English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Visualization of buckling form of collapsible tube in imitation of airway. Kenkichi OHBA, Youji NIIMI, Masataka IWASAKI Bronchial asthma is a kind of chronic bronchitis. It causes a narrowing of the airway happen and so makes breathing difficult. It may lead to death. It is important to clarify its mechanism. The interesting characteristic of asthma airway is that its buckling consists of approximately 8 to 5 folds into the airway lumen. It is considered to be caused by rapid constriction of smooth muscle. We paid attention to a rapid change in the transmural pressure as a model of the constriction of smooth muscle. We used collapsible tubes as a model of the airway. We made apparatus which gave a sudden increase in the pressure outside the tube by using a shock tube, and visualized the shape of the cross-section of the tube by a laser sheet method. As a result, it was shown that the number of the buckling model increased with the increase in the rate of the transmural pressure rise, and that it decreased with the increase in the wall thickness.