need of environmental controls
Answers
Explanation:
Environmental control measures help eliminate triggers that initiate the allergic reaction and reduce the conditions that sustain it. The most frequent offenders are the ubiquitous dust mites, which are ideally suited to living in the home environment.
Answer:
Environmental control is an important aspect of inhalation system design. Unusual environmental conditions may place an additional, undesirable, stress on test animals. Variations in environmental factors such as temperature, relative humidity, atmospheric pressure, airflow, air quality, noise, and vibration could affect experimental animals and exposure atmospheres (Bernstein and Drew 1980; Hinners 1978; Phalen 1984). It is important that all chambers used in a study be controlled within the same environmental limits to ensure comparability between groups (Cheng et al. 1989). Computer control and monitoring of environmental conditions is recommended to provide consistent operating conditions, documentation of actual conditions in the exposure chambers, and alarms if any of the measured parameters are not within preset limits.