other types of particles, so that the cathode is sputtered mainly by mercury ions, and their contribution to sputtering is reduced at a mixture temperature decrease.

12

Kanan, Sofian, Aysha Shabnam, Ahmed A. Mohamed, and Imad A. Abu-Yousef. "Organic Luminescent Sensor for Mercury(II) and Iron(III) Ions in Aqueous Solutions." Chemosensors 11, no. 5 (May 20, 2023): 308. http://dx.doi.org/10.3390/chemosensors11050308.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

The substrate N1, N3, N5-tris(2-hydroxyphenyl)benzene-1,3,5-tricarboxamide (Sensor A) was prepared in the reaction of 1,3,5-benzenetricarboxylic acid (trimesic acid) and o-aminophenol in ethanol. The prepared organic sensor fulfills the chemiluminescent requirements including a luminophore, spacer, and suitable binding receptor that distress the probe’s luminescent features, providing selective and sensitive detection of mercury and iron ions in aqueous solutions. The sensor selectively detects mercury and iron ions in a water matrix containing various metal ions, including sodium, calcium, magnesium, zinc, and nickel. Strong and immediate binding was observed between mercury ions and the substrate at pH 7.0 with a binding affinity toward Hg2+ 9-fold higher than that observed for iron sensor binding affinity, which makes the substrate a distinctive luminescence sensor for mercury detection at ambient conditions. The sensor shows a linear response toward Hg2+ in the concentration range from 50 ppb to 100 ppm (2.0 × 10−8 to 4.2 × 10−5 M) with a limit of detection of 2 ppb (1.0 × 10−8 M). Further, Sensor A provides linear detection for iron ions in the range from 10 ppb to 1000 ppm (1.5 × 10−8 to 1.5 × 10−3 M). The measured adsorption capacity of Sensor A toward mercury ions ranged from 1.25 to 1.97 mg/g, and the removal efficiency from water samples reached 98.8% at pH 7.0. The data demonstrate that Sensor A is an excellent probe for detecting and removing mercury ions from water bodies.

13

Shellaiah, Muthaiah, and Kien-Wen Sun. "Progress in Metal-Organic Frameworks Facilitated Mercury Detection and Removal." Chemosensors 9, no. 5 (May 4, 2021): 101. http://dx.doi.org/10.3390/chemosensors9050101.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Metal Organic Frameworks (MOFs) are noted as exceptional candidates towards the detection and removal of specific analytes. MOFs were reported in particular for the detection/removal of environmental contaminants, such as heavy metal ions, toxic anions, hazardous gases, explosives, etc. Among heavy metal ions, mercury has been noted as a global hazard because of its high toxicity in the elemental (Hg0), divalent cationic (Hg2+), and methyl mercury (CH3Hg+) forms. To secure the environment and living organisms, many countries have imposed stringent regulations to monitor mercury at all costs. Regarding the detection/removal requirements of mercury, researchers have proposed and reported all kinds of MOFs-based luminescent/non-luminescent probes towards mercury. This review provides valuable information about the MOFs which have been engaged in detection and removal of elemental mercury and Hg2+ ions. Moreover, the involved mechanisms or adsorption isotherms related to sensors or removal studies are clarified for the readers. Finally, advantages and limitations of MOFs in mercury detection/removal are described together with future scopes.

14

Srivastava, Shrinkhala, and Saurabh Srivastava. "Biomedical Waste Management of Mercury using Advanced Polymeric Materials: Application of MIP - Sieve Sensor." SAMRIDDHI : A Journal of Physical Sciences, Engineering and Technology 9, no. 01 (June 25, 2017): 51–55. http://dx.doi.org/10.18090/samriddhi.v9i01.8338.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

The most common routes of exposure to mercury in the healthcare facility include inhalation of inorganic mercury vapour after a spill or accidental skin contact with mercury. Accidental spills of liquid mercury can increase the levels of mercury in the air or wastewater of a HCFs. Establishing protocols for proper cleanup of spills involving mercury is an on flow challenge in Healthcare Sector where Bio safety and Bioethics are first law to be followed for human safety. The surface ion-imprinted poly(ethylene terephthalate)- semicarbazide (PETSC) modified chelating fibre sieves (Hg-PET-SC) were prepared using Hg(II) as a template and formaldehyde as a cross-linker and showed higher adsorption capacity and selectivity for the Hg(II) ions compared with the nonimprinted fibres (NIP-PET-SC) without a template. The maximum limit of detection values for Hg-PET-SC and NIP-PET-SC were 60.05 g/l and 24.51 g/l, respectively using MIP-PET-SC-CNE and NIP-PET-SC-CNE sensors. The selectivity coefficient of Hg(II) ions and other metal ions on Hg-PET-SC indicated an overall preference for Hg(II) ions. Rebinding and crossselectivity studies were also carried out using various divalent ions as interferents.

15

Juárez-Gómez, J., E. S. Rosas-Tate, G. Roa-Morales, P. Balderas-Hernández, M. Romero-Romo, and M. T. Ramírez-Silva. "Laccase Inhibition by Mercury: Kinetics, Inhibition Mechanism, and Preliminary Application in the Spectrophotometric Quantification of Mercury Ions." Journal of Chemistry 2018 (June 4, 2018): 1–7. http://dx.doi.org/10.1155/2018/7462697.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

The noncompetitive inhibition of laccase by mercury ions is reported, in particular focusing their effect over the enzyme catalytic activity. The enzymatic kinetics were obtained for different substrates (caffeic acid, gallic acid, and catechol), where caffeic acid displayed the greatest enzymatic activity. The laccase inhibition by mercury ions permitted to establish the inhibition effect through a mixed model (that actually displayed a behavior closer to that of the noncompetitive inhibitors) when evaluated by means of UV-Vis spectrophotometry, using caffeic acid as an electron donor. A mercury concentration of 2 mM led to 35% enzymatic inhibition after only a 2-minute incubation period. This method was used for quantification of mercury ions in aqueous solution, showing a detection limit of 15 ± 1 ppm. Therefore, this work presented a novel perspective for the determination of the toxic Hg(II) ions that can be readily implemented into environmental remediation methods.

