The merging of two mercury drops at very low kinetic energy is observed using fast, digital, and analog imaging techniques. Sequences showing the time evolution of the overall-surface shape as well as an amplified view of the contact region are shown. Qualitative and quantitative comparisons with computations of the Navier-Stokes equation with a free surface are made. In the model, the surface is tracked by a marker-chain method.

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The purpose of this study is to determine the influence of the temperature and reaction time on the thermal pyrolysis process of compact polystyrene residues based on the percentage of liquid obtained at a heating cup of 15 C min-1 and cooling system for the condensation of pyrolytic gases at 10 ° C. It worked with temperatures between 375 and 425 °C and times of 5 and 10 minutes. The results showed that the reaction time has no representative influence on the liquid fraction, while the temperature has a great importance in the liquid yield reaching a maximum contribution at 400 °C, after this the percentage of liquid oils tends to decrease by guiding the formation of the gas fraction. The maximum production was 81.4% with a kinematic viscosity of 1,026 mm2 s-1, relative density 0.9352, flash point 24 °C and a caloric power of 48.5 MJ kg-1. The mixture of aromatic hydrocarbons obtained, with carbon chains between C6 and C20, are present in 75% by mass.

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The present work shows the study of the distribution of current and electrochemical potential in the reinforcing steel by using as anode a layer of cement paste added with graphite powder and carbon fiber. The research was carried out on concrete slabs with w / c ratio of 0.5. Each slab is placed 12 steel rods. One of the slabs was contaminated with Cl- added in the mixing water 5% NaCl by weight. Was applied on each slab a layer thickness of 1cm conductive cement paste. Was measured current draw of each rod as well as the polarized potential. The use of a cement material conductive paste shows a good performance as anode in the PCCI reinforcing steel to achieve maintain polarized potential of-800mV.