Linked Life Data

3958424

Source:http://linkedlifedata.com/resource/pubmed/id/3958424

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1986-4-30
pubmed:abstractText
The effect of exercise on particle deposition in rats was investigated. Twenty male rats were trained to run on a treadmill and were exposed to gallium-67 oxide (67Ga2O3) particles (0.1 micron activity median diffusion diameter) for 30 min while running at 30 m min-1. Twenty resting controls were exposed in the same system while confined in wire mesh cages. Ten exercising and 10 resting rats were killed 2 h and 12 days after exposure. Tissue radioactivity levels of 67Ga2O3 were measured and normalized for differences in exposure concentration and body weight. Significantly (P less than 0.05) more 67Ga was deposited in the nasal passages (20 vs 5 nCi) and in the trachea and mainstem bronchi (0.05 vs 0.03 nCi) of exercising rats than in resting rats. There were no significant differences between the exercising and resting rats in amounts of 67Ga in the lung lobes at 2 h after exposure. Using assumed minute volumes, exercising rats had a significantly (P less than 0.05) lower lung deposition efficiency, expressed as percentage of estimated inhaled material, than did resting rats (3 vs 10%). The results suggest that exercising rats inhale more ultrafine particles, but deposit a smaller fraction of them in their lungs. The result is a similar lung burden of 0.1 micron particles in resting and exercising animals.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0260-437X
pubmed:author
pubmed:issnType
Print
pubmed:volume
6
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
21-4
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1986
pubmed:articleTitle
Deposition of ultrafine aggregate particles in exercising rats.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S.