16

He, Ying. "Application of Biomimetic Nanomaterials in Biological Detection and the Intelligent Recognition Method of Nanoparticle Images." Journal of Nanoelectronics and Optoelectronics 16, no. 1 (January 1, 2021): 23–30. http://dx.doi.org/10.1166/jno.2021.2904.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

New nanomaterials (metal nanoclusters, graphene, etc.) are favored by researchers due to their unique properties and are widely used in biomedical detection. The excellent fluorescence characteristics of gold nanoclusters are utilized to develop a fast and highly sensitive bionic nanomaterial with non-label and dual functions, which can detect silver ions and mercury ions and study the particularity of TEM nanoparticle images. The particle segmentation of TEM nanoparticle images is studied to compare the traditional watershed algorithm and watershed transformation algorithm. The experiment results show that silver ions can enhance the fluorescence of gold nanoclusters to form gold-silver nanoclusters with strong yellow fluorescence, and mercury ions can quickly weaken the fluorescence of gold-silver nanoclusters. Based on the biomimetic nanomaterials, a dual-function fluorescent probe is designed to detect silver ions and mercury ions in lake with detection accuracy of 8 nM and 33 nM respectively; the sensing excitation of the fluorescent probe is further analyzed. Because the metal-enhanced fluorescence (MEF) effect enables the silver element and Au nanoparticles to form fluorescence-enhancing effect, the high metalphilic interaction between mercury ions and silver ions quenches the fluorescence effect of gold nanocluster; the rapid watershed transformation/region fusion method can achieve better particle image segmentation combined with the image segmentation algorithms of different TEM nanoparticles, which can be better applied to the characterization analysis of the preparation of gold nanomaterials.

17

Kasraei, Shahin, Loghman Rezaei-Soufi, and Mohaddese Azarsina. "The Effect of a 16% Carbamide Peroxide Gel on Mercury and Silver Ion Release from Admixed and Spherical Dental Amalgams." Journal of Contemporary Dental Practice 11, no. 6 (2010): 9–16. http://dx.doi.org/10.5005/jcdp-11-6-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Abstract Aim The aim of this study was to investigate the effect of 16 percent carbamide peroxide gel on mercury and silver ions released from admixed and spherical dental amalgams. Methods and Materials A total of 96 amalgam discs were prepared from two different types and brands of dental amalgam (admixed and spherical). The samples were stored at room temperature in glass tubes containing distilled water for 24 hours. The specimens were then polished and again immersed in distilled water at room temperature and stored for one month. Samples of both types of dental amalgam were treated with carbamide peroxide 16 percent gel (Nite White, Discus Dental, Inc., Culver City, CA, USA) for 14 and 28 hours (experimental group) and compared to samples not exposed to the bleaching agent but stored continuously in distilled water. Mercury and silver levels of each solution were measured using the VAV–440 analyzer system. Results Mercury and silver ions released from the experimental group were significantly greater than from the control group (p<0.001). There was no significant difference between the mean levels of mercury and silver ions in the two kinds of amalgams after treatment with 16 percent carbamide peroxide (p=0.119 for mercury and p=0.199 for silver). Increasing the storage time in the carbamide peroxide gel from 14 to 28 hours did not result in significant changes in the amount of ions released (p=0.329 for mercury and p=0.082 for silver). Also, the interaction effect between amalgam particles’ shape (admixed and spherical) versus storage time (14 versus 28 hours) was not statistically significant (p=0.901 for mercury and p=0.951 for silver). Conclusion Treatment with 16 percent carbamide peroxide gel increased mercury and silver ions released from admixed and spherical amalgams, compared to samples in the control group, but the difference between the two amalgams was not statistically significant. Clinical Significance The amount of mercury and silver ions released from high-copper dental amalgams during bleaching with 16 percent carbamide peroxide is in the safe range of mercury intake for patients. Citation Kasraei S, Rezaei-Soufi L, Azarsina, M. The Effect of a 16% Carbamide Peroxide Gel on Mercury and Silver Ion Release from Admixed and Spherical Dental Amalgams. J Contemp Dent Pract [Internet]. 2010 December; 11(6):009-016. Available from: http://www.thejcdp.com/journal/ view/volume11-issue6-rezaeisoufi

18

Güney, Sevgi, Gülcemal Yıldız, and Gönül Yapar. "Determination of Mercury (II) Ion on Aryl Amide-Type Podand-Modified Glassy Carbon Electrode." International Journal of Electrochemistry 2011 (2011): 1–6. http://dx.doi.org/10.4061/2011/529415.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

A new voltammetric sensor based on an aryl amide type podand, 1,8-bis(o-amidophenoxy)-3,6-dioxaoctane, (AAP) modified glassy carbon electrode, was described for the determination of trace level of mercury (II) ion by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). A well-defined anodic peak corresponding to the oxidation of mercury on proposed electrode was obtained at 0.2 V versus Ag/AgCl reference electrode. The effect of experimental parameters on differential voltammetric peak currents was investigated in acetate buffer solution of pH 7.0 containing 1 × 10−1 mol L−1NaCl. Mercury (II) ion was preconcentrated at the modified electrode by forming complex with AAP under proper conditions and then reduced on the surface of the electrode. Interferences of Cu2+, Pb2+, Fe3+, Cd2+, and Zn2+ions were also studied at two different concentration ratios with respect to mercury (II) ions. The modified electrode was applied to the determination of mercury (II) ions in seawater sample.

