c Oxygen is a treatment for hypoxaemia, not breathlessness. (Oxygen has not been shown to have any effect on the sensation of breathlessness in non-hypoxaemic patients.) c The essence of this guideline can be summarised simply as a requirement for oxygen to be prescribed according to a target saturation range and for those who administer oxygen therapy to monitor the patient and keep within the...

Eosinophils possess both oxygen-dependent and oxygen-independent mechanisms for damaging helminthic parasites such as schistosomula. We have studied the release of the granular enzymes beta-glucuronidase and arylsulfatase to evaluate the oxidative requirement for degranulation. Both ionophore-mediated and immunoglobulin G-mediated release of granular enzymes were enhanced in the presence of oxy...

UNLABELLED Acute deterioration in ventricular function and oxygen transport is common after cardiac surgery. We hypothesized that milrinone or amrinone may reduce their occurrence and catecholamine requirements and increase cellular enzyme levels in patients undergoing coronary artery bypass. In 45 patients, we randomly administered milrinone 50 microg/kg plus 0.5 microg x kg(-1) x min(-1) infu...

Oxygen relieves the CO2 and acetate dependency of Lactobacillus johnsonii NCC 533. The probiotic Lactobacillus johnsonii NCC 533 is relatively sensitive to oxidative stress; the presence of oxygen causes a lower biomass yield due to early growth stagnation. We show however that oxygen can also be beneficial to this organism as it relieves the requirement for acetate and CO2 during growth. Both ...

T H E PROBLEM of supplying man with his oxygen requirement and uncontaminated air during prolonged confinement is receiving considerable research attention. In particular, the recovery of oxygen using biological specimens as the mechanism for converting carbon dioxide into oxygen plus other materials has been the subject of many papers recently. There can be no doubt concerning the need for a r...

Filamentous Cercospora fungi are resistant to photosensitizing compounds that generate singlet oxygen. C. nicotianae photosensitizer-sensitive mutants were restored to full resistance by transformation with SOR1 (Singlet Oxygen Resistance 1), a gene recovered from a wild-type genomic library. SOR1 null mutants generated via targeted gene replacement confirmed the requirement for SOR1 in photose...

BACKGROUND Although a high fraction of inspired oxygen (FIO2) could reduce surgical site infection, there is concern it could increase postoperative pulmonary complications, including hypoxemia. Intraoperative positive end-expiratory pressure can improve postoperative pulmonary function. A practical measure of postoperative pulmonary function and the degree of hypoxemia is supplemental oxygen r...