Microcantilever-based sensors can be used to detect molecular absorption of, for example, hydrogen gas, which causes changes in the surface stress, leading to deflection of the cantilever. Such a deflection can be determined by means of optical beam deflection, capacitance-, or piezo-resistance based readout. We have recently proposed a compact integrated mechano-optical sensor using a novel an...

We investigate the heat source of the neutral gas comprising damped Ly systems. Unlike the Ly forest, where the extragalactic background radiation field ionizes and heats the gas, we find that grain photoelectric heating by the far-ultraviolet (FUV) background is not sufficient to balance the [C ii] 158 m cooling rate inferred from damped Ly systems where C ii absorption is detected. In these s...

We presentFUSE andHST STIS observations of the absorption-line system near the emission redshift of the radioquiet, X-ray-bright quasar HE 0226 4110 (z 1⁄4 0:495, V 1⁄4 15:2). The spectra cover the rest-frame wavelength range 610–11508, and we detect a wide range of ionization species, including four adjacent stages of oxygen: O iii–vi, which reveal a striking change in gas kinematics with ioni...

Perovskite-type N-substituted SrTiO3 thin films with a preferential (001) orientation were grown by pulsed laser deposition on (001)-oriented MgO and LaAlO3 substrates. Application of N2 or ammonia using a synchronized reactive gas pulse produces SrTiO3-x:Nx films with a nitrogen content of up to 4.1 at.% if prepared with the NH3 gas pulse at a substrate temperature of 720 °C. Incorporating nit...

We describe a spectrometer consisting of a vector network analyzer, a gas absorption cell, and a quasi-optical bench that acquires terahertz spectra of gaseous substances and mixtures. We tested volatile organic compounds that are medical biomarkers or chemicals which can be found on the US Environment Protection Agency list of harmful substances. Absorption spectra at gas pressures between 10 ...

The article presents research on the purification process of pyrolysis gas from hydrogen sulphide and CO2 which release waste tyre process. Pyrolysis, a for treating tyres to create priceless oil, coal, products, is gaining popularity, though. Chemically speaking, oil quite complex contains polar fractions as well almon, aromatic, heteroatoms. fuel properties reveal that it similar or light bur...

The gas transfer in aeration systems is broken into two processes: gas transfer at the bubble interface and gas transfer at the water surface. Experiments were conducted to separate these two sources of dissolved gas. Oxygen absorption was measured in a laboratory tank with air being diffused through a porous diffuser and then with nitrogen gas being diffused. The combination of these experimen...