19

Tidecks, Reinhard. "Evidence for electron-tunneling-limited Knudsen diffusion of mercury in phosphor layers and coatings of fluorescent lamps." European Physical Journal Applied Physics 91, no. 3 (September 2020): 30801. http://dx.doi.org/10.1051/epjap/2020190286.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Recent experimental studies and modelling of the mercury loss (i.e. the mercury consumption) in fluorescent lamps yield diffusion coefficients of mobile mercury in phosphor layers and coatings, which are several orders of magnitude smaller than expected for a gas diffusion in a situation in which the mean free path of the diffusing particles is restricted by the pore radius in those materials (Knudsen diffusion). In the present work it is shown that the transition of mercury ions from the plasma to the Knudsen diffusion regime may be one reason for this observation. Another possibility is that only discharged ions from the plasma form the mercury oxide as which mercury is deposited in the phosphor layer and coating, from the investigation of which the diffusion coefficient of mobile mercury is concluded by fitting the model to the experiment.

20

Robinson, Arthur L. "Laser-Cooling Mercury Ions Via Beryllium." Science 233, no. 4764 (August 8, 1986): 623–24. http://dx.doi.org/10.1126/science.233.4764.623.b.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

ROBINSON, A. L. "Laser-Cooling Mercury Ions Via Beryllium." Science 233, no. 4764 (August 8, 1986): 623–24. http://dx.doi.org/10.1126/science.233.4764.623-a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Aleksey, Afonin, Komarova LN, and Lyapunova ER. "The effect of mercury ions on the metabolic activity of Poecilia Reticulata cells." International Journal of Aquaculture and Fishery Sciences 9, no. 1 (March 22, 2023): 001–3. http://dx.doi.org/10.17352/2455-8400.000085.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Among anthropogenic factors polluting ecosystems and affecting living organisms, mercury, and its compounds are the most toxic. In this study, we investigated the effect of mercury ions on freshwater live-bearing fish Poecilia reticulata. The cytotoxicity of mercury was analyzed on Poecilia reticulata fry using the MTT test. Studies have shown that small concentrations of mercury can have a stimulating effect on the metabolic activity of fish cells, but at high concentrations, the mercury had a depressing effect.

23

Frański, Rafał, Błażej Gierczyk, Grzegorz Schroeder, Stefan Pieper, Andreas Springer, and Michael Linscheid. "Electrospray ionization mass spectrometric study of mercury complexes of N-heterocyclic carbenes derived from 1,2,4-triazolium salt precursors." Open Chemistry 5, no. 1 (March 1, 2007): 316–29. http://dx.doi.org/10.2478/s11532-006-0050-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

AbstractBy mixing 1,2,4-triazolium salts (precursors of N-heterocyclic carbenes 1–6) with mercury acetate, a number of complexes have been obtained under electrospray ionization condition. Carbenes 1 and 2 contain one carbene center; therefore, they are able to bond only one mercury cation. Carbenes 3–5 contain two carbene centers; therefore, they can bond two mercury cations. Mercury complexes of 1–5 always contain an acetate anion attached to a mercury cation. Carbene 6 also contains two carbene centers; however, its structure allows formation of a complex containing mercury bonded simultaneously to both centers, therefore, the complex that does not contain an acetate anion. The MS/MS spectra taken for complexes of carbenes 1–5 have shown formation of a cation corresponding to N1 substituent (adamantyl or benzyl), and those of complexes of carbenes 3–5 (doubly charged ions) have also shown the respective complementary partner ions. Mercury complex of 2 has yielded some other interesting fragmentation pathways, e.g. a loss of the HHgOOCCH3 molecule. The fragmentation pathway of the mercury complexes of 6 was found to be complicated.

24

Aboufazeli, Forouzan, Hamid Reza Lotfi Zadeh Zhad, Vahid Amani, Ezatollah Najafi, Omid Sadeghi, and Najmeh Tavassoli. "Determination of Mercury (II) Ions by Modified Carbon Paste Electrode Based on Functionalized Nanoporous MCM-48 and Multi-Walled Carbon Nanotubes (MWCNTs)." Journal of New Materials for Electrochemical Systems 16, no. 1 (August 6, 2012): 41–46. http://dx.doi.org/10.14447/jnmes.v16i1.48.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

A carbon paste electrode for determination of mercury (II) ions in real samples was prepared. The main objective of the present study was to evaluate the concentration of mercury ions in different soil, water, plant, and animal muscle samples by utilizing modified carbon paste electrode. Functionalized nanoporous MCM-48 and multi-walled carbon nanotubes material were used in order to increase the efficiency and selectivity of the electrode for mercury ions determination. The electrode composition material was optimized as graphite powder 57%, Paraffin 22%, modified MCM-48 16% and MWCNTs 5% (W/W). The linear range of the electrode was calculated 5.0×10-8 to 1.0×10-3 mol L-1, and a detection limit was obtained 1.5×10-8 mol L-1. The potential slope was achieved 29.7±1.0 mV, and lifetime for the electrode was investigated about 5 months. The proposed method was applied to a number of natural samples and the amount of mercury was determined.

