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Journal articles on the topic 'Ion chemistry and composition'

Author: Grafiati

Published: 10 March 2023

Last updated: 31 July 2025

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1

Ip, W. H. "Ion composition and chemistry." Advances in Space Research 9, no. 3 (1989): 141–50. http://dx.doi.org/10.1016/0273-1177(89)90253-6.

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2

Breig, E. L. "Thermospheric ion and neutral composition and chemistry." Reviews of Geophysics 25, no. 3 (1987): 455. http://dx.doi.org/10.1029/rg025i003p00455.

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3

Vuitton, V., R. V. Yelle, and P. Lavvas. "Composition and chemistry of Titan's thermosphere and ionosphere." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 367, no. 1889 (2008): 729–41. http://dx.doi.org/10.1098/rsta.2008.0233.

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Titan has long been known to harbour the richest atmospheric chemistry in the Solar System. Until recently, it had been believed that complex hydrocarbons and nitriles were produced through neutral chemistry that would eventually lead to the formation of micrometre sized organic aerosols. However, recent measurements by the Cassini spacecraft are drastically changing our understanding of Titan's chemistry. The Ion and Neutral Mass Spectrometer (INMS) and the Cassini Plasma Spectrometer (CAPS) revealed an extraordinary complex ionospheric composition. INMS detected roughly 50 positive ions with

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4

Johnston, Kathryn A., Lisa M. Stabryla, Ashley M. Smith, Xing Yee Gan, Leanne M. Gilbertson, and Jill E. Millstone. "Impacts of broth chemistry on silver ion release, surface chemistry composition, and bacterial cytotoxicity of silver nanoparticles." Environmental Science: Nano 5, no. 2 (2018): 304–12. http://dx.doi.org/10.1039/c7en00974g.

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We determine the impact of bacterial growth media on silver nanoparticle surface chemistry, this surface chemistry on silver ion release from the nanoparticles, and ultimately the antimicrobial implications of those parameters.

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Feistel, Rainer. "On the Physical Chemistry of Seawater with Deviating Ion Composition." Zeitschrift für Physikalische Chemie 204, Part_1_2 (1998): 27–44. http://dx.doi.org/10.1524/zpch.1998.204.part_1_2.027.

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6

Kishor, Arora, C. Goyal R., D. Agarwal D. та C. Pathak M. "Synthesis and spectral studies of thorium( IV) and dioxouranium(V) metal complexes with Schiff base ligandΨ". Journal of Indian Chemical Society Vol. 79, Aug 2002 (2002): 686–88. https://doi.org/10.5281/zenodo.5843399.

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Department of Chemistry, Government Autonomous K. R. G. College, Gwalior-474 001, India <em>E-mail : </em>kishorarora@rediffmail.com Department of Chemistry, Government P. G. College, Morena-476 001, India School of Studies in Chemistry, Jiwaji University, Gwalior-474 011, India Department of Chemistry, Government Autonomous Science College, Gwalior, India <em>Manuscript received 9 August 2001, revised 9 January 2002, accepted 5 April 2002</em> A series of new complexes of Schiff base 2-bromo-1<em>N</em>[4-N,N-bis(2'-cynoethylaminobenzalidene)Jaminobenzene (BCABAB) have been prepared from

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7

Vigren, Erik. "Analytic model of comet ionosphere chemistry." Astronomy & Astrophysics 616 (August 2018): A59. http://dx.doi.org/10.1051/0004-6361/201832704.

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Context. We consider a weakly to moderately active comet and make the following simplifying assumptions: (i) The partial ionization frequencies are constant throughout the considered part of the coma. (ii) All species move radially outward with the same constant speed. (iii) Ion-neutral reactions affect the chemical composition of the ions, but ion removal through dissociative recombination with free electrons is negligible. Aims. We aim to derive an analytical model for the radial variation of the abundances of various cometary ions. Methods. We present two methods for retrieving the ion comp

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Litvin, A., W. Kofman, and B. Cabrit. "Ion composition measurements and modelling at altitudes from 140 to 350 km using EISCAT measurements." Annales Geophysicae 16, no. 10 (1998): 1159–68. http://dx.doi.org/10.1007/s00585-998-1159-6.

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Abstract. This work aims at processing the data of CP1 and CP2 programs of EISCAT ionospheric radar from 1987 to 1994 using the "full profile" method which allows to solve the "temperature-composition" ambiguity problem in the lower F region. The program of data analysis was developed in the CEPHAG in 1995–1996. To improve this program, we implemented another analytical function to model the ion composition profile. This new function better reflects the real profile of the composition. Secondly, we chose the best method to select the initial conditions for the "full profile" procedure. A stati

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Verronen, P. T., E. Turunen, Th Ulich, and E. Kyrölä. "Modelling the effects of the October 1989 solar proton event on mesospheric odd nitrogen using a detailed ion and neutral chemistry model." Annales Geophysicae 20, no. 12 (2002): 1967–76. http://dx.doi.org/10.5194/angeo-20-1967-2002.

