Air filtration is frequently recommended as a component of environmental control measures for patients with allergic respiratory disease. Residential air filtration can be provided by whole house filtration via the home's heating, ventilation, or air conditioning system, by portable room air cleaners, or a combination of the two. Appliances to filter the sleep breathing zone also have been deve...

We present an extensive first-principles study of the phonons in boron nitride nanotubes using density functional perturbation theory in the local density approximation. Based on the nonsymmorphic rod-group symmetry of the tubes, the Ramanand infrared-active modes at the G point of the one-dimensional Brillouin zone are evaluated. For zigzag and chiral nanotubes, the set of infrared-active mode...

Objective: To perform an evaluation of the risk to healthcare personnel exposure cisplatin during a Hyperthermic Intraperitoneal Chemotherapy (HIPEC) procedure in operating room environment.Methods: Breathing zone air samples were taken from (OR) before, and after HIPEC filter membrane adsorption liquid impact method was applied collect samples. The surface wipe floor OR procedure. Inductively ...

aim and background: enuresis is known as one of the most common disorders in childhood. snoring at night and obstructive sleep apnea have been considered as probable causes, at least in some cases. thus, the importance of a breathing exercise to reduce bedwetting in children with nocturnal snoring should be noted. method and materials: this study is an experimental survey with control group. th...

The distribution of PM2.5 around a thermal manikin with realistic female body shape in naturally ventilated room has been modelled. health risk (HR) due to inhalation the quantified by integrating pollutants mass flux over boundaries virtual box mannequin’s head (the breathing zone). By same approach HR is evaluated another that surrounds manikins and defines occupied zone. paper focuses on pec...