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.
Nitrates widen blood vessels so blood can pass more easily. Doctors prescribe them to treat chest pain (angina) and reduce heart failure symptoms. Examples of nitrates include nesiritide (Natrecor) and hydralyzine (Apresoline). Nitrates can come as an intravenous (IV) infusion, a cream formulation, a fast acting tablet that goes under the tongue, or a traditional pill form.