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Abstract. Solar proton events and electron precipitation affect the concentrations of middle atmospheric constituents. Ionization caused by precipitating particles enhances the production of important minor neutral constituents, such as nitric oxide, through reaction chains in which ionic reactions play an important role. The Sodankylä Ion Chemistry model (SIC) has been modified and extended into a detailed ion and neutral chemistry model of the mesosphere. Our steady-state model (containing 55 ion species, 8 neutral species, and several hundred chemical reactions) is used to investigate the e

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Yutkin, M. P., C. J. Radke, and T. W. Patzek. "Chemical Compositions in Salinity Waterflooding of Carbonate Reservoirs: Theory." Transport in Porous Media 136, no. 2 (2021): 411–29. http://dx.doi.org/10.1007/s11242-020-01517-7.

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AbstractHigher oil recovery after waterflood in carbonate reservoirs is attributed to increasing water wettability of the rock that in turn relies on complicated surface chemistry. In addition, calcite mineral reacts with aqueous solutions and can alter substantially the composition of injected water by mineral dissolution. Carefully designed chemical and/or brine flood compositions in the laboratory may not remain intact while the injected solutions pass through the reactive reservoir rock. This is especially true for a low-salinity waterflood process, where some finely tuned brine compositio

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Kalakoski, Niilo, Pekka T. Verronen, Annika Seppälä, Monika E. Szeląg, Antti Kero, and Daniel R. Marsh. "Statistical response of middle atmosphere composition to solar proton events in WACCM-D simulations: the importance of lower ionospheric chemistry." Atmospheric Chemistry and Physics 20, no. 14 (2020): 8923–38. http://dx.doi.org/10.5194/acp-20-8923-2020.

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Abstract. Atmospheric effects of solar proton events (SPEs) have been studied for decades, because their drastic impact can be used to test our understanding of upper stratospheric and mesospheric chemistry in the polar cap regions. For example, odd hydrogen and odd nitrogen are produced during SPEs, which leads to depletion of ozone in catalytic reactions, such that the effects are easily observed from satellites during the strongest events. Until recently, the complexity of the ion chemistry in the lower ionosphere (i.e., in the D region) has restricted global models to simplified parameteri

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12

Zhao, Chenglong, Qidi Wang, Zhenpeng Yao, et al. "Rational design of layered oxide materials for sodium-ion batteries." Science 370, no. 6517 (2020): 708–11. http://dx.doi.org/10.1126/science.aay9972.

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Sodium-ion batteries have captured widespread attention for grid-scale energy storage owing to the natural abundance of sodium. The performance of such batteries is limited by available electrode materials, especially for sodium-ion layered oxides, motivating the exploration of high compositional diversity. How the composition determines the structural chemistry is decisive for the electrochemical performance but very challenging to predict, especially for complex compositions. We introduce the “cationic potential” that captures the key interactions of layered materials and makes it possible t

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Odom, Robert W. "Molecular surface analysis by TOF-SIMS." Proceedings, annual meeting, Electron Microscopy Society of America 50, no. 2 (1992): 1556–57. http://dx.doi.org/10.1017/s0424820100132418.

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Time-of-flight secondary ion mass spectrometry (TOF-SIMS) performs surface sensitive analysis of the elemental and molecular composition of solids. TOFSIMS is a relatively new embodiment of static secondary ion mass spectrometry (SSIMS) in which the dose of primary ions incident on the surface is typically less than 1012 ions/cm2. Since typical solid surfaces have an atomic density of 1015 atoms/cm2, this primary ion dose nominally removes less than 0.1% of a monolayer. Hence, SIMS analyses performed under these static conditions represent near surface analysis in which secondary ions are prod

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Verronen, P. T., and R. Lehmann. "Analysis and parameterisation of ionic reactions affecting middle atmospheric HO<sub>x</sub> and NO<sub>y</sub> during solar proton events." Annales Geophysicae 31, no. 5 (2013): 909–56. http://dx.doi.org/10.5194/angeo-31-909-2013.

