INTRODUCTION Portable pressure ventilators, or bi-level ventilators, do not typically have an oxygen control, and thus supplemental oxygen is usually administered by adding it into the mask or the circuit. We conducted this study to test the hypothesis that delivered oxygen concentration using this configuration is affected by the choice of leak port, oxygen injection site, and ventilator setti...

A flow injection analysis (FIA) system for evaluation of the antioxidant activity of a compound capable of scavenging a hypochlorite anion (OCl⁻), one of the reactive oxygen species (ROS), was developed. Aminophenyl fluorescein (APF), a fluorescence indicator of ROS, was mixed manually with the test compounds and the mixed solution was injected into the FIA system. The injected solution was rea...

In this computational research, the separate and simultaneous impacts of diesel direct injection timing, fuel spraying cone angle, and hydrogen gas addition on combustion characteristics, output emissions, and performance in a single-cylinder direct injection diesel engine was studied. In order to conduct the simulations, valid and reliable models for combustion, break-up, and for turbulence wa...

Shaft gas injection is considered helpful for realizing an oxygen blast furnace (OBF) to mitigate CO2 emissions substantially. This paper presents a systematic study of the shaft 430-m3 industrial OBF using process model. The operated at 35, 50, or 100 pct enrichment. It combined with reducing through tuyeres achieve reasonable flame temperature. effects rate, position, and temperature are stud...