In this study, density functional theory calculations were performed to investigate the influence of oxygen preoccupation on the nitrogen oxide decomposition on rhodium. Besides gauging the coverage dependence of the adsorption energy of NO on the (111) rhodium facet, the influence of the initial oxygen coverage on the kinetics and thermodynamics of the nitrogen oxide decomposition reaction was...

INTRODUCTION ...................................... 43 DENITRIFYING BACTERIA .......... ............................ 43 PHYSIOLOGY AND BIOCHEMISTRY...................................... 45 Nitrate Reductase ...................................... 46 Nitrite Reductase ........... ................................... 46 Nitric Oxide Reductase...................................... 47 Nitrous Oxide R...

We investigate the electronic structure of carbon and nitrogen impurities, which are commonly incorporated during atomic-layer deposition of high-j oxides such as Al2O3 and HfO2. The impact on metal-oxide-semiconductor devices is assessed by examining formation energies, transition levels, and band alignment between the oxide and semiconductors such as GaN, Si, and III-As. Carbon introduces cha...

Exposure to stressful stimuli causes activation of the hypothalamic-pituitary-adrenal axis which rapidly releases high concentrations of glucocorticoid stress hormones, resulting in increased cellular metabolism and spontaneous oxygen and nitrogen radical formation. High concentrations of nitrogen radicals, including nitric oxide, cause damage to cellular proteins in addition to inhibiting comp...

Continuous postoperative nocturnal pulse oximetry was performed in 20 patients undergoing elective cholecystectomy to examine if the composition of anaesthetic gas mixtures affects postoperative gas exchange. The patients were allocated randomly to receive either nitrogen or nitrous oxide during anaesthesia, and oximetry was performed on the night before operation and the first and third nights...

Nitric oxide (nitrogen monoxide; NO) is a simple molecule with diverse biological functions. NO and related reactive nitrogen oxide species (RNOS) mediate intricate physiological and pathophysiological effects in the central nervous system. Depending on environmental conditions, NO and RNOS can initiate and mediate neuroprotection or neurotoxicity either exclusively or synergistically with othe...

Oxygen is a strong poison for the catalytic synthesis of ammonia from Nz + Hz over iron catalysts. On the other hand the formation of nitride in the surface region of iron samples provides protection against corrosion by oxygen. Surface analysis by means of Auger spectroscopy reveals that preadsorption of oxygen blocks the surface sites for dissociative nitrogen chemisorption. If on the other h...

Francisco J. R am írez Departamento de Qui'mica-Ffsica, Facultad de Ciencias, Universidad de Malaga, 29071 Malaga, Spain and M artin J. Bukovac Department of Horticulture, Michigan State University, East Lansing, MI 48824, U.S.A. Z. Naturforsch. 48c, 666-668 (1993); received February 16/April 6,1993 Lycopersicon esculentum, Plant Cuticle, Nitrogen Oxide, FT-IR Analysis Nitrogen oxide binding to...