نتایج جستجو برای: normoxia

تعداد نتایج: 2771  

Journal: :American Journal of Physiology-Heart and Circulatory Physiology 2002

Journal: :Journal of applied physiology 2000
R S Orr A S Jordan P Catcheside N A Saunders R D McEvoy

The sensation of increased respiratory resistance or effort is likely to be important for the initiation of alerting or arousal responses, particularly in sleep. Hypoxia, through its central nervous system-depressant effects, may decrease the perceived magnitude of respiratory loads. To examine this, we measured the effect of isocapnic hypoxia on the ability of 10 normal, awake males (mean age ...

Journal: :Anesthesiology 2004
David A Benaron Ilian H Parachikov Shai Friedland Roy Soetikno John Brock-Utne Peter J A van der Starre Camran Nezhat Martha K Terris Peter G Maxim Jeffrey J L Carson Mahmood K Razavi Hayes B Gladstone Edgar F Fincher Christopher P Hsu F Landon Clark Wai-Fung Cheong Joshua L Duckworth David K Stevenson

BACKGROUND The authors evaluated the ability of visible light spectroscopy (VLS) oximetry to detect hypoxemia and ischemia in human and animal subjects. Unlike near-infrared spectroscopy or pulse oximetry (SpO2), VLS tissue oximetry uses shallow-penetrating visible light to measure microvascular hemoglobin oxygen saturation (StO2) in small, thin tissue volumes. METHODS In pigs, StO2 was measu...

2017
Natalia Vila Aya Siblini Evangelina Esposito Vasco Bravo-Filho Pablo Zoroquiain Sultan Aldrees Patrick Logan Lluis Arias Miguel N Burnier

BACKGROUND Light exposure and more specifically the spectrum of blue light contribute to the oxidative stress in Age-related macular degeneration (AMD). The purpose of the study was to establish whether blue light filtering could modify proangiogenic signaling produced by retinal pigmented epithelial (RPE) cells under different conditions simulating risk factors for AMD. METHODS Three experim...

Journal: :PLoS ONE 2008
Paul Robach Jose A. L. Calbet Jonas J. Thomsen Robert Boushel Pascal Mollard Peter Rasmussen Carsten Lundby

Treatment with recombinant human erythropoietin (rhEpo) induces a rise in blood oxygen-carrying capacity (CaO(2)) that unequivocally enhances maximal oxygen uptake (VO(2)max) during exercise in normoxia, but not when exercise is carried out in severe acute hypoxia. This implies that there should be a threshold altitude at which VO(2)max is less dependent on CaO(2). To ascertain which are the me...

Journal: :The Journal of experimental biology 2015
David J McKenzie Thiago C Belaõ Shaun S Killen F Tadeu Rantin

The African sharptooth catfish Clarias gariepinus has bimodal respiration, it has a suprabranchial air-breathing organ alongside substantial gills. We used automated bimodal respirometry to reveal that undisturbed juvenile catfish (N=29) breathed air continuously in normoxia, with a marked diurnal cycle. Air breathing and routine metabolic rate (RMR) increased in darkness when, in the wild, thi...

Journal: :The Journal of physiology 2014
Matthew E Pamenter J Austin Carr Ariel Go Zhenxing Fu Stephen G Reid Frank L Powell

When exposed to a hypoxic environment the body's first response is a reflex increase in ventilation, termed the hypoxic ventilatory response (HVR). With chronic sustained hypoxia (CSH), such as during acclimatization to high altitude, an additional time-dependent increase in ventilation occurs, which increases the HVR. This secondary increase persists after exposure to CSH and involves plastici...

2011
Adrian Dragu Stefan Schnürer Cordula Surmann-Schmitt Klaus von der Mark Michael Stürzl Frank Unglaub Maya B Wolf Mareike Leffler Justus P Beier Ulrich Kneser Raymund E Horch

The aim of this study was to analyse various gene expression profiles of muscle tissue during normoxia, ischaemia and after reperfusion in human muscle free flaps, to gain an understanding of the occurring regulatory, inflammatory and apoptotic processes on a cellular and molecular basis. Eleven Caucasian patients with soft tissue defects needing coverage with microsurgical free muscle flaps we...

Journal: :The Journal of experimental biology 2012
David J McKenzie John F Steffensen Edwin W Taylor Augusto S Abe

The contribution of air breathing to aerobic metabolic scope and exercise performance was investigated in a teleost with bimodal respiration, the banded knifefish, submitted to a critical swimming speed (U(crit)) protocol at 30°C. Seven individuals (mean ± s.e.m. mass 89±7 g, total length 230±4 mm) achieved a U(crit) of 2.1±1 body lengths (BL) s(-1) and an active metabolic rate (AMR) of 350±21 ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید