Triggers of nonallergic rhinitis symptoms vary and can include certain odors or irritants in the air, changes in the weather, some medications, certain foods, and chronic health conditions. A diagnosis of nonallergic rhinitis is made after an allergic cause is ruled out.
DNA extraction. For the various methods, see Nucleic acid methods. DNA isolation is a process of purification of DNA from sample using a combination of physical and chemical methods. The first isolation of DNA was done in 1869 by Friedrich Miescher. Currently it is a routine procedure in molecular biology or forensic analyses.
Nucleotide incorporation is determined by base pairing with the template strand of the DNA. The template is the DNA strand, also called the sense strand, that is copied by the RNA polymerase into a complementary strand of RNA called the transcript. The DNA strand that is not copied is know as the antisense strand.