Environmental contaminants are chemicals that are present in the environment in which the food is grown, harvested, transported, stored, packaged, processed, and consumed. The physical contact of the food with its environment results in its contamination.Possible sources of contamination include:lso, food contaminant testing assures consumers safety and quality of purchased food products and can prevent foodborne diseases, and chemical, microbiological, or physical food hazards.
The most common cause of portal hypertension is cirrhosis of the liver. Cirrhosis is scarring which accompanies the healing of liver injury caused by hepatitis, alcohol, or other less common causes of liver damage. In cirrhosis, the scar tissue blocks the flow of blood through the liver.
Over time this build-up (plaque) can narrow the artery walls and can also develop a hard fibrous cap. If this fibrous cap ruptures, a blood clot can form and completely block the blood vessel, leading to a heart attack. In some cases, a vessel can also be blocked by a spasm in the artery.