| D007503 |
Iron Isotopes |
Stable iron atoms that have the same atomic number as the element iron, but differ in atomic weight. Fe-54, 57, and 58 are stable iron isotopes. |
Isotopes, Iron |
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| D007700 |
Kinetics |
The rate dynamics in chemical or physical systems. |
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| D008297 |
Male |
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Males |
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| D008722 |
Methods |
A series of steps taken in order to conduct research. |
Techniques,Methodological Studies,Methodological Study,Procedures,Studies, Methodological,Study, Methodological,Method,Procedure,Technique |
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| D008875 |
Middle Aged |
An adult aged 45 - 64 years. |
Middle Age |
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| D002859 |
Chromium Isotopes |
Stable chromium atoms that have the same atomic number as the element chromium, but differ in atomic weight. Cr-50, 53, and 54 are stable chromium isotopes. |
Isotopes, Chromium |
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| D004905 |
Erythrocyte Aging |
The senescence of RED BLOOD CELLS. Lacking the organelles that make protein synthesis possible, the mature erythrocyte is incapable of self-repair, reproduction, and carrying out certain functions performed by other cells. This limits the average life span of an erythrocyte to 120 days. |
Erythrocyte Survival,Aging, Erythrocyte,Survival, Erythrocyte |
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| D004920 |
Erythropoiesis |
The production of red blood cells (ERYTHROCYTES). In humans, erythrocytes are produced by the YOLK SAC in the first trimester; by the liver in the second trimester; by the BONE MARROW in the third trimester and after birth. In normal individuals, the erythrocyte count in the peripheral blood remains relatively constant implying a balance between the rate of erythrocyte production and rate of destruction. |
Erythropoieses |
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| D005260 |
Female |
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Females |
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| D006350 |
Heart Valve Prosthesis |
A device that substitutes for a heart valve. It may be composed of biological material (BIOPROSTHESIS) and/or synthetic material. |
Prosthesis, Heart Valve,Cardiac Valve Prosthesis,Cardiac Valve Prostheses,Heart Valve Prostheses,Prostheses, Cardiac Valve,Prostheses, Heart Valve,Prosthesis, Cardiac Valve,Valve Prostheses, Cardiac,Valve Prostheses, Heart,Valve Prosthesis, Cardiac,Valve Prosthesis, Heart |
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