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DNA encapsulated chain and wire-like [small beta]-MnO2 organosol for oxidative polymerization of pyrrole to polypyrrole

01-Mar-2015 | Sivasankara Rao Ede; S Anantharaj; U Nithiyanantham; Subrata Kundu, Physical Chemistry Chemical Physics, 2015

DNA encapsulated chain and wire-like β-MnO2 organosol had been synthesized utilizing a two phase water-toluene extraction procedure at room temperature (RT). The β-MnO2 organosol was prepared by transferring KMnO4 and the DNA from aqueous solution separately to the organic (toluene) solvent by ...

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Photocatalytically active fluorinated nano-titania synthesized by microwave-assisted hydrothermal treatment

22-Feb-2015 | Author(s): A.A. Sadovnikov , A.E. Baranchikov , Y.V. Zubavichus , O.S. Ivanova , V.Y. Murzin , V.V. Kozik , V. ..., Journal of Photochemistry and Photobiology A: Chemistry, 2015

Publication date: 15 April–1 May 2015 Source:Journal of Photochemistry and Photobiology A: Chemistry, Volumes 303–304 Author(s): A.A. Sadovnikov , A.E. Baranchikov , Y.V. Zubavichus , O.S. Ivanova , V.Y. Murzin , V.V. Kozik , V.K. Ivanov Nanocrystalline fluorinated titania has been ...

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Effect of fluid velocity on radioactive ion retention by fluidized bed reactor

21-Feb-2015 | Mohamed Abdelaziz, Azza H. Ali, Hesham F. Elbakhshawangy, Sameh H. Othman, The Canadian Journal of Chemical Engineering, 2015

This study is concerned with the design, construction, simulation, and pre‐operation of a fluidized bed reactor for low level radioactive waste treatment by a new chelating resin. In this respect a new mathematical model is suggested to account for the effect of fluid velocity and to determine ...

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Single Chain Structure of a Poly(N-isopropylacrylamide) Surfactant in Water

20-Feb-2015 | Lauren J. Abbott; Ashley K. Tucker; Mark J. Stevens, Journal of Physical Chemistry B, 2015

We present atomistic simulations of a single PNIPAM–alkyl copolymer surfactant in aqueous solution at temperatures below and above the LCST of PNIPAM. We compare properties of the surfactant with pure PNIPAM oligomers of similar lengths, such as the radius of gyration and solvent accessible ...

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Complexity of Protein Energy Landscapes Studied by Solution NMR Relaxation Dispersion Experiments

20-Feb-2015 | Gennady Khirich; J. Patrick Loria, Journal of Physical Chemistry B, 2015

The millisecond time scale motions in ribonuclease A (RNase A) were studied by solution NMR CPMG and off-resonance R1ρ relaxation dispersion experiments over a wide pH and temperature range. These experiments identify three separate protein regions termed Cluster 1, Cluster 2, and R33, whose ...

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An Interconverting Family of Coordination Cages and a meso-Helicate; Effects of Temperature, Concentration, and Solvent on the Product Distribution of a Self-Assembly Process

20-Feb-2015 | William Cullen; Christopher A. Hunter; Michael D. Ward, Inorganic Chemistry, 2015

The self-assembly between a water-soluble bis-bidentate ligand L18w and Co(II) salts in water affords three high-spin Co(II) products: a dinuclear meso-helicate [Co2(L18w)3]X4; a tetrahedral cage [Co4(L18w)6]X8; and a dodecanuclear truncated-tetrahedral cage [Co12(L18w)18]X24 (X = BF4 or ClO4). ...

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Quick quantification of proteins by MALDI

18-Feb-2015 | Sung Hee Ahn, Jeong Won Kang, Jeong Hee Moon, Kwang Pyo Kim, Seong Hoon Lee, Myung Soo Kim, Journal of Mass Spectrometry, 2015

Previously, we reported that the matrix‐assisted laser desorption ionization spectrum of a peptide became reproducible when an effective temperature was held constant. Using a calibration curve drawn by plotting the peptide‐to‐matrix ion abundance ratio versus the peptide concentration in a ...

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Preparation of Ag/Au bimetallic nanostructures and their application in surface‐enhanced fluorescence

18-Feb-2015 | Jun Dong, Yanyan Ye, Wenhui Zhang, Zebin Ren, Yiping Huo, Hairong Zheng, Luminescence, 2015

Abstract An effective substrate for surface‐enhanced fluorescence, which consists of cluster Ag/Au bimetallic nanostructures on a copper surface, was synthesized via a multi‐stage galvanic replacement reaction of a Ag cluster in a chlorauric acid (HAuCl4) solution at room temperature. The ...

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Synthesis of Cu vanadate nanorods for visible‐light photocatalytic degradation of gentian violet

17-Feb-2015 | N. Lin, L. Z. Pei, T. Wei, H. Y. Yu, Crystal Research and Technology, 2015

Cu vanadate nanorods have been synthesized via the hydrothermal process using polymer polyvinyl pyrrolidone (PVP) as the surfactant. X‐ray diffraction (XRD) shows that the nanorods are composed of monoclinic Cu5V2O10 phase. Scanning electron microscopy (SEM) observation shows that the diameter ...

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Xanthan gum: A versatile biopolymer for biomedical and technological applications

16-Feb-2015 | Denise F. S. Petri, Journal of Applied Polymer Science, 2015

ABSTRACT Xanthan gum is an extracellular polymer produced mainly by the bacterium Xanthomonas campestris. Traditionally it plays an important role in industrial applications as thickener, emulsion stabilizer and it has been added to water‐based drilling fluids due to its pseudoplastic behavior ...

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