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Mechanistic Studies of Silica Polymerization from Supersaturated Aqueous Solutions by Means of Time-Resolved Light Scattering

16-10-2014 | M. Kley; A. Kempter; V. Boyko; K. Huber, Langmuir, 2014

Silica polymerization in a supersaturated aqueous solution of sodium silicate is a fundamental mineralization process with broad relevance for technical applications as well as for biological processes. To contribute to a better understanding of the mechanism underlying the polymerization of ...

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Instrument-Free Control of the Standard Potential of Potentiometric Solid-Contact Ion-Selective Electrodes by Short-Circuiting with a Conventional Reference Electrode

15-10-2014 | Ulriika Vanamo; Johan Bobacka, Analytical Chemistry, 2014

A simple, instrument-free method to control the standard potential (E°) of potentiometric solid-contact ion-selective electrodes (SC-ISE) is described. In this method, the electrode potential of a SC-ISE is reset by short-circuiting the electrode with a metallic wire to a conventional Ag/AgCl/3 M ...

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A new three‐dimensional anionic cadmium(II) dicyanamide network

14-10-2014 | Qiang Li, Hui‐Ting Wang, Acta Crystallographica Section C, 2014

A new cadmium dicyanamide complex, poly[tetramethylphosphonium [μ‐chlorido‐di‐μ‐dicyanamido‐κ4N1:N5‐cadmium(II)]], [(CH3)4P][Cd(NCNCN)2Cl], was synthesized by the reaction of tetramethylphosphonium chloride, cadmium nitrate tetrahydrate and sodium dicyanamide in aqueous solution. In the crystal ...

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Metastability of Large Aggregates and Viscosity, and Stability of The Pearl Necklace Conformation After Organic Solvent Treatment Of Aqueous Hydrophobic Polyelectrolyte Solutions

14-10-2014 | Wafa Essafi; Wifek Raissi; Amira Abdelli; François Boué, Journal of Physical Chemistry B, 2014

Aggregates—a phenomenon still not understood—as well as the pearl-necklace-like chain conformation in aqueous solutions of hydrophobic polyelectrolytes are addressed here, using treatment by an organic solvent. The second appear to be at equilibrium in water. The first appear to be metastable, ...

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Alpha radiolysis of nitric acid and sodium nitrate with 4He2+ beam of 13.5MeV energy

13-10-2014 | Author(s): G. Garaix , L. Venault , A. Costagliola , J. Maurin , M. Guigue , R. Omnee , G. Blain , J. Vanden ..., Radiation Physics and Chemistry, 2014

Publication date: January 2015 Source:Radiation Physics and Chemistry, Volume 106 Author(s): G. Garaix , L. Venault , A. Costagliola , J. Maurin , M. Guigue , R. Omnee , G. Blain , J. Vandenborre , M. Fattahi , N. Vigier , P. Moisy A study of aqueous nitric acid solution alpha ...

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Bioactivity of pyridine-2-thiolato-1-oxide metal complexes: Bi(III), Fe(III) and Ga(III) complexes as potent anti-Mycobacterium tuberculosis prospective agents

12-10-2014 | Author(s): Ignacio Machado , Leonardo Biancolino Marino , Bruno Demoro , Gustavo A. Echeverría , Oscar E. Piro ..., European Journal of Medicinal Chemistry, 2014

Publication date: 24 November 2014 Source:European Journal of Medicinal Chemistry, Volume 87 Author(s): Ignacio Machado , Leonardo Biancolino Marino , Bruno Demoro , Gustavo A. Echeverría , Oscar E. Piro , Clarice Q.F. Leite , Fernando R. Pavan , Dinorah Gambino In the search for ...

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Phosphine‐Free, Low‐Temperature Synthesis of Tetrapod‐Shaped CdS and Its Hybrid with Au Nanoparticles

09-10-2014 | Yaping Du, Bo Chen, Zongyou Yin, Zhengqing Liu, Hua Zhang, Small, 2014

Tetrapod‐shaped CdS colloidal nanocrystals are synthesized using a facile, phosphine‐free synthesis approach at low temperature. The arm length and diameter of CdS tetrapods can be easily tuned by using different source of sulphureous precursors, i.e., sulfur powder, thioacetamide, and sodium ...

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Emulsification Based Liquid Microextraction Prior to Flame Atomic Absorption Spectrometry for Sensitive Determination of Copper in Water Samples

09-10-2014 | Mahdi Zahedi, Mir; Rahimi-Nasrabadi, Mehdi; Rai, Hossein; Mahdi Pourmortazavi, Seied; Banan, Alireza, Current Analytical Chemistry, 2014

Abstract: In this study emulsification based liquid microextraction (EBLME) was developed for preconcentration of Cu(II) using a redesigned dispersive liquid - liquid microextraction (DLLME). The procedure is based on an organic extraction solvent and aqueous solution of surfactant system ...

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A complex based on imidazole ionic liquid and copolymer of acrylamide and phenoxyacetamide modification for clay stabilizer

08-10-2014 | Pingli Liu, Lihua Zhou, Cheng Yang, Hong Xia, Yang He, Meilin Feng, Journal of Applied Polymer Science, 2014

ABSTRACT A complex system (AM/AA/APO‐EMIN) was obtained by poly (acrylamide‐co‐acrylic acid‐co‐N‐allyl‐2‐phenoxyacetamide) (AM/AA/APO) combining 1‐ethyl‐3‐methyl imidazolium tetrafluoroborate ([EMIM] [BF4]) for clay stabilizer by using acrylamide (AM), acrylic acid (AA) and ...

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Effect of Alkaline Electrolyzed Water as an Inhibitor of Enzymatic Browning in Red Delicious Apples

29-09-2014 | Mi Jeong Kim, Yen‐Con Hung, Journal of Food Biochemistry, 2014

Abstract Polyphenol oxidase (PPO) activity, hue angle, chroma and browning index (BI) of alkaline electrolyzed (EO) water‐treated apples were compared with apples treated with other anti‐browning agents (ascorbic acid, citric acid and sodium metabisulfite). Alkaline EO water was shown to ...

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