16 research outputs found

    A fungus infected environment does not alter the behaviour of foraging ants.

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    info:eu-repo/semantics/publishe

    Chest Physiotherapy and Hyperinflation

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    Effect of oxygen on breathing during exercise in patients with chronic obstructive lung disease

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    In 10 exercising patients with chronic obstructive lung disease (COLD) we measured ventilation (V(E)), end-tidal CO2 (P(ET)CO2), mean inspiratory flow (VT/TI), the ratio of inspiratory time to total time for one cycle (T(I)/T(TOT), and occlusion pressure at 0.1 s measured at the mouth (P 0.1), when they breathed room air and 100% oxygen. Oxygen breathing increased the maximal work load achieved. Furthermore, at the same exercise load, P 0.1, VT/TI, V(E), heart rate, respiratory frequency (f) decreased significantly in hyperoxia as compared with normoxia. Thoraco-pulmonary impedance assessed by P 0.1/V(E) and P 0.1/(VT/TI) ratios showed a slight but significant decrease in hyperoxia. This reduction might involve a reduction in peripheral mechanical drive to the respiratory centre. Thus in exercising patients affected by COLD, hyperoxia not only decreases the chemical afferent drive but also may slightly reduce the afferent mechanical drive to the respiratory centre. The decrease in the thoraco-pulmonary impedance may be explained either by an increase in efficiency of the respiratory muscles and/or a decrease in airway resistance.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

    Breathing affects venous return from legs in humans

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    SCOPUS: ar.jinfo:eu-repo/semantics/publishe

    Breathing affects venous return from legs in humans

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    SCOPUS: ar.jinfo:eu-repo/semantics/publishe
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