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Abstract. In the polar regions, precipitation of solar high-energy protons and electrons affects the neutral composition of the middle atmosphere. Here we use the Sodankylä Ion and Neutral Chemistry model to calculate ionic production and loss rates of neutral HOx and NOy species, imposed by particle precipitation, for a range of atmospheric conditions and levels of ionization. We also analyse in detail the ionic reaction sequences leading to the HOx and NOy changes. Our results show that particle impact ionization and positive ion chemistry cause net production of N, NO, HNO2, H, andOH from N

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15

Gopal, Chandra Bag, Mohondas Singh N., and Rajmuhon Singh N. "Conductance and ion association studies of diammine-bis-1-amidino-o-methylureacobalt(III) monochloride in methanol + water mixtures at different temperatures." Journal of Indian Chemical Society Vol. 78, June 2001 (2001): 294–97. https://doi.org/10.5281/zenodo.5878474.

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Department of Chemistry, Manipur University, Canchipur, Imphal-795 003, India <em>Fax</em>: 91-0385-221429 <em>Manuscript received 29 February 2000, revised 15 January 2001, accepted 16 January 2001</em> Conductance of diarnmine-bis-1-amidino-<em>o</em>-methylureacobalt(III) monochioride has been measured in water and varying water + methanol (W-M) mixtures at 5-40<sup>°</sup>. The limiting equivalent conductance (\(\Lambda_o\)) and the ion-association constant (<em>K</em><sub>A</sub>) for the complex salt in these mixtures have been evaluated using Shedlovsky equation. Based on the compos

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16

Bobonich, F. M. "Chemical composition and ion exchange properties of zeolites." Theoretical and Experimental Chemistry 26, no. 3 (1990): 355–59. http://dx.doi.org/10.1007/bf00641351.

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17

Wei, Hongyang, Xiujuan Liang, Shuhui Liu, Mingjun Liu, and Changlai Xiao. "Hydrochemical Evolution of Groundwater in Dehui, China." Water 12, no. 12 (2020): 3378. http://dx.doi.org/10.3390/w12123378.

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Although Dehui City has excellent agricultural conditions, long-term large-scale over-cultivation and human activities in recent years have caused significant changes in the local groundwater chemical characteristics. This study analyzes the causes, evolution, and prediction of groundwater chemistry via multi-disciplinary theoretical cross-cutting methods, such as groundwater ion composition-ratio analysis and groundwater influencing factor analysis, and artificial neural networks. The lithological characteristics of the groundwater aquifer were combined with ion composition-ratio mapping to e

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18

Cicconi, Maria Rita, Eric Pili, Lucie Grousset, and Daniel R. Neuville. "The Influence of Glass Composition on Iodine Solubility." MRS Advances 4, no. 17-18 (2019): 971–79. http://dx.doi.org/10.1557/adv.2018.665.

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AbstractTwo glass series in the ternary systems K2O-B2O3-SiO2 (KBS) and Na2O-B2O3-SiO2 (NBS) were studied in order to identify the main factors influencing the solubility of iodine. We established that iodine incorporation is strongly linked to the bulk chemistry, i.e. the SiO2/(B2O3+SiO2) molar ratio, and to the physical properties of the glasses, and we assessed three different solubility limits. Iodine in Si-rich glasses has a low solubility (≤1 mol% I) regardless of the alkali ion present. On the contrary, in B-rich glasses, the solubility is five times higher than in Si-rich glasses for N

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19

Mikhailov, A. V., and W. Kofman. "An interpretation of ion composition diurnal variation deduced from EISCAT observations." Annales Geophysicae 19, no. 3 (2001): 351–58. http://dx.doi.org/10.5194/angeo-19-351-2001.

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Abstract. Physical interpretation is made of the O+/Ne diurnal variations in summer, revealed by Litvine et al. (1998) from the EISCAT observations. It is shown that the observed anti-correlation between the Z50 parameter, corresponding to the transition region between 50% of molecular and atomic ions, and the width Dz of the transition, defined as the altitude width between 10% and 90% of the O+/Ne ratio, can be reproduced in model calculations and the result of different recombination laws (quadratic in the lower and linear in the upper ionosphere) as well as diurnal variations in the photo-

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20

Sadeghi, Rahmat. "Modification of the NRTL and Wilson models for the representation of phase equilibrium behavior of aqueous amino acid – electrolyte solutions." Canadian Journal of Chemistry 86, no. 12 (2008): 1126–37. http://dx.doi.org/10.1139/v08-166.