25

Balusamy, Brabu, Anitha Senthamizhan, and Tamer Uyar. "Functionalized Electrospun Nanofibers as Colorimetric Sensory Probe for Mercury Detection: A Review." Sensors 19, no. 21 (November 2, 2019): 4763. http://dx.doi.org/10.3390/s19214763.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Mercury is considered the most hazardous pollutant of aquatic resources; it exerts numerous adverse effects on environmental and human health. To date, significant progress has been made in employing a variety of nanomaterials for the colorimetric detection of mercury ions. Electrospun nanofibers exhibit several beneficial features, including a large surface area, porous nature, and easy functionalization; thus, providing several opportunities to encapsulate a variety of functional materials for sensing applications with enhanced sensitivity and selectivity, and a fast response. In this review, several examples of electrospun nanofiber-based sensing platforms devised by utilizing the two foremost approaches, namely, direct incorporation and surface decoration envisioned for detection of mercury ions are provided. We believe these examples provide sufficient evidence for the potential use and progress of electrospun nanofibers toward colorimetric sensing of mercury ions. Furthermore, the summary of the review is focused on providing an insight into the future directions of designing electrospun nanofiber-based, metal ion colorimetric sensors for practical applications.

26

Serebrennikova, K. V., A. N. Berlina, A. V. Zherdev, and B. B. Dzantiev. "A LATERAL FLOW TEST SYSTEM FOR THE SENSITIVE DETERMINATION OF MERCURY IONS IN WATER BODIES." BIOTECHNOLOGY: STATE OF THE ART AND PERSPECTIVES 1, no. 2022-20 (2022): 160–61. http://dx.doi.org/10.37747/2312-640x-2022-20-160-161.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

A lateral flow test system has been implemented and the conditions for the sensitive and selective determination of mercury ions in the matrix of natural waters have been optimized. A linear range for mercury ions concentration from 0.3 to 25 ng/ml and limit of detection of 0.13 ng/mL were achieved, which meets the practical requirements for drinking water.

27

Gaur, Mulayam Singh, Rajni Yadav, Mamta Kushwah, and Anna Nikolaevna Berlina. "Modern nanobiotechnologies for efficient detection and remediation of mercury." Sensor Review 41, no. 6 (October 24, 2021): 461–80. http://dx.doi.org/10.1108/sr-12-2020-0290.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Purpose This information will be useful in the selection of materials and technology for the detection and removal of mercury ions at a low cost and with high sensitivity and selectivity. The purpose of this study is to provide the useful information for selection of materials and technology to detect and remove the mercury ions from water with high sensitivity and selectivity. The purpose of this study is to provide the useful information for selection of materials and technology to detect and remove the mercury ions from water with high sensitivity and selectivity. Design/methodology/approach Different nano- and bio-materials allowed for the development of a variety of biosensors – colorimetric, chemiluminescent, electrochemical, whole-cell and aptasensors – are described. The materials used for their development also make it possible to use them in removing heavy metals, which are toxic contaminants, from environmental water samples. Findings This review focuses on different technologies, tools and materials for mercury (heavy metals) detection and remediation to environmental samples. Originality/value This review gives up-to-date and systemic information on modern nanotechnology methods for heavy metal detection. Different recognition molecules and nanomaterials have been discussed for remediation to water samples. The present review may provide valuable information to researchers regarding novel mercury ions detection sensors and encourage them for further research/development.

28

Kubareva, Marina, Elena Denisova, Anatoly Soloviev, and Vadim Smirnov. "Features of mercury migration in natural objects of technogenically polluted areas." E3S Web of Conferences 254 (2021): 02024. http://dx.doi.org/10.1051/e3sconf/202125402024.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

The article discusses own studies’ materials of anthropogenic mercury migration in the “soil− plant − surface water- water body bottom sediments” system on the example of technogenically mercury-polluted territory of the northern industrial zone of Pavlodar city in Kazakhstan. The mercury distribution processes in soil at a depth of up to two meters, in water and bottom sediments of the Irtysh River, as well as in “Pamyat’ Azieva” soft spring wheat variety grown on soils with maximum pollution level were studied. It was discovered that the mercury migration degree to groundwater and plant objects depends on the soil type: so, it is minimal in chernozem soil. It was revealed that the mercury amount in the soil is in a positive correlation with its mineralization degree, filtration level, as well as the presence of chloride ions. The article also discusses the research results on the complex and diverse influence of predominant ions in soil, as well as their combinations on the content and distribution of mercury.

29

Musa, Suhartini, Baharuddin Hamzah, and Daud K. Walanda. "Effect of Copper(II) and Cadmium(II) Ions Against the Percent Mercury Ion Extraction Using Emulsion Liquid Membrane Technique." Jurnal Akademika Kimia 8, no. 4 (November 29, 2019): 218–22. http://dx.doi.org/10.22487/j24775185.2019.v8.i4.pp218-222.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

The effect of copper(II) and cadmium(II) ions on the percent of mercury ion extraction using an emulsion liquid membrane technique have been performed. This study used HNO3 as an internal phase, mixed span 80 and span 20 as a surfactant, benzoyl acetone as cation carrier, kerosene as membrane phase, and mercury solution as a sample solution. Variations of concentrations of copper(II) and cadmium(II) ions added were 10, 20, and 30 ppm with mercury concentrations of 30 ppm. The result of the research showed that the addition of copper(II) ion with concentrations of 10 to 30 ppm decreased the percentage of mercury ion extraction 30 ppm by 12.12% and the addition of cadmium(II) ion with the concentration of 10 to 30 ppm decreased the percentage of mercury ion extraction 30 ppm by 11.74%.

