Definition of Physical Barriers. Physical barrier is the environmental and natural condition that act as a barrier in communication in sending message from sender to receiver. Organizational environment or interior workspace design problems, technological problems and noise are the parts of physical barriers.
Nitrate: Health Effects in Drinking Water. Nitrate is one of the most common groundwater contaminants in rural areas. It is regulated in drinking water primarily because excess levels can cause methemoglobinemia, or blue baby disease.
SYMPTOMS: Symptoms of exposure to this compound include skin irritation. It can cause eye irritation. It can also cause skin sensitization (allergic reactions), lacrimation, depression, reproductive effects, liver effects, kidney effects and thyroid effects. Dermatitis may also occur. ACUTE/CHRONIC HAZARDS: This compound may cause irritation of the skin and eyes. When heated to decomposition it emits toxic fumes of carbon monoxide, carbon dioxide and nitrogen oxides. It may cause lacrimation.