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The extended NRTL and Wilson local composition models for amino acid solutions have been modified for the representation of the phase equilibrium behavior of aqueous amino acid – electrolyte solutions by considering cells with random composition for the reference Gibbs energies or enthalpies of local composition cells with a central amino acid molecule and also with a central ion. These new local composition models, which have a molecular thermodynamic framework, have been used to model the vapor–liquid and solid–liquid equilibrium behavior of amino acids and small peptides in aqueous solution

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21

del Pozo, C. F., E. Turunen, and T. Ulich. "Negative ions in the auroral mesosphere during a PCA event around sunset." Annales Geophysicae 17, no. 6 (1999): 782–93. http://dx.doi.org/10.1007/s00585-999-0782-1.

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Abstract. This is a study of the negative ion chemistry in the mesosphere above Tromsø using a number of EISCAT observations of high energy proton precipitation events during the last solar maximum, and in particular around sunset on 23 October, 1989. In these conditions it is possible to look at the relative importance of the various photodetachment and photodissociation processes controlling the concentration of negative ions. The data analysed are from several UHF GEN11 determinations of the ion-plasma ACF together with the pseudo zero-lag estimate of the `raw' electron density, at heights

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22

Soldin, Željka, Boris-Marko Kukovec, Dubravka Matković-Čalogović, and Zora Popović. "The Solvent Effect on Composition and Dimensionality of Mercury(II) Complexes with Picolinic Acid." Molecules 26, no. 16 (2021): 5002. http://dx.doi.org/10.3390/molecules26165002.

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Three new mercury(II) coordination compounds, {[HgCl(pic)]}n (1), [HgCl(pic)(picH)] (2), and [HgBr(pic)(picH)] (3) (picH = pyridine-2-carboxylic acid, picolinic acid) were prepared by reactions of the corresponding mercury(II) halides and picolinic acid in an aqueous (1) or alcohol–methanol or ethanol (2 and 3) solutions. Two different types of coordination compounds were obtained depending on the solvent used. The crystal structures were determined by the single-crystal X-ray structural analysis. Compound 1 is a one-dimensional (1-D) coordination polymer with mercury(II) ions bridged by chela

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23

Allen, Jan L., Bria A. Crear, Rishav Choudhury, et al. "Fast Li-Ion Conduction in Spinel-Structured Solids." Molecules 26, no. 9 (2021): 2625. http://dx.doi.org/10.3390/molecules26092625.

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Spinel-structured solids were studied to understand if fast Li+ ion conduction can be achieved with Li occupying multiple crystallographic sites of the structure to form a “Li-stuffed” spinel, and if the concept is applicable to prepare a high mixed electronic-ionic conductive, electrochemically active solid solution of the Li+ stuffed spinel with spinel-structured Li-ion battery electrodes. This could enable a single-phase fully solid electrode eliminating multi-phase interface incompatibility and impedance commonly observed in multi-phase solid electrolyte–cathode composites. Materials of co

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Muzadi, Hasim, Nayla Zahra Kamalia, Titik Lestariningsih, and Yayuk Astuti. "Effect of LiTFSI Electrolyte Salt Composition on Characteristics of PVDF-PEO-LiTFSI-Based Solid Polymer Electrolyte (SPE) for Lithium-Ion Battery." Molekul 18, no. 1 (2023): 98. http://dx.doi.org/10.20884/1.jm.2023.18.1.6446.

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A lithium-ion battery with PVDF-PEO synthetic polymer sheet added by LiTFSI electrolyte salt has been made by assembling method. This study aims to determine the effect of LiTFSI salt concentration on the performance of lithium-ion batteries. The composition of LiTFSI electrolyte salts was varied into 5%; 10%; 15%; and 20%. Several characterizations were carried out to determine battery performance, including Electrochemical Impedance Spectrometry (ElS), Cyclic Voltammetry (CV), Charge/Discharge (CD), and Lithium Transference Number (LTN). The results showed that the synthesized separator shee

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Fuse, Yasufumi, Yusuke Ide, and Makoto Ogawa. "Composition-Dependent Ion-Exchange Reactivity of Potassium Lithium Titanates." Bulletin of the Chemical Society of Japan 81, no. 6 (2008): 767–72. http://dx.doi.org/10.1246/bcsj.81.767.

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26

Mohnen, Volker A., and Richard J. Vong. "A climatology of cloud chemistry for the eastern United States derived from the mountain cloud chemistry project." Environmental Reviews 1, no. 1 (1993): 38–54. http://dx.doi.org/10.1139/a93-005.

