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.
Nitrate Allergy Symptoms. Nitrate is the chemical compound found in various foods. It is used as a preservative for foods. Nitrate allergy symptoms are found in some people by eating processed foods. The people who are sensitive to this chemical might suffer serious headaches to migraines due to nitrate allergy.