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.
The known toxic effects of nitrate exposure result from the conversion of nitrate to nitrite [Hord 2011; ATSDR 2004]. The effects of nitrite (NO2-) are the same whether nitrite containing compounds are ingested or inhaled, or nitrite is produced in vivo from nitrate.