It is for this reason that is referred to as a complementary DNA or cDNA. Though there are numerous processes for synthesizing cDNA, the best way of doing so is by using mature or fully spliced mRNA. This is usually done by using the enzyme reverse transcriptase.
Ammonia is used as refrigerant prominently in the refrigeration systems of food industry like dairies, ice creams plants, frozen food production plants, cold storage warehouses, processors of fish, poultry and meat and number of other applications.
1 Ammonia is a toxic gas or liquid that, when concentrated, is corrosive to tissues upon contact. 2  Exposure to ammonia in sufficient quantities can be fatal. 3  One of the highest production-volume chemicals in the U.S., concentrated ammonia is used in manufacturing, refrigeration, and agriculture (as a fertilizer). Clear, colorless liquid under pressure. 2  DESCRIPTION: For the purposes of this card, ammonia refers to solutions that are 50% ammonia or greater, ammonia anhydrous, and ammonia anhydrous liquified, unless otherwise specified. 3  Ammonia is a toxic gas or liquid that, when concentrated, is corrosive to tissues upon contact.