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.
Some common examples of nitrate medications include: 1  isosorbide dinitrate (Dilatrate-SR, Isordil). 2  isosorbide mononitrate (ISMO). 3  nitroglycerin (Nitro-Dur, Nitrolingual, Nitrostat. nitroglycerin (Nitrostat): Side effects include headache, flushing, low blood pressure. 2  Placed under tongue to provide relief from or to prevent angina attack; a short-acting preparation. 3  nitroglycerin spray (Nitrolingual Pump spray, NitroMist): One to two squirts onto or under the tongue to treat or prevent angina.