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The chemical composition of clouds collected in the eastern United States has been intensely monitored over a 4-year period as part of the Mountain Cloud Chemistry Project. On the basis of these measurements we prepared a climatology for cloud chemistry, using simple statistical analyses tools and incorporating meteorological and cloud physical and chemical information. Five mountain stations have been established for cloud collection covering the northern and southern Appalachian Mountain range: Whiteface Mountain, New York; Mount Moosilauke, New Hampshire; Shenandoah Mountain, Virginia; Whit

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27

Samulewski, Rafael Block, Josué Martins Gonçalves, Alexandre Urbano, et al. "Magnetite Synthesis in the Presence of Cyanide or Thiocyanate under Prebiotic Chemistry Conditions." Life 10, no. 4 (2020): 34. http://dx.doi.org/10.3390/life10040034.

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Magnetite is an iron oxide mineral component of primitive Earth. It is naturally synthesized in different ways, such as magma cooling as well as olivine decomposition under hydrothermal conditions. It is probable magnetite played a significant role in biogenesis. The seawater used in the current work contained high Mg2+, Ca2+ and SO42− concentrations, unlike the seawater of today that has high Na+ and Cl− concentrations. It is likely that this seawater better resembled the ion composition of the seas of the Earth from 4 billion years ago. Cyanide and thiocyanate were common molecules in prebio

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Zhou, Jiaxin, Fuyuan Gao, Ruiqi Yang, Chuancheng Zhao, and Qingfeng Li. "Major Ion Chemistry of Surface Water and Its Controlling Factors in Ebinur Lake Basin." Water 16, no. 19 (2024): 2780. http://dx.doi.org/10.3390/w16192780.

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The sustainable development of arid regions is significantly constrained by the availability of water resources, which play a crucial role in this context. It is necessary to deeply investigate and analyze the hydrochemical characteristics and major ion sources. This study, which was based on data from 183 water samples collected from the Jinghe River Basin, provided a comprehensive analysis of the river water hydrochemistry. The results show that the average TDSs (total dissolved solids) was measured at 49.8 mg·L−1. HCO3− (82.4%) and Ca2+ (77.1%) were the ions present in the highest abundance

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29

Yan, Tiejun, Ping Zhou, Fei Long, et al. "Unraveling the Difference in the Composition/Content of the Aroma Compounds in Different Tobacco Leaves: For Better Use." Journal of Chemistry 2022 (December 29, 2022): 1–10. http://dx.doi.org/10.1155/2022/3293899.

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The composition/content of aroma compounds in tobacco leaves in the different producing areas varies too much, and it is very meaningful to develop advanced analysis techniques to investigate the composition/content-producing area correlation. Here, gas chromatography-ion mobility spectroscopy (GC-IMS) was used to analyze the composition/content of aroma compounds in tobacco samples from eight different producing areas. With this technique, ion mobility spectrum, differential ion mobility spectrum, and fingerprint spectrum were constructed for two-dimensional analysis. Then, the principal comp

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Gallawa, Jessica Ruby, Jeffrey Ma, and Amy L. Prieto. "(Battery Student Slam 8 Award Winner) Evaluating Electrodeposited Tin and Antimony-Based Anodes for Sodium-Ion Batteries." ECS Meeting Abstracts MA2024-01, no. 5 (2024): 716. http://dx.doi.org/10.1149/ma2024-015716mtgabs.

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The widescale adaption of intermittent renewable energy sources, such as wind and solar, must be accompanied by a grid storage network to store energy when it is abundant and redistribute it as needed for on-demand use. Short-term storage in the form of rechargeable batteries is an attractive avenue for meeting these storage needs. The dominant technology in today’s market, the lithium-ion battery (LIB), is cost-prohibitive due to the need for rare-earth materials. Using the same working principle as LIBs, sodium-ion batteries (NIBs) utilize earth-abundant, low-cost sodium compounds instead of

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Truhlík, V., L. Trísková, and J. Šmilauer. "Manifestation of solar activity in the global topside ion composition − a study based on satellite data." Annales Geophysicae 23, no. 7 (2005): 2511–17. http://dx.doi.org/10.5194/angeo-23-2511-2005.

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Abstract. The solar cycle variation of the most important parameters characterizing the ion composition in the topside ionosphere is studied. For this purpose data from the ACTIVE mission (the IK-24 satellite) for the maximum of solar cycle 22 (aver F10.7~200), complemented by data available from the Atmosphere Explorer (AE) satellites, for the minimum of solar cycle 21 (average F10.7~85), were processed. OGO-6 data from the low maximum of solar cycle 20 (average F10.7~150) were used for medium solar activity conditions. The results for the equinox from the recently developed empirical model o

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Krämer, M., L. Schütz, W. Elbert, and N. Beltz. "Ion composition of cloud processed continental aerosol particles." Journal of Aerosol Science 31 (September 2000): 64–65. http://dx.doi.org/10.1016/s0021-8502(00)90071-5.