30

Ali, Shahid, Muhammad Mansha, Nadeem Baig, and Safyan Akram Khan. "Cost-Effective and Selective Fluorescent Chemosensor (Pyr-NH@SiO2 NPs) for Mercury Detection in Seawater." Nanomaterials 12, no. 8 (April 7, 2022): 1249. http://dx.doi.org/10.3390/nano12081249.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

The release of mercury into the environment has adverse effects on humans and aquatic species, even at very low concentrations. Pyrene and its derivatives have interesting fluorescence properties that can be utilized for mercury (Hg2+) ion sensing. Herein, we reported the highly selective pyrene-functionalized silica nanoparticles (Pyr-NH@SiO2 NPs) for chemosensing mercury (Hg2+) ions in a seawater sample. The Pyr-NH@SiO2 NPs were synthesized via a two-step protocol. First, a modified Stöber method was adopted to generate amino-functionalized silica nanoparticles (NH2@SiO2 NPs). Second, 1-pyrenecarboxylic acid was coupled to NH2@SiO2 NPs using a peptide coupling reaction. As-synthesized NH2@SiO2 NPs and Pyr-NH@SiO2 NPs were thoroughly investigated by 1H-NMR, FTIR, XRD, FESEM, EDS, TGA, and BET surface area analysis. The fluorescent properties were examined in deionized water under UV-light illumination. Finally, the developed Pyr-NH@SiO2 NPs were tested as a chemosensor for Hg2+ ions detection in a broad concentration range (0–50 ppm) via photoluminescence (PL) spectroscopy. The chemosensor can selectively detect Hg2+ ions in the presence of ubiquitous ions (Na+, K+, Ca2+, Mg2+, Ba2+, Ag+, and seawater samples). The quenching of fluorescence properties with Hg2+ ions (LOD: 10 ppb) indicates that Pyr-NH@SiO2 NPs can be effectively utilized as a promising chemosensor for mercury ion detection in seawater environments.

31

Kempahanumakkagari, Sureshkumar, Pandurangappa Malingappa, Gopi Ambikapathi, and Devaraju Kuramkote Shivanna. "2,7-Dichlorofluorescein Hydrazide as a New Fluorescent Probe for Mercury Quantification: Application to Industrial Effluents and Polluted Water Samples." Journal of Spectroscopy 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/276981.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

A new fluorescent probe 2,7-dichlorofluorescein hydrazide for mercury quantification in aqueous medium has been described. It is based on the spirolactam ring opening of colorless and nonfluorescent 2,7-dichlorofluorescein hydrazide induced by Hg2+ions through the hydrolytic cleavage of amide bond to produce green-colored highly fluorescent dichlorofluorescein in alkaline medium. The significant color change of this reagent in the presence of mercury ions can be used as a sensitive naked-eye detector. The working range, limit of detection, and relative standard deviations were found to be 0.2–20 ngmL−1, 0.042 ngmL−1, and 0.69% respectively. The proposed method is free from most of the common interfering ions present in the environmental samples. The developed method has been successfully applied to determine trace level mercury from water, soil, and industrial effluents.

32

Kim, N. O., and E. A. Ivanovskaya. "Study of the influence of interfering ions of heavy metals and various sample preparation on the determination of mercury impurity in protamine sulfate by stripping voltammetry." JOURNAL of SIBERIAN MEDICAL SCIENCES, no. 1 (2021): 12–19. http://dx.doi.org/10.31549/2542-1174-2021-1-12-19.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Aim. To determine the content of mercury in protamine sulfate samples with different sample preparation. To study the effect of interfering ions on the content of mercury impurity in protamine sulfate by stripping voltammetry (SV). Materials and methods. We used a solution for injection of protamine sulfate, batches 515091, 514062, 514111; for sample preparation — various options for dilution and precipitation. Dilution was carried out with bidistilled water, and the precipitation of proteins — with sodium tungstate in 2 options. Mercury impurities were determined by the SV method. Results. The mercury content in protamine sulfate samples was 0.000417 ± 0.00140 and 0.000420 ± 0.00152 mg/l when diluted with water 1 : 2 and 1 : 1 respectively and 0.000462 ± 0.00131 and 0.000459 ± 0.00121 when precipitated with tungstate in options 1 and 2 respectively. With the addition of an interfering ion, for example, Cu2+, the content of mercury in the medicinal product was 0.000606 ± 0.00015, 0.000452 ± 0.00013 and 0.0004212 ± 0.00011 mg/l for protamine sulfate batches 514062, 515091 and 514111 respectively, which does not exceed the values determined by the product specification. The addition of Pb2+, Fe2+, Zn2+, Cu2+, and Cd2+ ions also had no effect on the determination of the mercury content in protamine sulfate samples. Conclusion. To determine the mercury impurity in the protamine sulfate, special sample preparation is not required. Ions of Cu2+, Pb2+, Fe2+, Cd2+, Zn2+ do not affect the result of determining the mercury content in protamine sulfate samples by the SV method, which indicates a high selectivity of the method used.

33

Luo, Jun Jiang, Ling Yun Qin, Xiao Juan Du, Hong Qun Luo, Nian Bing Li, and Bang Lin Li. "Mercury ion-engineering Au plasmonics on MoS₂ layers for absorption-shifted optical sensors." Analytical Methods 13, no. 45 (2021): 5436–40. http://dx.doi.org/10.1039/d1ay01637g.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Mercury ions can modulate the surface engineering effect of MoS2. Based on the cooperative optical characteristics of semiconducting MoS2 and plasmonic gold nanostructures, a novel colorimetric mercury sensing is established.

