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Solubility of 3,7-Dinitro-1,3,5,7-tetraazabicyclo [3.3.1] Nonane in Ethanenitrile, Methanol, 1,1-Dichloroethane, Dimethyl Sulfoxide, Acetone, and Mixed Solvents

13-May-2015 | Min Xue; Siyu Wu; Wenjin Liu; Qiao Zhu; Zihui Meng; Zhihui Lin, Journal of Chemical & Engineering Data, 2015

The solubility of 3,7-dinitro-1,3,5,7-tetraazabicyclo [3.3.1] nonane (DPT) was measured in ethanenitrile, methanol, 1,1-dichloroethane, dimethyl sulfoxide (DMSO), acetone, ethyl acetate, ethyl acetate and methanol mixture, and acetonitrile and water mixture from 288.15 K to 308.15 K. In this ...

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Contactless Determination of Electrical Conductivity of One-Dimensional Nanomaterials by Solution-Based Electro-orientation Spectroscopy

13-May-2015 | Cevat Akin; Jingang Yi; Leonard C. Feldman; Corentin Durand; Saban M. Hus; An-Ping Li; Michael A. Filler; Jerry W. Shan, ACS Nano, 2015

Nanowires of the same composition, and even fabricated within the same batch, often exhibit electrical conductivities that can vary by orders of magnitude. Unfortunately, existing electrical characterization methods are time-consuming, making the statistical survey of highly variable samples ...

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Development and validation of a generic stability‐indicating MEEKC method for five fluoroquinolone antibiotics

12-May-2015 | Eliangiringa Kaale, Ludwig Höllein, Ulrike Holzgrabe, ELECTROPHORESIS, 2015

In this paper, a reliable stability‐indicating generic MEEKC method for the analysis of five commonly used fluoroquinolones (FQs) has been developed and optimised by a central composite circumscribed experimental design. The separation was carried out using a fused silica capillary (60.2 cm ...

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The effect of alkalization on the mechanical and water absorption properties of nonwoven kenaf fiber/unsaturated‐polyester composites produced by resin‐transfer molding

07-May-2015 | Dody Ariawan, Z.A. Mohd Ishak, M.S. Salim, R. Mat Taib, M.Z. Ahmad Thirmizir, H. Pauzi, Polymer Composites, 2015

In the present study, mechanical and water absorption properties of the nonwoven kenaf fiber (KF)/unsaturated‐polyester composites manufactured by resin transfer molding were investigated. Nonwoven KF mats with an aerial density of 1350 g/m2 were treated with a 6% NaOH solution for 3 h. The ...

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Aqueous Biphasic Systems Composed of Ionic Liquids and Acetate-Based Salts: Phase Diagrams, Densities, and Viscosities

07-May-2015 | Maria V. Quental; Helena Passos; Kiki A. Kurnia; João A. P. Coutinho; Mara G. Freire, Journal of Chemical & Engineering Data, 2015

Ionic-liquid-based aqueous biphasic systems (IL-based ABS) have been largely investigated as promising extraction and purification routes. In this context, the determination of their phase diagrams and the physical properties of the coexisting phases are of high relevance when envisaging their ...

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Development of a chromatographic low pressure flow injection system using amperometric detection: Application to the analysis of niacin in coffee

03-May-2015 | Author(s): João Rodrigo Santos , António O.S.S. Rangel, Food Chemistry, 2015

Publication date: 15 November 2015 Source:Food Chemistry, Volume 187 Author(s): João Rodrigo Santos , António O.S.S. Rangel In this work, an analytical flow system able to perform low pressure chromatography with amperometric detection is presented. As case study, the determination of ...

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Chiral ligand-exchange separation and determination of malic acid enantiomers in apple juice by open-tubular capillary electrochromatography

03-May-2015 | Author(s): Cemil Aydoğan , Veyis Karakoç , Adil Denizli, Food Chemistry, 2015

Publication date: 15 November 2015 Source:Food Chemistry, Volume 187 Author(s): Cemil Aydoğan , Veyis Karakoç , Adil Denizli This study describes the application of an open tubular capillary column for chiral ligand-exchange separation and determination of malic acid enantiomers in apple ...

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Improvement of reproducibility and sensitivity by reducing matrix effect in micellar electrokinetic chromatography for determination of amino acids in turtle jelly

27-Apr-2015 | Lin‐Qiu Li, Yue Cai, Mei Yang, Qing Shen, Ka‐Ming Yu, Hon‐Yeung Cheung, ELECTROPHORESIS, 2015

Matrix effect (ME) is commonly seen in electrophoretic separation, but this phenomenon lacks any systematic study. Our work aimed to find out the relationship between separation efficiency and current, and then figure out an effective, simple, and economic solution to overcome the negative ...

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Meaning and Measurability of Single‐Ion Activities, the Thermodynamic Foundations of pH, and the Gibbs Free Energy for the Transfer of Ions between Dissimilar Materials

27-Apr-2015 | Alan L. Rockwood, ChemPhysChem, 2015

Abstract Considering the relationship between concentration and vapor pressure (or the relationship between concentration and fugacity) single‐ion activity coefficients are definable in purely thermodynamic terms. The measurement process involves measuring a contact potential between a ...

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Interactions between nanoparticles and lung surfactant investigated by matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry

24-Apr-2015 | Tashi Chhoden, Per Axel Clausen, Søren T. Larsen, Asger W. Nørgaard, Frants R. Lauritsen, Rapid Communications in Mass Spectrometry, 2015

Rationale Inhaled nanoparticles may cause adverse effects due to inactivation of lung surfactants. We have studied how three different nanoparticles interact with dipalmitoyl‐phosphatidylcholine (DPPC), the main component in lung surfactant. Methods DPPC in solution was mixed with a ...

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