Results 51 to 60 of about 2,849,596 (321)

Circulating Apoptotic Signals During Acute and Chronic Exposure to High Altitude in Kyrgyz Population

open access: yesFrontiers in Physiology, 2019
Background: Circulating apoptotic signals (CASs) have been described in the pathologies associated with dysregulated apoptosis, such as cancer, heart diseases, and pulmonary hypertension (PH).
Djuro Kosanovic   +18 more
doaj   +1 more source

Altitude Limits for Rotating Vector Model Fitting of Pulsar Polarization [PDF]

open access: yes, 2012
Traditional pulsar polarization sweep analysis starts from the point dipole rotating vector model (RVM) approximation. If augmented by a measurement of the sweep phase shift, one obtains an estimate of the emission altitude (Blaskiewicz, Cordes, & Wasserman).
arxiv   +1 more source

On the Anthropogenic and Natural Injection of Matter into Earth's Atmosphere [PDF]

open access: yes, 2020
Every year, more and more objects are sent to space. While staying in orbit at high altitudes, objects at low altitudes reenter the atmosphere, mostly disintegrating and adding material to the upper atmosphere. The increasing number of countries with space programs, advancing commercialization, and ambitious satellite constellation projects raise ...
arxiv   +1 more source

Hypoxic training increases maximal oxygen consumption in Thoroughbred horses well-trained in normoxia. [PDF]

open access: yes, 2017
Hypoxic training is effective for improving athletic performance in humans. It increases maximal oxygen consumption (V̇O2max) more than normoxic training in untrained horses. However, the effects of hypoxic training on well-trained horses are unclear. We
Jones, James H   +4 more
core   +1 more source

Spatiotemporal analysis of historical records (2001-2012) on dengue fever in Vietnam and development of a statistical model for forecasting risk.

open access: yesPLoS ONE, 2019
BACKGROUND:Dengue fever is the most widespread infectious disease of humans transmitted by Aedes mosquitoes. It is the leading cause of hospitalization and death in children in the Southeast Asia and western Pacific regions.
Bernard Bett   +10 more
doaj   +1 more source

Highly Scalable, Raspberry‐Like Microbeads with Nano‐/Micro‐Confined Hybrid Hydrogel Desiccants for Rapid Atmospheric Water Harvesting

open access: yesAdvanced Functional Materials, EarlyView.
A scalable nano‐/micro‐confinement strategy is developed, where polyacrylamide (PAM)‐LiCl hybrid desiccants are confined within hollow nanoparticles (HNPs) and assembled into raspberry‐like microbeads. The beads have a hydrogel‐rich core and an NP‐rich shell for fast absorption and desorption, releasing water 13.6 L kg⁻¹ day⁻¹.
Yunchan Lee   +6 more
wiley   +1 more source

Transcriptomic analysis of iPSC-derived endothelium reveals adaptations to high altitude hypoxia in energy metabolism and inflammation.

open access: yesPLoS Genetics
Tibetan adaptation to high-altitude hypoxia remains a classic example of Darwinian selection in humans. Amongst Tibetan populations, alleles in the EPAS1 gene - whose protein product, HIF-2α, is a central regulator of the hypoxia response - have ...
Olivia A Gray   +7 more
doaj   +1 more source

Effects of Psychological, Environmental and Physical Stressors on the Gut Microbiota

open access: yesFrontiers in Microbiology, 2018
Stress, a ubiquitous part of daily human life, has varied biological effects which are increasingly recognized as including modulation of commensal microorganisms residing in the gastrointestinal tract, the gut microbiota.
J. Philip Karl   +6 more
doaj   +1 more source

Accuracy of Mean Radiant Temperature Derived from Active and Passive Radiometry

open access: yesAtmosphere, 2020
The concept of the mean radiant temperature (Tmrt) allows the study of radiative exchanges between a human and its environment. It presupposes that the radiant effects on the person of the actual environment, which is generally heterogeneous, and the ...
Henning Staiger, Andreas Matzarakis
doaj   +1 more source

A Low‐Cost Curvature Detection Method for an Untethered Biped Pipeline Climbing Robot with Energy‐Efficient Strategy

open access: yesAdvanced Robotics Research, EarlyView.
A low‐cost pipeline curvature detection method has been proposed for an untethered biped pipeline surface climbing robot (BPCR) system with a five‐degree‐of freedom structure. The BPCR features adaptive vacuum suction cups equipped with multiple laser sensors on the suction modules to detect the curvature of various surfaces.
Zikang Li   +3 more
wiley   +1 more source

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