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On the fate of hydraulic fracturing fluid additives: Thermochemical sulfate reduction reaction of sodium dodecyl sulfate

13-Apr-2015 | Author(s): Payman Pirzadeh , Shaunak Raval , Robert A. Marriott, Organic Geochemistry, 2015

Publication date: June–July 2015 Source:Organic Geochemistry, Volumes 83–84 Author(s): Payman Pirzadeh , Shaunak Raval , Robert A. Marriott Hydraulic fracturing is a key technology for unlocking shale gas resources. While the compatibility and performance of fracturing fluid additives ...

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Thermodynamics of protein aqueous solutions: From the structure factor to the osmotic pressure

10-Apr-2015 | Luís Fernando Mercier Franco, Cristiano Luis Pinto de Oliveira, Pedro de Alcântara Pessôa Filho, AIChE Journal, 2015

Abstract An analytical expression for the structure factor for globular proteins in aqueous solution is presented in this work. This expression was obtained considering a potential given by the sum of a hard core, a van der Waals attractive and a screened Coulomb contribution. Experimental ...

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Bio-molecule Assisted Aggregation of ZnWO4 Nanoparticles (NPs) into Chain-like Assemblies: Material for High Performance Supercapacitor and as Catalyst for Benzyl Alcohol Oxidation

06-Apr-2015 | Sivasankara Rao Ede; Ananthakumar Ramadoss; U. Nithiyanantham; S. Anantharaj; Subrata Kundu, Inorganic Chemistry, 2015

ZnWO4 nanoparticles (NPs) that are assembled and aggregated together as chain-like morphology have been synthesized via the reaction of Zn(II) salt solution with sodium tungstate in the presence of the DNA scaffold under 5 min of microwave heating. The reaction parameters have been tuned to ...

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Interpolymer Complexation: Comparisons of Bulk and Interfacial Structures

01-Apr-2015 | Beatrice Cattoz; Wiebe M. de Vos; Terence Cosgrove; Martin Crossman; Youssef Espidel; Stuart W. Prescott, Langmuir, 2015

The interactions between the strong polyelectrolyte sodium poly(styrenesulfonate), NaPSS, and the neutral polymer poly(vinylpyrrolidone), PVP, were investigated in bulk and at the silica/solution interface using a combination of diffusion nuclear magnetic resonance spectroscopy (NMR), small-angle ...

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Synthesis, Crystal Structure, and Magnetic Properties of a Family of Undecanuclear [CuII9LnIII2] Nanoclusters

30-Mar-2015 | Wei‐Wei Kuang, Li‐Li Zhu, Li‐Cun Li, Pei‐Pei Yang, European Journal of Inorganic Chemistry, 2015

Abstract The syntheses, crystal structures, and magnetic properties of a novel family of heterometallic aggregates [CuII9LnIII2(μ3‐OH)8(mea)4(C3H7COO)4(NO3)2Cl6(MeOH)4(H2O)2]·3MeOH·2H2O [Ln = Eu (1), Gd (2), Tb (3), Dy (4)] are reported. The compounds were obtained by the direct reaction of ...

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Well‐Controlled Synthesis of Poly (phenylene sulfide) (PPS) Starting from Cyclic Oligomers

26-Mar-2015 | Syunsuke Horiuchi, Daisuke Yamamoto, Shu Kaiho, Kohei Yamashita, Makito Yokoe, Keiko Osato, Koji Yamauchi, Macromolecular Symposia, 2015

Summary The mixture of cyclic PPS oligomers (c‐PPS) with more than 99% of purity, less than 15 ppm of metal content and more than 4 of repeating units was prepared by the nucleophilic substitution reaction between dichlorobenzene (DCB) and sodium sulfide (Na2S) in relatively dilute solution. ...

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Preparation and modification of polythiophene–organic montmorillonite composite

26-Mar-2015 | Ying Ling, Jianping Long, Chun Huang, Polymer Composites, 2015

Polythiophene‐organic montmorillonite (PTP‐OMMT) composites were prepared via Fe3+‐H2O2 catalytic oxidation system at room temperature in water (medium) within the presence of sodium dodecyl benzene sulfonate. The PTP‐OMMT composite made from 2 g/ml solution of OMMT/TP with reacting for 12 h ...

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Analysis of a blast due to inadvertant mixing of ammonium sulfate and sodium hyplochlorite

26-Mar-2015 | Graeme W. Norval, Process Safety Progress, 2015

Ammonium sulfate and sodium hypochlorite are common industrial chemicals, often used together in water treatment. The consequences of mixing hypochlorite (chlorine) solution with ammonia solutions are well understood within the chlorine industry; detonable chloramines are produced. This ...

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Photoresponsive molecularly imprinted hydrogel casting membrane for the determination of trace tetracycline in milk

25-Mar-2015 | Qiang Wang, Zhen Lv, Qian Tang, Cheng‐Bin Gong, Michael Hon Wah Lam, Xue‐Bing Ma, Cheuk‐Fai Chow, Journal of Molecular Recognition, 2015

This study aimed to develop a photoresponsive molecularly imprinted hydrogel (MIH) casting membrane for the determination of trace tetracycline (TC) in milk. This MIH casting membrane combined the specificity of MIHs, the photoresponsive properties of azobenzene, and the portable properties of a ...

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Residues of different gel formulations on dentinal walls: A SEM/EDS analysis

24-Mar-2015 | Angela Longo do Nascimento, Fernanda Hoffmann Busanello, Marcus Vinícius Reis Só, Milton Carlos Kuga, Jefferson Rica ..., Microscopy Research and Technique, 2015

ABSTRACT The aim of this study was to evaluate the presence of residues of sodium hypochlorite gel, chlorhexidine gel, and EDTA gel on dentinal walls after canal preparation through chemical SEM‐ elemental chemical microanalysis (EDS) analysis. Forty‐eight single‐rooted teeth were selected. ...

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