Intrinsic nitrogen vacancies can become catalytic centers for the ammonia synthesis reaction on Ta3N5via a Langmuir–Hinshelwood mechanism. Dinitrogen is activated in peculiar side sandwich-like configuration between two surface Ta atoms.

Dispersion-corrected periodic DFT calculations have been applied to elucidate the Langmuir−Hinshelwood (dissociative) and an Eley− Rideal/Mars−van Krevelen (associative) mechanism for ammonia synthesis over Co3Mo3N surfaces, in the presence of surface defects. Comparison of the two distinct mechanisms clearly suggests that apart from the conventional dissociative mechanism, there is another mec...

Titania pillared montmorillonite from Indonesian montmorillonite by using titanium isopropoxide as precursor was successfully prepared. Physico-chemical character of material by using x-ray diffraction, gas sorption analyzer, diffuse reflectance UV-Visible, scanning electron microscope (SEM) and energy dispersive x-ray (EDAX) showed the dipersion of titania in dominantly anatase phase that is t...

Mechanisms for epoxide reduction with hydrazine on a single-layer graphene sheet are examined using quantum mechanical calculations within the framework of gradient-corrected spin-polarized density-functional theory. We find that the reduction reaction is mainly governed by epoxide ring opening which is initiated by H transfer from hydrazine or its derivatives. In addition, our calculations sug...

<p style='text-indent:20px;'>A depletion-type reaction-diffusion Gierer-Meinhardt model with Langmuir-Hinshelwood reaction scheme and the homogeneous Neumann boundary conditions is introduced investigated in this paper. Firstly, boundedness of positive solution parabolic system given, constant steady state solutions are exhibited by Shengjin formulas. Through rigorous theoretical analysis...

This investigation constitutes a comparative study of the ribonucleic acid production during the course of growth at different temperatures of an obligate thermophile and a mesophile. A study of this nature aside from the quantitative data should provide information concerning the rate of ribonucleic acid production, the characteristic ribonucleic acid patterns obtained during the course of gro...

The degradation of an azo dye, Acid Black 1 (AB 1) with ZnO as photocatalyst using natural solar light in aqueous solution has been investigated under different conditions. The degradation is more with solar/ZnO process than with solar/TiO2-P25 process at pH 9. The influence of operational parameters such as the amount of photocatalyst, dye concentration and initial pH on photodegradation by Zn...

Dyslexia describes a condition first mentioned in English around the turn of the century (Morgan, 1896; Hinshelwood, 1900). Since then the characteristics, causes, and nature of the disability have been discussed by scores of investigators. However, a great deal of disagreement persists among educators, psychologists, clinicians, and physicians, as well as the general public (Reid, 1968). The p...