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Winograd, Nicholas. "Gas Cluster Ion Beams for Secondary Ion Mass Spectrometry." Annual Review of Analytical Chemistry 11, no. 1 (2018): 29–48. http://dx.doi.org/10.1146/annurev-anchem-061516-045249.

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Gas cluster ion beams (GCIBs) provide new opportunities for bioimaging and molecular depth profiling with secondary ion mass spectrometry (SIMS). These beams, consisting of clusters containing thousands of particles, initiate desorption of target molecules with high yield and minimal fragmentation. This review emphasizes the unique opportunities for implementing these sources, especially for bioimaging applications. Theoretical aspects of the cluster ion/solid interaction are developed to maximize conditions for successful mass spectrometry. In addition, the history of how GCIBs have become pr

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Baergen, Alyson M., Sarah A. Styler, Dominik van Pinxteren, Konrad Müller, Hartmut Herrmann, and D. James Donaldson. "Chemistry of Urban Grime: Inorganic Ion Composition of Grime vs Particles in Leipzig, Germany." Environmental Science & Technology 49, no. 21 (2015): 12688–96. http://dx.doi.org/10.1021/acs.est.5b03054.

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Lamhonwah, Daniel, M. J. Lafrenière, S. F. Lamoureux, and B. B. Wolfe. "Multi-year impacts of permafrost disturbance and thermal perturbation on High Arctic stream chemistry." Arctic Science 3, no. 2 (2017): 254–76. http://dx.doi.org/10.1139/as-2016-0024.

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Permafrost disturbances (such as active layer detachment (ALD) slides) and thermal perturbation (deep ground thaw from high soil temperatures) alter Arctic surface water chemistry. However, the potential multi-year impacts on water chemistry and the ultimate recovery time are not well understood. This study evaluates the impacts on surface waters and recovery following disturbance of a High Arctic catchment in 2007 from ALDs. We measured ion concentrations and stable isotopes in surface waters collected between 2006 and 2014 from paired catchments — one disturbed and the other not. The years 2

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Mikhailov, A. V., and K. Schlegel. "Geomagnetic storm effects at F1-layer heights from incoherent scatter observations." Annales Geophysicae 21, no. 2 (2003): 583–96. http://dx.doi.org/10.5194/angeo-21-583-2003.

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Abstract. Storm effects at F1-layer heights (160–200 km) were analyzed for the first time using Millstone Hill (mid-latitudes) and EISCAT (auroral zone) incoherent scatter (IS) observations. The morphological study has shown both increases (positive effect) and decreases (negative effect) in electron concentration. Negative storm effects prevail for all seasons and show a larger magnitude than positive ones, the magnitude of the effect normally increasing with height. At Millstone Hill the summer storm effects are small compared to other seasons, but they are well detectable. At EISCAT this su

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Hiraki, Y., Y. Kasai, and H. Fukunishi. "Chemistry of sprite discharges through ion-neutral reactions." Atmospheric Chemistry and Physics Discussions 8, no. 1 (2008): 2311–36. http://dx.doi.org/10.5194/acpd-8-2311-2008.

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Abstract. We estimate the concentration changes, caused by a single streamer in sprites, of ozone and related minor species as odd nitrogen (NOx) and hydrogen (HOx) families in the upper stratosphere and mesosphere. The streamer has an intense electric field and high electron density at its head where a large number of chemically-radical ions and atoms are produced through electron impact on neutral molecules. After propagation of the streamer, the densities of minor species can be perturbed through ion-neutral chemical reactions initiated by the relaxation of these radical products. We evalua

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Hiraki, Y., Y. Kasai, and H. Fukunishi. "Chemistry of sprite discharges through ion-neutral reactions." Atmospheric Chemistry and Physics 8, no. 14 (2008): 3919–28. http://dx.doi.org/10.5194/acp-8-3919-2008.

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Abstract. We estimate the concentration changes, caused by streamer discharge in sprites, of ozone and related minor species as odd nitrogen (NOx) and hydrogen (HOx) families in the upper stratosphere and mesosphere. The streamer has an intense electric field and high electron density at its head, where a large number of chemically-radical ions and atoms are produced through electron impact on neutral molecules. After its propagation, densities of minor species can be perturbed through ion-neutral chemical reactions initiated by the relaxation of these radical products. We evaluate the product

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Rubin, Martin, Kenneth C. Hansen, Tamas I. Gombosi, Michael R. Combi, Kathrin Altwegg, and Hans Balsiger. "Ion composition and chemistry in the coma of Comet 1P/Halley—A comparison between Giotto's Ion Mass Spectrometer and our ion-chemical network." Icarus 199, no. 2 (2009): 505–19. http://dx.doi.org/10.1016/j.icarus.2008.10.009.

