Secondary data for how much oxygen is in the air

Investigate whether mass is unchanged when chemical and physical changes take place. Develop and use models to describe the nature of matter; demonstrate how they provide a simple way to to account for the conservation of mass, changes of state, physical change, chemical change, mixtures, and their separation.

Related articles. Resource Monitoring local air pollution levels Research and evaluate real data showing current and historical levels of the atmospheric pollutant nitrogen dioxide in your local area. Ideas Give context to air pollution, materials and nanochemistry TZ Use these tips and activities to link UN sustainable development goal 11 on sustainable cities to your lessons.

Load more articles. No comments yet. You're not signed in. Only registered users can comment on this article. Sign in Register. More Experiments. Climate Change. Climate Feedback. Ocean Acidification. Rising Sea Level. Accessed July 23, Associate professor, Nelson Institute for Environmental Studies. Study record managers: refer to the Data Element Definitions if submitting registration or results information. Patients with lung disease experiencing difficulty breathing can be treated with oxygen therapy.

This involves the delivery of "extra" oxygen by a face-mask or through small tubes placed in the nose called nasal prongs. The high concentration of oxygen can help to provide enough oxygen for all of the organs in the body. Results of this study will help to determine if levels of oxygen therapy currently accepted as being "safe" may actually be damaging to the lungs.

Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below.

For general information, Learn About Clinical Studies. Laboratory evaluation; including complete blood count CBC , serum electrolyte determinations, clotting times, chest x-ray, pulmonary function testing, and an electrocardiogram EKG - within normal limits;. Non-smokers defined as having never smoked or not smoked in the past 2 years;. Subjects must be willing to make the time commitment necessary for the study. Any study subject who does not fulfill the criteria for eligibility.

Individuals with a history of allergy or adverse reactions to atropine or any local anesthetic;. Individuals testing positive for the human immunodeficiency virus or hepatitis virus;. Individuals on chronic medications or currently receiving medications;. NO 2 forms from emissions from cars, trucks and buses, power plants, and off-road equipment.

Breathing air with a high concentration of NO 2 can irritate airways in the human respiratory system. Such exposures over short periods can aggravate respiratory diseases, particularly asthma, leading to respiratory symptoms such as coughing, wheezing or difficulty breathing , hospital admissions and visits to emergency rooms. Longer exposures to elevated concentrations of NO 2 may contribute to the development of asthma and potentially increase susceptibility to respiratory infections.

People with asthma, as well as children and the elderly are generally at greater risk for the health effects of NO 2.

NO 2 along with other NO x reacts with other chemicals in the air to form both particulate matter and ozone.