Electrocopolymerization kinetics of a binary mixture of 3-chloroaniline 2-amino-4-phenylthiazole and characterization of the obtained block copolymer films

2005 ◽  
Vol 97 (5) ◽  
pp. 2076-2087 ◽  
Author(s):  
S. M. Sayyah ◽  
S. S. Abd EL-Rehim ◽  
M. M EL-Deeb
Keyword(s):  
Block Copolymer ◽  
Binary Mixture ◽  
Copolymer Films ◽  
Kinetics Of

Morphology-Controlled Kinetics of Solvent Uptake by Block Copolymer Films in Nonselective Solvent Vapors

2014 ◽  
Vol 3 (8) ◽  
pp. 803-807 ◽  
Author(s):  
Anja Stenbock-Fermor ◽  
Andrey A. Rudov ◽  
Rustam A. Gumerov ◽  
Larisa A. Tsarkova ◽  
Alexander Böker ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Copolymer Films ◽  
Solvent Uptake ◽  
Kinetics Of ◽  
Solvent Vapors

Electropolymerization kinetics of a binary mixture of pyrrole ando-aminobenzoic acid and characterization of the obtained polymer films

2008 ◽  
Vol 109 (3) ◽  
pp. 1643-1653 ◽  
Author(s):  
S. M. Sayyah ◽  
M. M. El-Rabiey ◽  
S. S. Abd El-Rehim ◽  
R. E. Azooz
Keyword(s):  
Binary Mixture ◽  
Polymer Films ◽  
Aminobenzoic Acid ◽  
Kinetics Of

3D characterization of block copolymer films for lithography

SPIE Newsroom ◽  
2016 ◽  
Author(s):  
Tamar Segal-Peretz ◽  
Jiaxing Ren ◽  
Paul F. Nealey
Keyword(s):  
Block Copolymer ◽  
Copolymer Films

scholarly journals Structural characterization of radiation‐grafted block copolymer films, using SANS technique

2008 ◽  
Vol 46 (16) ◽  
pp. 1660-1668 ◽  
Author(s):  
Kell Mortensen ◽  
Urs Gasser ◽  
Selmiye Alkan Gürsel ◽  
Günther G. Scherer
Keyword(s):  
Block Copolymer ◽  
Structural Characterization ◽  
Copolymer Films

Effect of Temperature on the Morphology and Kinetics of Surface Pattern Formation in Thin Block Copolymer Films

Langmuir ◽  
2007 ◽  
Vol 23 (24) ◽  
pp. 12380-12387 ◽  
Author(s):  
Archie P. Smith ◽  
Jack F. Douglas ◽  
Eric J. Amis ◽  
Alamgir Karim
Keyword(s):  
Block Copolymer ◽  
Pattern Formation ◽  
Surface Pattern ◽  
Effect Of Temperature ◽  
Copolymer Films ◽  
Kinetics Of

Electropolymerization kinetics of a binary mixture of o-phenylenediamine and 2-aminobenzothiazole and characterization of the obtained polymer films

2010 ◽  
Vol 119 (1) ◽  
pp. 252-264 ◽  
Author(s):  
S. M. Sayyah ◽  
S. S. Abd El-Rehim ◽  
S. M. Kamal ◽  
M. M. El-Deeb ◽  
R. E. Azooz
Keyword(s):  
Binary Mixture ◽  
Polymer Films ◽  
Kinetics Of

Irradiation behavior of pyrolytic silicon carbide

1983 ◽  
Vol 41 ◽  
pp. 72-73
Author(s):  
R. J. Lauf
Keyword(s):  
Silicon Carbide ◽  
Fission Products ◽  
Thermodynamics And Kinetics ◽  
Neutron Fluences ◽  
Fuel Particles ◽  
Sic Coatings ◽  
Irradiation Behavior ◽  
Kinetics Of ◽  
Htgr Fuel

Fuel particles for the High-Temperature Gas-Cooled Reactor (HTGR) contain a layer of pyrolytic silicon carbide to act as a miniature pressure vessel and primary fission product barrier. Optimization of the SiC with respect to fuel performance involves four areas of study: (a) characterization of as-deposited SiC coatings; (b) thermodynamics and kinetics of chemical reactions between SiC and fission products; (c) irradiation behavior of SiC in the absence of fission products; and (d) combined effects of irradiation and fission products. This paper reports the behavior of SiC deposited on inert microspheres and irradiated to fast neutron fluences typical of HTGR fuel at end-of-life.

Elaboration and Characterization of the Properties of Refractory Cr Base Alloys

2010 ◽  
Vol 72 ◽  
pp. 46-52 ◽  
Author(s):  
Laurent Royer ◽  
Stéphane Mathieu ◽  
Christophe Liebaut ◽  
Pierre Steinmetz
Keyword(s):  
Mechanical Properties ◽  
Melting Point ◽  
Molten Glass ◽  
Energy Production ◽  
Creep Properties ◽  
Refractory Alloys ◽  
Industrial Use ◽  
Kinetics Of ◽  
Selection Of

For energy production and also for the glass industry, finding new refractory alloys which could permit to increase the process temperatures to 1200°C or more is a permanent challenge. Chromium base alloys can be good candidates, considering the melting point of Cr itself, and also its low corrosion rate in molten glass. Two families of alloys have been studied for this purpose, Cr-Mo-W and Cr-Ta-X alloys (X= Mo, Si..). A finer selection of compositions has been done, to optimize their chemical and mechanical properties. Kinetics of HT oxidation by air, of corrosion by molten glass and also creep properties of several alloys have been measured up to 1250°C. The results obtained with the best alloys (Cr-Ta base) give positive indications as regards the possibility of their industrial use.

scholarly journals New Trimethoprim-Like Molecules: Bacteriological Evaluation and Insights into Their Action

Antibiotics ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 709
Author(s):  
Marta Jorba ◽  
Marina Pedrola ◽  
Ouldouz Ghashghaei ◽  
Rocío Herráez ◽  
Lluis Campos-Vicens ◽  
...  
Keyword(s):  
Inhibitory Concentration ◽  
Efflux Pump ◽  
Synergistic Effects ◽  
Nicotinamide Adenine Dinucleotide Phosphate ◽  
Detailed Characterization ◽  
Low Concentrations ◽  
Pump Activity ◽  
Bacteriological Evaluation ◽  
Kinetics Of

This work reports a detailed characterization of the antimicrobial profile of two trimethoprim-like molecules (compounds 1a and 1b) identified in previous studies. Both molecules displayed remarkable antimicrobial activity, particularly when combined with sulfamethoxazole. In disk diffusion assays on Petri dishes, compounds 1a and 1b showed synergistic effects with colistin. Specifically, in combinations with low concentrations of colistin, very large increases in the activities of compounds 1a and 1b were determined, as demonstrated by alterations in the kinetics of bacterial growth despite only slight changes in the fractional inhibitory concentration index. The effect of colistin may be to increase the rate of antibiotic entry while reducing efflux pump activity. Compounds 1a and 1b were susceptible to extrusion by efflux pumps, whereas the inhibitor phenylalanine arginyl β-naphthylamide (PAβN) exerted effects similar to those of colistin. The interactions between the target enzyme (dihydrofolate reductase), the coenzyme nicotinamide adenine dinucleotide phosphate (NADPH), and the studied molecules were explored using enzymology tools and computational chemistry. A model based on docking results is reported.

scholarly journals Simultaneous Kinetics of Selenite Oxidation and Sorption on δ-MnO2 in Stirred-Flow Reactors

2021 ◽  
Vol 18 (6) ◽  
pp. 2902
Author(s):  
Zheyong Li ◽  
Yajun Yuan ◽  
Lin Ma ◽  
Yihui Zhang ◽  
Hongwei Jiang ◽  
...  
Keyword(s):  
Rate Constant ◽  
Photoelectron Spectroscopy ◽  
Oxide Surfaces ◽  
Kinetic Rate Constant ◽  
Flow Reactors ◽  
Mn Oxide ◽  
Remediation Strategies ◽  
Process Of Se ◽  
Kinetics Of

Selenium (Se) is an essential and crucial micronutrient for humans and animals, but excessive Se brings negativity and toxicity. The adsorption and oxidation of Se(IV) on Mn-oxide surfaces are important processes for understanding the geochemical fate of Se and developing engineered remediation strategies. In this study, the characterization of simultaneous adsorption, oxidation, and desorption of Se(IV) on δ-MnO2 mineral was carried out using stirred-flow reactors. About 9.5% to 25.3% of Se(IV) was oxidized to Se(VI) in the stirred-flow system in a continuous and slow process, with the kinetic rate constant k of 0.032 h−1, which was significantly higher than the apparent rate constant of 0.0014 h−1 obtained by the quasi-level kinetic fit of the batch method. The oxidation reaction was driven by proton concentration, and its rate also depended on the Se(IV) influent concentration, flow rate, and δ-MnO2 dosage. During the reaction of Se(IV) and δ-MnO2, Mn(II) was produced and adsorbed strongly on Mn oxide surfaces, which was evidenced by the total reflectance Fourier transform infrared (ATR-FTIR) results. The X-ray photoelectron spectroscopy (XPS) data indicated that the reaction of Se(VI) on δ-MnO2 produced Mn(III) as the main product. These results contribute to a deeper understanding of the interface chemical process of Se(IV) with δ-MnO2 in the environment.

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