Abstract. Ammonia (NH3) in the atmosphere affects both environment and human health. It is therefore increasingly recognised by policy makers as an important air pollutant that needs to be mitigated, though it still remains unregulated many countries. In order understand effectiveness of abatement strategies, routine NH3 monitoring required. Current reference protocols, first developed 1990s, u...

Restriction of virus-specific cytotoxic T cell function by products of the major histocompatability complex (MHC), 1 a phenomenon first described in murine systems (1-3), has now been confirmed for the human T cell responses to antigens on cells infected by influenza (4, 5), Epstein-Barr (EB) (6, 7), and more recently, mumps (8), measles (9), and cytomegalo(10) 2 viruses. In each case the patte...

Objective: To examine the relationship between child maltreatment, clinically relevant adjustment problems, and dating violence in a community sample of adolescents. Method: Adolescents from 10 high schools (N = 1,419; response rate = 62%) in southwestern Ontario completed questionnaires that assessed past maltreatment, current adjustment, and dating violence. Logistic regression was used to co...

Fescue foot, summer syndrome, reproductive problems, and ryegrass staggers are all diseases of livestock related to endophyte toxins in pasture grasses. Range finding experiments and case studies of fescue foot relative to ergovaline toxin found in endophyte infected tall fescue and lolitrem B present in endophyte infected perennial ryegrass were conducted. Within 42 d of initiating a feeding t...

The purpose of this study was to observe the effects of low doses of aflatoxin B1 (AFB1) on responses to common vaccines and levels of serum cations in broilers. Male broilers at 7 d of age were fed control (no AFB1), a 75 µg of AFB1/kg (75 ppb of AFB1) diet, or a 750 µg of AFB1/kg (750 ppb of AFB1) diet. The 750 ppb of AFB1 diet resulted in a temporary increase in ELISA titers against Newcastl...

BACKGROUND Measurement of nitric oxide (NO) in exhaled air shows promise as a non-invasive method of detecting lung inflammation. However, variable concentrations of NO are measured in environmental air. The aim of this study was to verify a possible relationship between exhaled NO and atmospheric NO values during high atmospheric NO days. METHOD Exhaled air from 78 healthy non-smokers of mea...

Nitric oxide (NO) is known to be an important inflammatory mediator with a potential role in gastrointestinal diseases. We prospectively studied the luminal NO levels in 51 patients with infectious gastroenteritis, 35 patients with nonenteric bacterial infections, and 11 healthy control subjects. The levels of proinflammatory cytokines were simultaneously measured in the stools of patients with...

Rapid separation and determination of mixtures of L-ascorbic acid, nitrite, sulfite, oxalate, iodide and thiosulfate by conventional ion chromatography is often difficult due to incomplete separation of L-ascorbic acid and nitrite from the water peak when using eluents giving short elution times for iodide and thiosulfate. Separation of the six species within about 15 min has been achieved by i...

The body of published work on the role of exhaled nitric oxide (FENO) in the study of bronchial inflammation allows it to be classed as a simple, non-invasive measurement that is very useful in evaluating asthmatic patients. During a prospective study into the effects of air pollution on the health of the population of Viseu (Saud'AR Project), children with a clinical history of wheezing were i...

Nitrosatability of dried Nigerian vegetables and spices was investigated under simulated gastric conditions. N-Nitroso-dimethylamine (NDMA) was the only volatile nitrosamine found above the preformed level except in ugwu where N-nitroso-piperidine (2.3 ppb) was also detected. The lowest NDMA value of 0.4 ppb was found in bitterleaf while onions had the highest level (14.7 ppb) of nitrosation. T...