In the bicarbonate-dependent ATPase and carbamyl phosphate synthesis reactions catalyzed by Escherichiu coli carbamyl phosphate synthetase, the Pi formed was found to contain one oxygen derived from bicarbonate. This indicates that the bicarbonate requirement for ATPase activity is due to the same direct involvement of HC03in the ATP cleavage reaction as occurs in the presence of ammonia or glu...

Oxygen vacancies enable modulating surface reconstruction of transition metal oxides containing metal–oxygen polyhedrons into metallic oxyhydroxide for oxygen evolution reaction (OER), while revealing reconstructing mechanism is stuck by the requirement to precisely control exact sites these vacancies. Herein, are localized only within MoO4 tetrahedrons rather than CoO6 octahedrons in CoMoO4 ca...

Objective. Glucocorticoids can affect the function of bone marrow-derived mesenchymal stem cells (BMMSCs) adversely and merit the requirement for a strategy to correct this anomaly; we assessed the effect of low oxygen (2%) on BMMSCs from rabbits with osteonecrosis. Methods. Bone marrow-derived mesenchymal stem cells from normal rabbits and rabbits with osteonecrosis were divided into four grou...

UNLABELLED Home oxygen therapy programme is new in Malaysia. This programme enables children with respiratory insufficiency to be discharged home early. MATERIALS AND METHODS Long term oxygen therapy was initiated using an oxygen concentrator in patients who i) remained hypoxic while breathing room air, ii) experienced desaturations of more than 20% during sleep as seen in patients with sever...

The oxygen and carbon dioxide requirements of different biotypes of thermophilic campylobacters were investigated by means of (a) quantitative studies, and (b) total growth studies. Oxygen tolerance of the five test organisms differed markedly and varied with the carbon dioxide concentration. At most carbon dioxide concentrations tested, Campylobacter jejuni strains NCTC 11168 and NCTC 11392 to...

The microbial reduction of sulfate to hydrogen sulfide causes sewer pipe corrosion, one of the major issues in the water infrastructure [1]. Oxygen injection is presently considered as an attractive option for sulfide abatement in sewer systems. Oxygen can both inhibit the activity of sulfate reducing bacteria (SRB) and oxidize the sulfide that has been produced [2]. It is less expensive than m...

The retina has one of the highest oxygen consumptions of any tissue in the body [1] and this is mainly due to the photoreceptors and the rods in particular [2]. The rod consumption of oxygen is at its greatest when the retina is dark-adapted [3] and the rods generate dark current. At such time the choroid, the main vascular supply to the photoreceptors, is at its most sluggish and so greater de...

Abstract Oxygen is a major factor of seed germination since it allows resumption respiration and subsequent metabolism reactivation during imbibition, thus leading to the production reducing power ATP. Most studies carried out in 60s 85s indicate that oxygen requirement depends on species modulated by environmental factors. They have also demonstrated covering structures mainly inhibit limiting...

BACKGROUND Vascular smooth muscle cell (VSMC) apoptosis is a component of a variety of cardiovascular diseases and may be related to reactive oxygen species (ROS). This study was designed to determine the role of protein kinase C (PKC) in ROS-induced VSMC apoptosis. METHODS AND RESULTS Rat aortic VSMCs were exposed to H(2)O(2), and the nature of cell death was characterized in the absence or ...