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Multielement NMR Studies of the Liquid–Liquid Phase Separation and the Metal-to-Nonmetal Transition in Fluid Lithium– and Sodium–Ammonia Solutions

13-09-2013 | Matthew T. J. H. Lodge; P. Cullen; Nicholas H. Rees; Neil Spencer; Kiminori Maeda; Jeffrey R. Harmer; Martin O. Jone ..., Journal of Physical Chemistry B, 2013

1H, 7Li, 14N, and 23Na high resolution nuclear magnetic resonance (NMR) measurements are reported for fluid solutions of lithium and sodium in anhydrous liquid ammonia across the metal-to-nonmetal transition (MNM transition), paying particular attention to the phenomenon of liquid–liquid phase ...

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A New Approach to Measuring Protein Backbone Protection with High Spatial Resolution Using H/D Exchange and Electron Capture Dissociation

12-09-2013 | Rinat R. Abzalimov; Cedric E. Bobst; Igor A. Kaltashov, Analytical Chemistry, 2013

Inadequate spatial resolution remains one of the most serious limitations of hydrogen/deuterium exchange-mass spectrometry (HDX-MS), especially when applied to larger proteins (over 30 kDa). Supplementing proteolytic fragmentation of the protein in solution with ion dissociation in the gas phase ...

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Simultaneous separation and determination of five organic acids in beverages and fruits by capillary electrophoresis using diamino moiety functionalized silica nanoparticles as pseudostationary phase

09-09-2013 | Author(s): Feng-Jie Liu , Guo-Sheng Ding , An-Na Tang, Food Chemistry, 2013

Publication date: 15 February 2014 Source:Food Chemistry, Volume 145 Author(s): Feng-Jie Liu , Guo-Sheng Ding , An-Na Tang A kind of novel diamino moiety functionalized silica nanoparticles with the diameter of ∼110nm was successfully prepared and characterised by transmission electron ...

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High‐Pressure Generator of Singlet Oxygen

06-09-2013 | V. Jirásek, M. Čenský, O. Špalek, J. Kodymová, Chemical Engineering & Technology, 2013

Abstract The generation of gaseous singlet oxygen by gas‐liquid reaction of chlorine with alkaline solution of hydrogen peroxide in spray form was studied experimentally on the originally designed device with a fast separation of reacted liquid from gas. The singlet oxygen yield, residual ...

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Ethyl diazoacetate synthesis in flow

05-09-2013 | Mariëlle M. E. Delville, Jan C. M. van Hest and Floris P. J. T. Rutjes, Beilstein Journal of Organic Chemistry, 2013

Abstract Ethyl diazoacetate is a versatile compound in organic chemistry and frequently used on lab scale. Its highly explosive nature, however, severely limits its use in industrial processes. The in-line coupling of microreactor synthesis and separation technology enables the synthesis of ...

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Inorganic anion-aided coordination of lanthanide metal ions to cucurbituril and supramolecular self-assembly: potential applications in the separation of light lanthanides

04-09-2013 | Yi Zhao; Li-Li Liang; Kai Chen; Ting Zhang; Xin Xiao; Yun-Qian Zhang; Zhu Tao; Sai-Feng Xue; Qian-Jiang Zhu, CrystEngComm, 2013

Linear coordination polymers have been assembled from lanthanide cations (Ln3+) and cucurbituril (Q[6]) in the presence of [CdCl4]2− or [ZnCl4]2− anions as inorganic structure inducers in HCl solution. X-ray diffraction analysis has revealed honeycomb-patterned supramolecular assemblies, in which ...

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Phase Equilibrium of the Quaternary System Na2SO4–MgSO4–(NH4)2SO4–H2O at 0 °C

04-09-2013 | Jing Zhang; Hong-Fei Guo; Ji-Lin Cao; Rui-Jie Fan, Journal of Chemical & Engineering Data, 2013

The solubilities of the ternary system MgSO4–(NH4)2SO4–H2O and the quaternary system Na2SO4–MgSO4–(NH4)2SO4–H2O at 0 °C were measured, and the phase diagrams of these two systems were plotted. On the basis of the phase diagrams obtained, we analyzed each saturation point and crystalline region. ...

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Effect of V doping concentration on the electronic structure, optical and photocatalytic properties of nano-sized V-doped anatase TiO2

02-09-2013 | Author(s): Matiullah Khan , Yunting Song , Ning Chen , Wenbin Cao, Materials Chemistry and Physics, 2013

Publication date: 15 October 2013 Source:Materials Chemistry and Physics, Volume 142, Issue 1 Author(s): Matiullah Khan , Yunting Song , Ning Chen , Wenbin Cao V-doped TiO2 with V/Ti ratio of 1–5% has been synthesized by hydrothermal method and then characterized by XRD, TEM, BET ...

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Complexation of Buffer Constituents with Neutral Complexation Agents: Part I. Impact on Common Buffer Properties

29-08-2013 | Martina Riesová; Jana Svobodová; Zdeněk Tošner; Martin Beneš; Eva Tesařová; Bohuslav Gaš, Analytical Chemistry, 2013

The complexation of buffer constituents with the complexation agent present in the solution can very significantly influence the buffer properties, such as pH, ionic strength, or conductivity. These parameters are often crucial for selection of the separation conditions in capillary ...

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Mathematical Model of Dynamic Crystallization of Ethylene/1‐Octene Copolymers

23-08-2013 | Nuttawat Chokputtanawuttilerd, Siripon Anantawaraskul, João B. P. Soares, Macromolecular Symposia, 2013

Summary Dynamic crystallization (DC) is a fractionation technique to enhance physical separation of polymers with different chain crystallizabilities by crystallizing polymer chains from solution in a column under a constant flow rate. In this work, a mathematical model for describing ...

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