Occupational Intakes of Radionuclides Part 1 - ICRP
Occupational Intakes of Radionuclides Part 1 - ICRP
Occupational Intakes of Radionuclides Part 1 - ICRP
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Normal Nose Breather<br />
See ‘Nasal Augmenter’.<br />
DRAFT REPORT FOR CONSULTATION<br />
<strong>Part</strong>icle transport<br />
Processes that clear material from the respiratory tract to the alimentary tract<br />
and to the lymph nodes, and move material from one part <strong>of</strong> the respiratory<br />
tract to another.<br />
Secretory cells<br />
Nonciliated epithelial cells that have mucous or serous secretions.<br />
Subcutaneous tissue<br />
Loose fibrous tissue situated directly below the skin. It includes blood vessels,<br />
connective tissue, muscle, fat and glands. In the context <strong>of</strong> intake through<br />
wounds, it represents tissue at the wound site in which radionuclides could be<br />
retained prior to removal <strong>of</strong> soluble or dissolved material to blood or insoluble<br />
material via lymphatic vessels.<br />
Target tissues in the bronchial region <strong>of</strong> the Human Respiratory Tract Model:<br />
(See Table 8. For each <strong>of</strong> the other regions only one target tissue is specified<br />
and hence no special symbol is required.)<br />
BBbas tissue in bronchial region through which basal cell nuclei are<br />
distributed.<br />
BBsec tissue in bronchial region through which secretory cell nuclei are<br />
distributed.<br />
Thermodynamic diameter (dth)<br />
Diameter (μm) <strong>of</strong> a spherical particle that has the same diffusion coefficient in<br />
air as the particle <strong>of</strong> interest.<br />
Thoracic (TH) Airways<br />
Combined bronchial, bronchiolar and alveolar-interstitial regions.<br />
Transfer compartment<br />
The compartment introduced for mathematical convenience into many <strong>of</strong> the<br />
biokinetic models previously used by <strong>ICRP</strong> to account for the translocation <strong>of</strong><br />
the radioactive material through the body fluids from where they are deposited<br />
in tissues.<br />
Types <strong>of</strong> materials, classified according to their rates <strong>of</strong> absorption from the<br />
respiratory tract to body fluids:<br />
Type F deposited materials that are readily absorbed into body fluids<br />
from the respiratory tract. (Fast absorption)<br />
Type M deposited materials that have intermediate rates <strong>of</strong> absorption<br />
into body fluids from the respiratory tract. (Moderate absorption)<br />
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