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An FITC‐BODIPY FRET Couple: Application to Selective, Ratiometric Detection and Bioimaging of Cysteine

24-10-2014 | Dong Hee Ma, Dokyoung Kim, Takuya Akisawa, Kyung‐Ha Lee, Kyong‐Tai Kim, Kyo Han Ahn, Chemistry - An Asian Journal, 2014

Abstract A novel FRET couple of fluorescein is disclosed, and it was readily constructed by conjugating an amino‐BODIPY dye, a new FRET donor, with fluorescein isocyanate. Its potential was demonstrated by a fluorescence sensing system for cysteine, which was prepared by introducing acryloyl ...

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Fluorescent sensors based on quinoline‐containing styrylcyanine: determination of ferric ions, hydrogen peroxide, and glucose, pH‐sensitive properties and bioimaging

23-10-2014 | Xiaodong Yang, Peiliang Zhao, Jinqing Qu, Ruiyuan Liu, Luminescence, 2014

ABSTRACT A novel styrylcyanine‐based fluorescent probe 1 was designed and synthesized via facile methods. Ferric ions quenched the fluorescence of probe 1, whereas the addition of ferrous ions led to only small changes in the fluorescence signal. When hydrogen peroxide was introduced into the ...

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Study on the solid phase extraction and spectrophotometric determination of cobalt with 5-(2-benzothiazolylazo)-8-hydroxyquinolene

21-10-2014 | Author(s): Alaa S. Amin, Arabian Journal of Chemistry, 2014

Publication date: November 2014 Source:Arabian Journal of Chemistry, Volume 7, Issue 5 Author(s): Alaa S. Amin A highly sensitive, selective and rapid method for the determination of cobalt based on the rapid reaction of cobalt(II) with 5-(2-benzothiazolylazo)-8-hydroxyquinolene BTAHQ and ...

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Dissecting the Dynamic Conformations of the Metamorphic Protein Lymphotactin

20-10-2014 | Sophie R. Harvey; Massimiliano Porrini; Albert Konijnenberg; David J. Clarke; Robert C. Tyler; Patrick R. R. Langrid ..., Journal of Physical Chemistry B, 2014

A mass spectrometer provides an ideal laboratory to probe the structure and stability of isolated protein ions. Interrogation of each discrete mass/charge-separated species enables the determination of the intrinsic stability of a protein fold, gaining snapshots of unfolding pathways. In ...

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Electrochemical Behavior of Nicotine at Unmodified Carbon Paste Electrode and Its Determination in a Set of Refilling Liquids for Electronic Cigarettes

16-10-2014 | Matěj Stočes, Ivan Švancara, Electroanalysis, 2014

Abstract In this manuscript, a carbon paste electrode (CPE) from traditional components has been used to study the electrochemical oxidation of nicotine and its feasibility to be performed at unmodified and otherwise untreated carbon paste in an effort to propose a simple voltammetric method ...

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Molar‐Mass Analysis of Dendrigraft Poly(l‐lysine) (DGL) Polyelectrolytes by SEC‐MALLS: The “Cornerstone” Refractive Index Increment

15-10-2014 | Barbara Maret, Agnès Crépet, Clément Faye, Laurent Garrelly, Catherine Ladavière, Macromolecular Chemistry and Physics, 2014

Dendrigraft poly(l‐lysine) (DGL) polyelectrolytes, obtained by iterative polycondensation of N‐trifluoroacetyl‐l‐lysine‐N‐carboxyanhydride, constitute very promising candidates in many biomedical applications. In order to get a better understanding of their structure–property relationships in ...

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Sensitive and selective colorimetric detection of Cu2+ in aqueous medium via aggregation of thiomalic acid functionalized Ag nanoparticles

14-10-2014 | Vairaperumal Tharmaraj; Jyisy Yang, Analyst, 2014

A simple and effective colorimetric method for determination of copper ion was developed in this work. In this method, thiomalic acid functionalized silver nanoparticles (TMA-AgNPs) were prepared and the changes of solution color, which induced by the aggregation of TMA-AgNPs in the presence of ...

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Enhanced amperometric sensing for direct detection of nitenpyram via synergistic effect of copper nanoparticles and nitrogen-doped graphene

12-10-2014 | Author(s): Xiaoya Dong , Ding Jiang , Qian Liu , En Han , Xinai Zhang , Xianping Guan , Kun Wang , Baijing Qiu, Journal of Electroanalytical Chemistry, 2014

Publication date: Available online 5 October 2014 Source:Journal of Electroanalytical Chemistry Author(s): Xiaoya Dong , Ding Jiang , Qian Liu , En Han , Xinai Zhang , Xianping Guan , Kun Wang , Baijing Qiu In this work, a novel electrochemical sensing platform has been designed for ...

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Emulsification Based Liquid Microextraction Prior to Flame Atomic Absorption Spectrometry for Sensitive Determination of Copper in Water Samples

09-10-2014 | Mahdi Zahedi, Mir; Rahimi-Nasrabadi, Mehdi; Rai, Hossein; Mahdi Pourmortazavi, Seied; Banan, Alireza, Current Analytical Chemistry, 2014

Abstract: In this study emulsification based liquid microextraction (EBLME) was developed for preconcentration of Cu(II) using a redesigned dispersive liquid - liquid microextraction (DLLME). The procedure is based on an organic extraction solvent and aqueous solution of surfactant system ...

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Selective Ligandless Cloud Point Extraction of Gold from Wastewater and ore Samples

09-10-2014 | Zia Mohammadi, Sayed; Mohammadnezhad, Mohsen; Afzali, Daryoush; Amiri, Asghar, Current Analytical Chemistry, 2014

Abstract: A selective and sensitive cloud point extraction procedure for the preconcentration of trace amounts of gold prior to their determination by flame atomic absorption spectrometry has been developed. The cloud point extraction method is based on the formation AuI3 and then entrapped ...

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