A Comparative Analysis of the Global Electrophilicity Power of Some Cationic Dyes. Understanding Selective Removal Dyes From Mixture Solution

Some bibliographic findings of dyes' adsorption from a mixture state suggest that certain dyes are more likely to be adsorbed first on the adsorbent surface than others, and therefore attracted strongly to the adsorbent surface. To explain the phenomenon, DFT calculations are applied. In this fact, the global electrophilicity index ω of some cationic dyes has been evaluated. The results show that, for studied electrophilic dyes, the molecule with the greatest global electrophilicity power is favored to be adsorbed on the surface's anionic sites. In addition, local electrophilic Parr and Fukui functions were introduced to characterize the most reactive adsorption sites properly and indicate successfully the same adsorption centers. The success of DFT calculations in explaining and predicting the selective dye was assessed.

Electromagnetics Properties of Non-Relativistic Deuteron in Ground State

Proton-neutron interaction that makes up deuteron is a mixture state of 𝑆13 dan 𝐷13, which are each associated with a state 𝐿=0, 𝑆=1 and 𝐿=2, 𝑆=1. In the proton-neutron interaction, there are particle exchanges of medium range (1 fm≤𝑟≤2 fm) i.e. scalar meson exchange and the long range (𝑟>2 fm) i.e. one pion exchange. The electromagnetic properties of non-relativistic deuteron in the ground state can be found from the coupled differential equation, such as magnetic dipole moment, 〈𝜇D〉=0.856521𝜇𝑁 and electrical quadrupole moment, 〈𝑄D〉=0.00291396 b.

Effect of Temperature on Critical Stress for Slip of Ti-Ni Shape Memory Alloy

This study describes the effect of temperature on critical stress for slip of Ti-Ni shape memory alloy. Tensile loading-unloading tests has been carried out using Ti-50.3at%Ni in the temperature range from 193K to 423K in order to investigate the temperature dependence of critical stress for slip of Ti-Ni shape memory alloy. The critical stress for slip is different in the three regions which are the martensitic single phase state in the range of 193K-273K, the mixture state of the martensitic and parent phases in the range of 273K-373K and the parent single phase state in the range of 373K-423K. The critical stress for slip of the martensitic single phase is about 200MPa. In the case of the mixture state of the martensitic and parent phases, the critical stress for slip increases with increasing temperature, and reaches the maximum stress of 652MPa at 373K. The critical stress for slip of the parent phase decreases with increasing temperature.