Results 1 to 10 of about 730,165 (234)

Detection of Widespread Hot Ammonia in the Galactic Center [PDF]

, 2013
We present the detection of metastable inversion lines of ammonia from energy levels high above the ground state. We detect these lines in both emission and absorption toward fifteen of seventeen positions in the central 300 parsecs of the Galaxy. In total, we observe seven metastable transitions of ammonia: (8,8), (9,9), (10,10), (11,11), (12,12), (13,
Mills, Elisabeth A. C., Morris, Mark R.
arxiv   +3 more sources

Ionization of Ammonia Nanoices With Adsorbed Methanol Molecules [PDF]

, 2018
Large ammonia clusters represent a model system of ices which are omnipresent throughout the space. The interaction of ammonia ices with other hydrogen-boding molecules such as methanol or water and their behavior upon an ionization are thus relevant in the astrochemical context.
Ballauf, Lorenz, Chalabala, Jan, Fárník, Michal, Moriová, Kamila, Pysanenko, Andriy, Scheier, Paul, Slavícek, Petr   +6 more
arxiv   +4 more sources

Adsorption/desorption and electrically controlled flipping of ammonia molecules on graphene [PDF]

, 2010
In this paper, we evaluate of the adsorption/ desorption of ammonia molecules on a graphene surface by studying the Fermi level shift. Based on a physically plausible model, the adsorption and desorption rates of ammonia molecules on graphene have been extracted from the measured Fermi level shift as a function of exposure time.
Cai, W. W., Chen, D., Chen, S. S., Kang, J. Y., Li, X. S., Ren, Y. J., Ruoff, R. S., Zhu, Y. W., 康俊勇   +8 more
arxiv   +5 more sources

Ammonia Imaging of the Disks in the NGC 1333 IRAS 4A Protobinary System [PDF]

, 2007
The NGC 1333 IRAS 4A protobinary was observed in the ammonia (2, 2) and (3, 3) lines and in the 1.3 cm continuum with a high resolution (about 1.0 arcsec). The ammonia maps show two compact sources, one for each protostar, and they are probably protostellar accretion disks.
Aspin C., Charnley S. B., Geumsook Park, Ken'ichi Tatematsu, Miju Kang, Minho Choi   +5 more
arxiv   +3 more sources

STM/STS Study of the Density of States and Contrast Behavior at the Boundary between (7 × 7)_N and (8 × 8) Structures in the SiN/Si(111) System

Crystals, 2022
The origin of the contrast appearing in STM images at the boundary between diverse ordered structures is studied using the example of two structures, (7 × 7)N and (8 × 8), formed in the system of a two-dimensional silicon nitride layer on the Si(111 ...
Vladimir Mansurov, Timur Malin, Sergey Teys, Victor Atuchin, Denis Milakhin, Konstantin Zhuravlev   +5 more
doaj   +1 more source

Correction to “Pressure Swing Absorption and Desorption of Ammonia in Calcium Halide Solid Mixtures” [PDF]

ACS Omega
Manabu Tokushige, Ryota Fujisawa, Noriyuki Watanabe, Ken-ichi Aika, Junichi Ryu   +4 more
doaj   +2 more sources

Study on NO formation characteristics and ammonia-nitrogen conversion behavior during ammonia-coal co-firing

能源环境保护, 2023
Experiments were conducted on a laboratory drop tube furnace for the single-firing of ammonia and coal, as well as co-firing, combined with numerical simulations to investigate the NO formation characteristics, intermediate reaction processes and ammonia-
WANG Huakun, XU Yishu, ZHANG Baohua, MA Jingjing, LIU Xiaowei*   +4 more
doaj   +1 more source

One-dimensionally confined ammonia molecules: A theoretical study [PDF]

Journal of Molecular Liquids, Volume 387, 1 October 2023, 122633, 2023
We examine a single-file chain of ammonia molecules in a carbon nanotube. To this end, we use i) molecular dynamics simulations (combined with the charges for ammonia nitrogen and hydrogen obtained from quantum chemistry) and ii) lattice-model calculations [M.~Druchok {\it et al.}, J. Chem. Phys. {\bf 158}, 104304 (2023)].
arxiv   +1 more source

Sustainability of the Dairy Industry: Emissions and Mitigation Opportunities

Frontiers in Animal Science, 2021
Dairy cattle provide a major benefit to the world through upcycling human inedible feedstuffs into milk and associated dairy products. However, as beneficial as this process has become, it is not without potential negatives.
Carlyn B. Peterson, Frank M. Mitloehner
doaj   +1 more source

Uticaj oksidacije aktivnog uglja sumpornom kiselinom i impregnacije bakar-sulfatom na sorpcionu sposobnost gasnog filtra za zaštitu od dejstva amonijaka / Study of the effects of activated carbon oxidation with sulphuric acid and impregnation with copper sulphate on the protection capacity of gas filters against ammonia [PDF]

Vojnotehnički Glasnik, 2002
U radu je istraživana mogućnost poboljšanja kvaliteta aktivnog uglja (AU) za upotrebu u sredstvima za ličnu zaštitu respiratornih organa od dejstva amonijaka. Uzorci komercijalnih AU oksidovani su različitim količinama rastvora sumporne kiseline, masenih
Sretko Ilić , Dragan Nikolić
doaj   +1 more source