Context. Little is known about the structure of the interstellar medium and the nature of individual clouds in galaxies at intermediate redshifts. The gravitational lens toward PKS1830–211 offers the unique possibility to study this interstellar gas with high sensitivity and angular resolution in a molecular cloud that existed half a Hubble time ago. Aims. This multi-line study aims at a better...

Three-arcsecond angular resolution (0.03 pc at 2.3 kpc) images of the (J,K) = (1,1) and (2,2) NH3 inversion lines toward W3 Main are presented. These observations show NH3 emission from individual clumps and filaments embedded in the lower density ammonia gas, previously observed with a spatial resolution of 40′′. Toward the molecular core W3 East we detect NH3 emission with broad line profiles...

Comprehensive field studies were initiated in 2002, to measure emissions of ammonia (NH3), hydrogen sulfide (H2S), carbon dioxide (CO2), methane (CH4), non-methane hydrocarbons (NMHC), particulate matter less than 10 microns diameter (PM10), and total suspended particulates (TSP) from swine and poultry production buildings in the U.S. This paper focuses on the quasi-continuous gas concentration...

Comprehensive field studies were initiated in 2002 to measure emissions of ammonia (NH3), hydrogen sulfide (H2S), carbon dioxide (CO2), methane (CH4), nonmethane hydrocarbons (NMHC), particulate matter <10 microm in diameter, and total suspended particulate from swine and poultry production buildings in the United States. This paper focuses on the quasicontinuous gas concentration measurement a...

Indium oxide (In2O3) nanocrystals (NCs) have been obtained via atmospheric pressure, chemical vapour deposition (APCVD) on Si(111) via the direct oxidation of In with Ar:10% O2 at 1000 C but also at temperatures as low as 500 C by the sublimation of ammonium chloride (NH4Cl) which is incorporated into the In under a gas flow of nitrogen (N2). Similarly InN NCs have also been obtained using subl...

A high H2S concentration inhibits nitrification when H2S and NH3 are simultaneously treated in a single biofilter. To improve NH3 removal from waste gases containing concentrated H2S, a two-stage biofilter was designed to solve the problem. In this study, the first biofilter, inoculated with Thiobacillus thioparus, was intended mainly to remove H2S and to reduce the effect of H2S concentration ...

This study presents a chemical ionization mass spectrometer (CIMS) for fast response, in-situ measurements of gas phase ammonia (NH3). The NH3 background level detected with the CIMS ranged between 0.3–1 ppbv, with an uncertainty of 30 pptv under optimized conditions. The instrument sensitivity varied from 4–25 Hz/pptv for >1 MHz of reagent ion signals (protonated ethanol ions), with a 30% unce...

The tungsten piperidylhydrazido complex Cl4 CH3CN W N-pip 1 was used for film growth of tungsten carbonitride WNxCy by metal-organic chemical vapor deposition CVD in the absence and presence of ammonia NH3 in H2 carrier. The microstructure of films deposited with NH3 was x-ray amorphous between 300 and 450 °C. The chemical composition of films deposited with NH3 exhibited increased N levels and...