Tropical coastal systems are particularly prone to periods of environmental hypoxia, which can result from organismal respiration as well as thermal stratification, and may be further exacerbated by anthropogenic disturbances. In this study, we used five genetically distinct sub-populations of Australian barramundi (Lates calcarifer) to examine the extent of intraspecific variability in hypoxia...

High-order harmonic generation has been observed experimentally from O2 molecules at the saturation ionization intensity. The harmonic cutoff extends far beyond the cutoff of Xe despite both have nearly equal ionization potentials. In contrast, the harmonic spectra for N2 and Ar, which have almost the same ionization potentials, are essentially close to each other. We show the extension of harm...

Purpose To correlate the peripheral oxygen saturation with gestational age and the level of oral feeding skills in the introduction of oral feeding in preterm infants. Methods This is a cross-sectional, quantitative study whose sample was composed of 169 clinically stable preterm infants. Peripheral oxygen saturation was assessed before and after introduction of oral feeding. The preterm infa...

Voluntary apnea activates the central and peripheral chemoreceptors, leading to a rise in sympathetic nerve activity and limb vasoconstriction (i.e., brachial blood flow velocity and forearm cutaneous vascular conductance decrease to a similar extent). Whether peripheral and/or central chemoreceptors contribute to the cutaneous vasoconstrictor response remains unknown. We performed three separa...

Background Opioid-induced respiratory compromise remains a significant challenge in etorphine-immobilised wildlife. Serotonergic agonists offer potential avenue for preventing or treating opioid-induced compromise. We therefore aimed to determine whether the selective 5-hydroxytryptamine receptor 4 (5-HT4) agonist, BIMU-8, reverses goats. Methods Seven healthy adult goats were immobilised with ...

Allergic rhinitis (AR) is a disease that presents with symptoms like nasal discharge, blockage, and itchiness, which impair the quality of life most patients depending on its severity. The common symptom in AR persistent bilateral may indirectly potentially affect airflow into lung. However, can be controlled using intranasal steroid spray (INS). This study investigated role obstruction lowerin...

Increase in lung size has been described in acromegalic patients, but data on respiratory muscle function and control of breathing are relatively scarce. Lung volumes, arterial blood gas tensions, and respiratory muscle strength and activation during chemical stimulation were investigated in a group of 10 patients with acromegaly, and compared with age- and sex-matched normal controls. Inspirat...

The O2 path from environment to mitochondria can be viewed as a cascade of resistances in series, each being overcome by a specific pressure gradient (O2 conductance equation). To assess the relative importance of the different factors that can set a limit to Vo max, three sets of resistances will be identified, RQ, Re and Rm, inversely proportional to: O2 transport (QmaxX [Hb]), RQ; capillary ...