Results 51 to 60 of about 637,561 (309)

Remote ischemic preconditioning improves cognitive control in healthy adults: Evidence from an event-related potential study

open access: yesFrontiers in Neuroscience, 2022
It is suggested that remote ischemic preconditioning (RIPC) may be a promising treatment for improving healthy adults’ cognitive control. However, direct empirical evidence was absent. Therefore, this study aims to provide evidence for the impact of RIPC
Yaling Li   +24 more
doaj   +1 more source

Acute High-Altitude Illnesses [PDF]

open access: yesNew England Journal of Medicine, 2013
A 45-year-old healthy man wishes to climb Mount Kilimanjaro (5895 m) in a 5-day period, starting at 1800 m. The results of a recent exercise stress test were normal; he runs 10 km 4 or 5 times per week and finished a marathon in less than 4 hours last year.
Jean-Paul, Richalet   +3 more
openaire   +7 more sources

Microbial Contribution to Soiling and Its Impact on Photovoltaic Module Soiling in Arid Zones of the Atacama Desert

open access: yesAdvanced Sustainable Systems, EarlyView.
Microorganisms colonizing photovoltaic surfaces in the Atacama desert form biofilms that enhance particle adhesion and reduce energy yield. This study identifies UV‐resistant bacteria and carotenoid‐producing strains that interfere with PV performance.
Douglas Olivares   +8 more
wiley   +1 more source

Hypoxia Exacerbates Inflammatory Acute Lung Injury via the Toll-Like Receptor 4 Signaling Pathway

open access: yesFrontiers in Immunology, 2018
Acute lung injury (ALI) is characterized by non-cardiogenic diffuse alveolar damage and often leads to a lethal consequence, particularly when hypoxia coexists.
Gang Wu   +11 more
doaj   +1 more source

Effect of High-Flow Oxygen on Exercise Performance in COPD Patients. Randomized Trial

open access: yesFrontiers in Medicine, 2021
Background: High-flow oxygen therapy (HFOT) provides oxygen-enriched, humidified, and heated air at high flow rates via nasal cannula. It could be an alternative to low-flow oxygen therapy (LFOT) which is commonly used by patients with chronic ...
Konstantinos Bitos   +41 more
doaj   +1 more source

Radiation diffraction calculation program /DIFF2/ [PDF]

open access: yes, 1971
Computer program computes maximum possible strength of interference pattern sent from high altitude tracking and data relay satellite to low altitude user ...

core   +1 more source

Ecosystem‐Centered Robot Design: Toward Ecoresorbable Sustainability Robots (ESRs)

open access: yesAdvanced Science, EarlyView.
Robots exploring natural ecosystems can support monitoring and conservation, but must adopt ecosystem‐centered design to avoid pollution, waste, and damage. This review proposes guidelines for co‐designing ecoresorbable sustainability robots (ESRs), uniting materials, robotics, and ecological contexts in a single framework.
Tülin Yılmaz Nayır   +4 more
wiley   +1 more source

Behavioural and physiological adaptations to low-temperature environments in the common frog, Rana temporaria [PDF]

open access: yes, 2014
<b>Background</b><p></p> Extreme environments can impose strong ecological and evolutionary pressures at a local level. Ectotherms are particularly sensitive to low-temperature environments, which can result in a reduced activity
Biek, Roman   +2 more
core   +4 more sources

Divergent Responses of Bacterial Communities to Permafrost Degradation and Their Associations With Carbon Across Vertical Profiles

open access: yesAdvanced Science, EarlyView.
Bacterial α‐diversity decreases, but stochasticity and community stability increase across the 15 m‐depth vertical profiles and along the degraded gradient within the active layer. The abundance and interaction of core taxa mainly control community stability in the active and permafrost layers, respectively.
Shengyun Chen   +13 more
wiley   +1 more source

Effect of inhaled nitric oxide on oxygen-carrying capacity of red blood cells and hypoxia tolerance in mice

open access: yesDi-san junyi daxue xuebao, 2019
Objective To study the effects of nitric oxide (NO) inhalation on oxygen-carrying capacity of red blood cells and hypoxia tolerance in mice. Methods Peripheral blood from 8-week-old male mice was exposed to nitrogen gas containing NO in an oxygenation ...
SU Wenting   +3 more
doaj   +1 more source

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