We reconsider H2 formation on grain surfaces. We develop a rate equation model which takes into account the presence of both physisorbed and chemisorbed sites on the surface, including quantum mechanical tunnelling and thermal diffusion. In this study, we took into consideration the uncertainties on the characteristics of graphitic surfaces. We calculate the H2 formation efficiency with the Lan...

present series of cases of peritonitis complicating acute appendicitis. The available biochemical evidence points to an obstructive pattern of jaundice without signs of extrahepatic block. This indicates that the jaundice is of the cholestatic type: and, as suggested by Eley et al. (1965), this is possibly a hepatotoxic effect of the infecting organism, which was E. coli in most of the previous...

Mary-Ann Davies, MD, MMed,* Harry Moultrie, MD, MSc,† Brian Eley, BSc (Hons), MD,‡ Helena Rabie, MD, MMed,§ Gilles Van Cutsem, MD, DTM&H, MPH,*k Janet Giddy, MD, DipPHCEd, MMed,¶ Robin Wood, BSc, BM, MD, MMed,# Karl Technau, MD, DCH, Dip HIV Man, MSc,** Olivia Keiser, PhD,†† Matthias Egger, MD, MSc, DTM&H,†† and Andrew Boulle, MD, PhD* for the International Epidemiologic Databases to Evaluate A...

This work deals with kinetics and chemical equilibrium studies of esterification reaction of ethanol with acetic acid.  The esterification reaction was catalyzed by an acidic ion exchange resin (Amberlyst-15) using a batch stirred tank reactor. The pseudo-homogenous and Eley-Rideal models were successfully fitted with experimental data. At first, Eley-Rideal model was examined for heterogeneous...

Eley-Rideal reaction mechanism is studied over rough surface of random deposition model. Two types of rough surface are considered: (1) different rough surface with same surface density and (2) different rough surface with different surface density. Dynamic scaling theory, which is generally applied to the growing surface, is applied for this reaction mechanism to obtain the temporal and spatia...

The activation of oxygen molecules is an important issue in the gold-catalyzed partial oxidation of alcohols in aqueous solution. The complexity of the solution arising from a large number of solvent molecules makes it difficult to study the reaction in the system. In this work, O2 activation on an Au catalyst is investigated using an effective approach to estimate the reaction barriers in the ...

The deuterium-to-hydrogen ratio (D/H) in water found in the coma of Jupiter family comet (JFC) 67P/ Churyumov–Gerasimenko was reported to be (5.3±0.7)×10, the highest among comets and three times the value for other JFCs with an ocean-like ratio. This discrepancy suggests the diverse origins of JFCs and clouds the issue of the origin of Earth’s oceanic water. Here we demonstrate that Eley–R...

Direct or Eley-Rideal reactions between energetic N^{+} and O^{+} projectiles and O atoms, adsorbed onto Pt and Pd surfaces, are studied experimentally at incidence energies between 20 and 200 eV. The exit energies of the diatomic molecular products NO and O_{2} depend linearly on the incidence energy of the corresponding projectiles. A reaction mechanism is proposed, where the incident project...