Sentence examples for lowered oxygen levels from inspiring English sources

In his practice, asthma cases are up by 40-45% in the last five years, poor lung function is common, and lowered oxygen levels caused by breathing difficulties can lead to long-term problems with vision, growth and brain development, says the paediatrician.

Citing the work of geologist Lee Kump of Pennsylvania State University, University Park, Ward says that in the millennia after the mass extinction there would have been hot snaps, lowered oxygen levels in lakes and oceans, and possibly the persistence of the poisonous "swamp gas" hydrogen sulfide in the atmosphere.

Pulmonary hypoxic vasoconstriction, in which blood vessels near the hypoxic alveoli constrict (narrow their diameter) in response to the lowered oxygen levels, can occur in pulmonary contusion.

Naturally occurring climate change lowered oxygen levels in the deep ocean, decimating a broad spectrum of seafloor life that took some 1,000 years to recover, according to a study that offers a potential window into the effects of modern warming.

In response to down-regulation of oxygen homeostasis, cells during hypoxic challenge transiently or chronically tolerate lowered oxygen levels by means of adaptive mechanisms [ 1].

Direct measurements of the oxygenation status using microelectrodes carried out in patients with cancers of the uterine cervix, the head and neck region and in soft tissue sarcomas have shown that critically lowered oxygen levels (hypoxia) within the tumour tissue are associated with a poor prognosis (Höckel et al, 1993, 1996, 1998; Brizel et al, 1996; Nordsmark et al, 2005).

But the chemical reaction gives off carbon dioxide and lowers oxygen levels, which could upset deep-sea dwellers.

Despite numerous challenges associated with altitude, humans are able to adapt to lower oxygen levels, both in the short and long term, resulting in settlements with populations that reach into the millions.

Growth limiting stress at cathode due to lower oxygen levels and its effective utilization by the protons and electrons coming from anode, might have diverted the microbial metabolism towards PHA synthesis instead of oxidation.

The oil's sheen could prevent oxygen from entering the water, lowering oxygen levels in surface water at a time of year when surface and deeper waters are already stratified.

The unexpected idea has been tested only in cells and animals so far, but some scientists are already considering whether lowering oxygen levels might treat certain rare but deadly conditions.