Latest research on Oxygen

Oxygen is a chemical element with symbol O and atomic number 8. Uptake of oxygen from the air is the essential purpose of respiration, so oxygen supplementation is used in medicine. Treatment not only increases oxygen levels in the patient's blood, but has the secondary effect of decreasing resistance to blood flow in many types of diseased lungs, easing work load on the heart. Oxygen therapy is used to treat emphysema, pneumonia, some heart disorders (congestive heart failure), some disorders that cause increased pulmonary artery pressure, and any disease that impairs the body's ability to take up and use gaseous oxygen.

Latest findings

Delivery of sufficient viable cells can be quite restrictive for food manufacturers as a considerable amount of living cells are inactivated during food processing (heat, mechanical and osmotic stress), storage (exposure to acute toxic factors such as Oxygen, hydrogen peroxide and water vapour) or during interaction with the matrix (Jankovic, Sybesma, Phothirath, Ananta, & Mercenier, 2010). [source, 2016]
To assess if these effects were mediated by the transcriptional factors NHR-49, MDT-15 and SBP-1, we exposed three null mutant strains: nhr-49 (ok2165), mdt-15 (tm2182) and sbp-1 (ok2363) to AICAR and determined AAK phosphorylation, Oxygen consumption, lactate concentration and triglyceride content. [source, 2016]
Furthermore, in null mutant nhr-49 and mdt-15 no changes were observed in Oxygen consumption, lactate and triglyceride content (Fig 6A–6C). [source, 2016]
The average distances between the side chain Oxygen of Ser236, previously identified as the catalytically active serine22, and the carbonyl carbon of Ser29 at the nisin cleavage site24 are 3.71 Å, 4.13 Å, and 7.74 Å for NSRNisin,1, NSRNisin,2 and NSRNisin,3, respectively (Fig. 4a). [source, 2016]
In the NSRNisin,1 and NSRNisin,2 MD simulations, the mean distance between the side chain Oxygen and the carbonyl carbon of ring E is <5.7 Å (Supplementary Fig. 6b). [source, 2016]
NP cells were cultured in DMEM culture medium (glucose deprivation) in a CO2 incubator at 37°C with 1% Oxygen and 95% humidity. [source, 2016]
In addition, the high permeability of films to gases e.g. water vapour and Oxygen can also impact adversely the viability of bacterial cells. [source, 2016]
Conversely, in the sbp-1 mutant strain we observed a decrease in AAK phosphorylation, although not significant, while lactate did not change and Oxygen consumption and TAGs were diminished and increased respectively. [source, 2016]
Newly developed calibration methods combining hypercapnia and hyperoxia allow Oxygen extraction fraction (OEF) and absolute CMRO2 to be estimated (Bulte et al., 2012, Gauthier and Hoge, 2013, Wise et al., 2013), and will be important in fully characterising the metabolic and vascular responses to neural activity, and separating out the effects of baseline. [source, 2016]
However, when exposed to ischemia in vitro (1% Oxygen and glucose deprivation), caspase-3 activity levels significantly increased 48 h after transfection with siRNA (survivin siRNA + in vitro ischemia compared with GFP siRNA + in vitro ischemia and untransfected + in vitro ischemia, P<0.001; Fig. [source, 2016]