34

Popel, S. I., A. P. Golub', and L. M. Zelenyi. "Dusty plasmas above the sunlit surface of Mercury." Physics of Plasmas 30, no. 4 (April 2023): 043701. http://dx.doi.org/10.1063/5.0142936.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Above the sunlit surface of Mercury, the properties and formation of dusty plasmas are investigated. It is demonstrated that the dusty plasmas are formed for subsolar angles exceeding approximately 76° due to photoelectric and electrostatic processes. As a result, the dusty plasmas are present in the polar regions of Mercury, characterized by latitudes of about 70° and above. The formation of dusty plasmas is also possible for lower latitudes, but only where the surface profile allows it. Plasmas above the sunlit surface of Mercury consist, in particular, of photoelectrons, electrons, and ions of the solar wind, and also charged dust particles. The distribution functions of photoelectrons near the surface of Mercury, as well as the altitude dependences of the number densities of dust particles, their charges and sizes, as well as electric fields, are obtained. The calculations are carried out which correspond to the position of Mercury at aphelion and perihelion of its orbit for the situations of dusty plasma location in the vicinity of magnetic poles of Mercury and in other regions. It is shown that there are qualitative differences between the dusty plasma systems of Mercury and the Moon related to the fact that Mercury has a magnetosphere and Mercury's orbit is one of the most eccentric of all planetary orbits in the Solar System. The effects of magnetic fields can slightly influence the dust particle transport and, correspondingly, the expansion of the region of the existence of dusty plasmas above the surface of Mercury due to the effect of dust particle transport is not so significant as at the Moon. Furthermore, due to the presence of Mercury's magnetosphere, the solar wind is important for the formation of dusty plasmas at Mercury only in the vicinity of the regions of the magnetic poles. In other regions of Mercury, in contrast to the situation at the Moon, the solar wind does not influence significantly the dusty plasma properties. The dusty plasma parameters are different in the cases of aphelion and perihelion of the orbit of Mercury.

35

Han, Jinglong, Huajun Liu, Ji Qi, Jiawen Xiang, Longwen Fu, Xiyan Sun, Liyan Wang, Xiaoyan Wang, Bowei Li, and Lingxin Chen. "A Simple and Effective Visual Fluorescent Sensing Paper-Based Chip for the Ultrasensitive Detection of Mercury Ions in Environmental Water." Sensors 23, no. 6 (March 14, 2023): 3094. http://dx.doi.org/10.3390/s23063094.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Traces of mercury ions in environmental water can harm humans and animals. Paper-based visual detection methods have been widely developed for the rapid detection of mercury ions; however, existing methods are not sensitive enough to be used in real environments. Here, we developed a novel, simple and effective visual fluorescent sensing paper-based chip for the ultrasensitive detection of mercury ions in environmental water. CdTe-quantum-dots-modified silica nanospheres were firmly absorbed by and anchored to the fiber interspaces on the paper’s surface to effectively avoid the unevenness caused by liquid evaporation. The fluorescence of quantum dots emitted at 525 nm can be selectively and efficiently quenched with mercury ions, and the ultrasensitive visual fluorescence sensing results attained using this principle can be captured using a smartphone camera. This method has a detection limit of 2.83 µg/L and a fast response time (90 s). We successfully achieved the trace spiking detection of seawater (from three regions), lake water, river water and tap water with recoveries in the range of 96.8–105.4% using this method. This method is effective, low-cost, user-friendly and has good prospects for commercial application. Additionally, the work is expected to be utilized in the automated big data collection of large numbers of environmental samples.

36

Zade, Prashant D., and Dattatray M. Dharmadhikari. "Retrieval of Mercury from Wastewater as Stable Mercury Ferrite." Water Quality Research Journal 42, no. 4 (November 1, 2007): 311–18. http://dx.doi.org/10.2166/wqrj.2007.033.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Abstract Mercury contamination in water and wastewater is a global risk and health problem. So there is a concrete need for an eco-friendly process that can remove the toxic mercury ions as well as convert the mercury to a value added product. The black ferruginous mercury ferrite (FMF) as a value added product was synthesized by coprecipitation technique at 50°C. X-ray diffraction studies conducted on FMF obtained using CuKα1 radiation revealed that this crystalline compound has an orthorhombic symmetry. The method described in this study removed mercury ions with greater efficiency compared with the prevalent methods quoted in the literature. The results of thermal analysis of the synthesized compound, on comparison with magnetite (Fe3O4), revealed a shifting of the exothermic peak towards the lower temperature side. This behavior indicates phase transition and sample crystallization. The DC resistivity studies on FMF carried out at various temperatures in the range of 27 to 500°C showed that the compound is a semiconductor in nature and shows sharp changes in the resistivity in the temperature range of 342.38 ± 10°C (Tcelect). The recovered FMF could be used in several applications such as semiconductors, at high temperature applications, to minimize eddy current losses, and as adsorbents as well as catalysts for the reduction of exhaust gas emissions.

37

Hua, Kang, Xueliu Xu, Zhiping Luo, Dong Fang, Rui Bao, and Jianhong Yi. "Effective Removal of Mercury Ions in Aqueous Solutions: A Review." Current Nanoscience 16, no. 3 (April 2, 2020): 363–75. http://dx.doi.org/10.2174/1573413715666190112110659.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Background: Due to its high toxicity and bioaccumulation, the existence of mercury in the environment is always a big threat to human beings. In order to control mercury pollution, scientists have put great efforts in the past decades. Methods: Precipitation, adsorption, membrane separation, biological treatment and ion exchange are reviewed as a remover for mercury removal. For each material type, we not only reported on the removal mechanism, but also discussed the best areas for it. The correlation method and step-to-step focusing method have been used for references. Conclusion: With the exploration and application of research, people have mastered a variety of mature technologies for the treatment of mercury-containing wastewater. Using inexpensive adsorbents is a cost-effective method for treating low concentrations of heavy metal wastewater. Ion exchange with a fast removal rate has been widely used in the field of heavy metal removal from wastewater. The biological treatment method can effectively treat low-concentration mercurycontaining wastewater. However, there is still a need to develop novel mercury removers with high capacity, fast removal rate, and low removal limit. Nanomaterials with a high specific surface area on substrate with synergistic effects, such as high adsorption and ion exchange, are the future research points.

