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 and Methemoglobinemia. Methemoglobinemia, or blue-baby syndrome, is a condition caused by the inability of the blood to deliver enough oxygen to the body. It is the most well-known effect of exposure to elevated levels of nitrate in drinking water.When nitrate is ingested it is converted to another chemical form, nitrite.iven the litany of health effects associated with nitrate exposure and the uncertainty that this volume of evidence brings to the prediction of health risks, sound scientific judgment dictates that the U.S. EPA apply a safety factor of at least two to the current 10 PPM standard for nitrate-nitrogen in drinking water.