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Comprehensive study on critical micellar concentrations of sds in acetonitrile‐water solvents

04-Feb-2016 | Jana Šteflová, Martin Štefl, Sarah Walz, Michael Knop, Oliver Trapp, ELECTROPHORESIS, 2016

The critical micellar concentration (CMC) is one of the fundamental characteristics of surfactants and its determination is crucial for detail understanding of micelles formation. In this study the critical micellar concentration of sodium dodecyl sulfate (SDS) in presence of acetonitrile was ...

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Direct immersion solid‐phase microextraction with gas chromatography and mass spectrometry for the determination of specific biomarkers of human sweat in melted snow

03-Feb-2016 | Federico Dallo, Dario Battistel, Rossano Piazza, Jacopo Gabrieli, Jean‐Jacques Filippi, Nicolas Baldovini, Carlo Bar ..., Journal of Separation Science, 2016

To provide a reliable tool for investigating diffusion processes of the specific components of the human odor 3‐hydroxy‐3‐methylhexanoic acid and 3‐methyl‐3‐sulfanylhexan‐1‐ol through the snowpack, we developed and optimized an analytical method based on direct immersion solid‐phase ...

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Multiway analysis applied to time‐resolved chemiluminescence for simultaneous determination of paracetamol and codeine in pharmaceuticals

02-Feb-2016 | Ali Mokhtari, Nastaran Jafari Delouei, Mohsen Keyvanfard, Mohammad Abdolhosseini, Luminescence, 2016

Abstract This method is based on the enhancing effect of codeine (COD) and paracetamol (PAR) on the chemiluminescence (CL) reaction of Ru(phen)32+ with Ce(IV). In the batch mode, COD gives a relatively sharp peak with the highest CL intensity at 4.0s, whereas the maximum CL intensity of the ...

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Sensitive and selective fluorescent chemosensor for the detection of some organophosphorus pesticides using luminescent Eu(III) complex

31-Jan-2016 | Author(s): Hassan A. Azab, Rasha M. Kamel, Journal of Photochemistry and Photobiology A: Chemistry, 2016

Publication date: 1 May 2016 Source:Journal of Photochemistry and Photobiology A: Chemistry, Volume 321 Author(s): Hassan A. Azab, Rasha M. Kamel A new luminescent europium-o-(4-methoxy benzoyl) benzoic acid [o-(4-anisoyl)] complex in ethanol–water (5:5v/v) solution was used for ...

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Development and validation of a CE‐MS method for the targeted assessment of amino acids in urine

30-Jan-2016 | Karina T. Rodrigues, Djalila Mekahli, Marina F. M. Tavares, Ann Schepdael, ELECTROPHORESIS, 2016

A CE‐ESI‐MS method was developed and validated for the separation and quantitative analysis of amino acids in urine. Experimental parameters related to the CE‐MS interface, background electrolyte (BGE) and mass spectrometer (MS) settings were optimized providing a good separation of 27 amino ...

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Rapid Determination of Fast Protein Dynamics from NMR Chemical Exchange Saturation Transfer Data

28-Jan-2016 | Yina Gu, Alexandar L. Hansen, Yu Peng, Rafael Brüschweiler, Angewandte Chemie International Edition, 2016

Abstract Functional motions of 15N‐labeled proteins can be monitored by solution NMR spin relaxation experiments over a broad range of timescales. These experiments however typically take of the order of several days to a week per protein. Recently, NMR chemical exchange saturation transfer ...

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Determination of the Solid–Liquid Phase Diagram of the Binary System Propionic Acid/Water

28-Jan-2016 | Thouaïba Htira; Claudia Cogné; Emilie Gagnière; Denis Mangin, Journal of Chemical & Engineering Data, 2016

Solid–liquid phase diagram of the system water/propionic acid was achieved using two methods, the differential scanning calorimetry and a synthetic method. The liquidus curve is a simple eutectic diagram (89 wt % at 243 K) with an “S-shaped” form due to an inflection point (occurring at around ...

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A Ruthenium Complex/Carbon Nanotube Based Electrode as the First Electrochemical Sensor for Simultaneous Sensing of D‐Penicillamine, 6‐Thioguanine and Catecholamines

27-Jan-2016 | Mohammad Mazloum‐Ardakani, Mohammad Ali Sheikh‐Mohseni, Masoud Salavati‐Niasari, Electroanalysis, 2016

Abstract The electrochemical behavior of a synthesized Ru complex (RuL) was investigated at multiwalled carbon nanotubes modified carbon paste electrode. Some special properties of the electrochemical response of this modified electrode are suitable charge transfer rate, repeatability and ...

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Toward Understanding of Branching in RAFT Copolymerization of Methyl Methacrylate through a Cleavable Dimethacrylate

26-Jan-2016 | Shaoning Liang; Xiaohui Li; Wen-Jun Wang; Bo-Geng Li; Shiping Zhu, Macromolecules, 2016

We report the reversible addition–fragmentation chain transfer (RAFT) solution copolymerization of methyl methacrylate (MMA) with a cleavable divinyl comonomer, bis(2-methacryloyl)oxyethyl disulfide (BMAODS). 2-Cyano-2-propyldodecyl trithiocarbonate was used as a RAFT chain transfer agent and ...

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Electromembrane extraction of gonadotropin‐releasing hormone agonists from plasma and wastewater samples

22-Jan-2016 | Saeed Nojavan, Tina Bidarmanesh, Ali Mohammadi, Saeid Yaripour, ELECTROPHORESIS, 2016

In the present study, for the first time electromembrane extraction (EME) followed by high performance liquid chromatography (HPLC) coupled with ultraviolet (UV) detection was optimized and validated for quantification of four Gn‐RH agonist anticancer peptides (alarelin, leuprolide, buserelin ...

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