Tritium RBE/Tritiated Water/CFUs/CFUc The acute effects on hematopoietic tissue in mice of a single administration of tritiated water were compared with the effects of exposure to 6OCo gamma radiation. The activity of tritium in the bone marrow was measured directly using a sample oxidizer and the absorbed dose was calculated from the amount of activity of tritium in it. The number of nucleated...

Leukocyte cultures of human peripheral blood were chronically exposed for 48 h to tritiated water and [3H]thymidine using a wide range of tritium doses, and aberrations in lymphocyte chromosomes at the first metaphases were examined. In the experimental conditions, the types of aberrations induced by radiation emitted from both tritiated water and [3H]thymidine were mostly chromatid types, such...

The paper considers the application of nuclear magnetic resonance for measurement fluid-flow. is an experimental nature. Flowmeter based on extremely precise. combined uncertainty can be 0.1 %. Such a value indicates that it matter deterministic and not stochastic quantity. This high degree reliability method theoretically mathematically described. presents scheme flow measurement. Water was pe...

Pauling and Miller have independently proposed that the presence of an anesthetic gas in tissue induces a cage-like arrangement of hydrogen-bonded water molecules. The theories recognize that most gas-hydrate crystals would not form at the temperature and pressure that exist during anesthesia and propose that other components of tissue such as protein should have a stabilizing effect. Measureme...

We describe a simple liquid-scintillation solution for use with water-soluble tritiated compounds that is superior to other such systems. Its advantages include: (1) a refrigerated-type liquid scintillation spectrometer is not needed because the solution has extremely good thermal stability from 22#{176} to 75#{176}C; (2) counting efficiencies are high from pH 1-12, therefore eliminating neutra...

Rates of sterol synthesis in various tissues commonly are assessed by assaying levels of 3-hydroxy-3-methylglutaryl CoA (HMG-CoA) reductase on isolated microsomes or by measuring the rates of incorporation of various 14C-labeled substrates or [3H]water into cholesterol by whole cell preparations in vitro or by the tissues of the whole animal in vivo. While measurement of activities of HMG-CoA r...