| D011687 |
Purines |
A series of heterocyclic compounds that are variously substituted in nature and are known also as purine bases. They include ADENINE and GUANINE, constituents of nucleic acids, as well as many alkaloids such as CAFFEINE and THEOPHYLLINE. Uric acid is the metabolic end product of purine metabolism. |
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| D011743 |
Pyrimidines |
A family of 6-membered heterocyclic compounds occurring in nature in a wide variety of forms. They include several nucleic acid constituents (CYTOSINE; THYMINE; and URACIL) and form the basic structure of the barbiturates. |
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| D011865 |
Radioisotope Dilution Technique |
Method for assessing flow through a system by injection of a known quantity of radionuclide into the system and monitoring its concentration over time at a specific point in the system. (From Dorland, 28th ed) |
Radioisotope Dilution Technic,Dilution Technic, Radioisotope,Dilution Technics, Radioisotope,Dilution Technique, Radioisotope,Dilution Techniques, Radioisotope,Radioisotope Dilution Technics,Radioisotope Dilution Techniques,Technic, Radioisotope Dilution,Technics, Radioisotope Dilution,Technique, Radioisotope Dilution,Techniques, Radioisotope Dilution |
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| D002250 |
Carbon Radioisotopes |
Unstable isotopes of carbon that decay or disintegrate emitting radiation. C atoms with atomic weights 10, 11, and 14-16 are radioactive carbon isotopes. |
Radioisotopes, Carbon |
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| D002854 |
Chromatography, Paper |
An analytical technique for resolution of a chemical mixture into its component compounds. Compounds are separated on an adsorbent paper (stationary phase) by their varied degree of solubility/mobility in the eluting solvent (mobile phase). |
Paper Chromatography,Chromatographies, Paper,Paper Chromatographies |
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| D012231 |
Rhizobium |
A genus of gram-negative, aerobic, rod-shaped bacteria that activate PLANT ROOT NODULATION in leguminous plants. Members of this genus are nitrogen-fixing and common soil inhabitants. |
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| D012264 |
Ribonucleotide Reductases |
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Ribonucleotide Reductase,Reductase, Ribonucleotide,Reductases, Ribonucleotide |
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| D012265 |
Ribonucleotides |
Nucleotides in which the purine or pyrimidine base is combined with ribose. (Dorland, 28th ed) |
Ribonucleoside Phosphates,Ribonucleotide,Phosphates, Ribonucleoside |
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