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Tetrathiatriarylmethyl Radicals Conjugated to an RGD‐Peptidomimetic

14-11-2014 | Benoît Driesschaert, Philippe Levêque, Bernard Gallez, Jacqueline Marchand‐Brynaert, European Journal of Organic Chemistry, 2014

Abstract Tetrathiatriarylmethyl (TAM) radicals are favourite spin labels for electron paramagnetic resonance imaging (EPRI). In this work, we report a straightforward synthesis of new TAM radicals bound to an Arg‐Gly‐Asp (RGD)‐peptidomimetic known to be a cell‐targeting agent. These new ...

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Influence of Solution Volume on the Dissolution Rate of Silicon Dioxide in Hydrofluoric Acid

14-11-2014 | Boris Shvartsev, Danny Gelman, Ilia Komissarov, Alon Epshtein, David Starosvetsky, Yair Ein‐Eli, ChemPhysChem, 2014

Abstract Experimental data and modeling of the dissolution of various Si/SiO2 thermal coatings in different volumes of hydrofluoric acid (HF) are reported. The rates of SiO2‐film dissolution, measured by means of various electrochemical techniques, and alteration in HF activity depend on the ...

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A conceptual model for chemical product design

14-11-2014 | Fernando P Bernardo, Pedro M. Saraiva, AIChE Journal, 2014

Abstract The fundamental principles of chemical product design and associated systematic tools, within a broad domain of chemical products including molecules, formulations and devices, are still under development. In this paper, we propose a simple and fundamental conceptual model that ...

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Adsorption of Lysozyme on Silver and Its Influence on Silver Release

14-11-2014 | Xin Wang; Gunilla Herting; Inger Odnevall Wallinder; Eva Blomberg, Langmuir, 2014

Silver is increasingly used in antimicrobial coatings of biomedical devices and implants to hinder infections. As proteins have been shown to largely influence the extent of released metals from various metal surfaces at biological conditions, silver may also be influenced in the same way. The ...

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Kinetic Effects of Sulfur Oxidation on Catalytic Nitrile Hydration: Nitrile Hydratase Insights from Bioinspired Ruthenium(II) Complexes

14-11-2014 | Davinder Kumar; Tho N. Nguyen; Craig A. Grapperhaus, Inorganic Chemistry, 2014

Kinetic investigations inspired by the metalloenzyme nitrile hydratase were performed on a series of ruthenium(II) complexes to determine the effect of sulfur oxidation on catalytic nitrile hydration. The rate of benzonitrile hydration was quantified as a function of catalyst, nitrile, and water ...

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Nanostructured Lipid Carriers: Effect of Solid Phase Fraction and Distribution on the Release of Encapsulated Materials

14-11-2014 | Nily Dan, Langmuir, 2014

Emulsions, solid lipid nanoparticles (SLN), and nanostructured lipid carriers (NLC) containing a mix of liquid and solid domains are of interest as encapsulation vehicles for hydrophobic compounds. Studies of the release rate from these particles yield contradictory results: Some find that ...

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Arsenic-Rich Acid Mine Water with Extreme Arsenic Concentration: Mineralogy, Geochemistry, Microbiology, and Environmental Implications

14-11-2014 | Juraj Majzlan; Jakub Plášil; Radek Škoda; Johannes Gescher; Felix Kögler; Anna Rusznyak; Kirsten Küsel; Thomas R. Ne ..., Environmental Science & Technology, 2014

Extremely arsenic-rich acid mine waters have developed by weathering of native arsenic in a sulfide-poor environment on the 10th level of the Svornost mine in Jáchymov (Czech Republic). Arsenic rapidly oxidizes to arsenolite (As2O3), and there are droplets of liquid on the arsenolite crust with ...

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Local Hybrid QM/QM Calculations of Reaction Pathways in Metallobiosites

14-11-2014 | Milica Andrejić; Ricardo A. Mata, Journal of Chemical Theory and Computation, 2014

The accurate calculation of activation barriers is fundamental for the modeling of reaction pathways. However, the computational cost of describing electronic correlation at metal sites can be a deterrent. A possible solution to this problem is the use of hybrid QM/QM approaches, which combine ...

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Sensors, Vol. 14, Pages 21535-21548: Magnetic Bead-Based Colorimetric Immunoassay for Aflatoxin B1 Using Gold Nanoparticles

14-11-2014 | Wang, Xu ; Niessner, Reinhard ; Knopp, Dietmar, Sensors, 2014

A competitive colorimetric immunoassay for the detection of aflatoxin B1 (AFB) has been established using biofunctionalized magnetic beads (MBs) and gold nanoparticles (GNPs). Aflatoxin B1-bovine serum albumin conjugates (AFB-BSA) modified MBs were employed as capture probe, which could ...

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Molecules, Vol. 19, Pages 18705-18720: Removing Tannins from Medicinal Plant Extracts Using an Alkaline Ethanol Precipitation Process: A Case Study of Danshen Injection

14-11-2014 | Gong, Xingchu ; Li, Yao ; Qu, Haibin, Molecules, 2014

The alkaline ethanol precipitation process is investigated as an example of a technique for the removal of tannins extracted from Salviae miltiorrhizae Radix et Rhizoma for the manufacture of Danshen injection. More than 90% of the tannins can be removed. However, the recoveries of danshensu, ...

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