The inert and certified medical gas 1,1,1,2,3,3,3-heptafluoropropane (HFP) is commonly used as a propellant in medical sprays. HFP is also of interest as tracer gas for lung function measurements. In this work a sensitive method for quantitative determination of HFP in blood was developed using headspace gas chromatography-mass spectrometry with N2 as internal standard. The limits of detection ...

We report the detection of distributed CO(3–2) line emission in nearby normal galaxies. The CO gas is a well-known tracer of physical conditions in the emitting regions. The line transitions from higher energy levels (the J=3 level is 33 K above ground) are indicators of the presence of warm and dense gas. Until now this warm gas has been studied only in the nuclei of starburst galaxies. Using ...

Carbon monoxide (CO) is one of the primary coolants of gas and an easily accessible tracer of molecular gas in spiral galaxies but it is unclear if CO plays a similar role in metal poor dwarfs. We carried out a deep observation with IRAM 30 m to search for CO emission by targeting the brightest far-IR peak in a nearby extremely metal poor galaxy, Sextans A, with 7% Solar metallicity. A weak CO ...

1. Sustainable development Today, the concept of sustainability significantly affects our life and economic activities. In 1987, the Bruntland Commission stated: “Humanity has the possibility of making development sustainable, i.e. ensuring that the needs of the present are met without compromising the ability of future generations to meet their own needs” (World Commission for environment and ...

Carbon monoxide (CO) is one of the primary coolants of gas and an easily accessible tracer of molecular gas in spiral galaxies, but it is unclear if CO plays a similar role in metal-poor dwarfs. We carried out a deep observation with IRAM 30 m to search for CO emission by targeting the brightest far-IR peak in a nearby extremely metal-poor galaxy, Sextans A, with 7% solar metallicity. A margina...