38

López-García, Ignacio, Yesica Vicente-Martínez, and Manuel Hernández-Córdoba. "Determination of ultratraces of mercury species using separation with magnetic core-modified silver nanoparticles and electrothermal atomic absorption spectrometry." Journal of Analytical Atomic Spectrometry 30, no. 9 (2015): 1980–87. http://dx.doi.org/10.1039/c5ja00213c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

The use of magnetic-based nanocomposites allows both mercury ions and relevant mercury organic species to be preconcentrated and then measured by ETAAS. Results for waters and edible fish oils are given.

39

Belenkaya, Elena, Ivan Pensionerov, Igor Alexeev, and David Parunakian. "Excess of Sodium Ions Density Required to Create a Wide Current at the Hermean Magnetopause." Universe 7, no. 10 (September 23, 2021): 355. http://dx.doi.org/10.3390/universe7100355.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

In this paper we consider an unusual structure, twice observed at the magnetopause of Mercury, and called the “Double Magnetopause”. Presumably, it is associated with a current sheet created by Na+ ions. Two alternative scenarios are considered. The first one: Sodium ions prevail outside the Hermean magnetosphere. The second: Sodium ions predominate inside the magnetosphere of Mercury. These ions have been observed inside and outside the magnetosphere. We analyze what Na+ density excess can be sufficient for creation of a wide diamagnetic magnetopause current and on which side of the magnetopause this current is located. For each scenario, two directions of the north-south (Z) component of the solar wind magnetic field are considered.

40

Firdaus, M., Angga Aprian, Nessi Meileza, Marti Hitsmi, Rina Elvia, Lena Rahmidar, and Renat Khaydarov. "Smartphone Coupled with a Paper-Based Colorimetric Device for Sensitive and Portable Mercury Ion Sensing." Chemosensors 7, no. 2 (May 17, 2019): 25. http://dx.doi.org/10.3390/chemosensors7020025.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

The rapid development of information and communication technology provides an opportunity for scientists to develop a quantitative analytical method that is built on a mobile gadget as a detector. In this paper, we report a low-cost, simple and portable analytical method for mercury ion quantification based on digital image colorimetry coupled with a smartphone application. A small amount of silver nanoparticles (AgNPs) was used as a colorimetric agent that is selective only to mercury ions. The yellowish brown color of AgNPs instantly changed to colorless after the addition of mercury ions due to a redox reaction. To increase the portability, we attached the AgNPs onto a medium to create a paper-based analytical device. The final data processing of the colorimetric analysis was conducted using an android application available on the Google Play Store, called “Mercury Detector”. The proposed method has good sensitivity, with a detection limit of 0.86 ppb, which is comparable to those of bulk and more expensive instruments. This allows for the detection of mercury ions as low as 2 ppb (10 nM), which is also the maximum contaminant level permitted in drinking water by the US Environmental Protection Agency. The proposed method was applied to real samples that provide satisfactory results on accuracy (2.4%) and precision (2.5%).

41

Karthikeyan, J., P. Parameshwara, Nityananda Shetty, and Prakash Shetty. "Indirect complexometric determination of mercury(II) in synthetic alloys and complexes using ethanethiol as a selective masking agent." Journal of the Serbian Chemical Society 71, no. 3 (2006): 269–75. http://dx.doi.org/10.2298/jsc0603269k.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Acomplexometric method for the determination of mercury(II) in presence of other metal ions, based on the selective masking action of ethanethiol towards mercury( II) is described. Mercury(II) present in a given sample solution is first complexed with an excess of EDTAand the unreacted EDTAis titrated against zinc sulphate solution at pH 5-6 (hexamine buffer) using xylenol orange as the indicator. An excess of a 0.3 % solution of ethanethiol is then added to displace EDTA from the Hg(II)-EDTA complex. The released EDTAis titrated with a standard zinc sulphate solution. Reproducible and accurate results are obtained for 4-85 mg of mercury(II) with a relative error of less than +-0.46 % and coefficient of variation of not more than 0.47 %. The effects of the presence of various ions were studied. The method can be used for the analysis of mercury in its synthetic alloy mixtures and also in complexes.

42

Wells, Timothy N. C., Mark A. Payton, and Amanda E. I. Proudfoot. "Inhibition of Phosphomannose Isomerase by Mercury Ions." Biochemistry 33, no. 24 (June 1994): 7641–46. http://dx.doi.org/10.1021/bi00190a018.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Ding, Yangjun, Shasha Wang, Jinhua Li, and Lingxin Chen. "Nanomaterial-based optical sensors for mercury ions." TrAC Trends in Analytical Chemistry 82 (September 2016): 175–90. http://dx.doi.org/10.1016/j.trac.2016.05.015.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Prodi, Luca, Carlotta Bargossi, Marco Montalti, Nelsi Zaccheroni, Ning Su, Jerald S. Bradshaw, Reed M. Izatt, and Paul B. Savage. "An Effective Fluorescent Chemosensor for Mercury Ions." Journal of the American Chemical Society 122, no. 28 (July 2000): 6769–70. http://dx.doi.org/10.1021/ja0006292.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Zalups, R. K., and D. W. Barfuss. "Participation of mercuric conjugates of cysteine, homocysteine, and N-acetylcysteine in mechanisms involved in the renal tubular uptake of inorganic mercury." Journal of the American Society of Nephrology 9, no. 4 (April 1998): 551–61. http://dx.doi.org/10.1681/asn.v94551.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Mechanisms involved in the renal uptake of inorganic mercury were studied in rats administered a nontoxic 0.5 mumol/kg intravenous dose of inorganic mercury with or without 2.0 mumol/kg cysteine, homocysteine, or N-acetylcysteine. The renal disposition of mercury was studied 1 h after treatment in normal rats and rats that had undergone bilateral ureteral ligation. In addition, the disposition of mercury (including the urinary and fecal excretion of mercury) was evaluated 24 h after treatment. In normal rats, coadministering inorganic mercury plus cysteine or homocysteine caused a significant increase in the renal uptake of mercury 1 h after treatment. The enhanced renal uptake of mercury was due to increased uptake of mercury in the renal outer stripe of the outer medulla and/or renal cortex. Ureteral ligation caused reductions in the renal uptake of mercury in all groups except for the one treated with inorganic mercury plus N-acetylcysteine. Thus, it appears that virtually all of the mercury taken up by the kidneys of the normal rats treated with inorganic mercury plus N-acetylcysteine occurred at the basolateral membrane. Urinary excretory data also support this notion, in that the rate of excretion of inorganic mercury was greatest in the rats treated with inorganic mercury plus N-acetylcysteine. Our data also indicate that uptake of inorganic mercury in the kidneys of rats treated with inorganic mercury plus cysteine occurred equally at both luminal and basolateral membranes. In addition, the renal uptake of mercury in rats treated with inorganic mercury plus homocysteine occurred predominantly at the basolateral membrane with some component of luminal uptake. The findings of the present study confirm that there are at least two distinct mechanisms involved in the renal uptake of inorganic mercury, with one mechanism located on the luminal membrane and the other located on the basolateral membrane. Our findings also show that cysteine and homologs of cysteine, when coadministered with inorganic mercury, greatly influence the magnitude and/or site of uptake of mercuric ions in the kidney.