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Naibova, T., K. Abbasova, and М. Janiyeva. "OBTAINING, RESEARCH AND APPLICATION OF ION EXCHANGER RESINS BASED ON COOLIGOMERS." Danish scientific journal, no. 72 (May 25, 2023): 23–26. https://doi.org/10.5281/zenodo.7997319.

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<strong>Abstract</strong> At present, the chemistry of high-molecular compounds is one of the fastest growing areas of independent science. In modern times, there is not a single area of human activity in which high-molecular compounds are not used. High-molecular compounds have existed since very ancient times. However, many believe that these compounds became known by chemists after obtaining them artificially or synthetically. This is not the right idea. Thus, while the synthetic production of member substances began at the beginning of the ⅪX century, high-molecular compounds were known ev

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R., K. Ghatuary, Kumar Mukhopadhyaya Alok, and K. Sarkar C. "Thin layer chromatographic separation of anions by naturally occurring mixed oxides impregnated plates." Journal of Indian Chemical Society Vol. 78, Sep 2001 (2001): 492–94. https://doi.org/10.5281/zenodo.5910692.

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Department of Chemistry, Vidyasagar College, Suri-731 101, India Department of E.T.C.E., Jadavpur University, Kolkata-700 032, India <em>Manuscript received 17 July 2000, revised 23 February 2001, accepted 31 March 2001</em> A naturally occurring clay mineral of the mixed oxides of silicon, aluminium, iron and titanium of composition SiO<sub>2</sub>, 45.70; Al<sub>2</sub>O<sub>3</sub>, 36.60; TiO<sub>2</sub>, 2.50; Fe<sub>2</sub>O<sub>3 </sub> , 1.21%, has been processed. Systematic separation of different anions by TLC plates coated with this natural inorganic io

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Lalrosanga and N. Mohondas Singh. "Thermodynamic Studies on Ion Association of Lithium Chloride and Lithium Nitrate in Acetonitrile + Water Mixed Solvents at Different Temperatures." Asian Journal of Chemistry 34, no. 1 (2021): 230–34. http://dx.doi.org/10.14233/ajchem.2022.23557.

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The present study reports the ion association of lithium chloride (LiCl) and lithium nitrate (LiNO3) electrolytes in acetonitrile + water (AN+W) mixtures at 283.15 K to 311.15 K. Their limiting molar conductance (Λo), the association constant values (KA) for their different mole fractions, i.e. 0.0000, 0.0588, 0.1233, 0.1942, 0.2727, 0.3600, 0.4576, 0.5676, 0.6923, 0.8351 and 1.0000 have been evaluated using Shedlovsky technique. The KA and Walden products (Λoηo) for LiCl and LiNO3 salts have been calculated in the acetonitrile-water solvent at experimental temperatures. The calculated values

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Shabbir, Hasan, Edit Csapó, and Marek Wojnicki. "Carbon Quantum Dots: The Role of Surface Functional Groups and Proposed Mechanisms for Metal Ion Sensing." Inorganics 11, no. 6 (2023): 262. http://dx.doi.org/10.3390/inorganics11060262.

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Carbon dots (CDs) are zero-dimensional nanomaterials composed of carbon and surface groups attached to their surface. CDs have a size smaller than 10 nm and have potential applications in different fields such as metal ion detection, photodegradation of pollutants, and bio-imaging, in this review, the capabilities of CDs in metal ion detection will be described. Quantum confinement is generally viewed as the key factor contributing to the uniqueness of CDs characteristics due to their small size and the lack of attention on the surface functional groups and their roles is given, however, in th

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Singh, S. K., Prashant K. Srivastava, M. Gupta, and S. Mukherjee. "Modeling mineral phase change chemistry of groundwater in a rural-urban fringe." Water Science and Technology 66, no. 7 (2012): 1502–10. http://dx.doi.org/10.2166/wst.2012.338.

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This research paper aims to determine the genetic origin of the chemical elements in groundwater. It deals with the results of physicochemical parameters, to evaluate the hydro-geochemistry of groundwater in rural-urban fringe of district Bareilly, India. Pre- and post-monsoon sampling has been carried out, which reveals inter-seasonal variability effect on the hydro-geochemical processes. Geochemical modeling especially computation of saturation index was undertaken using the WATEQ4F model. Majority of samples fall in the category of undersaturation, which further suggests that groundwater st

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Gopal, Chandra Bag, Mohondas Singh N. та Rajmuhon Singh N. "Ion association of α-alanine bis-biguanidecobalt(III) iodide in methanol + water mixtures at different temperatures". Journal of Indian Chemical Society Vol. 77, Mar 2000 (2000): 146–51. https://doi.org/10.5281/zenodo.5867384.

