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.
Common side effects of this medicine include: 1  Dizziness or lightheadedness. 2  Headache. 3  Flushing, or feeling warm, in the face and neck. 4  Nausea.or a heart attack. Nitroglycerin may be used to treat a heart attack, because it can help increase blood flow through the coronary arteries to the heart. For angina. Nitrates prevent and relieve angina.