"There seems to be no limit for the degree of chemical complexity that interstellar space is able to fabricate." ...

DNA stands for deoxyribonucleic acid. Nucleic acids are named for where they're found—inside the nuclei of cells—and for the ...

The remaining positions are occupied by carbon atoms, forming the backbone of important nucleobases in DNA and RNA. (Image: Public Domain) Types of Pyrimidines in Nucleic Acids There are three types ...

C. J. Knight is an exhaustive review of growth factors in microbiology; amino-acids, purines, pyrimidines and naphthoquinones are discussed as well as the vitamin B complex. The threads of ...

This image illustrates the chemical structures of the five main nucleobases found in DNA and RNA. The pyrimidines, thymine (DNA), uracil (RNA), and cytosine are shown on top while the purines, adenine ...

The numbers of molecules present of the two bases, adenine and guanine, called purines, were always equal to the total amount of thymine and cytosine, the other two bases, called pyrimidines.

In other words, the total amount of purines (A + G) and the total amount of pyrimidines (C + T) are usually nearly equal. (This second major conclusion is now known as "Chargaff's rule.") ...

Adenine and guanine are double-ring molecules called purines, but cytosine, thymine and uracil are all pyrimidines: single rings. To maintain its orderly structure, single rings on one strand can ...

Summary and Introduction Clinical Application—Disease Entities Theoretical Framework for Therapy−The 'Steel Paradigm' Conclusion References Theoretical Framework for Therapy−The 'Steel ...

During the past 20 years, the advent of neoadjuvant, primary, and adjuvant concurrent chemoradiotherapy has improved cancer care dramatically. Significant contributions have been made by ...