| nutrient artery of the tibia | Artery derived from the upper part of the posterior tibial artery; it enters through the nutrient foramen on the posterior surface of the tibia. Synonym: arteria nutriens tibialis. (05 Mar 2000) |
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| nutrient canal | A canal in the shaft of a long bone or in other locations in irregular bones through which the nutrient artery enters a bone. Synonym: canalis nutricius. (05 Mar 2000) |
| nutrient enema | A rectal injection of predigested food. (05 Mar 2000) |
| nutrient foramen | The external opening of the nutrient canal in a bone. Synonym: foramen nutricium. (05 Mar 2000) |
| nutrient medium | A substance, either solid or liquid, used for the cultivation, isolation, identification, or storage of microorganisms. Synonym: growth medium, medium, nutrient medium. (05 Mar 2000) |
| nutrient vessel | <anatomy, artery> An artery of variable origin that supplies the medullary cavity of a long bone. Synonym: arteria nutricia, nutrient vessel. (05 Mar 2000) |
| DNA insertion elements | Discrete transposable segments of DNA which can insert into chromosomal, phage, and plasmid DNA. Some insert at random while others are site-specific; most have not been found to exist except in the inserted state. Their insertion into a genome always produces a mutation ("insertion mutation"), and their excision frequently results in a loss of host genetic information. Types of transposable elements include is elements (insertion sequence elements), which are composed of between 700 and 1400 bases and contain no genes unrelated to insertion function and tn elements (transposon elements), which are generally larger than 1400 bases and contain genes unrelated to insertion function. The concept also includes the delta element of saccharomyces cerevisiae and the integration site. (12 Dec 1998) |
| elements | Simple substances which cannot be decomposed by chemical means. They are made up of atoms which are alike in their peripheral electronic configurations, their chemical properties, and in the number of protons in their nuclei. They may differ in the number of neutrons in their nuclei. (12 Dec 1998) |
| elements, radioactive | Chemical elements which spontaneously transmute into another element with corpuscular or electromagnetic radiation. The natural radioactive elements are all those with an atomic number above 83, and some other elements, such as potassium (atomic number 19) and rubidium (atomic number 7), which are very weakly radioactive. (12 Dec 1998) |
| trace elements | A group of chemical elements that are needed in minute quantities for the proper growth, development, and physiology of an organism. (12 Dec 1998) |
| trace nutrient | Essential dietary elements required only in small quantities. They are present in the body in amounts less than .005% of body weight. (12 Dec 1998) |
| excito-nutrient | <physiology> Exciting nutrition; said of the reflex influence by which the nutritional processes are either excited or modified. Source: Websters Dictionary (01 Mar 1998) |
| labile elements | Tissue cells, as of epithelium, connective tissue, etc., that continue to multiply by mitosis during the life of the individual. (05 Mar 2000) |
| fold-back elements | A type of transposable element that possesses long inverted repeats, such that when denatured, loops are formed. (05 Mar 2000) |
| long interspersed elements | Long repetitive sequences in DNA with terminal repeats seen in human and mouse DNA. (05 Mar 2000) |