Despite studies clearly demonstrating significant benefit from increasing oxygen delivery in the peri-operative period in high risk surgical patients, the technique has not been widely accepted. This is due to a variety of reasons, including non-availability of beds, particularly in the pre-operative period, and the requirement of inserting a pulmonary artery catheter. There are now data that s...

An enzyme preparation catalyzing the 2’-hydroxylation of thymidine was prepared from mycelial extracts of Neurospora crassa strain STA 4 (FGSC 2628) by chromatography on hydroxylapatite and DEAE-Sephadex A-50. The enzyme had an isoelectric point of 4.6 and a molecular weight of 47,000 (determined by gel filtration). The reaction product was identical with thymine riboside on ion exchange and th...

Thiobacillus neapolitanus, when grown in continuous culture with thiosulfate limiting growth, possessed an apparent maximal molar growth yield of 8.0 g (dry weight) per mole of thiosulfate. The substrate requirement for energy of maintenance was the highest yet reported, amounting to 21.8 mmoles of thiosulfate per g per hr. The molar growth yield, corrected for this maintenance energy requireme...

PURPOSE Oxygen distribution was characterized in the macaque retina, which is more like the human retina than others studied previously. METHODS Profiles of oxygen tension (PO2) as a function of distance were recorded in a parafoveal region about halfway between the fovea and optic disk, and from the fovea in one animal. A one-dimensional diffusion model was used to determine photoreceptor ox...

This study included the selection of three stations, two them on Tigris River passing through city Samarra, and second station representing industrial wastewater - Samarra. The period was for six months, starting from October 2021 until March 2022. knowing chemical, physical biological properties plant river water observing effect quality in River. chemical factors pH, dissolved oxygen requirem...

(ABSTRACTOxygen free radical mediated tissue injury is implicated as a major factor in the pathogenesis of the long term complications seen in the premature infant, and direct evidence of their role in the development of these long term problems is lacking. A prospective observational study of 78% of very low birthweight infants admitted to a level III neonatal intensive care unit in 1992 was u...