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Probing the common alkali metals affinity of native and variously methylated [small beta]-cyclodextrins by combining electrospray-tandem mass spectrometry and molecular modeling

01-Jul-2015 | Cédric Przybylski; Véronique Bonnet; Christine Cezard, Physical Chemistry Chemical Physics, 2015

In the study herein, we investigated the solution and gas phase affinity of native and variously methylated β-cyclodextrins (CDs) as hosts towards three common alkali metals as guests namely lithium, sodium and potassium. For this purpose, two complementary approaches have been employed: ...

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Ionic liquid and aqueous two‐phase extraction based on salting‐out coupled with high‐performance liquid chromatography for the determination of seven rare ginsenosides in Xue‐Sai‐Tong injection

17-Jun-2015 | Lan‐Jie Li, Yong‐Ri Jin, Xiao‐Zhong Wang, Ying Liu, Qian Wu, Xiao‐Lei Shi, Xu‐Wen Li, Journal of Separation Science, 2015

A method of ionic liquid salt aqueous two‐phase extraction coupled with high‐performance liquid chromatography has been developed for analysis of seven rare ginsenosides including Rg6, F4, 20(S)‐Rg3, 20(R)‐Rg3, Rk3, Rk1 and Rg5 in Xue‐Sai‐Tong injection. The injection was mixed with ionic liquid ...

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Materials, Vol. 8, Pages 3584-3606: Biomimetic Coating on Porous Alumina for Tissue Engineering: Characterisation by Cell Culture and Confocal Microscopy

17-Jun-2015 | Kolos, Elizabeth ; Ruys, Andrew J, Materials, 2015

In this study porous alumina samples were prepared and then coated using the biomimetic coating technique using a five times Simulated Body Fluid (5.0SBF) as the growth solution. A coating was achieved after pre-treatment with concentrated acid. From elemental analysis, the coating contained ...

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Cation-Specific Conformations in a Dual-Function Ion-Pumping Microbial Rhodopsin

17-Jun-2015 | Giordano F. Z. da Silva; Brandon R. Goblirsch; Ah-Lim Tsai; John L. Spudich, Biochemistry, 2015

A recently discovered rhodopsin ion pump (DeNaR, also known as KR2) in the marine bacterium Dokdonia eikasta uses light to pump protons or sodium ions from the cell depending on the ionic composition of the medium. In cells suspended in a KCl solution, DeNaR functions as a light-driven proton ...

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Synergistic effect between amino sulfonate amphoteric surfactant and octylphenol polyoxyethylene ether (10) in aqueous solutions with different acidicities: Consideration of different thermodynamic models

15-Jun-2015 | Zhao Hua Ren, Yue Luo, Yan Cheng Zheng, Ping Mei, Fan Xiu Li, Ding Po Shi, Journal of Chemical Technology & Biotechnology, 2015

Abstract The micellization behavior of binary mixtures constituted by sodium n‐dodecyl diamine sulfonate (C12AS) and octylphenol polyoxyethylene ether (10), OP‐10, in aqueous solutions at the pH of 3.5, 6.0, and 8.5 was investigated, and the values of mixed critical micelle concentration (CM) ...

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Modeling Protein–Micelle Systems in Implicit Water

15-Jun-2015 | Rodney E. Versace; Themis Lazaridis, Journal of Physical Chemistry B, 2015

Several membrane proteins and numerous membrane-active peptides have been studied in detergent micelles by solution NMR. However, the detailed structure of these complexes remains unknown. We propose a modeling approach that treats the protein and detergent in atomistic detail and the solvent ...

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Poly(thieno[3,4‐b]‐1,4‐oxathiane) and poly(3,4‐ethylenedioxythiophene‐co‐thieno[3,4‐b]‐1,4‐oxathiane)/poly(styrene sulfonic sodium): Preparation, characterization, and optoelectronic performance

12-Jun-2015 | Zhipeng Wang, Daize Mo, Shuai Chen, Jingkun Xu, Baoyang Lu, Qinglin Jiang, Zilan Feng, Jinhua Xiong, Shijie Zhen, Journal of Polymer Science Part A: Polymer Chemistry, 2015

ABSTRACT In this work, the asymmetrical analog of 3,4‐ethylenedioxythiophene (EDOT), thieno[3,4‐b]‐1,4‐oxathiane (EOTT), was synthesized and chemically polymerized first in aqueous solution using poly(styrene sulfonic sodium) (PSS) as the polyelectrolyte to yield ...

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ChemInform Abstract: Graphene‐Supported Substoichiometric Sodium Tantalate as a Methanol‐Tolerant, Non‐Noble‐Metal Catalyst for the Electroreduction of Oxygen.

11-Jun-2015 | David Sebastian, Vincenzo Baglio, Shuhui Sun, Ana C. Tavares, Antonino S. Arico, ChemInform, 2015

Abstract The graphene‐supported Na2Ta8O21‐x electrocatalyst (50 wt% Ta2O5, 50 wt% graphene) is obtained by sonicating graphene in an aqueous TaCl5 solution at pH 10.9 (adjusted with NaOH) followed by drying and heating under Ar (900 °C, 90 min).

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Room Temperature Cation Exchange Reaction in Nanocrystals for Ultrasensitive Speciation Analysis of Silver Ions and Silver Nanoparticles

10-Jun-2015 | Ke Huang; Kailai Xu; Jie Tang; Lu Yang; Jingrong Zhou; Xiandeng Hou; Chengbin Zheng, Analytical Chemistry, 2015

To evaluate the toxicity of silver nanoparticles (AgNPs) and Ag+ and gain deep insight into the transformation of AgNPs in the environment or organisms, ultrasensitive analytical methods are needed for their speciation analysis. About 40-fold of Cd2+ in CdTe ionic nanocrystals can be ...

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Redox-Controlled Ion-Pairing Association of Anionic Surfactant to Ferrocene-Terminated Self-Assembled Monolayers

08-Jun-2015 | Kim-Ly Nguyen; Eric R. Dionne; Antonella Badia, Langmuir, 2015

The redox-induced pairing from aqueous solution of a homologous series of sodium n-alkyl sulfate (NaCnSO4) surfactants of 6, 8, 10, and 12 carbons with gold-tethered self-assembled monolayers (SAMs) of ferrocenyldodecanethiolate (FcC12SAu) is investigated by cyclic voltammetry combined with ...

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