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common cold/hypoxie
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Alterations in resting cerebrovascular regulation do not affect reactivity to hypoxia, hyperoxia, or neurovascular coupling following a SCUBA dive
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New findings: What is the central question of this study? To characterize cerebral blood flow (CBF) regulation following a single SCUBA dive to a depth of 18 m sea water with a 47-minute bottom time. What is the main finding and its
Balancing hypoxia and hypothermia in cold-submerged frogs.
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Many animals respond to hypoxic stress by selecting cooler environments, the so-called 'behavioural hypothermia' response. Amphibians overwintering in ice-covered ponds and lakes offer an ecologically relevant test of this response since they must choose between the confounding metabolic effects of
Evolution of human hypoxia tolerance physiology.
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Analysis of human responses to hypobaric hypoxia in different lineages (lowlanders, Andean natives, Himalayan natives, and East Africans) indicates 'conservative' and 'adaptable' physiological characters involved in human responses to hypoxia. Conservative characters, arising by common descent,
Our ancestral physiological phenotype: an adaptation for hypoxia tolerance and for endurance performance?
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There are well known mechanistic similarities in human physiology between adaptations for endurance performance and hypoxia tolerance. By using background principles arising from recent studies of the evolution of the diving response in marine mammals, here we analyze human responses to hypobaric
Seasonal- and temperature-dependent variation in CNS ascorbate and glutathione levels in anoxia-tolerant turtles.
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We determined the ascorbic acid (ascorbate) and glutathione (GSH) contents of eight regions of the CNS from anoxia-tolerant turtles collected in summer and in winter. Ascorbate was of special interest because it is found in exceptionally high levels in the turtle CNS. The temperature-dependence of
The Snow Must Go On: Ground Ice Encasement, Snow Compaction and Absence of Snow Differently Cause Soil Hypoxia, CO2 Accumulation and Tree Seedling Damage in Boreal Forest.
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At high latitudes, the climate has warmed at twice the rate of the global average with most changes observed in autumn, winter and spring. Increasing winter temperatures and wide temperature fluctuations are leading to more frequent rain-on-snow events and freeze-thaw cycles causing snow compaction
Cardioprotection of Atractylodes lancea against Hypoxia/ Reoxygenation-Injured H9c2 Cardiomyoblasts.
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Atractylodes lancea (Thunb) DC has been widely used as traditional medicine in many countries including Thailand for the treatment of fever, common cold and sore throat.
To evaluate the cardioprotective effects of Atractylodes lancea extracts against hypoxia/reoxygenation (HR)-injured H9c2
Hypoxia but not shy-bold phenotype mediates thermal preferences in a threatened freshwater fish, Notropis percobromus.
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For ectothermic animals, ambient temperature strongly influences developmental growth rate and individual fitness. While many ectotherms live in environments that are spatially hetero-thermal, the coupling between behavioural phenotypes (e.g., shy or bold behaviour) and thermal preferences remains
Pushing the limit: examining factors that affect anoxia tolerance in a single genotype of adult D. melanogaster.
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Drosophila melanogaster is a promiscuous species that inhabits a large range of harsh environments including flooded habitats and varying temperature changes. To survive these environments, fruit flies have adapted mechanisms of tolerance that allow them to thrive. During exposure to anoxic stress,
Mechanism and evolution of hypoxia-tolerance in humans.
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To physiologists, the term 'adaptation' usually refers to any trait that is considered advantageous; evolutionary biologists require a more rigorous definition (restricting it to traits arising and maintained under selection). By their definition, many physiological traits may merely reflect
Adaptation and conservation of physiological systems in the evolution of human hypoxia tolerance.
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Analysis of human responses to hypobaric hypoxia in different lineages (lowlanders, Andean natives, Himalayan natives, and East Africans) indicates 'conservative' and 'adaptable' physiological characters involved in human responses to hypoxia. Conservative characters, derived by common descent,
Vadadustat, an oral hypoxia-inducible factor prolyl hydroxylase inhibitor, for treatment of anemia of chronic kidney disease: two randomized Phase 2 trials in Japanese patients
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Background: Vadadustat is an investigational, oral hypoxia-inducible factor prolyl hydroxylase inhibitor in development in Japan for the treatment of chronic kidney disease (CKD)-induced anemia.
Methods:
Divergent behavioural responses to acute hypoxia between individuals and groups of naked mole rats.
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Most small rodents reduce energy demand in hypoxia via behavioural strategies. For example, animals may reduce their activity, and/or move to colder environments or alter huddling strategies to take advantage of anapyretical energy savings. Naked mole rats (NMRs) are among the most hypoxia tolerant
[The expression and significance of hypoxia inducible factor-1alpha and microvessel density in human nasopharyngeal carcinoma].
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OBJECTIVE
To examine the expression of HIF-1alpha and CD34 in nasopharyngeal carcinoma and nasopharyngitis tissues, evaluate the role of HIF-1alpha and microvessel density (MVD) in nasopharyngeal carcinoma, probe the relationship between HIF-1alpha and MVD.
METHODS
The expression of HIF-1alpha was
[Respiratory syncytial virus brainstem encephalitis in a 7-year-old boy].
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The literature reports that neurological complications of childhood respiratory diseases due to respiratory syncytial virus (RSV) fluctuate between 1 and 40% of cases. They mostly involve central apnea - often the first symptom of infection - anoxia, and ischemic brain damage due to severe sudden
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