Results 61 to 70 of about 1,007,559 (192)

Diffusion-reaction modelling of the degradation of oil-well cement exposed to carbonated brine [PDF]

, 2017
The essential aspects of a diffusion-reaction model in development for the degradation process of oil-well cement exposed to carbonated brine are presented in this paper.
Carol, Ignacio, Llaudat, J., López, C.M., Martínez, A.   +3 more
core   +1 more source

Hydrothermally Synthesized ZnCr- and NiCr-Layered Double Hydroxides as Hydrogen Evolution Photocatalysts

Molecules
The layered double hydroxides (LDHs) of transition metals are of great interest as building blocks for the creation of composite photocatalytic materials for hydrogen production, environmental remediation and other applications. However, the synthesis of
Sergei A. Kurnosenko, Oleg I. Silyukov, Ivan A. Rodionov, Anna S. Baeva, Andrei A. Burov, Alina V. Kulagina, Silvestr S. Novikov, Irina A. Zvereva   +7 more
doaj   +1 more source

A Novel Method of Probing the Fractional Composition of Nanosystems

KONA Powder and Particle Journal, 2014
The article presents a comparison of the traditional methods to investigate the fractional composition of nanosized powders, namely atomic force microscopy (AFM), scanning electron microscopy (SEM), dynamic light ...
Alexander S. Kozlov, Alexandr K. Petrov, Gennady N. Kulipanov, Vladimir O. Aseyev   +3 more
doaj   +1 more source

Representing model inadequacy: A stochastic operator approach

, 2018
Mathematical models of physical systems are subject to many uncertainties such as measurement errors and uncertain initial and boundary conditions. After accounting for these uncertainties, it is often revealed that discrepancies between the model output
Morrison, Rebecca E, Moser, Robert D, Oliver, Todd A   +2 more
core   +1 more source

Improved magnesia for thermal control coatings [PDF]

, 1972
Formation of radiation-generated color centers using single crystals of magnesium oxide is discussed. Crystal structure of magnesium oxide is described.
Berggren, C. C., Levin, H., Peffley, W. M.   +2 more
core   +1 more source

Synthesis, Characterization and Copolymerization of N-(phenylamino)maleimide with MMA

E-Journal of Chemistry, 2007
The free radical copolymerization of N-(phenylamino)maleimide (N-PAMI) was carried. The copolymerization with methyl methacrylate (MMA) was performed at 65°C with AIBN as the initiator in THF solvent.
B. L. Hiran, S. N. Paliwal, Jyoti Choudhary, P. R. Choudhary   +3 more
doaj   +1 more source

Kinetic Isotope Effect in the Unfolding of a Protein Secondary Structure: Calculations for Beta-Sheet Polyglycine Dimers as a Model

Biomolecules
In the present work, we performed calculations of the kinetic isotope effect (KIE) on H/D, 14N/15N, 16O/18O, and 12C/13C isotopic substitution in the dissociation of beta-sheet polyglycine dimers of different lengths into two monomer chains.
Alexey O. Yanshin, Vitaly G. Kiselev, Alexey V. Baklanov   +2 more
doaj   +1 more source

Reactions at Polymer Interfaces: Transitions from Chemical to Diffusion-Control and Mixed Order Kinetics

, 1998
We study reactions between end-functionalized chains at a polymer-polymer interface. For small chemical reactivities (the typical case) the number of diblocks formed, $R_t$, obeys 2nd order chemically controlled kinetics, $R_t \sim t$, until interfacial ...
B O'Shaughnessy, D Vavylonis, Doi M., Friedman B., Kotomin E., O'Shaughnessy B., Scott C., Semenov A. N., Sperling L. H.   +8 more
core   +1 more source

Diffusion-Limited One-Species Reactions in the Bethe Lattice

, 2006
We study the kinetics of diffusion-limited coalescence, A+A-->A, and annihilation, A+A-->0, in the Bethe lattice of coordination number z. Correlations build up over time so that the probability to find a particle next to another varies from \rho^2 (\rho
Abramowitz M, ben-Avraham D, ben-Avraham D, Daniel ben-Avraham, Krug J, Kuzovkov V, Köhler G H, M Lawrence Glasser, Majumdar S N, Milne-Thomson L M, Raychaudhuri S   +10 more
core   +1 more source

Optimization and Evaluation of Drying Kinetics and Quality Attributes of Persimmon Using Infrared Dryer: Influence of Operational Parameters [PDF]

Iranian Journal of Chemistry & Chemical Engineering
The impact of infrared drying parameters on drying time and the qualitative characteristics of the persimmon was thoroughly investigated by varying sample thickness (3, 5, and 7 mm), air velocity (0.5, 1.25, and 2 m/s), and infrared power levels (1000 ...
Hasan Jamal Debaklou, Kamyar Movagharnejad, Fatemeh Jafari   +2 more
doaj   +1 more source