The discussion started with 4 brief presentations which provided a theoretical background for the ensuing discussion. The presentations are posted and thus not much detail on the presentations is included here. (1) Anna Rutgersson presented the basic air-side theory of gas exchange. She discussed how young waves are found under high wind speeds. In laboratory studies, the drag coefficient level...

[1] We used a controlled-environment leaf gas-exchange system and the micrometeorological technique eddy covariance to determine whether circadian rhythms constrain the rates of leaf and canopy gas exchange in an Amazonian forest over a day. When exposed to continuous and constant light for 20 to 48 hours leaves of eleven of seventeen species reduced their photosynthetic rates and closed their ...

Gas exchange dynamics in insects is of fundamental importance to understanding evolved variation in breathing patterns, such as discontinuous gas exchange cycles (DGCs). Most insects do not rely solely on diffusion for the exchange of respiratory gases but may also make use of respiratory movements (active ventilation) to supplement gas exchange at rest. However, their temporal dynamics have no...

This study was undertaken to improve our understanding of the mechanical properties of the respiratory system for a range of diving mammals to improve our ability to predict gas exchange during diving. Our long term aim is to determine the alveolar collapse depth and the pressure where gas exchange cease in marine mammals. We hypothesized that differences in the anatomy of the respiratory syste...

A mathematical model for thermal explosion in a combustible dusty gas containing fuel droplets with general Arrhenius reaction-rate laws, convective and radiative heat losses, and interphase heat exchange between gas and inert solid particles is investigated. The objective of the study is to examine the effects of interphase heat exchange between the gas and solid particles on i ignition of rea...

PURPOSE The primary aim of this study was to evaluate the efficiency of air-gas exchange techniques and the factors that influence the final concentration of an intraocular gas tamponade. Parameters were varied to find the optimum method of performing an air-gas exchange in ideal circumstances. METHODS A computer model of the eye was designed using 3D software with fluid flow analysis capabil...

The purpose of this study was to investigate whether a tethered-swimming incremental test comprising small increases in resistive force applied every 60 seconds could delineate the isocapnic region during rapidly-incremented exercise. Sixteen competitive swimmers (male, n = 11; female, n = 5) performed: (a) a test to determine highest force during 30 seconds of all-out tethered swimming (Favg) ...

• In studies of gas exchange between the lung and the pulmonary circulation it is generally assumed that the principal exchange takes place at the level of the pulmonary capillaries. The work presented here shows that some gaseous exchange can occur as well between the lung and vessels of macroscopic size. Hydrogen gas when administered to a subject by inhalation can be detected in the pulmonar...