46

Darmadi, Darmadi, Irfan M, Iqhramullah M, Marlina Marlina, and Mirna Rahmah Lubis. "SYHNTHESIS OF CHITOSAN MODIFIED POLYURETHANE FOAM FOR ADSOPRTION OF MERCURY (II) IONS." Jurnal Bahan Alam Terbarukan 7, no. 1 (July 22, 2018): 18–27. http://dx.doi.org/10.15294/jbat.v7i1.13614.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

Mercury from the traditional gold mining activities in Aceh Jaya Regency causes water source and thus residents are exposed to mercury metals. In organic and inorganic conditions, mercury is toxic to the human body, causes damage to the nerve system, kidney failure, heart failure, blood pressure disorders, and damage to the immune system. The problem of mercury contamination can be chemically solved in various ways. This research uses polyurethane foam to adsorb mercury from water. The adsorption and selectivity of polyurethane foam adsorption can be improved through modification with Chitosan. In this research, preheating temperature, glycerol and toluene di-isocyanate (TDI) compositions greatly affect the physical form of foam. The condition under which optimal glycerol composition used for synthesizing the polyurethane foams is 20% (w/w of mixture A). This glycerol composition results in polyurethane foams with an optimum ratio of the mixture A/TDI/distilled water of 2 : 1 : 1. The best adsorption is obtained with polyurethane foam added by 2.5% Chitosan. The optimum mercury adsorption 25% is resulted from the operating time of 60 minutes with adsorption capacity of 0.313 mg/g. For Chitosan modified polyurethane foam, research points out that the reaction is the second order reaction. The result concluded that the polymer has semi crystalline crystallization and melting temperatures.

47

Scholz, Fritz, and Milivoj Lovrić. "The standard potentials of the electrode “dissolved atomic mercury/dissolved mercury ions”." Electroanalysis 8, no. 11 (November 1996): 1075–76. http://dx.doi.org/10.1002/elan.1140081118.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Qi, Guohua, Cuicui Fu, Gang Chen, Shuping Xu, and Weiqing Xu. "Highly sensitive SERS sensor for mercury ions based on the catalytic reaction of mercury ion decorated Ag nanoparticles." RSC Advances 5, no. 61 (2015): 49759–64. http://dx.doi.org/10.1039/c5ra08009f.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Maâtouk, Ferdaous, Mouna Maâtouk, Karima Bekir, Houcine Barhoumi, Abderrazak Maaref, and Hedi Ben Mansour. "An electrochemical DNA biosensor for trace amounts of mercury ion quantification." Journal of Water and Health 14, no. 5 (May 27, 2016): 808–15. http://dx.doi.org/10.2166/wh.2016.293.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

In this work we report the development of an electrochemical DNA biosensor with high sensitivity for mercury ion detection. A new matrix based on gold nanoparticles (AuNPs)-glutathione (GSH)/cysteine was investigated. The interaction between DNA oligonucleotides and Hg2+ ions followed by the formation of Thymine–Hg2+–Thymine (T–Hg2+–T) structures was quantified using different electrochemical methods. It has been shown that the electrochemical impedance spectroscopy (EIS) measurements and the differential pulse voltammetry (DPV) confirmed the specific interaction between the oligonucleotide receptor layer and the Hg2+ ions. Besides, the developed sensor exhibited high sensitivity towards mercury among some examined metal ions such as Pb2+, Cu2+ and Cd2+. As a result, a high electrochemical response and low detection limit of 50 pM were estimated in the case of Hg2+ ions. The developed DNA biosensor was applied successfully to the determination of Hg2+ions in wastewater samples.

50

Hashemi, Beshare, Mojtaba Shamsipur, Ali Javadi, Mohammad Kazem Rofouei, Abbas Shockravi, Narjes Tajarrod, and Nushin Mandumy. "Synthesis and characterization of ion imprinted polymeric nanoparticles for selective extraction and determination of mercury ions." Analytical Methods 7, no. 22 (2015): 9641–48. http://dx.doi.org/10.1039/c5ay02545a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Abstract:

In the present work we have prepared a novel Hg²⁺-ion imprinted polymer which has efficient analytical performance in pre-concentration of mercury. The proposed sorbent permits fast recognition of mercury ions in aqueous samples.

Journal articles on the topic 'Mercury Ions'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles