Introduction Lean NOx Trap (LNT) catalysts are viable catalysts for the abatement of NOx emissions from lean–burn engines [1]. These systems work under periodic cyclic conditions, alternating lean (NOx storage) and rich conditions during which the stored NOx are reduced by a reductant. Although PtBa/Al2O3 is a typical model catalyst for this application, systems containing K have also been prop...

The present study evaluated the regulatory role of nitric oxide (NO) in stress susceptibility and adaptation in rats. Acute restraint stress (RS x1) reduced the number of entries and time spent in the open arms in the elevated plus maze (EPM) test and raised plasma corticosterone levels. RS (x1)-induced neurobehavioral suppression and raised corticosterone levels were attenuated by pretreatment...

Nitric oxide (NO) may play important roles in rheumatoid arthritis (RA). RA is an inflammatory disease involving joints and other systems including salivary glands. To assess NO production in RA patients, we compared levels of serum, urine, and salivary nitrite and nitrate (NOx) in patients with RA and normal subjects, and we examined the relationships of these measures to disease activity. Ser...