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.
Ch 10, Lesson A, Page 1 - Refrigeration: Types and Applications. Most people know something about refrigeration because they have a refrigerator in their kitchen. They may or may not realize that their air-conditioner is also a refrigeration system. In fact these two types of refrigerators are both vapor-compression refrigeration systems. Vapor compression refrigeration is also used industrially to chill and even condense many chemicals that cannot be easily condensed at ambient temperatures.