Unlabelled: Backround: Nitrogen narcosis impairs cognitive function, a fact relevant during SCUBA-diving. Oxygen-enriched air (nitrox) became popular in recreational diving, while evidence of its advantages over air is limited.
Aim: Compare effects of nitrox28 and air on two psychometric tests.
Methods: In this prospective, double-blind, open-water study, 108 advanced divers (38 females) were randomized to an air or a nitrox-group for a 60-min dive to 24 m salt water. Breathing gas effects on cognitive performance were assessed during the dive using a short- and long-term memory test and a number connection test.
Results: Nitrox28 divers made fewer mistakes only on the long-term memory test (p = 0.038). Female divers remembered more items than male divers (p < 0.001). There were no significant differences in the number connection test between the groups.
Conclusion: Likely owing to the comparatively low N reduction and the conservative dive, beneficial nitrox28 effects to diver performance were moderate but could contribute to diving safety.
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http://dx.doi.org/10.1080/15438627.2017.1314289 | DOI Listing |
ACS Omega
December 2024
Guangdong Provincial Key Laboratory of Distributed Energy System, Dongguan University of Technology, Dongguan 523820, China.
To comprehensively explore syngas cocombustion technology, gasification experiments in a bench-scale circulating fluidized bed (CFB) and three-dimensional (3D) numerical simulations of a coal-fired boiler furnace have been conducted. In the amplification experiment of biomass gasification, sawdust has been gasified using air, oxygen-enriched air, and steam. The highest heating value of the syngas products reaches 12.
View Article and Find Full Text PDFFEMS Microbes
August 2024
Department of Biotechnology, Institute of Microbiology and Microbial Biotechnology, BOKU University, Muthgasse 18, 1190 Vienna, Austria.
Heliyon
August 2024
School of Mechanical Engineering, Kanazawa University, Kakuma-machi 1, Kanazawa, Ishikawa, 9201192, Japan.
In order to effectively utilize woody biomass, which has a low abundance density, it is necessary to develop a power generation system that can convert it with high efficiency even with a small capacity as less than 2 MW. For electricity generation, it is reasonable to use a small reciprocating engine. In the case of a naturally aspirated spark ignition reciprocating engine (SIRE), the amount of aspirated gas in one cycle is determined almost entirely by the displacement.
View Article and Find Full Text PDFFront Cardiovasc Med
July 2024
Department of Cardiac Surgery, TEDA International Cardiovascular Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China.
Objective: To characterize the gas production phenomenon in the animal model of left ventricular assist device (LVAD), and study its mechanism.
Methods: An bubble precipitation experiment was conducted, and the blood samples of Parma spp. animals were divided into ordinary group and oxygen-enriched group according to whether they were oxygenated or not at the time of blood collection, and a static control group was set up respectively.
IEEE Open J Eng Med Biol
June 2024
Electronics, Information and Bioengineering Department (DEIB)Politecnico di Milano 20133 Milan Italy.
To develop and validatea novel neonatal non-invasive respiratory support device prototype designed to operate in low-resource settings. The device integrates a blower-based ventilator and a portable oxygen concentrator. A novel control algorithm was designed to achieve the desired fraction of inspired oxygen (FiO) while minimizing power consumption.
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