Herein, we report on a facile, low-cost, and efficient method to tune the structure and properties of chemically reduced graphene oxide (rGO) by applying a transient voltage across the rGO for ultrasensitive gas sensors. A large number of defects, including pits, are formed in the rGO upon the voltage activation. More interestingly, the number of epoxide and ether functional groups in the rGO i...

The combination of environmental chamber exposure and bronchoalveolar lavage (BAL) was used to study the time-course of the cell response in the human lung to nitrogen dioxide (NO2). Healthy subjects were exposed for 20 min to 7 mg NO2.m-3 (4 ppm), a concentration which occurs indoors in industries and is below the peak exposure limit for work places in most countries, 10 mg.m-3 (5.5 ppm). BAL ...

OBJECTIVES We sought to assess whether oxidation products of nitric oxide (NO), nitrite (NO2-) and nitrate (NO3-), referred to as NOx, are released by the heart of patients after acute myocardial infarction (AMI) and whether NOx can be determined in peripheral blood of these patients. BACKGROUND Previously we reported that in experimental myocardial infarction (rabbits) NOx is released mainly...

The vasorelaxant response of N-p-nitrophenylmaleimide (4-NO2-NPM) was evaluated. The mesenteric rings (1-2 mm i.d.) were suspended by cotton thread for isometric tension recordings in a Tyrode's solution at 37 degrees C and gassed with a mixture of 95% O2 and 5% CO2, under a resting tension of 0.75 g. 4-NO2-NPM induced relaxation in mesenteric rings pre-contracted with phenylephrine (Phe; 10 mi...

BACKGROUND It has been proposed that the pH of airway lining fluid may regulate the fractional exhaled concentration of nitric oxide (Fe(NO)) in respiratory disease. METHODS Fe(NO), exhaled breath condensate (EBC) pH, and EBC concentrations of nitrite plus nitrate (NO2/NO3) were compared in 12 subjects with stable asthma, 18 with stable cystic fibrosis (CF), and 15 healthy control subjects. E...

This paper throws light on household cooking related exposures and level of indoor air pollutants (particulate matter and gaseous pollutants CO, CO2, SO2, NO, NO2) in different exposure area from the different types of cooking fuels used. Still the prevalence of biomass fuels exists in Indian households, combustion of which releases higher levels of solid and gaseous pollutants during the cooki...

Background: It has been proposed that the pH of airway lining fluid may regulate the fractional exhaled concentration of nitric oxide (FENO) in respiratory disease. Methods: FENO, exhaled breath condensate (EBC) pH, and EBC concentrations of nitrite plus nitrate (NO2/ NO3) were compared in 12 subjects with stable asthma, 18 with stable cystic fibrosis (CF), and 15 healthy control subjects. Eigh...

In this study, we estimated the transportation-related emissions of nitrogen oxides (NOx) at an individual level for a sample of the Montreal population. Using linear regression, we quantified the associations between NOx emissions and selected individual attributes. We then investigated the relationship between individual emissions of NOx and exposure to nitrogen dioxide (NO2) concentrations d...