The mobility of O atoms at very low temperatures is not generally taken into account, despite O diffusion would add to a series of processes leading to the observed rich molecular diversity in space. We present a study of the mobility and reactivity of O atoms on an amorphous silicate surface. Our results are in the form of reflection absorption infrared spectroscopy and temperature-programmed ...

The hands are one of the most susceptible parts human body to bacterial infection. One way maintain health is hand hygiene. Ethanolic rambutan rind extract from Aceh province has been studied in order determine if it can inhibit growth. This research was conducted antiseptic activity ethanol against Stahpylococcus aureus by determining phenol coefficient and whether ethanolic Aceh’s be formulat...

OH radicals play a key role as an intermediate in the water formation chemistry of the interstellar medium. For example the reaction of OH radicals with H2 molecules is among the final steps in the astrochemical reaction network starting from O, O2, and O3. Experimentally it was shown that even at 10 K this reaction occurs on ice surfaces. As the reaction has a high activation energy only atom ...

8 Kinetics of the catalytic dehydration of 1-butanol to di-n-butyl ether (DNBE) over 9 Amberlyst-70 was investigated. Experiments were performed in liquid phase at 4 MPa and 10 413-463 K. Three elementary reaction mechanisms were considered: a Langmuir‐Hinselwood‐ 11 Hougen‐Watson (LHHW) formulation; an Eley-Rideal (ER) formulation in which DNBE 12 remains adsorbed; an ER formulation in which w...

In recent years, due to improvements in calculation methods and increased computer power, it has become possible to perform first-principles investigations for ‘simple’ chemical reactions at surfaces. We have carried out such studies for the catalytic oxidation of CO at transition metal surfaces, in particular, at the ruthenium surface for which unusual behavior compared to other transition met...

SiO2/V2O5/TiO2 catalysts were synthesized for removing elemental mercury (Hg0) from simulated coal-combustion flue gas. Experiments were carried out in fixed-bed reactors using both pellet and powder catalysts. In contrast to the SiO2-TiO2 composites developed in previous studies, the V2O5 based catalysts do not need ultraviolet light activation and have higher Hg0 oxidation efficiencies. For H...