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Department of Chemistry, Manipur University, Canchipur, Imphal-795 003, India <em>Manuscript received 27 May 1999, revised 5 October 1999, accepted II November 1999</em> Conductivity measurements of α-alanine bis-biguanidecobalt(III) iodide have been made in water and varying water + methanol mixtures at 5-40°. The limiting equivalent conductance (\(\Lambda_O\)) and the ion association constant (<em>K</em><sub>A</sub>) for the complex salt in these mixtures have been evaluated using Shedlovsky equation. The <em>K</em><sub>A</sub>S obtained have minimum values at temperature <em>

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Haines, Robert I., and Sandra J. Northcott. "Kinetics and mechanism of oxidation of nickel(II) tetraazamacrocycles by the peroxydisulphate anion in aqueous and binary aqueous mixtures." Canadian Journal of Chemistry 70, no. 11 (1992): 2785–91. http://dx.doi.org/10.1139/v92-354.

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The kinetics of oxidation of several nickel(II) tetraazamacrocycles by the peroxydisulphate anion have been studied in water and in binary aqueous mixtures. The reactions proceed via an ion-pairing pre-equilibrium, followed by metal ion-assisted peroxy-bond fissure within the ion-pair solvent shell. The derived rate law is[Formula: see text]Ion-pairing constants have been determined and have been found to be little influenced by steric factors, but do depend on solvent composition. Rate constants have been extracted using the rate expression and activation energies have been estimated from tem

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Radhi, M., M. A. Box, G. P. Box, et al. "Size-resolved chemical composition of Australian dust aerosol during winter." Environmental Chemistry 8, no. 3 (2011): 248. http://dx.doi.org/10.1071/en10134.

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Environmental contextMineral dust aerosol is both an efficient scatterer of solar radiation, potentially cooling the planet, and a moderate absorber, potentially warming it: the exact balance is both uncertain, and geographically variable. Australian desert soils are noticeably more reddish than most Northern Hemisphere deserts, most probably a result of enhanced iron mineralogy. This paper contains results from a field campaign designed to increase our understanding of the chemistry of Australian mineral dust aerosol, especially in relation to iron and salt. AbstractAustralia is the dominant

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Mandt, K. E., A. Eriksson, A. Beth, M. Galand, and E. Vigren. "Influence of collisions on ion dynamics in the inner comae of four comets." Astronomy & Astrophysics 630 (September 20, 2019): A48. http://dx.doi.org/10.1051/0004-6361/201834828.

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Context. Collisions between cometary neutrals in the inner coma of a comet and cometary ions that have been picked up into the solar wind flow and return to the coma lead to the formation of a broad inner boundary known as a collisionopause. This boundary is produced by a combination of charge transfer and chemical reactions, both of which are important at the location of the collisionopause boundary. Four spacecraft measured ion densities and velocities in the inner region of comets, exploring the part of the coma where an ion-neutral collisionopause boundary is expected to form. Aims. The ai

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Nilsson, Elna J. K., and Annika Ahlberg Tidblad. "Gas Emissions from Lithium-Ion Batteries: A Review of Experimental Results and Methodologies." Batteries 10, no. 12 (2024): 443. https://doi.org/10.3390/batteries10120443.

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Gas emissions from lithium-ion batteries (LIBs) have been analysed in a large number of experimental studies over the last decade, including investigations of their dependence on the state of charge, cathode chemistry, cell capacity, and many more factors. Unfortunately, the reported data are inconsistent between studies, which can be explained by weaknesses in experimental methodologies, the misinterpretation of data, or simply due to the comparison of datasets that build on different prerequisites. In the present work, the literature on gassing from battery components and battery cells is re

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Odom, Robert W., and Martin L. Grossbeck. "In-depth and ion image analysis of minor and trace constituents in V–Cr–Ti alloy welds." Journal of Materials Research 11, no. 8 (1996): 1923–33. http://dx.doi.org/10.1557/jmr.1996.0243.

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This paper describes the application of dynamic secondary ion mass spectrometry (SIMS) to the study of the chemistry of welds in V–Cr–Ti alloys and presents preliminary data on the distribution of minor and trace elements (H, C, N, O, P, S, and C1) in welds produced by gas tungsten arc (GTA) and electron beam techniques. The motivation for this research is to develop techniques that determine correlations between the concentration and distribution of trace elements in alloy metal welds and the physical properties of the weld. To this end, quantitative SIMS techniques were developed for N, O, a

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