Breathe in, breathe out
- The influence of feeding on aerial and aquatic oxygen consumption, nitrogenous waste excretion, and metabolic fuel usage in the African lungfish, Protopterus annectens. Iftikar, F. I.; Patel, M.; Ip, Y. K.; Wood, C. M. // Canadian Journal of Zoology;Aug2008, Vol. 86 Issue 8, p790
We studied the utilization of air versus water as a respiratory medium for O2 consumption (Mo2) in the bimodally breathing African lungfish, Protopterus annectens (Owen, 1839), (151.2 Â± 3.7 g) at 26-28 Â°C. We also investigated the impact of a single meal on...
- Oxygen. Farndon, John // Science (1-59084-471-8);2003, p12
Oxygen is the second most abundant element on Earth. It is a reactive element usually found joined with other chemicals in compounds. Oxygen molecules in the air are made from two oxygen atoms. Three oxygen atoms make the gas ozone. Most life depends on oxygen because it joins with other...
- The last word. // New Scientist;6/11/2006, Vol. 186 Issue 2503, p85
This article focuses on the role of oxygen and nitrogen in respiration. Organisms need a source of energy to drive the processes of life. Respiration creates that energy. Molecular oxygen is a very powerful oxidizing agent, reacting with substances such as glucose and releasing energy in the...
- Effects of experimental warming and carbon addition on nitrate reduction and respiration in coastal sediments. Brin, Lindsay; Giblin, Anne; Rich, Jeremy // Biogeochemistry;Aug2015, Vol. 125 Issue 1, p81
Climate change may have differing effects on microbial processes that control coastal N availability. We conducted a microcosm experiment to explore effects of warming and carbon availability on nitrate reduction pathways in marine sediments. Sieved continental shelf sediments were incubated for...
- The role of an ambient pressure oxygen source during one-lung ventilation for thoracoscopic surgery. Pfitzner, J. // Anaesthesia & Intensive Care;2016, Vol. 44 Issue 1, p20
Video-assisted thoracoscopic surgery is facilitated by prompt collapse of the non-ventilated ('operated') lung, and interrupted and impeded if there is a need for oxygen (O2) delivery by continuous positive airways pressure in order to manage hypoxaemia. It has been proposed that connecting an...
- Seasonal, daily and diel N2 effluxes in permeable carbonate sediments. Eyre, B. D.; Santos, I. R.; Maher, D. T. // Biogeosciences;2013, Vol. 10 Issue 4, p2601
Benthic metabolism and inorganic nitrogen and N2 flux rates (denitrification) were measured in permeable carbonate sands from Heron Island (Great Barrier Reef). Some of the N2 flux rates were among the highest measured in sediments. All benthic fluxes showed a significant difference between...
- The compliance toolkit. // Construction Europe;Feb2012, Vol. 23 Issue 1, p34
The article focuses on the usage of the selective catalytic reduction (SCR) technology, which help reduce the nitrogen oxide back to nitrogen and oxygen by injecting a urea solution into the exhaust stream then reacts in another catalyst-impregnated honeycomb material.
- Oral and Oronasal Breathing During Continuous Exercise Produce Similar Responses to Ozone Inhalation. Adams, William C.; Schelegle, Edward S.; Shaffrath, James D. // Archives of Environmental Health;Sep/Oct89, Vol. 44 Issue 5
Examines the responses of oral and oronasal breathing during continuous exercise to ozone inhalation in California. Effect of obligatory oral breathing on pulmonary function impairment; Significance of breathing route on oxygen induced responses; Alteration of exercise ventilatory pattern.
- pressure-time product. // Taber's Cyclopedic Medical Dictionary (2009);2009, Issue 21, p1890
A definition of the term "pressure-time product" which refers to an estimate of the consumption of respiratory muscle oxygen during breathing is presented.